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DTSTART;TZID=America/New_York:20230612T110000
DTEND;TZID=America/New_York:20230612T120000
DTSTAMP:20260404T100821
CREATED:20230605T151800Z
LAST-MODIFIED:20230605T151800Z
UID:10007577-1686567600-1686571200@seasevents.nmsdev7.com
SUMMARY:MEAM Ph.D. Thesis Defense: "High Performance Electroadhesives for Materials and Robots with Electroprogrammable Stiffness"
DESCRIPTION:Materials with electroprogrammable stiffness and adhesion can enhance the performance of robotic systems\, including prosthetics\, medical devices\, wearables\, exoskeletons\, and grippers. However\, achieving large changes in stiffness and adhesive forces in real time is an ongoing challenge. Electroadhesive clutches can rapidly adhere high stiffness elements\, although their low force capacities\, high activation voltages\, and inability to separate and turn off stiffness changes reliably have limited their applications. \nA major challenge in realizing stronger electroadhesive clutches is that current parallel-plate models poorly predict clutch force capacity and cannot be used to design better devices. Thus\, current electroadhesive clutches suffer from force capacities below that of other materials with an electrically-programmable stiffness. Furthermore\, soft material interfaces have not been utilized for stronger electroadhesive clutches due to latent adhesion at the contact interface that prevents programmable release. \nThis work demonstrates strategies to improve electroadhesive clutch designs for high-performance applications in material systems and robots with an electrically-programmable stiffness. Using a fracture mechanics framework\, we build an improved understanding of the relationship between clutch design\, force capacity and contact area. This mechanics-based framework predicts clutch performance across multiple geometries and applied voltages. Based on this approach\, a Coulombic electrostatic clutch with 63 times the force capacity per unit electrostatic force of state-of-the-art electroadhesive clutches is realized. By doing so with traditional dielectrics and electrode materials\, we demonstrate the power of our mechanics-based design methodology to increase clutch performance without relying on expensive materials or intensive manufacturing processes\, making our approach optimal for widespread adoption by robotics researchers. \nFinally\, this mechanics-based design methodology is applied to the design of clutches with soft material interfaces. We demonstrate that this approach in conjunction with an engineered electroadhesive surface enables the use of elastomeric materials and low-voltage ionoelastomers in electroadhesive clutches with increased force capacities\, which are capable of programmable release at reduced device sizes. We utilize these high-performance clutch designs in novel applications with an electrically-programmable stiffness\, including soft robotic hands with enhanced load carrying capacity\, wearable haptic interfaces\, and morphing fabrics.
URL:https://seasevents.nmsdev7.com/event/meam-ph-d-thesis-defense-high-performance-electroadhesives-for-materials-and-robots-with-electroprogrammable-stiffness/
LOCATION:Room 2C8\, David Rittenhouse Laboratory Building\, 209 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Dissertation or Thesis Defense
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230614
DTEND;VALUE=DATE:20230617
DTSTAMP:20260404T100821
CREATED:20230525T163243Z
LAST-MODIFIED:20230525T163243Z
UID:10007570-1686700800-1686959999@seasevents.nmsdev7.com
SUMMARY:5th Annual Learning for Dynamics & Control Conference
DESCRIPTION:Over the next decade\, the biggest generator of data is expected to be devices that sense and control the physical world. \nThe explosion of real-time data that is emerging from the physical world requires a rapprochement of areas such as machine learning\, control theory\, and optimization. While control theory has been firmly rooted in the tradition of model-based design\, the availability and scale of data (both temporal and spatial) will require rethinking the foundations of our discipline. From a machine learning perspective\, one of the main challenges going forward is to go beyond pattern recognition and address problems in data-driven control and optimization of dynamical processes. Our overall goal is to create a new community of people who think rigorously across the disciplines\, ask new questions\, and develop the foundations of this new scientific area. We are happy to welcome you to the University of Pennsylvania for the 5th annual L4DC. Click here for more information. \nRegistration is now open!
