{"632828":{"#nid":"632828","#data":{"type":"event","title":"The Georgia Tech VFS Drone Competition ","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to register for the first-ever\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch4\u003EGeorgia Tech Vertical Flight Society\u003C\/h4\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDrone Competition\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E$500 prize to the winning team\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EThe Team Registration Deadline is March 15\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003ETeams must register by emailing \u003Ca href=\u0022mailto:gt.ahs.calendar@gmail.?subject=Registering%20fore%20April%2017%20Drone%20Competition\u0022\u003E\u003Cstrong\u003Egt.ahs.calendar@gmail.\u003C\/strong\u003E\u003C\/a\u003Ecom by March 15\u003Cbr \/\u003E\r\nTeams that have not registered by this date may not participate, although team members may be added until the competition date .\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETeam Requirements\u003C\/strong\u003E\u003Cbr \/\u003E\r\nTeams may consist of as many currently enrolled Georgia Tech students as desired, but the prize will remain the same regardless of team size.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDrone Requirements\u003C\/strong\u003E\u003Cbr \/\u003E\r\nAny out-of-the-box or custom-built drones allowed as long as it is equal to or smaller than 350mm\u003Cbr \/\u003E\r\n(13\u0026frac34;\u0026rdquo;) measured diagonally from rotor shaft to rotor shaft.\u0026nbsp; First person view, manual or autonomous flight are all permitted\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EThe Competition is April 17\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EEach team will pick up and deposit as many payloads as they can during the 4 allotted minutes. The payloads will be golf balls covered in the soft side (loop side) of Velcro and will be distributed throughout the arena. Apply your creativity to design the collecting and release mechanism! Teams will compete individually on the course, and the team that collects the largest number of payloads in the time provided will be declared the winning team:\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EQUESTIONS?\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003EPlease submit questions by March 10 to\u003Cstrong\u003E \u003Ca href=\u0022mailto:gt.ahs.calendar@gmail.com?subject=April%2017%20Drone%20Competition\u0022\u003Egt.ahs.calendar@gmail.com\u003C\/a\u003E \u003C\/strong\u003E\u003Cbr \/\u003E\r\nAnswers will be posted on the Georgia Tech Vertical Flight Society website: \u003Cstrong\u003E\u003Ca href=\u0022https:\/\/ahs.gatech.edu\u0022\u003Ehttps:\/\/ahs.gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EStudents from every major are invited to participate in this competition, where a $500 grand prize will be awarded for the best drone team\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"March 15 is the deadline to register for the April 17 competition"}],"uid":"27836","created_gmt":"2020-02-21 19:32:51","changed_gmt":"2020-02-21 19:32:51","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-03-15T14:59:00-04:00","event_time_end":"2020-03-15T14:59:00-04:00","event_time_end_last":"2020-03-15T14:59:00-04:00","gmt_time_start":"2020-03-15 18:59:00","gmt_time_end":"2020-03-15 18:59:00","gmt_time_end_last":"2020-03-15 18:59:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"632818":{"id":"632818","type":"image","title":"GT Vertical Flight Society\u0027s logo","body":null,"created":"1582311446","gmt_created":"2020-02-21 18:57:26","changed":"1582311446","gmt_changed":"2020-02-21 18:57:26","alt":"Logo for the Georgia Tech CHapter of the Vertical Flight Society","file":{"fid":"240791","name":"GT Chapter Logo- VFS.jpg","image_path":"\/sites\/default\/files\/images\/GT%20Chapter%20Logo-%20VFS.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/GT%20Chapter%20Logo-%20VFS.jpg","mime":"image\/jpeg","size":41502,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/GT%20Chapter%20Logo-%20VFS.jpg?itok=RMm0lbCA"}},"632819":{"id":"632819","type":"image","title":"Triumph Group logo","body":null,"created":"1582311567","gmt_created":"2020-02-21 18:59:27","changed":"1582311567","gmt_changed":"2020-02-21 18:59:27","alt":"","file":{"fid":"240792","name":"Triumph Gropu Logo.jpg","image_path":"\/sites\/default\/files\/images\/Triumph%20Gropu%20Logo.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Triumph%20Gropu%20Logo.jpg","mime":"image\/jpeg","size":19171,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Triumph%20Gropu%20Logo.jpg?itok=qiZMyixh"}}},"media_ids":["632818","632819"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"184051","name":"Drone Competition"},{"id":"2082","name":"aerospace engineering"},{"id":"183623","name":"Vertical Flight Society"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EThe GT Vertical Flight Society\u0026#39;s email is\u003Cstrong\u003E \u003Ca href=\u0022mailto:gt.ahs.calendar@gmail.com?subject=April%2017%20Drone%20Competition\u0022\u003Egt.ahs.calendar@gmail.com\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"632769":{"#nid":"632769","#data":{"type":"event","title":"Georgia Tech-Lorraine AE Grad Info Session","body":[{"value":"\u003Cp\u003EWould you like to take your Georgia Tech master\u0026rsquo;s degree to the next level by becoming an internationally-trained engineer? Find out how you can spend one or more semesters at Georgia Tech-Lorraine, Tech\u0026rsquo;s campus in Metz, France. Pay in-state tuition, take courses taught in English by Georgia Tech faculty, and discover Europe as you pursue your degree. Come learn about the opportunity from Bertrand Boussert, director of academic programs at Georgia Tech-Lorraine.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ETake your master\u0026#39;s degree to the next level at Georgia Tech-Lorraine!\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Take your master\u0027s degree to the next level at Georgia Tech-Lorraine!"}],"uid":"27299","created_gmt":"2020-02-20 19:59:48","changed_gmt":"2020-02-20 20:02:11","author":"Michael Hagearty","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-02-26T17:15:00-05:00","event_time_end":"2020-02-26T18:00:00-05:00","event_time_end_last":"2020-02-26T18:00:00-05:00","gmt_time_start":"2020-02-26 22:15:00","gmt_time_end":"2020-02-26 23:00:00","gmt_time_end_last":"2020-02-26 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"630724":{"id":"630724","type":"image","title":"GT Lorraine","body":null,"created":"1578437253","gmt_created":"2020-01-07 22:47:33","changed":"1578437253","gmt_changed":"2020-01-07 22:47:33","alt":"Photo of glass building at the Georgia Tech Lorraine campus","file":{"fid":"240105","name":"gt-lorraine-building.jpeg","image_path":"\/sites\/default\/files\/images\/gt-lorraine-building.jpeg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/gt-lorraine-building.jpeg","mime":"image\/jpeg","size":318973,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/gt-lorraine-building.jpeg?itok=GS-A2C1E"}}},"media_ids":["630724"],"related_links":[{"url":"https:\/\/lorraine.gatech.edu\/graduate\/go\/why-gtl","title":"Why Georgia Tech-Lorraine?"}],"groups":[{"id":"1239","name":"School of Aerospace Engineering"},{"id":"1182","name":"General"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"},{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EAlina Opreanu\u003Cbr \/\u003E\r\n\u003Ca href=\u0022mailto:alina.opreanu@gtl.gatech.edu\u0022\u003Ealina.opreanu@gtl.gatech.edu\u003C\/a\u003E\u003Cbr \/\u003E\r\n404-894-0076\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"631269":{"#nid":"631269","#data":{"type":"event","title":"Vertical Flight Foundation Scholarship Info Session","body":[{"value":"\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EInterested in applying for a \u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E2020 Vertical Flight Foundation (VFF) Scholarship?\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThe Atlanta Chapter of the Vertical Flight Society (formerly the American Helicopter Society) is hosting an information session to explain the process and give tips to prospective applicants. Students from the AE School have done very well in this annual opportunity, probably because the local chapter does so much to help out applicants. \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThis is open to all students, regardless of academic major.\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ETech engineering students interested in applying for VFF scholarships are encouraged to attend this event\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Find out how to apply for a VFF scholarship from those who\u0027ve been there before"}],"uid":"27836","created_gmt":"2020-01-17 18:23:08","changed_gmt":"2020-01-23 15:09:07","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-01-23T11:00:00-05:00","event_time_end":"2020-01-23T12:00:00-05:00","event_time_end_last":"2020-01-23T12:00:00-05:00","gmt_time_start":"2020-01-23 16:00:00","gmt_time_end":"2020-01-23 17:00:00","gmt_time_end_last":"2020-01-23 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"https:\/\/vtol.org\/education\/vertical-flight-foundation-scholarships","title":"VFS Scholarship Site"}],"groups":[{"id":"1237","name":"College of Engineering"},{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"171660","name":"Vertical Flight Foundation"},{"id":"183623","name":"Vertical Flight Society"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"628674":{"#nid":"628674","#data":{"type":"event","title":"Career Info Event: Blue Origin","body":[{"value":"\u003Cp\u003E\u003Cem\u003EThe Georgia Tech Chapters of\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EWomen of Aeronautics \u0026amp; Astronautics (WoAA)\u003C\/strong\u003E\u003Cstrong\u003E\u0026nbsp; and\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EStudents for the Exploration \u0026amp; Deveopment of Space (SEDS)\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Einvite you to a\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ECareer Information Session \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Ewith recruiters from\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EBlue Origin\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBring your resumes and bring your ambition. Dress is casual but the subject is serious: career opportunities and internship opportunities at Blue Origin\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EQuestions?\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EContact Megan Kim at \u003Ca href=\u0022mailto:m33kim@gatech.edu?subject=Blue%20Origin\u0022\u003Em33kim@gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"SEDS and WoAA are sponsoring an info talk with recruiters from Blue Origin"}],"uid":"27836","created_gmt":"2019-11-06 18:31:29","changed_gmt":"2019-11-06 18:32:55","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-11-08T10:00:00-05:00","event_time_end":"2019-11-08T11:00:00-05:00","event_time_end_last":"2019-11-08T11:00:00-05:00","gmt_time_start":"2019-11-08 15:00:00","gmt_time_end":"2019-11-08 16:00:00","gmt_time_end_last":"2019-11-08 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"182997","name":"Blue Origin"},{"id":"8563","name":"careers"},{"id":"4044","name":"internship"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca href=\u0022http:\/\/blueorigin.com\/careers\u0022\u003E\u003Cstrong\u003Eblueorigin.com\/careers\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"626732":{"#nid":"626732","#data":{"type":"event","title":"AIAA Presents: Career Info Session with Relativity","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EThe Georgia Tech Chapter of the\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAmerican Institute for Aeronautics \u0026amp; Astronautics (AIAA)\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eis proud to sponsor a \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ECareer Info Session with Relativity \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECome chat with several Ralativity engineers about internships and career opportunities..\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EPresentation:\u0026nbsp; 11 a.m. to noon\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EResume Review Session: noon to 3 p.m.\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EFind out more about reume submission at: \u003Ca href=\u0022http:\/\/Tinyurl.com\/AIAA-Relativity\u0022\u003ETinyurl.com\/AIAA-Relativity\u003C\/a\u003E\u003C\/strong\u003E\u003C\/h2\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Find out more about this exciting aerospace engineering company"}],"uid":"27836","created_gmt":"2019-09-25 17:08:19","changed_gmt":"2019-09-25 17:14:05","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-10-03T12:00:00-04:00","event_time_end":"2019-10-03T16:00:00-04:00","event_time_end_last":"2019-10-03T16:00:00-04:00","gmt_time_start":"2019-10-03 16:00:00","gmt_time_end":"2019-10-03 20:00:00","gmt_time_end_last":"2019-10-03 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1237","name":"College of Engineering"},{"id":"37041","name":"Computational Science and Engineering"},{"id":"1239","name":"School of Aerospace Engineering"},{"id":"50877","name":"School of Computational Science and Engineering"},{"id":"1238","name":"School of Materials Science and Engineering"},{"id":"108731","name":"School of Mechanical Engineering"}],"categories":[],"keywords":[{"id":"86851","name":"Career Opportunities"},{"id":"1648","name":"Internships"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"615281":{"#nid":"615281","#data":{"type":"event","title":"Urban Air Mobility: An opportunity for Georgia","body":[{"value":"\u003Cp\u003EYou are invited to attend\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EUrban Air Mobility: An Opportunity for Georgia\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea one-day workshop that will explore the possibility of Atlanta and all of Georgia participating in the economic opportunity of Urban Air Mobility (UAM)\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch4\u003E\u003Ca href=\u0022https:\/\/www.eventbrite.com\/e\/urban-and-regional-air-mobility-an-opportunity-for-georgia-tickets-52881256261\u0022\u003E\u003Cem\u003E\u003Cstrong\u003ERSVP now\u003C\/strong\u003E\u003C\/em\u003E\u003C\/a\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EA premise of our discussion will be that the aircraft and technologies that enable UAM offer potential not only for urban operations but also for rural areas; hence our focus will be on urban and regional air mobility. For example, rapid commuting by air may enable increased wages for rural residents and also encourage rural growth and development, as people and businesses disaggregate from urban cores to outlying areas. Attendees will include business, government, and academic stakeholders from Atlanta and neighboring rural communities in Georgia, as well as representatives from NASA and companies participating in the nascent UAM industry.\u003C\/p\u003E\r\n\r\n\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003EAbout Urban Air Mobility...\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EThe world is now entering a new era of mobility. From electric scooters to self-driving cars, we will soon have even more choices for how to travel within cities. The same technologies that are enabling new forms of ground transportation are also enabling new types of aircraft. A new industry is emerging to address a market now being called \u0026ldquo;urban air mobility (UAM)\u0026rdquo; in which passengers and cargo are transported by short-ranged electric vertical takeoff and landing (eVTOL) aircraft at an affordable price point. As cities become more congested, UAM offers the potential for significant time savings compared to driving by overflying traffic. As one of many mobility options, UAM also will enable new levels of flexibility in multi-modal trips involving cars and transit.\u0026nbsp;\u0026nbsp;A recent market study by Booz Allen Hamilton found that if experts can overcome infrastructure and air traffic management constraints, the potential U.S. market for UAM exceeds $500 billion, carrying 16 million passengers daily, and served by 850,000 aircraft.\u0026nbsp;\u0026nbsp;In comparison, the U.S. airline market is approximately $200 billion.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EUnlike past forms of aviation, UAM will be deeply interwoven into the fabric of cities and regions. Aircraft must be low noise to avoid annoyance, vertiports must be located in a way consistent with land use regulations, and issues such as equity of access must be addressed.\u0026nbsp;\u0026nbsp;As a consumer and producer of data, UAM will be a part of the landscape of future smart cities.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWorkshop Organizers: Georgia Institute of Technology, Georgia Centers for Innovation, Georgia Chamber of Commerce, Metro Atlanta Chamber\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EA one-day workshop that will address the question: \u0026quot;How can Atlanta -- and all of Georgia-- participate in the economic opportunity of urban air mobility (UAM)?\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Join the experts as we consider the future of this exciting new trend in autonomous transportation"}],"uid":"27836","created_gmt":"2018-12-12 22:50:44","changed_gmt":"2018-12-12 22:50:44","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-01-23T08:30:00-05:00","event_time_end":"2019-01-23T16:00:00-05:00","event_time_end_last":"2019-01-23T16:00:00-05:00","gmt_time_start":"2019-01-23 13:30:00","gmt_time_end":"2019-01-23 21:00:00","gmt_time_end_last":"2019-01-23 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"179801","name":"urban air mobility"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Ch1\u003E\u003Ca href=\u0022https:\/\/www.eventbrite.com\/e\/urban-and-regional-air-mobility-an-opportunity-for-georgia-tickets-52881256261\u0022\u003E\u003Cstrong\u003ERSVP\u003C\/strong\u003E\u003C\/a\u003E\u003C\/h1\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"614065":{"#nid":"614065","#data":{"type":"event","title":"AE Presents: Aerospace, Astronauts \u0026 Leadership","body":[{"value":"\u003Cdiv\u003E\u003Cstrong\u003EYou are invited to \u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EAerospace, Astronauts \u0026amp; Leadership\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003Ea panel discussion with three astronauts who are also Georgia Tech Alumni: \u003C\/strong\u003E\u003C\/em\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch2\u003E\u003Cstrong\u003ETim Kopra, AE \u0026lsquo;95\u003C\/strong\u003E\u003C\/h2\u003E\r\n\t\u003C\/li\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch2\u003E\u003Cstrong\u003ESandy Magnus MSE \u0026lsquo;96\u003C\/strong\u003E\u003C\/h2\u003E\r\n\t\u003C\/li\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch2\u003E\u003Cstrong\u003EBill McArthur AE \u0026lsquo;83\u003C\/strong\u003E\u003C\/h2\u003E\r\n\t\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003Ealso featuring\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch2\u003E\u003Cstrong\u003EDr. Mike Griffin, Under Secretary of Defense for Research \u0026amp; Engineering\u003C\/strong\u003E\u003C\/h2\u003E\r\n\t\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\u003Cstrong\u003ESaturday, November 10, 2018 @ 5:00 p.m.\u003Cbr \/\u003E\r\nGuggenheim 442\u003Cbr \/\u003E\r\n620 Cherry Street NW\u003Cbr \/\u003E\r\nAtlanta, GA 30313\u003Cbr \/\u003E\r\nFor any questions, please send to\u003Cbr \/\u003E\r\nfarah.kashlan@ae.gatech.edu\u003Cbr \/\u003E\r\nor call 404.894.1297\u003C\/strong\u003E\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A panel discussion featuring 3 GT alumni who went on to become astronauts"}],"uid":"27836","created_gmt":"2018-11-09 16:45:17","changed_gmt":"2018-11-09 16:45:17","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-11-10T17:00:00-05:00","event_time_end":"2018-11-10T18:00:00-05:00","event_time_end_last":"2018-11-10T18:00:00-05:00","gmt_time_start":"2018-11-10 22:00:00","gmt_time_end":"2018-11-10 23:00:00","gmt_time_end_last":"2018-11-10 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"173831","name":"astronauts"},{"id":"2082","name":"aerospace engineering"},{"id":"288","name":"Leadership"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Cstrong\u003EFor any questions, please send to\u003Cbr \/\u003E\r\nfarah.kashlan@ae.gatech.edu\u003Cbr \/\u003E\r\nor call 404.894.1297\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"603286":{"#nid":"603286","#data":{"type":"event","title":"The Center for Space Technology And Research Presents  Br. Guy Consolmagno,, Director of the Vatican Observatory: ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThe Georgia Tech Center for Space Technology And Research (CSTAR)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Eis proud to present\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026ldquo;Why Do We Look Up at the Heavens?\u0026rdquo;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBr. Guy Consolmagno\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDirector of the Vatican Observatory, Rome\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout this talk\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nWhy did we go to the Moon? Why does the Vatican support an astronomical observatory? These questions mask a deeper question: why do individuals choose to spend their lives in pursuit of pure knowledge? The motivation behind our choices, both as individuals and as a society, controls the sorts of science that gets done. It determines the kinds of answers that are found to be satisfying. And ultimately, it affects the way in which we think of ourselves.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nGuy Consolmagno, SJ is a brother in the Roman Catholic Society of Jesus (the Jesuits), working since 1993 as an astronomer and meteorite specialist at the Specola Vaticana (Vatican Observatory), located in the Papal summer gardens outside Rome. Since 2014 he has been president of the Vatican Observatory Foundation, which supports the work of the Observatory and especially its 1.8 meter Vatican Advanced Technology Telescope (VATT) in Arizona. In September of 2015 he was named Director of the Vatican Observatory by Pope Francis.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EConsolmagno\u0026#39;s research explores connections between meteorites, asteroids, and the evolution of small solar system bodies. Along with more than 200 scientific publications, he is the author of a number of popular books, including: Turn Left at Orion (with Dan Davis), and most recently, Would You Baptize an Extraterrestrial? (with Fr. Paul Mueller, S.J.). He also has hosted science programs for BBC Radio 4, has been interviewed in numerous documentary films, and writes a monthly science column for the British Catholic magazine, The Tablet.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA native of Detroit, MI, Consolmagno earned two degrees from MIT and a doctorate in planetary sciences from the University of Arizona, was a postdoctoral research fellow at Harvard and MIT, served in the US Peace Corps (Kenya), and taught university physics at Lafayette College before entering the Jesuits in 1989. He has served as chair of the American Astronomical Society\u0026rsquo;s Division for Planetary Sciences (AAS\/DPS) and on the planetary surfaces nomenclature committee of the International Astronomical Union (IAU). Asteroid \u0026ldquo;4597 Consolmagno\u0026rdquo; was named in recognition of his work. In 2014 he won the Carl Sagan Med al for public outreach by the AAS\/DPS.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EWhy did we go to the Moon? Why does the Vatican support an astronomical observatory? These questions mask a deeper question: why do individuals choose to spend their lives in pursuit of pure knowledge? This talk will look at the motivation behind our choices, both as individuals and as a societ and how it controls the sorts of science that gets done. It determines the kinds of answers that are found to be satisfying. And ultimately, it affects the way in which we think of ourselves.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"A wide-ranging talk on the nature of knowledge and the Vatican\u0027s support of an astronomical observatory."}],"uid":"27836","created_gmt":"2018-03-05 19:23:08","changed_gmt":"2018-03-05 19:25:34","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-04-12T20:00:00-04:00","event_time_end":"2018-04-12T22:00:00-04:00","event_time_end_last":"2018-04-12T22:00:00-04:00","gmt_time_start":"2018-04-13 00:00:00","gmt_time_end":"2018-04-13 02:00:00","gmt_time_end_last":"2018-04-13 02:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"603287":{"id":"603287","type":"image","title":"Br. Guy Consolmagno","body":null,"created":"1520277891","gmt_created":"2018-03-05 19:24:51","changed":"1520277891","gmt_changed":"2018-03-05 19:24:51","alt":"Brother Guy Consolgmagno","file":{"fid":"229934","name":"Br. 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Refresh your orbital mechanics and explore space from different perspectives. Meant for everyone curious about astronautics at any level. Pick up new knowledge and the tools to teach it with. We will also have Kerbal Space Program game keys to give out (those are FREE copies of the game) so show up for a chance to grab one!\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Students for the Exploration and Development of Space (SEDS) will present a talk by AE student Jacob Payne"}],"uid":"27836","created_gmt":"2018-02-06 15:34:54","changed_gmt":"2018-02-06 15:34:54","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-02-08T16:30:00-05:00","event_time_end":"2018-02-08T17:30:00-05:00","event_time_end_last":"2018-02-08T17:30:00-05:00","gmt_time_start":"2018-02-08 21:30:00","gmt_time_end":"2018-02-08 22:30:00","gmt_time_end_last":"2018-02-08 22:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"601082":{"#nid":"601082","#data":{"type":"event","title":"AE Presents: Dr. N. Swaminathan from Cambridge University","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EDr. N. Swaminathan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;FlaRe Approach for Premixed and Partially-Premixed Combustion\u0026quot; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, January 22, 2018 @ 11:00 a.m\u003Cbr \/\u003E\r\nMontgomery Knight Rm 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the talk:\u003C\/em\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\nPremixed and partially premixed combustion is ubiquitous in practical combustion systems such as stationary and aero gas turbines. \u0026nbsp;However, the modelling of these combustion modes in turbulent flows is challenging. \u0026nbsp;Flamelet approach which views the turbulent flame as collection of flamelets helps to build a practically useful modelling approach but one must pay attention to the physical consistencies among various physical processes involved and their modelling. This important requirement is commonly overlooked in past studies leading one to conclude that the flamelet approach is inadequate and sophisticated approaches may be required. \u0026nbsp;The FlaRe approach (Flamelets Revised for physical consistencies) devotes attention to these details while keeping the modelling framework simple enough (low computational cost) for practical applications with complex geometries. \u0026nbsp;This talk will discuss this approach highlighting how the physical \u0026amp; mathematical consistencies are maintained among the sub-models along with few examples for its application.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the speaker:\u003C\/em\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\nN. Swaminathan\u0026nbsp;is Professor of Mechanical Engineering at Cambridge University and has held and also currently holding many distinguished visiting professorship across the globe.\u0026nbsp;\u0026nbsp;His research aims to shed lights on\u0026nbsp;fundamental aspects and practical modelling of various\u0026nbsp;facets of turbulence and combustion using mainly\u0026nbsp;numerical approach leading to simple mathematical models for industry use.\u0026nbsp;He\u0026nbsp;has worked in industry (GE R\u0026amp;D Centre \u0026amp; Tata Consulting Services) and acted as a consultant to\u0026nbsp;Pratt \u0026amp; Whitney, Rolls-Royce Marine Engines, Bergen Engines, Siemens, MHI and Ricardo Plc. \u0026nbsp;\u0026nbsp;His research is supported by EPSRC,\u0026nbsp;industries such as Rolls-Royce,\u0026nbsp;Siemens and Mitshubishi, several overseas (outside UK) research organisations, and European Commission. He is on the\u0026nbsp;editorial board of few journals in the area of energy, combustion\u0026nbsp;and fluids, member of the advisory board of GCOE in TokyoTech (2008-2013)\u0026nbsp;and, member of the advisory board and an\u0026nbsp;international co-operative member for\u0026nbsp;ACEEES (Academy for Co-creative Education of Environment and Energy Science)\u0026nbsp;programme in TokyoTech (2013-2017).\u0026nbsp;\u0026nbsp;He\u0026nbsp;and his co-authors were awarded the prestigious Sugden Prize (by Combustion Institute British Section) for their paper on\u0026nbsp;combustion noise in 2011. \u0026nbsp;He has published nearly 200 papers in the areas of turbulence and combustion, and co-edited a book with Professor Bray on Turbulent Premixed Flames published by CUP in 2011.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022FlaRe Approach for Premixed and Partially-Premixed Combustion\u0022 "}],"uid":"33975","created_gmt":"2018-01-19 19:33:11","changed_gmt":"2018-01-19 19:33:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-01-22T11:00:00-05:00","event_time_end":"2018-01-22T12:00:00-05:00","event_time_end_last":"2018-01-22T12:00:00-05:00","gmt_time_start":"2018-01-22 16:00:00","gmt_time_end":"2018-01-22 17:00:00","gmt_time_end_last":"2018-01-22 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"601030":{"#nid":"601030","#data":{"type":"event","title":"New Space Exploration Group is Forming","body":[{"value":"\u003Cp\u003EAre you an undergrad or a grad student who is intererested in exploring the future of space? Don\u0026#39;t think that one major holds the key to that future?\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EStudents for the\u003Cbr \/\u003E\r\nExploration\u0026nbsp; \u0026amp;\u003Cbr \/\u003E\r\nDevelopment of\u003Cbr \/\u003E\r\nSpace (SEDS)\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eis holding an organizational meeting on \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, January 23 @ 7 p.m. in Clough 323\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESEDS is dedicated to building a community of students who are committed to the future of space exploration from every possible angle, from engineering to entrepreneurship --- \u003Cem\u003Eand beyond!\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIf that describes your interest, join us at this organizational meeting, Jan. 23.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"SEDS is seeking students from ALL majors to explore space exploration from every angle"}],"uid":"27836","created_gmt":"2018-01-18 22:54:29","changed_gmt":"2018-01-18 22:54:29","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-01-23T19:00:00-05:00","event_time_end":"2018-01-23T20:00:00-05:00","event_time_end_last":"2018-01-23T20:00:00-05:00","gmt_time_start":"2018-01-24 00:00:00","gmt_time_end":"2018-01-24 01:00:00","gmt_time_end_last":"2018-01-24 01:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca class=\u0022x_x_x_OWAAutoLink\u0022 href=\u0022https:\/\/www.facebook.com\/events\/2019039655043068\/\u0022 id=\u0022LPlnk288151\u0022 rel=\u0022noopener noreferrer\u0022 style=\u0022font-size:12pt\u0022 target=\u0022_blank\u0022\u003Ehttps:\/\/www.facebook.com\/events\/2019039655043068\/\u003C\/a\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"600320":{"#nid":"600320","#data":{"type":"event","title":"Do You Want to Work on a Satellite Mission?","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to an\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EInformation Session \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003Eto field interested students to work on either the\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003ER\u003C\/strong\u003Eanging\u003Cstrong\u003E A\u003C\/strong\u003End \u003Cstrong\u003EN\u003C\/strong\u003Eannosatellite \u003Cstrong\u003EG\u003C\/strong\u003Euidance \u003Cstrong\u003EE\u003C\/strong\u003Experiment (\u003Cstrong\u003ERANGE\u003C\/strong\u003E)\u003C\/h3\u003E\r\n\r\n\u003Cp\u003Eor the\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003ET\u003C\/strong\u003Eethering\u003Cstrong\u003E A\u003C\/strong\u003End \u003Cstrong\u003ER\u003C\/strong\u003Eanging mission of the \u003Cstrong\u003EG\u003C\/strong\u003Eeorgia\u003Cstrong\u003E I\u003C\/strong\u003Enstitute of \u003Cstrong\u003ET\u003C\/strong\u003Eechnology \u003Cstrong\u003E(TARGIT\u003C\/strong\u003E)\u003C\/h3\u003E\r\n\r\n\u003Cp\u003Esatellite projects that are under development with aerospace engineering professor\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. Brian Gunter\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWhat you should know\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EAll majors and class ranks are welcome, especially those interested in electronics, optics\/lasers, and programming;\u003C\/li\u003E\r\n\t\u003Cli\u003EBring your resume to this session;\u003C\/li\u003E\r\n\t\u003Cli\u003EStudents should plan to devote at least 8 hrs\/week or 2 credit-hours, to the lab;\u003C\/li\u003E\r\n\t\u003Cli\u003EOnly U.S. persons (US citizens or permanent residents) may participate;\u003C\/li\u003E\r\n\t\u003Cli\u003EFor more information, contact Prof. Gunter at \u003Ca href=\u0022mailto:brian.gunter@ae.gatech.edu?subject=TARGIT%20or%20RANGE\u0022\u003Ebrian.gunter@ae.gatech.edu\u003C\/a\u003E or visit \u003Ca href=\u0022http:\/\/bgunter.gatech.edu\u0022\u003E\u003Cstrong\u003Ebgunter.gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout TARGIT \u0026amp; RANGE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA limited number of student research positions are available for two upcoming small-satellite missions.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EThe Ranging And Nanosatellite Guidance Experiment (RANGE) is a two-satellite formation that will complete assembly in Spring 2018 and will launch and commence operations in Summer 2018.\u003C\/li\u003E\r\n\t\u003Cli\u003EThe Tethering And Ranging mission of the Georgia Institute of Technology (TARGIT) is a NASA-sponsored CubeSat project that will deploy and conduct 3D lidar imaging on an inflatable target while in orbit, with an expected launch date in 2019.\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"AE professor Brian Gunter is looking for students from several majors to work on two real-world satellite missions"}],"uid":"27836","created_gmt":"2018-01-02 19:54:03","changed_gmt":"2018-01-02 23:19:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-01-09T18:00:00-05:00","event_time_end":"2018-01-09T19:30:00-05:00","event_time_end_last":"2018-01-09T19:30:00-05:00","gmt_time_start":"2018-01-09 23:00:00","gmt_time_end":"2018-01-10 00:30:00","gmt_time_end_last":"2018-01-10 00:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/bgunter.gatech.edu","title":"bgunter.gatech.edu"}],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Ch2\u003EContact Dr. Brian Gunter\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Ca href=\u0022mailto:brian.gunter@ae.gatech.edu\u0022\u003E\u003Cstrong\u003Ebrian.gunter@ae.gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"599824":{"#nid":"599824","#data":{"type":"event","title":"SEI Presents: Breakthrough Energy Ventures","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EThe Strategic Energy Institute invites you to attend\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Breakthrough Energy Ventures (BEV)\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Efeaturing\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003EDavid Danielson\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eformer assistant secretary of the U.S. Department of Energy\u0026rsquo;s Office of Energy Efficiency \u0026amp; Renewable Energy (EERE)\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBill Gates recently established a venture capital fund to foster transformational low carbon technologies. In addition to clean energy, the fund has interest in a variety of \u0026quot;Gigaton\u0026quot; technologies and approaches for reducing climate change effects (e.g., land use, agriculture, eliminating beef).\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDavid Danielson, former assistant secretary of the U.S. Department of Energy\u0026rsquo;s Office of Energy Efficiency \u0026amp; Renewable Energy (EERE), has been named the managing director for science at Breakthrough Energy Ventures (BEV). Georgia Tech\u0026rsquo;s Strategic Energy Institute (SEI) will host a one-hour forum on Friday, December 15 at 12:30pm, featuring David Danielson, who will provide an overview of BEV and speak about its vision to invest in next generation technologies that provide reliable, affordable, zero-carbon energy, food, and products to the world. This group forum will be open to the Georgia Tech campus and local innovation organizations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003ESeating is still available, and if you have interest in attending, please RSVP to \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca href=\u0022http:\/\/sei.gatech.edu\u0022\u003E\u003Cstrong\u003ESEI@gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A talk by David Samuelson, former assistant sect\u0027y, DOE\u0027s Office of Energy Efficiency \u0026 Renewable Energy"}],"uid":"27836","created_gmt":"2017-12-12 23:43:38","changed_gmt":"2017-12-12 23:46:03","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-12-15T12:30:00-05:00","event_time_end":"2017-12-15T13:30:00-05:00","event_time_end_last":"2017-12-15T13:30:00-05:00","gmt_time_start":"2017-12-15 17:30:00","gmt_time_end":"2017-12-15 18:30:00","gmt_time_end_last":"2017-12-15 18:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Cstrong\u003ERSVP at\u003C\/strong\u003E \u003Ca href=\u0022mailto:SEI@gatech.edu?subject=RSVP%20for%20Dec.%2015\u0022\u003E\u003Cstrong\u003ESEI@gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"599223":{"#nid":"599223","#data":{"type":"event","title":"M.S. Thesis Defense:  Cheong Chan","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EM.S. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ECheong Chan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Mitchell L.R. Walker)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Experimental Investigation Fast Plasma Production for the VAIPER Antenna\u0026rdquo; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday December 5, 2017 @ 9:30 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Building, Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nVery low frequency (VLF) transmission with a range from 3 to 30 kHz is used for communications and navigation due to its ability to penetrate deeply into conductors like salt water (large skin depth) and its ability to diffract around obstacles like mountains. These features are enabled by its long wavelengths (10 to 100 km). However, traditional antennas that radiate efficiently at these long wavelengths require physical lengths of 3 to 50 km. Due to physical limitations of antenna construction, VLF radiation is usually generated with electrically short antennas (100s of meters) that thermally dissipate a significant fraction of the input power. This inefficiency is due to the signal reflecting at the end of the electrically-short antenna and interfering with the subsequent part of the signal.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis work, Very-short Antennas via Ionized Plasmas for Efficient Radiation (VAIPER), proposes a technique to combine a fast-switching plasma and a special signal modulation scheme to circumvent the limitation of traditional antennas. The idea is to use the plasma as a conducting medium for the antenna. By selectively turning on and off the plasma, we can suppress the reflected signal from an electrically short antenna. In theory, this method will greatly improve the transmission efficiency of VLF antenna of a given length. The upper frequency limit of this technique is the speed at which the plasma can be modulated. The challenge is to find a method to produce a plasma compatible with the VAIPER scheme that is also scalable to larger sizes.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor this Master\u0026rsquo;s thesis, I conducted a preliminary experimental study of fast plasma ignition times and characterization under varying conditions. This project is a collaboration between the Prof Mitchell Walker\u0026rsquo;s High Power Electric Propulsion Lab (HPEPL) in Aerospace Engineering and Prof Morris Cohen\u0026rsquo;s group in Electrical and Computer Engineering at the Georgia Institute of Technology.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Mitchell L. R. Walker\u003Cem\u003E, School of Aerospace Engineering\u003C\/em\u003E\u003Cbr \/\u003E\r\nProf. Wenting Sun\u003Cem\u003E, School of Aerospace Engineering\u003C\/em\u003E\u003Cbr \/\u003E\r\nProf Morris Cohen, \u003Cem\u003ESchool of Electrical and Computer Engineering\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cExperimental Investigation Fast Plasma Production for the VAIPER Antenna\u201d "}],"uid":"33975","created_gmt":"2017-11-28 19:43:32","changed_gmt":"2017-11-28 19:44:09","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-12-05T09:30:00-05:00","event_time_end":"2017-12-05T10:30:00-05:00","event_time_end_last":"2017-12-05T10:30:00-05:00","gmt_time_start":"2017-12-05 14:30:00","gmt_time_end":"2017-12-05 15:30:00","gmt_time_end_last":"2017-12-05 15:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597979":{"#nid":"597979","#data":{"type":"event","title":"AE Presents:  Dr. Grace Gao from the University of Illinois at Urbana-Champaign","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EGrace Gao\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EUniversity of Illinois at Urbana-Champaign\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, November 20 @ 10 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight, Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nRobust and reliable GPS-based navigation is critical and challenging for a variety of applications, such as airplanes, unmanned aerial vehicles (UAVs), and autonomous driving cars. GPS may suffer from signal blockage due to building and terrain masking and multipath issues. Moreover, GPS signals are vulnerable against attacks, such as jamming or spoofing. These attacks either disable GPS positioning, or more deliberately mislead with wrong positioning.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe first present our recent work on robust GPS-based navigation. We will focus on two projects: 1) multi-receiver direct position estimation, flight tested on a Beech C-12 aircraft; 2) tight GPS\/LiDAR\/IMU sensor fusion on the raw signal level, validated using a quadcopter designed and built by our lab. We have demonstrated improved navigation\u0026nbsp;accuracy, reliability and resilience to attacks.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGrace X. Gao\u003C\/strong\u003E is an assistant professor in the Aerospace Engineering Department at University of Illinois at Urbana-Champaign. She obtained her Ph.D. degree from the GPS Laboratory at Stanford University in 2008. Before joining Illinois at Urbana-Champaign as an assistant professor in 2012, Prof. Gao was a research associate at Stanford University.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Gao has won a number of awards, including the Institute of Navigation (ION) Early Achievement Award and RTCA William E. Jackson Award. She was named one of 50 GNSS Leaders to Watch by the GPS World Magazine. She has won Best Paper\/Presentation of the Session Awards 12 times at ION conferences. She received Dean\u0026#39;s Award for Excellence in Research from College of Engineering, University of Illinois at Urbana-Champaign in 2017.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor her teaching, Prof. Gao has been on the List of Teachers Ranked as Excellent by Their Students at University of Illinois multiple times. She won the College of Engineering Everitt Award for Teaching Excellence at University of Illinois at Urbana-Champaign. She was chosen as American Institute of Aeronautics and Astronautics (AIAA) Illinois Chapter\u0026rsquo;s Teacher of the Year in 2016. She also received the Engineering Council Award for Excellence in Advising from University of Illinois at Urbana-Champaign in 2017.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cGPS-based Navigation: From UAVs to Fixed-Wing Airplanes\u201d"}],"uid":"33975","created_gmt":"2017-10-27 17:39:15","changed_gmt":"2017-11-13 15:46:46","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-20T10:00:00-05:00","event_time_end":"2017-11-20T11:00:00-05:00","event_time_end_last":"2017-11-20T11:00:00-05:00","gmt_time_start":"2017-11-20 15:00:00","gmt_time_end":"2017-11-20 16:00:00","gmt_time_end_last":"2017-11-20 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598652":{"#nid":"598652","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Takuma Nakamura","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETakuma Nakamura\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Professor Eric N. Johnson) \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Multiple-Hypothesis Vision-Based Landing Autonomy\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, November 15, 2017 @ 1:45 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003ECollege of Computing (CoC) Room 053 \u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp; \u003C\/strong\u003E\u003Cbr \/\u003E\r\nUnmanned Aerial Vehicles (UAVs) need humans in the mission loop for many tasks, and landing is one of the tasks that typically involve a human pilot. This is because of the complexity of a maneuver itself and \ufb02ight-critical factors such as recognition of a landing zone, collision avoidance, assessment of landing sites, and decision to abort the maneuver. Another critical aspect to be considered is a reliance of UAVs on GPS systems. A GPS system is not a reliable solution for landing in some scenarios (e.g. delivering a package in an urban city, and a surveillance UAV repatriating a home ship with the jammed signals), and a landing solely based on a GPS extremely decreases the UAV operation envelope. Vision is promising to achieve fully autonomous landing because it\u0026rsquo;s a rich-sensing, light, and affordable device that functions without any external resource.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAlthough vision is a powerful tool for autonomous landing, the use of vision for state estimation requires extensive consideration. First of all, vision-based landing faces a problem of occlusion. The target detected at a high altitude would be lost at certain altitudes while a vehicle descends; however, a small visual target cannot be recognized at high altitude. Second, the errors of the measurements are highly nonlinear and non-Gaussian due to the discrete pixel space, conversion from the pixel to physical units, the complex camera model, and complexity of detection algorithms. The vision sensor produces the un\ufb01xed number of the measurement with each image, and the measurements may include false positives. Plus, the estimation system is excessively tasked in a realistic condition. The landing site would be moving, tilted, or close to an obstacle. The available landing location may not be limited to one. In addition to assessing these statuses, understanding the con\ufb01dence of the estimations is also the tasks of the vision, and the decisions to initiate, continue, and abort the mission are made based on the estimated states and con\ufb01dence. The system that handles those issues and consistently produces the navigation solution while a vehicle lands eliminates one of the limitations of the autonomous UAV operation.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis proposal presents initial work in the development of a state estimation system for UAV landing. Two types of the vision algorithms are developed to allow the system to observe a landing site at various altitudes. One uses a nested visual \ufb01ducial architecture, and the other uses a sliding window approach with a partial target. The \ufb01rst algorithm assumes the case where an arbitrary visual marker can be utilized. The second algorithm has a greater \ufb02exibility and can be used for any known target. The extended Kalman particle \ufb01lter (PF-EKF) fuses these visual measurements with other on-board sensors such as an inertial measurement unit (IMU), a GPS, a magnetometer, and a barometer to estimate the states of a vehicle and a landing location in a paradigm known as simultaneous localization and mapping (SLAM). The PF-EKF not only deal well with a highly nonlinear and non-Gaussian distribution of the measurement errors of vision but also hypothesizes and evaluates different scenarios such as multiple targets being in the line of sight. The preliminary results of a numerical simulation and an image-in-the-loop simulation are provided.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe focus of this work is to improve accuracy and consistency of the assessment of the vehicle and the landing location while a UAV is attempting a landing. Additional validation of the proposed system with real \ufb02ight test data is planned. Also, the suggested algorithm to detect an occluded target will be tested with other detection frameworks.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProfessor Eric N. Johnson, School of Aerospace Engineering (Advisor)\u003Cbr \/\u003E\r\nProfessor Eric Feron, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProfessor James Hays, School of Computer Science\u003Cbr \/\u003E\r\nProfessor Patricio Antonio Vela, School of Electrical Engineering\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cMultiple-Hypothesis Vision-Based Landing Autonomy\u201d"}],"uid":"33975","created_gmt":"2017-11-10 15:13:34","changed_gmt":"2017-11-10 15:13:34","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-15T13:45:00-05:00","event_time_end":"2017-11-15T15:45:00-05:00","event_time_end_last":"2017-11-15T15:45:00-05:00","gmt_time_start":"2017-11-15 18:45:00","gmt_time_end":"2017-11-15 20:45:00","gmt_time_end_last":"2017-11-15 20:45:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598615":{"#nid":"598615","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Yongeun Yoon ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EYongeun Yoon \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Professor Eric N. Johnson) \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;High Gain Control for Linear Systems with Unknown Higher Order Dynamics\u0026rdquo; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:00 AM, Tuesday, November 21, 2017 \u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building Room 325\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u0026nbsp;\u003Cbr \/\u003E\r\nHigh gain is desirable for many control systems that need to achieve both stability and a specific degree of performance. However, because higher-order dynamics (HOD) in the control systems in real world cause the undesirable limit cycle oscillation (LCO) or divergence, the applicable magnitude of gain is practically limited. This thesis proposes a new method of attaining maximum possible gain through the analysis and manipulation of LCO.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe existence of HODs within the control systems makes it difficult to analyze the system in the framework of the linear systems theory, which is not appropriate for the analysis of LCO either. Indeed, the HODs can be modeled as corresponding nonlinear analytic functions, enabling the LCO phenomena to be analyzed by the nonlinear systems theory specialized in the time periodic systems. This theory provides insights on the period and stability of the LCO inherent in the linear systems with HODs. Then we design linear compensators to adjust the LCO frequency that results in the reduction of the LCO amplitude to an acceptable level. As a result, we do not have to reduce the gain even in the presence of the LCO. If we do need to remove the LCO, we adjust the gain to an upper limit that does not cause the LCO. A hovering multi-rotor with complex motor\/thrust dynamics is a good example to demonstrate the proposed idea. When the nonlinear flight dynamics of a multi-rotor is linearized near the hovering equilibrium, the system is equivalent to a low-order linear system with multiple HODs. A simple flight test can demonstrate the effectiveness of the linear compensator that modifies the LCO frequency and the critical gain that prevents from the generation of LCO.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProfessor \u0026nbsp;\u0026nbsp;Eric N. Johnson, School of Aerospace Engineering (Advisor)\u003Cbr \/\u003E\r\nProfessor \u0026nbsp;\u0026nbsp;Eric M. Feron, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProfessor \u0026nbsp;\u0026nbsp;J. V. R. Prasad, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProfessor \u0026nbsp;\u0026nbsp;Magnus B. Egerstedt, School of Electrical and Computer Engineering\u003Cbr \/\u003E\r\nProfessor\u0026nbsp; \u0026nbsp;Federico Bonetto, School of Mathematics\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cHigh Gain Control for Linear Systems with Unknown Higher Order Dynamics\u201d "}],"uid":"33975","created_gmt":"2017-11-09 18:56:35","changed_gmt":"2017-11-09 18:56:35","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-21T09:00:00-05:00","event_time_end":"2017-11-21T11:00:00-05:00","event_time_end_last":"2017-11-21T11:00:00-05:00","gmt_time_start":"2017-11-21 14:00:00","gmt_time_end":"2017-11-21 16:00:00","gmt_time_end_last":"2017-11-21 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598557":{"#nid":"598557","#data":{"type":"event","title":"DCL Presents:  Dr. Paul Bogdan","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Analytical Tools for Cyber-Physical Systems:\u003Cbr \/\u003E\r\nLessons Learned from Complex (Biological) Systems\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EA talk by \u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Paul Bogdan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAssistant Professor\u003Cbr \/\u003E\r\nMing Hsieh Department of Electrical Engineering\u003Cbr \/\u003E\r\nUniversity of Southern California \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the Talk\u003C\/em\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003ECyber-physical systems (CPS) constitute a new generation of networked embedded systems that interweave computation, communication, and control to facilitate our interaction with the physical world. Consequently, the modeling, analysis and optimization of CPS architectures cannot be done in isolation. In this talk, we will draw inspiration from complex biological systems to define new theoretical foundations and master the spatio-temporal complexity introduced by interactive sensing, computation, communication, and control.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFrom microbial communities and human physiology to social and biological\/neural networks, complex interdependent systems display multi-scale spatio-temporal patterns that are frequently classified as non-linear, non-Gaussian, and\/or fractal structures. Drawing on observed causality of biological systems, we describe a new mathematical strategy for constructing compact yet accurate models that can capture the non-linear, non-Gaussian, and\/or fractal structure through a minimum number of parameters while preserving a high degree of modeling fidelity and prediction accuracy. The benefits of this mathematical modeling are tested in the context of a CPS approach to brain-machine interface for decoding human intention and describing muscle dynamics through a set of fractional order differential equations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAiming at understanding and harnessing the complexity of biological systems, we develop a statistical physics inspired framework for analyzing complex collective systems. More precisely, we describe the dynamics of a collective group of agents moving and interacting in a three-dimensional space through a free-energy landscape. Based on the energy landscape, we quantify missing information, emergence, self-organization, and complexity for a collective motion. Lastly, we exploit this energy model to describe and analyze the drug-drug interaction networks. Using a complex network science approach, we uncover functional drug categories along with the intricate relationships between them. Out of the 1141 drugs from the DrugBank 4.1 database, 85% of our analytical predictions are confirmed against current state of knowledge. This analysis can be used to decode unaccounted interactions and missing pharmacological properties that can lead to drug repositioning. Motivated by the intricate geometry of complex networks, I will conclude by summarizing our work on quantifying the multi-fractal properties of brain networks and fractality implications on solving the community detection problem.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the speaker\u003C\/em\u003E\u003C\/strong\u003E\u003Cbr \/\u003E\r\nPaul Bogdan is an assistant professor in the Ming Hsieh Department of Electrical Engineering at University of Southern California. He received his Ph.D. degree in Electrical \u0026amp; Computer Engineering at Carnegie Mellon University. His work has been recognized with a number of honors and distinctions, including the 2017 Defense Advanced Research Projects Agency (DARPA) Young Faculty Award, 2017 Okawa Foundation Award, 2015 National Science Foundation CAREER Award, 2012 A.G. Jordan Award from the Electrical and Computer Engineering Department, Carnegie Mellon University for outstanding Ph.D. thesis and service, the 2012 Best Paper Award from the Networks-on-Chip Symposium (NOCS), the 2012 D.O. Pederson Best Paper Award from IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, the 2012 Best Paper Award from the International Conference on Hardware\/Software Codesign and System Synthesis (CODES+ISSS), the 2013 Best Paper Award from the 18th Asia and South Pacific Design Automation Conference, and the 2009 Roberto Rocca Ph.D. Fellowship. His research interests include the theoretical foundations of cyber-physical systems, control of complex time varying interdependent networks, modeling and analysis of biological systems and swarms, new control algorithms for dynamical systems exhibiting multi-fractal characteristics, modeling biological\/molecular communication, development of fractal mean field games to model and analyze biological, social and technological system-of-systems, performance analysis and design methodologies for manycore systems.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Analytical Tools for Cyber-Physical Systems: Lessons Learned from Complex (Biological) Systems\u0022"}],"uid":"33975","created_gmt":"2017-11-08 19:49:09","changed_gmt":"2017-11-08 19:49:09","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-10T11:15:00-05:00","event_time_end":"2017-11-10T12:15:00-05:00","event_time_end_last":"2017-11-10T12:15:00-05:00","gmt_time_start":"2017-11-10 16:15:00","gmt_time_end":"2017-11-10 17:15:00","gmt_time_end_last":"2017-11-10 17:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598524":{"#nid":"598524","#data":{"type":"event","title":"Analytical Tools for Cyber-Physical Systems: Lessons Learned from Complex (Biological) Systems","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Analytical Tools for Cyber-Physical Systems:\u003Cbr \/\u003E\r\nLessons Learned from Complex (Biological) Systems\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003EA talk by \u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Paul Bogdan\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAssistant Professor\u003Cbr \/\u003E\r\nMing Hsieh Department of Electrical Engineering\u003Cbr \/\u003E\r\nUniversity of Southern California \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Talk\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nCyber-physical systems (CPS) constitute a new generation of networked embedded systems that interweave computation, communication, and control to facilitate our interaction with the physical world. Consequently, the modeling, analysis and optimization of CPS architectures cannot be done in isolation. In this talk, we will draw inspiration from complex biological systems to define new theoretical foundations and master the spatio-temporal complexity introduced by interactive sensing, computation, communication, and control.\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EFrom microbial communities and human physiology to social and biological\/neural networks, complex interdependent systems display multi-scale spatio-temporal patterns that are frequently classified as non-linear, non-Gaussian, and\/or fractal structures. Drawing on observed causality of biological systems, we describe a new mathematical strategy for constructing compact yet accurate models that can capture the non-linear, non-Gaussian, and\/or fractal structure through a minimum number of parameters while preserving a high degree of modeling fidelity and prediction accuracy. The benefits of this mathematical modeling are tested in the context of a CPS approach to brain-machine interface for decoding human intention and describing muscle dynamics through a set of fractional order differential equations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAiming at understanding and harnessing the complexity of biological systems, we develop a statistical physics inspired framework for analyzing complex collective systems. More precisely, we describe the dynamics of a collective group of agents moving and interacting in a three-dimensional space through a free-energy landscape. Based on the energy landscape, we quantify missing information, emergence, self-organization, and complexity for a collective motion. Lastly, we exploit this energy model to describe and analyze the drug-drug interaction networks. Using a complex network science approach, we uncover functional drug categories along with the intricate relationships between them. Out of the 1141 drugs from the DrugBank 4.1 database, 85% of our analytical predictions are confirmed against current state of knowledge. This analysis can be used to decode unaccounted interactions and missing pharmacological properties that can lead to drug repositioning. Motivated by the intricate geometry of complex networks, I will conclude by summarizing our work on quantifying the multi-fractal properties of brain networks and fractality implications on solving the community detection problem.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nPaul Bogdan is an assistant professor in the Ming Hsieh Department of Electrical Engineering at University of Southern California. He received his Ph.D. degree in Electrical \u0026amp; Computer Engineering at Carnegie Mellon University. His work has been recognized with a number of honors and distinctions, including the 2017 Defense Advanced Research Projects Agency (DARPA) Young Faculty Award, 2017 Okawa Foundation Award, 2015 National Science Foundation CAREER Award, 2012 A.G. Jordan Award from the Electrical and Computer Engineering Department, Carnegie Mellon University for outstanding Ph.D. thesis and service, the 2012 Best Paper Award from the Networks-on-Chip Symposium (NOCS), the 2012 D.O. Pederson Best Paper Award from IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, the 2012 Best Paper Award from the International Conference on Hardware\/Software Codesign and System Synthesis (CODES+ISSS), the 2013 Best Paper Award from the 18th Asia and South Pacific Design Automation Conference, and the 2009 Roberto Rocca Ph.D. Fellowship. His research interests include the theoretical foundations of cyber-physical systems, control of complex time varying interdependent networks, modeling and analysis of biological systems and swarms, new control algorithms for dynamical systems exhibiting multi-fractal characteristics, modeling biological\/molecular communication, development of fractal mean field games to model and analyze biological, social and technological system-of-systems, performance analysis and design methodologies for manycore systems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The DCL Presents a talk by Dr. Paul Bogdan"}],"uid":"27836","created_gmt":"2017-11-07 23:27:36","changed_gmt":"2017-11-08 19:42:47","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-10T11:15:00-05:00","event_time_end":"2017-11-10T12:15:00-05:00","event_time_end_last":"2017-11-10T12:15:00-05:00","gmt_time_start":"2017-11-10 16:15:00","gmt_time_end":"2017-11-10 17:15:00","gmt_time_end_last":"2017-11-10 17:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"598525":{"id":"598525","type":"image","title":"Prof. Paul Bogdan","body":null,"created":"1510097329","gmt_created":"2017-11-07 23:28:49","changed":"1510097329","gmt_changed":"2017-11-07 23:28:49","alt":"","file":{"fid":"228172","name":"Bogdan-Paul.jpg","image_path":"\/sites\/default\/files\/images\/Bogdan-Paul.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Bogdan-Paul.jpg","mime":"image\/jpeg","size":260844,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Bogdan-Paul.jpg?itok=KYwalsZJ"}}},"media_ids":["598525"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598511":{"#nid":"598511","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Shiang-Ting Yeh","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EShiang-Ting Yeh\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Professor Vigor Yang)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Data-Driven Feature Extraction and System Identification of Rocket Injector Dynamics\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, November 16\u003Csup\u003Eth\u003C\/sup\u003E, 2:00-3:00 pm\u003Cbr \/\u003E\r\nMontgomery Knight, Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nFor high-performance power generation and propulsion systems, such as those of airbreathing and rocket engines, physical experiments are expensive due to the harsh requirements of operating conditions. In addition, it is difficult to gain insight into the underlying mechanisms of the physiochemical processes involved because of the typical reliance upon optical diagnostics for experimental measurements. High-fidelity simulations can be employed to capture more salient features of the flow and combustion dynamics in engines. These computations, however, are often too expensive and time-consuming for design and development purposes.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETo enable usage of modeling\/simulation in the design workflow, the present study proposes a data-driven framework for modeling and analysis to facilitate decision making for combustor designs. Its core is a surrogate model employing a machine-learning technique called kriging, which is combined with data-driven basis functions to extract and model the underlying coherent structures from high-fidelity simulation results. This emulation framework encompasses key design parameter sensitivity analysis, physics-guided classification of design parameter sets, and flow evolution modeling for efficient design survey. A sensitivity analysis using Sobol\u0026rsquo; indices and a decision tree are incorporated into the framework to better inform the model. This information improves the surrogate model training process, which employs basis functions as regression functions over the design space for the kriging model. The novelty of the proposed approach is the construction of the model through Common Proper Orthogonal Decomposition, allowing for data-reduction and extraction of common coherent structures. The accuracy of prediction of mean flow features for new swirl injector designs is assessed and the dynamic flowfield is captured in the form of power spectrum densities. This data-driven framework also demonstrates the uncertainty quantification of predictions, providing a metric for model fit. The significantly reduced computation time required for evaluating new design points enables efficient survey of the design space.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETo further utilize simulation results, a data analytic methodology to characterize the complex nature of turbulent combustion is used to analyze the system dynamics. Comprehensive combustion stability analysis has long been sought after, as a good understanding of the coupling process would reduce the amount of testing and level of capital required for engine development. A vital component is the quantification of the distributed combustion response. The proposed methodology leverages high-fidelity large eddy simulation (LES) in combination with machine-learning techniques to quantify the spatial combustion response. This response is intended to serve as an acoustic source term in the generalized wave equation, which can be used to analyze the stability of complex propulsion systems. Treating the extracted coherent structures as time series signals, the combustion response can be deduced through autoregressive model selection, accounting for data sparsity, multicollinearity, and noise.\u0026nbsp; The results show that acoustic-vortical dynamics is the dominant mechanism determining flame stabilization. This data-driven methodology quantifies the gain and phase relationship between flowfield variables and unsteady heat release. The methodology not only accounts for the distributed combustion response through incorporation of proper orthogonal decomposition (POD) analysis, but also uses the data to identify relevant time scales, replacing the need for forcing and focusing on intrinsic dynamics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Vigor Yang\u003Cbr \/\u003E\r\nDr. Joseph Oefelein\u003Cbr \/\u003E\r\nDr. Lakshmi Sankar\u003Cbr \/\u003E\r\nDr. C.F. Jeff Wu (ISyE)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cData-Driven Feature Extraction and  System Identification of Rocket Injector Dynamics\u201d"}],"uid":"33975","created_gmt":"2017-11-07 21:08:53","changed_gmt":"2017-11-07 21:08:53","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-16T14:00:00-05:00","event_time_end":"2017-11-16T15:00:00-05:00","event_time_end_last":"2017-11-16T15:00:00-05:00","gmt_time_start":"2017-11-16 19:00:00","gmt_time_end":"2017-11-16 20:00:00","gmt_time_end_last":"2017-11-16 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597978":{"#nid":"597978","#data":{"type":"event","title":"AE Presents:  Dr. Alex Ghosh from the University of Illinois at Urbana-Champaign","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EAlex Ghosh\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EUniversity of Illinois at Urbana-Champaign\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, November 16 @ 3:30 p.m.\u003Cbr \/\u003E\r\nGuggenheim 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nWhile basic orbit determination is a well understood problem, determining a full solution to the pose estimation and surface feature map of a target resident space object poses a greater challenge. Most orbit determination approaches suppose the use of active radar, frequently from the ground, but when the system making the determination is itself a spacecraft in a nearby orbit, traditional approaches are insufficient. This problem is further complicated when the chase spacecraft performing the determination is only equipped with a passive, monocular sensor such as a camera, rather than active radar or binocular vision. Initially a Rao-Blackwellized Particle Filter was implemented, however this classic approach was not able to converge within the desired timeframe and system observability. A new algorithm was developed which achieves the desired solution by using nonlinear programming applied to bundle adjustments over time, while absorbing core concepts from the simultaneous location and mapping field. An extended Kalman filter is used at long distance to determine the location of the target\u0026rsquo;s center-of-mass during approach phases while at long ranges. This algorithm is ultimately capable of on-board pose and orbit determination of its target, and has applications for automated spacecraft servicing, and proximity operations at near Earth asteroids.\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EDr. Alexander Ghosh \u003C\/strong\u003Eis an\u003Cstrong\u003E \u003C\/strong\u003Eadjunct research assistant professor at the University of Illinois and a senior scientist at CU Aerospace. Dr. Ghosh received his PhD in Aerospace Engineering in 2013 from the University of Illinois, his Master\u0026rsquo;s Degree in Aerospace Engineering from University of Illinois in 2009, and his Bachelor\u0026rsquo;s of Aerospace Engineering from Carleton University in 2007. He is a project manager for the University of Illinois\u0026rsquo; Illinisat-2 program, and oversees the systems integration and testing for five upcoming missions, and has been PI for multiple successful research and technology development programs. In 2013, he was selected as a Research Fellow at the Center for Space Nuclear Research. During the summer of 2008, he attended the International Space University Space Studies program. His research focuses on high fidelity trajectory propagation and applications of parallel processing to numerical optimization and space navigation problems, as well as small satellite systems design.\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Pose and Orbit Determination of an Uncooperative Target Using Monocular, Passive Sensors\u0022"}],"uid":"33975","created_gmt":"2017-10-27 17:35:10","changed_gmt":"2017-11-06 16:48:21","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-16T15:30:00-05:00","event_time_end":"2017-11-16T16:30:00-05:00","event_time_end_last":"2017-11-16T16:30:00-05:00","gmt_time_start":"2017-11-16 20:30:00","gmt_time_end":"2017-11-16 21:30:00","gmt_time_end_last":"2017-11-16 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598357":{"#nid":"598357","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Achyut Panchal","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAchyut Panchal\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Suresh Menon)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Modeling \u0026amp; Simulation of Dense-to-Dilute Multiphase Reacting Flows\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, 9 November, 2017 @ 2:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nPredicting performance of liquid fueled combustors using large-eddy simulations (LES) require accurate modeling of the spray characteristics of the fuel injector, but most existing models are often limited to the dilute regime where droplets are treated as Lagrangian point particles within a Eulerian gas phase model far from the actual injector. The near-field of the injector for these methods is often modeled using empirical breakup models (still within the EL method) that require \u003Cem\u003Etuning\u003C\/em\u003E to match the experimental data, or by using decoupled interface resolved primary breakup simulations of the liquid jet from the injector which are too numerical intensive for their use in the far-field. A fully coupled approach should take advantage of both these near and far field techniques, but is currently not possible as the intermediate regimes where the finite volume fraction and finite size particle effects play an important role have not been fully addressed, and are one of the primary focus of this effort. For LES, point particles are much smaller than the grid resolution, and so, subgrid modeling is also required for their coupling with the unresolved gas phase.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this study, the relatively unexplored moderately dense regime and its transition to dilute regime is investigated using a mathematically consistent procedure that combines a Eulerian-Eulerian (EE) dense model with a dense-to-dilute Eulerian-Lagrangian (EL) and a finite-size particle method.\u0026nbsp; Hybrid EE-EL dispersed phase method that transitions from pure EE regime in the dense phase to EL in the dilute regime is developed allowing for a finite fraction of the cell volume to be occupied by the droplets. In addition, a finite-size particle method is proposed to allow the droplets to be larger than the grid without resolving the interfacial boundary layers. Coupling of this method with the hybrid EE-EL approach is also considered using representative configurations. This hybrid method is especially needed in the near injector region where the grid is refined to resolve the gas flow but can be so small as to violate the point-particle assumption. Subgrid dispersion and vaporization modeling for unresolved gas-spray coupling in LES is combined with the EE-EL hybrid method to establish a method that can capture many of the near-injector physical processes. Verification and validation (V \u0026amp; V) are conducted using canonical problems involving dispersion and vaporization of single\/multiple droplets in laminar\/turbulent environment followed by more complex flows such as reacting spray jets.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Suresh Menon (Advisor)\u003Cbr \/\u003E\r\nProf. Joseph Oefelein\u003Cbr \/\u003E\r\nProf. Timothy Lieuwen\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cModeling \u0026 Simulation of Dense-to-Dilute Multiphase Reacting Flows\u201d"}],"uid":"33975","created_gmt":"2017-11-03 18:31:11","changed_gmt":"2017-11-03 18:31:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-09T14:30:00-05:00","event_time_end":"2017-11-09T16:30:00-05:00","event_time_end_last":"2017-11-09T16:30:00-05:00","gmt_time_start":"2017-11-09 19:30:00","gmt_time_end":"2017-11-09 21:30:00","gmt_time_end_last":"2017-11-09 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598219":{"#nid":"598219","#data":{"type":"event","title":"Leading the Charge in Renewable and Cleaner Energy","body":[{"value":"\u003Cp\u003EJoin the Georgia Tech Strategic Energy Institute (SEI) for\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026ldquo;Leading the Charge on Renewable and Cleaner Energy\u0026rdquo;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Ea panel discussion that will include regional, national, and global perspectives\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EPanelists will include\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\u003Cstrong\u003EShannon O. Pierce\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\tVP, External Affairs, Southern Operations, Southern Company Gas\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003Cstrong\u003EStan Wise\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\tChairman, Public Service Commission\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003Cstrong\u003ENicole Holmes\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\tSVP, Sales and Contracts GE Hitachi Nuclear Energy\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003Cstrong\u003ECourtney Stoner\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\tExecutive, Automation \u0026amp; Operations Leader for Services GE Power\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u003Ca href=\u0022https:\/\/members.womensenergynetwork.org\/?nd=p_vms_registration_event_detail\u0026amp;registration_id=921\u0026amp;return_jid=121436\u0022\u003E\u003Cstrong\u003ERSVP by Nov. 6\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe American Association of Blacks in Energy (AABE)\u0026nbsp; and the Women\u0026#39;s Energy Network (WEN) are coming together for another powerful event to promote renewable and cleaner energy featuring the Strategic Energy Institute at GA Tech. Lunch will be served to those who RSVP by Nov. 6\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Ca href=\u0022https:\/\/members.womensenergynetwork.org\/?nd=p_vms_registration_event_detail\u0026amp;registration_id=921\u0026amp;return_jid=121436\u0022\u003E\u003Cstrong\u003ERSVP by Nov 6\u003C\/strong\u003E\u003C\/a\u003E for this informative event which will feature a panel with representatives from the Southern Company, the Public Service Commission, GE Hitachi Nuclear Energy, and GE Power.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"The Georgia Tech Strategic Energy Institute, the Women\u0027s Energy Network and the Atlanta Association of Blacks in Energy present a lunch panel "}],"uid":"27836","created_gmt":"2017-11-01 17:38:06","changed_gmt":"2017-11-02 15:16:28","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-09T11:00:00-05:00","event_time_end":"2017-11-09T13:00:00-05:00","event_time_end_last":"2017-11-09T13:00:00-05:00","gmt_time_start":"2017-11-09 16:00:00","gmt_time_end":"2017-11-09 18:00:00","gmt_time_end_last":"2017-11-09 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca href=\u0022https:\/\/members.womensenergynetwork.org\/?nd=p_vms_registration_event_detail\u0026amp;registration_id=921\u0026amp;return_jid=121436\u0022\u003Ehttps:\/\/members.womensenergynetwork.org\/?nd=p_vms_registration_event_detail\u0026amp;registration_id=921\u0026amp;return_jid=121436\u003C\/a\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"598136":{"#nid":"598136","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Principio Tudisco","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EPrincipio Tudisco\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Suresh Menon)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Numerical Study of Super-Critical Reacting Flows with Vapor-Liquid Equilibrium (VLE)\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ENovember 13, 2017 @ 4 p.m.\u003Cbr \/\u003E\r\n\u003Cem\u003EMontgomery Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nIncrease of the operating pressure in combustion systems can achieve better combustion efficiency and propulsive performances. This characteristic is shared among different types of applications, ranging from diesel engines to gas turbines to liquid rocket engines (LRE). Particularly, in LRE, propellants are stored in their liquid state at high pressures but at temperatures lower than their critical values resulting in thermodynamic conditions that range from the \u0026ldquo;super-critical\u0026rdquo; regime (injection\/mixing), to the \u0026ldquo;ideal gas\u0026rdquo; regime (complete combustion\/nozzle expansion). Strong differences have been observed between jets at sub- and super-critical pressures, indicating that deviations in thermo-physical properties from their ideal state are extremely important and need to be accurately modeled. However, while thermodynamic models for single species are well established, correct representation of multi-component mixtures is still not well understood. This becomes an important requirement for high-fidelity simulations that aim to predict LRE conditions since early phase of propellants injection and mixing in the combustion chamber is critical for performance assessment.