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Monday, June 6, 2022
10:00 AM - 11:00 AM Download Add to Google Calendar
  • Department of Estuarine and Ocean Sciences PhD Proposal Defense Announcement - by Bailey J. Avila
  • Location: > See description for location
  • Contact: > See Description for contact information
  • Description: The School for Marine Science and Technology Department of Estuarine and Ocean Sciences PhD Proposal Defense Announcement "Vortices and Energetics in the Ocean, from Climate to Caudal" By Bailey J. Avila Committee Members: Dr. Miles Sundermeyer, SMAST, University of Massachusetts Dartmouth Dr. Geoffrey Cowles, SMAST, University of Massachusetts Dartmouth Dr. Banafsheh Seyed-Aghazadeh, Mechanical Engineering, University of Massachusetts Dartmouth Dr. Kristina Kamensky, Naval Undersea Warfare Center - Newport Dr. Marie-Pascale Lelong, North West Research Associates Monday, June 6, 2022 10:00 am SMAST East, Rooms 101/102 836 S. Rodney French Blvd, New Bedford, MA And via Zoom Abstract: This dissertation aims to understand ocean energetics in two parts. The first part addresses energetics at the submesoscale and the importance of vortical mode. Globally, energy is put into the ocean from tides and wind, ultimately making its way down scale to dissipation. Understanding how and where this energy is transferred is critical for ocean global circulation models as they move to resolve mesoscale processes, and is a topic of ongoing study. In Chapter 1 numerical simulations will be used to study energy exchanges between internal waves and vortical mode, specifically identifying processes and the scales at which vortical mode is generated. A linear decomposition of model fields into internal wave and vortical mode components is used to explore energy exchanges both in physical space and spectrally. In physical space fluid parcels are tracked to study the modification of potential vorticity. Spectral analyses are further used to reveal cascades of energy both down- and up-scale due to internal waves and vortical mode, respectively. Results show that vortical mode appears across all scales everywhere internal waves are present, and that nonlinear interactions may be a more important generation mechanism than turbulent dissipation, which was previously thought to dominate in the ocean interior. The second part of this study will address the energetics and efficiency of fish locomotion. Swimming efficiency has been studied for decades with application to marine propulsion and biomimetics. Swimming fish extract and conserve energy by utilizing vortices around upstream bodies or by shedding their own vortices. Definitions of efficiency consider either the hydrodynamics and flow around the body of the fish contributing to thrust, or the mechanics and supply of energy to generate such motions (cost of transport). Chapter 2 will address the first definition concerning hydrodynamics. A parametric study to maximize Froude efficiency will be conducted for steady thunniform swimming using the numerical model, OpenFOAM. Parameters considered will include tail-beat frequency, amplitude, and wavenumber. Similar to what occurs in nature, simulations will optimize both Froude efficiency and cost of transport, with future application to biomimetic fish. Expanding on these findings, Chapter 3 will identify what signatures of pressure, vorticity, or drag around a steady, thunniform swimming fish characterizes efficient swimming. This will enable classification of whether a specific swimming motion is efficient or inefficient. The work in Chapters 2 and 3 will aid development of closed-loop control of biomimetic underwater vehicles. ******************************************************************************** Join Zoom Meeting https://umassd.zoom.us/j/94612306087?pwd=YWkyZ2VxZkl2OHlyUytRcFNkTFFtUT09 Meeting ID: 946 1230 6087 Passcode: 225304 One tap mobile +16468769923,,94612306087#,,,,*225304# US (New York) +13017158592,,94612306087#,,,,*225304# US (Washington DC) Dial by your location +1 646 876 9923 US (New York) +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 669 900 6833 US (San Jose) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) Meeting ID: 946 1230 6087 Passcode: 225304 Find your local number: https://umassd.zoom.us/u/acpp6pg5pK Join by SIP 94612306087@zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (Amsterdam Netherlands) 213.244.140.110 (Germany) 103.122.166.55 (Australia Sydney) 103.122.167.55 (Australia Melbourne) 149.137.40.110 (Singapore) 64.211.144.160 (Brazil) 149.137.68.253 (Mexico) 69.174.57.160 (Canada Toronto) 65.39.152.160 (Canada Vancouver) 207.226.132.110 (Japan Tokyo) 149.137.24.110 (Japan Osaka) Meeting ID: 946 1230 6087 Passcode: 225304 ******************************************************************************** For additional information, please contact Sue Silva at s1silva@umassd.edu
  • Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series
«  6/1 - 6/29  » Download Add to Google Calendar
  • Online Teaching and Learning Strategies
  • Location: Online
  • Contact: CITS Instructional Development
  • Description: A rigorous four-week, fully online certification course that introduces faculty to the current research and best practices for online teaching and learning. Using their own discipline-specific course materials for activities, faculty will work independently, collaboratively with peers from across campus, and with Instructional Designers to design and build one unit of online instruction in a myCourses site. This unit will meet the Quality Online Course Review Rubric criteria and be a model that faculty can reference and replicate as they continue to develop their upcoming fully online course(s).
  • Topical Areas: Faculty Development, Training, Workshop, audience: Faculty, audience: Staff

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