URL:https://seasevents.nmsdev7.com/event/5th-annual-learning-for-dynamics-control-conference/
LOCATION:University of Pennsylvania
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230614T103000
DTEND;TZID=America/New_York:20230614T120000
DTSTAMP:20260404T100821
CREATED:20230607T122028Z
LAST-MODIFIED:20230607T122028Z
UID:10007578-1686738600-1686744000@seasevents.nmsdev7.com
SUMMARY:MSE PhD Defense: Effects of Size and Composition on the Performance of Dealloyed Nanoporous Metal Catalysts for CO2 Reduction\, O2 Evolution\, and H2 Generation
DESCRIPTION:
URL:https://seasevents.nmsdev7.com/event/mse-phd-defense-effects-of-size-and-composition-on-the-performance-of-dealloyed-nanoporous-metal-catalysts-for-co2-reduction-o2-evolution-and-h2-generation/
LOCATION:LRSM Reading Room\, 3231 Walnut St.\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Dissertation or Thesis Defense
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230614T110000
DTEND;TZID=America/New_York:20230614T120000
DTSTAMP:20260404T100821
CREATED:20230601T133829Z
LAST-MODIFIED:20230601T133829Z
UID:10007573-1686740400-1686744000@seasevents.nmsdev7.com
SUMMARY:Department of Bioengineering Juneteenth Address: "A White Neighbor\, a Black Surgeon\, and a Mormon Computer Scientist Walk into a Bar…” (Kevin B. Johnson)
DESCRIPTION:“A White Neighbor\, a Black Surgeon\, and a Mormon Computer Scientist Walk into a Bar…” \nAs we recognize Juneteenth\, a holiday that brings awareness to what journalist Corey Mitchell calls “…a complex understanding of the nation’s past”\, we also need to understand  how many of our neighbors\, staff\, and faculty—even those born in the last 100 years—continue to navigate through the environment that made Juneteenth remarkable.  Dr. Johnson will share a bit of his personal story and how this story informs his national service and passion for teaching. \nThis talk will be held live in person in Berger Auditorium (Skirkanich Hall basement)\, streamed on Zoom\, and recorded. \nFollowing the event\, a limited number of box lunches will be available for in-person attendees. If you would like a box lunch\, please RSVP here so we can get an accurate headcount. \nJoin Zoom Meeting\nhttps://upenn.zoom.us/j/92503256013?pwd=amZKL1V0RUtYbnFjbHJEZXZEV01xZz09 \nMeeting ID: 925 0325 6013\nPasscode: 801060
URL:https://seasevents.nmsdev7.com/event/department-of-bioengineering-juneteenth-address/
LOCATION:Berger Auditorium (Room 13)\, Skirkanich Hall\, 210 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Faculty,Diversity, Equity and Inclusion
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230615T100000
DTEND;TZID=America/New_York:20230615T120000
DTSTAMP:20260404T100821
CREATED:20230526T152348Z
LAST-MODIFIED:20230526T152348Z
UID:10007571-1686823200-1686830400@seasevents.nmsdev7.com
SUMMARY:BE Doctoral Dissertation Defense: "Detecting and Localizing Progressive Changes In Longitudinal MRI of the Hippocampal Region in Alzheimer’s Disease" (Mengjin Dong)
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Dr. Paul Yushkevich are pleased to announce the Doctoral Dissertation Defense of Mengjin Dong.\n \nTitle: Detecting and Localizing Progressive Changes In Longitudinal MRI of the Hippocampal Region in Alzheimer’s Disease\n \nDate:                         Thursday\, June 15th\, 2023\nTime:                         10:00 am\nLocation:                    Biomedical Research Building (BRB)\, Classroom 0252 and Zoom.\n \nGoogle Maps of BRB:\nhttps://www.google.com/maps/place/Biomedical+Research+Building+(BRB)/@39.9480917\,-75.1985746\,17z/data=!3m1!4b1!4m6!3m5!1s0x89c6c65ec9dc0937:0x276d01d621dbae62!8m2!3d39.9480917!4d-75.1963859!16s%2Fg%2F11bwnd8dc7\n \nZoom Meeting ID:      461 034 1415\nZoom Link:              https://upenn.zoom.us/j/4610341415 \n\nThe public is welcome to attend.
URL:https://seasevents.nmsdev7.com/event/be-doctoral-dissertation-defense-detecting-and-localizing-progressive-changes-in-longitudinal-mri-of-the-hippocampal-region-in-alzheimers-disease-mengjin-dong/
LOCATION:BRB 0252
CATEGORIES:Doctoral,Graduate,Student,Dissertation or Thesis Defense
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230616T100000
DTEND;TZID=America/New_York:20230616T110000
DTSTAMP:20260404T100821
CREATED:20230602T164906Z
LAST-MODIFIED:20230602T164906Z
UID:10007576-1686909600-1686913200@seasevents.nmsdev7.com
SUMMARY:MEAM Ph.D. Thesis Defense: "Photophoretic Light-flyers for Mesospheric Applications"
DESCRIPTION:The Earth’s mesosphere plays a crucial role in weather forecasting\, environmental conservation\, and planetary exploration. However\, traditional unmanned aerial vehicles (UAVs) such as balloons or spacecraft face significant challenges when attempting to access this layer. Balloons and airplanes struggle due to the low pressure\, while satellites encounter high aerodynamic drag. To overcome these limitations\, we have developed a photophoresis-based UAV capable of levitating in the Earth’s mesosphere for an extended duration of days or even months. Photophoresis refers to the movement of small particles suspended in fluids when illuminated by an intense beam of light. This phenomenon can be attributed to a difference in heat exchange of a particle illuminated in gases or liquids. Our research focuses on the levitation of mylar-based light-flyers utilizing the photophoretic force driven by the difference in the thermal accommodation coefficient (TAC). These levitations ultimately occur under light irradiances comparable to natural sunlight (1.36 kW/m2). \nOur work encompasses several key contributions. First\, we proposed a guideline to minimize the ground effect associated with testing in a vacuum chamber\, ensuring realistic performance evaluations of light-flyers. Second\, we utilized germanium coatings as selective absorbers to achieve levitation at irradiances as low as 1.5 kW/m2 with minimal ground effect. Third\, we revised the previous semi-empirical model that underlies the photophoretic force based on our experimental observations. Finally\, we predicted successful levitations of light-flyers in a mesosphere-like environment under natural sunlight\, accommodating sub-milligram payloads. Overall\, our study represents a significant advancement towards launching long-life UAVs into Earth’s mesosphere\, which can offer substantial benefits to atmospheric science.
URL:https://seasevents.nmsdev7.com/event/meam-ph-d-thesis-defense-photophoretic-light-flyers-for-mesospheric-applications/
LOCATION:Lynch Lecture Hall\, Cret Wing\, CHEM\, 231 S. 34th Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Dissertation or Thesis Defense
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
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