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, the challenges associated with the thermodynamic modeling of multi-component mixtures at super-critical conditions are addressed in the context of high-fidelity simulations. It is shown that the single-fluid approach that uses a single equation of state (EoS) to model the thermodynamic properties may fail in multi-component fluids because an additional phase information is missing. This information is included by using the Vapor-Liquid Equilibrium (VLE) concept and it is shown that consistency with thermodynamic properties is obtained for a range of multi-component mixtures. The ability of VLE combined with real-gas EoS to handle mixed regimes will be assessed using large-eddy simulations (LES) of canonical reacting shear layers as well as LRE type high-pressure reacting configurations (e.g., shear coaxial injectors).\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Suresh Menon (Advisor)\u003Cbr \/\u003E\r\nProf. Vigor Yang (AE)\u003Cbr \/\u003E\r\nProf. Jerry Seitzman (AE)\u003Cbr \/\u003E\r\nProf. Joseph Oefelein (AE)\u003Cbr \/\u003E\r\nProf. William Sirignano (Dept. of Mech. and Aerospace Eng., UCI)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Numerical Study of Super-Critical Reacting Flows with Vapor-Liquid Equilibrium (VLE)\u201d"}],"uid":"33975","created_gmt":"2017-10-31 17:22:59","changed_gmt":"2017-10-31 17:22:59","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-13T16:00:00-05:00","event_time_end":"2017-11-13T18:00:00-05:00","event_time_end_last":"2017-11-13T18:00:00-05:00","gmt_time_start":"2017-11-13 21:00:00","gmt_time_end":"2017-11-13 23:00:00","gmt_time_end_last":"2017-11-13 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"598120":{"#nid":"598120","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Abhishek Mishra","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAbhishek Mishra\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. J.V.R. Prasad)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Modelling of Multistage Axial-Centrifugal Compressor Configuration using Stream Tube Approach\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, November 15, 2017 @ 3 p.m.\u003Cbr \/\u003E\r\nMontgomery Knight 325\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nQuasi-1D flow models based upon mean-line analysis are quite popular for design and performance evaluation of multistage axial and centrifugal compressors. However, they are not so readily used for analyzing the dynamic behavior of the compressor. In this work, an unsteady 1D axial-centrifugal compressor model has been proposed, where the stage elements i.e. rotors and stators are modelled as diffusing stream tube components. The analysis being independent of any stage aerodynamic force and work terms, accurately predicts the performance of a four-stage axial industrial compressor by the incorporation of various loss mechanisms compounding to total stagnation pressure losses within stage elements. The flow communicates dynamically between two connected stream tubes through a boundary element called Compact Interface Element (CIE) which has been implemented by making use of the characteristic-based approach. CIE achieves reference frame transformation between the successive elements and also incorporates losses due to sudden flow turning occurring in a compact zone. These inlet turning and mixing loss models constitute an important feature of this work and have been implemented by the inclusion of a single model parameter. This parameter called mixing loss factor, is then tuned for nominal shaft speed and is subsequently used to predict the compressor performance for different speeds ranging from 50% to 105%. The surge line has also been accurately predicted by the suitable choice of critical incidence angle for stage elements.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAnother aspect of compressor operation is the observance of aerodynamic instabilities as the compressor is throttled to stall. Several simulations performed through the numerical solution of unsteady flow equations indicate the existence of modal perturbations prior to the stall. However, at very high compressor speeds such modal perturbations are generally not present and the compressor plunges into surge through the mechanism of spike or abrupt stall. For large plenum attached at the compressor end, the stability criterion at high speed coincides with the peak of characteristic curve.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. J.V.R. Prasad (Advisor)\u003Cbr \/\u003E\r\nDr. Yedidia Neumeier\u003Cbr \/\u003E\r\nDr. Lakshmi Sankar (AE)\u003Cbr \/\u003E\r\nDr. Jechiel Jagoda (AE)\u003Cbr \/\u003E\r\nDr. Rakesh Srivastava (Honeywell)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cModelling of Multistage Axial-Centrifugal Compressor Configuration using Stream Tube Approach\u201d"}],"uid":"33975","created_gmt":"2017-10-31 14:09:57","changed_gmt":"2017-10-31 14:09:57","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-15T15:00:00-05:00","event_time_end":"2017-11-15T17:00:00-05:00","event_time_end_last":"2017-11-15T17:00:00-05:00","gmt_time_start":"2017-11-15 20:00:00","gmt_time_end":"2017-11-15 22:00:00","gmt_time_end_last":"2017-11-15 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597975":{"#nid":"597975","#data":{"type":"event","title":"AE Presents:  Dr. Chantal Cappelletti from University de Brasilia","body":[{"value":"\u003Cp\u003E\u003Cem\u003EYou are invited to hear\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Chantal Cappelletti\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAssistant Professor, Laboratory of Aerospace Science and Innovation\u003Cbr \/\u003E\r\nUniversity de Brasilia\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u0026quot;\u003Cstrong\u003ENanosatellite Mission for Cancer Research\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, November 6 @ 11 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe presence of microgravity conditions and ionizing radiation makes space a unique environment for biomedical research. Different studies have shown a strong correlation between exposure to space environment and increased risks for human health. This is the case, for example, of cancer and osteoporosis. \u0026nbsp;The human exploration of space is of course affected by such factors.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOn the other hand, the exposure to space environment can have important effects on organisms already affected by diseases like cancers. Nevertheless, these mechanisms are not well known nor completely understood nowadays. Space environment could promote, hinder or have no effect on these cells but in any case, each result obtained by biomedical experiments in space would be of fundamental importance to increase the knowledge about the proliferation mechanisms of cancers.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETraditionally, biomedicine studies in space are performed on board large platforms such as the International Space Station. Nowadays, the advancements in technology allow to use smaller and cheaper solutions such as nanosatellite.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis seminar will present a nanosatellite mission for investigating Glioblastoma cancer cells in space. The design of the spacecraft, of all its subsystems and of the overall mission will be described. The resulting configuration will be optimized in terms of the scientific goals of the mission, taking advantage from the results of two precursor missions performed in 2011 on board the last two flights of the Space Shuttle.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EChantal Cappelletti\u003C\/strong\u003E received a BSc (2005) in Aerospace Engineering from Sapienza Universit\u0026agrave; di Roma, a MSc (2008) in Astronautical Engineering and a PhD (2012) in Aerospace Engineering from the Scuola di Ingegneria Aerospaziale della Sapienza Universit\u0026agrave; di Roma. She is currently an Assistant Professor at University of Brasilia, where she is associated with the Laboratory of Aerospace Science and Innovation (LAICA). She is the cofounder of the Italian company GAUSS Srl. She has led 6 satellite projects in Italy (UNISAT program and others) and in Brazil (SERPENS, TuPOD). She was PI of 2 missions concerning cancer cells behaviour in space. She was an ASI delegate at Inter-Agency Space Debris Coordination Committee (IADC). Her main research interests are related with Small Satellites, Biomedical Research in space, Space Debris, Astrodynamics and Attitude Control. She is member of the International Academy of Astronautics.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Nanosatellite Mission for Cancer Research\u0022"}],"uid":"33975","created_gmt":"2017-10-27 17:28:42","changed_gmt":"2017-10-30 16:56:13","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-06T11:00:00-05:00","event_time_end":"2017-11-06T12:00:00-05:00","event_time_end_last":"2017-11-06T12:00:00-05:00","gmt_time_start":"2017-11-06 16:00:00","gmt_time_end":"2017-11-06 17:00:00","gmt_time_end_last":"2017-11-06 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597992":{"#nid":"597992","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Dan Fries","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDan Fries\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Suresh Menon)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Experimental Multi-Scale Analysis of Supersonic Jets in Crossflow: Mixing and Combustion\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, November 10, 2017 @ 2 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight, Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nTo achieve novel insights into passive and chemically active turbulent mixing under conditions relevant to the development of hypersonic propulsion systems, a multi-scale (nested) diagnostic setup is proposed. A jet in supersonic crossflow is selected as the experimental setup due to it providing a complex flowfield with phenomena of current fundamental research interest. Its near field is identified as the most interesting region to characterize the interaction between small and large scales. The momentum flux ratio and molecular weight are initially varied in a single jet configuration to understand the influence of gases heavier than air\/nitrogen. Subsequently, spanwise distributed jet arrays reveal the influence of jet-jet interaction on turbulent mixing in a compressible flowfield. A laser ignition system provides highly localized regions of hot plasma to initiate chemical reactions at selected locations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMulti-scale diagnostics reveal the effects of differential filtering on mixing, the identification of characteristic scales, coherent structures, dissipation and turbulent viscosity. Turbulent kinetic energy transport from the small to the large scales against the classical view of the Kolmogorov cascade is investigated experimentally. The effect of heat release on turbulent mixing processes and the interaction between chemical reactions and compressibility features (shock and expansion waves) is assessed. Additionally, the ignition and flameholding characteristics are analyzed. In the non-reacting cases, primarily PIV and a diagnostic suitable to asses qualitative mixing (acetone PLIF or nano-particle based planar laser scattering) are used, while in the reacting cases OH-PLIF and PIV are used. Schlieren imaging is used in initial assessments and to reveal density variations and heat release in the flowfield.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Suresh Menon (advisor)\u003Cbr \/\u003E\r\nDr. Devesh Ranjan\u003Cbr \/\u003E\r\nDr. Jerry M. Seitzman\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cExperimental Multi-Scale Analysis of Supersonic Jets in Crossflow: Mixing and Combustion\u201d"}],"uid":"33975","created_gmt":"2017-10-27 19:11:56","changed_gmt":"2017-10-27 19:11:56","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-10T14:00:00-05:00","event_time_end":"2017-11-10T15:00:00-05:00","event_time_end_last":"2017-11-10T15:00:00-05:00","gmt_time_start":"2017-11-10 19:00:00","gmt_time_end":"2017-11-10 20:00:00","gmt_time_end_last":"2017-11-10 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597932":{"#nid":"597932","#data":{"type":"event","title":"AE Presents:  Dr. Riccardo Bevilacqua","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EYou are invited to hear\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Riccardo Bevilacqua\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAssociate Professor, Mechanical and Aerospace Engineering Department\u003Cbr \/\u003E\r\nUniversity of Florida \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Let Me Drag You into My World: The Beauties of Spacecraft in Atmospheric Resistance\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, November 1 @ 3 p.m.\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EImagine a world where every ground vehicle depleting its fuel or malfunctioning is abandoned on the road. In the space domain, this type of scenario has been unfolding since the Sputnik, particularly in Earth orbits ranging from upper LEO to GEO (low Earth to geostationary\/geosynchronous orbits).\u003C\/p\u003E\r\n\r\n\u003Cp\u003EI will start the talk presenting one of the research thrusts of the Advanced Autonomous Multiple Spacecraft (ADAMUS) laboratory: propellant-less control of spacecraft formation flying via atmospheric differential drag (DD) forces. The exploitation of residual drag forces in LEO for control purposes has been one of the focuses of the ADAMUS group for several years. This has led to innovative control strategies, ways to forecast the behavior of the LEO atmosphere, new ideas for space environment modeling, and novel spacecraft designs.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAfter presenting the technical details of DD, I will switch gears and tackle the problem of space debris. In fact, the tools and skillsets developed during these years attracted the attention of NASA, and I will illustrate how ADAMUS and NASA are now shaping the future of propellant-less fine control of spacecraft removal from LEO and above.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EI will conclude describing plans for the future, including the desire to create new standards for satellite designers and operators, for a responsible use of space.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Riccardo Bevilacqua \u003C\/strong\u003Eis an Associate Professor of the Mechanical and Aerospace Engineering Department, at the University of Florida. He previously served as Assistant Professor at the Rensselaer Polytechnic Institute. He holds a M.Sc. in Aerospace Engineering (2002), and a Ph.D. in Applied Mathematics (2007), both from the University of Rome, \u0026quot;Sapienza\u0026quot;, Italy. Dr. Bevilacqua is the recipient of two Young Investigator Awards, from the Air Force Office of Scientific Research (2012) and the Office of Naval Research (2013), of the 2014 Dave Ward Memorial Lecture Award from the Aerospace Controls and Guidance Systems Committee, and of two Air Force Summer Fellowships (2012 and 2015). His research interests focus on spacecraft formation flight and space robotics and he has authored and co-authored more than 80 journal and conference publications on the topic. Dr. Bevilacqua is a corresponding member of the IAA and an associate fellow of the AIAA.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cLet Me Drag You into My World: The Beauties of Spacecraft in Atmospheric Resistance\u201d"}],"uid":"33975","created_gmt":"2017-10-27 12:32:31","changed_gmt":"2017-10-27 12:32:31","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-01T16:00:00-04:00","event_time_end":"2017-11-01T17:00:00-04:00","event_time_end_last":"2017-11-01T17:00:00-04:00","gmt_time_start":"2017-11-01 20:00:00","gmt_time_end":"2017-11-01 21:00:00","gmt_time_end_last":"2017-11-01 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597911":{"#nid":"597911","#data":{"type":"event","title":"SAESAC Presents: \u201cMultiphysics Simulation of  Propulsion and Power Systems:   Challenges and Opportunities\u201d","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThe School of Aerospace Engineering Student Advisory Council (SAESAC) \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Eis proud to present\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EProf. Joseph Oefelein\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Ewho will give a talk entitled\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Multiphysics Simulation of Propulsion and Power Systems:\u0026nbsp; Challenges \u0026amp; Opportunities\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the lecture\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESimulation and analysis of flow and combustion processes in propulsion and power systems presents many new and interesting challenges. A multitude of strongly coupled fluid dynamic, thermodynamic, transport, chemical, multiphase, and heat transfer processes are intrinsically coupled and must be considered simultaneously in complex domains associated with devices such as gas-turbine and rocket engines. The problem is compounded by the broad range of time and length scales over which interactions occur due to turbulence and differences in chemical reaction rates. The nonlinear nature of the system significantly limits the number of simplifying assumptions that can be made. Conversely, some form of modeling is always required and significant sets of assumptions must be made to derive multiscale closures that are both accurate and affordable. This combination of challenges significantly complicates the process of scientific discovery and design. It also presents many new opportunities that intersect with the use and growing potential of high-performance massively-parallel computing and the related development of codes that effectively scale on state-of-the-art computer architectures. This presentation will outline the challenges and how they translate to new research opportunities for development of advanced simulation capabilities required for development of next generation propulsion and power systems.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A talk by AE\u0027s newest professor, Dr. Joseph Oefelein, formerly of Sandia National Lab"}],"uid":"27836","created_gmt":"2017-10-26 21:24:09","changed_gmt":"2017-10-26 23:38:03","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-07T11:00:00-05:00","event_time_end":"2017-11-07T12:00:00-05:00","event_time_end_last":"2017-11-07T12:00:00-05:00","gmt_time_start":"2017-11-07 16:00:00","gmt_time_end":"2017-11-07 17:00:00","gmt_time_end_last":"2017-11-07 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"594849":{"id":"594849","type":"image","title":"Prof. Joseph C. Oefelein","body":null,"created":"1503504729","gmt_created":"2017-08-23 16:12:09","changed":"1503504729","gmt_changed":"2017-08-23 16:12:09","alt":"Headshot of Dr. Joseph C. Oefelein","file":{"fid":"226704","name":"Oefelein-Joseph08-17.jpg","image_path":"\/sites\/default\/files\/images\/Oefelein-Joseph08-17.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Oefelein-Joseph08-17.jpg","mime":"image\/jpeg","size":68387,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Oefelein-Joseph08-17.jpg?itok=kllyHLg0"}}},"media_ids":["594849"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"176055","name":"multiphysics"},{"id":"167045","name":"simulation"},{"id":"176056","name":"Sandia National Lab"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597890":{"#nid":"597890","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Zhangxian Yuan","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EZhangxian Yuan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. George A. Kardomateas)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Geometric Nonlinearity Effects on the Behavior Sandwich Structures\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, October 31 @ 10 a.m.\u003Cbr \/\u003E\r\nWeber Space Science and Technology Building, Room 200\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe Extended High-order Sandwich Panel Theory (EHSAPT) accounts for the axial rigidity, the transverse compressibility and the shear effect of the core. Thus, it is suitable for sandwich composites made of a wide range of core materials, including soft cores and stiff cores. However, its analytical solution is only available to particular cases, i.e., sandwich panels with simply supported edges and subjected to sine distributed transverse loads. To obtain its solutions under general boundary conditions and loadings, a special finite element is first proposed to implement the EHSAPT with the finite element method. The proposed method extends the application of the EHSAPT and can easily handle arbitrary combinations of boundary conditions and loadings.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESmall deformation and infinitesimal strain were considered in the EHSAPT. In this dissertation, the EHSAPT is further developed to include geometric nonlinearities. Both faces and core are considered undergoing large deformation and moderate rotation. The weak form nonlinear governing equations of static behavior are derived from the principle of minimum total potential energy, and the equations of motion for dynamic response are derived from the Hamilton\u0026#39;s principle. The geometric nonlinearity effects on both static behavior and dynamic response of sandwich structures are investigated.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the literature, there are various simplifying assumptions adopted in the kinematic relations of the faces and the core when considering the geometric nonlinearities in sandwich structures. It is common that only one nonlinear term appeared in faces\u0026#39; kinematic relations is included and the core nonlinearities are neglected. A critical assessment of these assumptions, as well as the effects of including the other nonlinear terms in the faces and the core is made. It shows that the geometric nonlinearities of the core have significant effects on the behavior of sandwich structures.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe stability behavior is very important to sandwich structures. The compressive strength of the thin faces and the overall behavior of sandwich structure can be realized only if it is stabilized against buckling. As a compound structure, a sandwich structure has more complicated stability behavior than an ordinary beam. The compressibility of the core significantly affects the stability response and contributes to the local instability phenomenon. Therefore, despite the global buckling (Euler buckling), very common in ordinary beams and plates, the wrinkling, characterized as short wave buckling, may also occur in sandwich structures.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe stability investigation of sandwich structures is carried out based on the derived weak form nonlinear governing equations. The buckling analysis, which determines buckling mode shapes and critical buckling loads at a convenient manner, and the nonlinear post-buckling analysis, which evaluates the post-buckling response of sandwich structures, are both presented. Both wrinkling and global buckling are observed. It is shown that although the axial rigidity of the core usually is hundreds times smaller than that of the faces, which is often negligible in the static analysis, it has significant influence on the stability response.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. George A. Kardomateas, AE, Georgia Tech\u003Cbr \/\u003E\r\nProf. Dewey H. Hodges, AE, Georgia Tech\u003Cbr \/\u003E\r\nProf. Massimo Ruzzene, AE, Georgia Tech\u003Cbr \/\u003E\r\nProf. Julian J. Rimoli, AE, Georgia Tech\u003Cbr \/\u003E\r\nProf. Yeoshua Frostig, Technion - Israel Institute of Technology\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cGeometric Nonlinearity Effects on the Behavior Sandwich Structures\u201d"}],"uid":"33975","created_gmt":"2017-10-26 15:30:57","changed_gmt":"2017-10-26 19:57:10","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-31T11:00:00-04:00","event_time_end":"2017-10-31T13:00:00-04:00","event_time_end_last":"2017-10-31T13:00:00-04:00","gmt_time_start":"2017-10-31 15:00:00","gmt_time_end":"2017-10-31 17:00:00","gmt_time_end_last":"2017-10-31 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597473":{"#nid":"597473","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Yong Jea Kim","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EYong Jea Kim\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. \u003C\/strong\u003E\u003Cstrong\u003EBen T. Zinn)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Simulation of Full-Scale Combustion Instabilities in Small-Scale Rigs using Actively Controlled Boundary Conditions\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ENovember 6, Monday @ 3 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Building, Room 325\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The onset of combustion instabilities (CIs) has hindered the development and performance of combustion systems employed in industrial, power generation and propulsion systems for many decades.\u0026nbsp;\u0026nbsp; To Investigate CIs, actual \u0026ldquo;full-scale\u0026rdquo; engine tests are not practical because of the exorbitant cost of such tests, the large space required to house the full-sized engine, and the inability to equip full-scale engines with diagnostic systems that could measure, e.g., the temporal and spatial dependence of the mean and acoustic pressures, velocities, temperatures, compositions, and reaction rates.\u0026nbsp; Because of these difficulties, most studies of CIs to date were performed in \u0026ldquo;small-scale\u0026rdquo; setups that were geometrically similar to but smaller than the full-scale engines combustors.\u0026nbsp; While testing with these small-scale setups reduced the cost of testing and produced important results, the acoustic modes excited in the small-scale setups had considerably higher frequencies that did not simulate the lower frequency oscillations that are excited in the unstable full-scale engines.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The above discussion indicates that in order to study the driving of CIs in full-scale engines in small-scale rigs, the latter must simulate the acoustic environments, the combustion processes, and the interactions between these processes in the unstable full-scale engine.\u0026nbsp; This study developed a \u003Cem\u003Ereal time active acoustic boundary control approach\u003C\/em\u003E to simulate the acoustic environment of the full-scale engine in the small-scale rig.\u0026nbsp; The proposed approach, for the study of the driving mechanism of \u003Cem\u003Elongitudinal\u003C\/em\u003E CIs, is described in the left figure below.\u0026nbsp; It describes the proposed approach for experimentally studying the processes taking place in region (I)~(II) of an unstable full-scale engine in a small-scale rig.\u0026nbsp; To attain this goal, the active control system (ACS) needs to generate an acoustic impedance at location (II) of the small-scale rig that equals to the acoustic impedance at the corresponding location in the full-scale unstable engine.\u0026nbsp; If this is accomplished, the acoustic oscillations in the region between locations (I) and (II) in the small-scale rig and the full-scale engine would be identical.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This study has developed a \u003Cem\u003Ereal time\u003C\/em\u003E ACS, which enables the small-scale tube rig to simulate the \u003Cem\u003Elongitudinal\u003C\/em\u003E acoustic oscillations in the full-scale tubes (or engine), with the one-dimensional cold flow setup.\u0026nbsp; In this setup, the speaker at the left end of the small-scale tube rig generated acoustic oscillations that simulate the driving by the combustion process, and the speaker at the right end was actively controlled to simulate the acoustic field of the full-scale system.\u0026nbsp; It was demonstrated that the developed, actively controlled, small-scale, rig can simulate \u003Cem\u003Etravelling \u003C\/em\u003Eand \u003Cem\u003Estanding waves\u003C\/em\u003E oscillations that are encountered in longer full-scale tubes (or engines).\u0026nbsp; By modifying the ACS setup, the length of the \u0026ldquo;missing part\u0026rdquo; (see the left figure above), the simulations of the acoustic oscillations in various lengths\u0026rsquo; full-scale tubes (or engines) were demonstrated in the same small-scale rig.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This study also developed a theoretical model that determines in \u003Cem\u003Ereal time\u003C\/em\u003E the acoustic boundary condition (BC) that must be generated by the ACS at the boundaries of a small-scale rig that simulates \u003Cem\u003Etransverse\u003C\/em\u003E (\u003Cem\u003Etangential\u003C\/em\u003E) CI in an annular combustor similar to those used in gas turbines and jet engines.\u0026nbsp; In this case, the small-scale rig consists of a small section of the annular combustor and the \u0026ldquo;missing part\u0026rdquo; of the full-scale engine consists of what has been \u0026ldquo;left over\u0026rdquo; after the small-scale sector-rig has been removed from the annular combustor (see the right figure above).\u0026nbsp; To determine the BCs that needed to be established at the boundaries of the actively controlled, small-scale rig, the developed model accounts for the effects of the combustion processes and flows through the reactants supply and exhaust nozzles in the \u0026ldquo;missing part\u0026rdquo; of the engine, and for the presence of a tangential mean flow in the annular combustor.\u0026nbsp; The developed model was numerically validated and used to investigate the effects of the exhaust nozzle, combustion process, and tangential mean flow component upon the characteristics of \u003Cem\u003Etangential\u003C\/em\u003E CIs in an annular combustor.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u0026nbsp; \u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Ben T. Zinn (advisor)\u003Cbr \/\u003E\r\nProf. Jechiel Jagoda\u003Cbr \/\u003E\r\nProf. Krishan K. Ahuja\u003Cbr \/\u003E\r\nProf. Tim Lieuwen\u003Cbr \/\u003E\r\nProf. Ari Glezer\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cSimulation of Full-Scale Combustion Instabilities in Small-Scale Rigs using Actively Controlled Boundary Conditions\u201d"}],"uid":"33975","created_gmt":"2017-10-16 19:40:47","changed_gmt":"2017-10-26 12:28:03","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-06T15:00:00-05:00","event_time_end":"2017-11-06T17:00:00-05:00","event_time_end_last":"2017-11-06T17:00:00-05:00","gmt_time_start":"2017-11-06 20:00:00","gmt_time_end":"2017-11-06 22:00:00","gmt_time_end_last":"2017-11-06 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597859":{"#nid":"597859","#data":{"type":"event","title":"100 Years of Aviation at Georgia Tech","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPlease join us\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThe Daniel Guggenheim School of Aerospace Engineering is hosting a reception in honor of\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E100 Years of Aviation at Georgia Tech\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EEngineered Biosystems Building (EBB)\u003Cbr \/\u003E\r\nChildren\u0026#39;s Healthcare of Atlanta (CHOA) Seminar Room\u003Cbr \/\u003E\r\n950 Atlantic Drive NW\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;The Georgia Tech School of Aerospace Engineering Contributions to and from the Military Services Since 1917\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Daniel P. Schrage\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProfessor and Director, VLRCOE and IPLE Lab\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003ESchool of Aerospace Engineering, Georgia Tech\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EColonel, USAR, \u003Cem\u003Eretired\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe Georgia Tech School of Aerospace Engineering has roots in the Georgia Tech Military School of Aviation which was briefly established in 1917. Georgia Tech graduates, both from ROTC and regular graduations have made substantial contributions to the military services ever since. In addition, the Military Services have funded numerous education and research grants and programs to the School of AE which have helped make it the top graduate and undergraduate public aerospace school in the USA. This presentation will highlight these contributions from Georgia Tech School of AE graduates to the Military Services, as well as major programs that the Military Services have established and funded at Georgia Tech.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe original founders and the first Class of 1917 are illustrated in the figure below.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EPlease RSVP for this reception at \u003Ca href=\u0022mailto:dcl@gatech.edu?subject=RSVP%20for%20Nov.%2010\u0022\u003Edcl@gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Featuring a talk by AE Professor and Army veteran Daniel Schrage"}],"uid":"33975","created_gmt":"2017-10-25 16:34:21","changed_gmt":"2017-10-26 12:12:30","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-10T17:00:00-05:00","event_time_end":"2017-11-10T18:30:00-05:00","event_time_end_last":"2017-11-10T18:30:00-05:00","gmt_time_start":"2017-11-10 22:00:00","gmt_time_end":"2017-11-10 23:30:00","gmt_time_end_last":"2017-11-10 23:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"hg_media":{"597883":{"id":"597883","type":"image","title":"Georgia Tech School of Military Aviation","body":null,"created":"1508967856","gmt_created":"2017-10-25 21:44:16","changed":"1508968201","gmt_changed":"2017-10-25 21:50:01","alt":"","file":{"fid":"227929","name":"11-10GTMSA.jpg","image_path":"\/sites\/default\/files\/images\/11-10GTMSA.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/11-10GTMSA.jpg","mime":"image\/jpeg","size":1127067,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/11-10GTMSA.jpg?itok=e4IIkepG"}}},"media_ids":["597883"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597787":{"#nid":"597787","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Ioannis Exarchos","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EIoannis Exarchos\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Panagiotis Tsiotras)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Stochastic Optimal Control \u0026ndash; An Fbsde Sampling Approach\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, November 08, 2017 @ 10 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nStochastic optimal control lies within the foundation of mathematical control theory ever since its inception. Its usefulness has been proven in a plethora of engineering applications, such as autonomous systems, robotics, neuroscience, and financial engineering, among others. Specifically, in robotics and autonomous systems, stochastic control has become one of the most successful approaches for planning and learning, as demonstrated by its effectiveness in many applications, such as control of ground and aerial vehicles, articulated mechanisms and manipulators, and humanoid robots.\u0026nbsp; In computational neuroscience and human motor control, stochastic optimal control theory is the primary framework used in the process of modeling the underlying computational principles of the neural control of movement. Furthermore, in financial engineering, stochastic optimal control provides the main computational and analytical framework, with widespread application in portfolio management and stock market trading.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBy and large, prior work on stochastic control theory and algorithms imposes restrictive conditions such as differentiability of the dynamics and cost functions, and furthermore requires certain assumptions involving the control authority and stochasticity to be met. Thus, it may only address special classes of systems. The goal of this research is to establish a framework that goes beyond these limitations. In particular, we propose a learning stochastic control framework which capitalizes on the innate relationship between certain nonlinear PDEs and Forward and Backward SDEs (FBSDEs) demonstrated by a nonlinear version of the Feynman-Kac lemma. By means of this lemma, we are able to obtain a probabilistic representation of the solution to the nonlinear Hamilton-Jacobi-Bellman equation, expressed in form of a system of decoupled FBSDEs. This system of FBSDEs can then be simulated by employing linear regression techniques. The overall approach will allow us to learn the value function in stochastic optimal control problems with highly nonlinear dynamics.\u0026nbsp; In addition, the proposed approach exhibits the following characteristics:\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026bull; It performs stochastic control and trajectory optimization without linearization of the dynamics and quadratic approximations of the cost functions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026bull; Yields nonlinear feedback control policies that offer higher performance than their traditional trajectory optimization counterparts.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026bull; Is based on sampling, scalable, and therefore directly applicable to high dimensional systems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026bull; Expands the class of systems currently addressed by traditional stochastic optimal control methods.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe framework we develop within this thesis addresses several classes of stochastic optimal control, such as L\u003Csup\u003E2\u003C\/sup\u003E , L\u003Csup\u003E1\u003C\/sup\u003E , risk sensitive control, as well as differential games. Both fixed final time and first exit settings are considered.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Panagiotis Tsiotras (Advisor)\u003Cbr \/\u003E\r\nProf. Evangelos Theodorou (AE)\u003Cbr \/\u003E\r\nProf. Wassim Haddad (AE)\u003Cbr \/\u003E\r\nProf. Hao-min Zhou (MATH)\u003Cbr \/\u003E\r\nProf. Ionel Popescu (MATH)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cStochastic Optimal Control \u2013 An Fbsde Sampling Approach\u201d"}],"uid":"33975","created_gmt":"2017-10-24 13:25:47","changed_gmt":"2017-10-24 13:25:47","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-08T10:00:00-05:00","event_time_end":"2017-11-08T12:00:00-05:00","event_time_end_last":"2017-11-08T12:00:00-05:00","gmt_time_start":"2017-11-08 15:00:00","gmt_time_end":"2017-11-08 17:00:00","gmt_time_end_last":"2017-11-08 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594172":{"#nid":"594172","#data":{"type":"event","title":"AE Presents: Farhan Gandhi from Rensselaer Polytechnic Institute","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EProf. Farhan Gandhi\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003ERosalind and John J. Redfern Jr. \u0026lsquo;33 Endowed Chair in Aerospace Engineering \u0026amp; Aerospace Program Director\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EDepartment of Mechanical, Aerospace and Nuclear Engineering\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003ERensselaer Polytechnic Institute\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;\u003C\/strong\u003E\u003Cstrong\u003EReconfigurable Vertical Lift\u003C\/strong\u003E\u003Cstrong\u003E\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30 p.m.\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nShape adaptation, morphing, reconfiguration -- allow an aircraft to perform more optimally in diverse operating conditions.\u0026nbsp; Over the last decade there has been tremendous interest in application of reconfiguration to rotary-wing aircraft.\u0026nbsp; Some of the key morphing technologies such as extension of rotor blade span or rotor blade chord, large change in rotor blade twist or airfoil cross-section, concepts for high-speed, and the impact of these technologies on performance improvement, expansion of operating envelope, and the operational flexibility of the helicopter, will be discussed.\u0026nbsp; Implementing rotor blade morphing is a significant challenge due to space constraints on the rotor blade, transfer of power to the rotating system, as well as operation under large centrifugal loads.\u0026nbsp; A number of implementation methods will be presented, and future directions and applications will be discussed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout the speaker:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nFarhan Gandhi obtained his PhD in Aerospace Engineering from the University of Maryland\u0026rsquo;s Alfred Gessow Rotorcraft Center in 1995.\u0026nbsp; Immediately thereafter, he joined on the Aerospace faculty at Pennsylvania State University, serving as Deputy Director of the Penn State Rotorcraft Center.\u0026nbsp; In 2012 he moved to Rensselaer Polytechnic Institute as the Rosalind and John J. Redfern Endowed Chair in Aerospace Engineering.\u0026nbsp; In 2014, Dr. Gandhi assumed the position of Aerospace Program Director at RPI.\u0026nbsp; His research interest and activities cover the areas of rotorcraft dynamics and aeroelasticity and advanced rotary-wing configurations, multi-rotor UAVs, as well as smart\/adaptive structures.\u0026nbsp; Over the last several years, Dr. Gandhi has focused heavily on reconfiguration in vertical lift and high-speed rotorcraft, with funding from the US Army, US Navy, NY State, and Sikorsky Aircraft.\u0026nbsp; Dr. Gandhi is a Technical Fellow of the American Helicopter Society, winner of the 1998 AHS Francios Xavier Bagnoud Award and the 2007 Popular Mechanics Breakthrough Award (for morphing rotors).\u0026nbsp; He is a past Chair of the AHS Dynamics and Aircraft Design TCs and currently heads the AHS Education Committee.\u0026nbsp; His research group at RPI comprises of nine PhD students, a post-doctoral research scholar, and a number of undergrad students. Dr. Gandhi is author of over 235 articles appearing in archival journals and technical conference proceedings.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cReconfigurable Vertical Lift\u201d"}],"uid":"33975","created_gmt":"2017-08-08 13:28:44","changed_gmt":"2017-10-20 18:21:45","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-02T16:30:00-04:00","event_time_end":"2017-11-02T17:30:00-04:00","event_time_end_last":"2017-11-02T17:30:00-04:00","gmt_time_start":"2017-11-02 20:30:00","gmt_time_end":"2017-11-02 21:30:00","gmt_time_end_last":"2017-11-02 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597609":{"#nid":"597609","#data":{"type":"event","title":"DCL Presents:  Dr. Panagiotis Tsiotras","body":[{"value":"\u003Cp\u003E\u003Cem\u003EThe Decision-Control Lab invites you to hear\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Some Recent Advances in Optimal Motion Planning for Autonomous Systems \u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Ea talk by\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Panagiotis Tsiotras\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EFriday October 20, 2017 @ 11 a.m.\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EMontgomery Knight Building, Room 317\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EComputing efficiently a feasible or optimal trajectory between two given states lies at the core of almost every autonomous system. Traditional techniques, based on optimal control or discrete abstractions of the problem can provide optimal trajectories for a variety of problems. However, the usefulness of these techniques diminishes very quickly when one wants to plan trajectories in high-dimensional state\/configuration spaces, especially in the presence of several state constraints and\/or obstacles. In this talk I will discuss our recent work on developing asymptotically optimal motion planning algorithms using sampling based methods that expedite convergence using ideas from dynamic programming, thus bridging the gap between these recent methods and the more traditional methods based on optimal control.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EBiography:\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EDr. Tsiotras joined the faculty of the School of Aerospace Engineering at the Georgia Institute of Technology in 1998 as an Associate Professor. Prior to joining the faculty at Georgia Tech, Dr. Tsiotras was an Assistant Professor of Mechanical and Aerospace Engineering at the University of Virginia. He has held visiting appointments with INRIA, Rocquencourt, the Laboratoire de Automatique de Grenoble, and the Ecole des Mines de Paris in France. He has published over 250 journal and conference papers in the areas of astrodynamics, optimal and nonlinear control, and dynamics and control of mechanical and aerospace systems. His current research interests include analysis and control of autonomous and semi-autonomous ground, aerial and space vehicles. Dr. Tsiotras is a recipient of the NSF CAREER award, the Sigma Xi President and Visitor\u0026rsquo;s Award for Excellence in Research as well as numerous fellowships and scholarships. He is a past Associate Editor for the IEEE Transactions on Automatic Control, of the AIAA Journal of Guidance, Control, and Dynamics of the IEEE Control Systems Magazine and of the Dynamics and Control journal (now merged with the Journal of Dynamical and Control Systems). He is a Fellow of the AIAA, and a Senior Member of the IEEE.\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Some Recent Advances in Optimal Motion Planning for Autonomous Systems\u0022"}],"uid":"33975","created_gmt":"2017-10-19 15:46:53","changed_gmt":"2017-10-19 15:47:25","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-20T12:00:00-04:00","event_time_end":"2017-10-20T13:00:00-04:00","event_time_end_last":"2017-10-20T13:00:00-04:00","gmt_time_start":"2017-10-20 16:00:00","gmt_time_end":"2017-10-20 17:00:00","gmt_time_end_last":"2017-10-20 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597563":{"#nid":"597563","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Matthew Sirignano","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMatthew Sirignano\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Tim Lieuwen)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026nbsp;\u0026ldquo;Experimental Investigation of Nitrogen Oxide Production and Mitigation in a Reacting Jet in Vitiated Crossflow\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, November 6th, 10:30 \u0026ndash; 11:15\u003C\/strong\u003E\u003Cstrong\u003E a.m.\u003Cbr \/\u003E\r\nStudent Center Room 343\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nNitrogen oxides (NOx) are an undesirable byproduct of hydro-carbon combustion in air. In lean, premixed combustion, NOx levels are exponential functions of temperature and linear functions of residence time. Historically, lean premixed technologies have enabled local flame temperatures below the value where substantial NOx production occurs; consequently, most combustor technology development to date has focused on fuel\/air mixing and other operational challenges of premixed combustion (e.g., blowoff, flashback, etc). However, improved cooling technologies and high temperature materials have enabled steadily increasing combustor exit temperatures (\u0026gt;1800K), to the extent that this strategy is no longer capable of low NOx levels. Axial staging of combustion has been identified as a means to combat these issues while maintaining range of operability of combustors.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis paradigm shift motivates research into the canonical problem of a reacting jet-in-crossflow (RJICF). The NOx emissions of RJICF are influenced by the degree of premixing of the fuel jets before injection and jet\/crossflow mixing before combustion. In turn, jet\/crossflow mixing is controlled by the hydrodynamic stability of the jet, as well as degree of flame lifting. Previous work in this field has focused primarily on the flame behavior of RJICF and has established temperature rise across the jet (\u003Cem\u003E\u0026Delta;T\u003C\/em\u003E) as the primary driver of NOx production, but little work has been done to establish the sensitivities of NOx production of jets at equal \u003Cem\u003E\u0026Delta;T\u003C\/em\u003E.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EPreliminary work with rich premixed jets of low momentum flux ratio (\u003Cem\u003EJ \u003C\/em\u003E\u0026lt; 5) has been conducted. Results have established a NOx emissions benefit due to axial staging above a combustor firing temperature threshold. At constant \u003Cem\u003E\u0026Delta;T\u003C\/em\u003E, reduced NOx production was associated with reacting jets of lower momentum flux ratio and higher jet equivalence ratio. Significant lifting of the flame was observed for jet equivalence ratios above 3.5 with a correlated impact on NOx emissions. This relationship is, however, confounded due to the sensitivities of lift-off distance to jet parameters that are shown to directly impact the NOx production of the reacting jet.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe proposed work seeks to investigate the NOx emissions and flame stabilization characteristics of premixed methane\/air jets injected into a high temperature vitiated crossflow of lean natural gas\/air combustion products. The work is designed to increase the understanding of NO production sensitivity to governing RJICF parameters over a wide parameter space, to include jets with: rich and lean equivalence ratios, low \u003Cem\u003EJ \u003C\/em\u003E(\u003Cem\u003EJ \u003C\/em\u003E\u0026lt; 10) and high \u003Cem\u003EJ \u003C\/em\u003E(\u003Cem\u003EJ \u003C\/em\u003E\u0026gt; 10), and even enhanced mixing due to wall effects. In addition, the proposed work will attempt to independently control degree of flame lifting in order to generate more precise understanding of its causes and NOx impact with regards to a RJICF. This will include emissions sensitivity studies as well as detailed high speed diagnostics of the flow\/flame interaction of the lifted flame. Finally, utilizing this increased understanding, a model for a characteristic equivalence ratio of combustion based on jet and crossflow parameters as well as lift-off distance will be formulated to improve prediction and mitigation of RJICF NOx production.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cExperimental Investigation of Nitrogen Oxide Production and Mitigation in a Reacting Jet in Vitiated Crossflow\u201d"}],"uid":"33975","created_gmt":"2017-10-18 18:09:03","changed_gmt":"2017-10-18 18:12:23","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-06T10:30:00-05:00","event_time_end":"2017-11-06T11:15:00-05:00","event_time_end_last":"2017-11-06T11:15:00-05:00","gmt_time_start":"2017-11-06 15:30:00","gmt_time_end":"2017-11-06 16:15:00","gmt_time_end_last":"2017-11-06 16:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597533":{"#nid":"597533","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Emmanuel Boidot","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense \u003C\/strong\u003E\u003Cstrong\u003Eby\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EEmmanuel Boidot\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Eric Feron)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Ambush Games in Discrete and Continuous Environments\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, November 6, 2017 @ 3p.m.\u003Cbr \/\u003E\r\nTechnology Square Research Building (TSRB) 509\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nWe consider an autonomous navigation problem, whereby a traveler aims at traversing an environment in which an adversary sets an ambush. A two-players zero- sum game is introduced, describing the initial strategy of the traveler and the ambusher based on a description of the environment and the traveler initial location and desired goal. The process is single-step in the sense that agents do not reevaluate their strategy after the traveler has started moving. Players\u0026rsquo; strategies are computed as probabilistic path distributions, a realization of which is the path chosen by the traveler and the ambush location chosen by the ambusher.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA parallel is drawn between the discrete problem, where the traveler moves on a network, and the continuous problem, where the traveler moves in a compact subset of R2. Analytical optimal policies are derived. Assumptions from the Minimal Cut - Maximal Flow literature for continuous domains are used. The optimal value of the game is related to the maximum flow on the environment for sub-classes of games where the reward function for the ambusher is uniform. This proof is detailed in the discrete and continuous setups.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn order to relax the assumptions for the computation of the players\u0026rsquo; optimal strategies, a sampling-based approach is proposed, inspired by recent sampling-based motion planning techniques. Given a uniform reward function for the ambusher, optimal strategies of the sampled ambush game are proven to converge to the optimal strategy of the continuous ambush game under some sampling and connectivity constraints. A linear program is introduced that allows for the computation of optimal policies. The sampling-based approach is more general in the sense that it is compatible with constrained motion primitives for the traveler and non-uniform reward functions for the ambusher.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe sampling-based game is used to create example applications for situations where no analytic solutions of the Continuous Ambush Game have been identified. This leads to more interesting games, applicable to real world robots using modern motion planning algorithms. Examples of such games are setups where the traveler\u0026rsquo;s motion satisfies Dubins\u0026rsquo; kinematic constraints and setups where the reach of the ambusher is dependent on the speed of the traveler.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Eric Feron (Advisor)\u003Cbr \/\u003E\r\nProf. Panagiotis Tsiotras (AE)\u003Cbr \/\u003E\r\nProf. John-Paul Clarke (AE)\u003Cbr \/\u003E\r\nProf. Sam Coogan (ECE)\u003Cbr \/\u003E\r\nProf. Eric Johnson (Penn State AE)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAmbush Games in Discrete and Continuous Environments\u201d"}],"uid":"33975","created_gmt":"2017-10-18 13:38:57","changed_gmt":"2017-10-18 13:38:57","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-06T15:00:00-05:00","event_time_end":"2017-11-06T17:00:00-05:00","event_time_end_last":"2017-11-06T17:00:00-05:00","gmt_time_start":"2017-11-06 20:00:00","gmt_time_end":"2017-11-06 22:00:00","gmt_time_end_last":"2017-11-06 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597459":{"#nid":"597459","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Travis Smith","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETravis Smith\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Tim Lieuwen)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Experimental Investigation of Transverse Acoustic Instabilities\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, October 30, 2017 @ 2 p.m.\u003Cbr \/\u003E\r\nFood Processing Technology Building Auditorium\u003Cbr \/\u003E\r\nNARA \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThis work presents 5 kHz stereo PIV and OH PLIF measurements as well as OH* and CH* chemiluminescence measurements of transversely forced swirl flames. The presence of transverse forcing on this naturally unstable flow both influences the natural instabilities, as well as amplifies disturbances that may not necessarily manifest themselves during natural oscillations. By manipulating the structure of the acoustic forcing field, both axisymmetric and helical modes are preferentially excited away from the frequency of natural instability. Additionally, forced and self-excited transverse acoustic instability studies to date have strong coupling between the transverse and axial acoustic fields near the flame. This is significant, as studies suggest that it is not the transverse disturbances themselves, but rather the induced axial acoustic disturbances, that control the bulk of the heat release response.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe work first presents a method for spatially interpolating the phase locked \u003Cem\u003Er-z \u003C\/em\u003Eand \u003Cem\u003Er-theta \u003C\/em\u003Eplanar velocity and flame position data, extracting the full three-dimensional structure of the helical disturbances. These helical disturbances are also decomposed into symmetric and antisymmetric disturbances about the jet core, showing the subsequent axial evolution (in magnitude and phase) of each of these underlying disturbances. Then experiments performed with essentially the same transverse acoustic wave field, but with and without axial acoustics, show that significant heat release oscillations are only excited in the former case. The results show that the axial disturbances at the nozzle exit are the dominant cause of the heat release oscillations. These observations support the theory that the key role of the transverse motions is to act as the \u0026ldquo;clock\u0026rdquo; for the instability, setting the frequency of the oscillations while having a negligible direct effect on the actual heat release fluctuations. They also show that transverse instabilities can be damped by either actively canceling the induced axial acoustics in the nozzle (rather than the much larger energy transverse combustor disturbances), or by passively tuning the nozzle impedance to drive an axial acoustic velocity node at the nozzle outlet.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Tim Lieuwen\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Suresh Menon\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Jerry Seitzman\u003Cbr \/\u003E\r\nDr. Wenting Sun\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Devesh Ranjan\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cExperimental Investigation of Transverse Acoustic Instabilities\u201d"}],"uid":"33975","created_gmt":"2017-10-16 18:31:11","changed_gmt":"2017-10-17 12:24:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-30T15:00:00-04:00","event_time_end":"2017-10-30T17:00:00-04:00","event_time_end_last":"2017-10-30T17:00:00-04:00","gmt_time_start":"2017-10-30 19:00:00","gmt_time_end":"2017-10-30 21:00:00","gmt_time_end_last":"2017-10-30 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597441":{"#nid":"597441","#data":{"type":"event","title":"AE Presents: Dr. Ellen Yi Chen Mazumdar from Sandia National Laboratories","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Ellen Yi Chen Mazumdar\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDiagnostic Science and Engineering group\u003Cbr \/\u003E\r\nSandia National Laboratories\u0026nbsp;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Multi-Modality Sensing and Encoding for Advanced Diagnostic Measurements\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, October 27 @ 11 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nMany important physical behaviors are often poorly understood because they occur in challenging environments such as within solid propellant flames or near shockwave-induced fragmentation events. To better understand these systems, new diagnostics need to be developed that quickly gather information on multiple modalities.\u0026nbsp; In particular, I am interested in how encoding mechanisms can be exploited to gather data rapidly and then decoded to elucidate multiple physical phenomena and implement advanced control.\u0026nbsp; Many mechanisms such as optical diffraction, coherent interference, and magnetic field superposition inherently contain encoding principles, which can be further enhanced with adaptive under-sampling, active feedback control and stochastic system identification algorithms.\u0026nbsp; In this talk, I describe several multi-modality diagnostic measurement methods and discuss their application to challenging environments.\u0026nbsp; These include: 1) Digital holography methods for encoding three-dimensional information on two-dimensional sensors, 2)\u0026nbsp;Hyperspectral imaging and adaptive under-sampling, and 3)\u0026nbsp;Remote high speed magnetic field sensing of temperature, vibration, and fluid vorticity.\u0026nbsp; \u0026nbsp;The talk will conclude with an overview of my vision for how multi-modality sensing and encoding can be utilized for advancing high speed magnetic\/optical diagnostics, bio-inspired perception, and miniaturized sensing for distributed state estimation and control.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Ellen Yi Chen Mazumdar \u003C\/strong\u003Eis currently a postdoctoral appointee at Sandia National Laboratories in the Diagnostic Science and Engineering group.\u0026nbsp; She received her B.S. and M.S. in mechanical engineering from Massachusetts Institute of Technology (MIT).\u0026nbsp;\u0026nbsp; In 2015, she received her Ph.D. in mechanical engineering from the MIT BioInstrumentation Laboratory under the guidance of Professor Ian W. Hunter.\u0026nbsp; She received first place in the 2014 MIT de\u0026nbsp;Florez Graduate Design Competition for \u0026quot;outstanding ingenuity and creative development\u0026quot; of a multi-link robotic endoscope.\u0026nbsp; \u0026nbsp;She was also the recipient of the National Science Foundation Graduate Research Fellowship (2008-2013) and the National Defense Science and Engineering Graduate Fellowship through the Department of Defense (2010-2013).\u0026nbsp; Her research focuses on developing novel sensors, robots, instrumentation, and mathematical techniques for understanding or controlling physics in challenging environments.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cMulti-Modality Sensing and Encoding for Advanced Diagnostic Measurements\u201d"}],"uid":"33975","created_gmt":"2017-10-16 15:41:48","changed_gmt":"2017-10-16 15:41:48","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-27T12:00:00-04:00","event_time_end":"2017-10-27T13:00:00-04:00","event_time_end_last":"2017-10-27T13:00:00-04:00","gmt_time_start":"2017-10-27 16:00:00","gmt_time_end":"2017-10-27 17:00:00","gmt_time_end_last":"2017-10-27 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596866":{"#nid":"596866","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Kaivalya Bakshi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EKaivalya Bakshi\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Evangelos Theodorou)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;PDE Based Stochastic Control: Sampling Algorithms, Optimality Principles and Stability Analysis\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday 2 Nov 2017 @ 9:15 a.m.\u003Cbr \/\u003E\r\n\u003Cem\u003EMontgomery Knight Building Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nContinuous time\u0026nbsp;nonlinear\u0026nbsp;stochastic differential equations (SDEs) with control multiplicative noise are used to model biological motion and sensorimotor systems. Application of the Dynamic Programming Principle (DPP) to the stochastic control problem of such SDEs leads to a fully nonlinear parabolic Hamilton-Jacobi-Bellman (HJB) partial differential equation (PDE) problem. Prior work on solving HJB PDEs, specifically, the linearly solvable framework by Todorov \u003Cem\u003Eet al.\u003C\/em\u003E is fundamentally unequipped to solve this fully nonlinear PDE.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this doctoral thesis a nonlinear Feynman Kac lemma representing the fully nonlinear PDE by a second order Forward Backward SDE (2FBSDE) model is presented. Assumptions necessary for this construction are enunciated. We propose a data efficient sampling algorithm to solve 2FBSDEs which yields the control.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIf the goal is optimal control of a large ensemble of stochastic agents, the problem is inherently infinite dimensional. The control in these PDE control problems may be open loop or closed loop, in relation to the state of each agent. In the former case, control feedback for each agent is the density of the ensemble. In the latter, control feedback for each agent is the state of the agent, corresponding to the Mean Field Games (MFG) control. Practical examples\u0026nbsp;of MFG control problems are for air traffic, crowds,\u0026nbsp;code division\u0026nbsp;multiple access control, frequency synchronization in microgrids and unmanned aerial vehicle\u0026nbsp;swarms. Stability properties of multiagent feedback MFG controllers have recently garnered interest in the physics, economics and control communities. Stability of simplistic single integrator MFG control systems has been treated recently by Lions \u003Cem\u003Eet al. \u003C\/em\u003Eand Caines \u003Cem\u003Eet. al.\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, we deduce a sampling algorithm to compute the open loop PDE control of ensembles governed by a general class of SDEs with jumps. This is done by using the Infinite Dimensional Minimum Principle (IDMP) and results from statistical physics. The relationship between the IDMP and DPP is quantitatively explained by showing the relationship between the costate function and infinite dimensional value function. Further, we propose a study to create a generalized methodology for stability analysis of feedback MFG controllers, for systems more general than single integrator systems. These methods would have direct applications in control problems involving non trivial passive dynamics as well as in study of second order synchronization, such as flocking.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Evangelos Theodorou (Advisor)\u003Cbr \/\u003E\r\nDr. Piyush Grover (Principal Research Scientist, MERL)\u003Cbr \/\u003E\r\nProf. Eric Feron (AE)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cPDE Based Stochastic Control: Sampling Algorithms, Optimality Principles and Stability Analysis\u201d"}],"uid":"33975","created_gmt":"2017-10-03 15:01:34","changed_gmt":"2017-10-11 19:45:46","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-02T10:15:00-04:00","event_time_end":"2017-11-02T12:15:00-04:00","event_time_end_last":"2017-11-02T12:15:00-04:00","gmt_time_start":"2017-11-02 14:15:00","gmt_time_end":"2017-11-02 16:15:00","gmt_time_end_last":"2017-11-02 16:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597190":{"#nid":"597190","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Xiang Gao","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EXiang Gao\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Adviser: Prof. Wenting Sun)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;The Effects of Ozone Addition on Flame Propagation and Stabilization\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, Oct. 24 2017 @ 1:15 p.m.\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nCombustion plays a vital role in transportation and power generation. However, concerns of efficiency, emission, and operations at extreme conditions drive combustion to its limits. The relatively slow combustion process is generally attributed to the slow chemical reactions at low temperature conditions, such as radical production process. If the fuel oxidization pathway can be modified to circumvent these rate limiting processes, the ignition and combustion process could be dramatically accelerated. Following this idea, addition of ozone (O\u003Csub\u003E3\u003C\/sub\u003E) is proposed as a potential solution. O\u003Csub\u003E3\u003C\/sub\u003E is one of the strongest oxidizers. It can be efficiently and economically produced \u003Cem\u003Ein situ\u003C\/em\u003E at high pressures, which corresponds to the operating condition of most practical combustion devices. Compared to the time scales in most combustors, the lifetime of O\u003Csub\u003E3\u003C\/sub\u003E is long enough to allow it being transported to the desired region from an injection location to modify fuel oxidization and control the combustion process.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis dissertation investigates the effects of O\u003Csub\u003E3\u003C\/sub\u003E addition on some fundamental combustion processes, to serve as a basis for future application on practical combustion systems. These include the propagation of laminar premixed flame and the stabilization of non-premixed jet flames. Previous studies have shown that O\u003Csub\u003E3\u003C\/sub\u003E addition can enhance flame propagation, stability and ignition, but the dependence on pressure and temperature are not clear yet. Such enhancement is generally attributed to the release of reactive O atoms by the thermal decomposition of O\u003Csub\u003E3\u003C\/sub\u003E. However, this may not be always true as O\u003Csub\u003E3\u003C\/sub\u003E can react with some fuel directly via ozonolysis reaction before it decomposes.\u0026nbsp; For unsaturated hydrocarbon, such reactions release significant amounts of heat and are rapid even at room temperature. Therefore, one may expect, at proper conditions, ozonolysis reaction can initiate autoignition and fundamentally changes the flame dynamics. However, very limited studies have been conducted to explore such possibility. The results presented in this dissertation are an attempt to address these questions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe effects of O\u003Csub\u003E3\u003C\/sub\u003E addition on the propagation of laminar premixed flames are investigated first, with respect to pressure, initial temperature, O\u003Csub\u003E3\u003C\/sub\u003E concentration and fuel kinetics. For alkane\/air premixed laminar flames, high-pressure Bunsen flame experiments in the present work showed that the enhancement in laminar flame speed (\u003Cem\u003ES\u003C\/em\u003E\u003Csub\u003EL\u003C\/sub\u003E) increases with pressures. Simulation explains this with the finding that at higher pressure, O\u003Csub\u003E3\u003C\/sub\u003E decomposition becomes a more dominant channel compared to other O\u003Csub\u003E3\u003C\/sub\u003E consumption pathways. This promotes the release of O atoms, which accelerates flame propagation. The positive relationship between enhancement and pressure makes O\u003Csub\u003E3\u003C\/sub\u003E addition an attractive technique for high-pressure applications. Regarding the dependence on initial temperature, simulation results show that adding O\u003Csub\u003E3\u003C\/sub\u003E at higher initial temperature is not as effective as that at lower initial temperature, as another O\u003Csub\u003E3\u003C\/sub\u003E consumption channel is favored at higher temperature. One can boost such enhancement in \u003Cem\u003ES\u003C\/em\u003E\u003Csub\u003EL\u003C\/sub\u003E by increasing O\u003Csub\u003E3\u003C\/sub\u003E concentration. A nearly linear relation between the enhancement and O\u003Csub\u003E3\u003C\/sub\u003E concentration is observed at room temperature and atmospheric pressure. If the fuel is changed from alkanes to C\u003Csub\u003E2\u003C\/sub\u003EH\u003Csub\u003E4\u003C\/sub\u003E, an unsaturated hydrocarbon species, ozonolysis reactions take place in the premixing process. When the heat released from ozonolysis reactions is lost, decrease in \u003Cem\u003ES\u003C\/em\u003E\u003Csub\u003EL\u003C\/sub\u003E is observed. In contrast, if ozonolysis reaction are frozen, either by cooling the reactants to or decreasing the pressure, and enhancement of \u003Cem\u003ES\u003C\/em\u003E\u003Csub\u003EL\u003C\/sub\u003E by O\u003Csub\u003E3\u003C\/sub\u003E addition has been observed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe study on flame stabilization with O\u003Csub\u003E3\u003C\/sub\u003E addition is conducted with a non-premixed jet burner in a quartz tube using C\u003Csub\u003E2\u003C\/sub\u003EH\u003Csub\u003E4\u003C\/sub\u003E as the fuel. At designed flow conditions, autoignition events are observed in such burner. Filtered chemiluminescence shows that the ozonolysis product, formaldehyde (CH\u003Csub\u003E2\u003C\/sub\u003EO), always accumulates before autoignition happens, which confirms that ozonolysis reactions initiate autoignition. The autoignition timescale is further investigated quantitatively. Overall, the relation between this timescale and inlet velocity is negative. Simulation models are built step by step to interpret this trend. At low Re, this trend is explained by the negative relation between mixing timescale and flow velocity at the present geometry. At high Re, it is attributed to the promoted mixing due to turbulence, which is further confirmed experimentally.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAt such autoignitive conditions created by ozonolysis reactions, the stabilization of a lifted non-premixed flame is fundamentally different from the classic ones. It is observed that the ability of a flame to be stabilized at high velocity flows is significantly enhanced. Two mechanisms are proposed to explain this. Firstly, the propagation is enhanced due to the \u0026ldquo;preprocessing\u0026rdquo; of fuel by ozonolysis reactions, after which the mass burning velocity of the reactants is increased as shown by simulation. This can increase the propagation by several times. Secondly, the conventional propagation process is circumvented as radicals are generated and thermal energy can be released locally, initiated by ozonolysis reactions. So the propagation is not solely controlled by the diffusion process, and autoignition kernels can be generated at the upstream of the existing combustion zone. This effectively moves the flame front at a speed of more than 100 times of \u003Cem\u003ES\u003C\/em\u003E\u003Csub\u003EL\u003C\/sub\u003E.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn summary, for the premixed laminar flame propagation, the present results explain the pressure, initial temperature, and fuel dependence of enhancement of flame propagation by O\u003Csub\u003E3\u003C\/sub\u003E addition. A more comprehensive understanding is thus contributed. As for the non-premixed jet, this dissertation provides data and analysis of ozonolysis-activated autoignition events and their enhancing effects on flame stabilization. This includes modeling the relation between the autoignition timescales and chemistry, mixing, and Reynolds number, and proposing two mechanisms that enhance flame stabilization. That is, ozonolysis i) pre-process the reactants to have higher mass burning velocity, and ii) circumvent the propagation by generating autoignition upstream of the original combustion zone.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA global pathway selection (GPS) algorithm is proposed in this work for the systematic generation of skeletal mechanisms. A 28-species mechanism is generated using this algorithm and applied in the 3D simulation of the non-premixed jet flames with O\u003Csub\u003E3\u003C\/sub\u003E addition. GPS is further extended to a hierarchical framework, Global Pathway Analysis (GPA), to understand the chemical kinetics. A demonstration is given by analyzing the second H\u003Csub\u003E2\u003C\/sub\u003E explosion limit.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Wenting Sun (AE)\u003Cbr \/\u003E\r\nDr. Jerry Seitzman (AE)\u003Cbr \/\u003E\r\nDr. Timothy Ombrello (AFRL)\u003Cbr \/\u003E\r\nDr. Lakshmi Sankar (AE)\u003Cbr \/\u003E\r\nDr. Jechiel Jagoda (AE)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cThe Effects of Ozone Addition on Flame Propagation and Stabilization\u201d"}],"uid":"33975","created_gmt":"2017-10-11 13:54:21","changed_gmt":"2017-10-11 13:54:21","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-24T14:15:00-04:00","event_time_end":"2017-10-24T16:00:00-04:00","event_time_end_last":"2017-10-24T16:00:00-04:00","gmt_time_start":"2017-10-24 18:15:00","gmt_time_end":"2017-10-24 20:00:00","gmt_time_end_last":"2017-10-24 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597163":{"#nid":"597163","#data":{"type":"event","title":"AE Presents: Dr. Timothy Ombrello from the Air Force Research Lab","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Timothy Ombrello \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESenior Research Aerospace Engineer\u003Cbr \/\u003E\r\nAerospace Systems Directorate\u003Cbr \/\u003E\r\nAir Force Research Laboratory \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Shifting the Paradigm of How Ignition is Approached in a Flowing Environment\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EOctober 24 @ 11:00 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstrac\u003C\/strong\u003Et:\u003Cbr \/\u003E\r\nIgnition success in real world combustion systems hinges upon multiple local and global parameters. From a global perspective, success is driven by the probability of ignition, as well as how \u0026ldquo;on demand\u0026rdquo; the system can respond. More succinctly, how to guarantee that ignition will always occur, and within the shortest time possible. These global parameters are of course governed by local factors, such as the fuel concentration, gas temperature, and velocity and turbulence levels, as well as the quantity of energy deposited, and the volume in which the energy is deposited. Because of all these parameters, energy deposition devices for ignition can be tailored to couple into and enhance the kinetic or fluid dynamic phenomena. The majority of this work has been focused on discrete ignition events where single pulses can be tailored for different levels of excitation or duration. While systems have been developed to pulse repetitively in a burst to increase the probability of ignition, each pulse remained discrete with no coupling between pulses.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ERecently, the switching technology in pulsed power systems has allowed for high voltage, high current, high-frequency repetitive pulsed systems to become a reality. The systems are capable of producing short duration pulses (~10 ns) with voltages in excess of 10 kV, at pulse repetition frequencies greater than 100 kHz. The time scale between pulses allows for a synergy between pulses on both fluid dynamic and kinetic time scales that changes the conventional understanding of how ignition is approached.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this talk, the application of nanosecond-pulsed high-frequency discharges to a range of reactive systems will be discussed; starting with ignition in a quiescent environment to provide a baseline understanding, and building up to ignition in a scramjet cavity-based flame holder. The primary metric for comparison is the total energy, but varying the rate of deposition (i.e. power). Global effects of ignition probability and kernel growth rates will be presented, as well as detailed measurements of temperature and intermediate species.\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETimothy Ombrello\u003C\/strong\u003E earned his Bachelor of Engineering in Mechanical Engineering from The Cooper Union for the Advancement of Science and Art in 2003, and his Ph.D. in Mechanical and Aerospace Engineering from Princeton University in 2009. Upon completing his graduate degree, he went on to work at the Air Force Research Laboratory, initially as a National Research Council Research Associate for one year before becoming a civilian employee. Currently he is a Senior Research Aerospace Engineer in the Aerospace Systems Directorate, predominately performing research related to high-speed air-breathing propulsions systems, specifically supersonic combustion ramjets. His research covers a wide range of fluid dynamic and combustion challenges, with strong collaborations across academia and industry. His interests lie in performing research and crafting techniques to enhance reactivity for more rapid ignition and more robust flame propagation and stabilization, from fundamental bench-top to supersonic wind tunnel experiments. His contributions thus far have allowed him to be a recipient of the Air Force Research Laboratory\u0026rsquo;s Early Career Award and Presidential Early Career Award for Scientists and Engineers (PECASE) from the White House.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHe serves as a guest editor for IEEE Transactions on Plasma Science and he is an Associate Fellow of the American Institute of Aeronautics and Astronautics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cShifting the Paradigm of How Ignition is Approached in a Flowing Environment\u201d"}],"uid":"33975","created_gmt":"2017-10-10 16:41:01","changed_gmt":"2017-10-10 16:41:01","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-24T12:00:00-04:00","event_time_end":"2017-10-24T13:00:00-04:00","event_time_end_last":"2017-10-24T13:00:00-04:00","gmt_time_start":"2017-10-24 16:00:00","gmt_time_end":"2017-10-24 17:00:00","gmt_time_end_last":"2017-10-24 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597160":{"#nid":"597160","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Chong Zhou","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EChong Zhou\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Lakshmi N Sankar)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Assessment of Tip Planform Effects on Hover and Forward Flight Aerodynamics of Helicopter Rotors\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday Oct. 13\u003Csup\u003Eth\u003C\/sup\u003E @ 10:00 a.m.\u003Cbr \/\u003E\r\nWeber Room 200\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAn Assessment of Tip Planform Effects on Hover and Forward Flight from physical point of view is proposed. Preliminary studies have already been completed to assess the effects of planform tip shape on hover performance. The flow field including sectional loads, tip vortex trajectories, and inflow velocity distributions will be examined to identify underlying physical phenomena that influence the previously documented changes to the rotor performance in hover.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFurthermore, all configurations considered in hover will be analyzed in forward flight at a specific advance ratio and shaft incidence angle representative of S-76 which is the baseline of the study, and the rotors will be trimmed for specified thrust values and zero hub moments. It would be examined whether configurations that are efficient in hover are also efficient in forward flight from an induced power and profile power perspective.\u0026nbsp; The sectional airloads and integrated hub loads will be analyzed to determine whether the changes to the tip shape favorably or adversely affect the vibratory loads.\u0026nbsp; Underlying physical phenomena (dynamic stall, blade vortex interaction, tip stall) will be identified.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Lakshmi N Sankar\u003Cbr \/\u003E\r\nProf. Daniel P Schrage\u003Cbr \/\u003E\r\nProf. Jonnalagadda V R Prasad\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAssessment of Tip Planform Effects on Hover and Forward Flight Aerodynamics of Helicopter Rotors\u201d"}],"uid":"33975","created_gmt":"2017-10-10 15:39:27","changed_gmt":"2017-10-10 15:39:27","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-13T11:00:00-04:00","event_time_end":"2017-10-13T12:30:00-04:00","event_time_end_last":"2017-10-13T12:30:00-04:00","gmt_time_start":"2017-10-13 15:00:00","gmt_time_end":"2017-10-13 16:30:00","gmt_time_end_last":"2017-10-13 16:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"597133":{"#nid":"597133","#data":{"type":"event","title":"M.S. Thesis Proposal:  Luke Battey","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EM.S. