{"656891":{"#nid":"656891","#data":{"type":"event","title":"PhD Defense by Melissa Ruszczyk","body":[{"value":"\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn partial fulfillment of the requirements for the degree of\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDoctor of Philosophy in Ocean Science \u0026amp; Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMelissa Ruszczyk\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWill defend her dissertation\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECrustacean Behavior and Morphology in Low and Intermediate Reynolds Number Environments\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThursday, April 14, 2022\u003C\/p\u003E\r\n\r\n\u003Cp\u003E9:00am\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn person: SEB 122\u003C\/p\u003E\r\n\r\n\u003Cp\u003EVirtual: \u003Ca href=\u0022https:\/\/bluejeans.com\/932846203\/5149\u0022\u003Ehttps:\/\/bluejeans.com\/932846203\/5149\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003Cstrong\u003EThesis Advisors:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Jeannette Yen, Ph.D.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Donald R. Webster, Ph.D.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Civil and Environmental Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\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\u003Cp\u003EDr. Marc Weissburg, Ph.D.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Emanuele Di Lorenzo, Ph.D.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Earth and Atmospheric Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. David W. Murphy, Ph.D.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDepartment of Mechanical Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003EUniversity of South Florida\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESummary\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAn organism\u0026rsquo;s physical environment can dramatically affect an organisms\u0026rsquo; behavior and morphological design. The Reynolds number represents the ratio between inertial and viscous forces in a fluid environment. This study is concerned with the challenges crustaceous plankton face resulting from living in a low- and intermediate-Reynolds number aquatic environment.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the first part of this study, the freshwater copepod \u003Cem\u003EHesperodiaptomus shoshone\u003C\/em\u003E is exposed to a Burgers vortex- a flow feature meant to mimic turbulent eddies found in an organism\u0026rsquo;s environment. Male and female copepods were exposed to four vortex intensity levels plus a negative control in either a horizontal or vertical orientation of the vortex axis. Trajectory analysis of \u003Cem\u003EH. shoshone\u003C\/em\u003E swimming behavior shows that this copepod changes its swimming behavior in response to vortex orientation and not vortex level- a notable difference from marine copepods exposed to the same flow feature. These results may be linked to ecological and geographic differences between freshwater and marine copepods.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the second part of this study, the pleopod synchrony in the mysid shrimp \u003Cem\u003EAmericamysis bahia\u003C\/em\u003E is quantified. Shrimp and krill beat their pleopods in an adlocomotory sequence, creating a metachronal wave. Usually, pleopod pairs on the same abdominal segment beat in tandem with each other, resulting in one 5-paddle stroke. \u003Cem\u003EAmericamysis bahia\u003C\/em\u003E\u0026rsquo;s pleopods on the same abdominal segment beat independently from each other, resulting in two 5-paddle metachronal cycles that run ipsilaterally along the body, 180\u0026deg; out of phase with each other. High-speed recordings of \u003Cem\u003EA. bahia \u003C\/em\u003Estroke kinematics reveal how this mysid changes its stroke amplitude, beat frequency, and inter-appendage phase lag to achieve high speeds. Trends with Strouhal number and advance ratio suggest that the kinematics of metachrony in \u003Cem\u003EA. bahia\u003C\/em\u003E are tuned to achieve large normalized swimming speeds.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EIn the third part of this study, stroke kinematics in \u003Cem\u003EEuphausia pacifica \u003C\/em\u003E(Pacific krill) are quantified for the first time. Comparing stroke kinematics between \u003Cem\u003EE. pacifica\u003C\/em\u003E (1-3cm body length) and the larger \u003Cem\u003EE. superba \u003C\/em\u003E(4-6cm body length) shows that these two organisms achieve similar swimming modes through a different set of stroke kinematics. To better understand the relationship between stroke kinematics, resulting swimming mode, and length scale, these data are used in tandem with previously published stroke kinematics of other 5-paddle metachronal swimmers, including mysid shrimp and stomatopods, to identify broad trends across species and length scale in metachrony. Principle component analysis (PCA) reveals trends in stroke kinematics, Reynolds number, and swimming mode as well as variation among taxonomic order. Additionally, uniform phase lag, i.e. when the timing between power strokes of all adjacent pleopods is equal, in 5-paddles systems is achieved at different Reynolds numbers for each swimming mode, which highlights the importance of taking into consideration stroke kinematics, length scale, and resulting swimming mode in bio-inspired design applications.\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":"Crustacean Behavior and Morphology in Low and Intermediate Reynolds Number Environments"}],"uid":"27707","created_gmt":"2022-03-31 19:33:03","changed_gmt":"2022-03-31 19:33:03","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-04-14T10:00:00-04:00","event_time_end":"2022-04-14T12:00:00-04:00","event_time_end_last":"2022-04-14T12:00:00-04:00","gmt_time_start":"2022-04-14 14:00:00","gmt_time_end":"2022-04-14 16:00:00","gmt_time_end_last":"2022-04-14 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"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"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}