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ELuke Battey\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. L. Sankar)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Hybrid Navier-Stokes\/Vortex Particle Wake Methodology for Modeling Helicopter Rotors in Forward Flight and Maneuvers\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EOctober 20\u003Csup\u003Eth\u003C\/sup\u003E, 2017 @ 11:00 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight Room 325\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003Cbr \/\u003E\r\nManeuvering flight and high-speed flight are critical design points in any rotorcraft\u0026rsquo;s operating envelope. These conditions give complex flow phenomena, creating high stresses and vibrations. To accurately predict the flow properties over the relatively flexible rotor blades, coupling between computational fluid dynamics (CFD) and computational structural dynamics (CSD) is required.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, GT-Hybrid, a hybrid wake rotorcraft CFD code that is coupled to DYMORE, is used. A vortex particle method has been implemented in place of the existing lattice methodology. Results have been obtained for two forward flight simulations and are in good agreement with flight test and wind tunnel data.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIt is proposed that the GT-Hybrid solver with the vortex particle method be further evaluated by simulating three maneuvering flight conditions \u0026ndash; a pull-up maneuver, and two dive-turn maneuvers.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Lakshmi N. Sankar, Advisor\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003EDr. Daniel P. Shrage\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. J.V.R Prasad\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Hybrid Navier-Stokes\/Vortex Particle Wake Methodology for Modeling Helicopter Rotors in Forward Flight and Maneuvers\u201d"}],"uid":"33975","created_gmt":"2017-10-09 18:27:15","changed_gmt":"2017-10-09 18:27:15","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-20T12:00:00-04:00","event_time_end":"2017-10-20T13:00:00-04:00","event_time_end_last":"2017-10-20T13:00:00-04:00","gmt_time_start":"2017-10-20 16:00:00","gmt_time_end":"2017-10-20 17:00:00","gmt_time_end_last":"2017-10-20 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"133791","name":"aerospace enginering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"592336":{"#nid":"592336","#data":{"type":"event","title":"AE Presents: Paul Orkwis from the University of Cincinnati","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EPaul Orkwis\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDepartment Head and Professor of Aerospace Engineering and Engineering Mechanics\u003Cbr \/\u003E\r\nDepartment of Aerospace Engineering and Engineering Mechanics\u003Cbr \/\u003E\r\nUniversity of Cincinnati\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Development of an Implicit, Overset High-Order Discontinuous Galerkin Simulation Framework\u0026quot; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30pm\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe discontinuous Galerkin(DG) method for discretizing partial differential equations has been applied in many fields including acoustics, numerical weather predictions, and aerodynamics. Part of the strength of the method exists in its ability to provide arbitrary high-order accuracy, while maintaining a local computational stencil. The local scheme is attractive for use on unstructured grids but is also advantageous for Chimera\/Overset structured grids, where traditional challenges with overset schemes such as orphan nodes are eliminated. The ability to represent curved geometry also reduces discretization and interpolation error. The combination of high-order accuracy and straight-forward geometry representation and modification makes the Chimera\/Overset-DG discretization an attractive core capability for a framework enabling analysis, modeling, and design.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EResearchers at the University of Cincinnati Gas Turbine Simulation Laboratory have been driving sustained development of Chimera\/Overset-DG capabilities for several years. More recently, they have combined lessons learned from previous development efforts and created a software framework based on a core Chimera\/Overset-DG capability and thoughtful software engineering. The project is ChiDG: a Chimera-based discontinuous Galerkin framework. The framework is equipped with abstractions for many common components in numerical methods such as time-integrators, nonlinear\/linear solvers, and preconditioners so new developers do not have to reinvent the infrastructure and interactions between these components. Additionally, the framework takes a composition-based approach to representing equations. Abstractions exist for defining model coefficients, numerical operators, and composing equation sets from these components. From a software perspective, the framework is written in Modern Fortran(F90-2008), uses CMake and pFUnit to automate configure\/build\/test activities, and includes an intrinsic automatic differentiation capability to reduce developer burden when implementing new models. The project is open-source under the BSD 3-clause license and hosted on GitHub along with documentation(https:\/\/github.com\/nwukie\/ChiDG).\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe framework currently includes Newton-based nonlinear solvers with some globalization approaches for robustness, an FGMRES linear solver, a parallel ILU0 preconditioner, and Euler\/RANS equation sets with a Spalart-Allmaras turbulence model. Recent efforts on the ChiDG framework have included the addition of high-order implicit time-integrators along with a Harmonic Balance time-integrator for time-spectral problems. An Arbitrary Lagrangian Eulerian formulation was also added enabling problems with mesh motion or rotating\/translating coordinate systems. Current efforts on the ChiDG framework are focused on enabling capabilities for applied problems in external aerodynamics and turbomachinery as well as incorporating adjoint capabilities to drive design and optimization efforts. This talk will discuss the development of ChiDG and provide examples of its capability.\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EPaul D. Orkwis, Ph.D.\u003C\/strong\u003E is Interim Dean of the University of Cincinnati College of Engineering and Applied Science. He is also Professor of Aerospace Engineering and Engineering Mechanics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Orkwis received his B.A. in Mathematics from Dowling College in Oakdale, NY in 1983, and his M.S. and Ph.D. in Aerospace Engineering in 1987 and 1990 respectively from North Carolina State University in Raleigh, NC. Upon graduation Paul joined the faculty at UC. He has extensive experience working with the gas turbine industry via sabbaticals, consulting arrangements and membership in the GE Aviation University Strategic Alliance as well as long-term collaborative relationships with the U.S. Air Force Research Laboratory. His research includes application of CFD simulations for supersonic mixed compression inlets, combustor\/turbine hot streaks, cooling hole interactions, turbine purge cavities, compressor near-stall performance, weapons bay cavities, vortex asymmetry about cones, flow control devices and aeroacoustics.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Development of an Implicit, Overset High-Order Discontinuous Galerkin Simulation Framework\u0022"}],"uid":"33975","created_gmt":"2017-06-01 17:02:10","changed_gmt":"2017-10-09 17:33:40","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-26T16:30:00-04:00","event_time_end":"2017-10-26T17:30:00-04:00","event_time_end_last":"2017-10-26T17:30:00-04:00","gmt_time_start":"2017-10-26 20:30:00","gmt_time_end":"2017-10-26 21:30:00","gmt_time_end_last":"2017-10-26 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596860":{"#nid":"596860","#data":{"type":"event","title":"M.S. Thesis Proposal:  Christopher F. DeGraw","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EM.S. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EChristopher F. DeGraw\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor) Dr. Marcus Holzinger\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Massive Scale Hardware-in-the-Loop Simulation for Satellite Constellations and Other Multi-Agent Networks\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, October 16 @ 3:00 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGiven the plans for satellite mega-constellations, there is a lack of rigorously tested operations and control methods for constellations larger than 30 to 50 spacecraft. The purpose of this thesis is to propose the principles behind a robust, modular and scalable system able to provide software-in-the-loop (SWIL) and hardware-in-the-loop (HWIL) simulation capabilities for the advancement of formation and constellation system Technology Readiness Levels (TRL). Additionally, this thesis will develop a first-generation system demonstrating these principles called Constellation Simulation on a Massive Scale, or COSMoS.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe preliminary goals of COSMoS are to:\u003C\/p\u003E\r\n\r\n\u003Col\u003E\r\n\t\u003Cli\u003ESimulate 47 or more satellites in a constellation to demonstrate scalable capability\u003C\/li\u003E\r\n\t\u003Cli\u003EConnect to external hardware devices in real-time to demonstrate HWIL capability\u003C\/li\u003E\r\n\t\u003Cli\u003EConnect to the Space Systems Design Laboratory Mission Operations Center to demonstrate human interface capability\u003C\/li\u003E\r\n\u003C\/ol\u003E\r\n\r\n\u003Cp\u003ECurrently developing constellation automation capabilities include the implementation of control schemes using a Minimum Lyapunov Error approach developed by Dr. Marcus Holzinger and Dr. Jay McMahon, which will be one of the first algorithms tested on COSMoS. The system will also interact with flight-like and flight-ready hardware with the goal of testing experiment systems for SSDL flight missions and potentially increasing their TRL. Finally, it will also connect to the SSDL Operations Center to assist in the development of human-constellation interactions and ground controller training for SSDL flight missions.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cMassive Scale Hardware-in-the-Loop Simulation for Satellite Constellations and Other Multi-Agent Networks\u201d"}],"uid":"33975","created_gmt":"2017-10-03 14:10:20","changed_gmt":"2017-10-03 18:09:22","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-16T16:00:00-04:00","event_time_end":"2017-10-16T18:00:00-04:00","event_time_end_last":"2017-10-16T18:00:00-04:00","gmt_time_start":"2017-10-16 20:00:00","gmt_time_end":"2017-10-16 22:00:00","gmt_time_end_last":"2017-10-16 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596895":{"#nid":"596895","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Nandeesh Hiremath","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ENandeesh Hiremath\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Dr. Narayanan Komerath)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026ldquo;Vortex Aerodynamics of Rotors at High Advance Ratio\u0026rdquo;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EOctober 17, 2017, 2:00 - 4:00 p.m.\u003Cbr \/\u003E\r\nMontgomery Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ERotor operation at high advance ratio is important for high-speed and compound rotorcraft concepts. The operation of helicopter rotors in reverse flow has taken on new significance in the context of co-axial rotors. A rotor moving edgewise at a high advance ratio, encounters reverse flow on parts of the retreating portion of the rotor disc. Predicting rotor stability and pitch link loads is complicated by the presence of unsteady pitch, yaw and rotation effects. Predictions using comprehensive codes have shown large differences from full-scale experimental data. Prior approaches have modeled these using flow separation with airfoil data modified for yaw, vortex shedding, dynamic pitch oscillations and reverse dynamic stall of an airfoil. However, the highly 3-dimensional flow phenomena do not conform to approaches based on 2-dimensional airfoil aerodynamics. The present work delineates the nature of flow around a rotating blade in reverse flow by integrating the results from fixed wing experiments with rotating wing experiments. The work focuses on a strong 3D vortex similar to those seen on delta wings that would develop over the sharp edge at high yaw, providing an avenue for vortex lift aerodynamic analyses. The fixed wing and rotating wing experiments were performed on a tethered rotor blade with NACA0013 profile. Fixed-wing results from load measurements and flow visualization showed that the sharp-edge vortex (SEV) is a primary feature in reverse flow when the blade is yawed either forward or backward. The aerodynamic loads conform with analytical model using Polhamus Suction Analogy, thus showing significant contributions from vortex-induced lift and pitching moments\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn summary, it is apparent that the reverse flow regime should be modeled and analyzed as a case of SEV formation under the very sharply swept blade immediately after 180 degrees azimuth. The SEV evolves as the sweep decreases with increasing azimuth. In the regime before 240 degrees, an attached, strengthening SEV may be expected. At some moderate sweep (azimuth beyond 240 degrees in our case) the vortex bursts and detaches from the surface. Thereafter it convects with the blade, but induces strong pressure effects on the blade surface even as far as 300 degrees azimuth. 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He is currently a co-editor of the Aerospace Book Series of the Cambridge University Press (2010-).\u0026nbsp; A member of the U.S. National Academy of Engineering and an Academician of Academia Sinica, Dr. Yang is a fellow of the AIAA, ASME, and Royal Aeronautic Society (RAeS).\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Space Propulsion: Enabling the Future of Space Transportation and Exploration\u0022"}],"uid":"33975","created_gmt":"2017-09-18 20:14:25","changed_gmt":"2017-09-18 20:14:25","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-12T16:30:00-04:00","event_time_end":"2017-10-12T17:30:00-04:00","event_time_end_last":"2017-10-12T17:30:00-04:00","gmt_time_start":"2017-10-12 20:30:00","gmt_time_end":"2017-10-12 21:30:00","gmt_time_end_last":"2017-10-12 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596058":{"#nid":"596058","#data":{"type":"event","title":"DCL Presents:  Dr. Molei Tao","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EDr. Molei Tao\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, September 29, 2017\u003Cbr \/\u003E\r\n11:15am\u003Cbr \/\u003E\r\nTSRB Auditorium\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The Decision-Control Lab invites you to hear a talk by"}],"uid":"33975","created_gmt":"2017-09-18 14:09:42","changed_gmt":"2017-09-18 14:09:42","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-29T12:15:00-04:00","event_time_end":"2017-09-29T13:15:00-04:00","event_time_end_last":"2017-09-29T13:15:00-04:00","gmt_time_start":"2017-09-29 16:15:00","gmt_time_end":"2017-09-29 17:15:00","gmt_time_end_last":"2017-09-29 17:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596007":{"#nid":"596007","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Matthew Bopp","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMatthew Bopp\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. Stephen M. 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Larger aeroshells produce more drag, but the vehicle is then too large to fit as payload inside a rocket. By utilizing inflatable aerodynamic decelerators, the drag area can be significantly increased, while the pre-deployed configuration has high packing efficiency.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ENew technologies bring with them the requirement to study their behavior, and characterize their flight limits. Wind tunnel tests are difficult due to scaling concerns, and flight tests are costly and time consuming. Thus, accurate computational modeling of the fluid-structure interactions (FSI) is critical in the development of aerodynamic decelerators. Much of the current research in FSI focuses on high fidelity analysis, which is often very computationally expensive, and requires significant user intervention. The current work fills a mid-fidelity niche where the analysis time and human interaction is reduced, by utilizing an adaptive, Cartesian grid framework for solving the computational fluid dynamics (CFD).\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA time accurate, partitioned coupling strategy is employed to study FSI applied to flexible materials under high dynamic pressure loads. The structural dynamics is solved using LS-DYNA, and care must be taken at the interface boundary conditions to reduce numerical errors. The development of this tool has relied on a complete re-write of the in-house CFD code, NASCART-GT, where significant improvements have been made in computational efficiency and scalability. CFD simulations with prescribed motions are studied in order to validate the fluid dynamics of high speed flows with non-stationary boundary conditions, and to study the effects of solution-based grid adaption for these simulations. The interaction with rigid body dynamics is presented in simulations of the free flight dynamics of the MSL capsule. FSI simulations are then presented for a series of test cases, where the physics is validated for the unsteady, time accurate coupling of 1-D piston motion and 2-D beam deformation. Finally, steady state and time accurate simulations of an inflatable aerodynamic decelerator demonstrate the effectiveness of the current methodology in furthering the development of decelerator technologies.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Stephen M. Ruffin, Advisor (AE)\u003Cbr \/\u003E\r\nDr. Michael D. Barnhardt (NASA Ames)\u003Cbr \/\u003E\r\nDr. Julian J. Rimoli (AE)\u003Cbr \/\u003E\r\nDr. Lakshmi N. Sankar (AE)\u003Cbr \/\u003E\r\nDr. Marilyn J. Smith (AE)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022A Time Accurate Fluid-Structure Interaction Framework Using a Cartesian Grid CFD Solver\u0022"}],"uid":"33975","created_gmt":"2017-09-15 19:36:54","changed_gmt":"2017-09-15 19:36:54","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-21T14:00:00-04:00","event_time_end":"2017-09-21T16:00:00-04:00","event_time_end_last":"2017-09-21T16:00:00-04:00","gmt_time_start":"2017-09-21 18:00:00","gmt_time_end":"2017-09-21 20:00:00","gmt_time_end_last":"2017-09-21 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"596002":{"#nid":"596002","#data":{"type":"event","title":"DCL Presents: Dr. Jason Borenstein","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EThe Decision-Control Lab invites you to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ESelf-Driving Cars and Ethics: An Overview of Design Challenges\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Jason Borenstein\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, September 22\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E11:15 a.m.\u003Cbr \/\u003E\r\nTSRB Auditorium\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Talk:\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nEngineers are in the process of developing and deploying a broad range of vehicles with varying levels of autonomy. \u0026nbsp;As these vehicles start to appear on the roads more regularly, the importance of examining the extensive collection of ethical issues that could emerge becomes increasingly pressing.\u0026nbsp; Key ethical issues that warrant examination include potential \u0026ldquo;Trolley problems\u0026rdquo; and complexities associated with design decisions to take the human driver \u0026ldquo;out of the loop\u0026rdquo; from operating a vehicle.\u0026nbsp; Given how unpredictable interactions between human users and automated systems may be, engineers will need to work with various stakeholders in the effort to uphold public safety.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nJason Borenstein, Ph.D., is the Director of Graduate Research Ethics Programs and Associate Director of the Center for Ethics and Technology. His appointment is divided between the School of Public Policy and the Office of Graduate Studies. He is an assistant editor of the journal \u003Cem\u003EScience and Engineering Ethics\u003C\/em\u003E, co-editor of the \u003Cem\u003EStanford Encyclopedia of Philosophy\u0026rsquo;s Ethics and Information Technology\u003C\/em\u003E section, and an editorial board member of the journal \u003Cem\u003EAccountability in Research.\u003C\/em\u003E\u0026nbsp; He is also editor for Research Ethics for the National Academy of Engineering\u0026#39;s Online Ethics Center for Engineering and Science. Dr. Borenstein\u0026rsquo;s research interests include bioethics, engineering ethics, robot ethics, and research ethics. His work has appeared in numerous professional journals including \u003Cem\u003EAI \u0026amp; Society, Communications\u003C\/em\u003E of the ACM, \u003Cem\u003EScience and Engineering Ethics\u003C\/em\u003E, the \u003Cem\u003EJournal of Academic Ethics, Ethics and Information Technology\u003C\/em\u003E, \u003Cem\u003EIEEE Technology \u0026amp; Society, Accountability\u003C\/em\u003E in Research, and the \u003Cem\u003EColumbia Science and Technology Law Review\u003C\/em\u003E.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Borenstein will give a talk, \u0022Self-Driving Cars and Ethics: An Overview of Design Challenges\u0022"}],"uid":"27836","created_gmt":"2017-09-15 17:42:22","changed_gmt":"2017-09-15 17:42:22","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-22T12:00:00-04:00","event_time_end":"2017-09-22T13:00:00-04:00","event_time_end_last":"2017-09-22T13:00:00-04:00","gmt_time_start":"2017-09-22 16:00:00","gmt_time_end":"2017-09-22 17:00:00","gmt_time_end_last":"2017-09-22 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595975":{"#nid":"595975","#data":{"type":"event","title":"AE Presents: Dr. Dewey Hodges ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EYou are invited to hear\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Unified Approach for Accurate and Efficient Modeling of Composite Rotor Blade Dynamics\u0026rdquo;\u0026nbsp;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003E\u003Cem\u003Ea talk by\u003C\/em\u003E\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EProfessor Dewey Hodges\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E2014 Nikolsky Lecturer for the American Helicopter Society\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the lecture\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003EThe development of a unified approach is described, which spans several decades and facilitates accurate and efficient modeling of composite helicopter rotor blades for loads, dynamics, aeroelasticity, and stress recovery. The approach achieves accuracy comparable to that of three-dimensional finite element analysis but with significant savings in computational effort. The basis for this approach is a mathematical technique called the variational asymptotic method. This paper summarizes the modeling approach and presents some of the key equations of the resulting analyses. Examples are presented that illustrate the accuracy and efficiency of the approach as implemented in the computer application Variational Asymptotic Beam Section (VABS) and appropriate beam equations, along with ample citations to published works in which these analyses are developed and\/or used.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the speaker\u003C\/em\u003E\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cbr \/\u003E\r\nProf. Hodges has been on the faculty of the School of Aerospace Engineering at Georgia Tech since the fall of 1986. His present research interests include analytical and computational structural mechanics, aeroelasticity, structural dynamics, asymptotic methods, dynamics and computational optimal control. He has presented papers and seminars at many technical conferences and universities across the United States, Western Europe, South America, and Asia. He has advised 33 PhD and 39 MS graduates. To his credit thus far he has four book chapters, five books, over 200 technical papers in refereed journals, and two U.S. Patents. In recent years his research group at Georgia Tech has been developing methods for accurate analysis and stress recovery in composite beams (including helicopter rotor blades), plates, and shells. The computer programs VABS (for composite beams) and VAPAS (for composite plates and shells) are in use around the world. These codes facilitate the accurate modeling and accurate stress recovery of internally complex structural members using generalized forms of standard reduced-order models for beams, plates, and shells. Also, the code NATASHA was developed for nonlinear aeroelasticity analysis of HALE aircraft and was selected by DARPA for use by contractors in its VULTURE program.\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EProf. Hodges has received several awards in his professional career. These include his election to Fellow in four professional societies: The American Academy of Mechanics, The American Helicopter Society (AHS), The American Institute of Aeronautics and Astronautics (AIAA), and The American Society of Mechanical Engineers (ASME). In addition he has been awarded a NASA Technology Utilization Award (1975), two NASA Tech Brief Awards (1976 and 1990), a U.S. Army Commendation Medal (1977), the prestigious U.S. Army Research and Development Achievement Award (1979), the Director\u0026rsquo;s Award for Technological Achievement (1984), six Official U.S. Army Commendations (1980-1986), two SAIC Technical Paper Awards (1990 and 1998), three Sigma Xi Research Awards (1990, 1995, 2003), the Sigma Xi Sustained Research Award (2011), the AIAA Ashley Award for Aeroelasticity (2013), the AHS Alexander A. Nikolsky Honorary Lectureship (2014), and the ASME Spirit of St. Louis Medal (2015). He serves on the Editorial Boards of \u003Cem\u003EJournal of Mechanics of Materials and Structures\u003C\/em\u003E, the\u0026nbsp;\u003Cem\u003EJournal of Fluids and Structures\u003C\/em\u003E, and the journal\u0026nbsp;\u003Cem\u003ENonlinear Dynamics\u003C\/em\u003E. He also served as an Associate Editor for the \u003Cem\u003EAIAA Journal\u003C\/em\u003E, as a member of the AIAA Structural Dynamics Technical Committee, multiple terms as a member of the AHS Dynamics Committee, on the Editorial Board of the \u003Cem\u003EInternational Journal of Solids and Structures\u003C\/em\u003E, and as an associate editor of the \u003Cem\u003EJournal of Engineering Mechanics\u003C\/em\u003E.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Longtime AE professor will present the Nikolsky Lecture "}],"uid":"27836","created_gmt":"2017-09-15 00:16:01","changed_gmt":"2017-09-15 00:16:01","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-21T16:30:00-04:00","event_time_end":"2017-09-21T16:43:00-04:00","event_time_end_last":"2017-09-21T16:43:00-04:00","gmt_time_start":"2017-09-21 20:30:00","gmt_time_end":"2017-09-21 20:43:00","gmt_time_end_last":"2017-09-21 20:43:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"407841":{"id":"407841","type":"image","title":"Dr. Dewey Hodges","body":null,"created":"1449254168","gmt_created":"2015-12-04 18:36:08","changed":"1475895134","gmt_changed":"2016-10-08 02:52:14","alt":"Dr. Dewey Hodges","file":{"fid":"202162","name":"hodges-at-desk.jpg","image_path":"\/sites\/default\/files\/images\/hodges-at-desk.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/hodges-at-desk.jpg","mime":"image\/jpeg","size":119010,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/hodges-at-desk.jpg?itok=yOsipPTh"}}},"media_ids":["407841"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595949":{"#nid":"595949","#data":{"type":"event","title":"Doctoral Proposal: Farshad Shirani","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EFarshad Shirani\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisors: Professor Wassim M. Haddad and Professor Rafael de la Llave\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Mathematical Analysis of a Mean Field Model of Electroencephalographic Activity in the Neocortex\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E4:30 p.m., Tuesday, September 19, Montgomery Knight, Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe electroencephalographic recordings from the scalp are essential measures of mesoscopic electrical activity in the neocortex. Such spatio-temporal electrical activity can effectively be modeled using the mean field theory. The mean field model of the electroencephalogram developed by Liley \u003Cem\u003Eet al.\u003C\/em\u003E, 2002, is one of these models that has been widely used in the literature to study different patterns of rhythmic activity in the conscious and unconscious states of the brain. This model is presented as a system of coupled ordinary and partial differential equations with periodic boundary conditions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this doctoral thesis, this model is mathematically analyzed using the theory of partial differential equations and infinite-dimensional dynamical systems. Specifically, existence, uniqueness, and regularity of weak and strong solutions of the model are established in appropriate function spaces, and the associated initial-boundary value problems are proved to be well-posed. Moreover, sufficient conditions are developed for the phase spaces of the model to ensure nonnegativity of certain quantities, as required by their biophysical interpretation. Semidynamical system frameworks are established for the model and it is proved that the semigroups of weak and strong solution operators possess bounded absorbing sets for the entire range of biophysical values of the parameters of the model. Challenges towards establishing a global attractor for the model are discussed and it is shown that there exist parameter values for which the constructed semidynamical systems do not possess a compact global attractor due to the lack of the asymptotic compactness property. A bifurcation analysis is performed on a finite-dimensional approximation of the model with respect to variations in critical parameters of the model. The various emerging behaviors at each set of parameter values are qualitatively studied by numerically solving the equations of the model using finite element software packages. Finally, using the theoretical results developed in this thesis, instructive insights are provided into the complexity of the behavior of the model and computational analysis of the model.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProfessor Wassim M. Haddad, School of Aerospace Engineering, Georgia Institute of Technology\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Rafael de la Llave, School of Mathematics, Georgia Institute of Technology\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor John-Paul B Clarke, School of Aerospace Engineering, Georgia Institute of Technology\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Mathematical Analysis of a Mean Field Model of Electroencephalographic Activity in the Neocortex\u0022"}],"uid":"27836","created_gmt":"2017-09-14 16:33:34","changed_gmt":"2017-09-14 16:33:34","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-19T17:30:00-04:00","event_time_end":"2017-09-19T19:00:00-04:00","event_time_end_last":"2017-09-19T19:00:00-04:00","gmt_time_start":"2017-09-19 21:30:00","gmt_time_end":"2017-09-19 23:00:00","gmt_time_end_last":"2017-09-19 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"175528","name":"doctoral proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595861":{"#nid":"595861","#data":{"type":"event","title":"M.S. Thesis Proposal:  Andrew J. Greenhill","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EMasters Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAndrew J. Greenhill\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. Amy Pritchett\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Enhanced Flight Vision Systems: Presence of Runway Markings and Visibility Effects on Pilot Performance\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:00 AM, Friday, September 15\u003Csup\u003Eth\u003C\/sup\u003E, 2017\u003Cbr \/\u003E\r\nBradley Building\u003C\/strong\u003E\u003Cstrong\u003E, Bradley Conference Room\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis proposal defines a research plan to investigate the effects of visibility range and runway marking on pilot performance with enhanced flight vision systems. The motivation behind this experiment is to observe the implications of sensor technologies in general aviation. This research hopes to provide some insight into the possible concerns of enhanced flight vision systems with regards to pilot performance. The background section of this proposal describes some of the current sensor technologies in use today with enhanced flight vision systems (EFVS). The current sensors described are millimeter wave radar, forward-looking infrared and light detection and ranging; each of these sensors have capabilities and constraints that could affect the display shown to the pilot. In addition to sensor technologies, pilot visual cues and situational awareness is discussed. The objective of this research is twofold: first, find the effect, if any, the visibility range of an EFVS system affects the pilot performance on approach and landing. Secondly, find the effect that the absence of runway markings in EFVS has on the pilot performance during approach and landing. The approach that will be taken is to modify the visual cues presented to the pilot that directly affect the pilot\u0026rsquo;s performance and situational awareness. The visual cues were chosen since they have been shown to be used on approach and landing and can be directly related to current sensor technologies.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cEnhanced Flight Vision Systems: Presence of Runway Markings and Visibility Effects on Pilot Performance\u201d"}],"uid":"33975","created_gmt":"2017-09-13 15:33:04","changed_gmt":"2017-09-13 15:33:04","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-15T10:00:00-04:00","event_time_end":"2017-09-15T12:00:00-04:00","event_time_end_last":"2017-09-15T12:00:00-04:00","gmt_time_start":"2017-09-15 14:00:00","gmt_time_end":"2017-09-15 16:00:00","gmt_time_end_last":"2017-09-15 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595435":{"#nid":"595435","#data":{"type":"event","title":"AE Presents: Dr. David W. Hahn from the University of Florida","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EDavid W. Hahn\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProfessor and Department Chair\u003Cbr \/\u003E\r\nDepartment of Mechanical and Aerospace Engineering\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EUniversity of Florida\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30 p.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"You are invited to hear"}],"uid":"33975","created_gmt":"2017-09-01 17:03:33","changed_gmt":"2017-09-01 17:03:33","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-03-08T15:30:00-05:00","event_time_end":"2018-03-08T16:30:00-05:00","event_time_end_last":"2018-03-08T16:30:00-05:00","gmt_time_start":"2018-03-08 20:30:00","gmt_time_end":"2018-03-08 21:30:00","gmt_time_end_last":"2018-03-08 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595236":{"#nid":"595236","#data":{"type":"event","title":"AE Presents: Dr. Alexei Poludnenko from Texas A \u0026 M University","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAlexei Poludnenko\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDepartment of Aerospace Engineering\u003Cbr \/\u003E\r\nTexas A\u0026amp;M University\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Turbulent Combustion: From a Jet Engine to an Exploding Star\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESeptember 14 @ 11 am\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nTurbulent reacting flows are pervasive both in our daily lives on Earth and in the Universe. They power modern society being at the heart of many energy generation and propulsion systems, such as gas turbines, internal combustion and jet engines. At the same time, they also power the Universe through the energy produced in stellar interiors \u0026ndash; both quiescently, as in the Sun, and also violently, as in the most powerful explosions in the Universe known as Type Ia supernovae. Despite this ubiquity in Nature, turbulent reacting flows still pose a number of fundamental questions concerning their structure and dynamics often exhibiting surprising and unexpected behavior. In recent years, the advent of large-scale direct numerical simulations (DNS) has allowed the detailed exploration of the reacting flow dynamics in extreme, previously inaccessible regimes characterized by high flow speeds, significant compressibility effects, and strong coupling between exothermic reactions and the turbulent flow. Such combustion regimes are fundamental to the operation of many modern propulsion applications from scramjets to detonation-based engines. Furthermore, in certain cases these regimes can now be studied with remarkable realism using full-scale combustors, realistic fuels, and engine-relevant conditions. This talk will present an overview of a range of phenomena recently discovered in DNS of high-speed, premixed, turbulent reacting flows. These include intrinsic instabilities of reacting turbulence, onset of catastrophic transitions, e.g., spontaneous detonation formation, qualitative changes in the nature of the turbulent cascade in the presence of exothermic reactions, as well as the onset of distributed burning regimes at high turbulent intensities. I will discuss challenges presented by these findings both in the context of our theoretical understanding of reacting flows, and also in the context of modern modeling paradigms, such as Large Eddy Simulations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBio:\u003Cbr \/\u003E\r\nAlexei Poludnenko\u003C\/strong\u003E received his Bachelor degree in Physics and Mathematics from the National University \u0026ldquo;Kyiv-Mohyla Academy\u0026rdquo; in Kyiv, Ukraine, and Masters and Ph.D. degrees in Physics and Astronomy from the University of Rochester. Upon graduation, he joined the Department of Energy ASC Flash Center at the University of Chicago as a postdoctoral researcher. Subsequently, Dr. Poludnenko worked at the Naval Research Laboratory first as a National Research Council postdoctoral fellow and later as a permanent research staff member. Currently, he is an associate professor in the Department of Aerospace Engineering at the Texas A\u0026amp;M University. His research includes theoretical and computational studies of turbulent combustion in chemical and thermonuclear systems, numerical algorithm development for computational fluid dynamics, and high-performance computing. Dr. Poludnenko was a recipient of the Distinguished Paper Award at the 36\u003Csup\u003Eth\u003C\/sup\u003E International Symposium on Combustion, the 2016 Fran\u0026ccedil;ois Frenkiel Award for Fluid Mechanics of the American Physical Society Division of Fluid Dynamics, and the Alan Berman Research Publication Award of the US Naval Research Laboratory.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Turbulent Combustion: From a Jet Engine to an Exploding Star\u0022"}],"uid":"33975","created_gmt":"2017-08-29 17:53:10","changed_gmt":"2017-08-29 17:53:10","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-14T12:00:00-04:00","event_time_end":"2017-09-14T13:00:00-04:00","event_time_end_last":"2017-09-14T13:00:00-04:00","gmt_time_start":"2017-09-14 16:00:00","gmt_time_end":"2017-09-14 17:00:00","gmt_time_end_last":"2017-09-14 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595137":{"#nid":"595137","#data":{"type":"event","title":"AE Presents: Dr. Andrew Aspden from Newcastle University","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Andrew J. Aspden\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThermofluid\u003C\/strong\u003E\u003Cstrong\u003E Dynamics\u003Cbr \/\u003E\r\nNewcastle University\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;ADNS Perspective on the Turbulent Premixed Flame Regime Diagram\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday August 29 @ 2 p.m.\u003Cbr \/\u003E\r\nFood Processing Technology Building Auditorium\u003Cbr \/\u003E\r\nNARA complex\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nOver the last decade or so, three-dimensional Direct Numerical Simulation (DNS) with detailed chemistry has provided unique insight into the small-scale interactions between turbulence and premixed flames.\u0026nbsp; In this talk, a DNS perspective will be presented of the turbulent premixed flame regime diagram, primarily through canonical flame-in-a-box calculations.\u0026nbsp; Interpretation of the dimensionless groups will be considered, along with consequences for the demarcations between burning regimes.\u0026nbsp; Topics of particular focus will include the influence of Karlovitz number and the transition towards distributed burning, effects due to Lewis numbers of different species, and the response observed in chemical distribution.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBio:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Apsden joined Newcastle University in January 2017 as a Lecturer of Thermofluid Dynamics.\u0026nbsp; He obtained an MMath from the University of Oxford in 2002, followed by a PhD in Applied Mathematics from the University of Cambridge in 2006. He was awarded a Glenn T Seaborg Fellowship at the Lawrence Berkeley National Laboratory, where he was a member of the Center for Computational Sciences and Engineering for five years. Before joining Newcastle University, he was a Lecturer of Applied Mathematics at the University of Southampton, a Lecturer of Computational Fluid Dynamics at Cranfield University, and before that a Lecturer of Engineering Sciences at the University of Portsmouth. Andy\u0026#39;s research interests include analysis and simulation of fluid mechanics, turbulence, combustion, and type Ia supernovae.\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022ADNS Perspective on the Turbulent Premixed Flame Regime Diagram\u0022"}],"uid":"33975","created_gmt":"2017-08-28 17:09:36","changed_gmt":"2017-08-28 17:09:36","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-29T15:00:00-04:00","event_time_end":"2017-08-29T16:00:00-04:00","event_time_end_last":"2017-08-29T16:00:00-04:00","gmt_time_start":"2017-08-29 19:00:00","gmt_time_end":"2017-08-29 20:00:00","gmt_time_end_last":"2017-08-29 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595023":{"#nid":"595023","#data":{"type":"event","title":"AE Presents: \u0022Understanding Reacting Flows under Engine-Relevant Conditions:  Historical Trends \/ Recent Developments\u0022 ","body":[{"value":"\u003Cdiv\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EFokion N. Egolfopoulos\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWilliam E. Leonhard Professor \u003C\/strong\u003E\u003Cstrong\u003Ein\u003C\/strong\u003E\u003Cstrong\u003E Engineering\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EDepartment of Aerospace and Mechanical Engineering\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EUniversity of Southern California\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Understanding Reacting Flows under Engine-Relevant Conditions:\u0026nbsp; \u003C\/strong\u003E\u003Cstrong\u003EHistorical Trends and Some Recent Developments\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, October 5, 2017 @ 11:00 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nCombustion science is nearly 100 years old and major advances have been made since Nikolai Semenov determined in the 1920\u0026rsquo;s that \u0026ldquo;mechanisms of chemical reactions and in particular chain reactions\u0026rdquo; is essential towards the understanding of \u0026ldquo;combustion and explosion processes.\u0026rdquo;\u0026nbsp; Many believe that the most profound example of the contributions of combustion science remains the notable reduction of pollutant emissions since the 1970\u0026rsquo;s, which was achieved through the understanding of their formation mechanisms.\u0026nbsp; However, there are many open-ended questions regarding the relevance of the current state of combustion science to applications that operate at high pressures and temperatures in the presence of highly turbulent flows, and involve complex multicomponent liquid fuels.\u0026nbsp; In order to characterize with confidence the operational behavior and limits of engines after identifying the controlling mechanisms, the science that needs to be tackled is rather complicated under such extreme conditions and in many ways it appears to be a daunting task.\u0026nbsp; In this presentation, some issues will be discussed in the context of the engine-relevant thermodynamic and flow parameter space, and possible ways to move forward will be outlined through examples that are based on recent developments.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFokion N. Egolfopoulos \u003C\/strong\u003Eis a William E. Leonhard Professor of Engineering in the Department of Aerospace and Mechanical Engineering at the University of Southern California. \u0026nbsp;He obtained his Diploma degree in 1981 from the National Technical University of Athens, and his Ph.D. degree in 1990 from the University of California at Davis after having spent the last two years of his doctoral research at Princeton University. \u0026nbsp;\u0026nbsp;He was a recipient of the Silver Medal of the Combustion Institute at the Twenty-Second International Combustion Symposium.\u0026nbsp; He is a Fellow of the American Society of Mechanical Engineers (ASME) and an Associate Fellow of the American Institute of Aeronautics and Astronautics (AIAA).\u0026nbsp; Since January 2009 he is the co-Editor in Chief of Combustion and Flame, after having served as an Associate Editor of the journal from January 2003 until December 2008.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Prof. Fokion N. Egolfopoulos from the University of Southern California"}],"uid":"33975","created_gmt":"2017-08-25 13:00:51","changed_gmt":"2017-08-25 13:00:51","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-10-05T12:00:00-04:00","event_time_end":"2017-10-05T13:00:00-04:00","event_time_end_last":"2017-10-05T13:00:00-04:00","gmt_time_start":"2017-10-05 16:00:00","gmt_time_end":"2017-10-05 17:00:00","gmt_time_end_last":"2017-10-05 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"595017":{"#nid":"595017","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Timothy Edward Dawson","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D.\u0026nbsp;Thesis\u0026nbsp;Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETimothy Edward Dawson\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Vigor Yang)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Flame Response Modeling for Linear Stability Analysis of Staged-Combustion Rocket Engines\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, September 5\u003C\/strong\u003E\u003Cstrong\u003E\u003Csup\u003Eth\u003C\/sup\u003E\u003C\/strong\u003E\u003Cstrong\u003E, 2017 @ 1:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nRecent efforts led by the Air Force Research Laboratory (AFRL) aim to help transition US-based rocket manufacturing from conventional gas-generator cycle Liquid Rocket Engines (LREs), such as the Saturn V\u0026#39;s F-1 engine and Space Shuttle Main Engine (SSME), to higher performance closed-cycle designs such as the oxidizer-rich staged combustion (ORSC) cycle employed in many Russian-developed engines including the RD-180. Even as conventional LREs are being driven to higher chamber pressures to meet the requirements of next-generation payload delivery, combustion instabilities remain nearly impossible to predict \u003Cem\u003Ea priori\u003C\/em\u003E. These high-amplitude pressure oscillations become exceedingly dangerous as the energy density of the thrust chamber assembly (TCA) increases, leading to catastrophic structural failures and expensive engine testing programs. Bringing instability prediction on-line in the design process would both reduce costs and improve safety drastically, and one particularly promising avenue combines the robust modal analysis of a linearized acoustic solver with the detailed physics captured by high-fidelity simulations, providing a framework by which rapid prototyping of engine designs becomes computationally feasible.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe proposed research investigates a novel approach for modeling the response of TCA injectors to acoustic excitation, using Large Eddy Simulation (LES) to capture the detailed physics in turbulent reacting flowfields representative of full scale ORSC engines. Single element simulations will be conducted on both full and reduced computational domains, while reduced-domain multi-element simulations are proposed to specifically investigate proximity effects of both bordering elements and combustion chamber walls. Dynamic Mode Decomposition (DMD) is used to precompute the combustion response terms for incorporation into a COMSOL-based linearized acoustics model for rapid prediction of natural acoustic modes and their associated linear growth rates. Single and multi-element sub-scale ORSC experiments conducted by the Georgia Tech Combustion Lab and NASA Marshall Space Flight Center (MSFC) serve as benchmarks for both direct validation of the LES accuracy and demonstration of the predictive capabilities of the overall framework.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Vigor Yang (\u003Cem\u003EAdvisor\u003C\/em\u003E)\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Timothy Lieuwen\u003Cbr \/\u003E\r\nDr. Lakshmi Sankar\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cFlame Response Modeling for Linear Stability Analysis of Staged-Combustion Rocket Engines\u201d"}],"uid":"33975","created_gmt":"2017-08-25 12:48:07","changed_gmt":"2017-08-25 12:48:07","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-05T14:30:00-04:00","event_time_end":"2017-09-05T16:30:00-04:00","event_time_end_last":"2017-09-05T16:30:00-04:00","gmt_time_start":"2017-09-05 18:30:00","gmt_time_end":"2017-09-05 20:30:00","gmt_time_end_last":"2017-09-05 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594802":{"#nid":"594802","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Nick P. Breen","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ENick P. Breen\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Krish K. Ahuja)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Comparison Between Beamforming and Nearfield Contours for Source Location in Subsonic and Supersonic Jets of Various Geometries\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2:00 PM, Thursday, September 21, 2017\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight\u003C\/em\u003E\u003C\/strong\u003E\u003Cstrong\u003E\u003Cem\u003E, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nIn the context of aeroacoustics, source location refers to a methodology that allows identification of locations of noise sources of a given frequency in the noise-producing region of the flow. The need to understand and reduce aircraft noise emissions has led numerous researchers to apply various source location techniques to jet noise. There are a number of applications where the knowledge of the location of sources of various frequencies along the length of the jet is required. Prior to 1985, several methods for determining jet-noise source locations were explored: acoustic mirrors, microphone arrays, two microphone methods, causality correlation and coherence techniques, nearfield contour surveys, and automated source breakdown. More recently there have been developments in the microphone array, notably acoustic beamforming, and two microphone method techniques. Most of the older techniques, while they would successfully produce source location results, require significant amount of time to acquire data at each jet condition; this requirement is often caused by the necessity to move microphones, while the jet is running on condition, to obtain source locations at all frequencies. The acoustic beamformer, on the other hand, is not required to be moved during the acquisition of data, resulting in very rapid tests compared to most other source location methods.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; In this work, the acoustic beamformer is analyzed as a jet noise source location tool. This method is compared against nearfield noise contours, an older well-developed method for jet noise source location, to see how consistent the two methods are for a variety of subsonic and supersonic jet conditions. Preliminary results show that these two methods agree fairly well for subsonic jet conditions. This work also examines how the noise source distributions of subsonic jets change due to low Reynolds number effects and due to nozzle geometry. The effects of pressure ratio, both on and off design condition, on the supersonic jet noise sources are analyzed. The noise source distributions of round twin jets are examined as a function of Mach number and separation distance. Attempts are made to empirically model the above results. Schlieren flow visualization videos are used in tandem with source location, to better explain how the noise source distributions change.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cComparison Between Beamforming and Nearfield Contours for Source Location in Subsonic and Supersonic Jets of Various Geometries\u201d"}],"uid":"33975","created_gmt":"2017-08-22 18:49:09","changed_gmt":"2017-08-22 18:49:09","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-21T15:00:00-04:00","event_time_end":"2017-09-21T17:00:00-04:00","event_time_end_last":"2017-09-21T17:00:00-04:00","gmt_time_start":"2017-09-21 19:00:00","gmt_time_end":"2017-09-21 21:00:00","gmt_time_end_last":"2017-09-21 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594711":{"#nid":"594711","#data":{"type":"event","title":"Applications to work in the Aero Maker Space due TODAY","body":[{"value":"\u003Cp\u003EThe Daniel Guggenheim School of Aerospace Engineering\u0026#39;s\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Ca href=\u0022https:\/\/www.ae.gatech.edu\/aero-maker-space\u0022\u003E\u003Cstrong\u003EAero Maker Space\u003C\/strong\u003E\u003C\/a\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Eis seeking applications from qualified students to serve as trained staff for our facility, located in the Weber Building on the AE campus.\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EThe deadline to apply is August 22 at 11:59 p.m.\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003ETo apply, visit: \u003Ca href=\u0022https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSefCGIlDAT7f5dREAoU9DMgfQSSiAHP-qV686Wo3xsOjVzQ6g\/viewform?usp=sf_link\u0022 rel=\u0022noopener noreferrer\u0022 target=\u0022_blank\u0022\u003Ehttps:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSefCGIlDAT7f5dREAoU9DMgfQSSiAHP-qV686Wo3xsOjVzQ6g\/viewform?usp=sf_link\u003C\/a\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Students who want to work in the AE School\u0027s Maker Space have until Aug. 22 at 11:59 to apply"}],"uid":"27836","created_gmt":"2017-08-20 20:14:25","changed_gmt":"2017-08-20 20:14:25","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-22T01:00:00-04:00","event_time_end":"2017-08-22T01:00:00-04:00","event_time_end_last":"2017-08-22T01:00:00-04:00","gmt_time_start":"2017-08-22 05:00:00","gmt_time_end":"2017-08-22 05:00:00","gmt_time_end_last":"2017-08-22 05:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594710":{"#nid":"594710","#data":{"type":"event","title":"Undergrad Research Opportunities @ASDL","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EUndergraduate Engineering Students\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Eyou are invited to a \u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EInformation Session \u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EUndergraduate Research Opportunities at the Aerospace Systems Design Lab\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, August 22 @ 11 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\nWeber Building CoVE Auditorium,\u0026nbsp; 3rd floor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFind out about the opportunities available to get started with engineering research. Hundreds of engineers got their start at ASDL. You might be the next one.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Undergrads invited to this open house info session at the Aerospace Systems Design Lab"}],"uid":"27836","created_gmt":"2017-08-20 20:01:45","changed_gmt":"2017-08-20 20:02:45","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-22T12:00:00-04:00","event_time_end":"2017-08-22T13:00:00-04:00","event_time_end_last":"2017-08-22T13:00:00-04:00","gmt_time_start":"2017-08-22 16:00:00","gmt_time_end":"2017-08-22 17:00:00","gmt_time_end_last":"2017-08-22 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"175253","name":"undergraduate research opportunities"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594555":{"#nid":"594555","#data":{"type":"event","title":"Student Researchers Wanted for 2 Satellite Missions","body":[{"value":"\u003Cp\u003E\u0026nbsp;\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EStudents from multiple disciplines are invited to an information session for the\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETARGIT and RANGE Satellite Missions\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, August 22 @ 6 p.m.\u003Cbr \/\u003E\r\nGuggenheim 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EBring your resume!\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EA limited number of student research positions are available for two upcoming small-sat missions that are being run by AE Prof. Brian Gunter.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E1. The Ranging And Nanosatellite Guidance Experiment (RANGE)\u003C\/strong\u003E is a two-satellite formation that will complet e assembly in the Fall of 2017 and will launch and commence operations in the Spring of 2018.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2.\u0026nbsp; The Tethering And Ranging mission of the Georgia Institute of Technology (TARGIT)\u0026nbsp;\u003C\/strong\u003E is a NASA-sponsored cubesat project that will deploy and conduct 3D lidar imaging on an inflatable target while in orbit, with an expected launch date in 2019.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ELooking for:\u003C\/strong\u003E all majors \u0026amp; class ranks, esp. those interested in electronics, optics\/lasers, and programming\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMinimum Commitment:\u0026nbsp;\u003C\/strong\u003E 8 hrs\/wk, or 2 credit hours, in the lab\u003Cbr \/\u003E\r\n\u003Cstrong\u003EContact: \u003C\/strong\u003EProf. Brian Gunter \u003Ca href=\u0022mailto:brian.gunter@ae.gatech.edu\u0022\u003Ebrian.gunter@ae.gatech.edu\u003C\/a\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMore info: \u003C\/strong\u003E\u003Ca href=\u0022http:\/\/bgunter.gatech.edu\u0022\u003E\u003Cstrong\u003Ebgunter.gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003ENOTE:\u003C\/strong\u003E \u003Cem\u003EOnly US citizens or permanent residents may participate\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Students invited to Aug. 22 Info Session for the TARGIT and RANGE satellites"}],"uid":"27836","created_gmt":"2017-08-16 22:39:42","changed_gmt":"2017-08-16 22:39:42","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-22T19:00:00-04:00","event_time_end":"2017-08-22T20:00:00-04:00","event_time_end_last":"2017-08-22T20:00:00-04:00","gmt_time_start":"2017-08-22 23:00:00","gmt_time_end":"2017-08-23 00:00:00","gmt_time_end_last":"2017-08-23 00:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"169608","name":"satellites"},{"id":"56181","name":"researchers"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594554":{"#nid":"594554","#data":{"type":"event","title":"Career Information Session with Bell Textron","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to a\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ECareer Information Session\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Efeaturing recruiters from\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EBell Textron\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, September 13\u003Cbr \/\u003E\r\n5:30 - 7 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EGuggenheim Building of the School of Aerospace Engineering\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBring your resume and your A-game. There will be pizza and drinks provided.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EThis is sponsored by the Georgia Tech Chapter of the American Helicopter Society (AHS) and the Vertical Lift Research Center of Excellence (VLRCOE)\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EGraduate and undergraduate engineering students who are interested in careers with Bell Textron are invited to discuss their prospects with recruiters from the company. Refreshments provided.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Bell Textron Career Information Session"}],"uid":"27836","created_gmt":"2017-08-16 21:13:39","changed_gmt":"2017-08-16 21:13:39","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-09-13T18:30:00-04:00","event_time_end":"2017-09-13T20:00:00-04:00","event_time_end_last":"2017-09-13T20:00:00-04:00","gmt_time_start":"2017-09-13 22:30:00","gmt_time_end":"2017-09-14 00:00:00","gmt_time_end_last":"2017-09-14 00:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594438":{"#nid":"594438","#data":{"type":"event","title":"ASDL Presents: \u201cPerspectives from Saturn: Cassini\u2019s Two-Decade Exploration of the Ringed Planet and the Grand Finale\u201d","body":[{"value":"\u003Cdiv\u003E\u003Cstrong\u003EYou are invited to\u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Perspectives from Saturn: Cassini\u0026rsquo;s Two-Decade Exploration of the Ringed Planet and the Grand Finale\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003Ea talk by \u003C\/strong\u003E\u003C\/div\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMichael Staab, M.S. 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Gorton","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EDr. Susan A. Gorton\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProject Manager\u003Cbr \/\u003E\r\nNASA Revolutionary Vertical Lift Technology\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003ENASA Langley Research Center\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30 p.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDetails TBA\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"You are invited to hear"}],"uid":"33975","created_gmt":"2017-08-15 14:23:29","changed_gmt":"2017-08-15 14:23:29","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-11-28T15:30:00-05:00","event_time_end":"2017-11-28T16:30:00-05:00","event_time_end_last":"2017-11-28T16:30:00-05:00","gmt_time_start":"2017-11-28 20:30:00","gmt_time_end":"2017-11-28 21:30:00","gmt_time_end_last":"2017-11-28 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"594035":{"#nid":"594035","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Matthew J. Miller","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMatthew J.\u0026nbsp;Miller\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Karen Feigh)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:00am, Monday, August 14th, 2017\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EGT Library (ground floor west), Wilby Room\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Decision Support System Development for \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EHuman Extravehicular Activity\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHuman spaceflight is arguably one of mankind\u0026#39;s most challenging engineering feats, requiring carefully crafted synergy between human and technological capabilities. One critical component of human spaceflight pertains to the activity conducted outside the safe confines of the spacecraft, known as Extravehicular Activity (EVA). Successful execution of EVAs requires significant effort and real-time communication between astronauts who perform the EVA and the ground personnel who provide real-time support. As NASA extends human presence into deep space, the time delay associated with communication between the flight crew and Earth-bound support crew will cause a shift from real-time to delayed communication. A decision support system (DSS) is one possible solution to enhance astronauts\u0026rsquo; capability to identify, diagnose, and recover from time critical irregularities during EVAs without relying on real-time ground support.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe contributions of this thesis are two fold. The first is domain specific and addresses the known deficiencies that will impact future human EVA operations. The second is methodological and generalizable across many domains. This thesis demonstrates that Cognitive Work Analysis (CWA) can be applied to yield design insight in the form of high level design requirements amenable to traditional systems engineering. Beginning with the first two phases of CWA, a broad work domain analysis of EVA is made to identify the system constraints on EVA operations. Subsequently, Control Task Analysis models were developed that yielded a set of DSS design requirements in the form of cognitive work and information relationship requirements which reflect the underlying states of knowledge associated with supporting EVA operations. Furthermore, this thesis demonstrates how a subset of those requirements, along side envisioning and testing within a future work context, can yield prototype DSS designs suitable for supporting future EVA operations. Finally, this thesis included a human-subject study to evaluate the resultant prototypes against the requirements to demonstrate both validity of the requirements and the verification of the design. As a result, this thesis contributes the underlying science needed to design a DSS within the EVA work domain for future mission operations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Karen M. Feigh (Advisor, AE)\u003Cbr \/\u003E\r\nProf. Amy R. Pritchett (AE)\u003Cbr \/\u003E\r\nProf. David A. Spencer (AE)\u003Cbr \/\u003E\r\nDr. Ute M. Fischer (LMC)\u003Cbr \/\u003E\r\nDr. Kerry M. McGuire (NASA JSC)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cDecision Support System Development For  Human Extravehicular Activity\u201d"}],"uid":"33975","created_gmt":"2017-08-03 14:26:50","changed_gmt":"2017-08-03 14:26:50","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-14T10:00:00-04:00","event_time_end":"2017-08-14T12:00:00-04:00","event_time_end_last":"2017-08-14T12:00:00-04:00","gmt_time_start":"2017-08-14 14:00:00","gmt_time_end":"2017-08-14 16:00:00","gmt_time_end_last":"2017-08-14 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593844":{"#nid":"593844","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Lee Whitcher","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ELee Whitcher\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Eric N. Johnson)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, August 7th, 2017 @ 9am\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery-Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Design Considerations for the Control and Performance Optimization of a VTOL UAV Using the Coanda Effect\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe Coanda effect is a phenomenon of fluid dynamics whereby a jet exhibits a strong tendency to become attached to, and flow around, a nearby surface. Vertical Takeoff and Landing (VTOL) Unmanned Aerial Vehicles (UAVs) utilizing the Coanda effect for lift generation have a number of potential benefits, including: (a) the creation of a large aerodynamically-neutral payload\/systems bays, (b) a high payload-carrying ability for its size, and (c) the use of an enclosed rotor, enabling it to withstand contact with its surroundings.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECoanda effect UAVs have undergone some study, but remain a largely under-investigated and certainly un-optimized VTOL configuration. This proposed research aims to address this by:\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EDeveloping a physics-based model for the aircraft\u0026rsquo;s flight dynamics\u003C\/li\u003E\r\n\t\u003Cli\u003EDeveloping a robust flight controller for hover and low-speed flight\u003C\/li\u003E\r\n\t\u003Cli\u003EDeveloping analytical and numerical methods to predict performance characteristics\u003C\/li\u003E\r\n\t\u003Cli\u003EIncorporating this knowledge into an optimization strategy for maximizing the aircraft\u0026rsquo;s potential as a safer VTOL UAV for use in urban and otherwise challenging environments\u003C\/li\u003E\r\n\t\u003Cli\u003EValidating all of the above works with experimental data gained from static and flight tests\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Eric N. Johnson, \u003Cem\u003ESchool of Aerospace Engineering, Georgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. Daniel P. Schrage, \u003Cem\u003ESchool of Aerospace Engineering, Georgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. J.V.R. Prasad, \u003Cem\u003ESchool of Aerospace Engineering, Georgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. Magnus Egerstedt, \u003Cem\u003ESchool of Aerospace Engineering, Georgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. Tony J. Dodd, \u003Cem\u003EDept.of Automatic Control and Systems Engineering, University of Sheffield (UK)\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. Suraj Unnikrishnan, \u003Cem\u003ELockheed Martin Sikorsky\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cDesign Considerations for the Control and Performance Optimization of a VTOL UAV Using the Coanda Effect\u201d"}],"uid":"33975","created_gmt":"2017-07-31 13:21:33","changed_gmt":"2017-07-31 13:22:20","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-08-07T10:00:00-04:00","event_time_end":"2017-08-07T12:00:00-04:00","event_time_end_last":"2017-08-07T12:00:00-04:00","gmt_time_start":"2017-08-07 14:00:00","gmt_time_end":"2017-08-07 16:00:00","gmt_time_end_last":"2017-08-07 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593671":{"#nid":"593671","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Kyuman Lee","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EKyuman Lee \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Professor Eric N. Johnson) \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Adaptive Filtering for Vision-Aided Inertial Navigation\u0026rdquo; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E3:00 p.m. Wednesday, July 26, 2017 \u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp; \u003C\/strong\u003E\u003Cbr \/\u003E\r\nWith the advent of unmanned aerial vehicles (UAVs), a major area of interest in the research field of UAVs has been vision-aided inertial navigation systems (V-INS). Many missions of UAVs\u0026mdash;reconnaissance, damage assessment, exploration, and other guidance, navigation, and control (GNC) tasks\u0026mdash;often demand V-INS in more operational environments such as indoors, hostilities, and disasters. In V-INS, inertial measurement unit (IMU) dead reckoning generates the dynamic models of UAVs, and vision sensors extract information about the surrounding environment and determine features or points of interest. With these sensors, the most widely used algorithm for estimating vehicle and feature states of V-INS is an extended Kalman filter (EKF). The design of the standard EKF does not inherently allow for time offsets between the timestamps of the IMU and vision data, and the necessary assumption of the EKF is Gaussian and white noise. In fact, sensor-related delays, correlations of noise, or outliers that arise in various realistic conditions are unknown parameters. A lack of compensation of unknown parameters leads to a serious impact on the accuracy of the navigation systems. To compensate for uncertainties of the parameters, we require modified versions of the estimator or the incorporation of other techniques into the filter.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe main purpose of this thesis is to develop adaptive and robust V-INS for UAVs, in particular, those for situations pertaining to such unknown parameters. First, to fuse measurements with unknown time delays, this study incorporates parameter estimation and constrained filtering into state estimation. In addition, we use machine-learning techniques (e.g., the kernel embedding of distributions) to handle unknown correlations and dependences of each noise source. Unfortunately, few researchers have treated correlated noise in V-INS in great detail. Finally, typicality and eccentricity data analysis (TEDA) detects the real-time outliers of the IMU and vision data, and variational approximation for Bayesian inference derives how to compute the optimal precision matrices of both propagation and measurement outliers. Results from both Monte Carlo simulation and flight testing validate the improved accuracy and reliability of V-INS employing these adaptive filtering frameworks.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Eric N. Johnson (Advisor), School of Aerospace Engineering\u003Cbr \/\u003E\r\nProf. Eric Feron, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProf. E. Glenn Lightsey, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProf. Marcus J. Holzinger, School of Aerospace Engineering\u003Cbr \/\u003E\r\nProf. Byron Boots, School of Interactive Computing\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAdaptive Filtering for Vision-Aided Inertial Navigation\u201d "}],"uid":"33975","created_gmt":"2017-07-24 14:11:15","changed_gmt":"2017-07-24 14:11:15","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-26T16:00:00-04:00","event_time_end":"2017-07-26T18:00:00-04:00","event_time_end_last":"2017-07-26T18:00:00-04:00","gmt_time_start":"2017-07-26 20:00:00","gmt_time_end":"2017-07-26 22:00:00","gmt_time_end_last":"2017-07-26 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593572":{"#nid":"593572","#data":{"type":"event","title":"Doctoral Defense: Matthew Clay","body":[{"value":"\u003Cp\u003E\u003Cem\u003EYou are invited to a\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003EDoctoral Defense by\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Ch2\u003E\u003Cstrong\u003EMatthew Clay\u003C\/strong\u003E\u0026nbsp;\u003C\/h2\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003E11\u003C\/strong\u003E\u003Cstrong\u003Ea.m., Tuesday, July 25\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMRDC Building\u003C\/strong\u003E\u003Cstrong\u003E\u0026nbsp; -- \u003C\/strong\u003E\u003Cstrong\u003ERoom 4211\u003C\/strong\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Ch1\u003E\u003Cstrong\u003ES\u003C\/strong\u003E\u003Cstrong\u003Etrained Turbulence and Low-diffusivity Turbulent Mixing\u0026nbsp;\u003C\/strong\u003E\u003Cstrong\u003E \u003C\/strong\u003E\u0026nbsp;\u003C\/h1\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EIn this thesis, turbulent flows are studied using the method of direct numerical simulation (DNS), whereby exact governing equations are computed without modeling. Beginning with isotropic turbulence and turbulent mixing under axisymmetric contraction, comparisons with experiments are made by directly modeling strain rates from wind tunnel facilities in the DNS. The simulations reproduce key findings from the experiments for the evolution of the one-dimensional component velocity spectra, which are strongly influenced by spectral transfer and pressure-strain mechanisms following the contraction. For simulations of low-diffusivity (i.e., high Schmidt number) turbulent mixing in isotropic turbulence, the increased resolution requirements of the Batchelor scales are addressed by adopting a dual-grid dual-scheme numerical approach. The one-way coupling of the velocity and passive scalar fields, along with their disparate resolution requirements at high Schmidt number are exploited in the design of the parallel code by computing each field separately in disjoint message passing communicators. Good scalability of the code up to O(105) cores on machines at multiple national supercomputer centers is achieved by overlapping communication and computation through extensive use of shared-memory programming, both in homogeneous and heterogeneous (i.e., GPU-accelerated) computing environments. Simulations of passive scalars maintained under a uniform mean gradient in forced isotropic turbulence are conducted with grid resolution up to 81923 for a scalar of Schmidt number 512, which is comparable to salinity mixing in the ocean. The results give strong support to the emergence of Batchelor scaling in the scalar spectrum and an approach toward local isotropy with increasing Schmidt number.\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u003C\/strong\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EProf. P. K. Yeung (AE\/ME)\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProf. C. K. Aidun (ME)\u003C\/li\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Cp\u003EProf. D. Ranjan (ME\/AE)\u0026nbsp;\u003C\/p\u003E\r\n\t\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProf. M. J. Smith (AE)\u0026nbsp;\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProf. E. Chow (CSE)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Strained Turbulence and Low-diffusivity Turbulent Mixing"}],"uid":"27836","created_gmt":"2017-07-18 21:52:00","changed_gmt":"2017-07-18 21:52:00","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-25T12:00:00-04:00","event_time_end":"2017-07-25T14:30:00-04:00","event_time_end_last":"2017-07-25T14:30:00-04:00","gmt_time_start":"2017-07-25 16:00:00","gmt_time_end":"2017-07-25 18:30:00","gmt_time_end_last":"2017-07-25 18:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593554":{"#nid":"593554","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Matthew Gross","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMatthew Gross\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. Mark Costello\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Smart Projectile Parameter Estimation Using \u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMeta-Optimization\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, July 31, 2017 @ 1 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery-Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; System identification and parameter estimation are valuable tools in the analysis and design of smart projectile systems.\u0026nbsp; Given the complexity of these systems, it is convenient to work with mathematical models in place of the actual system.\u0026nbsp; Parameter estimation uses time history data of the system to determine a model that accurately matches the data.\u0026nbsp; Many techniques have been developed to perform parameter estimation, including regression methods, maximum likelihood estimators, and Kalman filters.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Maximum likelihood methods, in particular the output error method (OEM), pose the estimation problem in terms of an optimization problem.\u0026nbsp; OEM has seen extensive use on projectile systems, utilizing a numerical optimizer such as a Newton style algorithm to solve for unknown parameters.\u0026nbsp; These algorithms are prone to converging on local minima present in the projectile dynamics, requiring reasonable initial guesses of the parameters to ensure convergence.\u0026nbsp; However, for new smart projectile systems, prior estimates of the control parameters may not be available.\u0026nbsp; Thus, there is a need for reliable and robust parameter estimation methods that are not dependent a priori knowledge of the parameters.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This thesis proposes a new method for smart projectile parameter estimation based on OEM.\u0026nbsp; To achieve robust and reliable parameter estimates, a new underlying optimization algorithm is formed dubbed meta-optimization.\u0026nbsp; Meta-optimization employs a diverse set of individual optimization algorithms with both local and global search capabilities.\u0026nbsp; The meta-optimizer operates by iteratively selecting a single algorithm to deploy in a stochastic manner, giving preference to algorithms which have performed well on the problem.\u0026nbsp; This approach allows synergies to develop between the individual optimizers, boosting performance beyond what each optimizer is capable of individually.\u0026nbsp; A suite of benchmark functions are used to analyze the meta-optimization framework and compare it to other existing algorithms.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The new parameter estimation method is applied to an example smart projectile system equipped with a new control mechanism.\u0026nbsp; Both synthetic and experimental trajectory data is used to evaluate the effective of the proposed method.\u0026nbsp; For the standard projectile and a smart projectile executing a maneuver, the method obtains good estimates of the parameters for this system in the presence of measurement noise.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Mark Costello, AE (Advisor)\u003Cbr \/\u003E\r\nDr. Brian German, AE\u003Cbr \/\u003E\r\nDr. Eric Johnson, AE\u003Cbr \/\u003E\r\nDr. Graeme Kennedy, AE\u003Cbr \/\u003E\r\nDr. Aldo Ferri, ME\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cSmart Projectile Parameter Estimation Using  Meta-Optimization\u201d"}],"uid":"33975","created_gmt":"2017-07-18 12:58:32","changed_gmt":"2017-07-18 17:22:49","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-31T14:00:00-04:00","event_time_end":"2017-07-31T16:00:00-04:00","event_time_end_last":"2017-07-31T16:00:00-04:00","gmt_time_start":"2017-07-31 18:00:00","gmt_time_end":"2017-07-31 20:00:00","gmt_time_end_last":"2017-07-31 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593563":{"#nid":"593563","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Nishant Jain","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ENishant Jain\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Jerry M. Seitzman)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u0026ldquo;Combustion and Flow Characteristics of Staged Combustors with Multiple Large Jets in Confined Crossflow\u0026rdquo;\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, July 24, 2017, 11 a.m.-12:00 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight building, Conference room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nStaged combustion offers many advantages in high performance aero-propulsion and power generation applications that demand increasingly robust gas turbine engines with reduced emissions. Air-staged combustors primarily rely upon rapid mixing and rapid combustion which occurs in a confined environment with multiple large jets carrying significant amounts of mass and momentum into a high temperature vitiated crossflow. The proposed thesis focuses on elucidating the mixing and combustion processes under conditions relevant to applications in non-premixed (Rich-Quench-Lean, RQL) and premixed (Lean-Quench-Lean, LQL) staged combustors. To this effect, experimental and analytical investigations will be performed in a simplified atmospheric laboratory setup using geometries, air split ratios, jet configurations and other flow parameters that are relevant to practical applications.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWith the goal of determining mixing and flow field characteristics that are unique to highly confined multiple jets in crossflow, high speed planar and stereo PIV techniques will be employed. The thesis will examine the impact of jet-jet and jet-wall interactions on mixing for two jet configurations, namely, parallel jets and staggered-opposed jets. Moreover, high speed OH* chemiluminescence imaging of highly confined reacting jets in a high temperature, vitiated crossflow will be performed to understand the controlling flame characteristics such as flame stabilization mechanisms, liftoff height and burnout distance. Reduced order chemical kinetic modeling (e.g., autoignition and consumption-based flame speed analysis) will also be used to interpret the results obtained from the flame measurements. Essentially, the temporally and spatially resolved velocity and mixing results will be used together with the high speed chemiluminescence and reduced order modeling to investigate the interplay of flow and combustion characteristics in staged combustion architectures.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProposal committee members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Jerry M. Seitzman (advisor)\u003Cbr \/\u003E\r\nDr. Jechiel I. Jagoda\u003Cbr \/\u003E\r\nDr. Timothy C. Lieuwen\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cCombustion and Flow Characteristics of Staged Combustors with Multiple Large Jets in Confined Crossflow\u201d"}],"uid":"33975","created_gmt":"2017-07-18 17:21:59","changed_gmt":"2017-07-18 17:21:59","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-24T12:00:00-04:00","event_time_end":"2017-07-24T13:00:00-04:00","event_time_end_last":"2017-07-24T13:00:00-04:00","gmt_time_start":"2017-07-24 16:00:00","gmt_time_end":"2017-07-24 17:00:00","gmt_time_end_last":"2017-07-24 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"593409":{"#nid":"593409","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Andrew T. Bellocchio","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAndrew T. Bellocchio\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Daniel Schrage,)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Balancing Maintenance Free Operating Period Rotorcraft with Cost Capability Analysis\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2:00 pm, Friday, July 28, 2017\u003Cbr \/\u003E\r\nWeber SST III, Collaborative Visualization Environment (CoVE)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor the past 50 years, the paradigm of on-condition rotorcraft maintenance has yielded to random failures and subsequent unscheduled maintenance that regularly disrupt flight operations.\u0026nbsp; The British Ultra-Reliable Aircraft Pilot Program of the late 1990s introduced the paradigm of Maintenance Free Operating Period (MFOP) as a solution. \u0026nbsp;An MFOP aircraft is a fault tolerant, highly reliable system that minimizes disruptive failures for an extended period of operations.\u0026nbsp; After the MFOP, a single Maintenance Recovery Period (MRP) consolidates the repair of accrued faults and inspections in order to restore aircraft\u0026rsquo;s reliability for the next MFOP cycle.\u0026nbsp; An MFOP strategy provides assurance to the user that flight operations will continue without disruption for the duration of the MFOP at a given survivability rate.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe U.S. Department of Defense recently adopted MFOP as its maintenance strategy for the next generation of rotorcraft named the Future Vertical Lift (FVL) Family of Systems.\u0026nbsp; The U.S. military desires uninterrupted flight operations to enable a more expeditionary force that operates from remote, austere bases.\u0026nbsp; An initial goal of a 100-flight hour MFOP at 90% availability will be necessary to support such deployments; yet, today\u0026rsquo;s fleet has the system reliability to fly less than ten hours without significant repair at 75% availability.\u0026nbsp; Beyond FVL, the military desires to transition to near-zero maintenance with an MFOP between 480 hours and 720 hours.\u0026nbsp; The challenge presented is to achieve an order of magnitude improvement to meet the FVL target and set the conditions for near-zero maintenance while still remaining affordable.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe goal of the proposed research is to measure the balance between capability, availability, dependability, and life cycle cost of an MFOP rotorcraft.\u0026nbsp; It will utilize a Petri net-like state space in an integrated Discrete Event Simulation to model the MFOP, MRP, and their survivability as operational metrics.\u0026nbsp; The work will identify which subsystem(s) limit the MFOP of an aircraft and which components drive MRP higher.\u0026nbsp; It will explore the relationship between MFOP and MRP as well as their cost and vehicle performance implications.\u0026nbsp; It will test the hypothesis that an operational commander has some control over MFOP by varying the MRP through an aggressive lifing policy.\u0026nbsp; Ultimately, the work will demonstrate an application of Cost Capability Analysis to inform decision makers on vehicle design and technology trade decisions in a near-zero maintenance context.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members: \u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Daniel Schrage, Advisor\u003Cbr \/\u003E\r\nProf. Dimitri Mavris\u003Cbr \/\u003E\r\nDr. Vitali Volovoi\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cBalancing Maintenance Free Operating Period Rotorcraft with Cost Capability Analysis\u201d"}],"uid":"33975","created_gmt":"2017-07-10 18:32:57","changed_gmt":"2017-07-10 18:32:57","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-28T15:00:00-04:00","event_time_end":"2017-07-28T17:00:00-04:00","event_time_end_last":"2017-07-28T17:00:00-04:00","gmt_time_start":"2017-07-28 19:00:00","gmt_time_end":"2017-07-28 21:00:00","gmt_time_end_last":"2017-07-28 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"592589":{"#nid":"592589","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Michael X. Grey","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMichael X. Grey\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Prof. Karen C. Liu)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday,\u0026nbsp;June\u0026nbsp;20th, 2017 @ 12:00pm EDT\u003Cbr \/\u003E\r\nTechnology Square Research Building (TSRB) 222\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;\u003C\/strong\u003E\u003Cstrong\u003EHigh Level Decomposition for Bipedal Locomotion Planning\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nLegged robotic platforms offer an attractive potential for deployment in hazardous scenarios that would be too dangerous for human workers. Legs provide a robot with the ability to step over obstacles and traverse steep, uneven, or narrow terrain. Such conditions are common in dangerous environments, such as a collapsing building or a nuclear facility during a meltdown. However, identifying the physical motions that a legged robot needs to perform in order to move itself through such an environment is particularly challenging. A human operator may be able to manually design such a motion on a case-by-case basis, but it would be inordinately time-consuming and unsuitable for real-world deployment.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis thesis presents a method to decompose challenging large-scale motion planning problems into a high-level planning problem and a set of parallel low-level planning problems. We apply the method to quasi-static bipedal locomotion planning. The method is tested in a series of simulated environments that are designed to reflect some of the challenging geometric features that a robot may face in a disaster scenario. We analyze the improvement in performance that is provided by the high- and low-level decomposition, and we show that completeness is not lost by this decomposition.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. C. Karen Liu (Advisor), School of Interactive Computing, Georgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Aaron D. Ames (Advisor), Mechanical and Civil Engineering \u0026amp; Control and Dynamical Systems, California Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Magnus\u0026nbsp;Egerstedt, School of Electrical and Computer Engineering, Georgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Kris Hauser, Department of Electrical and Computer Engineering \u0026amp; Department of Mechanical Engineering and Computer Science\u0026nbsp;\u0026amp; Department of Computer Science, Duke University\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Matt Zucker, Engineering Department, Swarthmore University\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cHigh Level Decomposition for Bipedal Locomotion Planning\u201d"}],"uid":"33975","created_gmt":"2017-06-12 13:21:03","changed_gmt":"2017-06-12 13:21:03","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-06-20T13:00:00-04:00","event_time_end":"2017-06-20T15:00:00-04:00","event_time_end_last":"2017-06-20T15:00:00-04:00","gmt_time_start":"2017-06-20 17:00:00","gmt_time_end":"2017-06-20 19:00:00","gmt_time_end_last":"2017-06-20 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"592418":{"#nid":"592418","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Shane V. Lympany","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EShane V. Lympany\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Krish K. Ahuja)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Acoustic Damping Mechanisms of Propellant Injectors\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, June 23, 2017 @ 10:00 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nCombustion instabilities in liquid rocket engines are caused by coupling between the combustion process and pressure oscillations in a combustor, and they are characterized by the frequencies and shapes of the acoustic modes of the combustion chamber. Acoustic resonators are commonly installed in combustors to provide passive acoustic damping and prevent combustion instabilities. Previously, it has been proposed that the propellant injectors in a combustor can be tuned to act as half-wave resonators and provide acoustic damping, which requires a thorough understanding of the acoustic damping mechanisms of injectors.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, the acoustic damping of propellant injectors is measured experimentally. A new experimental facility is developed to measure the sound power reflection, transmission, and dissipation under the conditions of mean flow, high amplitude, high temperature, and higher-order modes. The effects of common design parameters \u0026ndash; namely, the typical features of an injector, the number of injectors, the ratio between the cross-sectional area of the injectors and the combustion chamber, and the position of the injectors \u0026ndash; on the absorption coefficient are investigated experimentally using the new facility. The effects of mean flow, high amplitude, high temperature, and higher-order modes are also investigated. Measurements of the fraction of sound power dissipated by the injectors and the velocity flow field at the ends of the injectors are used to elucidate the physical mechanisms responsible for the acoustic damping. Attempts are made to quantify the separate contributions of viscous dissipation and the conversion of sound to vorticity. An analytical model incorporating these acoustic damping mechanisms is developed to predict the absorption coefficient of the injectors for each of the measured geometric parameters and operating conditions.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAcoustic Damping Mechanisms of Propellant Injectors\u201d"}],"uid":"33975","created_gmt":"2017-06-05 17:02:22","changed_gmt":"2017-06-05 17:02:22","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-06-23T11:00:00-04:00","event_time_end":"2017-06-23T13:00:00-04:00","event_time_end_last":"2017-06-23T13:00:00-04:00","gmt_time_start":"2017-06-23 15:00:00","gmt_time_end":"2017-06-23 17:00:00","gmt_time_end_last":"2017-06-23 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"592337":{"#nid":"592337","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Toshinobu Watanabe","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EToshinobu Watanabe\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Eric N. Johnson)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Monocular\u003C\/strong\u003E\u003Cstrong\u003E Vision Based Obstacle Avoidance\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, June 9, 2017 @ 11:00 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight Building - Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nObstacle avoidance is one of the most important and expensive topics in Autonomous Robotics because it is an essential task for an autonomous vehicle to find an obstacle and avoid it. Any robotics designers use LIDAR, stereo camera and so on to be able to obtain more accurate sensing data. However, these approaches are more expensive than a single camera and need a specific device. Currently, many fields use UAVs for many objectives. Especially, photographing uses it from movie filming to personal use, and they have a single camera. Therefore, although the monocular camera-based recognition technique is a challenging task, its technique can be applied to a wider range, like an existing vehicle and a cheaper vehicle with fewer sensors. For this reason, this proposal mentions the monocular camera-based obstacle avoidance technique.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, this technique can be separated into two parts: a mapping and a path planning. The mapping technique is designed by a monocular vision as input, which consists of the filter technique to obtain a point cloud and an occupancy grid map. The filter includes the pre-filter for initial convergence and an Extended Kalman Filter (EKF) for final localization and mapping. The occupancy grid map updates a probability of obstacle existence, and the octree data structure adds scalability and efficient memory management to the occupancy grid map. The path planning algorithm is designed based on the octree data structure, which consists of three parts: a new A* algorithm, a tree-based trajectory generation technique, and an additional lateral trajectory. The first A* algorithm can work on the octree data structure and outputs a free corridor. The second technology generates a trajectory in that corridor. The additional lateral trajectory improves the obstacle detection.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Eric N. Johnson\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Eric Marie J Feron\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Jonnalagadda V R Prasad\u003Cbr \/\u003E\r\nDr. Hao-Min Zhou\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Patricio Antonio Vela\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cMonocular Vision Based Obstacle Avoidance\u201d"}],"uid":"33975","created_gmt":"2017-06-01 17:09:14","changed_gmt":"2017-06-01 17:09:14","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-06-09T12:00:00-04:00","event_time_end":"2017-06-09T14:00:00-04:00","event_time_end_last":"2017-06-09T14:00:00-04:00","gmt_time_start":"2017-06-09 16:00:00","gmt_time_end":"2017-06-09 18:00:00","gmt_time_end_last":"2017-06-09 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"592335":{"#nid":"592335","#data":{"type":"event","title":"Gebhardt Lecture Series presents: Dr. Siva Banda","body":[{"value":"\u003Ch2\u003EDr. Siva Banda\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EChief Scientist, Aerospace Systems Directorate\u003Cbr \/\u003E\r\nAir Force Research Laboratory\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30p.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDetails TBA\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"You are invited to hear"}],"uid":"33975","created_gmt":"2017-06-01 16:58:37","changed_gmt":"2017-06-01 17:02:35","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-02-08T15:30:00-05:00","event_time_end":"2018-02-08T16:30:00-05:00","event_time_end_last":"2018-02-08T16:30:00-05:00","gmt_time_start":"2018-02-08 20:30:00","gmt_time_end":"2018-02-08 21:30:00","gmt_time_end_last":"2018-02-08 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"591997":{"#nid":"591997","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Timothy Gallagher","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETimothy Gallagher\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Suresh Menon)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Generalized Maccormack Scheme For Low Mach Number, Chemically-Reacting Large-Eddy Simulations\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, June 2, 2017 @ 1:00 PM\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EGuggenheim Building, Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nChemically reacting flows contain a wide range of regimes with many velocity and time scales. The increasing access to computational resources enables higher-fidelity simulations of these flows. In order to take advantage of these capabilities, numerical schemes must be robust, efficient and accurate in all of the regimes present in the flow. Pressure-based schemes are suitable for many low Mach number flows, but are limited to low velocities and relatively small temperature variations. Density-based schemes struggle to converge in low-speed flows due to the time-step restrictions imposed by the acoustic velocity, which may be orders of magnitude larger than the convective velocity. Furthermore, such codes may exhibit excessive numerical dissipation due improper scaling of the dissipative properties of the scheme. Chemical reactions introduce another set of temporal scales associated with the kinetics mechanism used to model the system. These scales are often much smaller than the convective or acoustic scales and impose additional restrictions on the time-step. This disparity requires numerical schemes designed to handle the challenges that occur in low Mach number, chemically reacting flows. Analysis of density-based schemes at the low Mach number limit suggests that the development of improved, robust preconditioning with suitable operator splitting techniques leads to improved solution fidelity.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, a dual-time framework with low-Mach preconditioning is developed for complex, chemically reacting large-eddy simulations. A new version of the well-known MacCormack scheme is proposed and the resulting scheme improves the solution quality significantly at low Mach numbers. An established ordinary differential equation solver for stiff systems treats the stiffness associated with the chemical source terms. Methods to couple the PDE and ODE solvers in both pseudo-time and in physical time are proposed and analyzed. Validation of the non-reacting scheme and the coupled reacting scheme using canonical test cases demonstrates the improved solution fidelity and simulations of representative industrial applications demonstrate the combined scheme.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Suresh Menon\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Stephen Ruffin\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Marilyn Smith\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Lakshmi Sankar\u003Cbr \/\u003E\r\nDr. Yingjie Liu\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Venkateswaran Sankaran\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Vaidyanathan Sankaran\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Generalized Maccormack Scheme For Low Mach Number,  Chemically-Reacting Large-Eddy Simulations\u201d"}],"uid":"33975","created_gmt":"2017-05-22 17:56:43","changed_gmt":"2017-05-22 17:56:43","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-06-02T14:00:00-04:00","event_time_end":"2017-06-02T16:00:00-04:00","event_time_end_last":"2017-06-02T16:00:00-04:00","gmt_time_start":"2017-06-02 18:00:00","gmt_time_end":"2017-06-02 20:00:00","gmt_time_end_last":"2017-06-02 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"591137":{"#nid":"591137","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Keir C. Gonyea","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EKeir C. Gonyea\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Robert D. Braun)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Use of the Mars Atmosphere to Improve the Performance of Supersonic Retropropulsion\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday May 8, 2017, 12:30pm\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ENASA has landed seven vehicles on the surface of Mars using parachutes for supersonic descent. These parachutes are unsuited to future high mass missions due to inflation, drag, and aerothermodynamic complications. Supersonic retropropulsion is a candidate technology to replace supersonic parachutes, but is hindered by its large associated propellant mass. Atmospheric-breathing propulsion systems may reduce this mass constraint by ingesting oxidizer from the surrounding atmosphere. However, the Martian atmosphere, which is composed of primarily carbon dioxide, necessitates that metal fuels be used in order to combust the available oxidizer.\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis thesis advances the state of the art of atmospheric-breathing supersonic retropropulsion (ABSRP) by providing the first exploration into the feasibility and potential performance of ABSRP as a technology solution for high-mass Mars missions. Specific advancements are made using systems analysis methods and computational models.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EABSRP propulsion performance is assessed via a suite of analysis tools, which are developed to simulate metal \u0026ndash; CO2 combustion performance and sensitivity to both the engine design and operating regime. These tools include an equilibrium combustion simulation to evaluate engine efficiency, a finite-rate kinetics simulation to investigate the time-dependent phenomena, and a particle burning simulation to assess diffusion effects. Case studies are presented for ABSRP relevant mixtures and conditions to predict propulsion performance of the ABSRP engine across a range of conditions and verify that reasonably sized combustion chambers can provide complete combustion of the propellant.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe propulsion system results are used in an ABSRP vehicle model, which accounts for the variable engine performance across different flight regimes. This model is used to search the design space and determine the characteristics and performance of ABSRP architectures relative to competing propulsive solutions. The investigation includes an assessment of feasible and unfeasible regions of the design space in addition to design trends for optimal configurations. Mass favorable vehicles of multiple architectures are compared to understand their relative performance in order to ultimately determine the potential applicability of atmospheric-breathing propulsion for Mars descent.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Robert D. Braun (advisor)\u003Cbr \/\u003E\r\nDr. Jechiel I. Jagoda\u003Cbr \/\u003E\r\nDr. Jerry M. Seitzman\u003Cbr \/\u003E\r\nDr. Brian J. German\u003Cbr \/\u003E\r\nDr. Aaron H. Auslender\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cUse of the Mars Atmosphere to Improve the Performance of Supersonic Retropropulsion\u201d"}],"uid":"33975","created_gmt":"2017-04-28 20:16:53","changed_gmt":"2017-05-02 18:11:29","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-08T13:30:00-04:00","event_time_end":"2017-05-08T15:30:00-04:00","event_time_end_last":"2017-05-08T15:30:00-04:00","gmt_time_start":"2017-05-08 17:30:00","gmt_time_end":"2017-05-08 19:30:00","gmt_time_end_last":"2017-05-08 19:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"591199":{"#nid":"591199","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Alfredo Valverde","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAlfredo Valverde\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Panagiotis Tsiotras (Advisor)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Dynamic Modeling and Control of Spacecraft Robotic Systems using Dual Quaternions\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMay 10\u003Csup\u003Eth\u003C\/sup\u003E @ 4:00 pm\u003Cbr \/\u003E\r\nMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAs of 2014, the space servicing market has a potential revenue of $3-$5B per year due to the ever-present interest to upkeep existing orbiting infrastructure. In space servicing, there is a delicate balance between system complexity and servicer capability. Basic module-exchange servicers decrease the complexity of the servicing spacecraft, but is likely to require a more complex architecture of the serviced satellite (the host) in terms of electrical and mechanical connections.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWith increasing dexterity of the servicing satellite, host satellites can remain closer to flight-proven heritage architectures, which is a practice commonly adopted to increase reliability of space missions. This increased dexterity can be provided through the on-orbit exchange of end-effector tools appended to a robotic arm. The dynamic coupling of the arm and the base has been the subject of intense academic scrutiny and its understanding is essential to the implementability and success of robotic servicing missions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, we propose a framework to implement the different phases of a servicing mission based on dual quaternion algebra. First, we propose a dual quaternion 6-{DOF} pose-tracking controller that adaptively estimates the mass properties of a spacecraft using the concurrent learning framework. Next, we provide a generalizable case study of the derivation of the dynamic equations of motion for a spacecraft with a serial robotic manipulator. This derivation uses a Netwon-Euler approach, and its results are validated against an analogous derivation that uses a decoupled representation of translational and rotational dynamics\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFuture work will include the generalization of this framework to contain [endif]--\u0026gt;\u0026nbsp;robotic arms with [endif]--\u0026gt;\u0026nbsp;links. Additionally, for the case of a one-arm system, a pose-stabilizing controller of the end-effector will be proposed in the context of differential dynamic programming, as well as a pose-tracking controller that will follow the concept of control-computed torque. The results will then be used to simulate the autonomous rendezvous and capture of an orbiting object. Finally, an algorithm will be proposed to estimate the mass properties of said captured object.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EDr. Panagiotis Tsiotras (Advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Marcus J. Holzinger\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Patricio A. Vela\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cDynamic Modeling and Control of Spacecraft Robotic Systems using Dual Quaternions\u201d"}],"uid":"33975","created_gmt":"2017-05-02 13:14:12","changed_gmt":"2017-05-02 13:14:12","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-10T17:00:00-04:00","event_time_end":"2017-05-10T19:00:00-04:00","event_time_end_last":"2017-05-10T19:00:00-04:00","gmt_time_start":"2017-05-10 21:00:00","gmt_time_end":"2017-05-10 23:00:00","gmt_time_end_last":"2017-05-10 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"591126":{"#nid":"591126","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Pratibha Raghunandan","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EPratibha Raghunandan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026nbsp;(Advisor: Prof. Stephen M. Ruffin)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Internal Energy Modeling of Hypersonic\u003C\/strong\u003E\u003Cstrong\u003E W\u003C\/strong\u003E\u003Cstrong\u003Eeakly Ionized Non-Equilibrium Flows\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMay 1, 2017 @ 3\u0026nbsp;p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EWeber 200\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The dissociation and ionization of gases in high temperature flows, typical for planetary re-entry vehicles, require computation of finite rate chemistry and thermal non-equilibrium. This work presents the implementation of non-equilibrium flow physics capabilities in an unstructured Cartesian grid-based adaptive solver. The thermo-chemical non-equilibrium solver incorporates multiple multi-temperature models that simulate various types of energy exchanges between the constituent atoms\/ molecules. The modeling of such energy exchanges can provide different effective temperatures to define a chemical reaction, which in turn can yield significant differences in non-equilibrium chemical and thermal relaxation rates.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; A two temperature model, involving a single translational and a single vibrational temperature, is compared to a multi-vibrational, single translational model for different gases\/gaseous mixtures; the effects of composition of gases on the relaxation rates are discussed for these cases. Furthermore, the effects of the inclusion of a separate electron temperature on the vibration-translation relaxation rates in ionized flows are discussed. The study of the differences brought about by such relaxation rates in two-dimensional thermo-chemical non-equilibrium flows is proposed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The thermo-chemical non-equilibrium modeling in hypersonic flows yields considerable differences in resultant chemistry and shock stand-off distances in comparison with chemical non-equilibrium flows, and significant differences with equilibrium models. This particularly has an impact on the prediction of electron and ion densities in weakly ionized gases, the accurate modeling of which are very important for radio blackout mitigation and plasma-aerodynamic flow control. It is identified that accurate modeling of energy exchanges at the macroscopic level along with the simulation of thermal inhomogeneities are imperative to successfully replicate ground-based tests in a computationally efficient manner, as well as capture the flow physics associated with shock waves traveling through weakly ionized gases. This proposed work will investigate such underlying physics through the appropriate modeling of internal energy for the high speed flows of interest.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Stephen\u0026nbsp;Ruffin (Advisor)\u003Cbr \/\u003E\r\nDr. Suresh\u0026nbsp;Menon\u003Cbr \/\u003E\r\nDr. Wenting Sun\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cInternal Energy Modeling of Hypersonic Weakly Ionized Non-Equilibrium Flows\u201d"}],"uid":"33975","created_gmt":"2017-04-28 18:19:45","changed_gmt":"2017-04-28 18:19:45","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-01T16:00:00-04:00","event_time_end":"2017-05-01T18:00:00-04:00","event_time_end_last":"2017-05-01T18:00:00-04:00","gmt_time_start":"2017-05-01 20:00:00","gmt_time_end":"2017-05-01 22:00:00","gmt_time_end_last":"2017-05-01 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"591122":{"#nid":"591122","#data":{"type":"event","title":"AE Presents: Michael E. Mueller from Princeton University","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EMichael E. Mueller\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDepartment of Mechanical and Aerospace Engineering\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EPrinceton University\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Turbulent Combustion Modeling for Large Eddy Simulation: Finding Simplicity in Complexity\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMay 2 @ 1:30pm\u003Cbr \/\u003E\r\nMontgomery Knight Rm 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETurbulent combustion modeling is a challenging multi-physics, multi-scale modeling problem.\u0026nbsp; Both turbulence and combustion are already difficult multi-scale problems, and the combination of the two brings in new interactions across various length and time scales that fundamentally change both the combustion processes and the turbulence.\u0026nbsp; This seminar will focus on the modeling of unresolved, small-scale details of the combustion processes and the many chemical species involved.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELarge Eddy Simulation (LES) models for turbulent combustion generally fall into two distinct classes subject to an inherent trade-off: models that are very general in their description of the underlying combustion processes but computationally intensive versus models that make very constraining assumptions about the underlying combustion processes but are computationally efficient.\u0026nbsp; In the latter class of models, the combustion processes are typically constrained to low-dimensional manifolds obtained by assuming combustion occurs in a single asymptotic mode: premixed flames, nonpremixed flames, or homogeneous reactions.\u0026nbsp; For multi-modal combustion, the current state-of-the-art is to apply the \u0026ldquo;best\u0026rdquo; asymptotic model locally.\u0026nbsp; However, recent LES results in a laboratory-scale turbulent flame exhibiting partially premixed combustion demonstrate the inherent shortcomings of this approach not only in selecting the \u0026ldquo;best\u0026rdquo; asymptotic model but also in relying solely on asymptotic models.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the final portion of the seminar, a new, generalized combustion model will be presented that seeks to break the inherent trade-off above.\u0026nbsp; The model relies on a more detailed manifold description that can capture not only all of the asymptotic modes of combustion in their respective limits but also intermediate regimes.\u0026nbsp; Key characteristics of the model will be discussed, and algorithmic challenges and opportunities in coupling the model with LES will be highlighted.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout the speaker:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMichael E. Mueller is an Assistant Professor in the Department of Mechanical and Aerospace Engineering at Princeton University, an associated faculty member in the Princeton Institute for Computational Science and Engineering, and an associated faculty member in the Andlinger Center for Energy and the Environment.\u0026nbsp; He received a BS degree in mechanical engineering from The University of Texas at Austin in 2007, a MS degree in mechanical engineering from Stanford University in 2009, and a PhD degree in mechanical engineering from Stanford University in 2012 before moving to Princeton in 2012.\u0026nbsp; His expertise is the computational modeling of turbulent reacting flows, where he utilizes a multi-fidelity approach leveraging first-principles calculations for physics discovery for the development of physics-based models for engineering calculations.\u0026nbsp; Areas of current interest within his research group include multi-modal turbulent combustion, pollutant emissions, and combustion-affected turbulence.\u0026nbsp; In addition, he is active in areas of applied computational science including the development of new approaches to uncertainty quantification and the development of new numerical algorithms and their implementation on emerging architectures.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Turbulent Combustion Modeling for Large Eddy Simulation: Finding Simplicity in Complexity"}],"uid":"33975","created_gmt":"2017-04-28 18:03:02","changed_gmt":"2017-04-28 18:03:02","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-02T14:30:00-04:00","event_time_end":"2017-05-02T15:30:00-04:00","event_time_end_last":"2017-05-02T15:30:00-04:00","gmt_time_start":"2017-05-02 18:30:00","gmt_time_end":"2017-05-02 19:30:00","gmt_time_end_last":"2017-05-02 19:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590919":{"#nid":"590919","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Tejas Puranik","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETejas Puranik\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026nbsp;(Advisor: Prof. Dimitri N. Mavris)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Methodology for Quantitative Data-Driven Safety Assessment for General Aviation\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, May 4, 2017 @ 9:00 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EWeber Space Science and Technology Building\u003Cbr \/\u003E\r\nCollaborative Visualization Environment (CoVE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe safety record of aviation operations has been steadily improving for the past few decades, however, accident rates in General Aviation (GA) have not improved significantly compared to scheduled airline operations. Per the Federal Aviation Administration (FAA), the demand for air travel and traffic is predicted to grow steadily through 2036 at a rate of approximately 1.8% annually with GA set to receive a much-needed revitalization. However, safety remains a major hurdle and with such a large increase in expected operations, there is an ever-increasing demand for improving safety of GA operations\u003C\/p\u003E\r\n\r\n\u003Cp\u003EVarious data-driven safety programs such as Flight Data Monitoring (FDM) that exist in commercial aviation domain have percolated in GA with the aim of improving safety. These programs typically feature a continuous cycle involving data collection from on-board recorders, retrospective analysis of flight data records, identification of operational safety exceedances, design and implementation of corrective measures, and monitoring to assess their effectiveness. While these programs have been shown to be effective in reducing accident rates, there are certain obstacles in their widespread implementation in the GA domain. The variability in recorded parameters in GA, heterogeneity in GA fleet, different missions flown, etc. are some of the important hurdles. Additionally, existing techniques of analysis such as exceedance detection are designed to identify known unsafe conditions but are potentially blind to safety-critical conditions that may be captured in flight data records but are not present in the set of predefined safety events.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe overarching objective of this dissertation is to develop a methodology that can provide objective metrics for quantifying GA flight safety, enable identification of anomalous operations, and provide predictive capabilities that will complement existing approaches. The methodology presents the use of energy-based metrics as objective currency that can be used for quantifying safety across the heterogeneous GA fleet. These metrics are defined using recorded flight data and aircraft performance models. An anomaly detection framework is then developed using these metrics for identifying different types of anomalies (flight-level and instantaneous) in GA operations. A novel technique of calibrating aircraft performance models used in defining these metrics is proposed using data available in the public domain. The obtained calibrated models are further refined by employing Bayesian updating using actual flight data records. Finally, the calibrated performance models and a flight simulation model will be utilized to construct an offline surrogate model that approximates boundaries or limits of the performance envelope and can be queried online to identify when the aircraft might be drifting outside its safety space. Once the methodology is developed, its implementation on a set of real flight data records will be demonstrated through various experiments to highlight its widespread applicability.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; 1.\u0026nbsp; Prof. Dimitri Mavris (Advisor)\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; School of Aerospace Engineering, \u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; 2.\u0026nbsp; Dr. Simon Briceno\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; School of Aerospace Engineering, \u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; 3.\u0026nbsp; Prof. Karen Marais\u003Cbr \/\u003E\r\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; School of Aeronautics and Astronautics, \u003Cem\u003EPurdue University\u003C\/em\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Methodology for Quantitative Data-Driven Safety Assessment for General Aviation\u201d"}],"uid":"33975","created_gmt":"2017-04-25 18:21:14","changed_gmt":"2017-04-25 18:21:14","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-04T10:00:00-04:00","event_time_end":"2017-05-04T12:00:00-04:00","event_time_end_last":"2017-05-04T12:00:00-04:00","gmt_time_start":"2017-05-04 14:00:00","gmt_time_end":"2017-05-04 16:00:00","gmt_time_end_last":"2017-05-04 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590898":{"#nid":"590898","#data":{"type":"event","title":"AE Presents:  Synchronization Transition in a Thermoacoustic System: Temporal and Spatiotemporal Analysis ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EYou are invited to hear:\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ESynchronization Transition in a Tthermoacoustic System:\u003Cbr \/\u003E\r\nTemporal and Spatiotemporal Analysis \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003Ea talk by\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. R.I. Sujith, Ph.D. AE \u0026#39;94\u003C\/strong\u003E\u003Cbr \/\u003E\r\nIndian Institute of Technology\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESynchronization, the phenomenon of matching the rhythms of oscillators upon coupling, is ubiquitous in nature. Until now, one has held the notion that mutually coupled chaotic oscillators synchronize but retain their chaotic behavior, and so do coupled periodic oscillators. The possibility of alteration of the underlying dynamics of mutually coupled oscillators during synchronization seems to have received less attention. We present experimental evidence of synchronization, wherein the desynchronized coupled chaotic oscillators transition from a state of chaotic to periodic oscillations as they synchronize.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe thermoacoustic system we consider in this study is a turbulent flame combustor. The synchronization happens between the acoustic oscillations and heat release rate oscillations in this combustor. We carry out two separate analyses, one in the temporal domain and the other in the spatiotemporal domain. In the temporal analysis, the collective behavior of the spatially extended heat release rate oscillations is captured by summing up the intensity of light emitted from the flame. On the other hand, in the spatiotemporal analysis, we consider the spatial field of heat release rate oscillations as a set of coupled oscillators. The thermoacoustic system transitions from low amplitude chaotic oscillations to large amplitude periodic oscillations with a suitable change in some control parameter.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOur temporal analysis reveals that this transition culminates in a state of generalized synchronization (GS) of the two coupled oscillators, having gone through intermittent phase synchronization (IPS) and phase synchronization (PS). During IPS, the oscillators are periodic in the synchronized phase while harboring aperiodicity in the desynchronized phase. The spatiotemporal analysis, on the other hand, demonstrates the desynchronized nature of entire population of oscillators during the chaotic state, while a phase synchronized behavior is seen in the periodic state. An interesting feature of the spatiotemporal study is observed during intermittency, wherein the patches of synchronized periodic oscillations and desynchronized aperiodic oscillations simultaneously coexist in the reaction zone. This intermittent state resembles a chimera state. Additionally, in both the temporal and spatiotemporal cases, the amplitude of synchronous oscillations is found to be very large.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout Dr. Sujith\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nDr. R. I. Sujith graduated with his B. Tech in Aerospace Engineering from the Indian Institute of Technology Madras in 1988 and M. S. (1990) and Ph. D. (1994) from the Georgia Institute of Technology, where he received the \u0026ldquo;top graduate student in the college of engineering\u0026rdquo; award. He worked as a post-doctoral fellow at the Georgia Institute of Technology in 1995. He joined the Department of Aerospace Engineering at the Indian Institute of Technology Madras in 1995 and is a full professor since 2006. He is also a Hans Fischer Senior Fellow of the Institute for Advanced Study (IAS) of the Technical University of Munich.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESujith was the founding editor-in-chief of the\u003Cem\u003E\u003Cstrong\u003E International Journal of Spray and Combustion Dynamics\u003C\/strong\u003E\u003C\/em\u003E from 2009-2015. He is a recipient of the Alexander Von Humboldt Fellowship. He is a fellow of the Indian National Academy of Engineering and the Indian Academy of Sciences, Bangalore, and has been conferred the title of \u0026ldquo;TUM ambassador\u0026rdquo; or the Technical University of Munich.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The School of Aerospace Engineering will present at talk by Dr. R. I Sujith "}],"uid":"27836","created_gmt":"2017-04-25 16:41:28","changed_gmt":"2017-04-25 16:47:46","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-03T14:00:00-04:00","event_time_end":"2017-05-03T15:00:00-04:00","event_time_end_last":"2017-05-03T15:00:00-04:00","gmt_time_start":"2017-05-03 18:00:00","gmt_time_end":"2017-05-03 19:00:00","gmt_time_end_last":"2017-05-03 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"174159","name":"AE  alumnus"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590872":{"#nid":"590872","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Sampath Adusumilli","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ESampath Adusumilli\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Dr. Jerry Seitzman)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Laminar Flame Speed Measurements at Elevated Temperatures and Pressures for Validation of Jet Fuel Mechanisms\u003C\/strong\u003E\u0026rdquo;\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight 317, May 4\u003Csup\u003Eth\u003C\/sup\u003E @ 11:00 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EConducting full-scale experiments on jet engines is a costly and time consuming process. A practical solution for avoiding these issues is to move towards full scale simulations of jet engines, as flow inside a jet engine is reacting, the reaction chemistry (which is dependent on the flow conditions, type of fuel and oxidizer etc.) plays an important role in the accuracy of the simulations. A full scale kinetic model for hydrocarbon combustion involves hundreds of species and thousands of reactions. Depending upon the flow conditions only some of the reactions are significant, this leads to a reduced order kinetic models. These kinetic models\/mechanisms need to be validated before they can be used in simulations. Useful combustion characteristics for validation of these mechanisms against experimental data are ignition, extinction, speciation and flame structure. Representative data for each of these phenomena are often measured through ignition delay time, laminar flame extinction, species profiles from chemical reactors and laminar flame speed respectively. For this research, laminar flame speed (S\u003Csub\u003EL\u003C\/sub\u003E) is measured using a well-validated Bunsen Flame Technique (BFT) to experimentally validate chemical kinetic models.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELaminar flame speed is experimentally measured at conditions relevant to jet engine combustors and afterburners. n-decane, C\u003Csub\u003E2\u003C\/sub\u003EH\u003Csub\u003E4\u003C\/sub\u003E and C\u003Csub\u003E3\u003C\/sub\u003EH\u003Csub\u003E6\u003C\/sub\u003E are the representative jet fuels examined for this study. The conditions varied include high preheat temperatures (up to 650 K), high pressures (up to 5 atm) and vitiated conditions. Vitiation introduces combustion products such as CO\u003Csub\u003E2\u003C\/sub\u003E and H\u003Csub\u003E2\u003C\/sub\u003EO into the reactant stream, this would alter chemical kinetics when compared to combustion in standard air. Diluents species in vitiated flow are generally divided into two categories reactive and non-reactive, CO\u003Csub\u003E2\u003C\/sub\u003E and N\u003Csub\u003E2 \u003C\/sub\u003Eare used as representative diluents respectively.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThese measurements are used to assess the performance of several chemical kinetic models. Tools such as sensitivity analysis and reaction pathway analysis will be employed to derive conclusions about the performance of kinetic models. The validated kinetic models in conjunction with the experimental data will form the basis to define correlations of S\u003Csub\u003EL\u003C\/sub\u003E with change in diluent composition of a premixed mixture. Such correlations provide an empirical method to calculate S\u003Csub\u003EL\u003C\/sub\u003E at desired flow conditions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThesis Committee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Jerry Seitzman (\u003Cem\u003EAdvisor\u003C\/em\u003E)\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Cbr \/\u003E\r\nDr. Tim Lieuwen\u003Cbr \/\u003E\r\nDr. Wenting Sun\u003Cbr \/\u003E\r\nDr. Jechiel Jagoda\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cLaminar Flame Speed Measurements at Elevated Temperatures and Pressures for Validation of Jet Fuel Mechanisms\u201d"}],"uid":"33975","created_gmt":"2017-04-25 12:56:54","changed_gmt":"2017-04-25 12:56:54","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-04T12:00:00-04:00","event_time_end":"2017-05-04T14:00:00-04:00","event_time_end_last":"2017-05-04T14:00:00-04:00","gmt_time_start":"2017-05-04 16:00:00","gmt_time_end":"2017-05-04 18:00:00","gmt_time_end_last":"2017-05-04 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590735":{"#nid":"590735","#data":{"type":"event","title":"Ph.D. Thesis Defense:  SeunDo Heo","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ESeunDo Heo\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Co-advisors: Dr. Dewey H. Hodges and Dr. Olivier A. Bauchau)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Parallel Computation Algorithms for Multibody Dynamics Simulations\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, May 4th, 2017 @ 1pm\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Building Room 325\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nFlexible multibody dynamics simulations have been performed sequentially on a single processor because the problem sizes for the simulations were not large. However, the advanced designs of rotor blades or CSD\/CFD (Computational Structural\/Fluid Dynamics) coupled problems call for more stringent accuracy requirements and faster computations in multibody dynamics simulations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor parallel computations, a novel non-overlapping domain decomposition method is developed and implemented to perform flexible multibody dynamics simulations in parallel. Non-overlapping domain decomposition methods such as classical substructuring methods and finite element tearing and interconnecting (FETI) methods are also reviewed and compared to see how they have been developed and improved for better domain decomposition.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe proposed domain decomposition approach with a localized version of Lagrange multiplier technique and an augmented Lagrangian formulation in conjunction with the Lagrange multipliers, is formulated and discussed in detail. Within the framework of direct solvers, the solution procedure with LU factorization and forward and backward substitutions has been designed for parallel computations. The actual implementation of the parallel algorithm with the domain decomposition method on a finite-element-based multibody dynamics simulation program (Dymore), is also described.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFinally, the parallel algorithm is tested on parallel hardware with numerical experiments to evaluate the accuracy and scalability of the algorithm for various domain decomposition cases.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Olivier A. Bauchau, (AE, Advisor, University of Maryland, College Park)\u003Cbr \/\u003E\r\nProf. Dewey H. Hodges, (AE, Advisor)\u003Cbr \/\u003E\r\nProf. Emeritus Kenneth M. Will (CEE)\u003Cbr \/\u003E\r\nProf. Marilyn J. Smith (AE)\u003Cbr \/\u003E\r\nProf. Aldo A. Ferri (ME)\u003Cbr \/\u003E\r\nProf. George A. Kardomateas (AE)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cParallel Computation Algorithms for Multibody Dynamics Simulations\u201d"}],"uid":"33975","created_gmt":"2017-04-20 20:27:27","changed_gmt":"2017-04-20 20:27:27","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-04T14:00:00-04:00","event_time_end":"2017-05-04T16:00:00-04:00","event_time_end_last":"2017-05-04T16:00:00-04:00","gmt_time_start":"2017-05-04 18:00:00","gmt_time_end":"2017-05-04 20:00:00","gmt_time_end_last":"2017-05-04 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590590":{"#nid":"590590","#data":{"type":"event","title":"AE Presents: Ben T. Zinn Combustion Symposium","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to the \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E2017 Ben T. Zinn Combustion Symposium\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea celebration of the 80th birthday of Prof. Ben T. Zinn\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, April 27\u003Cbr \/\u003E\r\n8:45 a.m. - 1:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n(\u003Cem\u003ELunch, 12 - 1:30 pm\u003C\/em\u003E)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAgenda will include\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EResearch on Kinetics and New Combustion Techniques (Prof. Wenting Sun)\u003C\/li\u003E\r\n\t\u003Cli\u003EWhy Does Turbulence Increase Burning Rates? (Prof. Tim Lieuwen)\u003C\/li\u003E\r\n\t\u003Cli\u003ETransition to Turbulence in Variable-density Flows (Prof. Devesh Ranjan)\u003C\/li\u003E\r\n\t\u003Cli\u003EComplex Network Approach for Investigating Thermoacoustic Systems (Prof. Sujith)\u003C\/li\u003E\r\n\t\u003Cli\u003ESimulations of Combustion Instability in High Pressure Combustors\u003Cbr \/\u003E\r\n\t(Prof. Suresh Menon)\u003C\/li\u003E\r\n\t\u003Cli\u003ESpray Combustion Research for Advanced IC Engines (Prof. Caroline Genzale)\u003C\/li\u003E\r\n\t\u003Cli\u003EGT\u0026#39;s Contribution to the Future of Electric Propulsion (Prof. Mitchell Walker)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe half-day symposium will include a catered lunch and talks by noted experts in the field.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"The School of Aerospace Engineering will present a half-day symposium in honor of one of our most esteemed professors, Ben T. Zinn"}],"uid":"27836","created_gmt":"2017-04-18 19:30:29","changed_gmt":"2017-04-19 16:02:52","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-27T09:45:00-04:00","event_time_end":"2017-04-27T14:30:00-04:00","event_time_end_last":"2017-04-27T14:30:00-04:00","gmt_time_start":"2017-04-27 13:45:00","gmt_time_end":"2017-04-27 18:30:00","gmt_time_end_last":"2017-04-27 18:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"hg_media":{"58042":{"id":"58042","type":"image","title":"Ben Zinn","body":null,"created":"1449176194","gmt_created":"2015-12-03 20:56:34","changed":"1475894510","gmt_changed":"2016-10-08 02:41:50","alt":"Ben Zinn","file":{"fid":"190748","name":"Zinnhead.JPG","image_path":"\/sites\/default\/files\/images\/Zinnhead_0.JPG","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Zinnhead_0.JPG","mime":"image\/jpeg","size":3132227,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Zinnhead_0.JPG?itok=Iz9kfhCp"}}},"media_ids":["58042"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"174083","name":"Ben T. Zinn"},{"id":"171652","name":"Ben T. Zinn Combustion Lab"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590573":{"#nid":"590573","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Tanmay Rajpurohit","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETanmay Rajpurohit\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Wassim M. Haddad)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Stochastic Nonlinear Control: A Unified Framework for Stability, Dissipativity, and Optimality\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday May 5 @ 3:00p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C\/strong\u003E\u003Cbr \/\u003E\r\nIn this work, we develop connections between stochastic stability theory and stochastic optimal control. In particular, first we develop Lyapunov and converse Lyapunov theorems for stochastic semistable nonlinear dynamical systems. Semistability is the property whereby the solutions of a stochastic dynamical system almost surely converge to (not necessarily isolated) Lyapunov stable in probability equilibrium points determined by the system initial conditions. Then we develop a unified framework to address the problem of optimal nonlinear analysis and feedback control for nonlinear stochastic dynamical systems. Specifically, we provide a simplified and tutorial framework for stochastic optimal control and focus on connections between stochastic Lyapunov theory and stochastic Hamilton-Jacobi-Bellman theory. In particular, we show that asymptotic stability in probability of the closed-loop nonlinear system is guaranteed by means of a Lyapunov function which can clearly be seen to be the solution to the steady-state form of the stochastic Hamilton-Jacobi-Bellman equation, and hence, guaranteeing both stochastic stability and optimality. Moreover, extensions to stochastic finite-time and partial-state stability and optimal stabilization are also addressed. Finally, we extended the notion of dissipativity theory for deterministic dynamical systems to controlled Markov diffusion processes and show the utility of the general concept of dissipation for stochastic systems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. W. M. Haddad (Advisor)\u003Cbr \/\u003E\r\nProf. J.V.R. Prasad\u003Cbr \/\u003E\r\nProf. Vijay V. Vazirani\u003Cbr \/\u003E\r\nProf. Erik I. Verriest,\u003Cbr \/\u003E\r\nProf. E. Theodorou\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cStochastic Nonlinear Control: A Unified Framework for Stability, Dissipativity, and Optimality\u201d"}],"uid":"33975","created_gmt":"2017-04-18 16:45:32","changed_gmt":"2017-04-18 16:45:32","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-05T16:00:00-04:00","event_time_end":"2017-05-05T19:00:00-04:00","event_time_end_last":"2017-05-05T19:00:00-04:00","gmt_time_start":"2017-05-05 20:00:00","gmt_time_end":"2017-05-05 23:00:00","gmt_time_end_last":"2017-05-05 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590570":{"#nid":"590570","#data":{"type":"event","title":"AE Presents: Human-Autonomy Collaboration and the Yin-Yang of Uncertain Decision Making","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThe Daniel Guggenheim School of Aerospace Engineering\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Eis proud to present\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EProf. Nisar Ahmed \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAerospace Engineering Sciences Department\u003Cbr \/\u003E\r\nUniversity of Colorado Boulder \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Human-Autonomy Collaboration and the Yin-Yang of Uncertain Decision Making\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, April 20 @ 12:00pm\u003Cbr \/\u003E\r\nGuggenheim Building Room 246\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe age of autonomy is here. However, since autonomous systems are products of imperfect human engineering designed to make decisions under uncertainty in a complex world, the promise of \u0026lsquo;set-it-and-forget-it\u0026rsquo; autonomy is still quite far off. It is therefore unrealistic to expect autonomous systems to operate out of the box \u0026ldquo;exactly right\u0026rdquo;. For sufficiently rich tasks that constantly push the technological cutting edge, they will encounter unexpected situations that require reasoning beyond their designed capabilities. As such, intelligent autonomy must not only be able to gather, process, and act on information independently \u0026ndash; they should also be cognizant of what they can and cannot accomplish, and know when and how to seek help.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHuman-machine interaction is thus clearly a key component of autonomous system design, alongside perception, planning, learning, etc. An autonomous system should ideally enable stakeholders and users to fluidly (re-)delegate tasks to the system, assess information, and help improve operations -- without requiring users to \u0026ldquo;babysit\u0026rdquo; it. Yet, the best balance is difficult to achieve in practice, especially if human-machine interaction is treated as an afterthought or \u0026ldquo;necessary evil\u0026rdquo;. Humans can also do more than act as band aids for corner cases where autonomous reasoning algorithms haven\u0026rsquo;t caught up yet.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis talk will highlight novel pathways that have been developed in recent years to enable \u003Cem\u003Ecollaborative \u003C\/em\u003Ehuman-machine reasoning from the outset in autonomous system design. The focus will be on probabilistic techniques and user-friendly interfaces (e.g. semantic natural language, sketching) that allow autonomous systems to intelligently augment their reasoning with human input. These allow autonomous systems to gracefully \u0026ldquo;fill in gaps and cut knots\u0026rdquo; in hard problems, without undermining the roles and capabilities of either autonomy or humans. These methods also point to the importance of communication and uncertainty in shaping the perception and use of machine autonomy. In this light, it is evident that autonomous systems ought to be embraced as products and extensions of human reasoning, rather than as full replacements.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout Prof. Ahmed:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nNisar Ahmed received his Ph.D. in Mechanical Engineering at Cornell University, Ithaca, NY\u0026nbsp;in January 2012, focusing on\u0026nbsp;Dynamics, Systems and Controls with\u0026nbsp;minors in ECE and Applied Math. From 2012-2013, he\u0026nbsp;was a postdoctoral research associate in the\u0026nbsp;\u003Ca href=\u0022http:\/\/cornell-asl.org\/\u0022 style=\u0022color:rgb(5,99,193); text-decoration:underline\u0022 target=\u0022_blank\u0022\u003ECornell Autonomous Systems Lab (ASL)\u003C\/a\u003E\u0026nbsp;with\u0026nbsp;\u003Ca href=\u0022http:\/\/www.mae.cornell.edu\/mae\/people\/profile.cfm?netid=mc288\u0022 style=\u0022color:rgb(5,99,193); text-decoration:underline\u0022 target=\u0022_blank\u0022\u003EProfessor Mark Campbell\u003C\/a\u003E. He\u0026nbsp;obtained his B.S. in Engineering (summa cum laude)\u0026nbsp;in 2006 from\u0026nbsp;\u003Ca href=\u0022http:\/\/cooper.edu\/\u0022 style=\u0022color:rgb(5,99,193); text-decoration:underline\u0022 target=\u0022_blank\u0022\u003EThe Cooper Union\u003C\/a\u003E\u0026nbsp;in his hometown of New York City. He joined the Aerospace Engineering Sciences Department at CU Boulder as an Assistant Professor in 2014.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Prof. Nisar Ahmed from the University of Colorado Boulder will speak"}],"uid":"33975","created_gmt":"2017-04-18 16:24:08","changed_gmt":"2017-04-18 16:24:08","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-20T13:00:00-04:00","event_time_end":"2017-04-20T14:30:00-04:00","event_time_end_last":"2017-04-20T14:30:00-04:00","gmt_time_start":"2017-04-20 17:00:00","gmt_time_end":"2017-04-20 18:30:00","gmt_time_end_last":"2017-04-20 18:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590534":{"#nid":"590534","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Balaji Muralidharan","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBalaji Muralidharan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Suresh Menon)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u0026ldquo;\u003Cstrong\u003ETowards Simulations of Turbulent Reacting Flow Problems in Complex Geometries with Moving\/Stationary Boundaries\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, 28 April @11:00 a.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nMany useful engineering devices involve moving boundaries interacting with a reacting compressible flow. Examples of such applications include propulsion systems with moving components such as Internal Combustion (IC) engines, hypersonic propulsive devices such as Oblique Detonation Wave (ODW) engines and solid rocket motors involving regressing propellant surfaces. Computational Fluid Dynamics (CFD) can be effectively employed to study these systems. However, conventional numerical methods face several difficulties related to grid generation, treatment of moving boundaries, lack of adequate grid resolution at an affordable computational cost, and shortcomings in closure models required for Large Eddy Simulation (LES). This thesis demonstrates new accurate numerical models and subgrid closures for LES of problems in non-trivial geometries with moving boundaries.\u0026nbsp; A new high-order adaptive cut-cell based embedded boundary method is developed for viscous flows, which can provide a smooth and accurate reconstruction to predict the near-wall shear stress and pressure distribution. The method can achieve a high order of accuracy even under adverse geometrical constraints such as narrow gaps and sharp corners due to a novel and robust cell clustering algorithm. This algorithm also enforces the stability of the numerical scheme in the presence of arbitrary low volume cells formed in the cell cutting process.\u0026nbsp; Additionally, an extended cell clustering approach, which can achieve exact conservation of mass, momentum, and energy is proposed for moving boundaries.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe embedded boundary method is built on a massively parallel framework that performs block structured Adaptive Mesh Refinement (AMR) by interfacing with the BoxLib open source library.\u0026nbsp; This modeling framework is then applied to study fundamental physics in high-speed propulsion systems, for example, shock-turbulence interactions, flame-turbulence interaction, and flame\/detonation stabilization in a reacting system.\u0026nbsp; LES using the multilevel subgrid closure for flow and chemistry is used to study flame anchoring in a transverse reacting jet in cross flow. Important mechanisms that stabilize the flame are identified and shown to be consistent with past observations from experiments and using direct numerical simulations (DNS) but obtained here using much coarser grid LES. Finally, to demonstrate the ability of the methodology to simulate moving bodies in a reactive system, DNS of a hypersonic projectile fired into a reacting flow is performed to reveal key effects of pressure on the stabilization of detonation ahead of the projectile. \u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Stephen M. Ruffin (AE)\u003Cbr \/\u003E\r\nProf. Lakshmi N. Sankar (AE)\u003Cbr \/\u003E\r\nProf. Julian J. Rimoli (AE)\u003Cbr \/\u003E\r\nProf. Alexander Alexeev (ME)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cTowards Simulations of Turbulent Reacting Flow Problems in Complex Geometries with Moving\/Stationary Boundaries\u201d"}],"uid":"33975","created_gmt":"2017-04-17 19:50:43","changed_gmt":"2017-04-17 21:49:18","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-28T12:00:00-04:00","event_time_end":"2017-04-28T14:00:00-04:00","event_time_end_last":"2017-04-28T14:00:00-04:00","gmt_time_start":"2017-04-28 16:00:00","gmt_time_end":"2017-04-28 18:00:00","gmt_time_end_last":"2017-04-28 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590443":{"#nid":"590443","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Suo Yang","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ESuo Yang\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisors: Prof. Wenting Sun and Prof. Vigor Yang)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Effects of Detailed Finite Rate Chemistry in Turbulent Combustion\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, 5\u003Csup\u003Eth\u003C\/sup\u003E May 2017 @ 1:00 p.m.\u003Cbr \/\u003E\r\nGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nThe development of combustion energy-conversion systems requires accurate simulation tools, such as Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES), for ignition, combustion instability, lean blowout, and emissions. Because of high computational cost, DNS and LES typically employ either a flamelet model with detailed chemistry or an over-simplified finite rate chemistry. Both approaches, however, are of limited accuracy and may reduce the quality of prediction. In this dissertation, we establish a new numerical framework for DNS and LES of turbulent combustion, employing correlated dynamic adaptive chemistry (CoDAC), correlated evaluation of transport properties (CoTran), and a point-implicit stiff ODE solver (ODEPIM). CoDAC utilizes a path flux analysis (PFA) method to reduce the large chemical kinetics to a smaller size for each location and time step. CoTran uses a similar correlation method to accelerate the evaluation of mixture-averaged diffusion (MAD) coefficients.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe framework is first tested on a canonical turbulent premixed flame. Compared to conventional DNS, the total computation time of the new framework is 20 times faster, chemical kinetics is 46 times faster, and transport is 72 times faster, while maintains high accuracy and good parallel scalability. Based on above DNS framework, an efficient finite-rate chemistry (FRC) - LES formulation is developed. Compared to conventional FRC-LES, this new version provides a speed-up of 8.6 times for chemistry, and 6.4 times for total computation. Both new FRC-LES and flamelet\/progress-variable (FPV)-LES are conducted for a piloted partially premixed methane\/air flame.\u0026nbsp; Although the two approaches predict similar time-averaged flame and statistics; instantaneously, FPV-LES predicts significantly smaller regions with high temperature. Near the stoichiometric region, with respect to experimental data, FPV-LES over-predicts the radical generation, but under-predicts the CO generation and heat release, which explains its under-prediction of temperature. In contrast, on the fuel rich side, CO is no more a bottleneck, and FPV-LES predicts higher temperature. Comparing to experimental data, FRC-LES provides better predictions for temperature and species.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMost chemical kinetics models offer similar predictions in 0D\/1D simulations of laminar combustion. Is it appropriate to extend this observation to 3D turbulent combustions? In order to answer this question, GRI-Mech 3.0 and an 11-species syngas model are compared by performing 3D finite-rate DNS of a turbulent non-premixed syngas flame. Significant quantitative discrepancies indicate high sensitivity to the chemical kinetics model. The 11-species model predicts a lower radicals-to-products conversion rate, causing statistically more local extinction and less re-ignition. This sensitivity is magnified relative to a 1D steady laminar simulation by the effects of unsteadiness and turbulence, with the deviations in species concentrations, temperature, and reaction rates forming a nonlinear positive feedback loop.\u0026nbsp; The differences between the two models are primarily due to: (a) the larger number of species in GRI-Mech 3.0; and (b) the differences in reaction rate coefficients for the same reactions in the two models. Both (a) and (b) are sensitive to unsteadiness and other turbulence effects, but (b) is dominant and more sensitive.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Wenting Sun, AE\u003Cbr \/\u003E\r\nDr. Vigor Yang, AE\u003Cbr \/\u003E\r\nDr. Suresh Menon, AE\u003Cbr \/\u003E\r\nDr. Yiguang Ju, Princeton MAE\u003Cbr \/\u003E\r\nDr. Yingjie Liu, MATH\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cEffects of Detailed Finite Rate Chemistry in Turbulent Combustion\u201d"}],"uid":"33975","created_gmt":"2017-04-14 17:31:54","changed_gmt":"2017-04-17 18:00:39","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-05T14:00:00-04:00","event_time_end":"2017-05-05T16:00:00-04:00","event_time_end_last":"2017-05-05T16:00:00-04:00","gmt_time_start":"2017-05-05 18:00:00","gmt_time_end":"2017-05-05 20:00:00","gmt_time_end_last":"2017-05-05 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590412":{"#nid":"590412","#data":{"type":"event","title":"Ph.D. Thesis Defense: Nunthadech Rodcheuy","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ENunthadech Rodcheuy\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Prof. George A. Kardomateas\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Advanced High Order Theories and Elasticity Solutions for Curved Sandwich Composite Panels\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EApril 28\u003Csup\u003Eth\u003C\/sup\u003E @ 2:00 pm\u003Cbr \/\u003E\r\nRoom 325 Montgomery Knight Building\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA new one-dimensional Extended High order Sandwich Panel Theory (EHSAPT) for curved panels is presented. The theory accounts for the sandwich core compressibility in the radial direction as well as the core circumferential rigidity. Two distinct core displacement fields are proposed and investigated. One is a logarithmic (it includes terms that are linear, inverse, and logarithmic functions of the radial coordinate). The other is a polynomial (it consists of second and third order polynomials of the radial coordinate) and it is an extension of the corresponding field for the flat panel. In both formulations the two thin curved face sheets are assumed to be perfectly bonded to the core and follow the classical Euler-Bernoulli beam assumptions. The new theory is formulated by Principle of Minimum Total Potential Energy for static and Hamilton\u0026#39;s principle for free vibration analysis.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThen, the linear elasticity displacement formulation and solutions for a generally asymmetric simply support sandwich curved beam\/panel consisting of orthotropic core and face sheets are presented. Closed-form analytical solutions are derived for the curved sandwich subjected to a top face distributed static transverse loading; and the method of Frobenius series is applied in free vibration analysis.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ENext, due to the curvature, the first order shear deformation (FOSD) theory for curved sandwich panels is not a direct extension of the corresponding one for flat panels and thus, it is formulated accordingly, and its unique features, such as the reference curve, are discussed. Three versions of the FOSD theory are formulated:\u0026nbsp; the one based on direct variational formulation based on the assumed through-thickness displacement field (termed \u0026ldquo;basic\u0026rdquo;), one based on the definition of an equivalent shear modulus for the section (termed \u0026ldquo;Geq\u0026rdquo;) and one based on derivation of a shear correction factor, which is considered in conjunction with the equivalent shear modulus. In addition, the classical theory for curved sandwich panels which does not include transverse shear is also presented.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe results from following: the new proposed EHSAPT, the existing high order sandwich panel theory HSAPT (from literature), three variants FOSD theory, and Classical theory are compared with Elasticity which serves as a benchmark in assessing the accuracy of the various sandwich panel theories.\u0026nbsp; The cases examined are transverse static loads and free vibration of simply supported curved sandwich panels, for which a closed form elasticity solution is formulated. It is shown that the new EHSAPT is the most accurate among other presented theories with the logarithmic formulation is more accurate than the polynomial.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAdvanced High Order Theories and Elasticity Solutions for Curved Sandwich Composite Panels\u201d"}],"uid":"33975","created_gmt":"2017-04-14 15:35:05","changed_gmt":"2017-04-14 15:35:05","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-28T15:00:00-04:00","event_time_end":"2017-04-28T17:00:00-04:00","event_time_end_last":"2017-04-28T17:00:00-04:00","gmt_time_start":"2017-04-28 19:00:00","gmt_time_end":"2017-04-28 21:00:00","gmt_time_end_last":"2017-04-28 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590400":{"#nid":"590400","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Wei Sun","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EWei Sun\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Prof. P. Tsiotras\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECo-Advisor: Prof. E. A. Theodorou\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Pursuit Evasion and Differential Games under Uncertainties\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, April 27\u003Csup\u003Eth\u003C\/sup\u003E, 2017 @ 10:00 a.m.\u003Cbr \/\u003E\r\nMontgomery Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E:\u003Cbr \/\u003E\r\nDifferential games involves multi-person decision making under conflicts in the context of dynamical systems. It has found its application on a large range of areas, including aeronautics, biology, ecology, economics, engineering, management science, operations research, etc. The decisions made by the players that join the differential game are susceptible to uncertainties that are pervasive in realistic differential game scenarios. The uncertainties that enters the system can be divided into three main categories, namely, external\/environmental uncertainties, internal\/dynamical uncertainties and observation uncertainties. In this research, we provide methods to deal with environmental and dynamic uncertainties. In particular, we solve pursuit evasion games under external flow fields to demonstrate how to cope with differential games under environmental uncertainties. We first recast the multiplayer pursuit evasion problem into a relay pursuer-target assignment problem and utilize generalized Voronoi diagrams to guide the assignment. Then we present an analytical approach to solve a pursuit evasion game in a linear flow field and a numerical approach that is based on reachability sets and the level set method to deal with pursuit evasion games in general flow fields. Extension of our numerical approach towards 3-dimensional space and stochastic environmental disturbance are also discussed. Finally, we present an efficient algorithm to solve general differential game problems and extend to cases subject to stochastic dynamics to handle dynamical uncertainties.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cPursuit Evasion and Differential Games under Uncertainties\u201d"}],"uid":"33975","created_gmt":"2017-04-14 15:08:01","changed_gmt":"2017-04-14 15:08:01","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-27T11:00:00-04:00","event_time_end":"2017-04-27T13:00:00-04:00","event_time_end_last":"2017-04-27T13:00:00-04:00","gmt_time_start":"2017-04-27 15:00:00","gmt_time_end":"2017-04-27 17:00:00","gmt_time_end_last":"2017-04-27 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"404511":{"#nid":"404511","#data":{"type":"event","title":"Live Q \u0026 A video chat with the pilot of the Solar Impulse","body":"","field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EYou are invited\u0026nbsp; to join us on a Video Conference Call with the pilot of the Solar Impulse, the first fixed-wing vehicle to attempt to circumnavigate the Earth using solar power only.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EWHEN\u003C\/strong\u003E: Friday, May 22, @ 2 p.m.\u003Cbr \/\u003E\u003Cstrong\u003EWHERE:\u003C\/strong\u003E The Weber Building CoVE\u003Cbr \/\u003EBe one of the lucky attendees who will get to ask the pilot a question LIVE. Just send us your question by Thursday May 21. We will choose from among all submissions.\u0026nbsp; Send your question to \u003Cstrong\u003Ekathleen.moore@ae.gatech.ed\u003C\/strong\u003Eu\u003Cbr \/\u003E\u003Cbr \/\u003E\u003Cstrong\u003EWhat is the Solar Impulse?\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EIt is a a long-range experimental solar-powered aircraft that has been privately financed by Andre Borschberg, and Bertrand Piccard. Its goal is tobe the first-ever piloted, fixed-wing aircraft that uses only solar power to\u0026nbsp; circumnavigate the Earth.\u0026nbsp; It started its journey in Abu Dabai on March 9. When GT-AE connects with it, the Solar Impulse will be making its way to New York from Hawaii.\u003Cbr \/\u003E\u003Cbr \/\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"GT-AE is hosting a live video chat with the pilot of the Solar Impulse while it is in flight"}],"uid":"27836","created_gmt":"2015-05-14 14:55:41","changed_gmt":"2017-04-13 21:19:18","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-05-22T15:00:00-04:00","event_time_end":"2015-05-22T16:00:00-04:00","event_time_end_last":"2015-05-22T16:00:00-04:00","gmt_time_start":"2015-05-22 19:00:00","gmt_time_end":"2015-05-22 20:00:00","gmt_time_end_last":"2015-05-22 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"126111","name":"GT-AE"},{"id":"168046","name":"Solar Impulse"},{"id":"168047","name":"solar-powered"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"404561":{"#nid":"404561","#data":{"type":"event","title":"CANCELLED - Live video chat with the pilot of the Solar Impulse","body":[{"value":"\u003Cp class=\u0022p1\u0022\u003EThe School of Aerospace Engineering will host a live video chat with the pilot of the Solar Impulse, the first fixed-wing aircraft to attempt to circumnavigate the Earth using only solar power. The pilot will be enroute between Hawaii and NY \u0026nbsp;when we link with him via a live video chat. If you have a question for him, submit it to \u003Ca href=\u0022mailto:kathleen.moore@ae.gatech.edu\u0022\u003Ekathleen.moore@ae.gatech.edu\u003C\/a\u003E by May 21 and we may choose you to deliver your question during this exciting chat.\u003C\/p\u003E\u003Cp class=\u0022p2\u0022\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJoin us for a live video chat with the pilot of the Solar Impulse\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Join us for a live video chat with the pilot of the Solar Impulse"}],"uid":"27469","created_gmt":"2015-05-14 15:28:36","changed_gmt":"2017-04-13 21:19:18","author":"Kristen Bailey","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-05-22T15:00:00-04:00","event_time_end":"2015-05-22T16:00:00-04:00","event_time_end_last":"2015-05-22T16:00:00-04:00","gmt_time_start":"2015-05-22 19:00:00","gmt_time_end":"2015-05-22 20:00:00","gmt_time_end_last":"2015-05-22 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1182","name":"General"},{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp class=\u0022p2\u0022\u003EKathleen Moore\u003Cbr \/\u003E\u003Cspan class=\u0022s2\u0022\u003E\u003Ca href=\u0022mailto:kathleen.moore@ae.gatech.edu\u0022\u003Ekathleen.moore@ae.gatech.edu\u003Cbr \/\u003E\u003C\/a\u003E\u003C\/span\u003E404.894.3003\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"415881":{"#nid":"415881","#data":{"type":"event","title":"AE Presents: Dr. Philip Pearce","body":[{"value":"\u003Cp\u003EThe School of Aerospace Engineering\u0026nbsp; will present \u003Cstrong\u003EDr. Philip Pearce\u003C\/strong\u003E who will give a lecture entitled \u003Cstrong\u003E\u0022The Effect of Gravity on Flame Propagation in Inhomogeneous Mixtures\u0022\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EIn many practical situations involving a propagating flame, inhomogeneities are present in the mixture through which the flame propagates. These inhomogeneities can be caused by fluctuations or stratifications in the temperature, the composition or the flow field. This talk will be concerned with situations where the concentrations of fuel and oxidiser are stratified. In these circumstances, ignition leads to the propagation of a so-called triple flame, which was first observed in the laboratory by Phillips in 1965 [1]. Using both analytical and numerical methods, I will describe how gravity affects the propagation of a triple flame and the stability of its trailing diffusion flame, causing instabilities like those that can be clearly seen in one of the first images taken by Phillips.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EAbout the speaker:\u003Cbr \/\u003E\u003C\/strong\u003EDr. Philip Pearce received his master\u0027s in mathematics and his Ph.D in applied mathematics at the University of Manchester. Since January 2015, Pearce has been an Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester will give a lecture entitled \u0022The Effect of Gravity on FLame Propagation in Inhomogeneous Mixtures\u0022"}],"uid":"27836","created_gmt":"2015-06-17 12:51:47","changed_gmt":"2017-04-13 21:19:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-06-30T12:00:00-04:00","event_time_end":"2015-06-30T13:00:00-04:00","event_time_end_last":"2015-06-30T13:00:00-04:00","gmt_time_start":"2015-06-30 16:00:00","gmt_time_end":"2015-06-30 17:00:00","gmt_time_end_last":"2015-06-30 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"},{"id":"154011","name":"Aerospace Engineering  Seminars"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"415891":{"#nid":"415891","#data":{"type":"event","title":"AE Presents: Dr. Philip Pearce","body":[{"value":"\u003Cp\u003EThe School of Aerospace Engineering\u0026nbsp; will present \u003Cstrong\u003EDr. Philip Pearce\u003C\/strong\u003E who will give a lecture entitled \u003Cstrong\u003E\u0022The Effect of Gravity on Flame Propagation in Inhomogeneous Mixtures\u0022\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EIn many practical situations involving a propagating flame, inhomogeneities are present in the mixture through which the flame propagates. These inhomogeneities can be caused by fluctuations or stratifications in the temperature, the composition or the flow field. This talk will be concerned with situations where the concentrations of fuel and oxidiser are stratified. In these circumstances, ignition leads to the propagation of a so-called triple flame, which was first observed in the laboratory by Phillips in 1965 [1]. Using both analytical and numerical methods, I will describe how gravity affects the propagation of a triple flame and the stability of its trailing diffusion flame, causing instabilities like those that can be clearly seen in one of the first images taken by Phillips.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EAbout the speaker:\u003Cbr \/\u003E\u003C\/strong\u003EDr. Philip Pearce received his master\u0027s in mathematics and his Ph.D in applied mathematics at the University of Manchester. Since January 2015, Pearce has been an Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester will give a lecture entitled \u0022The Effect of Gravity on FLame Propagation in Inhomogeneous Mixtures\u0022"}],"uid":"27836","created_gmt":"2015-06-17 12:51:50","changed_gmt":"2017-04-13 21:19:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-06-30T12:00:00-04:00","event_time_end":"2015-06-30T13:00:00-04:00","event_time_end_last":"2015-06-30T13:00:00-04:00","gmt_time_start":"2015-06-30 16:00:00","gmt_time_end":"2015-06-30 17:00:00","gmt_time_end_last":"2015-06-30 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"},{"id":"154011","name":"Aerospace Engineering  Seminars"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"415901":{"#nid":"415901","#data":{"type":"event","title":"AE Presents: Dr. Philip Pearce","body":[{"value":"\u003Cp\u003EThe School of Aerospace Engineering\u0026nbsp; will present \u003Cstrong\u003EDr. Philip Pearce\u003C\/strong\u003E who will give a lecture entitled \u003Cstrong\u003E\u0022The Effect of Gravity on Flame Propagation in Inhomogeneous Mixtures\u0022\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EIn many practical situations involving a propagating flame, inhomogeneities are present in the mixture through which the flame propagates. These inhomogeneities can be caused by fluctuations or stratifications in the temperature, the composition or the flow field. This talk will be concerned with situations where the concentrations of fuel and oxidiser are stratified. In these circumstances, ignition leads to the propagation of a so-called triple flame, which was first observed in the laboratory by Phillips in 1965 [1]. Using both analytical and numerical methods, I will describe how gravity affects the propagation of a triple flame and the stability of its trailing diffusion flame, causing instabilities like those that can be clearly seen in one of the first images taken by Phillips.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EAbout the speaker:\u003Cbr \/\u003E\u003C\/strong\u003EDr. Philip Pearce received his master\u0027s in mathematics and his Ph.D in applied mathematics at the University of Manchester. Since January 2015, Pearce has been an Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellow at the University of Manchester will give a lecture entitled \u0022The Effect of Gravity on FLame Propagation in Inhomogeneous Mixtures\u0022"}],"uid":"27836","created_gmt":"2015-06-17 12:54:08","changed_gmt":"2017-04-13 21:19:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-06-30T12:00:00-04:00","event_time_end":"2015-06-30T13:00:00-04:00","event_time_end_last":"2015-06-30T13:00:00-04:00","gmt_time_start":"2015-06-30 16:00:00","gmt_time_end":"2015-06-30 17:00:00","gmt_time_end_last":"2015-06-30 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"441581":{"#nid":"441581","#data":{"type":"event","title":"The Gebhardt Lecture Series Presents: Eric Gebhardt","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E\u0026nbsp; 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\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; You are invited to a special talk by\u003C\/em\u003E\u003C\/p\u003E\u003Ch3\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Donald G. James\u003C\/h3\u003E\u003Cp\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u003Cstrong\u003EAssociate Administrator for NASA\u0027s \u003C\/strong\u003E\u003Cbr \/\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Office of Education\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Cstrong\u003E Overview of NASA Education \u003C\/strong\u003E\u003Cbr \/\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Programs \u0026amp; Opportunities\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Cstrong\u003EWednesday, September 9, 11 a.m.\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Cstrong\u003EThe CoVE Auditorium @the Weber Building\u003C\/strong\u003E\u003Cbr \/\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Refreshments served\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThis event is sponsored by the Daniel Guggenheim School of Aerospace Engineering and the Georgia Space Grant Consortium.\u003C\/p\u003E\u003Cp\u003EJames chairs NASA\u2019s Education Coordinating Committee, an agency-wide collaborative structure that maximizes NASA\u0027s ability to manage and implement its education portfolio. He is the United States representative on the International Space Education Board, a global collaboration in space education between NASA, the Canadian Space Agency, the European Space Agency, the Japan Aerospace Exploration Agency and the Centre National d\u0027\u00c9tudes Spatiales. James also works with the Office of Science and Technology Policy\u0027s Committee on STEM (Co-STEM) to continue coordinating and leveraging NASA\u0027s education programs, opportunities and offerings with members representing other federal agencies.About the speaker\u003C\/p\u003E\u003Cp\u003EDonald G. James is NASA\u0027s associate administrator for the Office of Education. In this position, James is responsible for developing and implementing NASA\u0027s education programs that strengthen student involvement and public awareness about its scientific goals and missions. He leads the agency in inspiring interest in science, technology, engineering and mathematics, or STEM, through NASA\u0027s unique mission, workforce, facilities, research and innovations.\u003C\/p\u003E\u003Cp\u003EJames has served NASA for more than 30 years in numerous capacities including public affairs, human capital management, and strategic communications. Prior to his current position, James was the director of the Strategic Communications and Education Directorate at NASA\u0027s Ames Research Center in Mountain View, California. \u003Cbr \/\u003EJames received an undergraduate degree in international relations from the University of Southern California in Los Angeles and a Master of Arts degree in economic development and public administration from the American University in Washington.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Mr. Donald G. James, associate NASA administrator for education, will give a talk"}],"uid":"27456","created_gmt":"2015-08-28 16:18:33","changed_gmt":"2017-04-13 21:18:31","author":"Britanny Grace","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-09-09T12:00:00-04:00","event_time_end":"2015-09-09T13:00:00-04:00","event_time_end_last":"2015-09-09T13:00:00-04:00","gmt_time_start":"2015-09-09 16:00:00","gmt_time_end":"2015-09-09 17:00:00","gmt_time_end_last":"2015-09-09 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"139761","name":"Donald James"},{"id":"408","name":"NASA"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"442181":{"#nid":"442181","#data":{"type":"event","title":"Rolls Royce Information Session","body":[{"value":"\u003Ch5\u003E\u003Cem\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;You are invited to a\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h5\u003E\u003Ch5\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Recruitment Information Session\u003C\/strong\u003E\u003C\/h5\u003E\u003Ch5\u003E\u003Cem\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;with representatives from\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h5\u003E\u003Ch2\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Rolls Royce\u003C\/h2\u003E\u003Ch5\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Thursday, September 10\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/h5\u003E\u003Ch5\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; 3:30 - 5:30 p.m.\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/h5\u003E\u003Ch5\u003E\u003Cstrong\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;The ASDL\u0026nbsp;CoVE\u003C\/strong\u003E\u003C\/h5\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003ERolls Royce is looking for graduate students and undergraduates for a variety of positions, co-ops, internships. Applicants must be authorized to work in the US without any type of sponsorship.\u0026nbsp; They should have a GPA of at least 3.\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EA select few attendees will be interviewed on Friday, so bring your resumes.\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EGot Questions?\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EVisit the\u0026nbsp;\u003C\/strong\u003E\u003Ca href=\u0022http:\/\/www.rolls-royce.com\/careers\u0022\u003E\u003Cstrong\u003ERolls Royce career site\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Grads and undergrads encouraged to bring resumes to this recruitment event. Select few will be interviewed Sept. 11"}],"uid":"27456","created_gmt":"2015-08-31 11:29:21","changed_gmt":"2017-04-13 21:18:31","author":"Britanny Grace","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-09-10T16:30:00-04:00","event_time_end":"2015-09-10T18:30:00-04:00","event_time_end_last":"2015-09-10T18:30:00-04:00","gmt_time_start":"2015-09-10 20:30:00","gmt_time_end":"2015-09-10 22:30:00","gmt_time_end_last":"2015-09-10 22:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"100921","name":"ASDL"},{"id":"139861","name":"Rolls Royce"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"450631":{"#nid":"450631","#data":{"type":"event","title":"ECE \u0026 AE Majors - Georgia Tech-Lorraine Info Session","body":[{"value":"\u003Cp class=\u0022p1\u0022\u003EContinue the momentum towards your degree while studying at Georgia\u0027s Tech\u0027s campus in Metz, France. This info session is targeted to ECE and AE majors although all are welcome. Take courses in your major, engineering core courses, and other electives. All courses are taught in English by Georgia Tech faculty. Come learn more about the program and apply now for Spring and Summer semesters.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ELearn about spending a semester at Georgia Tech-Lorraine.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Learn about spending a semester at Georgia Tech-Lorraine."}],"uid":"27469","created_gmt":"2015-09-23 09:26:23","changed_gmt":"2017-04-13 21:18:12","author":"Kristen Bailey","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-09-24T12:00:00-04:00","event_time_end":"2015-09-24T13:00:00-04:00","event_time_end_last":"2015-09-24T13:00:00-04:00","gmt_time_start":"2015-09-24 16:00:00","gmt_time_end":"2015-09-24 17:00:00","gmt_time_end_last":"2015-09-24 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"58085":{"id":"58085","type":"image","title":"Georgia Tech Lorraine","body":null,"created":"1449176204","gmt_created":"2015-12-03 20:56:44","changed":"1475894510","gmt_changed":"2016-10-08 02:41:50","alt":"Georgia Tech Lorraine","file":{"fid":"190760","name":"gt.lorraine.jpg","image_path":"\/sites\/default\/files\/images\/gt.lorraine_0.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/gt.lorraine_0.jpg","mime":"image\/jpeg","size":3709815,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/gt.lorraine_0.jpg?itok=9hswBVQG"}}},"media_ids":["58085"],"related_links":[{"url":"http:\/\/lorraine.gatech.edu\/","title":"Georgia Tech Lorraine Program"}],"groups":[{"id":"1182","name":"General"},{"id":"1239","name":"School of Aerospace Engineering"},{"id":"1255","name":"School of Electrical and Computer Engineering"}],"categories":[],"keywords":[{"id":"6317","name":"AE"},{"id":"2435","name":"ECE"},{"id":"117961","name":"gt-lorraine"},{"id":"1589","name":"OIE"},{"id":"166843","name":"Study Abroad"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"},{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp class=\u0022p2\u0022\u003EAndrea Gappell\u003C\/p\u003E\u003Cp class=\u0022p3\u0022\u003E\u003Cspan class=\u0022s1\u0022\u003E\u003Ca href=\u0022mailto:andrea.gappell@gtl.gatech.edu\u0022\u003E\u003Cspan class=\u0022s2\u0022\u003Eandrea.gappell@gtl.gatech.edu\u003C\/span\u003E\u003C\/a\u003E\u003C\/span\u003E\u003C\/p\u003E\u003Cp class=\u0022p2\u0022\u003E404-385-1865\u003C\/p\u003E\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"463231":{"#nid":"463231","#data":{"type":"event","title":"AIAA\u0027s Sandra Magnus to speak","body":[{"value":"\u003Cp\u003EDr. Sandra Magnus, a GT alumnus, former astronaut, and current executive director for the American Institute of Aeronautics and Astronautics, will give a talk about career success -- something she knows pretty well.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EStudents from all majors are invited to this talk, which will take place at 11 a.m. in the Guggenheim Building, Room 442. Refreshments provided\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Dr. Magnus, a GT alumna, will give a talk entitled \u0022Everything I Needed to Know to Succeed, I Learned in Kindergarten\u0022"}],"uid":"27836","created_gmt":"2015-10-27 16:56:03","changed_gmt":"2017-04-13 21:17:49","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-10-29T16:00:00-04:00","event_time_end":"2015-10-29T17:00:00-04:00","event_time_end_last":"2015-10-29T17:00:00-04:00","gmt_time_start":"2015-10-29 20:00:00","gmt_time_end":"2015-10-29 21:00:00","gmt_time_end_last":"2015-10-29 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"hg_media":{"68726":{"id":"68726","type":"image","title":"Astronaut Sandra Magnus","body":null,"created":"1449177201","gmt_created":"2015-12-03 21:13:21","changed":"1475894597","gmt_changed":"2016-10-08 02:43:17","alt":"Astronaut Sandra Magnus","file":{"fid":"193343","name":"sandra_magnus.jpg","image_path":"\/sites\/default\/files\/images\/sandra_magnus_0.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/sandra_magnus_0.jpg","mime":"image\/jpeg","size":136349,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/sandra_magnus_0.jpg?itok=AGkj8iJo"}}},"media_ids":["68726"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2576","name":"AIAA"},{"id":"103571","name":"american institute of aeronautics and astronautics"},{"id":"145871","name":"Magnus"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"463241":{"#nid":"463241","#data":{"type":"event","title":"Aerospace Engineering Trivia Night","body":[{"value":"\u003Cp\u003ESign up for the Aerospace Engineering Trivia Night: \u003Ca href=\u0022http:\/\/goo.gl\/forms\/rVjr2eOgE5\u0022 target=\u0022_self\u0022\u003Ehttp:\/\/goo.gl\/forms\/rVjr2eOgE5\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003EThe students of Sigma Gamma Tau are organizing a Trivia Night to test your knowledge of all things aerospace engineering. Faculty and students welcome. And they\u0027ve enlisted Dr. Sandra Magnus - a former astronaut and the executive director of the American Institute of Aeronautics \u0026amp; Astronautics -- to serve as the MC.\u003C\/p\u003E\u003Cp\u003E$3 before Oct. 29 and $5 at the door\u003C\/p\u003E\u003Cp\u003EYou\u0027ll have to bring the smarts. Pizza provided by SGT.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAIAA Executive Director Sandra Magnus will serve as the MC for this Aerospace Engineering Trivia Night, where teams of students and faculty will compete for the top prize -- $60 -- and bragging rights, of course. $3 before 10\/29; $5 at the door. Pizza provided.\u003C\/p\u003E\u003Cp\u003ESign up by visiting \u003Ca href=\u0022http:\/\/goo.gl\/forms\/rVjr2eOgE5\u0022 target=\u0022_self\u0022\u003Ehttp:\/\/goo.gl\/forms\/rVjr2eOgE5\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Sigma Gamma Tau invites any student or faculty interested in matching their wits on aerospace engineering trivia"}],"uid":"27836","created_gmt":"2015-10-27 17:09:13","changed_gmt":"2017-04-13 21:17:49","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-10-29T23:30:00-04:00","event_time_end":"2015-10-30T02:00:00-04:00","event_time_end_last":"2015-10-30T02:00:00-04:00","gmt_time_start":"2015-10-30 03:30:00","gmt_time_end":"2015-10-30 06:00:00","gmt_time_end_last":"2015-10-30 06:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"},{"id":"1506","name":"faculty"},{"id":"166847","name":"students"},{"id":"25381","name":"trivia"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003ESign up here: \u003Ca title=\u0022http:\/\/goo.gl\/forms\/rVjr2eOgE5\u0022 href=\u0022http:\/\/goo.gl\/forms\/rVjr2eOgE5\u0022 target=\u0022_self\u0022\u003Ehttp:\/\/goo.gl\/forms\/rVjr2eOgE5\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"463251":{"#nid":"463251","#data":{"type":"event","title":"Technical Talk: Understanding \u0026 Designing Soft Solids from the Bottom Up","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EDr. Lopez-Pamies will give a talk, entitled\u003C\/strong\u003E\u003Cbr \/\u003E\u003Cstrong\u003E\u0022Understanding \u0026amp; Designing Soft Solids from the Bottom UP: Methods \u0026amp; Applications\u0022\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EBuilding Soft solids \u2014 that is, solids that are able to undergo large reversible deformations in response to low-intensity stimuli \u2014 are used pervasively in commercial applications, and, in recent years, have demonstrated substantial promise to enable new high-end technologies for application in a broad range of fields. Examples include muscle-like actuators, self-repairing structures, and energy harvesters. Almost invariably, these material systems possess complex microstructures (at the micro and nano length scales) which, to a great extent, dictate their mechanical and physical properties. This prompts the need to understand the connection between the underlying microstructure of soft solids and their macroscopic behavior and stability, and how the latter may be enhanced with changes in the former.\u003Cbr \/\u003E\u003Cbr \/\u003EIn this talk, I will present two theories that permit to describe, explain, and predict the macroscopic behavior of a broad class of soft solids directly in terms of their microscopic behavior. The central idea of the first approach is the construction of \u201csynthetic\u201d microstructures. The idea of the second approach, on the other hand, is based on the development of variational principles utilizing the notion of a \u201ccomparison medium\u201d. In addition to providing constitutive models for the macroscopic response, these microscopic theories provide analytical means to investigate the development of (geometric and material) instabilities and therefore the possible onset of failure, a major limiting factor in the design of any material system. Following the presentation of the theories, I will show applications to dielectric elastomer composites and cavitation instabilities.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EDr. Lopez-Pamies is\u0026nbsp; an associate professor of civil \u0026amp; environmental engineering at the University of Illinois, Urbana-Champaign\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Dr. Oscar Lopez-Pamies will speak"}],"uid":"27836","created_gmt":"2015-10-27 17:16:07","changed_gmt":"2017-04-13 21:17:49","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-10-29T18:00:00-04:00","event_time_end":"2015-10-29T19:00:00-04:00","event_time_end_last":"2015-10-29T19:00:00-04:00","gmt_time_start":"2015-10-29 22:00:00","gmt_time_end":"2015-10-29 23:00:00","gmt_time_end_last":"2015-10-29 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"464511":{"#nid":"464511","#data":{"type":"event","title":"Gas-Turbine Heat Transfer: Challenges and Opportunities","body":[{"value":"\u003Cp class=\u0022p1\u0022\u003EDr. Tom I-P Shih will be the featured lecturer, Thursday, November 5, at 3:30 p.m. in the Montgomery Knight Building Room 317. Dr. Shih will give a talk entitled \u0022Gas-Turbine Heat Transfer:Challenges and Opportunities.\u0022\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EGT-AE proudly presents Purdue University\u0027s Dr. Tom Shih\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"GT-AE proudly presents Purdue University\u0027s Dr. Tom Shih"}],"uid":"27469","created_gmt":"2015-10-30 10:06:45","changed_gmt":"2017-04-13 21:17:47","author":"Kristen Bailey","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-11-05T14:30:00-05:00","event_time_end":"2015-11-05T15:30:00-05:00","event_time_end_last":"2015-11-05T15:30:00-05:00","gmt_time_start":"2015-11-05 19:30:00","gmt_time_end":"2015-11-05 20:30:00","gmt_time_end_last":"2015-11-05 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp class=\u0022p1\u0022\u003EKathleen Moore\u003Cbr \/\u003E\u003Ca href=\u0022mailto:kathleen.moore@ae.gatech.edu\u0022\u003Ekathleen.moore@ae.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"479091":{"#nid":"479091","#data":{"type":"event","title":"Gebhardt Lecture Series Presents: Dr. Zhigang Suo","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout Dr. Suo\u0027s Gebhardt Lecture:\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003EMachines in engineering use mostly hard materials, whereas machines in nature are often soft.\u0026nbsp; This difference has been an inspiration for the nascent field of soft machines.\u0026nbsp; What does softness impart to the life of animals and plants?\u0026nbsp;\u0026nbsp; Softness enables deformation, and deformation provides functions.\u0026nbsp; Familiar examples include the beating of the heart, the sound shaped by the vocal folds, and the flapping of the wing.\u0026nbsp; In soft machines, the large deformation enable soft materials to behave as transducers, connecting multiple stimuli to multiple functions.\u0026nbsp; How do molecular processes enable new classes of actuators and sensors?\u0026nbsp; How efficiently can materials convert information from one form to another?\u0026nbsp; These questions are stimulating new and exciting developments at the interface between science and engineering.\u0026nbsp; This talk highlights the behavior of soft materials that enables the creation of soft machines.\u0026nbsp; Examples include highly stretchable and transparent devices that mimic the functions of muscles, skins and axons.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EHarvard University Professor Zhigang Suo will give a talk entitled \u0022Soft Machines\u0022 which will explore the behavior of soft materials that enables the creation of soft machines. Sponsored by the GT-AE Gebhardt Distinguished Lecture series. Open to all\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Harvard University Professor Zhigang Suo will give a talk entitled \u0022Soft Machines\u0022"}],"uid":"27836","created_gmt":"2015-12-15 14:34:37","changed_gmt":"2017-04-13 21:17:25","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-01-14T19:30:00-05:00","event_time_end":"2016-01-14T20:30:00-05:00","event_time_end_last":"2016-01-14T20:30:00-05:00","gmt_time_start":"2016-01-15 00:30:00","gmt_time_end":"2016-01-15 01:30:00","gmt_time_end_last":"2016-01-15 01:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1237","name":"College of Engineering"},{"id":"1239","name":"School of Aerospace Engineering"},{"id":"154011","name":"Aerospace Engineering  Seminars"}],"categories":[],"keywords":[{"id":"168151","name":"Aerospace engineering; deformation; soft machines;"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"551961":{"#nid":"551961","#data":{"type":"event","title":"Doctoral Defense: Aaron M. Schinder","body":[{"value":"You are in\u003Cul\u003E\u003Cli\u003E\u003Ca href=\u0022http:\/\/ae.gatech.edu\/\u0022\u003EHom\u003C\/a\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EThesis Defense by \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EAaron M. Schinder \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EAdvisor: Prof. Mitchell L.R. Walker, Prof Julian J. Rimoli\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EInvestigation of Hall Effect Thruster \u003Cbr \/\u003E Channel Wall Erosion Mechanisms \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E10 a.m. - 12 noon Tuesday August 2\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003EMontgomery Knight Building\u0026nbsp; Room 317 \u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E The primary life-limiting mechanism for Hall effect thrusters (HETs) is the plasma erosion of the discharge channel wall. Over the course of tens of thousands of hours, energetic ions sputter material from the annular discharge channel wall of the HET, wearing away the material in the 1-2 cm near the exit plane of the thruster. If the channel wall is completely worn away in these areas, the magnetic circuit is exposed, and continued operation of the thruster will lead to the ejection of ferrous material into the spacecraft environment and eventual failure of the magnetic circuit. Qualifying HETs for a minimum 1.5 times desired mission life is an expensive process requiring tens of thousands of hours of chamber time. Computational modeling of thruster lifetime can make predictions about the average erosion depth, but present models cannot explain certain features that appear during testing. One such feature is the anomalous erosion ridge phenomenon in HETs. In order to improve HET life modeling, a better understanding of the formation of features during plasma erosion is needed.\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EIn this work, an investigation into the details of the plasma erosion of materials is conducted. The way in which the material microstructure and the mechanical stress in materials modify the process of plasma erosion is studied, with experiments and computational modeling. A 3D raytracing model of the development of surfaces in a complex heterogeneous material is created. The model reproduces the development of surface features observed in SEM microscopy of the eroded AFRL\/UM P5 channel wall. SEM imaging of borosil reveals a complex heterogeneous microstructure composed of boron nitride grains in a silica matrix. The role of the microstructure in the development of observed erosion features is explored. The strain relief hypothesis, which proposes that the presence of mechanical stress in materials will lead to the existence of unstable surface modes under erosion, is investigated. The SRH predicts that surface features with wavelengths dependent on applied mechanical stress will grow during erosion.\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EAn experiment to test the dependence of the plasma erosion process on the presence of mechanical stress in materials is designed and conducted. Two materials, amorphous fused silica and M26 borosil, are placed under varying amounts of mechanical stress up to 25 MPa and exposed to argon plasma for 12 hours. Microscopy and detailed surface statistics are collected before and after each exposure. During each exposure, a pair of samples: one under a compressive mechanical load, and the other unloaded, are exposed.\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EThe results of these experiments reveal that different mechanisms for each material lead to the development of complex surface patterns. For fused silica, a complex cell pattern is generated from initial roughness present in the surface. The development of this cell pattern can be explained as being the result of the angle-dependence of the sputtering yield of silica. For M26 borosil, it is found that the difference in the sputtering yield between the boron nitride and silica components of the material is the dominant mechanism leading to the development of surface features. For both M26 and fused silica samples, for applied loads of up to 25 MPa, no dependence of the development of the surface features on the mechanical stress has been detected.\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EThis work has found that the ion impact angles, the initial surface structure in the case of fused silica, and the heterogeneous nature of borosil composites all play a role in the generation of microstructural surface features during plasma erosion. However, no evidence has been found for the sensitivity of the plasma erosion of M26 and fused silica to mechanical stresses of up to 25 MPa.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee: \u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EProf. Mitchell L. R. Walker, School of Aerospace Engineering\u003Cbr \/\u003E Prof. Julian J. Rimoli, School of Aerospace Engineering\u003Cbr \/\u003E Dr. John Yim, NASA Glenn Research Center\u003Cbr \/\u003E Prof. Sven Simon, School of Earth and Atmospheric Sciences\u003Cbr \/\u003E Dr. W. Jud Ready, Georgia Tech Research Institute\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Doctoral student Aaron Schinder will defend his dissertation: \u0022Investigation of Hall Effect Thruster Channel Wall Erosion Mechanisms\u0022"}],"uid":"27836","created_gmt":"2016-07-11 15:19:45","changed_gmt":"2017-04-13 21:15:25","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-02T11:00:00-04:00","event_time_end":"2016-08-02T13:00:00-04:00","event_time_end_last":"2016-08-02T13:00:00-04:00","gmt_time_start":"2016-08-02 15:00:00","gmt_time_end":"2016-08-02 17:00:00","gmt_time_end_last":"2016-08-02 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"558121":{"#nid":"558121","#data":{"type":"event","title":"Doctoral Defense: Aharon Z. Karon","body":[{"value":"\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003Eby\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EAharon Z. Karon\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EAdvisor: Prof. Krishan K. Ahuja\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EPotential Factors Responsible for Discrepancies in Jet Noise Measurements of Different Studies\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003E10:30 a.m., Tuesday, August 16\u003C\/strong\u003E\u003Cstrong\u003E\u0026nbsp;\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E Montgomery Knight Building -- Room 317\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EABSTRACT: \u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EJet noise measurements have been acquired at many anechoic jet-facilities around the world. These measurements have been used to form the basis for prediction schemes and to understand the generation and radiation of jet noise. Often, when jet noise measurements from different jet-facilities that are thought to be acquired at or corrected to similar conditions are compared, differences are observed in the spectra. These comparisons are typically performed on the basis of the same nozzle-exit diameter, jet velocity, microphone distance from the jet flow, and ambient conditions. This phenomenon has spurred much discussion in the aeroacoustics community, with some even claiming that some of the measurements are contaminated with rig-noise. This study investigates following four factors that can be responsible for the differences in jet noise measurements: (1) rig noise contamination, (2) the jet\u2019s Reynolds number, (3) the nozzle-exit boundary layer of the jet, and (4) reflections and shielding from surfaces inside the anechoic jet-facility.\u003C\/p\u003E\u003Cp\u003EFirst, the Doubling-Diameter Method, a scheme used to detect rig-noise contamination in jet-noise measurements, is verified and used on jet noise measurements acquired in the Georgia Tech Research Institute (GTRI) Anechoic Jet-Facility to verify the cleanliness of the jet noise measurements. Second, the effect of Reynolds number of the jet is investigated qualitatively and quantitatively for its effect on jet noise measurements. Third, the effect of the nozzle-exit boundary layer on jet noise measurements is categorized qualitatively and quantitatively. In addition, a potential correction is developed that can be used to account for the differences in jet noise measurements from jets with different nozzle-exit boundary layer states. Finally, surfaces inside the anechoic chamber itself, such as, the plenum chamber, and a secondary nozzle are investigated as potential reflectors and shields that can cause waviness and modifications in the jet noise spectra, respectively.\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee: \u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EProf. Krishan K. Ahuja, School of Aerospace Engineering\u003Cbr \/\u003EProf. Jechiel Jagoda, School of Aerospace Engineering\u003Cbr \/\u003EProf. Lakshmi Sankar, School of Aerospace Engineering\u003Cbr \/\u003EDr. Donald K. Nance, NASA Marshall Space Flight Center\u003Cbr \/\u003EDr. Joseph Gavin, Gulfstream\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAharon Z. Karon will defend his doctoral dissertation before a committee to include his advisor, Prof. Krishan K. Ahuja\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Potential Factors Responsible for Discrepancies in Jet Noise Measurements of Different Studies"}],"uid":"27836","created_gmt":"2016-08-02 15:21:23","changed_gmt":"2017-04-13 21:15:15","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-16T15:30:00-04:00","event_time_end":"2016-08-16T15:30:00-04:00","event_time_end_last":"2016-08-16T15:30:00-04:00","gmt_time_start":"2016-08-16 19:30:00","gmt_time_end":"2016-08-16 19:30:00","gmt_time_end_last":"2016-08-16 19:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003Ekathleen moore\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"558131":{"#nid":"558131","#data":{"type":"event","title":"Doctoral Defense: John W. Dykes","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to a\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E \u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E\u003Cem\u003Eby\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EJohn W. Dykes\u003Cbr \/\u003EAdvisor: Prof. Dimitri Mavris\u003Cbr \/\u003E9 a.m., Monday, August 8\u003Cbr \/\u003EWeber Building - Collaborative Visualization Environment (CoVE)\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003ETEMPUS: A Methodology For Model-Based Robust-Optimal Design of Time-Dynamic System Identification Experiments Using Variational Asymptotic Expansions\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003Cbr \/\u003E The development of appropriate flight tests has proven to be a critical piece in the design process of many revolutionary next-generation aerospace vehicles.\u0026nbsp; For example, in the case of hypersonic vehicles with air-breathing SCRAMjet engines, sophisticated computational analyses have been developed, requiring extensive validation and calibration. The current state of ground testing facilities has not been able to accommodate these demands, due to the inability to replicate hypersonic flow conditions with sufficient accuracy, and these deficiencies have put more demand and pressure on flight experiments, which have historically proven to produce the highest quality results but at the potential price of extreme complexity and expense.\u0026nbsp; As observed in the case of hypersonic SCRAMjet vehicle flight testing, high expense has led to conservative, risk-averse experiments which often yield little gain in knowledge.\u003C\/p\u003E\u003Cp\u003EThere is an entire discipline devoted to the process of design and information extraction from aerospace-type experiments known as aircraft system identification (SysID), which fuses three strongly interdependent topics: (1) instrumentation and measurement systems, (2) experiment design, and (3) statistical estimation. At its essence, SysID attempts to develop time-dynamic experiments so that statistical estimation techniques can most effectively be used to identify high-confidence physics-based models. An implicit limitation to this process lies within the topic of optimal experiment design (OED), which is often posed as an optimal control problem for the concurrent design of aircraft maneuver inputs, instrumentation system parameters, flight conditions, test duration, etc. Here, Fisher information-based optimality criterion are sought to be utilized; however, these metrics can only be accurately computed if the true values of the unknown models and parameters are known prior to conducting the actual experiment. Commonly referred to as the circulatory problem in statistics literature, OED often requires an augmented robust-optimization approach (ROED) to account for inaccuracies due to parametric uncertainty.\u003Cbr \/\u003E \u0026nbsp;\u003Cbr \/\u003E The focus of this research is to consider the design of flight-dynamic experiments from a systems engineering perspective, combining elements of SysID and ROED to concurrently design information-dense robust-optimal flight experiments, in the presence of modeling uncertainties. The proposed methodology is called TEMPUS, which stands for Time-dynamic Experiment design using a Model-based approach to Propagate Uncertainty for System identification, and will be demonstrated using the Generic Hypersonic Vehicle (GHV) model to design information-dense SCRAMjet-powered flight tests. A notable gap that this methodology must overcome, is the automated and accurate computation of variational asymptotic expansions (i.e. higher-order dynamic state-to-parameter sensitivities), which are necessary to compute the information (robust)-optimality metrics. To address this gap, an automatic differentiation tool that is specialized for use in robust-optimal dynamic experiment design is developed.\u003Cbr \/\u003E \u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003EProf. Rafael de la Llave\u003Cbr \/\u003EDr. Charles Domercant\u003Cbr \/\u003EDr. Jon Zumberge\u003Cbr \/\u003EProf. Daniel Schrage\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJohn Dykes will present his dissertation before a committee to include his academic advisor, Dr. Dimitri Mavris\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"TEMPUS: A Methodology For Model-Based Robust-Optimal Design of Time-Dynamic System Identification Experiments Using Variational Asymptotic Expansions"}],"uid":"27836","created_gmt":"2016-08-02 15:29:18","changed_gmt":"2017-04-13 21:15:15","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-08T10:00:00-04:00","event_time_end":"2016-08-08T12:00:00-04:00","event_time_end_last":"2016-08-08T12:00:00-04:00","gmt_time_start":"2016-08-08 14:00:00","gmt_time_end":"2016-08-08 16:00:00","gmt_time_end_last":"2016-08-08 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EKathleen Moore\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"558141":{"#nid":"558141","#data":{"type":"event","title":"Doctoral Defense: John W. Dykes","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to a\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E \u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E\u003Cem\u003Eby\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EJohn W. Dykes\u003Cbr \/\u003EAdvisor: Prof. Dimitri Mavris\u003Cbr \/\u003E9 a.m., Monday, August 8\u003Cbr \/\u003EWeber Building - Collaborative Visualization Environment (CoVE)\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003ETEMPUS: A Methodology For Model-Based Robust-Optimal Design of Time-Dynamic System Identification Experiments Using Variational Asymptotic Expansions\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003Cbr \/\u003E The development of appropriate flight tests has proven to be a critical piece in the design process of many revolutionary next-generation aerospace vehicles.\u0026nbsp; For example, in the case of hypersonic vehicles with air-breathing SCRAMjet engines, sophisticated computational analyses have been developed, requiring extensive validation and calibration. The current state of ground testing facilities has not been able to accommodate these demands, due to the inability to replicate hypersonic flow conditions with sufficient accuracy, and these deficiencies have put more demand and pressure on flight experiments, which have historically proven to produce the highest quality results but at the potential price of extreme complexity and expense.\u0026nbsp; As observed in the case of hypersonic SCRAMjet vehicle flight testing, high expense has led to conservative, risk-averse experiments which often yield little gain in knowledge.\u003C\/p\u003E\u003Cp\u003EThere is an entire discipline devoted to the process of design and information extraction from aerospace-type experiments known as aircraft system identification (SysID), which fuses three strongly interdependent topics: (1) instrumentation and measurement systems, (2) experiment design, and (3) statistical estimation. At its essence, SysID attempts to develop time-dynamic experiments so that statistical estimation techniques can most effectively be used to identify high-confidence physics-based models. An implicit limitation to this process lies within the topic of optimal experiment design (OED), which is often posed as an optimal control problem for the concurrent design of aircraft maneuver inputs, instrumentation system parameters, flight conditions, test duration, etc. Here, Fisher information-based optimality criterion are sought to be utilized; however, these metrics can only be accurately computed if the true values of the unknown models and parameters are known prior to conducting the actual experiment. Commonly referred to as the circulatory problem in statistics literature, OED often requires an augmented robust-optimization approach (ROED) to account for inaccuracies due to parametric uncertainty.\u003Cbr \/\u003E \u0026nbsp;\u003Cbr \/\u003E The focus of this research is to consider the design of flight-dynamic experiments from a systems engineering perspective, combining elements of SysID and ROED to concurrently design information-dense robust-optimal flight experiments, in the presence of modeling uncertainties. The proposed methodology is called TEMPUS, which stands for Time-dynamic Experiment design using a Model-based approach to Propagate Uncertainty for System identification, and will be demonstrated using the Generic Hypersonic Vehicle (GHV) model to design information-dense SCRAMjet-powered flight tests. A notable gap that this methodology must overcome, is the automated and accurate computation of variational asymptotic expansions (i.e. higher-order dynamic state-to-parameter sensitivities), which are necessary to compute the information (robust)-optimality metrics. To address this gap, an automatic differentiation tool that is specialized for use in robust-optimal dynamic experiment design is developed.\u003Cbr \/\u003E \u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003EProf. Rafael de la Llave\u003Cbr \/\u003EDr. Charles Domercant\u003Cbr \/\u003EDr. Jon Zumberge\u003Cbr \/\u003EProf. Daniel Schrage\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJohn Dykes will present his dissertation before a committee to include his academic advisor, Dr. Dimitri Mavris\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"TEMPUS: A Methodology For Model-Based Robust-Optimal Design of Time-Dynamic System Identification Experiments Using Variational Asymptotic Expansions"}],"uid":"27836","created_gmt":"2016-08-02 15:29:59","changed_gmt":"2017-04-13 21:15:15","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-08T14:00:00-04:00","event_time_end":"2016-08-08T16:00:00-04:00","event_time_end_last":"2016-08-08T16:00:00-04:00","gmt_time_start":"2016-08-08 18:00:00","gmt_time_end":"2016-08-08 20:00:00","gmt_time_end_last":"2016-08-08 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EKathleen Moore\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"559421":{"#nid":"559421","#data":{"type":"event","title":"The Aerospace Engineering Career Fair","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cem\u003E\u003Cstrong\u003EAll AE Students are invited to the\u003C\/strong\u003E\u003C\/em\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EAerospace Engineering Career Fair\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EWednesday, September 14\u003Cbr \/\u003E 8 a.m. - noon\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003Eat the \u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EGeorgia Tech Alumni House\u003Cbr \/\u003E 90 North Avenue\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EInternships!\u0026nbsp; Co-ops! Full-time careers!\u003Cem\u003E NETWORKING!!!\u003C\/em\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003EBring your resume and your A-game:\u0026nbsp;this year\u0027s School of Aerospace Engineering Career Fair will feature representatives from virtually every major aerospace employer, including:\u0026nbsp;\u003C\/p\u003E\u003Cul\u003E\u003Cli\u003E\u003Cstrong\u003EGeneral Electric\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003EUnited Technologies\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003ENordam\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003EJet Propulsion Lab\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003EHoneywell\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003EDelta\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003EGulfstream\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003Cli\u003E\u003Cstrong\u003ESikorsky\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/li\u003E\u003C\/ul\u003E\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EDon\u0027t Miss These Special Opportunities:\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E Check out the AE Events Calendar for separate Info Sessions with the following employers that same week:\u003C\/p\u003E\u003Cul\u003E\u003Cli\u003EHoneywell - Sept. 11\u003Cbr \/\u003E \u003C\/li\u003E\u003Cli\u003EUTC - Sept. 12\u003Cbr \/\u003E \u003C\/li\u003E\u003Cli\u003EJPL -\u0026nbsp;Sept. 14\u003C\/li\u003E\u003C\/ul\u003E\u003Cp\u003E\u003Cstrong\u003EThat\u0027s not all:\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E Representatives from Safran and Boeing will be available at the \u003Ca href=\u0022http:\/\/www.careerdiscovery.gatech.edu\/careerfair\/\u0022\u003EGeorgia Tech Career Fair\u003C\/a\u003E, to be held Sept. 12-13, 9:30 a.m. - 4 p.m. in the Campus Recreation Center\u003C\/strong\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe School of Aerospace invites its students to meet with major aerospace engineering employers. Opportunities to interview, network, and apply for internships, co-ops, and jobs. Bring your resume!\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Aerospace Engineering students invited to network, inquire and interview major employers"}],"uid":"27836","created_gmt":"2016-08-04 14:04:37","changed_gmt":"2017-04-13 21:15:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-14T09:00:00-04:00","event_time_end":"2016-09-14T13:00:00-04:00","event_time_end_last":"2016-09-14T13:00:00-04:00","gmt_time_start":"2016-09-14 13:00:00","gmt_time_end":"2016-09-14 17:00:00","gmt_time_end_last":"2016-09-14 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168712","name":"AE Careers"},{"id":"168713","name":"aerospace employers"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"559441":{"#nid":"559441","#data":{"type":"event","title":"Career Info Session: Honeywell","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EAerospace Engineering Students! \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003EYou are invited to a\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003ECareer Information Night\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E\u003Cem\u003Ewith representatives from \u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EHoneywell\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003ESunday, September 11\u003Cbr \/\u003E6-8 p.m. \u003Cbr \/\u003Ein the Guggenheim Building, Room 442\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rteleft\u0022\u003E\u003Cstrong\u003EFind out more about the career, co-op, and internship opportunities at Honeywell. 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Open to all students enrolled in the School of Aerospace Engineering\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EFind out more about the internship, co-ops, and career positions that are looking for aerospace engineers just like you.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"AE students invited to meet with reps from UTC"}],"uid":"27836","created_gmt":"2016-08-04 14:37:45","changed_gmt":"2017-04-13 21:15:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-12T17:00:00-04:00","event_time_end":"2016-09-12T19:00:00-04:00","event_time_end_last":"2016-09-12T19:00:00-04:00","gmt_time_start":"2016-09-12 21:00:00","gmt_time_end":"2016-09-12 23:00:00","gmt_time_end_last":"2016-09-12 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"},{"id":"1577","name":"career"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"559461":{"#nid":"559461","#data":{"type":"event","title":"Career Info Session: Jet Propulsion Lab","body":[{"value":"\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EAerospace Engineering Students! \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cem\u003EYou are invited to a \u003C\/em\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003ECareer Information \u0026nbsp;Session\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cem\u003Ewith representatives from\u003C\/em\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EThe Jet Propulsion Laboratory (JPL)\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EWednesday, September 14\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003E5-7 p.m. \u003Cbr \/\u003E Guggenheim Building- Room 442\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp class=\u0022rtecenter\u0022\u003E\u003Cstrong\u003EREFRESHMENTS PROVIDED\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EFind out more about the career, co-op, and internship opportunities at JPL from an AE alumnus, Ian Clark. Open to all students enrolled in the School of Aerospace Engineering.\u003C\/p\u003E\u003Cp\u003ESubmit your resume ahead of time:  \u003Cstrong\u003E\u003Ca href=\u0022http:\/\/www.jpl.nasa.gov\/opportunities\/\u0022 target=\u0022_blank\u0022\u003Ehttp:\/\/www.jpl.nasa.gov\/opportunities\/\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAE alumnus Ian Clark will be on hand to discuss jobs, internships and co-ops with undergrads, grads, and PhDs. \u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"AE students invited to discuss career possibilities with reps from the JPL"}],"uid":"27836","created_gmt":"2016-08-04 14:47:15","changed_gmt":"2017-04-13 21:15:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-14T18:00:00-04:00","event_time_end":"2016-09-14T20:00:00-04:00","event_time_end_last":"2016-09-14T20:00:00-04:00","gmt_time_start":"2016-09-14 22:00:00","gmt_time_end":"2016-09-15 00:00:00","gmt_time_end_last":"2016-09-15 00:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"8563","name":"careers"},{"id":"6316","name":"JPL"},{"id":"1144","name":"networking"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003ESend your resumes ahead of time: \u003Ca href=\u0022\/\/www.jpl.nasa.gov\/opportunities\/\u0022\u003E http:\/\/www.jpl.nasa.gov\/opportunities\/\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"565801":{"#nid":"565801","#data":{"type":"event","title":"Open House: International Study Opportunities","body":[{"value":"\u003Cp\u003EStudents, advisors, and staff are invited to this session that will acquaint you with the offerings of the OIE. Free food, great information --\u003Cem\u003E for now, or for your future plans!\u003C\/em\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cem\u003EPlease join the OIE advisors for information about study abroad opportunities (Exchanges and Faculty-Led Study Abroad), Global Internships, the International Plan, scholarships, and more. This is a great time for students and advisors to stop by to ask questions about all of these programs in one place and get some\u0026nbsp;free Chick-Fil-A chicken nuggets.\u003C\/em\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Talk to reps from the Office of International Education about how you can incorporate international study to your degree"}],"uid":"27836","created_gmt":"2016-08-21 12:46:36","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-23T12:00:00-04:00","event_time_end":"2016-08-23T14:00:00-04:00","event_time_end_last":"2016-08-23T14:00:00-04:00","gmt_time_start":"2016-08-23 16:00:00","gmt_time_end":"2016-08-23 18:00:00","gmt_time_end_last":"2016-08-23 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"109621","name":"Exchange Programs"},{"id":"7825","name":"international study"},{"id":"1589","name":"OIE"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"565811":{"#nid":"565811","#data":{"type":"event","title":"Open House: RANGE \u0026 USIP Space Missions","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003ELooking for a great research opportunity that will connect you with an actual satellite launch?\u003C\/strong\u003E\u003C\/h4\u003E\u003Cp\u003E\u003Cstrong\u003ECome to this Open House\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Ch3\u003E\u003Cstrong\u003ETuesday, August 23, \u0026nbsp; 5 - 7 p.m.\u003Cbr \/\u003EGuggenheim Building Room 442\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/h3\u003E\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAE Prof. Brian Gunter is looking for grads and undergrads from all relevant majors to join him on one of two working satellite missions: \u003C\/em\u003EUSIP and RANGE\u003Cem\u003E. Requires\u003C\/em\u003E\u003Cem\u003E 8 hours\/week, or 2 credit-hours of work. Open to US citizens or perm. residents only. Bring your resume or email it ahead of time to \u003Ca href=\u0022mailto:brian.gunter@aerospace.gatech.edu\u0022\u003E\u003Cstrong\u003Ebrian.gunter@aerospace.gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cem\u003EAE Prof. Brian Gunter is looking for grads and undergrads from all relevant majors to join him on one of two working satellite missions: \u003C\/em\u003EUSIP and RANGE\u003Cem\u003E. \u003C\/em\u003E\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"StudGrads and undergrads from AE, ME, ECE, \u0026 CS are invited to this open house for an upcoming launch"}],"uid":"27836","created_gmt":"2016-08-21 13:01:53","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-08-23T18:00:00-04:00","event_time_end":"2016-08-23T20:00:00-04:00","event_time_end_last":"2016-08-23T20:00:00-04:00","gmt_time_start":"2016-08-23 22:00:00","gmt_time_end":"2016-08-24 00:00:00","gmt_time_end_last":"2016-08-24 00:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168739","name":"RANGE"},{"id":"168740","name":"research opportunity"},{"id":"168741","name":"satellite research"},{"id":"168742","name":"USIP"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003ESend your resume to Dr. Brian Gunter: \u003Cstrong\u003E\u003Ca href=\u0022brian.gunter@aerospace.gatech.edu\u0022\u003Ebrian.gunter@aerospace.gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"565821":{"#nid":"565821","#data":{"type":"event","title":"Open House: The International Plan \u0026 the GT Exchange Program","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EYou are invited to an\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EOpen House for the\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Ch5\u003EGeorgia Tech International Plan and the Internationial Exchange programs\u003C\/h5\u003E\u003Cp\u003E\u003Cstrong\u003EThursday, August 25, 11-1 p.m.\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EStudent Center Peachtree Room\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003ECome talk to the IP and Exchange Advisors about planning your time abroad at the IP and Exchange Open Houses.\u0026nbsp;The International Plan (IP) is Georgia Tech\u0027s globally-focused degree designation, recognizing students who have committed to making global competence a core part of their GT experience.\u003Cem\u003ECome talk to the IP and Exchange Advisors about planning your time abroad at the IP and Exchange Open Houses.\u0026nbsp;The International Plan (IP) is Georgia Tech\u0027s globally-focused degree designation, recognizing students who have committed to making global competence a core part of their GT experience.\u003C\/em\u003E\u003Cem\u003ECome talk to the IP and Exchange Advisors about planning your time abroad at the IP and Exchange Open Houses.\u0026nbsp;The International Plan (IP) is Georgia Tech\u0027s globally-focused degree designation, recognizing students who have committed to making global competence a core part of their GT experience.\u003C\/em\u003E\u003C\/em\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cem\u003ECome talk to the IP and Exchange Advisors about planning your time abroad at the IP and Exchange Open Houses.\u0026nbsp;The International Plan (IP) is Georgia Tech\u0027s globally-focused degree designation, recognizing students who have committed to making global competence a core part of their GT experience.\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cbr \/\u003E\u003Cem\u003ECome talk to the IP and Exchange Advisors about planning your time abroad at the IP and Exchange Open Houses.\u0026nbsp;The International Plan (IP) is Georgia Tech\u0027s globally-focused degree designation, recognizing students who have committed to making 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Plan"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566011":{"#nid":"566011","#data":{"type":"event","title":"AE Presents: Auburn University\u0027s Brian Thurow","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\u003Ch4\u003E\u003Cstrong\u003EDr. Brian Thurow\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/h4\u003E\u003Cp\u003E\u003Cstrong\u003EDepartment Chair\u003Cbr \/\u003EAuburn University Aerospace Engineering\u003Cbr \/\u003EMontgomery Knight 317 @ 3:30 p.m.\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E\u003Ch3\u003E\u003Cstrong\u003E\u00223D Flow Visualization with Plenoptic Cameras\u0022\u003Cbr \/\u003E \u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/h3\u003E\u003Cp\u003E\u003Cstrong\u003E Abstract\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EDr. Thurow will present his innovative research on 3D optical diagnostics for fluid dynamic and other measurements. \u0026nbsp;\u0026nbsp;\u0026nbsp;The presentation will focus on recent developments he has made using plenoptic cameras for 3D flow visualization. \u0026nbsp;Plenoptic cameras utilize a microlens array placed near an image sensor to measure both the position and angle of light rays that are captured by the camera. \u0026nbsp;\u0026nbsp;By recording light in this manner, one can computationally refocus or change the perspective of an image after it has been acquired. \u0026nbsp;The main strength of this approach is that 3D information about a flow can be recorded with a simple, compact, single-camera system that is relatively robust and easy-to-use. \u0026nbsp;The goal of this presentation is to teach the audience about this technology, demonstrate some areas of recent success, discuss future applications and hopefully inspire the audience to think of new ways that they might be able to use this unique technology.\u003Cbr \/\u003E \u003Cstrong\u003E\u003Cbr \/\u003E \u003Cem\u003EAbout Dr. Thurow\u003C\/em\u003E\u003Cbr \/\u003E\u003C\/strong\u003EDr. Brian Thurow joined Auburn University in 2005 after receiving his B.S. (1999), M.S. (2001) and Ph.D. (2005) from The Ohio State University. \u0026nbsp;He is currently the W. Allen and Martha Reed Associate Professor in the Department of Aerospace Engineering and started serving as the Department Chair in Summer 2016. \u0026nbsp;His research laboratory, the Advanced Flow Diagnostics Laboratory, has focused on the development of high repetition rate (order 1 MHz) optical diagnostics for turbulent flow measurements and, more recently, the development of plenoptic camera technology for 3-D flow visualization. \u0026nbsp;Sponsors include AFOSR, ARO, NSF, NASA, Sandia National Laboratories and others.\u003Cbr \/\u003E \u003Cstrong\u003E\u003Cbr \/\u003E \u003C\/strong\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Auburn\u0027s Aerospace Engineering Department Chair will speak"}],"uid":"27836","created_gmt":"2016-08-22 12:24:10","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-01T16:30:00-04:00","event_time_end":"2016-09-01T17:30:00-04:00","event_time_end_last":"2016-09-01T17:30:00-04:00","gmt_time_start":"2016-09-01 20:30:00","gmt_time_end":"2016-09-01 21:30:00","gmt_time_end_last":"2016-09-01 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566081":{"#nid":"566081","#data":{"type":"event","title":"AE Presents: Michigan University\u0027s Daniel J. Inman","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\u003Ch4\u003EDaniel J. Inman\u003Cbr \/\u003EClarence \u0022Kelly\u0022 Johnson Professor \u0026amp;\u003Cbr \/\u003EChair, Department of Aerospace Engineering\u003C\/h4\u003E\u003Ch4\u003EUniversity of Michigan\u003C\/h4\u003E\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight, Rm 317 \u003Cstrong\u003E@ 3:30pm\u003C\/strong\u003E\u003Cbr \/\u003EDetails TBA\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Ch4\u003E\u0026nbsp;\u003C\/h4\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Clarence \u0022Kelly\u0022 Johnson Professor Daniel Inman will speak"}],"uid":"27836","created_gmt":"2016-08-22 12:38:12","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-22T16:30:00-04:00","event_time_end":"2016-09-22T16:30:00-04:00","event_time_end_last":"2016-09-22T16:30:00-04:00","gmt_time_start":"2016-09-22 20:30:00","gmt_time_end":"2016-09-22 20:30:00","gmt_time_end_last":"2016-09-22 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566091":{"#nid":"566091","#data":{"type":"event","title":"AE Presents:  University of Kansas\u0027 Zhi Jian Wang","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\u003Ch4\u003EDr. Zhi Jian Wang\u003C\/h4\u003E\u003Cp\u003E\u003Cstrong\u003ESpahr Professor and Chair\u003C\/strong\u003E\u003Cstrong\u003E\u003Cbr \/\u003EUniversity of Kansas\u003Cbr \/\u003EAerospace Engineering\u003Cbr \/\u003EMontgomery Knight 317 @ 3:30 p.m.\u003Cbr \/\u003E\u003Cbr \/\u003EDetails TBA\u003Cbr \/\u003E\u003C\/strong\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Spahr Professor and Chair Z. J. Wang will speak"}],"uid":"27836","created_gmt":"2016-08-22 12:54:27","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-09-29T16:30:00-04:00","event_time_end":"2016-09-29T16:30:00-04:00","event_time_end_last":"2016-09-29T16:30:00-04:00","gmt_time_start":"2016-09-29 20:30:00","gmt_time_end":"2016-09-29 20:30:00","gmt_time_end_last":"2016-09-29 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566101":{"#nid":"566101","#data":{"type":"event","title":"AE Presents: UT Austin\u0027s Noel Clemens","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Noel Clemens\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nBob R. Dorsey Professorship in Engineering \u0026amp;\u003Cbr \/\u003E\r\nCockrell Family Chair for Departmental Leadership #2\u003Cbr \/\u003E\r\nUniversity of Texas, Austin\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMontgomery Knight 317 @ 3:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Low-Frequency Unsteadiness of Shock-Wave Turbulent Boundary Layer Interactions\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003EAbstract\u003C\/p\u003E\r\n\r\n\u003Cp\u003EShock wave \/ boundary layer interactions are an important feature of high-speed flow that occur in supersonic aircraft inlets, aircraft control surfaces, missile base flows, nozzles, and rotating machinery. These interactions are often associated with severe boundary layer separation, which is highly unsteady, and which exhibits high fluctuating pressure and heat loads. The unsteady motions are characterized by a wide range of frequencies, including low-frequency motions that are about two orders of magnitude lower than the integral-scale fluctuations in the upstream boundary layer. It is these low-frequency motions that are of most interest because they have been the most difficult to explain and model. Despite significant work over the past few decades, the source of the low-frequency motions remains a topic of intense debate. Some argue that the low-frequency unsteadiness is primarily driven by disturbances in the upstream boundary layer, whereas others argue that it is driven by an intrinsic instability of the separated flow. In this seminar I will discuss the experimental research that we have conducted on this topic over the past 20 years, including our recent work using 50 kHz particle image velocimetry to obtain time-resolved information of the separated flow unsteadiness. I will also propose a point-of-view that seems to reconcile the seemingly contradictory results that have been reported in the literature.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EStreamwise velocity field acquired with PIV in a Mach 2 compression ramp interaction\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. Noel Clemens holds the Bob R. Dorsey Professorship in the Department of Aerospace Engineering and Engineering Mechanics at The University of Texas at Austin and serves as department chair. He received a B.S. in Mechanical Engineering from the University of Massachusetts\/Amherst in 1985, and M.S. and Ph.D. degrees in Mechanical Engineering from Stanford University in 1986 and 1991, respectively. From 1991 to 1993 he was a post-doctoral fellow at the Combustion Research Facility at Sandia National Laboratories in Livermore, CA. Dr.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EClemens began as an Assistant Professor at UT in 1993 and was promoted to full professor in 2005. His areas of research include turbulent mixing, combustion, laser diagnostics, shock wave\/boundary layer interactions, inlet unstart and high-speed flow control. He received the Presidential Faculty Fellow Award in 1995, the College\u0026rsquo;s Faculty Excellence Award in 1997, the award for \u0026ldquo;Outstanding Teaching by an Assistant Professor\u0026rdquo; in 1998, the ASE\/EM Department Teaching Award in 2000, and the Lockheed Martin Award for Excellence in Engineering Teaching in 2011. He is a Fellow of the American Physical Society and he served as Editor-in-Chief of\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u0026nbsp;\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u0026nbsp;\u003C\/h2\u003E\r\n\r\n\u003Ch4\u003E\u0026nbsp;\u003C\/h4\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EClemens will present, \u0026quot;Low-Frequency Unsteadiness of Shock-Wave Turbulent Boundary Layer Interactions\u0026rdquo;\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Noel Clemens, Bob R. Dorsey Professor in Engineering \u0026 Cockrell Family Chair for Departmental Leadership in UT AUstins\u0027 Department of Aerospace Engineering and Engineering Mechanics will speak"}],"uid":"27836","created_gmt":"2016-08-22 13:24:24","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-06T16:30:00-04:00","event_time_end":"2016-10-06T16:30:00-04:00","event_time_end_last":"2016-10-06T16:30:00-04:00","gmt_time_start":"2016-10-06 20:30:00","gmt_time_end":"2016-10-06 20:30:00","gmt_time_end_last":"2016-10-06 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78751","name":"Undergraduate students"},{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566111":{"#nid":"566111","#data":{"type":"event","title":"AE Presents: San Diego State University\u0027s Ping Lu","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. Ping Lu\u003C\/strong\u003E\u003Cbr \/\u003E\r\nChair, Department of Aerospace Engineering\u003Cbr \/\u003E\r\nSan Diego State University\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight 31\u003Cbr \/\u003E\r\nOctober 27 @ 3:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\n\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAn emerging trend in the field of aerospace guidance and control is what we call \u0026ldquo;Computational Guidance and Control\u0026rdquo; (CG\u0026amp;C). In CG\u0026amp;C, traditional guidance and control laws and controllers of fixed structures are replaced by algorithms. CG\u0026amp;C allows much more complex guidance and control tasks to be performed than ever before, offering great potential for significant increase in capability and performance, and reduction in recurring operational costs associated with the G\u0026amp;C systems. With the continued advent in onboard computational capability and customization of algorithms, CG\u0026amp;C is expected to become an increasingly prevalent phenomenon in Guidance and Control, and a key part of the foundational technologies for aerospace system autonomy and autonomous operations. In this presentation, we will offer our perspective on what CG\u0026amp;C entails, what are the characteristics of CG\u0026amp;C in contrast to traditional G\u0026amp;C and other branches of computational sciences and engineering. The requirements of onboard computational efficiency, reliability, and robustness of CG\u0026amp;C demand up-front investment in modeling and analyzing the problem, and novel design of the algorithm. An application in human Mars missions will be provided to demonstrate how this philosophy and CG\u0026amp;C can be practiced in realistic problems to significantly outperform the state-of-the-art technology.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout Dr. Lu\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EPing Lu received his Ph.D. degree in Aerospace Engineering from the University of Michigan. He was on the faculty of Aerospace Engineering at Iowa State University from 1990-2016. Currently he is a Professor and Chair of the Aerospace Engineering Department at San Diego State University. His research interests and expertise are in the area of Guidance and Control, specifically, advanced guidance of space transportation systems, computational control, and autonomous trajectory planning of flying vehicles. Prof. Lu was the recipient of the prestigious Mechanics and Control of Flight Award from the American Institute of Aeronautics and Astronautics (AIAA) in 2008, \u0026ldquo;for contributions in advanced guidance algorithms for entry and ascent flight\u0026rdquo;. Prof. Lu is the Editor-in-Chief of AIAA \u003Cem\u003EJournal Guidance, Control, and Dynamics\u003C\/em\u003E, and a Fellow of AIAA.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"San Diego State\u0027s Aerospace Engineering Department Chair will speak"}],"uid":"27836","created_gmt":"2016-08-22 13:30:42","changed_gmt":"2017-04-13 21:15:02","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-27T16:30:00-04:00","event_time_end":"2016-10-27T16:30:00-04:00","event_time_end_last":"2016-10-27T16:30:00-04:00","gmt_time_start":"2016-10-27 20:30:00","gmt_time_end":"2016-10-27 20:30:00","gmt_time_end_last":"2016-10-27 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"566121":{"#nid":"566121","#data":{"type":"event","title":"AE Gebhardt Seminar:  Brown University\u0027s Huajian Gao","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThe Daniel Guggenheim School of Aerospace Engineering\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EGebhardt Distinguished Lecture Series \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Epresents\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EProfessor Huajian Gao\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EWalter H. Annenberg Professor of Engineering\u003Cbr \/\u003E\r\nBrown University\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EGuggenheim 442 @ 3:30 p.m.\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003E\u003Cem\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003ELow-dimensional nanomaterials, including various types of nanoparticles, nanowires, nanofibers, nanotubes, and atomically thin plates and sheets have emerged as candidates as building blocks for the next generation electronics, microchips, composites, barrier coatings, biosensors, drug delivery, and energy harvesting and conversion systems. There is now an urgent societal need to understand the biological and environmental interactions of low-dimensional nanomaterials which are being produced and released into the environment by thousands of tons per year. This talk aims to discuss mechanics as an enabling tool in this emerging field of study. The discussions will touch on some of the recent experimental, modelling and simulation studies on the mechanisms of cell uptake of low-dimensional nanomaterials and their effects on subcellular vesicles and damage.\u0026nbsp;\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EHuajian Gao received his B.S. degree from Xian Jiaotong University of China in 1982, and his M.S. and Ph.D. degrees in Engineering Science from Harvard University in 1984 and 1988, respectively. He served on the faculty of Stanford University between 1988 and 2002, where he was promoted to Associate Professor with tenure in 1994 and to Full Professor in 2000. He served as a Director at the Max Planck Institute for Metals Research between 2001 and 2006 before joining the Faculty of Brown University in 2006. At present, he is the Walter H. Annenberg Professor of Engineering at Brown.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProfessor Gao\u0026rsquo;s research is focused on the understanding of basic principles that control mechanical properties and behaviors of materials in both engineering and biological systems. He is a Member of the National Academy of Engineering, a Foreign Member of the Chinese Academy of Sciences and the Editor-in-Chief of Journal of the Mechanics and Physics of Solids, the flagship journal of his field. He is also the recipient of numerous academic honors, from a John Simon Guggenheim Fellowship in 1995 to recent honors including Rodney Hill Prize in Solid Mechanics from the International Union of Theoretical and Applied Mechanics in 2012, and Prager Medal from Society of Engineering Science and Nadai Medal from American Society of Mechanical Engineers in 2015.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Walter H. 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font-family: Arial,sans-serif; line-height: 23px;\u0022\u003E\u003Cspan class=\u0022NormalTextRun SCX227453384\u0022 style=\u0022background-color: inherit;\u0022\u003E aerospace engineering from the University \u003C\/span\u003E\u003C\/span\u003E\u003Cspan class=\u0022TextRun SCX227453384\u0022 lang=\u0022EN-US\u0022 style=\u0022font-size: 14pt; font-family: Arial,sans-serif; line-height: 23px;\u0022\u003E\u003Cspan class=\u0022NormalTextRun SCX227453384\u0022 style=\u0022background-color: inherit;\u0022\u003Eof\u003C\/span\u003E\u003C\/span\u003E\u003Cspan class=\u0022TextRun SCX227453384\u0022 lang=\u0022EN-US\u0022 style=\u0022font-size: 14pt; font-family: Arial,sans-serif; line-height: 23px;\u0022\u003E\u003Cspan class=\u0022NormalTextRun SCX227453384\u0022 style=\u0022background-color: inherit;\u0022\u003E Notre Dame.\u003C\/span\u003E\u003C\/span\u003E\u003Cspan class=\u0022EOP SCX227453384\u0022 style=\u0022font-size: 14pt; line-height: 23px; font-family: Arial,sans-serif;\u0022\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EDeputy NASA Administrator Dr. Dava Newman will discuss NASA\u0026#39;s strategic approach in three areas of space exploration: from missions close to Earth involving commercial partners and the International Space Station, advancing to missions in Earth\u0026ndash;Moon orbit, or deep space, using the Space Launch System and Orion spacecraft, and finally moving on to Mars, where explorers will be practically independent from spaceship Earth.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Newman will discuss NASA\u0027s approach to exploration"}],"uid":"27836","created_gmt":"2016-10-06 05:25:38","changed_gmt":"2017-04-13 21:14:25","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-12T13:00:00-04:00","event_time_end":"2016-10-12T14:00:00-04:00","event_time_end_last":"2016-10-12T14:00:00-04:00","gmt_time_start":"2016-10-12 17:00:00","gmt_time_end":"2016-10-12 18:00:00","gmt_time_end_last":"2016-10-12 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"408","name":"NASA"},{"id":"7057","name":"Mars"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"582430":{"#nid":"582430","#data":{"type":"event","title":"Doctoral Defense: Adam D. Siegel","body":[{"value":"\u003Ch3 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cb\u003E\u003Cspan\u003EPh.D. Thesis Defense\u003C\/span\u003E\u003C\/b\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cem\u003E\u003Cstrong\u003E\u003Cspan\u003Eby\u003C\/span\u003E\u003C\/strong\u003E\u003C\/em\u003E\u003Cspan\u003E \u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cstrong\u003E\u003Cspan\u003EAdam D. Siegel\u003C\/span\u003E\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cstrong\u003E\u003Cspan\u003EAdvisor: Prof. Dimitri N. Mavris\u003C\/span\u003E\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch3 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cstrong\u003E\u003Cspan\u003E9 a.m., Friday, October 21\u003C\/span\u003E\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch3 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cstrong\u003E\u003Ci\u003E\u003Cspan\u003EWeber Space Science and Technology Building (SST-II) CoVE Auditorium\u003C\/span\u003E\u003C\/i\u003E\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Ci\u003E\u003Cspan\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1 align=\u0022center\u0022 class=\u0022x_MsoNormal\u0022\u003E\u003Cb\u003E\u003Cspan\u003EA Computational Approach for Preliminary Combustor Design Using a Method \u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\r\n\u003Cb\u003E\u003Cspan\u003Efor Sparse Kinetics\u003C\/span\u003E\u003C\/b\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal\u0022\u003E\u003Ci\u003E\u003Cspan\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/p\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cb\u003E\u003Cspan\u003EABSTRACT:\u003C\/span\u003E\u003C\/b\u003E\u003Cspan\u003EDespite numerous advances in the fields of numerical computing and experimentation, the development of new gas turbine combustors continues to be an extremely costly endeavor. Contemporary aircraft engine component design involves utilizing knowledge from previous architectures (in the form of trends from data, etc.), which the designer uses to develop an improved product. Burners are no different, as gas turbine combustors are conventionally designed using correlations for initial sizing and precursory emissions evaluation. With pollutants becoming an ever increasing concern in air-breathing propulsion systems, the International Civil Aviation Organization strictly regulates the amount of NOx which can be emitted from a given engine. This makes oxides of nitrogen one of the central drivers of modern combustor design, since NOx production considerations cause major restrictions on the properties of the combustor and the conditions under which it can operate.\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EFuture engine cycles are constantly pushed to operate at conditions which tend to increase NOx emissions, and so new combustor concepts and technology must therefore be employed to achieve the lower levels called for by regulations. Utilizing correlations for these future designs however is not possible (since these combustors do not yet exist), and creating these correlations involves very expensive experimentation via computational fluid dynamics (CFD) and rig tests. To counter this cost ramification, many techniques oriented at combustor sizing and NOx prediction have been developed in the past. These approaches still fall short of what is needed, since most are either correlation based (or necessarily involve a calibration step), and all are unable to predict NOx emissions quickly enough and accurately enough for a concept which does not yet exist.\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EThis work aims to establish a new sizing technique which will give the combustor designer a starting point in the development of advanced concepts. By introducing a novel approach to \u003Ci\u003Eindirectly\u003C\/i\u003E couple chemical kinetics and conservation equations, the MoST (Method of Sparse Thermochemistry) algorithm offers a solution to this problem by utilizing sparse kinetics grids in combination with non-reacting CFD solutions. The two codes are tied together and controlled by an overarching algorithm that indirectly couples the flow field and kinetics in such a way that the flow field is still influenced by the chemical process happening within it. This eliminates the need to solve coupled nonlinear PDEs, and instead solves them as a smaller ODE (or algebraic) system. Research is presented which aids to understand the elements which must be captured to turn the flow field into a chemical kinetics network (CKN), exactly how to orient the reactors to best mock the physical processes within the flow field, and how to converge on a flow field solution while taking into account its response to chemical reactions. Grids with varying cell densities and chemical networks with varying numbers of reactors are run using this method and presented as proof of concept. Good agreement is shown between this approach and emissions data from reacting flow CFD.\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cb\u003E\u003Cspan\u003ECommittee Members:\u003C\/span\u003E\u003C\/b\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EProfessor Dimitri N. Mavris (advisor), GT-AE\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EProfessor Jeff Jagoda, GT-AE\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EMr. Russell K. Denney, GT-AE\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EDr. Cristian Nastase, Rolls-Royce\u003C\/span\u003E\u003C\/li\u003E\r\n\t\u003Cli class=\u0022x_MsoNormal rteindent1\u0022\u003E\u003Cspan\u003EMr. William Cummings, Rolls-Royce\u003C\/span\u003E\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp class=\u0022x_MsoNormal\u0022\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cb\u003E\u003Cspan\u003EAdam D. Siegel will\u0026nbsp; present and defend his doctoral research, \u0026quot;A Computational Approach for Preliminary Combustor Design Using a Method for Sparse Kinetics\u0026quot;\u003C\/span\u003E\u003C\/b\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":" Adam D. Siegel will defend his doctoral research before a committee that includes his advisor, Dr. Dimitri Mavris"}],"uid":"27836","created_gmt":"2016-10-12 14:53:08","changed_gmt":"2017-04-13 21:14:21","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-21T10:00:00-04:00","event_time_end":"2016-10-21T13:00:00-04:00","event_time_end_last":"2016-10-21T13:00:00-04:00","gmt_time_start":"2016-10-21 14:00:00","gmt_time_end":"2016-10-21 17:00:00","gmt_time_end_last":"2016-10-21 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"},{"id":"2082","name":"aerospace engineering"},{"id":"100921","name":"ASDL"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"582431":{"#nid":"582431","#data":{"type":"event","title":"Doctoral Derfense: Sayan Ghosh","body":[{"value":"\u003Ch3 align=\u0022center\u0022\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch1 align=\u0022center\u0022\u003E\u003Cstrong\u003ESayan Ghosh\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EAdvisor: Prof. Dimitri N. Mavris\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003E9 a.m. Thursday, October 20 \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp align=\u0022center\u0022\u003E\u003Cem\u003EWeber Space Science and Technology Building \u0026ndash;CoVE Auditorium\u0026nbsp;\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1 align=\u0022center\u0022\u003E\u003Cstrong\u003EA Methodology for Probabilistic Analysis of Distributed Multidisciplinary Architecture (PADMA) for Design\u003Cbr \/\u003E\r\nunder Uncertainty\u003C\/strong\u003E\u0026nbsp;\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT\u003C\/strong\u003E\u003Cbr \/\u003E\r\nUncertainty based Multidisciplinary Optimization (UMDO) relies on propagation of uncertainties across several disciplines. A typical aircraft design process involves collaboration of multiple and diverse teams involving high-fidelity disciplinary tools and experts. Therefore, traditional methods such as All-In-One (AIO), which integrates all the disciplines and treats the entire multidisciplinary analysis process as a black box becomes infeasible for uncertainty propagation and analysis. If all the disciplines cannot be tightly integrated, then it is helpful to use a method that conducts uncertainty propagation in each discipline and combines their results into a system level uncertainty.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDistributed UMDO methods based on Collaborative Optimization (CO), Concurrent Subs-Space Optimization (CSSO), Analytical Target Cascading (ATC), Bi-Level Integrated System Synthesis (BLISS), etc. use the strategy of decomposition and coordination to carry out distributed uncertainty analysis and optimization by preserving disciplinary autonomy. However, there are shortcomings in these methods which leads to inaccurate quantification of uncertainty at system level. One such disadvantage is the inability to handle statistical dependencies among coupling variables. In most cases, the statistical dependencies manifests due the underlying functional relationship between the variables. Most of the existing distributed UMDO methods in literature assume that the coupling variables are independent of each other. Although, under certain conditions this assumption is valid, nonetheless it may lead to inaccurate estimation of uncertainty quantification at system level if the dependencies of coupling variables are significant and if the system level metric is sensitive to the dependencies. Another limitation in the existing distributed UMDO literature is related to interdisciplinary compatibility. One of the common strategies to achieve interdisciplinary compatibility is by moment matching method. Since, only marginal distributions of coupling variables are considered in the moment matching, it works well when coupling variables are statistically independent. However, when coupling variables are dependent, this strategy does not guarantee that interdisciplinary compatibility is satisfied for every instantiation of uncertain variables. Also, most of these methods assume that the uncertain coupling variables have fixed functional form of probability density function, most commonly a Gaussian density function. This assumption breaks down when the local uncertainties in disciplines are non-Gaussian and disciplines are non-linear functions of input variables which lead to non-Gaussian coupling variables.To overcome these limitations, Probabilistic Analysis of Distributed Multidisciplinary Architecture (PADMA) is developed. PADMA is a bi-level distributed uncertainty based multidisciplinary analysis (UMDA) method which allows each discipline to carry out uncertainty propagation independently and concurrently. It is a non-iterative method in which dependence and interdisciplinary compatibility is handled by evaluating the probability of Event of Interdisciplinary Compatibility (EIC). Probability of EIC is evaluated using conditional probability density functions of disciplinary metrics. A quantile copula regression method is developed which is used to model conditional probability density functions. In quantile copula regression, the probability density functions are modeled by regressing multiple level of quantiles of disciplinary metric, allowing a comprehensive representation of overall distribution without any assumption of functional form of probability density function. Also, quantile copula regression models the dependency between disciplinary metric using copula functions when disciplines have multiple outputs. Finally, a distributed UMDO method, Concurrent Optimization using Probabilistic Analysis of Distributed Multidisciplinary Architecture (CO-PADMA), has been developed using PADMA and quantile copula regression. CO-PADMA is a bi-level distributed UMDO method which allows distributed analysis and optimization, while handling the dependencies and interdisciplinary compatibility, to find optimum design and quantify the uncertainty of system metric accurately. The advantages of the methods developed in this thesis have been demonstrated by their application on analytical and physics based problems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProfessor Dimitri N. Mavris, School of Aerospace Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Graeme J. Kennedy, School of Aerospace Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Brani Vidakovic, School of Industrial and Systems Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Daniel P. Schrage, School of Aerospace Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Lakshmi N. Sankar, School of Aerospace Engineering\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003ESayan Ghosh\u003C\/strong\u003E will defend his doctoral research, \u0026quot;\u003Cstrong\u003EA Methodology for Probabilistic Analysis of Distributed Multidisciplinary Architecture (PADMA) for Design under Uncertainty\u003C\/strong\u003E\u0026quot; before a committee to include his advisor, Dr.\u003Cstrong\u003E Dimitri Mavris\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Doctoral Derfense: Sayan Ghosh"}],"uid":"27836","created_gmt":"2016-10-12 15:08:44","changed_gmt":"2017-04-13 21:14:21","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-20T10:00:00-04:00","event_time_end":"2016-10-20T13:00:00-04:00","event_time_end_last":"2016-10-20T13:00:00-04:00","gmt_time_start":"2016-10-20 14:00:00","gmt_time_end":"2016-10-20 17:00:00","gmt_time_end_last":"2016-10-20 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"29951","name":"Dissertation Defense"},{"id":"168695","name":"doctoral defense"},{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"582478":{"#nid":"582478","#data":{"type":"event","title":"Doctoral Defense: Jonathan Walker","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eby\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EJonathan Walker\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch1\u003E\u0026nbsp;\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAdvisor: Professor Mitchell L.R. Walker\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EElectrical Facility Effects on Hall Effect Thruster Operation\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E9 a.m. Wednesday, October 26\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight Building - 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EABSTRACT:\u003Cbr \/\u003E\r\nThe Hall effect thruster (HET) is a type of spacecraft propulsion that is used for satellite orbit raising and station keeping. HET development and lifetime qualification tests are performed in ground-based vacuum facilities. To ensure predictable flight operation of HETs, the ground-based testing environment must be representative of the on-orbit environment, or there must be a clear path to correlate the ground test results to expected on-orbit HET behavior. Much of the previous work related to understanding how to correlate HET ground-testing behavior and HET on-orbit behavior is focused on understanding the impact on HET operation of the elevated neutral gas pressures that HETs experience in ground-based test facilities. Flight data, from satellite missions using HETs, shows that HETs have variations in behavior that cannot be explained through neutral pressure considerations. As experienced during the SMART-1 mission, certain characteristics of the on-orbit HET electrical circuit can be influenced by external electrical factors. For ground-based testing, the vacuum facility walls represent an artificial electrical boundary that is not present during in-flight operation. The electrical impact that the walls and other conductive surfaces in the vacuum chamber have on the behavior of HETs is unknown. The results of the SMART-1 mission demonstrate that there is a gap in the knowledge of HET-vacuum facility interactions. The goal of this work is to better understand how HET thruster operation is influenced by electrical interactions with the conductive walls of the vacuum chamber and other conductive surfaces that are only present within the ground-based testing environment.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETo examine these electrical interactions, this work varies the electrical boundary conditions of key electrical surfaces in the vacuum facility environment and measures how those electrical boundary conditions influence a testbed 3 kW HET. This work identifies two key conductive surface systems in the vacuum testing facility that influence the operation of HETs: the walls of the vacuum facility and the HET body. The walls of vacuum facility influence the plume of the HET by mediating the charge-loss rate to the walls of the vacuum facility. The results of this work suggest that the walls of the vacuum facility artificially bound the plasma properties of the HET plume. This augmentation of the plasma plume indicates that there can be variations in the on-orbit plume characteristics that are not measured during ground testing. For the HET body, the conductive metal structure of the thruster is found to be an active component of the HET electrical circuit. While on-orbit, the HET body is directly connected to the satellite electrical common, and the HET electrical circuit voltage relative to the HET body has been measured to change significantly on-orbit. The results of this work indicate that the thruster body of the HET can play a critical role in the oscillations of the discharge current. Due to the complex plasma conditions present in the near-field of the thruster body, it is difficult to pinpoint the exact physical mechanisms governing the electrical interaction between the thruster body and the HET. The results of this work strongly indicate that the electrical boundary condition of the thruster body is an important consideration for the ground testing of HETs.Collectively, this work provides valuable insight into the field of HET ground testing. Understanding HET\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAE doctoral student\u003Cstrong\u003E Jonathan Walker\u003C\/strong\u003E will defend his doctoral research, \u0026quot;Electrical Facility Effects on Hall Effect Thruster Operation\u0026quot; before a committee that includes his sponsor,\u003Cstrong\u003E Dr. Mitchell Walker II\u003C\/strong\u003E.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Jonathan Walker will defend his doctoral research, \u0022Electrical Facility Effects on Hall Effect Thruster Operation \u0022"}],"uid":"27836","created_gmt":"2016-10-12 20:12:59","changed_gmt":"2017-04-13 21:14:21","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-26T10:00:00-04:00","event_time_end":"2016-10-26T13:00:00-04:00","event_time_end_last":"2016-10-26T13:00:00-04:00","gmt_time_start":"2016-10-26 14:00:00","gmt_time_end":"2016-10-26 17:00:00","gmt_time_end_last":"2016-10-26 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"582695":{"#nid":"582695","#data":{"type":"event","title":"Thesis Proposal: Murali Gopal Muraleedharan ","body":[{"value":"\u003Cp\u003EPh.D. Thesis Proposal by\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EMurali Gopal Muraleedharan\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EAdvisor: Prof. Vigor Yang\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EMULTI-SCALE MODELING OF HEAT TRANSPORT IN COMBUSTION OF ENERGETIC NANOMATERIALS\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E10 am Wednesday November 16\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery-Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EEnergetic nanomaterials are attractive to combustion and propulsion, and energy generation applications. They have high volumetric energy density, and offer precision control of thermal transport properties and chemical reactivity via tailorable nanoscale properties. Examples include metal-based nanoparticles, nanoporous sheets, nano-suspensions, etc. One common approach is to disperse energetic fuel nanoparticles in oxidizer base-fluids to form energetic nano-suspensions. Combustion of nano-suspensions may be diffusion or kinetics limited, depending on their characteristic timescales. Enhanced heat conduction rate has significant impacts on the combustion behaviors of these materials.\u0026nbsp; A detailed understanding of the heat transport mechanisms, therefore, demands special attention.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHeat conduction in nano-suspensions is a widely debated topic. Anomalous thermal conductivity enhancements observed in experiments are often credited to interfacial heat transport and dynamic phenomena. Solid-liquid interfacial heat conduction may be enhanced or repressed by tuning interfacial (Kapitza) conductance. Hydrophilic interfaces offer a strong bonding between particle and base-fluid. Strong bonding between solid and liquid atoms at the interface results in the surface adsorption of fluid molecules, and reduced Kapitza resistance. Interfacial layer (nanolayer) is also significant in enhancing heat conduction. Nanolayer acts as a high density, high phonon mean free path conduit for efficient heat conduction between particle and fluid. Contributions from Brownian motion is also debated. Although it was believed that the random walk of nanoparticles can enhance overall thermal conductivity, Brownian motion effects are usually neglected owing to the high timescales associated with it. Formation of long-chain structures by nanoparticle aggregation can cause heat percolation effects. Several experimental evidences support the role of nanoparticle aggregation towards thermal conductivity enhancement.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, a bottom-up approach is followed to obtain a multiscale model of conductive heat transport in energetic nano-suspension. Molecular dynamics simulations are performed to understand heat transport at the nanoscale. Aluminum, aluminum oxide, and water are the materials used in simulations. In the first stage, equilibrium molecular dynamics (EMD) simulations are performed to investigate the effect of particle volume fraction, particle size, interfacial bonding strength, temperature, and pressure on the thermal conductivity of single and multi-particle nano-suspensions. In the next stage, non-equilibrium molecular dynamics (NEMD) simulations are employed to study interfaces: behavior of interfacial conductance, and the effect of various parameters on it. On the basis of the explored nanoscale physics, a theoretical model for the effective thermal conductivity of energetic nanomaterials is developed. In the final stage, this model is used in a flame propagation problem. Thereafter, the effect of tunable nanoscale properties on the thermal conductivity and macroscale combustion properties is also investigated.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Vigor Yang,AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. G. P. Peterson, ME\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\r\n\u003Cp\u003EDr. Jerry Seitzman, AE\u003C\/p\u003E\r\n\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Asegun Henry, ME\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\r\n\u003Cp\u003EDr. Julian Rimoli, AE\u003C\/p\u003E\r\n\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EMurali Gopal Muraleedharan will present his proposal for doctoral research: \u0026quot;Multi-scale Modeling of Heat Transport in Combustion of Energetic Nanomaterials\u0026quot;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022Multi-scale Modeling of Heat Transport in Combustion of Energetic Nanomaterials\u0022"}],"uid":"27836","created_gmt":"2016-10-17 20:16:18","changed_gmt":"2017-04-13 21:14:17","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-16T10:00:00-05:00","event_time_end":"2016-11-16T12:00:00-05:00","event_time_end_last":"2016-11-16T12:00:00-05:00","gmt_time_start":"2016-11-16 15:00:00","gmt_time_end":"2016-11-16 17:00:00","gmt_time_end_last":"2016-11-16 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1237","name":"College of Engineering"},{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"172487","name":"Doctoral dissertation defense"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"582844":{"#nid":"582844","#data":{"type":"event","title":"Thesis Proposal: Timothy Murphy","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETimothy Murphy\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Dr. Marcus Holzinger\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Integrated Tasking, Processing, and Orbit Determination for Optical Sensors in an SDA Framework\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EFriday, October 28, 2016, \u003C\/strong\u003E \u003Cstrong\u003E12:00 - 2:00 pm\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EMontgomery-Knight Room 317 \u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003ETo create a more efficient space surveillance network, interconnectivity between modeling methods for astrodynamic priors, advanced, high-sensitivity image processing, and sensor tasking should be used to improve the performance and efficiency of all the individual processes. The proposed work provides insight into how to vertically integrate an SSA system. The first contribution describes how to adapt modern visual tracking methods into an SSA detection algorithm. Then, visual tracking methods are integrated with advanced astrodynamics methods to obtain increased performance for both the detection method and the orbit determination process, linking modern detection methods and orbit parameter estimation. The third contribution designs a sensor tasking strategy based on advanced astrodynamics techniques. This work provides a rigorous and general approach, based on optimization techniques, to task a sensor to search for a particular object. Finally, design of a method that integrates detection methods with how sensors are tasked closes the loop. Specifically, this contribution develops a multi-objective optimal approach to choosing sensor tasking parameters.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ETimothy Murphy will present his proposal for doctoral research in \u0026quot;Integrated Tasking, Processing, and Orbit Determination for Optical Sensors in an SDA Framework\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u201cIntegrated Tasking, Processing, and Orbit Determination for Optical Sensors in an SDA Framework\u201d"}],"uid":"33975","created_gmt":"2016-10-20 13:08:09","changed_gmt":"2017-04-13 21:14:15","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-28T13:00:00-04:00","event_time_end":"2016-10-28T15:00:00-04:00","event_time_end_last":"2016-10-28T15:00:00-04:00","gmt_time_start":"2016-10-28 17:00:00","gmt_time_end":"2016-10-28 19:00:00","gmt_time_end_last":"2016-10-28 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583005":{"#nid":"583005","#data":{"type":"event","title":"Ph.D. Thesis Defense: Eric S. Hendricks","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EEric S. Hendricks\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAdvisor: Prof. Dimitri N. Mavris\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EA Multi-Level Multi-Design Point Approach for Gas Turbine Cycle and Turbine Conceptual Design\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ENovember 4, 2016 \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWeber Space Science and Technology Building (SST-II)\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003ECollaborative Visualtization Environment (CoVE)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EIn order to address key challenges facing the aviation industry, NASA\u0026rsquo;s Advanced Air Vehicle Program researches new aircraft technologies and concepts.\u0026nbsp; Developing these new technologies and concepts is becoming increasingly difficult as the subsystems comprising these aircraft are highly coupled, often resulting in critical subsystem requirements and constraints throughout the flight envelope which drive the design.\u0026nbsp; This challenging design environment is particularly relevant in the development of propulsion system technologies for emerging aircraft concepts such as a large civil tiltrotor.\u0026nbsp; This work developed two complementary design methodologies to support the design of turbines and their associated engines for these new vehicle concepts.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe first methodology developed focuses on facilitating the design of turbine components when requirements and constraints have been identified at a number of operating conditions.\u0026nbsp; To facilitate development of these designs, the method incorporates multiple design points into the on-design analysis phase to ensure that designs generated simultaneously satisfy all performance requirements and design constraints.\u0026nbsp; Development of this turbine multi-design point (MDP) method focused on determining the appropriate design parameterization for the turbine as well as formulation of design rules to couple the design points to assure the requirements and constraints are satisfied.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe second design methodology developed in this thesis aims to facilitate the design of the coupled turbine and engine system when requirements and constraints are present at multiple operating conditions for both systems.\u0026nbsp; Development of this method combined elements from the turbine MDP method and a similar cycle MDP using a new integration approach that directly couples the design points across the analysis levels. This multi-level, multi-design point (MLMDP) approach therefore simultaneously generates engine cycle and turbine designs that are consistent with each other while also satisfying all requirements and constraints at each analysis level.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EEvaluation of these two design methods was completed by applying the methods to three selected design problems.\u0026nbsp; These problems included the design of two different power turbines and their associated turboshaft engines for a notional tiltrotor aircraft as well as the low pressure turbine for the E\u003Csup\u003E3\u003C\/sup\u003E engine.\u0026nbsp; Experiments completed with these models validated critical components of the methodologies and assessed differences in the engine and turbine designs relative to those produced by traditional design practices.\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. Mavris, Dr. Jagoda, Dr. Schrage, Dr. Tai, Dr. Welch (NASA Glenn Research Center)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EEric S. Hendricks will present his defense for doctoral research in \u0026quot;A Multi-Level Multi-Design Point Approach for Gas Turbine Cycle and Turbine Conceptual Design\u0026quot;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022A Multi-Level Multi-Design Point Approach for Gas Turbine Cycle and Turbine Conceptual Design\u0022"}],"uid":"33975","created_gmt":"2016-10-24 18:41:20","changed_gmt":"2017-04-13 21:14:13","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-04T10:00:00-04:00","event_time_end":"2016-11-04T13:00:00-04:00","event_time_end_last":"2016-11-04T13:00:00-04:00","gmt_time_start":"2016-11-04 14:00:00","gmt_time_end":"2016-11-04 17:00:00","gmt_time_end_last":"2016-11-04 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583074":{"#nid":"583074","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Suo Yang","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ESuo Yang\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisers: Prof. Wenting Sun and Prof. Vigor Yang \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EEffects of Detailed Finite Rate Chemistry in Turbulent Combustion\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDirect numerical simulation (DNS) and large eddy simulation (LES) are critical to analyze and improve design and development of advanced energy conversion and propulsion systems, for ignition, combustion instability, lean blow-out, and emissions. However, stiff finite-rate chemistry and mixture-averaged transport are computationally intensive, especially in 3D turbulent combustion simulations. For this reason, except for those consuming excessive computational resources and time, most past DNS\/LES studies of turbulent combustion have used either a flamelet model with detailed chemistry (~50 species or more) or a simplified\/reduced finite-rate chemical model with non-stiff reactions (~10 species). Both approaches, however, are of limited accuracy and reduce the overall quality of prediction. Therefore, it is required to accelerate the computation of chemical kinetics and transport properties to enable computationally efficient and accurate simulations employing detailed finite-rate chemical kinetic models.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn addition, the sensitivity of simulation results to different chemical kinetic models is unclear, particularly on the prediction of local extinction and re-ignition events in turbulent combustion environments. Knowledge of local extinction and re-ignition events are vital, as they may lead to increased emissions, combustion instability, or flame blow-out. Therefore, accurate prediction of these events is an important task for high-fidelity simulations, which requires quantitatively capturing the wide range of time and length scales involved and the complex interactions between turbulent mixing, molecular diffusion, and chemical reactions. Most existing chemical models have similar predictions of ignition and extinction in 0D\/1D finite-rate simulations of laminar combustion processes. Is it appropriate to extend this observation to a 3D turbulent combustion environment?\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, a new regime-independent simulation framework for turbulent combustion is developed by incorporating techniques of correlated dynamic adaptive chemistry (CoDAC), correlated transport, and an efficient point-implicit ODE solver to allow computationally efficient DNS\/LES with detailed finite-rate chemistry. In particular, CoDAC generates locally-optimized reduced kinetics for each spatial location and time step, and only the reaction rates of active species are calculated. Using this tool, 2 chemical kinetic models are compared by performing 3D finite-rate kinetics based simulations of a temporally evolving turbulent non-premixed syngas flame. Significant quantitative deviations indicate high sensitivity of local extinction and re-ignition predictions to different chemical kinetic models. This sensitivity is significantly magnified by the effects of 3D and turbulence relative to a 1D laminar simulation, with the deviations in species concentrations, temperature, and reaction rates forming a positive feedback loop. At local extinction, the major differences are the peak values and their volume, which is dominated by the 3D effects; whereas at re-ignition, the differences are mostly observed in spatial distribution of the reacting flow field, which is primarily dominated by the complex turbulence-chemistry interaction. In the next stage, the new framework will be extended to LES in a preconditioning scheme to cover a wide range of Mach numbers for practical applications.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Wenting Sun, ME, Dr. Vigor Yang, AE, Dr. Suresh Menon, AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ESuo Yang will present his proposal for doctoral research in the \u0026ldquo;Effects of Detailed Finite Rate Chemistry in Turbulent Combustion\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u201cEffects of Detailed Finite Rate Chemistry in Turbulent Combustion\u201d"}],"uid":"33975","created_gmt":"2016-10-25 16:13:08","changed_gmt":"2017-04-13 21:14:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-02T14:00:00-05:00","event_time_end":"2016-12-02T16:00:00-05:00","event_time_end_last":"2016-12-02T16:00:00-05:00","gmt_time_start":"2016-12-02 19:00:00","gmt_time_end":"2016-12-02 21:00:00","gmt_time_end_last":"2016-12-02 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583104":{"#nid":"583104","#data":{"type":"event","title":"Ph.D. Thesis Defense: Zu Puayen Tan","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EZu Puayen Tan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Prof. Ben T. Zinn\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EExperimental Study of Spray-Formation Processes in Twin-Fluid Jet-In-Crossflow at Jet-Engine Operating Conditions\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2:00 PM, Wednesday, November 9, 2016\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EJet-in-crossflow (JICF) fuel-injection is widely applied in modern jet-engines to provide rapid fuel-atomization and mixing. However, \u0026ldquo;classical\u0026rdquo; JICF places large amounts of fuel into the low-velocity region near the injector wall, which can cause flashback and fuel-coking on the wall. A nascent fuel-injection technique called Twin-Fluid (TF) JICF is being considered as a way to mitigate Classical-JICF\u0026rsquo;s shortcomings. In TF-JICF, air is co-injected around the fuel jet to modify its atomization and penetration characteristics. Designers expect TF-JICF to enhance the fuel\u0026rsquo;s penetration away from the wall (i.e., reduce near-wall fuel concentrations). However, the performance of TF-JICF is currently not well understood, especially at the high pressures found in jet-engines. This dissertation work addresses the knowledge gap by experimentally investigating a TF-JICF where liquid Jet-A fuel was co-injected with pressurized nitrogen into a crossflow of air. The crossflow and injection conditions were varied over wide ranges that cover those conditions reported in the available TF-JICF literature, as well as those expected for jet-engines. The resulting TF-JICF fuel sprays were imaged by shadowgraphy, and their penetrations, dispersions and atomization processes were analyzed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; For a fixed fuel flow-rate, different levels of air-injection velocities were found to cause different spray characteristics (see figure below). A mild injection of air inhibited the atomization of the initial fuel jet, thus reducing the near-wall fuel concentration and flashback\/wall-coking risks. A very strong injection of air \u0026ldquo;propelled\u0026rdquo; the fuel very far away from the wall while also enhancing atomization. On the other hand, medium levels of air-injection were generally non-beneficial towards fuel-injector design. Four TF-JICF regimes were identified (i.e., Classical-JICF, Air-Assist JICF, Airblast JICF and Airblast Spray-in-Crossflow) based on these characteristics and their formation mechanisms.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EZu Puayen Tan will present his defense for doctoral research in \u0026quot;Experimental Study of Spray-Formation Processes in Twin-Fluid Jet-In-Crossflow at Jet-Engine Operating Conditions\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u201cExperimental Study of Spray-Formation Processes in Twin-Fluid Jet-In-Crossflow at Jet-Engine Operating Conditions\u201d"}],"uid":"33975","created_gmt":"2016-10-25 18:19:34","changed_gmt":"2017-04-13 21:14:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-09T14:00:00-05:00","event_time_end":"2016-11-09T16:00:00-05:00","event_time_end_last":"2016-11-09T16:00:00-05:00","gmt_time_start":"2016-11-09 19:00:00","gmt_time_end":"2016-11-09 21:00:00","gmt_time_end_last":"2016-11-09 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583193":{"#nid":"583193","#data":{"type":"event","title":"SAESAC Presents: 2016 State of the AE School","body":[{"value":"\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to the\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EState of the AE School \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EThursday, Dec. 1 @11 am in Guggenheim 442\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch3\u003E\u0026nbsp;\u003C\/h3\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAE School Chair Dr. Vigor Yang will speak about the AE School\u0026#39;s accomplishments, goals, and plans. \u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch4\u003EBring your questions. Refreshments will be served.\u003C\/h4\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Vigor Yang will speak about the AE School\u0027s accomplishments, goals, and plans"}],"uid":"33975","created_gmt":"2016-10-27 12:48:36","changed_gmt":"2017-04-13 21:14:09","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-01T11:00:00-05:00","event_time_end":"2016-12-01T12:00:00-05:00","event_time_end_last":"2016-12-01T12:00:00-05:00","gmt_time_start":"2016-12-01 16:00:00","gmt_time_end":"2016-12-01 17:00:00","gmt_time_end_last":"2016-12-01 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583487":{"#nid":"583487","#data":{"type":"event","title":"Ph.D. Proposal: Debolina Dasgupta","body":[{"value":"\u003Cp\u003EYou are invited to a PhD proposal\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDebolina Dasgupta\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Prof. Tim Lieuwen\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ETurbulence Effects on Chemical Pathways\u003Cbr \/\u003E\r\nfor Lean Premixed Flames \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003E11am Monday, November 28\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFood Processing Technology Building, Auditorium (Room 103)\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E(Opposite to Ben T. Zinn Combustion Lab, NARA)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETurbulent combustion, particularly premixed combustion has great practical importance due to their extensive industrial usage in gas turbines, internal combustion engines etc. However, the physics governing the inherent multi- scale interactions of turbulence, flow-field and chemistry is not yet well established. A complete understanding of each of these interactions and their coupling is essential for the development of models that can aid simulations of realistic engines (using Large Eddy Simulations (LES) or Reynolds averaged Navier-Stokes equations (RANS).\u003C\/p\u003E\r\n\r\n\u003Cp\u003EParticularly, understanding the flame structure and its stabilization requires an understanding of the turbulence-chemistry interactions. This can manifest itself in many different forms. For example, flame wrinkling gives rise to flame stretch that can modify the local temperature and species concentrations in turn altering the local chemistry. Also, the smaller eddies in a turbulent flow can penetrate into the preheat and reaction zones changing the species\u0026rsquo; gradients within the flame.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, the effect of increasing turbulence on chemical pathways for fuel oxidation is investigated using Direct Numerical Simulations (DNS). Important metrics are identified to effectively quantify these changes using multiple data conditioners such as fuel consumption, curvature etc. To explore fuel effects, this analysis is performed for characteristically different fuels such as H\u003Csub\u003E2\u003C\/sub\u003E, CH\u003Csub\u003E4\u003C\/sub\u003E and heavier fuels such as n-C\u003Csub\u003E12\u003C\/sub\u003EH\u003Csub\u003E26\u003C\/sub\u003E (a good surrogate for kerosene based fuels). The results are also compared and contrasted with simple 0D\/1D laminar flame models. A simple analytical model using thermodynamics and reaction kinetics is developed to emphasize the universality of the results obtained. Finally, reaction pathways (and their sensitivity to increasing turbulence) for different combustion modes (such as auto-ignition, extinction, assisted ignition) are also explored.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EDr. Tim Lieuwen, AE\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Carsten Sievers, ChBE\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Wenting Sun, AE\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Ms.Dasgupta will present \u0022Turbulence Effects on Chemical Pathways  for Lean Premixed Flames "}],"uid":"27836","created_gmt":"2016-11-03 16:06:07","changed_gmt":"2017-04-13 21:14:04","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-28T11:00:00-05:00","event_time_end":"2016-11-28T14:00:00-05:00","event_time_end_last":"2016-11-28T14:00:00-05:00","gmt_time_start":"2016-11-28 16:00:00","gmt_time_end":"2016-11-28 19:00:00","gmt_time_end_last":"2016-11-28 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"},{"id":"913","name":"PhD"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583500":{"#nid":"583500","#data":{"type":"event","title":"Career Info Session: Skunk Works\u0027 Dan Baruzzini","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDan Baruzzini\u003C\/strong\u003E\u003Cbr \/\u003E\r\nAdvance Propulsion Manager\u003Cbr \/\u003E\r\nLockheed Martin\u0026#39;s Skunk Works\u003C\/h2\u003E\r\n\r\n\u003Cp\u003Egive a talk entitled\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Navigational Interviewing with the Aerospace Industry: Subtlety, Perception, \u0026amp; Misinterpretations\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EKlaus Building Classroom 1456\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E11 a.m. to noon\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EPizza provided\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe Georgia Tech Chapter of the American Institute of Aeronautics and Astronautics will present this career information session to all interested AE students\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Dan Baruzzini will give a talk \u0022Navigational Interviewing within the Aerospace Industry\u0022"}],"uid":"27836","created_gmt":"2016-11-03 16:57:43","changed_gmt":"2017-04-13 21:14:04","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-18T11:00:00-05:00","event_time_end":"2016-11-18T12:00:00-05:00","event_time_end_last":"2016-11-18T12:00:00-05:00","gmt_time_start":"2016-11-18 16:00:00","gmt_time_end":"2016-11-18 17:00:00","gmt_time_end_last":"2016-11-18 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"172653","name":"Career Info"},{"id":"1325","name":"aerospace"},{"id":"172654","name":"Skunk Works"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"26411","name":"Training\/Workshop"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583537":{"#nid":"583537","#data":{"type":"event","title":"Doctoral Thesis Proposal: Christopher Lioi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EChristopher Lioi\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EThursday, November 30, 10 a.m.\u0026nbsp; Montgomery Knight 317\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETheoretical Acoustic Stability Analysis of Oxidizer-Rich Staged Combustion Engine Thrust Chambers\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe development and operation of liquid propellant rocket engines (LREs) remains hampered by the occurrence of combustion instabilities.\u0026nbsp; These large amplitude, coherent pressure disturbances result from complex feedback between unsteady combustion and the acoustic and hydrodynamic oscillations within the chamber.\u0026nbsp; Only a small portion of the energy liberated from chemical reactions must be transferred to the oscillatory motions for the resulting pressure amplitudes to become large enough to damage or destroy engine hardware.\u0026nbsp; For very energy dense systems such as LREs, the concern is especially high as the risk of catastrophic failure is increased.\u0026nbsp; Combustion instabilities have historically been addressed during the design stage of an engine in a rather ad-hoc manner.\u0026nbsp; Famously, the F-1 engine developed as part of the Apollo program underwent over 2000 full-scale tests before an acceptable configuration was achieved.\u0026nbsp; Such an empirical approach is expensive and time consuming, and better methods are required for accurately and consistently determining a priori the stability of a candidate engine.\u0026nbsp; Many theoretical investigations have materialized over the intervening decades but additional work is still needed, especially for systems with complex geometry and flowfields.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis thesis aims to broaden the existing capacity for combustion stability assessment by exploring the acoustics of a configuration representative of an oxidizer-rich staged combustion (ORSC) engine, and particularly one employing a gas-centered swirled coaxial (GCSC) injector design.\u0026nbsp; Whereas other configurations may be idealized acoustically as consisting only of the main thrust chamber terminated upstream by some impedance condition, this is insufficient for the engine described here.\u0026nbsp; A continuous gas phase region may be identified as connecting the main chamber to an oxidizer dome via the GCSC manifold, such that acoustic coupling with these components must be accounted for in a more comprehensive manner.\u0026nbsp; To this end, an eigenmode matching technique is employed to connect the three distinct subdomains and derive wave characteristics for the composite system.\u0026nbsp; Numerical results for the complex eigenfrequencies are compared with finite element solutions, and eigenvalue asymptotics will be employed to study the parametric dependence of the system stability on model inputs, particularly combustion response parameters.\u0026nbsp; As part of the investigation, a simplified combustion response model appropriate to the geometry and turbulent flow conditions will be developed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\u0026bull;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Vigor Yang (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u0026bull;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Lakshmi Sankar (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u0026bull;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Krish Ahuja (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u0026bull;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Timothy Lieuwen (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u0026bull;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Dr. Kenneth Cunefare (ME)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Christopher Lioi will present his proposal, \u0022Theoretical Acoustic Stability Analysis of Oxidizer-Rich Staged Combustion Engine Thrust Chambers\u0022"}],"uid":"27836","created_gmt":"2016-11-04 15:50:24","changed_gmt":"2017-04-13 21:14:04","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-30T10:00:00-05:00","event_time_end":"2016-11-30T12:00:00-05:00","event_time_end_last":"2016-11-30T12:00:00-05:00","gmt_time_start":"2016-11-30 15:00:00","gmt_time_end":"2016-11-30 17:00:00","gmt_time_end_last":"2016-11-30 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583538":{"#nid":"583538","#data":{"type":"event","title":"DCL Presents: Prof. Efstathios Bakolas","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EProf. Efstathios Bakolas\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003Egive a lecture\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cem\u003EControl and Partitioning Algorithms for Microscopic and Macroscopic Modeling Abstractions of Multi-Agent Networks \u003C\/em\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Eon Friday, November 11 at 11 a.m.\u003C\/em\u003E\u003Cbr \/\u003E\r\nMontgomery Knight 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout this talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the first part of this talk I will present distributed algorithms for partitioning and locational optimization problems involving networks of agents with planar rigid body dynamics in the presence of communication constraints. First, I will discuss a solution technique for the computation of a Voronoi-like partition of a three-dimensional non-flat manifold embedded in a six-dimensional state space based on a proximity metric that is a non-quadratic function. The proposed approach is based on a special embedding technique with which the original partitioning problem is associated with a one-parameter family of partitioning problems, whose domains are two-dimensional flat sub-manifolds of the original three-dimensional manifold and their proximity metrics are (parametric) quadratic functions. In contrast with the original problem, the parametric problems have a special structure that allows one to solve them by means of exact and finite steps algorithms. Subsequently, I will utilize the proposed class of Voronoi-like partitions to develop distributed locational optimization algorithms, which are based on a \u0026ldquo;divide and conquer\u0026rsquo;\u0026rsquo; philosophy.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the second part of the talk, I will present control algorithms that are intended to steer the macroscopic state of a multi-agent network, when the latter is described in terms of a probability distribution, to a goal state\/distribution. I will focus on finite-horizon distribution steering problems for discrete-time stochastic linear systems with either complete or incomplete state information using a stochastic optimal control framework. I will show that in the special case in which the marginal distributions are multi-variate Gaussian distributions, the stochastic optimal control problem can be essentially reduced to a finite-dimensional, deterministic nonlinear program, whose only obstruction from being a convex program is the non-convexity of a terminal equality constraint imposed on the state covariance. Subsequently, I will show that the nonlinear program can be associated, via a simple convex relaxation technique, with a convex program which can be addressed by means of robust and efficient algorithms.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe Decision and Control Lab and Prof. \u003Cstrong\u003EPanagiotis Tsiotras\u003C\/strong\u003E are proud to present Prof. \u003Cstrong\u003EEfstathios Bakolas\u0026nbsp;\u003C\/strong\u003E who will give a talk entitled \u0026quot;Control and Partitioning Algorithms for Microscopic and Macroscopic Modeling Abstractions of Multi-Agent Networks\u0026quot;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Efstathios Bakolas will give a talk entitled \u0022Control and Partitioning Algorithms for Microscopic and Macroscopic Modeling Abstractions of Multi-Agent Networks"}],"uid":"27836","created_gmt":"2016-11-04 16:34:43","changed_gmt":"2017-04-13 21:14:04","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-11T11:00:00-05:00","event_time_end":"2016-11-11T12:00:00-05:00","event_time_end_last":"2016-11-11T12:00:00-05:00","gmt_time_start":"2016-11-11 16:00:00","gmt_time_end":"2016-11-11 17:00:00","gmt_time_end_last":"2016-11-11 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168731","name":"Control Theory"},{"id":"172668","name":"Algorithms for Microscopic and Macroscopic Modeling"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583590":{"#nid":"583590","#data":{"type":"event","title":"AE Presents: Self-similarity of Steady and Unsteady Turbulent Round Jets ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ESelf-similarity of Steady and Unsteady Turbulent Round Jets\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003E\u0026nbsp;a talk by\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Dong-Hyuk Shin\u003Cbr \/\u003E\r\nUniversity of Edinbrugh, United Kingdom\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, November 15\u0026nbsp;\u0026nbsp; 2-3 p.m.\u003Cbr \/\u003E\r\nFood Processing Technology Building Conference Room 103, NARA complex\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout this talk\u003C\/strong\u003E\u003Cbr \/\u003E\r\nAlthough jet flow is one of the simplest configuration in fluid mechanics, its dynamic behaviour is still not well understood. The mixing characteristics of ambient fluid and jet fluid is important in many engineering applications such as combustion engines, jet in cross flow, pollutant spreading over air, and ocean contamination. In compression ignition (e.g. diesel) engines, transient injections of fuel jets enhance mixing of fuel and air to control the ignition event which is critical for efficient heat conversion and pollutant reduction. In understanding the jet flow field, the concept of self-similarity is widely used for understanding of turbulent flow such as jets, wakes, and mixing layers. If the self-similarity holds, all the scaled fluid properties are represented by scaled coordinates. For example in a steady-state turbulent round jet, all the velocity statistics scaled by its centerline axial velocity are the functions of the scaled radius, typically radius over axial location. The self-similarity assumption is made when modelling the unsteady jet, while this assumption had not been fully justified. Direct numerical simulation of stopping jet was performed with multiple realizations, and the self-similarity assumption is tested. Furthermore, we developed a rigorous analysis of self-similar unsteady jet whose model is validated with DNS data set. Lastly, the self-similarity of new passive scalar, fluid age, is investigated with steady state jet. The characterization of fluid age can lead to the development of combustion model with application to internal combustion engines.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout Dr. Shin\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EPostdoc (2014) University of Southampton, United Kingdom\u003C\/li\u003E\r\n\t\u003Cli\u003EPostdoc (2013) Centre Europ\u0026eacute;en de Recherche et de Formation Avanc\u0026eacute;e en Calcul Scientifique (CERFACS), France\u003C\/li\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch3\u003E\u003Cstrong\u003EPh. D. (2012) Aerospace Engineering at the Georgia Institute of Technology, USA\u003C\/strong\u003E\u003C\/h3\u003E\r\n\t\u003C\/li\u003E\r\n\t\u003Cli\u003EB. S. (2006) Aerospace Engineering at KAIST with summa cum laude and minor in Mathematics, Korea\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"University of Edinburgh\u0027s Donghyuk Shin will give this talk"}],"uid":"27836","created_gmt":"2016-11-07 18:15:54","changed_gmt":"2017-04-13 21:14:04","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-15T14:00:00-05:00","event_time_end":"2016-11-15T15:00:00-05:00","event_time_end_last":"2016-11-15T15:00:00-05:00","gmt_time_start":"2016-11-15 19:00:00","gmt_time_end":"2016-11-15 20:00:00","gmt_time_end_last":"2016-11-15 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583673":{"#nid":"583673","#data":{"type":"event","title":"Ph.D. Thesis Proposal by Matthew Gross","body":[{"value":"\u003Ch1\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by Matthew Gross\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. Mark Costello\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EMeta-Optimization with Application to Aerospace System Identification\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOptimization is a powerful tool for solving practical engineering problems, including identification for aerospace systems. Due to the complexity of many optimization problems, numerical methods are often employed to obtain solutions. A diverse collection of numerical optimization methods have been developed, each suited for different types of problems. Local search methods are highly efficient on convex problems, but require good initial guesses to find the global optimum. Global methods are able to search the entire parameter space to determine the global optimum, often at the cost of increased computation time. Given the fact that no one optimization algorithm performs well on every problem, the selection of the proper algorithm for a given problem is a critical decision by an engineer.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ETo overcome the algorithm selection problem, this work proposes a new method for automatically selecting and deploying optimizers, dubbed meta-optimization. The goal of meta-optimization is to intelligently deploy a diverse set of optimization algorithms, leveraging the strengths of each algorithm and minimizing their weaknesses in order to reliably and accurately solve challenging optimization problems with minimal user intervention. The first component of the meta-optimizer is the bank of optimization algorithms which includes numerous local and global search methods. Algorithm selection is performed in an online manner, choosing the most effective algorithms at the current stage of the solution process. The meta-optimizer must also ensure smooth transition between different algorithms and prevent premature convergence in local optima. Finally, the meta-optimizer tunes optimization algorithms parameters which degrade performance of the algorithm.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe meta-optimizer is first tested on a set of benchmark functions and then used to solve two aerospace system identification problems. The first problem considered is the estimation of parameters for a new smart projectile system. Both simulated and experimental spark range data is used to estimate the body and control mechanism parameters. The second application is the calibration of inertial measurement units (IMUs) for onboard sensing of precision guided air drop systems using simulated and experimental calibration table data.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E* Dr. Mark Costello, AE (Advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003E* Dr. Brian German, AE\u003C\/li\u003E\r\n\t\u003Cli\u003E* Dr. Eric Johnson, AE\u003C\/li\u003E\r\n\t\u003Cli\u003E* Dr. Graeme Kennedy, AE\u003C\/li\u003E\r\n\t\u003Cli\u003E* Dr. Aldo Ferri, ME\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Ph.D. Thesis Proposal by Matthew Gross"}],"uid":"33975","created_gmt":"2016-11-08 19:14:57","changed_gmt":"2017-04-13 21:14:02","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-15T15:00:00-05:00","event_time_end":"2016-11-15T16:00:00-05:00","event_time_end_last":"2016-11-15T16:00:00-05:00","gmt_time_start":"2016-11-15 20:00:00","gmt_time_end":"2016-11-15 21:00:00","gmt_time_end_last":"2016-11-15 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583718":{"#nid":"583718","#data":{"type":"event","title":"Ph.D. Thesis Defense: Nana Obayashi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EMaster\u0026rsquo;s Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ENana Obayashi\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Prof. Lakshmi Sankar\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EAssessment of Icing Characteristics for Single and Coaxial Rotors\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, November 14 @ 9 a.m., Montgomery Knight 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIcing on blade surfaces adversely affects the aerodynamic performance and safety of helicopters through loss of lift, loss of power, increase in drag, decrease in stall angle and dangerous ice shedding events. Equipping rotor blades against the effects of icing increases the helicopter cost and puts higher demand on the power plant. In the field of CFD, efforts have focused on modeling the effects of icing, including the resulting rotor performance degradation. Single rotor helicopters have been the primary focus of existing models for ice accretion, leaving an opportunity to expand modeling efforts to other types of helicopters, such as coaxial rotors. Although the coaxial rotor has a number of advantages attributed to its symmetric aerodynamic environment in any flight direction, additional work is needed using physics-based models, in order to analyze the complex flow interactions between the upper and lower blades.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAn in-house ice accretion model was improved upon prior work by implementing a 3-D Eulerian approach integrated into the CFD flow solver, GT-Hybrid, in order to solve for water droplet collection efficiency on the surface of the rotor blade. This model implements an extended Messinger model with the Stefan condition at the ice\/water interface in order to predict ice accretion based on droplet collection and establishment of a thermodynamic balance for phase shift. These improvements have allowed this model to reduce the limitations and empiricism inherent in existing models. The model has been validated based on a limited number of cases with promising predictive power compared to the industry standard ice accretion model by NASA, called LEWICE.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe present work contributes to the efforts behind the in-house ice accretion model in two ways. First, ice shape prediction using the in-house model is validated against existing experimental ice accretion data for a single rotor configuration in three different flight conditions. An analysis of the simulated and experimental results presented shows promising evidence of the model\u0026rsquo;s predictive power, especially at the inboard blade locations where the ice is predominantly rime. Second, the in-house model is adapted for application to a coaxial rotor configuration. In order to validate the flow solution, performance analysis is completed for a coaxial rotor in hover using GT-Hybrid and Star-CCM+ in the absence of ice accretion. Then, ice accretion is simulated for the same rotor for three collective pitch angles and the ice shapes are presented. Finally, the performance degradation of the coaxial rotor due to ice is estimated.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Lakshmi N. Sankar, School of Aerospace Engineering (Advisor)\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Jechiel I. Jagoda, School of Aerospace Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Daniel P. Schrage, School of Aerospace Engineering\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ENana Obayashi will present her defense for doctoral research in the \u0026ldquo;Assessment of Icing Characteristics for Single and Coaxial Rotors\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u201cAssessment of Icing Characteristics for Single and Coaxial Rotors\u201d"}],"uid":"33975","created_gmt":"2016-11-09 20:11:21","changed_gmt":"2017-04-13 21:14:02","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-14T09:00:00-05:00","event_time_end":"2016-11-14T11:00:00-05:00","event_time_end_last":"2016-11-14T11:00:00-05:00","gmt_time_start":"2016-11-14 14:00:00","gmt_time_end":"2016-11-14 16:00:00","gmt_time_end_last":"2016-11-14 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583799":{"#nid":"583799","#data":{"type":"event","title":"AE Gebhardt Lecture Series Presents:  Boeing\u0027s Kevin Bowcutt","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003E\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Routine Hypersonic Flight: The Final Frontier of Aeronautics\u0026quot; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EA talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. Kevin G. Bowcutt\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003EChief Scientist for Hypersonics\u003Cbr \/\u003E\r\nThe Boeing Company\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EGuggenheim 442 @ 3:30pm\u003C\/p\u003E\r\n\r\n\u003Cp\u003EEfforts to develop technologies enabling hypersonic flight have been ongoing since the late 1940\u0026rsquo;s. During this time substantial advancements have been made in hypersonic propulsion systems such as scramjets, high-temperature structural materials and thermal protection systems, and advanced vehicle design methods and tools. Taken together, these advancing technologies are moving mankind ever closer to achieving routine hypersonic flight, which will enable dramatically faster military missions and global transportation, and substantially more affordable space transportation.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis presentation will address the key technical aspects and challenges of hypersonic vehicle design, and will summarize progress made in maturing technologies critical to the development of practical hypersonic systems. The successful X-51A flight test program will be highlighted. The presentation will conclude by describing a vision for hypersonics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout Dr. Bowcutt...\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Kevin G. Bowcutt is a Boeing Senior Technical Fellow and Chief Scientist of Hypersonics for The Boeing Company, with 34 years of experience. He is an AIAA Fellow, a Fellow of the Royal Aeronautical Society, and a member of the National Academy of Engineering. He holds BS, MS and PhD degrees in aerospace engineering from the University of Maryland. Dr. Bowcutt is an internationally recognized expert in hypersonic aerodynamics, propulsion integration, and vehicle design and optimization. Notable accomplishments include developing the viscous-optimized waverider, originating the concept and optimizing the design of the X-51A scramjet-powered vehicle, and working on the Space Shuttle Columbia accident investigation simulating wing aero-thermal-structural failure. Dr. Bowcutt leads Boeing\u0026rsquo;s efforts to design and develop advanced hypersonic missiles, airplanes, and space-plane concepts.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022\u0022Routine Hypersonic Flight: The Final Frontier of Aeronautics\u0022 "}],"uid":"33975","created_gmt":"2016-11-11 18:36:05","changed_gmt":"2017-04-13 21:13:59","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-23T15:30:00-05:00","event_time_end":"2017-02-23T16:30:00-05:00","event_time_end_last":"2017-02-23T16:30:00-05:00","gmt_time_start":"2017-02-23 20:30:00","gmt_time_end":"2017-02-23 21:30:00","gmt_time_end_last":"2017-02-23 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583800":{"#nid":"583800","#data":{"type":"event","title":"AE Presents: Ecole Polytechnique\u0027s Emmanuel de Langre ","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EFluid-Structure Interactions in Plants, from Leaves to Canopies\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003Ea talk by\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Emmanuel de Langre\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EDepartment of Mechanics\u003Cbr \/\u003E\r\nEcole Polytechnique\u003C\/strong\u003E\u003Cbr \/\u003E\r\nParis\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe interactions between external flow and plants are fascinating, by the variety of geometries, motions, sizes and mechanisms involved. They also play an important role in the life of plants, and are a new source of bioinspiration, based on very robust solutions. I will summarize some recent results in the main topics involved, from static interactions to dynamics interactions, at the scale of leaves, whole plants and canopies. At each step I will try to underline some biomimetic perspectives and will exemplify this particularly on drag reduction and on vibration damping. Emphasis will be on the specificities of these fluid-structure interactions, in comparison with more classical aeroelasticity problems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EAbout Dr. Emmanuel de Langre\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Emmanuel de Langre is Professor of Mechanics in Ecole Polytechnique, Paris, France. He received his Ph.D. in Fracture Mechanics in 1984 and then worked until 1997 as an engineer in the French nuclear industry. He then joined Ecole Polytechnique to start a group on fluid-structure interactions. He is presently the Chief Editor of the Journal of Fluids and Structures. His present research interests are in the broad field of fluid-structure interaction (FSI) and include plant bio-mechanics, energy harvesting based on FSI, vortex-induced vibrations, wind effects and aeroelasticity. He is the author of a recent on-line course (MOOC) on fluid-solid interactions that attracted more than 3000 students.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EFluid-Structure Interactions in Plants, from Leaves to Canopies\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003Ea talk by\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Emmanuel de Langre\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EDepartment of Mechanics\u003Cbr \/\u003E\r\nEcole Polytechnique\u003C\/strong\u003E\u003Cbr \/\u003E\r\nParis\u003C\/h3\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Fluid-Structure Interactions in Plants, from Leaves to Canopies"}],"uid":"33975","created_gmt":"2016-11-11 18:50:40","changed_gmt":"2017-04-13 21:13:59","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-13T16:30:00-04:00","event_time_end":"2017-04-13T17:30:00-04:00","event_time_end_last":"2017-04-13T17:30:00-04:00","gmt_time_start":"2017-04-13 20:30:00","gmt_time_end":"2017-04-13 21:30:00","gmt_time_end_last":"2017-04-13 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583801":{"#nid":"583801","#data":{"type":"event","title":"AE Presents: University of Buffalo\u0027s John L. Crassidis","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. John L. Crassidis\u003Cbr \/\u003E\r\nCUBRC Professor in Space Situational Awareness \u0026amp;\u003Cbr \/\u003E\r\nDirector, Center for Multisource Information Fusion\u003Cbr \/\u003E\r\nDepartment of Mechanical \u0026amp; Aerospace Engineering\u003Cbr \/\u003E\r\nUniversity of Buffalo, State University of New York\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EMontgomery Knight 317 @ 3:30pm\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EEstimating the attitude of a rigid body has applications to many systems, including spacecraft, inertial navigation of aerial vehicles (both piloted and uninhabited), underwater vehicles, and robotic systems, to name a few.\u0026nbsp; The first known algorithm for attitude estimation dates back to 1970, which is based on the famous quasi-linear (extended) Kalman filter algorithm.\u0026nbsp; This algorithm has been the workhorse for most systems that require attitude knowledge.\u0026nbsp; Due to the inherent nonlinearities associated with attitude estimation, numerous nonlinear estimation techniques have been developed since that time.\u0026nbsp; Some have shown global, or near-global, convergence while others focus on robust methods to handle model errors or non-Gaussian characteristics. \u0026nbsp;Much less attention has been given to the problem of estimating vector state coordinates with respect to the attitude state coordinate frame.\u0026nbsp; This work presents a new error definition in which vector error quantities are defined using elements expressed in a common frame. \u0026nbsp;It is claimed here that the new error definition is more grounded theoretically than the usual error definition used by all other techniques.\u0026nbsp; Examples in spacecraft attitude estimation are given to show the advantage of the new error definition over the standard error definition.\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbout the speaker:\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. John L. Crassidis is the CUBRC Professor in Space Situational Awareness in the Department of Mechanical and Aerospace Engineering at the University at Buffalo (UB), State University of New York. \u0026nbsp;Before joining UB in 2001, he held previous academic appointments at the Catholic University of America and Texas A\u0026amp;M University.\u0026nbsp; He also held a position as a NASA Postdoctoral Research Fellow at Goddard Space Flight Center, where he worked on a number of spacecraft.\u0026nbsp; Currently, he is Director of UB\u0026rsquo;s Center for Multisource Information Fusion, which is the only dedicated university data fusion center in the country.\u0026nbsp; It is involved in basic research and developmental programs through various government laboratories, companies and university partners.\u0026nbsp; He is also Director of UB\u0026rsquo;s Nanosatellite Laboratory.\u0026nbsp; Dr. Crassidis is a Fellow of the American Astronautical Society, and a Fellow of the American Institute of Aeronautics and Astronautics.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. John L. Crassidis\u003Cbr \/\u003E\r\nCUBRC Professor in Space Situational Awareness \u0026amp;\u003Cbr \/\u003E\r\nDirector, Center for Multisource Information Fusion\u003Cbr \/\u003E\r\nDepartment of Mechanical \u0026amp; Aerospace Engineering\u003Cbr \/\u003E\r\nUniversity of Buffalo, State University of New York\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EMontgomery Knight 317 @ 3:30pm\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"John Crassidis, CUBRC Professor in Space Situational Awareness and Director of the Center for Multisource Information Fusion will speak"}],"uid":"33975","created_gmt":"2016-11-11 19:01:31","changed_gmt":"2017-04-13 21:13:59","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-20T16:30:00-04:00","event_time_end":"2017-04-20T17:30:00-04:00","event_time_end_last":"2017-04-20T17:30:00-04:00","gmt_time_start":"2017-04-20 20:30:00","gmt_time_end":"2017-04-20 21:30:00","gmt_time_end_last":"2017-04-20 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583810":{"#nid":"583810","#data":{"type":"event","title":"Brown Bag Presents: Arjun Krishnan, Ashwin Krishan \u0026 Komahan Boopathy ","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to a\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EAE Brown Bag Lunch\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Efeaturing presentations by 3 AE students:\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EArjun Krishnan\u0003 \u0026amp; Ashwin Krishan\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E\u0026quot;World\u0026rsquo;s First Flight Demonstration\u0026nbsp; of Aero-Effected Bleed Air Roll Control \u0026quot;\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eand\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EKomahan Boopathy \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E\u0026ldquo;Adjoint-Based Derivative Evaluation Methods for Flexible Multibody Systems \u0026rdquo;\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch1\u003E\u003Cem\u003E\u003Cstrong\u003Eabout the talks:\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026quot;World\u0026rsquo;s First Flight Demonstration\u0026nbsp; of Aero-Effected Bleed Air Roll Control \u0026quot;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHinged flaps are archetypical scheme of effecting control forces and moments in fixed wing aircraft. Aero-effected bleed air offers an alternate means of controlling aircraft and has advantages over the hinged flap in certain types of aircraft. Unlike other flow control technologies, the energy for aero-effected bleed air control is derived from the motion of the vehicle. The idea is to have multiple pores on the top and bottom surfaces of a wing. By opening channels between these pores using low power actuators, it is possible to exploit inherent pressure differences to create an ejection or suction that interacts with the local cross flow, causing a change in local pressure. Effected across a section of wing, it results in a force or moment that can be used to control an aircraft. Wind tunnel experiments have demonstrated the technology\u0026#39;s ability to generate rolling moments equivalent to those of ailerons with minimal drag penalty. The Georgia Tech CAMM Lab FLD-25 is the world\u0026rsquo;s first fixed wing aircraft to demonstrate aero-effected bleed air roll control in flight. The aircraft achieved roll rates of 100 deg\/s at cruise velocity with extremely low power actuators. Our presentation will discuss the development of the aircraft, the data gathered and the path forward including potential applicability of this technology.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026quot;World\u0026rsquo;s First Flight Demonstration\u0026nbsp; of Aero-Effected Bleed Air Roll Control\u0026quot;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAdjoint formulations are central to many modern algorithms for sensitivity analysis, gradient-based design optimization, mesh refinement, optimal control and error estimation. With the adjoint-method, the computational cost in evaluating the derivatives is nearly independent of the number of design variables in the problem. Adjoint-based derivative evaluation methods for second-order systems arising in flexible multibody dynamics are presented. The governing equations of motion are solved using implicit time marching schemes: backward difference formulae, diagonally implicit Runge-Kutta, Newmark-Beta-Gamma and Adams-Bashforth-Moulton methods. The time-dependent discrete adjoint for these methods are presented along with complex-step verification of the derivatives.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThis is a School of Aerospace Engineering tradition in which select students present their research before an audience that includes their peers and advisors. Lunch is served.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"The Final Brown Bag Seminar of the Semester"}],"uid":"27836","created_gmt":"2016-11-11 23:59:35","changed_gmt":"2017-04-13 21:13:59","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-11-18T12:00:00-05:00","event_time_end":"2016-11-18T13:00:00-05:00","event_time_end_last":"2016-11-18T13:00:00-05:00","gmt_time_start":"2016-11-18 17:00:00","gmt_time_end":"2016-11-18 18:00:00","gmt_time_end_last":"2016-11-18 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"4096","name":"brown bag"},{"id":"365","name":"Research"},{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"583811":{"#nid":"583811","#data":{"type":"event","title":"Doctoral Thesis Proposal: Yong-Boon Kong","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EPh.D. Thesis Proposal by\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EYong-Boon Kong\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Prof. J.V.R. Prasad\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDEVELOPMENT OF A FINITE STATE COAXIAL ROTOR DYNAMIC INFLOW MODEL\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E9 a.m. Monday, December 5\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery-Knight Building Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EABSTRACT\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAccurate modeling of rotor inflow dynamics in flight simulations is crucial for rotorcraft performance and handling qualities evaluations. While inflow predictions based on momentum theory give good results in hover, they do not produce the accuracy needed in forward flight. On the other hand, high-fidelity Computational Fluid Dynamics (CFD) models take up a significant amount of computational time to be feasible for use in real-time simulators. The finite state Peters-He inflow model satisfies both accurate inflow prediction and computational efficiency requirements. However, the inflow model is only applicable for single rotor configurations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ERecent published work on coaxial rotor configurations focus on performance related studies, which are not compatible for use in real-time rotor inflow simulations. The main challenge in coaxial rotor inflow modeling is to account for mutual aerodynamic interference effects between upper and lower rotors. While system identification approach can be used to obtain dynamic models associated with rotor inflows, this method is only feasible for small scale coaxial rotor Unmanned Aerial Vehicles (UAVs). For full scale vehicles such as the Sikorsky S-97 Raider, mathematical models to predict rotor inflows are still the desirable option.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, a novel approach to formulate a coaxial rotor inflow model from first principles by superposition of upper and lower rotor pressure loadings is explored. By representing both rotors\u0026rsquo; pressure and downwash with harmonic and radial expansion terms, a finite state coaxial rotor inflow model known as the Pressure Potential Superposition Inflow Model (PPSIM) is developed. Effects of both rotors mutual aerodynamic interferences are taken into account in PPSIM inflow equation. Steady hover inflow predictions from PPSIM match well with CFD results. In forward flight, corrections to PPSIM inflow equation to account for wake distortion effects are identified using GT-Hybrid (free-wake model) solutions. An analytical method is used to identify time delays associated with propagation of upper rotor inflow perturbations onto lower rotor. Time delay terms are incorporated into PPSIM and evaluation of its dynamic responses is performed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProfessor J.V.R. Prasad AE, Georgia Tech\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Lakshmi N. Sankar AE, Georgia Tech\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Marilyn J. Smith AE, Georgia Tech\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor Daniel P. Schrage AE, Georgia Tech\u003C\/li\u003E\r\n\t\u003Cli\u003EProfessor David A. Peters, Washington University in St. Louis\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EYong-Boon Kong will present plans for doctoral research entitled \u0026quot;\u0026quot;Development of a Finite State Coaxial Rotor Dynamic Inflow Model\u0026quot; before a committe to include faculty advisor Prof. J. V. R Prasad\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022Development of a Finite State Coaxial Rotor Dynamic Inflow Model\u0022"}],"uid":"27836","created_gmt":"2016-11-12 00:35:54","changed_gmt":"2017-04-13 21:13:59","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-05T09:00:00-05:00","event_time_end":"2016-12-05T11:00:00-05:00","event_time_end_last":"2016-12-05T11:00:00-05:00","gmt_time_start":"2016-12-05 14:00:00","gmt_time_end":"2016-12-05 16:00:00","gmt_time_end_last":"2016-12-05 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"1325","name":"aerospace"},{"id":"122941","name":"doctoral research"},{"id":"3395","name":"proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"584028":{"#nid":"584028","#data":{"type":"event","title":"Ph.D. Thesis Defense: Jean-Baptiste P.M. Bouquet","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Defense by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EJean-Baptiste P. M. Bouquet\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Prof. Julian J. Rimoli\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EA Concurrent Multiscale Model for the Thermomechanical Response of Polycrystalline Materials\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDecember 2, 2016 - 10:00 AM, Montgomery-Knight building - Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe presented work establishes and implements a novel concurrent multiscale framework to predict the size-dependent thermomechanical response of engineering materials. As such, it focuses on determining the interactions among length scales. More precisely, it aims at capturing the local variations on thermal conductivity at the subgrain level, the repercussion on the mesoscopic temperature field, and the consequent impact on thermal stresses. Therefore, the ultimate goal is to better understand the role of the grain size and the grain shape on heat transfer of polycrystalline materials and the influence on the underlying thermal stresses concentration, driving to the localized failure of the material.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA review of current modeling approaches reveals a lack of numerical tools in the determination of the size effect on geometries presenting complex features. Indeed, current numerical methods are only capable of modeling thermomechanical processes at the macroscale. In contrast, analytical models have been developed to quantify the size effect in subgrain structures, but the applications are limited to relatively simple geometries such as thin films, nanowires or single cubic grains. To bridge that gap, a novel concurrent multiscale framework is developed herein to account for any arbitrary microstructural configuration. The proposed technique is achieved by capturing the microscale size effect on the thermal conductivity and incorporating it into the macroscale analysis. In particular, the multiscale scheme accounts for: (a) a submicron scale model for the thermal conductivity based on the Boltzmann transport equation under the relaxation time approximation, (b) a classic Fourier heat transport model at the mesoscale, and (c) a continuum model of thermomechanical deformation that explicitly resolves the microscopic geometric features of the material. The capabilities of the model are demonstrated through a series of examples, which highlight the potential of the procedure for designing materials with enhanced thermomechanical responses.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAmong other applications, this research uses the developed concurrent multiscale framework to analyze the influence of the microscopic features on the thermal and thermomechanical properties. In particular, the analysis of functionally graded polycrystals is performed, highlighting the influence of the grain size distribution on the temperature field and on the thermal stress distribution. From those results, further novel optimization approaches are conducted using length-dependent modeling of polycrystalline materials. More specifically, the size-dependent thermal properties obtained from the model are coupled with an adaptive topology optimization algorithm to improve the spatial grain size distribution on single-material polycrystalline systems. This technique creates a unique tool for the manufacturing of single-material systems with enhanced thermal properties. Finally, this framework provides a physically based and accurate computational tool for defining a \u0026lsquo;MFP calibrated\u0026rsquo; Kapitza resistance at the grain boundary, where both the Kapitza resistance and the intragranular thermal conductivity are size-dependent. This particular study highlights the benefits of the innovative concurrent multiscale framework for the study of thermomechanical phenomena. It notably allows to recover the accurate effective thermal conductivity of polycrystals. Additionally, it reduces spurious temperature jumps and related thermal stresses at the grain boundary, that appears to be artifacts of the current numerical approaches.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Julian J. Rimoli, AE - Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Massimo Ruzzene, AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Min-Feng Yu, AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Graeme Kennedy, AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Min Zhou, ME\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJean-Baptiste P.M. Bouquet will present his defense for doctoral research \u0026quot;A Concurrent Multiscale Model for the Thermomechanical Response of Polycrystalline Materials\u0026quot;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022A Concurrent Multiscale Model for the Thermomechanical Response of Polycrystalline Materials\u0022"}],"uid":"33975","created_gmt":"2016-11-18 14:08:10","changed_gmt":"2017-04-13 21:13:56","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-02T10:00:00-05:00","event_time_end":"2016-12-02T13:00:00-05:00","event_time_end_last":"2016-12-02T13:00:00-05:00","gmt_time_start":"2016-12-02 15:00:00","gmt_time_end":"2016-12-02 18:00:00","gmt_time_end_last":"2016-12-02 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"584658":{"#nid":"584658","#data":{"type":"event","title":"Career Info Session: University of South Carolina","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EFind out about \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003EGraduate and Post-doc Positions\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eat the\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EUniversity of South Carolina\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Epresentations to be made by \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Hossein Haj-Hariri, Dean, College of Engineering and Computing, \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Michael Van Tooren, SmartState\u0026trade; Chair for Multifunctional Materials and Structures and Director of the SmartState\u0026trade; Center for Multifunctional Materials and Structures (MFMS) \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003EThe Advanced Composite Manufacturing Laboratory within the McNAIR Center at USC is home to the only university-based production-level Automated Fiber Placement machine\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003Ein the U.S.The center is looking for candidates to join the team on the following research topics:\u003C\/div\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EMechanics of defects and manufacturing features\u003C\/li\u003E\r\n\t\u003Cli\u003EDesign and manufacturing of composites\u003C\/li\u003E\r\n\t\u003Cli\u003EJoining technologies for thermoplastic composites\u003C\/li\u003E\r\n\t\u003Cli\u003EAdditive manufacturing of continues carbon fiber reinforced composites Production analytics\u003C\/li\u003E\r\n\t\u003Cli\u003ENon-destructive testing and evaluation\u003C\/li\u003E\r\n\t\u003Cli\u003ERobotics for composites manufacturing\u003C\/li\u003E\r\n\t\u003Cli\u003ECertification of non-conventional composites\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EThe McNAIR Center for Aerospace Innovation and Research was founded in 2011 in honor of Ronald E. McNair, a Lake City, South Carolina native and astronaut who lost his life in the Challenger accident. The McNAIR Center\u0026rsquo;s unique reseach, education, workforce development and industry advancement model takes a multifaceted approach to stimulatingaerospace industry growth in the Palmetto State\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EUSC\u0026#39;s Dr. Van Tooren and Dean Haj-Hariri will speak about the graduate and post-graduate positions available\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"USC\u0027s Dr. Van Tooren and Dean Haj-Hariri will speak"}],"uid":"27836","created_gmt":"2016-12-05 20:47:27","changed_gmt":"2017-04-13 21:13:43","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-09T11:00:00-05:00","event_time_end":"2016-12-09T12:00:00-05:00","event_time_end_last":"2016-12-09T12:00:00-05:00","gmt_time_start":"2016-12-09 16:00:00","gmt_time_end":"2016-12-09 17:00:00","gmt_time_end_last":"2016-12-09 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"584929":{"#nid":"584929","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Leah Josefine Ruckle","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal b\u003C\/strong\u003Ey\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ELeah Josefine Ruckle\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Prof. Dimitri N. Mavris\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:30 AM, Wednesday, December 14, 2016\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cem\u003E\u003Cstrong\u003EWeber Space Science and Technology Building (SST-II)\u003Cbr \/\u003E\r\nCollaborative Visualization Environment (CoVE)\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EA Multidisciplinary Approach to Solving the Express Shipment Service Network Design Problem\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EExpress service package delivery is a multi-billion dollar industry in the United States and abroad. It has become an essential part of business operations and, with the rise of e-commerce, an expectation of the everyday consumer. Express package delivery is challenged by extremely tight service guarantees, the huge volume of material that must be moved in a multimodal network, and the large geographical area of guaranteed service. These challenges necessitate the use of large jet aircraft fleets, thus prompting the desire of package delivery companies to use these aircraft as efficiently as possible.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EExpress package delivery operations are mathematically modeled as a type of service network design problem called the express shipment service network design problem (ESSNDP). The resulting mixed integer linear program is too large to solve exactly within a reasonable runtime for realistic problem instances and so approaches such as branch-and-price, column generation, neighborhood search heuristics and Benders decomposition are used to produce high-quality solutions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis work explores the effectiveness of multidisciplinary design optimization (MDO) to solve the ESSNDP, a previously untested approach. Multidisciplinary design optimization is a popular optimization technique, particularly within aerospace and mechanical engineering, which is used in the design of complex physical systems such as aircraft, spacecraft, automobiles, wind turbines and bridges. In MDO, large and complex optimization problems are solved by decomposing the problem into disciplines, solving those disciplines semi-independently, and iteratively reconciling the differences between the disciplines until a high-quality feasible solution emerges.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe ESSNDP decomposes into two well-structured subproblems. One is the package routing subproblem which decides how the packages will flow through the network from their origins to their destinations via at least one sorting hub. The other is the aircraft scheduling subproblem which decides how to assign the limited heterogeneous fleet to arcs in the network to provide capacity to move the packages. These two subproblems can then be used and solved as disciplines in an MDO architecture.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMultidisciplinary design optimization has proven itself to be useful in other, physical, design realms, but it has not been applied to logistics problems. I will explore its effectiveness in solving the ESSNDP, a large and complex logistics problem, and compare its performance to an undecomposed approach and a Benders decomposition approach.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProfessor Dimitri N. Mavris, GT AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProfessor Brian J. German, GT AE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProfessor Alejandro Toriello, GT ISYE\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ELeah Josefine Ruckle will present her proposal for doctoral research in \u0026quot;A Multidisciplinary Approach to Solving the Express Shipment Service Network Design Problem\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022A Multidisciplinary Approach to Solving the Express Shipment Service Network Design Problem\u201d"}],"uid":"33975","created_gmt":"2016-12-12 15:52:13","changed_gmt":"2017-04-13 21:13:39","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-14T09:30:00-05:00","event_time_end":"2016-12-14T11:30:00-05:00","event_time_end_last":"2016-12-14T11:30:00-05:00","gmt_time_start":"2016-12-14 14:30:00","gmt_time_end":"2016-12-14 16:30:00","gmt_time_end_last":"2016-12-14 16:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"584947":{"#nid":"584947","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Nunthadech Rodcheuy","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ENunthadech Rodcheuy\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. George A. Kardomateas)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAdvanced High Order Theories and Elasticity Solutions for Curved Sandwich Composite Panels\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:00 AM, Friday, December 16, 2016\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EA new one-dimensional Extended High order Sandwich Panel Theory (EHSAPT) for curved panels is presented. The theory accounts for the sandwich core compressibility in the radial direction as well as the core circumferential rigidity. Two distinct core displacement fields are proposed and investigated. One is a logarithmic (it includes terms that are linear, inverse, and logarithmic functions of the radial coordinate). The other is a polynomial (it consists of second and third order polynomials of the radial coordinate) and it is an extension of the corresponding field for the flat panel. In both formulations the two thin curved face sheets are assumed to be perfectly bonded to the core and follow the classical Euler-Bernoulli beam assumptions. Then, the linear elasticity problem formulation and solution for a generally asymmetric sandwich curved beam\/panel consisting of orthotropic core and face sheets, which is subjected to a top face distributed transverse loading is presented. The displacement approach is used and the panel is assumed to be simply supported at the ends and closed form solutions for the displacements and stresses are derived. Next, due to the curvature, the first order shear deformation (FOSD) theory for curved sandwich panels is not a direct extension of the corresponding one for flat panels and thus, it is formulated accordingly, and its unique features, such as the reference curve, are discussed. Three versions of the FOSD theory are formulated: the one based on direct variational formulation based on the assumed through-thickness displacement field (termed \u0026ldquo;basic\u0026rdquo;), one based on the definition of an equivalent shear modulus for the section (termed \u0026ldquo;Geq\u0026rdquo;) and one based on derivation of a shear correction factor, which is considered in conjunction with the equivalent shear modulus. In addition, the classical theory for curved sandwich panels which does not include transverse shear is also presented. The results from following: the new proposed EHSAPT, compressive high order sandwich panel theory HSAPT (from literature), three variants FOSD theory, and Classical theory are compared with Elasticity which serves as a benchmark in assessing the accuracy of the various sandwich panel theories. The case examined is a simply supported curved sandwich panel subjected to a distributed transverse load, for which a closed form elasticity solution is formulated. It is shown that the new EHSAPT is the most accurate (regardless of geometry and material) among other presented theories with the logarithmic formulation is more accurate than the polynomial.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ENunthadech Rodcheuy will present a proposal for doctoral research in\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026ldquo;Advanced High Order Theories and Elasticity Solutions for\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECurved Sandwich Composite Panels\u0026rdquo;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u201cAdvanced High Order Theories and Elasticity Solutions for  Curved Sandwich Composite Panels\u201d"}],"uid":"33975","created_gmt":"2016-12-12 20:30:25","changed_gmt":"2017-04-13 21:13:39","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-16T09:00:00-05:00","event_time_end":"2016-12-16T12:00:00-05:00","event_time_end_last":"2016-12-16T12:00:00-05:00","gmt_time_start":"2016-12-16 14:00:00","gmt_time_end":"2016-12-16 17:00:00","gmt_time_end_last":"2016-12-16 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"585556":{"#nid":"585556","#data":{"type":"event","title":"Info Session: Grads\/Undergrads Needed for Satellite Project","body":[{"value":"\u003Cp\u003EFind out more about\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EResearch Opportunities \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ewith the\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ERANGE and USIP\u003C\/strong\u003E\u003Cstrong\u003E Satellite Programs\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003Eon\u003Cbr \/\u003E\r\nTuesday, January 10\u003Cbr \/\u003E\r\n5 - 6 p.m.\u003Cbr \/\u003E\r\nGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EBring your resume and your questions.\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Gunter \u003C\/strong\u003Eis looking for smart, energetic, hard-working undergrads and grads from AE, ME, ECE, CS to work on two satellite projects.\u0026nbsp;\u003Cbr \/\u003E\r\n\u003Cstrong\u003ENOTE\u003C\/strong\u003E: \u003Cem\u003EThese projects are open to US citizens or permanent residents only\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFind out more from Dr. Gunter: \u003Cstrong\u003E\u003Ca href=\u0022mailto:brian.gunter@aerospace.gatech.edu?subject=USIP%20or%20RANGE\u0022\u003Ebrian.gunter@aerospace.gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAE professor \u003Cstrong\u003EDr. Gunter \u003C\/strong\u003Eis looking for smart, energetic, hard-working undergrads and grads from AE, ME, ECE \u0026amp; CS to work on two satellite projects: RANGE and USIP. Join him for this info session at 5 p.m. on Jan. 10.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ENOTE\u003C\/strong\u003E: \u003Cem\u003EThese projects are open to US citizens or permanent residents only\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"AE professor Brian Gunter will present research opportunities for two satellite projects. Grads and undergrads welcome. "}],"uid":"27836","created_gmt":"2017-01-05 17:48:30","changed_gmt":"2017-04-13 21:13:28","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-01-10T17:00:00-05:00","event_time_end":"2017-01-10T18:00:00-05:00","event_time_end_last":"2017-01-10T18:00:00-05:00","gmt_time_start":"2017-01-10 22:00:00","gmt_time_end":"2017-01-10 23:00:00","gmt_time_end_last":"2017-01-10 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168741","name":"satellite research"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Ca href=\u0022mailto:brian.gunter@aerospace.gatech.edu?subject=USIP%20or%20RANGE\u0022\u003Ebrian.gunter@aerospace.gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"586080":{"#nid":"586080","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Alexandra Cheryl Long","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Dissertation Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAlexandra Cheryl Long\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. David Spencer\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDevelopment of Passively Stable Pyramid Sail ([ps]\u003Csup\u003E2\u003C\/sup\u003E) to Deorbit Small Satellites\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E3 p.m., Monday, January 30, \u003Cem\u003EMontgomery Knight Building -317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOrbital debris is a growing problem in low-Earth orbit; it has crossed a threshold of critical density where the number of debris objects will grow exponentially due to collisions unless actively mitigated. There are a number of commercial companies that intend to launch hundreds to thousands of micro-satellites in Low-Earth Orbit at altitudes ranging from 1,000-1,200 km with the goal of providing global internet service. The need to deorbit these microsatellites at the end of their operational lifetime is apparent. \u0026nbsp;This study investigates a standardized bolt-on system to address the deorbit problem for microsatellites, with applicability to planned large constellations of 150 kg-class satellites at 1,100-1,200 km altitudes. Through a trade study, it was determined that a passive drag sail device provides a reliable approach for satellite deorbit.\u0026nbsp; To reliably deorbit within 25 years, the drag sail should be designed to provide aerodynamic stability, trimming to a maximum drag attitude. A stability analysis determine that the sail should be a square pyramid shape with an apex half-angle of 75\u0026deg; to ensure stability. Prototype hardware development for the drag device is planned, with three main phases. The first is the boom deployer design and analysis, which includes prototype development and an analysis on boom blossoming in the system. The second is the sail mounting design, which includes connecting the sail segments to the booms and folding them for the stowed configuration. The final phase is the system prototype testing to ensure that the booms and sails deploy together creating the desired shape.\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003EDr. E. Glenn Lightsey\u003Cbr \/\u003E\r\nAerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EDr. Julian Rimoli\u003Cbr \/\u003E\r\nAerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMr. Mark Schoenenberger\u003Cbr \/\u003E\r\nAtmospheric Flight and Entry Systems Branch\u003Cbr \/\u003E\r\n\u003Cem\u003ENASA Langley Research Center\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMr. Les Johnson\u003Cbr \/\u003E\r\nAdvanced Concepts Office\u003Cbr \/\u003E\r\n\u003Cem\u003ENASA Marshall Space Flight Center\u003C\/em\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EAlexandra Cheryl Long \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ewill present her proposal for doctoral research in the\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026quot;Development of Passively Stable Pyramid Sail ([ps]\u003Csup\u003E2\u003C\/sup\u003E) to Deorbit Small Satellites\u0026quot;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E3 p.m., Monday, January 30 \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building -317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022Development of Passively Stable  Pyramid Sail ([ps]2) to Deorbit Small Satellites\u0022"}],"uid":"33975","created_gmt":"2017-01-17 19:55:45","changed_gmt":"2017-04-13 21:13:16","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-01-30T15:00:00-05:00","event_time_end":"2017-01-30T17:00:00-05:00","event_time_end_last":"2017-01-30T17:00:00-05:00","gmt_time_start":"2017-01-30 20:00:00","gmt_time_end":"2017-01-30 22:00:00","gmt_time_end_last":"2017-01-30 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"586230":{"#nid":"586230","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Hisham K. Ali","body":[{"value":"\u003Cp\u003EPh.D. Thesis Proposal by\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EHisham K. Ali\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Prof. Robert D. Braun\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EMagnetohydrodynamic Energy Generation and Flow Control for Planetary Entry Vehicles \u0026nbsp;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E1 p.m., Friday, January 27, Weber Building CoDE Auditorium\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProposed missions such as a Mars sample return mission and a human mission to Mars require landed payload masses in excess of any previous Mars mission. Whether human or robotic, these missions present numerous engineering challenges due to their increased mass and complexity. To overcome these challenges, new technologies must be developed, and existing technologies advanced. Resource utilization technologies are particularly critical in this effort. This thesis aims to study the reclamation and harnessing of vehicle kinetic energy through magnetohydrodynamic (MHD) interaction with the high temperature entry plasma. Potential mission designs, power generation and power storage configurations are explored, as well as uses for the reclaimed energy. Furthermore, the impact and utility of MHD flow interaction for vehicle control is assessed. The state of the art for analysis of MHD equipped planetary entry systems is advanced, with the specific goals including: development of performance analysis capabilities for potential MHD equipped systems, identification of systems or configurations that show promise as effective uses of MHD power generation, experimental designs for developing technologies applicable to MHD power generation systems, assessment of MHD flow interaction and beneficial use for entry vehicle control through drag modulation, and increasing the technology readiness level of MHD power generation architectures for entry, descent and landing\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECOMMITTEE MEMBERS:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EDr. Mitchell L.R. Walker (co-advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Stephen M. Ruffin\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Robert W. Moses\u0026nbsp; - NASA Langley Research Center\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. James E. Polk \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;- NASA Jet Propulsion Laboratory\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EHisham K. Ali will present his proposal for doctoral research in Magnetohydrodynamic Energy Generation and Flow Control for Planetary Entry Vehicles \u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022Magnetohydrodynamic Energy Generation and Flow Control for Planetary Entry Vehicles \u0022 "}],"uid":"33975","created_gmt":"2017-01-20 16:24:04","changed_gmt":"2017-04-13 21:13:14","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-01-27T13:00:00-05:00","event_time_end":"2017-01-27T15:00:00-05:00","event_time_end_last":"2017-01-27T15:00:00-05:00","gmt_time_start":"2017-01-27 18:00:00","gmt_time_end":"2017-01-27 20:00:00","gmt_time_end_last":"2017-01-27 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"586724":{"#nid":"586724","#data":{"type":"event","title":"AE Presents: Virginia Tech\u0027s Roger Simpson ","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Roger Simpson\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003EProfessor Emeritus of Aerospace and Ocean Engineering\u003Cbr \/\u003E\r\nVirginia Polytechnic Institute and State University\u003C\/h2\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Some Advanced Laser Diagnostics for High Speed Turbulence\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight Rm 317, 11 a.m.\u0026nbsp; - 12 p.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003ERecent advances in optics, photo detection, data acquisition hardware, and software provide opportunities to obtain low uncertainty time-dependent laser-Doppler velocimeter experimental data for high-speed turbulent flows, using only one access window. The innovation of using both parallel and diverging fringe patterns determines the particle position within 10 microns uncertainty and provides velocity profiles over a focal volume length. Small sub-micron seeding particles follow the high-speed turbulent eddies. A survey of applications of these advances to high-speed complex flows will be presented, including transonic, supersonic, and hypersonic flows. Miniature portable probe heads are being used inside wind tunnel models.\u0026nbsp; Galvanometer scanners have been used to survey large flow areas.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EBME, University of Virginia, 1964: MSME, 1965 and Ph.D., 1968, Stanford University. For 44 years at Southern Methodist University and Virginia Tech he developed and used experimental techniques such as laser-Doppler velocimetry for measurements of complex turbulent flows, such as various separated, wing-body junction, rough wall, and high-speed flows. His work includes over 50 government reports and 250 open literature publications and invited review articles on turbulent flows and their structure, separated flows, flow around buildings, \u003Cstrong\u003Elaser-based measurement technologies, \u003C\/strong\u003Eand several\u0026nbsp; restricted ONR reports on the control of turbulent flows.\u0026nbsp; He is a Fellow of AIAA and other professional societies and has served AIAA in a number of offices, including AIAA President (2005 \u0026ndash; 2007) and Chair of the AIAA Foundation Board of Trustees (2008- 2009), as well as Chair of the American Association of Engineering Societies (2010).\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Some Advanced Laser Diagnostics for High Speed Turbulence\u0022"}],"uid":"33975","created_gmt":"2017-01-31 21:05:43","changed_gmt":"2017-04-13 21:13:02","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-02T11:00:00-05:00","event_time_end":"2017-03-02T12:00:00-05:00","event_time_end_last":"2017-03-02T12:00:00-05:00","gmt_time_start":"2017-03-02 16:00:00","gmt_time_end":"2017-03-02 17:00:00","gmt_time_end_last":"2017-03-02 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"586827":{"#nid":"586827","#data":{"type":"event","title":"AE Presents: Prof. Francesco Carbone, Yale University ","body":[{"value":"\u003Cp\u003EYou are invited to hear\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Unveiling the Gas-to-Particles Transition in Flames: Resolving a Centuries-old Challenge\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EFrancesco Carbone\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDepartment of Mechanical Engineering and Materials Science\u003Cbr \/\u003E\r\nYale University\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight Room 317, 11 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EFlame-based technologies have ancient origins but still dominate the vast majority of energy conversion applications. They involve the formation of particles that are either pollutant byproducts of the process, primarily in the form of a carbonaceous material, i.e. soot, or, in some cases, engineered materials produced commercially (e.g., carbon black). Unveiling the fundamental mechanisms causing the gaseous reactants\/intermediates in a flame to transition to particles is crucial from a fundamental perspective, but has also a practical impact, since the ability to control such a transition may yield substantial improvements in the flame processes. Such improvements would benefit the environment, climate and human health through emission abatement. Additionally, the fundamental knowledge gained could provide improved routes for large scale manufacturing of advanced materials.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe unresolved challenge of unveiling the gas-to-particle transition mechanisms in flames resides in the intrinsic difficulty to interrogate experimentally the growth chemistry of the gas phase and the physics of the aerosol in the nanometric dimensional scale of relevance, while minimizing the perturbation of the flame. I will present an overview of the results obtained with some innovative approaches in controlled sampling of both gas and particle phases and parametric variation of flame conditions (e.g., temperature). One approach provided an extensive experimental database of the gas phase structure of flames at pressures up to 25 bar, including the concentration profiles of polycyclic aromatic hydrocarbons, whose chemistry is fundamental to soot formation mechanisms. Perhaps remarkably, another approach has allowed for a virtually artifact-free measurement of the size distribution function of nascent soot particles in the dimensional range below 10 nm (i.e., at the molecule-to-particle transition, which I seek to help define). These novel experimental results highlighted pitfalls in the existing literature and areas of improvement in the understanding soot nucleation.\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFrancesco Carbone\u003C\/strong\u003E is an Associate Research Scientist in the Department of Mechanical Engineering and Materials Science at Yale University. His research focuses on multiphase reactive flows for energy applications and encompasses reaction kinetics, transport phenomena and aerosol dynamics. He authored over fifteen articles on peer-reviewed journals and contributed to the understanding of the fundamental mechanisms leading to pollutant nanoparticle emissions from combustion applications. He graduated with a PhD in Chemical Engineering from the University of Naples Federico II (Italy) and was subsequently appointed for postgraduate research positions in the Combustion Research Institute at the National Research Council (Italy, 2009-2010), in the Department of Mechanical Engineering at Yale University (2010-2012), and in the Department of Aerospace and Mechanical Engineering at the University of Southern California (2012-2014.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Unveiling the Gas-to-Particles Transition in Flames: Resolving a Centuries-old Challenge\u0022"}],"uid":"33975","created_gmt":"2017-02-02 19:14:37","changed_gmt":"2017-04-13 21:13:01","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-08T11:00:00-05:00","event_time_end":"2017-02-08T12:00:00-05:00","event_time_end_last":"2017-02-08T12:00:00-05:00","gmt_time_start":"2017-02-08 16:00:00","gmt_time_end":"2017-02-08 17:00:00","gmt_time_end_last":"2017-02-08 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"586879":{"#nid":"586879","#data":{"type":"event","title":"AE Presents: Luca Carlone, ","body":[{"value":"\u003Ch3\u003EThe Daniel Guggenheim School of Aerospace Engineering\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eis proud to present\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Luca Carlone\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EResearch Scientist at MIT\u0026#39;s Information \u0026amp; Decision Systems Lab\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E\u0026quot;From Hummingbirds to Honeybees: Algorithms for Agile Micro Aerial Vehicles with On-board Perception\u0026rdquo;\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, February 20 at 12 noon\u003Cbr \/\u003E\r\nMontgomery Knight 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAgile micro aerial vehicles will have a massive societal impact over the next decades, creating novel opportunities for large-scale precision agriculture, fast delivery of medical supplies, and disaster response, and providing new perspectives on environmental monitoring and artificial pollination. This future requires the design of robust and lightweight perception algorithms, which interpret sensor data into a coherent world representation, enabling on-board situational awareness and decision-making.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this talk, I present my work on robust and lightweight robot perception, including the design of algorithms for fast visual-inertial navigation and the development of the first certifiably correct approach for localization and mapping. I also discuss the challenges connected to scaling down perception to nano and pico aerial vehicles, where sensing and computation are subject to strict payload and power constraints. I argue that enabling autonomy on miniaturized platforms requires a paradigm shift in perception, sensing, and communication, and discuss how we can draw inspiration from nature in designing the next generation of flying robots.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout the speaker\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELuca Carlone is a research scientist in the Laboratory for Information and Decision Systems at the Massachusetts Institute of Technology. Before joining MIT, he was a postdoctoral fellow at Georgia Tech (2013-2015), and a visiting researcher at the University of California Santa Barbara (2011). He got his Ph.D. from the Polytechnic University of Turin, Italy, in 2012. His research interests include nonlinear estimation, numerical and distributed optimization, computer vision and probabilistic inference applied to sensing, perception, and control of single and multi robot systems. He published more than 60 papers on international journals and conferences, including a best paper award finalist at RSS 2015 and a best paper award winner at WAFR 2016.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Carlone will give a public lecture"}],"uid":"27836","created_gmt":"2017-02-02 21:50:24","changed_gmt":"2017-04-13 21:13:00","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-20T12:00:00-05:00","event_time_end":"2017-02-20T13:00:00-05:00","event_time_end_last":"2017-02-20T13:00:00-05:00","gmt_time_start":"2017-02-20 17:00:00","gmt_time_end":"2017-02-20 18:00:00","gmt_time_end_last":"2017-02-20 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"586881":{"#nid":"586881","#data":{"type":"event","title":"AE Brown Bag Lunch Presents: Benjamin Leon \u0026 Terry Stevenson","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to the \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDaniel Guggenheim School of Aerospace Engineering\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBrown Bag Lunch\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003EFebruary 10, 12 - 1 p.m., The Guggenheim Building 442\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cem\u003E\u003Cstrong\u003ELunch Provided\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Efeaturing \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Force Sensing Through a Rubber Encapsulated Pressure Sensor with a Controlled Air Cavity\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea presentation by \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBenjamin Leon\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Eand \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Development of a 3D Printed Cold Gas Thruster for BioSentinel\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea presentation by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003ETerry Stevenson\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003ELeon\u0026#39;s Presentation:\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGround contact and force detection sensors are of critical technical importance in the realization of articulated legged robots capable of navigating unknown or challenging terrains. Requirements for field deployed sensors include ease of manufacture, durability, and consistency over time. Current force and contact sensors are cost prohibitive, unreliable, require training throughout time, or the sensing range is unsuitable for the application. In this talk, the development of a new force sensor meant to address the aforementioned issues on a rotorcraft robotic landing gear platform is presented. This force sensor is based on a custom elastomer dome with a tailored air cavity adhered to a barometric pressure sensor. In this presentation, a finite element model is developed, which predicts the sensor response under operation. This experimentally validated model permits extensive trade studies of the geometries and material properties focused on the development of simple design rules for this sensor. With the simple design rules and finite element model, we design, manufacture, and test these new sensors specifically for a rotorcraft robotic landing gear.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EStevenson\u0026#39;s Presentation:\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis work presents an overview of the design, fabrication, and testing of a cold gas attitude control thruster for the BioSentinel interplanetary spacecraft. The spacecraft is a 6U cubesat that will spend 18 months in interplanetary space to observe the effects of the solar radiation environment on a living biological payload. The thruster will be used to detumble BioSentinel and provide reaction wheel unloading over the lifetime of the mission. The structure of the thruster is a single piece of 3D printed material, which encompasses the propellant tanks, feed pipes, nozzles, O-ring grooves, and structural mounting points. This provides many advantages over a traditional tank structure, including reduced manufacturing cost, reduced leak risk, and more efficient use of available volume. An engineering unit has been built, tested, and delivered to NASA Ames, and the flight unit will built in the spring of this year.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe AE Brown Bag is an AE School tradition in which select undergrad and grad students are invited to present their research before an audience that includes their mentors and peers. Lunch is provided. Intellectual turgor is required.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Select AE grads and undergrads present their research"}],"uid":"27836","created_gmt":"2017-02-02 23:17:30","changed_gmt":"2017-04-13 21:13:00","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-10T12:00:00-05:00","event_time_end":"2017-02-10T13:00:00-05:00","event_time_end_last":"2017-02-10T13:00:00-05:00","gmt_time_start":"2017-02-10 17:00:00","gmt_time_end":"2017-02-10 18:00:00","gmt_time_end_last":"2017-02-10 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587142":{"#nid":"587142","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Xiang Gao","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EDoctoral Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EXiang Gao\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Adviser: Prof. Wenting Sun)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2\u0026nbsp; p.m. \u0026nbsp;Thursday, Feb 23 --\u0026nbsp; Weber 200\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Active Combustion Control Using Ozone\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECombustion plays a vital role in transportation and power generation. However, concerns on efficiency, emission, and operations at extreme conditions drive combustion into its limits. One example is in high-speed air-breathing propulsion systems, such as supersonic combustion ramjet (scramjet) engines. The short flow residence times in the engine highlights the need to enhance and control ignition and flame stabilization. The relatively slow combustion process is generally attributed to the slow chemical reactions at low temperature conditions, such as radical production process. If the fuel oxidization pathway can be modified to circumvent these rate limiting processes, the ignition and combustion process could be dramatically accelerated. Following this idea, ozone (O\u003Csub\u003E3\u003C\/sub\u003E) injection is considered as a promising technique to enhance and control combustion. O\u003Csub\u003E3\u003C\/sub\u003E is one of the strongest oxidizer and can be easily produced by electric discharge. It decomposes at moderate temperature and releases reactive O atoms. Furthermore, explosive exothermic ozonolysis reactions (spontaneous reactions between O\u003Csub\u003E3\u003C\/sub\u003E and unsaturated hydrocarbons) can occur even at room temperature which may activate autoignition. However, its effect on combustion has never been investigated before.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn this work, the effects of O\u003Csub\u003E3\u003C\/sub\u003E addition on different combustion phenomena are systematically investigated, toserve as the basis for the proposed active combustion control technique using O\u003Csub\u003E3\u003C\/sub\u003E. Firstly, the effect of O\u003Csub\u003E3\u003C\/sub\u003E addition on laminar flame speeds (\u003Cem\u003ES\u003Csub\u003EL\u003C\/sub\u003E\u003C\/em\u003E) is investigated for premixed fuel\/oxidizer mixture. Increase of \u003Cem\u003ES\u003Csub\u003EL\u003C\/sub\u003E\u003C\/em\u003E due to O\u003Csub\u003E3\u003C\/sub\u003E addition is consistently observed for alkanes, CH\u003Csub\u003E4\u003C\/sub\u003E and C\u003Csub\u003E3\u003C\/sub\u003EH\u003Csub\u003E8\u003C\/sub\u003E, and this enhancement is more significant at elevated pressure. In contrast, both detrimental and beneficial effects due to O\u003Csub\u003E3\u003C\/sub\u003E addition are observed for the unsaturated hydrocarbon fuel, C\u003Csub\u003E2\u003C\/sub\u003EH\u003Csub\u003E4\u003C\/sub\u003E, depending on the experimental conditions. The effects of rapid exothermic ozonolysis reactions of unsaturated hydrocarbons on flame dynamics are further investigated using a non-premixed jet burner for C\u003Csub\u003E2\u003C\/sub\u003EH\u003Csub\u003E4\u003C\/sub\u003E. As O\u003Csub\u003E3\u003C\/sub\u003E is added in the oxidizer, autoignition occurs and several different flame stabilization mechanisms are observed subsequently. These include the conventional flame propagation, autoignition-assisted flame propagation and coexistence of multiple autoignition kernels. The autoignition-assisted propagation features a high propagation speed (approximately 30 times of laminar flame speed at corresponding condition). The coexistence of multiple autoignition kernels significantly accelerates the \u0026ldquo;propagation\u0026rdquo; of flames to a speed of approximately 100 times of \u003Cem\u003ES\u003Csub\u003EL\u003C\/sub\u003E\u003C\/em\u003E. In the next stage, more detailed diagnostics will be conducted and large-molecule fuels will be investigated as well.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Wenting Sun, AE, Dr. Jerry Seitzman, AE, Dr. Timothy Ombrello, AFRL\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u0026nbsp;\u003C\/h2\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cActive Combustion Control Using Ozone\u201d"}],"uid":"33975","created_gmt":"2017-02-08 16:54:11","changed_gmt":"2017-04-13 21:12:56","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-23T14:00:00-05:00","event_time_end":"2017-02-23T16:00:00-05:00","event_time_end_last":"2017-02-23T16:00:00-05:00","gmt_time_start":"2017-02-23 19:00:00","gmt_time_end":"2017-02-23 21:00:00","gmt_time_end_last":"2017-02-23 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587310":{"#nid":"587310","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Dhwanil Shukla","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDhwanil Shukla\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor, Prof. Narayanan Komerath)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E9:45 a.m.\u0026nbsp; Tuesday, Feb. 21st, 2017\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESkiles, Room 308\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Experimental study of Multi-rotor aerodynamic Interactions\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn recent years, unmanned VTOL vehicles have gained importance in various applications suited to their small size and relatively cheap construction. These include aerial videography, search and rescue missions, surveillance, construction, package\/food delivery etc. In such UAVs, the multi-rotor arrangement is preferred over conventional single rotor arrangements. The simpler control technique based on varying rotor speeds, bypasses the need for a swashplate mechanism. Small scale UAVs struggle in providing satisfactory performance such as payload, range, and endurance. This is mostly because of higher viscosity-dominated losses at low Reynolds number, and due to yet to be understood rotor-rotor and rotor-airframe aerodynamic interactions.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe focuses is on studying the viscous effects and flow interactions in various multi-rotor arrangements over a range of Reynolds number in hover and forward flight using flow visualization techniques such as high-speed stereo particle image velocimetry (high-speed SPIV), along with thrust, torque and power measurements for rotors. The knowledge acquired through the study will be instrumental in design and optimization of UAVs of possible configurations and scales, improving their performance.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Col\u003E\r\n\t\u003Cli\u003EDr. Narayanan Komerath, School of Aerospace Engineering (Advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Lakshmi Sankar, School of Aerospace Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Jonnalagadda Prasad, School of Aerospace Engineering\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. John McIntyre, Scheller College of Business\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Tom Thompson, US Army\u003C\/li\u003E\r\n\u003C\/ol\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cExperimental study of Multi-rotor aerodynamic Interactions\u201d"}],"uid":"33975","created_gmt":"2017-02-13 14:42:37","changed_gmt":"2017-04-13 21:12:53","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-21T09:45:00-05:00","event_time_end":"2017-02-21T09:45:00-05:00","event_time_end_last":"2017-02-21T09:45:00-05:00","gmt_time_start":"2017-02-21 14:45:00","gmt_time_end":"2017-02-21 14:45:00","gmt_time_end_last":"2017-02-21 14:45:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587314":{"#nid":"587314","#data":{"type":"event","title":"AE Presents: Dr. Danielle Wood - Advancing Tools, Teams and Technology to Enable Future Earth Observation Systems and Applications","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAdvancing Tools, Teams and Technology to Enable Future Earth Observation Systems and Applications\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Danielle R. Wood\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESpace Systems Engineer\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, March 1\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E3 p.m.\u0026nbsp; Guggenheim 442\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Danielle R. Wood, Space Systems Engineer will give a public lecture"}],"uid":"33975","created_gmt":"2017-02-13 15:01:05","changed_gmt":"2017-04-13 21:12:53","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-01T15:00:00-05:00","event_time_end":"2017-03-01T16:00:00-05:00","event_time_end_last":"2017-03-01T16:00:00-05:00","gmt_time_start":"2017-03-01 20:00:00","gmt_time_end":"2017-03-01 21:00:00","gmt_time_end_last":"2017-03-01 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587400":{"#nid":"587400","#data":{"type":"event","title":"AE Presents: Dr. Sili Deng - \u0022Towards High-Efficiency Low-Emission Combustion Design: Multimodal Combustion and Soot Emissions\u0022","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Sili Deng\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMechanical Engineering, Stanford University\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Towards High-Efficiency Low-Emission Combustion Design:\u0026nbsp; Multimodal Combustion and Soot Emissions\u0026quot; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday, February 21 @ 1:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EMontgomery Knight Room 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003ETransportation, power generation, and electricity generation depend heavily on the combustion of fossil and synthetic fuels.\u0026nbsp; The next generation of combustion systems will need to be more efficient with lower emissions than the current.\u0026nbsp; In this talk, I will discuss the coupling effects of two crucial components of combustion, chemical kinetics and fluid dynamics, on flame dynamics and soot emissions, and the physical insights for future combustion design.\u0026nbsp; Specifically, I will discuss 1) multimodal combustion that consists of both deflagration and autoignition under elevated temperatures and pressures and 2) soot evolution in turbulent reacting flows that represent the recirculating patterns in gas turbines.\u0026nbsp; I will conclude with future research directions that combine combustion and material sciences to develop new technologies for energy sustainability.\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EAbout Dr. Seng\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. Sili Deng is a postdoctoral scholar in Mechanical Engineering at Stanford University.\u0026nbsp; She received her bachelor\u0026rsquo;s degree in Thermal Engineering from Tsinghua University in 2010 and her master\u0026rsquo;s and doctoral degrees in Mechanical and Aerospace Engineering from Princeton University in 2012 and 2016, respectively.\u0026nbsp; Dr. Deng received the Princeton Energy and Climate Scholarship in 2013 and the Gordon Wu Prize for Excellence in 2014, both from Princeton University.\u0026nbsp; She was the only recipient from Princeton\u0026rsquo;s Engineering School of the Excellence in Teaching Award in 2014 and one of the five recipients of the Bernard Lewis Fellowship at the biennial International Symposium on Combustion in 2016.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Stanford University\u0027s Dr. Sili Deng will give a public lecture"}],"uid":"33975","created_gmt":"2017-02-14 15:19:51","changed_gmt":"2017-04-13 21:12:50","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-21T13:30:00-05:00","event_time_end":"2017-02-21T14:30:00-05:00","event_time_end_last":"2017-02-21T14:30:00-05:00","gmt_time_start":"2017-02-21 18:30:00","gmt_time_end":"2017-02-21 19:30:00","gmt_time_end_last":"2017-02-21 19:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587516":{"#nid":"587516","#data":{"type":"event","title":"Brown Bag Presents:  Hanif S. Hoseini and Johnny Worthy","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to the \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDaniel Guggenheim School of Aerospace Engineering\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBrown Bag Lunch\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Efeaturing research presentations by\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EHanif S. Hoseini\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor: Dr. Dewey Hodges\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Eand\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EJohnny Worthy\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Dr. Marcus Holzinger\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E_______________________________________________________________________\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EHanif S. Hoseini:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Aeroelastic Stability Analysis of Damaged HALE Aircraft Wings\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp; \u003C\/strong\u003ENonlinear aeroelastic analysis of damaged High-Altitude-Long-Endurance aircraft composite wings is considered. The structural model consists of full three-dimensional finite elements continuum model for the damaged area, which is a small localized area of the wing, and a geometrically exact one-dimensional displacement-based finite elements beam model for the undamaged part of the wing. The solid and the beam parts are then rigorously combined using a transformation between the joined nodes of the two models at their intersection. The transformation is derived using the recovery equations of variational asymptotic beam model and employed to eliminate the six degrees-of-freedom of the single joined node of the beam. The validity and efficiency of the method is demonstrated using test cases involving cracks and delaminations in the solid part. It is shown that although the accuracy remains virtually the same between the full three-dimensional model and the joined one-dimensional\/three-dimensional model, the computational cost is considerably lower for the latter. Finite-state induced flow theory of Peters is exploited as the unsteady aerodynamic model to compute aerodynamic forces and moments acting on the wing. Combining the structural and aerodynamic models, a dynamic nonlinear aeroelastic element is developed for the time simulation of the dynamic responses of composite high aspect-ratio wings. The model can be conveniently used for analyzing flutter characteristics and time responses to external excitations, as well as synthesizing passive and active flutter suppression control systems. Numerical results verifying the validity of the method are presented and the results are discussed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E_______________________________________________________________________\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EJohnny Worthy:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Dempster-Shafer Theory Applied to\u0026nbsp;Admissible Regions\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u0026nbsp; The admissible region approach is often used a bootstrap method to initialize a Bayesian state estimation scheme for too-short-arc measurements.\u0026nbsp;However, there are ambiguities in how prior probabilities are assigned for states in the admissible region.\u0026nbsp;Several approaches have proposed methods to assign prior probabilities, however there are inconsistencies in how the prior probabilities can be manipulated.\u0026nbsp;The application of Dempster-Shafer evidential reasoning theory to the admissible region problem can avoid these ambiguities by eliminating the need to make any assumptions on the prior probabilities. \u0026nbsp;Dempster-Shafer theory also enables the testing of the validity of the assumptions used to construct the admissible region.\u0026nbsp;This paper introduces Dempster-Shafer theory and formulates the admissible region in terms of plausibility and belief which reduce to traditional Bayesian probability once there is sufficient information in the system.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E______________________________________________________________________\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAbout the Brown Bag...\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EHeld every other Friday at noon while classes are in session, the Brown Bag Lunch is an AE tradition in which select graduate and undergraduate students present their research findings before an audience of their peers and mentors.\u0026nbsp; Lunch is provided.\u0026nbsp; If a research presentation is required for your program or major, talk to your advisor about signing up for a Brown Bag Lunch.\u0026nbsp; Approval must be obtained before you can be scheduled.\u0026nbsp; Scheduling is done through Michelle Hall.\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"An Ae tradition in which select undergrad and grad students present their research"}],"uid":"33975","created_gmt":"2017-02-16 14:43:42","changed_gmt":"2017-04-13 21:12:48","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-02-24T12:00:00-05:00","event_time_end":"2017-02-24T13:00:00-05:00","event_time_end_last":"2017-02-24T13:00:00-05:00","gmt_time_start":"2017-02-24 17:00:00","gmt_time_end":"2017-02-24 18:00:00","gmt_time_end_last":"2017-02-24 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587570":{"#nid":"587570","#data":{"type":"event","title":"Ph.D. Thesis Defense: Brian M. Wade","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBrian M. Wade\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; Dr. Daniel Schrage\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Framework for the Optimization of\u003C\/strong\u003E\u003Cstrong\u003E Doctrine and Systems in Army Air Defense Units Against a Complex Attack of Ballistic and Cruise Missiles Using Predictive Models of Stochastic Computer Simulations\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, March 16 @ 1:30 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EWeber Building CoVE\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProliferation of missile technology has increased in recent years.\u0026nbsp; Today, almost every military force in the world maintains an arsenal of Theater Ballistic Missiles (TBMs) and Cruise Missiles (CMs).\u0026nbsp; These technologies are less expensive to acquire and maintain than a conventional Air Force, but offer many of the same advantages, such as precision strike and deep shaping operations. This proliferation is advancing much faster than the Air Defensive Artillery (ADA) systems\u0026rsquo; capabilities since the cost of counter-missile systems is much greater than the ballistic or cruise missiles that they target.\u0026nbsp; Additionally, much of the ADA system\u0026rsquo;s tactics were developed on past battlefields with small and uniform raids made up of only a limited number of TBMs or CMs. Today, the ADA systems face raids including a large number of systems made of combinations of different types of TBMs and CMs.\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This thesis presents a new methodology that can be used to address large-scale complex raids made up of different types TBMs and CMs that attempt to overwhelm the ADA systems at a particular location.\u0026nbsp; This method will allow for technology gap identification, but the primary focus will be on how existing ADA systems can adjust their tactics in order to minimize the damage caused by threats that are not shot down and impact friendly forces.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Almost all the literature to date optimizes systems and tactics to reduce the number of leakers \u0026mdash; threats not shot down \u0026mdash; that impact the ground.\u0026nbsp; However, simply counting the number of leakers does not adequately describe the effects to friendly forces.\u0026nbsp; Instead, the first part of this thesis combines existing methods for external ballistics, concrete penetration, explosive cratering, and weapon blast and fragmentation damage in order to create an integrated program that can describe the damage to an airfield runway, infrastructure, and parked aircraft. The second part of the thesis focuses on modeling the ADA missile engagements.\u0026nbsp; Today\u0026rsquo;s high fidelity ADA modeling software is extremely accurate, but it runs relatively slow and produces a large amount of data.\u0026nbsp; This thesis uses an accredited Department of Defense ADA simulation model called the Extended Air Defense Simulation (EADSIM).\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Both the airfield damage model and ADA simulation have runtimes ranging from minutes to hours. They are also stochastic, so a large number of runs are required for each input vector in order to properly understand the output range.\u0026nbsp; In order to reduce the computation time to allow for later optimization, the methods of Design of Experiments and Machine Learning, such as Neural Networks and Gaussian Process Models, were used to create fast running models that predict the outputs of these simulations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The final part of the work uses these prediction algorithms to first optimize the enemy fire plan, then optimize the ADA defense tactics, and finally optimize the ADA defense tactics with a new interceptor missile system. Initially, the enemy attack plan must be optimized in order to discover combinations of the different types of TBMs and CMs that cause the most damage to different areas of the airfield.\u0026nbsp; This analysis produces a frontier of non-dominated solutions that maximize different effects such as damage to the runway, aircraft, or fuel.\u0026nbsp; Given this set of optimized fire plans, the friendly ADA tactics are optimized in order to minimize the damage to friendly assets for the lowest cost. A multi-attribute decision making tool is then used to select a specific set of tactics and these tactics are then compared to the based case.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Daniel Schrage - Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Dimitri Mavris\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Lakshmi Sankar\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Apinut \u0026quot;Nate\u0026quot; Sirirojvisuth\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Dave Knudson, Center for Army Analysis\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Framework for the Optimization of Doctrine and Systems in Army Air Defense Units Against a Complex Attack of Ballistic and Cruise Missiles Using Predictive Models of Stochastic Computer Simulations\u201d"}],"uid":"33975","created_gmt":"2017-02-17 15:55:43","changed_gmt":"2017-04-13 21:12:47","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-16T14:30:00-04:00","event_time_end":"2017-03-16T16:30:00-04:00","event_time_end_last":"2017-03-16T16:30:00-04:00","gmt_time_start":"2017-03-16 18:30:00","gmt_time_end":"2017-03-16 20:30:00","gmt_time_end_last":"2017-03-16 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"587839":{"#nid":"587839","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Yu-Hung Chang","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EYu-Hung Chang\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Prof. Vigor Yang)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Spatiotemporal Flow Dynamics Prediction by Using Data-Driven Design Method and Machine Learning\u0026rdquo; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, March 3\u003Csup\u003Erd\u003C\/sup\u003E @ 3:00 p.m.\u003Cbr \/\u003E\r\nGuggenheim\u0026nbsp;Building Room\u0026nbsp;442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis is an interdisciplinary work combining machine-learning techniques, statistics, and flow physics. The main purpose and prime contribution of this work are to demonstrate a paradigm of design strategy for new generation engineering via using a swirling injector as example. To develop a robust combustion system efficiently, understanding of underlying physics, coupling and conflicting of the design parameters, and data-driven analysis is significantly important to achieve an efficient design process with the optimal response. Large eddy simulation (LES) has been generally used to simulate flow physics and combustion characteristics inside rocket engines for decades; however, this technique consumes great amount of time and resources, which is impractical to apply for complex design studies. This thesis proposes a design strategy that can conduct a robust design exploration and build a highly efficient model to predict spatiotemporal flowfield with detailed mechanisms of a new design. The whole strategy connects flow physics, statistics, big data analysis, and machine learning.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe applications of Kernel-smoothed Proper Orthogonal Decomposition (KSPOD), Robust PCA (RPCA), and multi-class classification with convolutional neural network (CNN) for spatiotemporal flow mechanism prediction are proposed in this these. The primary results with application of KSPOD, which is trained by high-fidelity simulation datasets, have successfully predicted the instantaneous flow dynamics of a swirl injector by utilizing Kriging based weighting function from design matrix through design of experiment. The implemented machine learning concept enhances the model\u0026rsquo;s natural applicability in emulation provides an improvement over traditional POD. This model performs well for the analytical estimation of the performance measures such as liquid film thickness and spreading angle. Furthermore, POD and power spectrum densities from POD coefficients from prediction are alike to those from simulation. At the same time, the elapsed computation time for evaluating new design points is reduced significantly compared with other algorithms. The prediction is over 3,000 times faster than simulation.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe future work will focus on the applications of RPCA and multi-class classification with CNN in flow physics to enhance the accuracy of prediction model and design process. To further improve the design strategy with highly efficient emulation method, an enhanced data decomposition method is required. RPCA, an unsupervised learning process, is a\u0026nbsp;modification of POD that works well with respect to\u0026nbsp;grossly\u0026nbsp;corrupted observations.\u0026nbsp;Therefore, mathematically RPCA should work better than POD with turbulence simulation dataset. Multi-class classification with neural network will be used for deeper unsupervised learning with flow structure identification, which can further improve the prediction model providing response with better accuracy. This thesis will eventually conduct machine-learning concepts to probe into flow physics, speed up the design process, and improve the flowfield prediction accuracy.\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Vigor Yang (Advisor)\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EDr. Lakshmi N Sankar\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\n\u003Cem\u003EGeorgia Institute of Technology\u003C\/em\u003E\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n\r\n\u003Cp\u003EDr. C. F. 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Baur is responsible for all aspects relating to acquisition and disposition of all owned and leased aircraaft as well as for developing and managing United\u0026#39;s fleet plan. Prior to this position, Baur served as staff vice president of fleet planning and management for Continental Airlines. Baur began his career at Continental in 1990 and has held various positins with increasing responsiblity in engineering, finance, and fleet.\u0026nbsp; Baur earned his undergraduate degree in aerospace engineering from Georgia Tech and an MBA in finance from California State University. He is married and has two children\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EGregory Hamilton\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003EGregory Hamilton is President of Aviation Week, a Penton Business. He is responsible for the overall strategy and direction for Aviation Week\u0026rsquo;s network of digital, event, print and data\/analytics services covering all aspects of aviation, aerospace and defense in 180 countries. Hamilton has been with Aviation Week for 27 years at both Penton and McGraw-Hill and has held leadership positions in all facets of information and media, including editorial, business development, marketing services, communications and new product development. Prior to this role, Hamilton served as Publisher, Strategic Media at Aviation Week, where he launched the group\u0026rsquo;s events business and expanded it globally. He also launched Aviation Week\u0026rsquo;s video and television services and expanded the group\u0026rsquo;s portfolio across the civil and government aerospace and defense industries, having served as Publisher of Defense Technology International and Show News and Co-Publisher of local-language media, including International Aviation (China) and Air Transport Observer (Russia\/CIS).\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EGraham Warwick\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003EGraham Warwick leads \u003Cem\u003EAviation Week\u0026#39;s\u003C\/em\u003E coverage of technology, focusing on engineering and technology across the aerospace industry, with a special focus on identifying technologies of strategic importance to aviation, aerospace and defense.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBorn and educated in Scotland, he graduated in aeronautical engineering and worked in advanced design at Hawker Siddeley Aviation in the U.K. before becoming an aerospace journalist. Before joining \u003Cem\u003EAviation Week\u003C\/em\u003E in April 2008, he spent almost 30 years with weekly aerospace news magazine \u003Cem\u003EFlight Internationa\u003C\/em\u003El, most recently as Americas editor based in the U.S.\u0026nbsp; Graham is a winner of the Decade of Excellence award for aviation journalism, and is a Fellow of the Royal Aeronautical Society. In 2013 he and colleague Guy Norris received the Jesse H. Neal award for Best Technical Content for their advanced propulsion feature.\u003C\/p\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJoin AIAA and The Wings Club for a panel discussion on careers in aerospace and defense. Free subscription to Aviation Week Space \u0026amp; Technology to all attendees. 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Pate","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003Cbr \/\u003E\r\nby\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDavid J. Pate\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Brian J. German)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E10:00 a.m., Friday, March 10\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EWeber Building: \u003C\/em\u003E\u0026nbsp;\u003Cem\u003ECollaborative Visualization Environment (CoVE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EA Surface Vorticity Method for Wake-Body Interactions\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe objective of this dissertation research is to develop a surface vorticity method for simulating high Reynolds number incompressible aerodynamic flows with strong unsteady interactions between wakes and lifting bodies. Examples of these types of flows include rotors in hover, propeller\/wing installations, and impingement of vortex cores shed from wing strakes or flaps on downstream surfaces. Although higher-order panel codes provide good representation of potential flow around lifting bodies, their treatment of wakes is inadequate for our purpose. In the absence of significant boundary layer separation, the vorticity in these flows concentrates into thin shear layers. Therefore, vortex sheets are a natural mathematical representation of these flows.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe leverage and extend rigorous methods from the vortex methods literature to model a wake as a free vortex sheet discretized as a triangulation of panels with linearly varying surface vorticity. The vorticity evolution equation is solved approximately by maintaining constant circulation along each half-edge in the triangulation, an approach that generalizes current methods for constant-strength elements. The vortex sheet is regularized with a smoothing parameter which provides an apparent thickness that mimics the limited viscous mixing in high Reynolds number flow. An adaptive paneling algorithm is implemented to maintain the desired level of detail as the wake triangulation stretches and deforms. The induced velocities from the wake vortex sheet are computed with a treecode implemented on a graphics processing unit (GPU) to allow computations with millions of panels.Lifting bodies are modeled with bound vortex sheets that are also triangulated with linear strength panels.\u0026nbsp; These higher-order vorticity elements provide accurate velocity predictions on and near the surface, allowing for high resolution streamline tracing. Surface vorticity is determined by enforcing flow tangency constraints at each triangle centroid, zero circulation around each panel perimeter, and the unsteady pressure matching Kutta condition. These constraints result in an overdetermined system that is solved in a least squares formulation. Thus, our method is a surface vorticity boundary element method that combines both solid bodies and wakes in a rigorous and consistent manner.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe results of the method are shown to compare favorably to wind tunnel experimental results, including wake profiles, for a rectangular wing in a steady freestream. Finally, we demonstrate the capabilities of our method in the context of strong wake-body interactions by simulating two flying wing aircraft in close formation, with the wake from the leading aircraft impacting the tailing aircraft.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProf. Brian German (advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Lakshmi Sankar (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Marilyn Smith (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Graeme Kennedy (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Erik Olson (NASA Langley)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EDoctoral student David J. 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Mavris)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Formulation of an Uncertainty Based Methodology for Advanced Technology Performance Prediction\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, March 9, 2017 @ 11:00 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EWeber Space Science and Technology Building (SST-II)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003ECollaborative Design Environment (CoDE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EChallenges within the aviation industry stem from interdependencies between environmental goals that require engineers to make trade-offs between them. When faced with multi-objective problems like these, engineers and decision makers need the ability to rapidly understand how making changes to one variable affects all the objectives simultaneously. A key enabler in the development of a credible performance estimation tool that can be used to parametrically explore large areas of the design space. To ensure the credibility of the tool, it must include a traceable and transparent prediction of the uncertainty throughout the space. This will enable engineers and decision makers to parametrically explore the design space while giving them an understanding of the confidence level of the prediction. Additionally, by including the level of uncertainty throughout the design space, decision makers can apply additional resources for experimentation more efficiently by applying them where there is a high level of uncertainty.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The creation of a modeling environment for an advanced concept is challenging because a lot of data is needed. Unfortunately, it is difficult to obtain this data for advanced concepts. High order computational models or physical experiments are used sparingly in the early phases of design. In contrast, lower order methods are fast and inexpensive, but they lack credibility. One way of decreasing the computational effort and time associated with high fidelity simulations is to use multifidelity methods which utilize information from disparate sources of data at multiple fidelity levels. Low fidelity methods are run throughout large areas of the design space and then augmented with sparse high fidelity data to create a more accurate model. Therefore, the research objective for this thesis is to develop a methodology to characterize the uncertainty throughout the design space based on the relative location of the desired design to the high fidelity designs when given resulting uncertainty distributions from multiple data sources.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Bayesian model averaging is a common multifidelity method used to synthesize probabilistic data sets. However, Bayesian model averaging does not work well with sparse data sets because a correction surrogate and a likelihood surrogate need to be generated which requires large amounts of high fidelity data. The method presented in this research utilizes a unique proximity based biasing process to combine the data sets that does not require two separate surrogates to be generated. A Monte Carlo method is then used to propagate the uncertainty throughout the entire design space.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Comparisons are made between the method presented in this research and Bayesian model averaging for the prediction of the lift coefficient of a wing section. The results show that the level of inferred uncertainty from the Bayesian model averaging method is approximately 20% more than the method developed by this research.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAdditionally, the method developed by this research is applied to the performance of Hamilton Standard propellers to demonstrate the method on a representative real world problem.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Dimitri N. Mavris\u0026nbsp;(Advisor)\u003Cbr \/\u003E\r\nProf.\u0026nbsp;Lakshmi N. Sankar\u003Cbr \/\u003E\r\nProf. Daniel P. Schrage\u003Cbr \/\u003E\r\nDr.\u0026nbsp;Jimmy Tai\u003Cbr \/\u003E\r\nDr. Jeff Schutte\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cFormulation of an Uncertainty Based Methodology for Advanced Technology Performance Prediction\u201d"}],"uid":"33975","created_gmt":"2017-03-08 14:02:30","changed_gmt":"2017-04-13 21:12:27","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-09T11:00:00-05:00","event_time_end":"2017-03-09T13:00:00-05:00","event_time_end_last":"2017-03-09T13:00:00-05:00","gmt_time_start":"2017-03-09 16:00:00","gmt_time_end":"2017-03-09 18:00:00","gmt_time_end_last":"2017-03-09 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"588478":{"#nid":"588478","#data":{"type":"event","title":"Career Talk: The Society of Satellite Professionals International","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to a \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ECareer Talk: Satellite Communications\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Epresented by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003EMr. Michael Greenwood\u003Cbr \/\u003E\r\nPresident of the Society of Satellite Professionals International (SSPI)\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EThere will be industry professionals from \u003C\/em\u003E\u003C\/strong\u003E \u003Cstrong\u003EC\u003Cem\u003Erystal, DigitalGlue, Ericsson, Intelsat, and Rittan at \u003C\/em\u003E\u003C\/strong\u003E\u003Cem\u003E\u003Cstrong\u003Ethis event, so bring your resume, your questions, and your ambition. \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003ERefreshments provided.\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch4\u003E\u003Cstrong\u003ESponsored by the School of Aerospace Engineering Student Advisory Council (SAESAC)\u003C\/strong\u003E\u003C\/h4\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe School of Aerospace Engineering Student Advisory Council will host a career talk featuring Michael Greenwood, the president of the Society of Satellite Professionals, International. Bring your resume, your questions, and your ambitions. There will be reps from \u003Cstrong\u003E Crystal, DigitalGlue, Ericsson, Intelsat\u003C\/strong\u003E and\u003Cstrong\u003E Rittan\u003C\/strong\u003E at this event!\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Any student interested in flying where the birds only dream of going - you are welcome at this event"}],"uid":"27836","created_gmt":"2017-03-08 22:11:04","changed_gmt":"2017-04-13 21:12:27","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-15T17:30:00-04:00","event_time_end":"2017-03-15T19:00:00-04:00","event_time_end_last":"2017-03-15T19:00:00-04:00","gmt_time_start":"2017-03-15 21:30:00","gmt_time_end":"2017-03-15 23:00:00","gmt_time_end_last":"2017-03-15 23:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"related_links":[{"url":"http:\/\/www.sspi.org\/cpages\/about-sspi","title":"The Society of Satellite Professionals International"},{"url":"http:\/\/www.saesac.gatech.edu\/about","title":"The School of Aerospace Engineering Student Advisory Council "}],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"10377","name":"Career\/Professional development"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"588625":{"#nid":"588625","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Kevin Jacobson","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EKevin Jacobson\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisors: Dr. Marilyn Smith and Dr. Graeme Kennedy)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Adjoint-based Error Estimation and Adaptation of High Fidelity Aeroelastic Analysis\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, March 17 @ 1:00 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EBill Moore Student Success Center Room 292\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAn adjoint-enabled aeroelastic solver that couples CFD and a full structural FEM has been developed for this thesis. The adjoint solution will be utilized to form estimations of discretization error in aeroelastic solutions. The adjoint solution will be also used as a basis for an adaptation metric. While feature-based adaptation attempts to better resolve regions of error, adjoint-based adaptation targets the source of the discretization error. By focusing on the source of error, adjoint-based metrics lead to more efficient and effective adaptation. When used in combination with the adjoint-based error estimation, adjoint-based adaptation can be applied repeatedly until the final result is reduced to be within a specified error tolerance. This process of adjoint-based error estimation and adaptation has been applied in CFD and FEM models separately, but this will be the first application in an aeroelastic setting.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBio:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EKevin Jacobson completed his Bachelor of Science in Mechanical Engineering degree at Georgia Tech in Spring of 2013. In the Fall of 2013, he joined Dr. Marilyn Smith\u0026rsquo;s Nonlinear Computational Aeroelasticity Lab where he\u0026rsquo;s worked on projects including numerical experiments to study the physics of dynamic stall, reverse flow, and hub aerodynamics; development of aeroelastic coupling interfaces for rotorcraft and wind turbine applications; and hybrid CFD-free-wake models for rotorcraft analysis. In January of 2015, he began working under the co-advisement of Dr. Graeme Kennedy developing an adjoint-enabled framework for aeroelastic design optimization of aircraft.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EKevin has been an author on 6 conference papers: 2 AIAA SciTech papers, and one at each of the AHS forum, AHS Aeromechanics Specialists Conference, the European Rotorcraft Forum, and Rotorcraft Virtual Engineering Conference. He is an author on two journal papers: one accepted in the AIAA Journal and one under review for the Aeronautical Journal.\u0026nbsp; He was the team leader for Georgia Tech\u0026rsquo;s graduate team for the 2016 AHS Student Design Competition which placed second. He is also the winner of the 2015 AHS Southern Region Robert L. Lichten Award.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Marilyn Smith, Georgia Tech, School of Aerospace Engineering\u003Cbr \/\u003E\r\nDr. Graeme Kennedy, Georgia Tech, School of Aerospace Engineering\u003Cbr \/\u003E\r\nDr. Stephen Ruffin, Georgia Tech, School of Aerospace Engineering\u003Cbr \/\u003E\r\nDr. Brian German, Georgia Tech, School of Aerospace Engineering\u003Cbr \/\u003E\r\nDr. Steven Massey, NASA Langley, Computational Aeroelasticity Branch\u003Cbr \/\u003E\r\nDr. William Jones, NASA Langley, Computational Aerosciences Branch\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cAdjoint-based Error Estimation and Adaptation of High Fidelity Aeroelastic Analysis\u201d"}],"uid":"33975","created_gmt":"2017-03-13 14:58:42","changed_gmt":"2017-04-13 21:12:24","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-17T14:00:00-04:00","event_time_end":"2017-03-17T15:00:00-04:00","event_time_end_last":"2017-03-17T15:00:00-04:00","gmt_time_start":"2017-03-17 18:00:00","gmt_time_end":"2017-03-17 19:00:00","gmt_time_end_last":"2017-03-17 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"588738":{"#nid":"588738","#data":{"type":"event","title":"Ph.D. Thesis Defense: Brandon J. Johnson","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EBrandon J. Johnson\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Dimitri N. Mavris)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, March 27, 2017 @ 12:00 p.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EWeber Space Science and Technology Building (SST-II)\u003C\/em\u003E\u003Cbr \/\u003E\r\n\u003Cem\u003ECollaborative Visualization Environment (CoVE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;An Uncertainty Quantification and Management Methodology to Support Rework Decisions in Multifidelity Aeroelastic Load Cycles\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECost overruns and schedule delays have plagued almost all major aerospace development programs and have resulted in billions of dollars lost. Design rework has contributed to these problems and one approach to mitigating this risk is reducing uncertainty. Failure during flight test results is one of the most significant and costly rework efforts. The main purpose of this thesis is to reduce the risk of this rework by improving the loads analysis process. The main objective of loads analysis is to determine the worst-case loading conditions to design the structure. Observing the current approach has revealed some shortcomings related to uncertainty and the allocation of load and structural margins. Uncertainty quantification and management were chosen to address these limitations and a framework is proposed to support decisions for rework in loads analysis.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EKey aspects of the framework include utilizing a Bayesian network for modeling the loads process as well as propagating various uncertainty sources. Bayesian-based resource allocation optimization is used to reduce and manage uncertainty. Finally, the goal of the framework is to determine the optimal tradeoffs between aerodynamic fidelity and margin allocation to minimize the risk of rework while considering their respective costs within a finite budget. Assigning costs related to fidelity and margins are intended to reflect the users\u0026rsquo; prioritization of uncertainty, computational cost and performance degradation through weight penalties.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFive experiments were conducted related to epistemic uncertainty quantification, sensitivity analysis, developing the uncertainty management system and finally experiments to improve and evaluate the framework against the current approach. The contributions of this thesis include; an integrated modeling and simulation environment for the load analysis process, uniquely applying a Bayesian network for efficient uncertainty modeling and propagation, and a viable cost-based uncertainty management system for loads analysis among others.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nProf. Dimitri Mavris\u003Cbr \/\u003E\r\nProf. Stephen Ruffin\u003Cbr \/\u003E\r\nProf. Daniel Schrage\u003Cbr \/\u003E\r\nDr. Frode Engelsen\u003Cbr \/\u003E\r\nDr. Neil Weston\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022An Uncertainty Quantification and Management Methodology to Support Rework Decisions in Multifidelity Aeroelastic Load Cycles\u0022"}],"uid":"33975","created_gmt":"2017-03-14 18:29:57","changed_gmt":"2017-04-13 21:12:23","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-27T13:00:00-04:00","event_time_end":"2017-03-27T15:00:00-04:00","event_time_end_last":"2017-03-27T15:00:00-04:00","gmt_time_start":"2017-03-27 17:00:00","gmt_time_end":"2017-03-27 19:00:00","gmt_time_end_last":"2017-03-27 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"588800":{"#nid":"588800","#data":{"type":"event","title":"Ph.D. Thesis Defense: Pierre Valdez","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EPierre Valdez\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Dimitri N. Mavris)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EThursday, March 23, 2017 @ 9:00 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EWeber Space Science and Technology Building (SST-II)\u003Cbr \/\u003E\r\nCollaborative Visualization Environment (CoVE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;A Methodology for the Optimization of Robust Unmanned Vehicle Communications in Maritime Environments\u0026rdquo;\u003C\/strong\u003E\u003Cem\u003E\u0026nbsp;\u003C\/em\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAs the military moves towards using more unmanned vehicles in the operational environment, accounting for communications during the mission planning phases is critical to meet the mission objectives. The quality of radio frequency (RF) and acoustic communications in maritime environments are highly dependent on the environmental conditions. Maritime atmospheric and underwater environments provide a complex medium for RF and acoustic communications that need to be accounted for to meet the robust and reliable communication requirements for unmanned vehicles.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This thesis proposes a methodology for predicting the\u0026nbsp;communications network between unmanned vehicles using the Advanced Propagation Model to model the physics of RF electromagnetic wave propagation and probabilistic approaches to make the transmission channel robust to environmental conditions. In particular, a Nakagami-m transmission channel model is suggested for its ability to model a wide range of fluctuation intensities caused by environmental conditions. The stability of the network is assessed\u0026nbsp;using the Finite State Markov Channel model through the use of\u0026nbsp;state transition probabilities that lead to unstable transmission channel states. Network topologies composed of state-of-the-art unmanned vehicles with enhanced communications-based course of actions (COAs)\u0026nbsp;to relay communications and guarantee connectivity and reliability are investigated. The methodology follows the Navy Planning Process closely to provide\u0026nbsp;COAs and schedules that lead to optimal communication measures of performance of the mission.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The proposed methodology is demonstrated using the mine survey mission scenario. Results show the benefit of the proposed methodology over conventional approaches to survey target areas in a sea-base operational environment. The methodology is not a final product, but will be upgraded and integrated into the UV-Core environment to provide valuable information during mission planning phases to make crucial decisions and trade-offs.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Dimitri Mavris (Advisor)\u003Cbr \/\u003E\r\nProf. Eric Feron (AE)\u003Cbr \/\u003E\r\nProf. Daniel P. Schrage (AE)\u003Cbr \/\u003E\r\nDr. Kelly Griendling (AE)\u003Cbr \/\u003E\r\nDr. Ayodeji Coker (Space and Naval Warfare Systems SPAWAR, San Diego CA)\u003Cbr \/\u003E\r\nDr. Matthew Bays (Naval Surface Warfare Center, Panama City FL)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cA Methodology for the Optimization of Robust Unmanned Vehicle Communications in Maritime Environments\u201d "}],"uid":"33975","created_gmt":"2017-03-15 15:20:34","changed_gmt":"2017-04-13 21:12:23","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-23T10:00:00-04:00","event_time_end":"2017-03-23T12:00:00-04:00","event_time_end_last":"2017-03-23T12:00:00-04:00","gmt_time_start":"2017-03-23 14:00:00","gmt_time_end":"2017-03-23 16:00:00","gmt_time_end_last":"2017-03-23 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"588947":{"#nid":"588947","#data":{"type":"event","title":"AE Presents: DARPA Program Manager Dr. Ashish Bagai","body":[{"value":"\u003Ch3\u003EYou are invited to hear\u003C\/h3\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;In Pursuit of a Vision: Defining the Future of Vertical Flight\u0026quot; \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch3\u003Ea talk by\u003C\/h3\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDr. Ashish Bagai\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDARPA Program Manager\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EApril 21, 3:15-4:15 p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EGuggenheim 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nDr. Bagai\u0026#39;s seminar will summarize DARPA\u0026#39;s contribution to advancing vertical flight technologies, and the position of my programs in this space. It will specifically contextualize the VTOL X-Plane program that I developed, along with a historical frame work that demonstrates capability gaps in vertical flight. Data from contemporary helicopters and historical experimental aircraft are used to identify trends in performance (flight speeds and efficiencies), and identify opportunity spaces that were used to design the VTOL X-Plane program. Justification for the program objectives and conceptual approach that was developed will be discussed, along with a top level description of the competitive program execution plan. An overview of the selected hybrid-electric XV-24A aircraft will be presented, along with a summary of key technologies that will be matured for future application. Additionally, details of a sub-scale demonstrator aircraft will be provided, along with a discussion on the flight test effort. The presentation will serve to exemplify the vast and emerging opportunities enabled by the program in advancing the sate of the art. Finally, a discussion of areas of research opportunities, will be presented.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBio:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nAshish is a Program Manager with the Tactical Technology Office at the Defense Advanced Research Projects Agency. He has been managing the development of novel vertical flight technologies and systems, most notably the ARES modular, reconfigurable air vehicle and the XV-24A hybrid-electric VTOL X-Plane \u0026mdash; concepts that are to be demonstrated in flight at full scale. Prior to joining DARPA, Ashish spent several years at Sikorsky Aircraft, mostly as an aerodynamicist and technical lead for rotor systems design, and before that at Boeing. He is a graduate of the University of Maryland. \u0026quot;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022In Pursuit of a Vision: Defining the Future of Vertical Flight\u0022"}],"uid":"33975","created_gmt":"2017-03-17 16:47:20","changed_gmt":"2017-04-13 21:12:22","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-21T16:15:00-04:00","event_time_end":"2017-04-21T17:15:00-04:00","event_time_end_last":"2017-04-21T17:15:00-04:00","gmt_time_start":"2017-04-21 20:15:00","gmt_time_end":"2017-04-21 21:15:00","gmt_time_end_last":"2017-04-21 21:15:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589008":{"#nid":"589008","#data":{"type":"event","title":"Ph.D. Thesis Proposal: Giada Abate","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EGiada Abate\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Dimitri N. Mavris)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Design Rules for the Application of Tubercles on the Leading Edge of a Wind Turbine Blade\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, March 27, 2017 @ \u003C\/strong\u003E \u003Cstrong\u003E9:00 A.M.\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EWeber Space Science and Technology Building (SST-II)\u003Cbr \/\u003E\r\nCollaborative Visualization Environment (CoVE)\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EComplicated environmental effects such as atmospheric turbulence, ground boundary layer, variation of free-stream wind direction and amplitude, affect wind turbine performance. Since the main goal of a wind turbine is the production of energy, the irregular nature of the wind is considered the main problem to obtain a constant power output. Variability in the power production happens under off-design conditions (e.g. high wind speed), when the blade can be partially or totally in stall; sinusoidal modifications (tubercles) of the wind turbine blade leading edge could be a solution to this problem. Previous research demonstrated that leading edge tubercles delay flow separation and improve the aerodynamic performance in the post-stall regime. The advantages of tubercle application were discovered studying the Humpback Whale swimming behavior; the great agility of this big animal in capturing preys is due to the presence of tubercles on the leading edge of its flippers. Multiple research tried to understand the physical phenomenon behind those leading edge bumps, comparing them to vortex generators: tubercles produce counter-rotating vortices, which delay the separation of the flow due to a re-energization of the boundary layer over the surface.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe proposed research wants to analyze the performance enhancements of the NREL Phase VI wind turbine blade with tubercles on the leading edge, and in particular, it wants to identify design rules for tubercle application such that best performance and highest power produced can be achieved.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThree-dimensional Computational Fluid Dynamics (CFD) simulations of the NREL Phase VI wind turbine blade with different tubercle configurations will be run to analyze the influence on the performance of amplitude and wavelength of tubercles and their location along the blade span. A data analysis strategy will be used to identify the design rules, and then an optimization process will be conducted to find the best tubercle configuration, which permits to achieve the highest performance in terms of annual energy production of the NREL Phase VI wind turbine.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Dimitri N. Mavris (Advisor)\u003Cbr \/\u003E\r\nProf. Brian German (AE)\u003Cbr \/\u003E\r\nProf. Lakshmi Sankar (AE)\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cDesign Rules for the Application of Tubercles on the Leading Edge of a Wind Turbine Blade\u201d"}],"uid":"33975","created_gmt":"2017-03-20 17:44:32","changed_gmt":"2017-04-13 21:12:20","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-27T10:00:00-04:00","event_time_end":"2017-03-27T12:00:00-04:00","event_time_end_last":"2017-03-27T12:00:00-04:00","gmt_time_start":"2017-03-27 14:00:00","gmt_time_end":"2017-03-27 16:00:00","gmt_time_end_last":"2017-03-27 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589180":{"#nid":"589180","#data":{"type":"event","title":"Doctoral Defense: Marc Canellas","body":[{"value":"\u003Ch3\u003E\u003Cstrong\u003EPh.D. Thesis Defense\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003Eby\u003C\/p\u003E\r\n\r\n\u003Ch1\u003EMarc Canellas\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Prof. Karen Feigh)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E10 a.m. Wednesday, April 5\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003EWilby Room \u0026mdash; Ground Floor West, Georgia Tech Library\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDecision-Making with Incomplete Information\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDecision makers are continuously required to make choices in environments with incomplete information. This dissertation sought to understand and, ultimately, support the wide range of decision making strategies used in environments with incomplete information. The results showed that the standard measure of incomplete information as total information, is insufficient for understanding and supporting decision makers faced with incomplete information. The distribution of information was shown to often be a more important determinant of decision making performance. Two new measures of the distribution of incomplete information were introduced (option imbalance and cue balance) and tested across three computer simulations of 18 variations of decision making strategies within hundreds of environments and millions of decision tasks with incomplete information, and one human-subjects study.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe simulations were powered by a new general linear model of decision making which can efficiently and transparently model a wide range of strategies beyond the traditional set in the literature. Of the many potential mediators of the relationship between the distributions of incomplete information and performance, only the strategies\u0026#39; estimates of missing information were significant in the computational studies. Accurate estimates resulted in total information being the only meaningful determinant of accuracy while inaccurate estimates resulted in low option imbalance and high cue balance causing high accuracy.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe simulation results were partially contradicted by a study in which human decision makers with accurate estimates were affected by option imbalance and cue balance in the same manner as inaccurate estimates \u0026ndash; suggesting that some distributions might simply be difficult regardless of the estimates. These results argued that decision support should modify the presentation of information away from difficult distributions. These arguments were codified as heuristic information acquisition and restriction rules which, when tested, increased accuracy without probability and cue weight information.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EProf. Karen Feigh (Advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Brian German (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Amy Pritchett (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Steve Cross (ISYE)\u003C\/li\u003E\r\n\t\u003Cli\u003EProf. Juan Rogers (PUBP)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":" Decision-Making with Incomplete Information"}],"uid":"27836","created_gmt":"2017-03-23 16:37:11","changed_gmt":"2017-04-13 21:12:18","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-05T11:00:00-04:00","event_time_end":"2017-04-05T12:00:00-04:00","event_time_end_last":"2017-04-05T12:00:00-04:00","gmt_time_start":"2017-04-05 15:00:00","gmt_time_end":"2017-04-05 16:00:00","gmt_time_end_last":"2017-04-05 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589185":{"#nid":"589185","#data":{"type":"event","title":"Doctoral Defense: Luke Humphrey","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EYou are invited to a\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDoctoral Defense\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cem\u003Eby\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003ELuke Humphrey\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EEnsemble-averaged Dynamics of Premixed, \u003C\/strong\u003E\u003Cstrong\u003ETurbulent, Harmonically Excited Flames\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMontgomery Knight 317\u003Cbr \/\u003E\r\nWednesday, March 29, 12 noon\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELow NOx, lean premixed combustion systems are more prone to combustion instability, which can significantly constrain system operability and increase maintenance expenses. Combustion instability occurs due to a feedback loop between the heat release rate and system acoustics and \/ or hydrodynamic instabilities. Because typical high power combustion systems also operate in a turbulent regime, prediction of combustion instability requires understanding the interaction of coherent and turbulent flame disturbances. Therefore, this thesis concentrates on understanding and modeling these interactions. Two primary avenues of research are pursued: development and validation of a flame position and heat release model and experimental investigations of the ensemble-averaged flame. The turbulent modeling method is based on the G-equation approach used in laminar flame position and heat release studies. The dependence of the ensemble-averaged turbulent flame speed on the ensemble-averaged flame curvature is incorporated using a flame speed closure proposed by Shin and Lieuwen (2013). This reduced order turbulent modeling approach is validated by comparison with three-dimensional simulations of premixed flames. Second, the development of and results from a novel experimental facility are described. This facility has the capability to subject premixed flames to simultaneous broadband turbulent fluctuations and narrowband coherent fluctuations, which are introduced on the flame using an oscillating flame holder. Mie scattering images are used to identify the instantaneous flame edge position, while simultaneous high speed PIV measurements provide flow field information. Results from this experimental investigation include analysis of the ensemble-averaged flame dynamics, the ensemble-averaged turbulent displacement and consumption speeds, and the dependence of both the displacement speed and consumption speed on the ensemble-averaged flame curvature. Together, the results indicate potential in using this approach for modeling the ensemble-averaged flame position and heat release.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECommittee:\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003EDr. Tim Lieuwen (Adviser)\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Jerry Seitzman\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Devesh Ranjan\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Lakshmi Sankar\u003C\/li\u003E\r\n\t\u003Cli\u003EDr. Wenting Sun\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Ensemble-averaged Dynamics of Premixed,  Turbulent, Harmonically Excited Flames"}],"uid":"27836","created_gmt":"2017-03-23 17:19:58","changed_gmt":"2017-04-13 21:12:18","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-29T13:00:00-04:00","event_time_end":"2017-03-29T15:00:00-04:00","event_time_end_last":"2017-03-29T15:00:00-04:00","gmt_time_start":"2017-03-29 17:00:00","gmt_time_end":"2017-03-29 19:00:00","gmt_time_end_last":"2017-03-29 19:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589197":{"#nid":"589197","#data":{"type":"event","title":"Ph.D. Proposal: Ioannis Exarchos","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003EPh.D. Thesis Proposal \u003C\/em\u003E\u003C\/strong\u003E\u003Cem\u003Eby\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EIoannis Exarchos\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E(Advisor: Prof. Panagiotis Tsiotras)\u003Cbr \/\u003E\r\n\u003Cstrong\u003E2 p.m., Wednesday, March 29\u003Cbr \/\u003E\r\nWeber Building, Room 200\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EStochastic Optimal Control \u0026ndash; An Fbsde Sampling Approach\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003EABSTRACT:\u003Cbr \/\u003E\r\nStochastic optimal control lies within the foundation of mathematical control theory ever since its inception. Its usefulness has been proven in a plethora of engineering applications, such as autonomous systems, robotics, neuroscience, and financial engineering, among others. Specifically, in robotics and autonomous systems, stochastic control has become one of the most successful approaches for planning and learning, as demonstrated by its effectiveness in many applications, such as control of ground and aerial vehicles, articulated mechanisms and manipulators, and humanoid robots. In computational neuroscience and human motor control, stochastic optimal control theory is the primary framework used in the process of modeling the underlying computational principles of the neural control of movement. Furthermore, in financial engineering, stochastic optimal control provides the main computational and analytical framework, with widespread application in portfolio management and stock market trading. By and large, prior work on stochastic control theory and algorithms imposes restrictive conditions such as differentiability of the dynamics and cost functions, and furthermore requires certain assumptions involving the control authority and stochasticity to be met. Thus, it may only address special classes of systems. The goal of this research is to establish a framework that goes beyond these limitations. In particular, we propose a learning stochastic control framework which capitalizes on the innate relationship between certain nonlinear PDEs and Forward and Backward SDEs (FBSDEs) demonstrated by a nonlinear version of the Feynman-Kac lemma. By means of this lemma, we are able to obtain a probabilistic representation of the solution to the nonlinear Hamilton-Jacobi-Bellman equation, expressed in form of a system of decoupled FBSDEs. This system of FBSDEs can then be simulated by employing linear regression techniques. The overall approach will allow us to learn the value function in stochastic optimal control problems with highly nonlinear dynamics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn addition, the proposed approach should exhibit the following characteristics:\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003EPerform stochastic control and trajectory optimization without linearization of the dynamics and quadratic approximations of the cost functions.\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003EFind nonlinear feedback control policies that yield higher performance than their traditional trajectory optimization counterparts.\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003EBe based on sampling, scalable, and therefore directly applicable to high dimensional systems, and able to accommodate parallel computation.\u003C\/li\u003E\r\n\t\u003Cli\u003EExpand the class of systems currently addressed by traditional stochastic optimal control methods.\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003EThe framework we propose to develop within this thesis will address several classes of stochastic optimal control, such as L2 , L1 , game theoretic and risk sensitive control.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003E\u0026middot;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C!--[endif]--\u003EProf. Panagiotis Tsiotras (Advisor)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003E\u0026middot;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C!--[endif]--\u003EProf. Evangelos Theodorou (AE)\u003C\/li\u003E\r\n\t\u003Cli\u003E\u003C!--[if !supportLists]--\u003E\u0026middot;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C!--[endif]--\u003EProf. Hao-min Zhou (MATH)\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Stochastic Optimal Control \u2013 An FBSDE Sampling Approach"}],"uid":"27836","created_gmt":"2017-03-23 18:16:43","changed_gmt":"2017-04-13 21:12:17","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-03-29T15:00:00-04:00","event_time_end":"2017-03-29T17:30:00-04:00","event_time_end_last":"2017-03-29T17:30:00-04:00","gmt_time_start":"2017-03-29 19:00:00","gmt_time_end":"2017-03-29 21:30:00","gmt_time_end_last":"2017-03-29 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589286":{"#nid":"589286","#data":{"type":"event","title":"Doctoral Thesis Defense: Johnny L. Worthy, III","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;Initialization of Sequential Estimation for Unobservable Dynamical Systems Using Partial Information in the Presence of Systemic Uncertainty\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Epresented by \u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EJohnny L Worthy III\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMonday, April 3\u0026nbsp; 3:00pm\u003C\/strong\u003E\u003Cbr \/\u003E\r\nMontgomery Knight Building\u003Cbr \/\u003E\r\nRoom 317\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESpace Situational Awareness (SSA) is defined the ability to characterize as fully as possible the space environment. Short, unobservable measurement sequences pose a challenge for traditional state estimation methodologies and instead admissible region based methods are used. The primary question addressed in this work is how to best initialize a sequential estimation scheme given an uncertain admissible region. First, an approximate analytic probability of set membership function is defined which takes into account systemic uncertainties when assigning set membership for the admissible region. The resulting uncertain admissible region fuzzy set may then be used as a bootstrap method to initialize sequential estimation schemes. Then, the uncertain admissible region is proven to be an uninformative prior and the necessary conditions for the uncertain admissible region to be treated as a PDF are defined based on observability in the system. However, the treatment of the uncertain admissible region as an uninformative prior still requires an assumption on the a priori distribution. An evidential reasoning based sequential estimator is then developed which removes entirely the need to make assumptions on the a priori distribution of the uncertain admissible region by utilizing plausibility and belief functions. Finally, a methodology is presented which enables a probabilistic association of a set of disparate sequences of unobservable measurements. This association methods uses an optimization based approach which enables a direct approximation of the PDF accompanying the state estimate in a computationally efficient way given the system is observable. The developed methodologies are tested and validated with both simulated observation data as well as experimental observation data collected with the Raven class Georgia Tech Space Object Research Telescope.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Marcus J. Holzinger\u003C\/strong\u003E,\u003Cbr \/\u003E\r\nAdvisor\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Daniel Scheeres \u003C\/strong\u003E\u003Cbr \/\u003E\r\nDepartment of Aerospace Engineering Sciences University of Colorado Boulder\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Glenn Lightsey\u003C\/strong\u003E\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Travis Blake \u003C\/strong\u003E\u003Cbr \/\u003E\r\n(Lt. Col., Ret. USAF) Senior Manager for Space Domain Awareness Lockheed Martin Space Systems\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDr. Mark Costello\u003C\/strong\u003E\u003Cbr \/\u003E\r\nSchool of Aerospace Engineering\u003Cbr \/\u003E\r\nGeorgia Institute of Technology\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EDoctoral candidates Johnny L. Worthy, III will present a defense of his doctoral research.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Initialization of Sequential Estimation for Unobservable Dynamical Systems Using Partial Information in the Presence of Systemic Uncertainty"}],"uid":"27836","created_gmt":"2017-03-24 22:25:45","changed_gmt":"2017-04-13 21:12:16","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-03T16:00:00-04:00","event_time_end":"2017-04-03T18:00:00-04:00","event_time_end_last":"2017-04-03T18:00:00-04:00","gmt_time_start":"2017-04-03 20:00:00","gmt_time_end":"2017-04-03 22:00:00","gmt_time_end_last":"2017-04-03 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589426":{"#nid":"589426","#data":{"type":"event","title":"Decision Control Lab Student Symposium","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to the \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDecision Control Lab\u0026#39;s\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EStudent Symposium\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, April 14\u003Cbr \/\u003E\r\n9 am- 5 pm\u003Cbr \/\u003E\r\nTechnology Square Research Building\u003Cbr \/\u003E\r\n85 5th Street NW\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Ca href=\u0022http:\/\/tinyurl.com\/DCL2017\u0022\u003ERSVP by April 5\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe Decision Control Lab is hosting a day-long symposium, featuring lightning talks, poster presentations, and a lecture by MIT\u0026#39;\u0026#39;s Prof. Hamsa\u0026nbsp; Balakrishnan.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"Register April 5 for this day-long event"}],"uid":"27836","created_gmt":"2017-03-29 00:25:57","changed_gmt":"2017-04-13 21:12:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-14T10:00:00-04:00","event_time_end":"2017-04-14T18:00:00-04:00","event_time_end_last":"2017-04-14T18:00:00-04:00","gmt_time_start":"2017-04-14 14:00:00","gmt_time_end":"2017-04-14 22:00:00","gmt_time_end_last":"2017-04-14 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003ERSVP here: \u003Cstrong\u003E\u003Ca href=\u0022http:\/\/https\/\/tinyurl.com\/DCL2017\u0022\u003Ehttps\/\/tinyurl.com\/DCL2017\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFind out more: \u003Ca href=\u0022http:\/\/www.dcl.gatech.edu\u0022\u003Ewww.dcl.gatech.edu\u003C\/a\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}},"589427":{"#nid":"589427","#data":{"type":"event","title":"AE Presents: Design Challenges in the James Webb  Telescope","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Design Challenges in the James Webb Space Telescope\u0026quot; \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003EKelley Kristau\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESenior Mechanical Test Engineer\u003Cbr \/\u003E\r\nNorthrop Grumman\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Cdiv\u003ELocated 1.5 million kilometers from Earth and operating over temperatures ranging from 360 Kelvin down to 7 Kelvin, the James Webb Space Telescope presents unique engineering challenges as it seeks to expand our understanding of the origins of the universe and search for habitable exo-planets.\u0026nbsp; Focusing on the JWST Mid-Infrared Imager Cryocooler as a case study in the trades necessary amongst engineering disciplines while taking into account larger mission and programmatic considerations, this talk will show how the design and evolution of one small bracket can tell the story of the most complex space telescope ever built.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Cdiv\u003EAn employee of Northrop Grumman Aerospace Systems since 2005, Kelley Ristau is currently a Senior Mechanical Test Engineer supporting the James Webb Space Telescope (JWST).\u0026nbsp; Prior to her assignment on JWST, Kelley has worked in a range of roles at NGAS, including Manufacturing Engineering, Business Development, Mechanical Design, and Materials Engineering and Research.\u0026nbsp; Kelley holds a B.S. Aerospace Engineering from the University of California, San Diego, and an M.S. Engineering from the University of California, Los Angeles, where her work focused on the utility of additive manufacturing in the fabrication of lightweight mirror segments for future space telescopes.\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A talk by Northrop Grumman Senior Mechanical Test Engineer Kelley Kristau"}],"uid":"27836","created_gmt":"2017-03-29 01:42:48","changed_gmt":"2017-04-13 21:12:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-11T16:30:00-04:00","event_time_end":"2017-04-11T17:30:00-04:00","event_time_end_last":"2017-04-11T17:30:00-04:00","gmt_time_start":"2017-04-11 20:30:00","gmt_time_end":"2017-04-11 21:30:00","gmt_time_end_last":"2017-04-11 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589494":{"#nid":"589494","#data":{"type":"event","title":"AE Presents: SysML-based Model-Based Engineering at ISAE-Supaero","body":[{"value":"\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EProf. \u003C\/strong\u003E\u003Cstrong\u003EPierre de Saqui-Sannes\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProfessor in Space Systems Engineering\u003Cbr \/\u003E\r\nISAE-SUPAERO \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;\u003C\/strong\u003E\u003Cstrong\u003ESysML-based Model-Based Engineering at ISAE-Supaero\u003C\/strong\u003E\u003Cstrong\u003E\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EApril 4 @ 4:30pm\u003Cbr \/\u003E\r\nMontgomery Knight 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E:\u003Cbr \/\u003E\r\nThe objective of the talk is to share an experience in using SysML and the free software Tool for real-time and networked system design with application to aeronautical and space systems. An educational case study will exemplify requirement capture, functional analysis, architectural\/behavioral design, model simulation, and model formal verification combining model checking, invariants and abstractions. Discussion will go on with past and ongoing research projects.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003Cbr \/\u003E\r\nPierre de Saqui-Sannes is full professor and academic advisor for student exchanges at ISAE-SUPAERO, Toulouse, France. He holds a PhD and a HDR (Habilitation to Supervise PhD students) in computer science. After a postdoctoral year at the University of Montreal, Canada, he joined ENSICA in 1992 and moved to ISAE-SUPAERO in 2007. Dr. de Saqui-Sannes lectures on real-time system modeling (SysML), and object-oriented design (UML, Java). His research interests include model-based engineering of real-time systems, SysML, formal methods, model simulation, model formal verification, and testing. He applies MBSE to aeronautical and space applications.\u0026nbsp; Also, he serves as academic advisor for student exchanges between ISAE-SUPAERO and Georgia Tech.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Pierre de Saqui-Sannes will present a talk SysML-based Model-Based Engineering at ISAE-Supaero"}],"uid":"33975","created_gmt":"2017-03-29 19:28:43","changed_gmt":"2017-04-13 21:12:13","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-04T17:30:00-04:00","event_time_end":"2017-04-04T18:30:00-04:00","event_time_end_last":"2017-04-04T18:30:00-04:00","gmt_time_start":"2017-04-04 21:30:00","gmt_time_end":"2017-04-04 22:30:00","gmt_time_end_last":"2017-04-04 22:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589498":{"#nid":"589498","#data":{"type":"event","title":"AE Presents: In Pursuit of a Vision -- Defining the Future of Vertical Flight ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cem\u003E\u003Cstrong\u003EIn Pursuit of a Vision: \u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EDefining the Future of Vertical Flight\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Ashish Bagai\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProgram Manager, Tactical Technology Office (TTO), DARPA\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EFriday, April 21, 2017\u003Cbr \/\u003E\r\n3:15 - 4:30 p.m.\u003Cbr \/\u003E\r\nGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. Bagai\u0026rsquo;s seminar will summarize DARPA\u0026#39;s contribution to advancing vertical flight technologies, and the position of his programs in this space. It will specifically contextualize the VTOL X-Plane program that he developed, along with a historical frame work that demonstrates capability gaps in vertical flight. Data from contemporary helicopters and historical experimental aircraft are used to identify trends in performance (flight speeds and efficiencies), and identify opportunity spaces that were used to design the VTOL X-Plane program. Justification for the program objectives and conceptual approach that was developed will be discussed, along with a top level description of the competitive program execution plan. An overview of the selected hybrid-electric XV-24A aircraft will be presented, along with a summary of key technologies that will be matured for future application. Additionally, details of a sub-scale demonstrator aircraft will be provided, along with a discussion on the flight test effort. The presentation will serve to exemplify the vast and emerging opportunities enabled by the program in advancing the state of the art. Finally, a discussion of areas of research opportunities, will be presented.\u003C\/p\u003E\r\n\r\n\u003Ch3\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003EDr. Ashis Bagai is a Program Manager with the Tactical Technology Office at the Defense Advanced Research Projects Agency (DARPA). He has been managing the development of novel vertical flight technologies and systems, most notably the ARES modular, reconfigurable air vehicle and the XV-24A hybrid-electric VTOL X-Plane \u0026mdash; concepts that are to be demonstrated in flight at full scale. Prior to joining DARPA, Dr. Bagai spent several years at Sikorsky Aircraft, mostly as an aerodynamicist and technical lead for rotor systems design, and before that at Boeing. 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Such thrusters offer greatly improved efficiency over chemical rockets and potentially allow for larger payloads or reduced mission costs. At the High Power Electric Propulsion Laboratory (HPEPL), electric propulsion devices such as Hall Effect thrusters are tested and characterized using a variety of tools and techniques. This presentation covers some of the performance parameters and measurement devices used at HPEPL to characterize electric propulsion devices and provides an analysis of a Hall Effect thruster for comparison with other propulsion devices.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EMulti-Element Tether Model for GTABB (Jagadeesh\u0026nbsp; Movva)\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003EHelicopter slung loads are subject to unsteady aerodynamic forces, causing dynamic interactions in all 6 degrees of freedom, which if not accounted for can decrease the performance and safety envelope of the vehicle severely. For many of these applications, the dynamic problems with aerodynamic forces are not analyzed due to the complexity of solving through high fidelity CFD. In the Nonlinear Aeroelasticity Laboratory, Professor Smith and her group have created their solution, known as Georgia Tech Aerodynamics of Bluff Bodies. The GTABB code is a reduced order physics-based model for bluff bodies with and without tethers. The research goal for the work will be to implement a new model for bluff body tethers into GTABB. The current system of fixing the body to the reference frame will be replaced with on that that can accept more conditions regarding the dynamics of the tether cables. The solution being evaluated is to create a tether segments of the entire tether to more accurately measure the tether dynamics. This presentation will outline the methodology utilized and implementation into GTABB.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EGeoffrey Rairigh \u003C\/strong\u003Ewill present his research entitled\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026quot;\u003Cem\u003ECharacterization of Electric Propulsion Devices\u003C\/em\u003E\u0026quot;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EJagadeesh Movva \u003C\/strong\u003Ewill present his research entitled\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026quot;\u003Cem\u003EMulti-Element Tether Model for GTABB\u003C\/em\u003E\u0026quot;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"A GT-AE tradition in which select students present their research"}],"uid":"27836","created_gmt":"2017-03-29 22:06:20","changed_gmt":"2017-04-13 21:12:13","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-07T13:00:00-04:00","event_time_end":"2017-04-07T14:00:00-04:00","event_time_end_last":"2017-04-07T14:00:00-04:00","gmt_time_start":"2017-04-07 17:00:00","gmt_time_end":"2017-04-07 18:00:00","gmt_time_end_last":"2017-04-07 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589591":{"#nid":"589591","#data":{"type":"event","title":"Ph.D. Thesis Proposal:  Andris D. Jaunzemis","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPhD Thesis Proposal by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAndris D. Jaunzemis\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor:\u0026nbsp; Dr. Marcus Holzinger)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Predictive Sensor Tasking and\u0026nbsp;Decision Support\u0026nbsp;in Space Situational Awareness\u0026nbsp;using Evidential Reasoning\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETuesday April 4, 2017 @ 1:30 p.m.\u003Cbr \/\u003E\r\nMontgomery Knight 317\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E:\u003Cbr \/\u003E\r\nSituation awareness is the perception of elements in the environment, comprehension of their meaning, and projection of their status into the future.\u0026nbsp;Space situational awareness (SSA) is particularly concerned with accurately representing state knowledge of space objects to accurately resolve potential threats, such as collision.\u0026nbsp;Maintaining SSA is essential to the command and control missions of the Joint Space Operations Center (JSpOC). Tracking techniques used in the space surveillance system still rely largely on models and applications from the 1950s and 1960s, while the number of tracked objects continues to grow with improved sensor technologies and ease-of-access to space.\u0026nbsp;This work re-frames the SSA sensor tasking problem to interrogate specific hypotheses using evidential reasoning.\u0026nbsp;First, the spacecraft anomaly detection problem is formulated as a binary hypothesis test using control cost and Mahalanobis distance metrics.\u0026nbsp;This formulation accounts for non-Gaussian boundary conditions to improve applicability to the non-linear dynamic regime of orbital mechanics.\u0026nbsp;Next, a sensor tasking criterion is developed based on reducing ambiguity in hypothesis resolution.\u0026nbsp;This technique tasks sensors to gather the data the leads to the most precise hypothesis resolution possible, and application of evidential reasoning provides a rigorous framework for the inclusion of diverse SSA sensors.\u0026nbsp;The proposed work builds upon this hypothesis-based tasking formulation through a novel approach, judicial evidential reasoning, that enables application to operational SSA scenarios with many hypotheses and many objects.\u0026nbsp;Inspired by game theoretic approaches, judicial evidential reasoning alternates competing priorities to gather support for and against each hypothesis.\u0026nbsp;The application of discrete and combinatorial optimization aids in finding tractable, near-optimal solutions to this very high-dimensional, mixed-integer problem.\u0026nbsp;Finally, the use of specific hypotheses for tasking also motivates a study of effects to the SSA decision-maker of conveying information at the abstraction-level of hypotheses.\u0026nbsp;A cognitive work analysis examines the decision support system elements unique to judicial evidential reasoning that support human decision-making and expertise.\u0026nbsp;By rigorously evaluating hypotheses and conveying this result to the decision-maker at the abstraction-level of hypotheses, this work yields decision-quality information, enables predictive tasking, and improves decision-maker situation awareness and workload.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee\u003C\/strong\u003E:\u003Cbr \/\u003E\r\n-\u0026nbsp;Dr. Marcus Holzinger (GT-AE)\u003Cbr \/\u003E\r\n- Dr. Karen Feigh (GT-AE)\u003Cbr \/\u003E\r\n- Dr. Mark Costello (GT-AE)\u003Cbr \/\u003E\r\n- Dr. Kim Luu (AFRL AMOS)\u003Cbr \/\u003E\r\n- Dr. Travis Blake (Lockheed Martin Space Systems)\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cPredictive Sensor Tasking and Decision Support in Space Situational Awareness using Evidential Reasoning\u201d"}],"uid":"33975","created_gmt":"2017-03-31 13:00:20","changed_gmt":"2017-04-13 21:12:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-04T14:30:00-04:00","event_time_end":"2017-04-04T16:30:00-04:00","event_time_end_last":"2017-04-04T16:30:00-04:00","gmt_time_start":"2017-04-04 18:30:00","gmt_time_end":"2017-04-04 20:30:00","gmt_time_end_last":"2017-04-04 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589598":{"#nid":"589598","#data":{"type":"event","title":"SAESAC Presents:  Gary Powers, Jr.","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EGary Powers, Jr.\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026quot;The U-2 Incident: A Son\u0026#39;s Perspective\u0026quot;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, April 12 @ 4:30 p.m.\u003Cbr \/\u003E\r\nGuggenheim Building Room 442\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout the talk:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nMr. Powers will discuss his father, Francis Gary Powers, the U-2 pilot who was shot down over Russia in May of 1960.\u0026nbsp; His discussion will include the Cold War, the misinformation surrounding his father\u0026#39;s capture, and his efforts to honor Cold War veterans and preserve Cold War history.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor anyone interested, there will be a book signing after the presentation.\u0026nbsp; Mr. Powers will have copies of \u003Cem\u003E Operation Overflight\u003C\/em\u003E, \u003Cem\u003EStrangers on a Bridge\u003C\/em\u003E, and the \u003Cem\u003EBridge of Spies\u003C\/em\u003E DVD available.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbout Gary Powers, Jr.:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBorn June 5, 1965, in Burbank, California, he is the son of Francis Gary and Claudia \u0026ldquo;Sue\u0026rdquo; Powers. Gary holds a Bachelor of Arts Degree in Philosophy from California State University, Los Angeles, and a Master Degree in Public Administration \/ Certification in Non-profit Management from George Mason University (GMU), Fairfax, Virginia. Recently, he consulted for a Steven Spielberg Cold War thriller, Bridge of Spies about James Donovan who brokered the 1962 spy exchange between Rudolph Abel and U-2 pilot Francis Gary Powers, Sr.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGary is the Founder and Chairman Emeritus of The Cold War Museum, a 501(c) (3) charity located at Vint Hill, VA 45 minutes west of Washington, DC, He founded the museum in 1996 to honor Cold War veterans, preserve Cold War history, and educate future generations about this time period. As Chairman of the Presidential Advisory Committee for the Cold War Theme Study he works with the National Park Service and leading Cold War experts to identify historic Cold War sites for commemorating, interpreting, and preservation. Because of his efforts to establish The Cold War Museum, the Junior Chamber of Commerce selected him as one of the \u0026ldquo;Ten Outstanding Young Americans\u0026rdquo; for 2002. Gary lectures internationally and appears regularly on the History, Discovery, and A\u0026amp;E Channels. He is married and has one son.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022The U-2 Incident:  A Son\u0027s Perspective\u0022"}],"uid":"33975","created_gmt":"2017-03-31 15:21:02","changed_gmt":"2017-04-13 21:12:11","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-12T17:30:00-04:00","event_time_end":"2017-04-12T18:30:00-04:00","event_time_end_last":"2017-04-12T18:30:00-04:00","gmt_time_start":"2017-04-12 21:30:00","gmt_time_end":"2017-04-12 22:30:00","gmt_time_end_last":"2017-04-12 22:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589635":{"#nid":"589635","#data":{"type":"event","title":"AE Presents:  Innovative Mini- and Micro Aerial Vehicle Projects at ISAE-SUPAERO","body":[{"value":"\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EYou are invited to hear\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Innovative Mini- and Micro Aerial Vehicle Projects at ISAE-SUPAERO\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EA talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. Jean-Marc Moschetta\u0026nbsp;\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003Eand\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003EDr. Patrick Fabiani \u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E\u003Cem\u003EAbout the Talk\u003C\/em\u003E\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cdiv\u003EMiniaturizing UAVs is an important issue in view of reducing the logistic footprint required to operate unmanned aerial systems (UAS). Developing autonomous smaller vehicles would open the way to UAV swarming and would allow for cheaper, or even disposable flying vehicles. However, downscaling UAVs still faces the problem of limited endurance because of the energy density required by the propulsion set. The presentation will be address a series of technical challenges associated to the design of mini- and micro- air vehicles for practical applications. Several examples will be given and discussed. The first example is the design of a VTOL drone for Mars exploration under the stringent constraint of a highly rarefied atmosphere. The second example will describe the optimization method as applied to maximizing the propulsive efficiency and minimizing the acoustic signature of micro-rotors, as applied to MAV missions requiring covertness . A third example referring to fixed-wing long-endurance mini-UAVs will be discussed. The idea is to benefit from the energy contained in the perturbed atmosphere by following specific trajectories as inspired by the observation of the Albatross flight. Yet, as opposed to natural flyers, UAVs can be powered so as to allow for thrust-augmented dynamic soaring which can lead to a drastic growth of the UAV flight range. Finally, various research projects conducted at ISAE-SUPAERO will be described and illustrated, such as: the design process and control laws of convertible MAVs capable of flying in airplane or helicopter modes and a new \u0026quot;deep learning\u0026quot; method as applied to enhancing autopilot safety.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speakers\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cp\u003E\u003Cstrong\u003EJean-Marc Moschetta\u003C\/strong\u003E graduated from ISAE-SUPAERO in 1987 and obtained his PhD degree in Aerodynamics in 1991. Since 2000, he has been a full professor of Aerodynamics at ISAE-SUPAERO and a consultant at ONERA. He is currently the head of the UAV program at ISAE-SUPAERO and director of the MAV Research Center, a French research network on MAVs, which fosters a dozen research laboratories in the South West of France. Jean-Marc Moschetta has published numerous papers on the design and the aerodynamics of MAVs and is currently a member of the editorial board for the International Journal of MAVs (IJMAV). From 2001, he organized or co-organized several MAV conferences and will host next year edition in Toulouse, France (\u003Ca href=\u0022http:\/\/www.imav2017.org\u0022 id=\u0022LPlnk43269\u0022 target=\u0022_blank\u0022\u003Ewww.imav2017.org\u003C\/a\u003E).\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\u003Cstrong\u003EDr. Patrick Fabiani\u003C\/strong\u003E has been since 2015 the Scientific Vice-President of ISAE-SUPAERO, Institut Sup\u0026eacute;rieur de l\u0026rsquo;A\u0026eacute;ronautique et de l\u0026rsquo;Espace, the major French aerospace school of engineering, and as such he is the director in charge of the research policy of the laboratories. He was previously the deputy director of research of ISAE-SUPAERO since 2013, and just previously Head of the Systems Control and Flight Dynamics Department of ONERA, the French national aerospace laboratory since 2005. He has been in charge of the ReSSAC autonomous systems laboratory and UAV projects since 2002 until 2013. His research domain is related to decision making, artificial intelligence, automated planning under uncertainty applied to autonomous systems, mainly drones. Visiting Scholar in the Computer Science Department Robotics Laboratory at Stanford University in 1997-1999, he completed his PhD in Artificial Intelligence in 1996, MSc in Automatic Control and graduated as engineer from SupAero Toulouse 1992. Patrick Fabiani graduated from Ecole Polytechnique Paris in 1990.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Jean-Marc Moschetta and Dr. Patrick Fabiani will speak"}],"uid":"27836","created_gmt":"2017-03-31 21:25:34","changed_gmt":"2017-04-13 21:12:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-06T15:30:00-04:00","event_time_end":"2017-04-06T16:30:00-04:00","event_time_end_last":"2017-04-06T16:30:00-04:00","gmt_time_start":"2017-04-06 19:30:00","gmt_time_end":"2017-04-06 20:30:00","gmt_time_end_last":"2017-04-06 20:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589502":{"#nid":"589502","#data":{"type":"event","title":"AIAA Presents: Entrepreneurial Rocket Science with Tanveer Chandok","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EThe Georgia Tech Chapterof the American Institute of Aeronautics and Astronautics invites your to a special event\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cul\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch3\u003E\u003Cstrong\u003EAre you an international student interested in aerospace engineering? \u003C\/strong\u003E\u003C\/h3\u003E\r\n\t\u003C\/li\u003E\r\n\t\u003Cli\u003E\r\n\t\u003Ch3\u003E\u003Cstrong\u003EDo you want to build a start-up? \u003C\/strong\u003E\u003C\/h3\u003E\r\n\t\u003C\/li\u003E\r\n\u003C\/ul\u003E\r\n\r\n\u003Cp\u003EBangalore, India native \u003Cstrong\u003ETanveer Chandok\u003C\/strong\u003E co-founded a start-up\u003Cstrong\u003E WonUpIt\u003C\/strong\u003E, in 2014, the same year he graduate from Tech with a degree in aerospace engineering. After moving to New Jersey for a corporate job, he returned to Atlanta last year to devote himself full-time to that company.\u0026nbsp; Find out why it\u0026#39;s worth it.\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EOpen to all majors!\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003ETanveer Chandok, a native of Bangalore, India, will speak about the opportunities he\u0026#39;s pursued in his chosen field of aerospace engineering.\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"AE alumnus Tanveer Chadok will talk about the many successes he\u0027s enjoyed as an international student who pursued aerospace engineering."}],"uid":"27836","created_gmt":"2017-03-29 22:42:18","changed_gmt":"2017-04-13 21:12:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-04T12:00:00-04:00","event_time_end":"2017-04-04T13:00:00-04:00","event_time_end_last":"2017-04-04T13:00:00-04:00","gmt_time_start":"2017-04-04 16:00:00","gmt_time_end":"2017-04-04 17:00:00","gmt_time_end_last":"2017-04-04 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589584":{"#nid":"589584","#data":{"type":"event","title":"AE Presents: \u201cSwirl Flame Dynamics in a Gas Turbine Model Combustor at Elevated Pressure\u201d","body":[{"value":"\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003EThe Daniel Guggenheim School of Aerospace Engineering Presents\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026ldquo;Swirl Flame Dynamics in a Gas Turbine Model Combustor at Elevated Pressure\u0026rdquo;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EDr. Isaac Boxx\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003ESenior Scientist - Institute of Combustion Technology of the German Aerospace Center \u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Lecture\u003C\/strong\u003E\u003C\/em\u003E\u003Cbr \/\u003E\r\nThe German Aerospace Center (Deutsches Zentrum f\u0026uuml;r Luft- und Raumfahrt, DLR) has led an effort in recent years to bridge the gap between fundamental scientific studies of combustion dynamics and system-level characterization of gas turbine combustors. This effort has focused on acquiring detailed measurements of well-defined turbulent flames in generic, swirl-stabilized combustors over a wide range of operating conditions, including at elevated pressure. These flames are designed to capture much of the complexity of a modern, swirl-stabilized gas turbine combustor, while maintaining excellent optical access for point- and planar laser measurement techniques.\u0026nbsp; This seminar will focus on the latest in this series of measurements, wherein high bandwidth laser imaging diagnostics (kHz acquisition-rate particle image velocimetry and planar laser-induced fluorescence) were applied simultaneously to study the effect of radial air-staging in a swirled combustor at 5 bars pressure.\u003C\/p\u003E\r\n\r\n\u003Ch4\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E\u003C\/em\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EDr. Isaac Boxx is a senior scientist at the Institute of Combustion Technology of the German Aerospace Center (Deutsches Zentrum f\u0026uuml;r Luft- und Raumfahrt \u0026ndash; \u0026ldquo;DLR\u0026rdquo;) in Stuttgart. His research focusses on understanding the structure and dynamics of turbulent flames at engine-relevant conditions. Dr. Boxx is a pioneer in the development and application of high-bandwidth laser imaging techniques (kHz particle image velocimetry and planar laser-induced fluorescence) for the study of turbulent flames. These techniques have helped revolution our understanding of combustion instability, thermoacoustic pulsation, blow-off and flashback in gas turbine engines.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EPrior to working at DLR, Dr. Boxx completed his PhD at the University of Texas at Austin and was a research associate with the Air Force Research Laboratory in Dayton, OH. His research is supported by the European Research Council, Air Force Office of Scientific Research and the German Aerospace Center.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Isaac Boxx is a Senior Scientist at the Institute of Combustion Technology of the German Aerospace Center -DLR- will speak"}],"uid":"27836","created_gmt":"2017-03-30 21:41:13","changed_gmt":"2017-04-13 21:12:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-14T15:00:00-04:00","event_time_end":"2017-04-14T16:00:00-04:00","event_time_end_last":"2017-04-14T16:00:00-04:00","gmt_time_start":"2017-04-14 19:00:00","gmt_time_end":"2017-04-14 20:00:00","gmt_time_end_last":"2017-04-14 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589586":{"#nid":"589586","#data":{"type":"event","title":"AE Presents: Model-Driven Engineering for Avionics System: leveraging the Architecture and Analysis Design Language","body":[{"value":"\u003Cp\u003EThe Daniel Guggenheim School of Aerospace Engineering invites you to hear\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Model-Driven Engineering for Avionics System: leveraging the Architecture and Analysis Design Language\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ea talk by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EProf. J\u0026eacute;r\u0026ocirc;me Hugues \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAssociate Professor\u003Cbr \/\u003E\r\nDepartment of Complex Systems Engineering of the Institute for Space and Aeronautics Engineering (ISAE) \u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Talk\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EModel-Based Engineering provides a framework for the design, analysis and implementation of complex systems. This is of interest for real-time critical systems: multiple analysis can be performed so as to increase confidence in the system being built. Then, one can leverage autocoding techniques to generate the system targeting high-integrity real-time operating systems\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EIn this talk, we will present the architecture analysis and design language (AADL), an SAE International standard, and the contributions done at ISAE on this topic\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003EAbout the Speaker\u003C\/strong\u003E:\u0026nbsp;\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\r\n\u003Cdiv\u003EJ\u0026eacute;r\u0026ocirc;me Hugues is associate professor at the Department of Complex Systems Engineering of the Institute for Space and Aeronautics Engineering (ISAE) in Toulouse. He holds an HDR (2017), a PhD (2005) and engineering degree from the Telecom ParisTech (2002). He is responsible of several distributed and real-time systems courses He is the head of the \u0026quot;Embedded Systems\u0026quot; Master Program at ISAE, and responsible for the management of the Embedded Systems Engineering curriculum.\u003C\/div\u003E\r\nHis research interests are focused on software architecture to support the design of complex software-based real-time and embedded systems; and programming languages and artifacts to support them.\r\n\r\n\u003Cdiv\u003EHe is also a member of the SAE AS-2C committee working on the definition of the AADL architecture description language to assist the designer in various stages of its design: formal verification, dimensioning down to code generation. He is the main author of two annexes document for AADLv2, and a reviewer of the AADLv2 core document, and associated annexes. He leads the Ocarina project, an AADL model processor.\u003C\/div\u003E\r\n\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Jerome Hugues from the Institute for Space and Aeronautics Engineering will speak"}],"uid":"27836","created_gmt":"2017-03-30 22:15:20","changed_gmt":"2017-04-13 21:12:11","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-05T12:00:00-04:00","event_time_end":"2017-04-05T13:00:00-04:00","event_time_end_last":"2017-04-05T13:00:00-04:00","gmt_time_start":"2017-04-05 16:00:00","gmt_time_end":"2017-04-05 17:00:00","gmt_time_end_last":"2017-04-05 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589787":{"#nid":"589787","#data":{"type":"event","title":"AHS Lunch \u0026 Learn: Aerial Reporting with Mark McKay","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EThe Georgia Tech Chapter of the\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EAmerican Helicopter Society \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u003Cem\u003Einvites you to \u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003E\u0026quot;Breaking News with Airborne Advantage\u0026quot;\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Ea talk by \u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWSB-TV Traffic Reporter\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EMark McKay\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ELearn what it takes to report breaking news from a helicopter\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EPizza and drinks will be provided to those who arrive by 11:05 a.m.\u003C\/strong\u003E\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The Georgia Tech Chapter of the American Helicopter Society will have a free lunchtime session featuring WSB-TV aerial reporter Mark McKay"}],"uid":"27836","created_gmt":"2017-04-04 20:32:04","changed_gmt":"2017-04-13 21:12:08","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-11T12:00:00-04:00","event_time_end":"2017-04-11T13:00:00-04:00","event_time_end_last":"2017-04-11T13:00:00-04:00","gmt_time_start":"2017-04-11 16:00:00","gmt_time_end":"2017-04-11 17:00:00","gmt_time_end_last":"2017-04-11 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"589816":{"#nid":"589816","#data":{"type":"event","title":"UCEM Presents: Dean\u2019s Direction - Gary May","body":[{"value":"\u003Ch2\u003E\u003Cstrong\u003EThe University Center of Exemplary Mentoring (UCEM) \u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003E\u003Cstrong\u003Epresents\u003C\/strong\u003E\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EDean Gary May\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003EOutgoing Dean (and UCEM PI) \u003Cstrong\u003EGary May\u003C\/strong\u003E will give an informative and inspirational seminar before assuming his new position as the Chancellor at UC Davis this summer. His seminar will be autobiographical in nature regarding his personal and professional trek, inclusive of time as a student and faculty member at Georgia Tech.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EAdditionally, Professor \u003Cstrong\u003EStephen Ruffin \u003C\/strong\u003Ewill provide updates regarding the next round of UCEM fellowship solicitation and selections planned for this summer.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u003Cem\u003E\u003Cstrong\u003ELunch will be provided on a first-come, first-served basis.\u003C\/strong\u003E\u003C\/em\u003E\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The University Center of Exemplary Mentoring (UCEM) will present a Luncheon Seminar featuring Dean Gary May"}],"uid":"27836","created_gmt":"2017-04-05 15:25:57","changed_gmt":"2017-04-13 21:12:07","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-11T12:00:00-04:00","event_time_end":"2017-04-11T13:00:00-04:00","event_time_end_last":"2017-04-11T13:00:00-04:00","gmt_time_start":"2017-04-11 16:00:00","gmt_time_end":"2017-04-11 17:00:00","gmt_time_end_last":"2017-04-11 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"hg_media":{"587660":{"id":"587660","type":"image","title":"Gary May, Dean of the College of Engineering","body":null,"created":"1487627782","gmt_created":"2017-02-20 21:56:22","changed":"1487627782","gmt_changed":"2017-02-20 21:56:22","alt":"","file":{"fid":"223962","name":"GMay1.jpeg","image_path":"\/sites\/default\/files\/images\/GMay1.jpeg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/GMay1.jpeg","mime":"image\/jpeg","size":93165,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/GMay1.jpeg?itok=9cnjYc6M"}}},"media_ids":["587660"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"173971","name":"UCEM"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1789","name":"Conference\/Symposium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590144":{"#nid":"590144","#data":{"type":"event","title":"Ph.D. Thesis Defense:  Jason D. Frieman","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense by\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EJason D. Frieman\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E(Advisor: Professor Mitchell Walker)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003E\u0026ldquo;Characterization of Background Neutral Flows in Vacuum Test Facilities and Impacts on Hall Effect Thruster Operation\u0026rdquo;\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EWednesday, May 3, 2017 @ 3:00p.m.\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003E\u003Cem\u003EMontgomery Knight Building, Room 317\u003C\/em\u003E\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp; Hall effect thrusters (HETs) are a type of electrostatic electric propulsion device characterized by high specific impulses, thrust efficiencies, and thrust densities. These performance attributes make HETs an appealing choice for use as the primary propulsion system onboard a number of Earth-orbiting and interplanetary satellite missions. However, extensive ground testing of HETs has revealed that HET operation, performance, and plume properties are impacted by facility-dependent parameters such as pumping capacity. Specifically, it has been shown that increases in facility pressure result in artificial increases in device thrust and efficiency due to the ingestion of ambient background neutrals present in the vacuum facility. Although several analytical and semi-empirical models of HET neutral ingestion exist, none have been shown to be able to accurately predict empirical observations across a range of HETs and test facilities.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp; This work focuses on investigating the hypothesis that a bulk background flow of neutrals exists inside vacuum test facilities, which varies as a function of facility-specific design and operating parameters (i.e., pump placement and pressure modulation technique) and contributes to HET neutral ingestion and the concomitant impacts on performance and plume characteristics. The first portion of this work determines if a bulk background flow exists inside ground test facilities, and characterizes how this flow field changes as a function of facility-specific parameters including pump placement. To do this, a general analytic model of the organized flow of background neutrals inside ground test facilities is created and validated using existing empirical measurements taken using several different facilities and HETs. This model is then used to analytically determine the sensitivity of the background flow field to facility variables including pump placement and pressure modulation technique. These studies are repeated empirically and confirm the accuracy of the model as well as the existence of the bulk background flow, its relationship to HET ingestion, and its sensitivity to facility operating parameters.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp; The second portion of this work seeks to quantify the impact of the background flow field (and concomitant neutral ingestion) on HET operation. Empirical measurements of the time-resolved discharge current, ion energy distribution, thrust, plume plasma properties, and ion current density profile of three HETs are performed and confirm the hypothesis that a full description of the background flow field can better explain the observed sensitivity of certain plume properties to changes in facility pressure than can pressure magnitude. Changes in the background flow field are shown to be unable to fully describe changes in discharge current oscillation characteristics, however, changes in facility pressure are shown to directly cause mode transitions, thus suggesting that optimal magnetic field settings may change between test facilities.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u201cCharacterization of Background Neutral Flows in Vacuum Test Facilities and Impacts on  Hall Effect Thruster Operation\u201d"}],"uid":"33975","created_gmt":"2017-04-10 17:27:42","changed_gmt":"2017-04-13 21:12:03","author":"Margaret Ojala","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-05-03T16:00:00-04:00","event_time_end":"2017-05-03T18:00:00-04:00","event_time_end_last":"2017-05-03T18:00:00-04:00","gmt_time_start":"2017-05-03 20:00:00","gmt_time_end":"2017-05-03 22:00:00","gmt_time_end_last":"2017-05-03 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"2082","name":"aerospace engineering"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590338":{"#nid":"590338","#data":{"type":"event","title":"Doctoral Defense: Ianko Chterev","body":[{"value":"\u003Ch3\u003E\u003Cstrong\u003EPhD Thesis Defense\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eby\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EIanko Chterev\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch3\u003E\u003Cstrong\u003E(Advisor: Prof. Tim Lieuwen)\u003C\/strong\u003E\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E1:15pm, Monday April 17\u003Cbr \/\u003E\r\nWoodruff MRDC Building (Room 3515)\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EFlow Characterization of Lifted Flames in Swirling, Reacting Flows\u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003Cbr \/\u003E\r\nSwirl stabilized combustors are commonly used in gaseous fueled land-based gas turbines and liquid fueled aerospace combustors to achieve simultaneously high efficiency, low emissions, wide operability limits, and low thermal and mechanical hardware loadings. Flame shape and location are critical to successful design, and are, therefore, the general focus of this work.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn premixed swirl combustion aerodynamically stabilized flames are sometimes observed and desirable as they potentially reduce hardware heat loadings. However, their understanding is largely phenomenological and geometry specific. First, aerodynamically stabilized flames are subject to flow perturbations such as a precessing vortex core (PVC), and therefore, this thesis studies how a precessing flow field affects time-averaged quantities such as flame location. Second, in swirling flowfields with no interior time-averaged stagnation point, flames are sometimes aerodynamically stabilized by instantaneous stagnation points created by large scale structures such as the PVC. Since this places the flame in a time-averaged reverse flow, natural questions are what the flame and flow characteristics are at the flame stabilization location, such as flame stretch, and why the flame does not flash back.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EExperiments in high pressure, multi-phase, hydrocarbon fueled, reacting flows are highly complex, and quantities such as liquid and gas phase fuel distribution, heat release and flowfield are difficult to obtain. Thus, another focus of this work is experimental development to study the internal physics.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFirst, this thesis finds that precession in radial-axial planar measurements can result in the time-averaged stagnation point to be located in a highly negative region of the flow. Since the time-averaged flow field is often used to determine the flame location, these findings indicate that time-averaged treatments may lead to erroneous results. Precession can also alter the general flow field topology by inducing asymmetries and can cause time-averages to converge slower.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESecond, the local flow field of a flame aerodynamically stabilized by instantaneous stagnation\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cstrong\u003EIanko Chterev\u003C\/strong\u003E will present his doctoral research entitled \u0026quot;Flow Characterization of Lifted Flames in Swirling, Reacting Flows\u0026quot; before a committee to include his advisor, Prof. \u003Cstrong\u003ETimothy Lieuwen\u003C\/strong\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":" \u0022Flow Characterization of Lifted Flames in Swirling, Reacting Flows\u0022 "}],"uid":"27836","created_gmt":"2017-04-12 20:32:48","changed_gmt":"2017-04-13 21:12:01","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-17T14:15:00-04:00","event_time_end":"2017-04-17T16:15:00-04:00","event_time_end_last":"2017-04-17T16:15:00-04:00","gmt_time_start":"2017-04-17 18:15:00","gmt_time_end":"2017-04-17 20:15:00","gmt_time_end_last":"2017-04-17 20:15:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[{"id":"168695","name":"doctoral defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}},"590343":{"#nid":"590343","#data":{"type":"event","title":"Yellow Jacket Flying Club Presents:  The Lost Squadron: Expedition to Recover WWII P-38s \u0026 B-17s in Greenland","body":[{"value":"\u003Ch3\u003EThe Yellow Jacket Flying Club\u003C\/h3\u003E\r\n\r\n\u003Cp\u003E\u003Cem\u003Einvites you to hear\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Ch1\u003E\u003Cstrong\u003EThe Lost Squadron: Expedition to Recover WWII P-38s \u0026amp; B-17s in Greenland \u003C\/strong\u003E\u003C\/h1\u003E\r\n\r\n\u003Ch2\u003E\u003Cem\u003Ea talk by \u003C\/em\u003E\u003C\/h2\u003E\r\n\r\n\u003Ch2\u003E\u003Cstrong\u003EPat Epps and former Dr.\u003C\/strong\u003E\u003Cstrong\u003E Richard Taylor, \u003Cem\u003Ea former GT professor \u003C\/em\u003E\u003C\/strong\u003E\u003C\/h2\u003E\r\n\r\n\u003Cdiv\u003EIn the summer of 1981, Pat Epps and Richard Taylor\u0026nbsp;set forth on their first adventure to the Greenland ice cap in search of the Lost Squadron \u0026ndash; two World War II Boeing B-17 Flying Fortress bombers and six Lockheed P-38 Lightnings.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EThe squadron was forced to land on the Greenland ice cap on July 15, 1942 after hours of flying in bad weather and running low on fuel. Epps\u0026rsquo; adventure began as a lark when he was admiring a customer\u0026rsquo;s new Learjet and the customer responded, \u0026ldquo;What I really want is a P-38\u0026rdquo;. Epps certainly knew where six P-38 Lightnings were located so he joined forces with a friend and two airline pilots who already had the search and salvage rights from the Danish government.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EEpps was an active member of, and eventually led, the Greenland Expedition Society (GES) team on seven trips to the ice cap over the next 11 years. The summer of 1992 marked GES\u0026rsquo; monumental recovery of the vintage Lockheed P-38 Lightning, Glacier Girl, buried 265 feet below the Greenland ice cap for 50 years.\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EThe story of this epic adventure has been retold in the book, \u003Cstrong\u003E\u003Cem\u003EThe Lost Squadron\u003C\/em\u003E\u003C\/strong\u003E, and documented in National Geographic History Channel\u0026rsquo;s, \u003Cstrong\u003E\u003Cem\u003EHunt for the Lost Squadron\u003C\/em\u003E\u003C\/strong\u003E. Additionally, Epps and the GES team\u0026rsquo;s expedition have been documented in numerous periodicals such as Smithsonian\u0026rsquo;s \u003Cstrong\u003E\u003Cem\u003EAir \u0026amp; Space \u003C\/em\u003E\u003C\/strong\u003Eand \u003Cem\u003E\u003Cstrong\u003ELife\u003C\/strong\u003E\u003C\/em\u003E magazines.\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A tale of aviation and adventure as told by Pat Epps and RIchard Taylor"}],"uid":"27836","created_gmt":"2017-04-12 22:46:22","changed_gmt":"2017-04-13 21:12:01","author":"Kathleen Moore","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-04-17T19:30:00-04:00","event_time_end":"2017-04-17T21:30:00-04:00","event_time_end_last":"2017-04-17T21:30:00-04:00","gmt_time_start":"2017-04-17 23:30:00","gmt_time_end":"2017-04-18 01:30:00","gmt_time_end_last":"2017-04-18 01:30:00","rrule":null,"timezone":"America\/New_York"},"extras":["free_food"],"groups":[{"id":"1239","name":"School of Aerospace Engineering"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}