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DTSTART;TZID=America/New_York:20210928T100000
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DTSTAMP:20260406T165100
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SUMMARY:MEAM Seminar: "Kirigami: Programming Cutting and Folding from Microscale to Meter Scale"
DESCRIPTION:Programmable shape-shifting materials can take different physical forms to achieve multifunctionality in a dynamic and controllable manner. By introducing holes and cuts in 2D sheets\, we demonstrate dramatic color and shape change and super-conformability via collapsing or expanding of the hole arrays in the micro- and macroscales. When choosing the cuts and geometry correctly\, we show folding into the third dimension\, known as kirigami. By programming the geometry of cuts and folding angles\, we explore their potential applications in water harvesting\, super-stretchable and shape conformable medical devices.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-kirgami-programming-cutting-and-folding-from-microscale-to-meter-scale/
LOCATION:Zoom – Email MEAM for Link\, peterlit@seas.upenn.edu
CATEGORIES:Seminar
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210929T153000
DTEND;TZID=America/New_York:20210929T163000
DTSTAMP:20260406T165100
CREATED:20210812T182641Z
LAST-MODIFIED:20210812T182641Z
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SUMMARY:CBE Seminar: "Shake It Off: Dynamics of Bacterial Adhesions at Interfaces"
DESCRIPTION:Abstract \nControl over adhesion of bacteria on solid and liquid interfaces underlies a spectrum of practical applications\, ranging from preventing the formation of destructive biofilms on medical devices and on resource pipelines to removing pollutants from water. Because microscale bacteria are similar in size to colloidal particles\, bacterial adhesion has long been studied using models for colloidal deposition. Many bacteria\, however\, are active and can move\, swim\, tumble\, and rotate near interfaces. This activity\, not captured in models for deposition of passive colloids\, must affect how bacteria deposit onto surfaces. Here\, I will describe work exploring effects of motility on adhesion to solid substrates and to liquid-liquid interfaces. On solid surfaces\, we relate near-surface mobility and adhesion to surface properties using imaging; engineer bacteria to identify surface adhesions that control transient mobility; and apply insights from these studies to design responsive polymer brush surfaces that detach adherent bacteria. On liquid-liquid interfaces\, we test the applicability of thermodynamic pictures for adhesion of non-motile bacteria on oil droplets; identify how bacterial swimming alters this adhesion; and show that motile adhered bacteria can drive droplet rotation.
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-shake-it-off-dynamics-of-bacterial-adhesions-at-interfaces/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210930T120000
DTEND;TZID=America/New_York:20210930T133000
DTSTAMP:20260406T165100
CREATED:20210824T180524Z
LAST-MODIFIED:20210824T180524Z
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SUMMARY:ODEI Spotlight: Promoting LGBTQ+ Inclusivity
DESCRIPTION:Are you looking for a way to expand your understanding of what it means to be a member of LGBTQ+ communities? Do you feel uneducated in conversations surrounding LGBTQ+ language and preferred terms? Join us for this interactive session which provides participants with an overview of LGBTQ+ history\, terms\, and current issues. It is a chance to expand your understanding of what it means to be a member of LGBTQ+ communities and gain tangible tips on how you can check implicit biases and effectively engage with and support those who identify within the queer community. Lunch will be provided (gluten-free and vegan options available). Registration required.
URL:https://seasevents.nmsdev7.com/event/odei-spotlight-promoting-lgbtq-inclusivity/
LOCATION:PA
CATEGORIES:Diversity, Equity and Inclusion
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20210930T140000
DTEND;TZID=America/New_York:20210930T150000
DTSTAMP:20260406T165100
CREATED:20210920T182740Z
LAST-MODIFIED:20210920T182740Z
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SUMMARY:MEAM PhD Thesis Defense: "A Differential Homogenization Framework for Precipitation-Strengthened Metals"
DESCRIPTION:Composite materials\, such as metal- and polymer-matrix composites\, exhibit both elastic and dissipative effects when subjected to macroscopic loadings. Even when the phases of the composite are characterized by a simple Maxwell rheology\, the complex viscoelastic interactions between the phases give rise to emergent behavior at the macroscopic scale. Incorporating these “long-memory” effects in the context of analytical homogenization is the subject of this thesis. \nIn particular\, I will present a novel differential homogenization framework for particulate composites comprised of elasto-viscoplastic strain-hardening phases that incorporates first and second-moment information about the local hardening fields and improves upon existing formulations which only consider the corresponding first moments. The present framework is motivated by precipitation-strengthened alloys\, which constitute a commercially important class of whose mechanical properties can be altered by introducing stiff precipitates into the bulk (matrix) through heat-treatment. \nFirst\, we’ll consider the simple case of linear viscoelasticity and show that by using differential equations instead of difference equations\, the new formulation is more robust than earlier approaches and recovers exact results for certain classes of composites. \nNext\, we provide estimates for creeping single crystals with elastic particles and find that the long-memory effect manifests as a transient creep-rate which is strongly dependent on the elasticity of the phases as well as the morphology of the particles. We also find that the timescales associated with macroscopic creep are strongly dependent on crystal symmetry as well as the loading configuration. \nLastly\, we examine the effect of microstructure on the effective behavior of precipitation-strengthened crystals. It is found that overall\, stiff precipitates induce larger levels of slip-activity and work-hardening\, relative to a corresponding homogeneous crystal. For FCC crystals\, the precipitate stiffness plays a significant role in modulating the overall anisotropy\, while for HCP crystals the overall anisotropy is mostly affected by the viscous and hardening anisotropies. Moreover\, it is found that incorporating the second-moments of the local hardening fields is important for generating accurate predictions\, particularly at large deformations.
URL:https://seasevents.nmsdev7.com/event/meam-phd-thesis-defense-a-differential-homogenization-framework-for-precipitation-strengthened-metals/
LOCATION:Zoom – Email MEAM for Link\, peterlit@seas.upenn.edu
CATEGORIES:Doctoral,Dissertation or Thesis Defense
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20211001T103000
DTEND;TZID=America/New_York:20211001T114500
DTSTAMP:20260406T165100
CREATED:20210927T194644Z
LAST-MODIFIED:20210927T194644Z
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SUMMARY:Fall 2021 GRASP Seminar: Rahul Mangharam\, University of Pennsylvania\, “What can we learn from Autonomous Racing?”
DESCRIPTION:*This will be a HYBRID Event with in-person attendance in Wu & Chen Auditorium and Virtual attendance via Zoom here.  \nBalancing performance and safety are crucial to deploying autonomous vehicles in multi-agent environments. In particular\, autonomous racing is a domain that penalizes safe but conservative policies\, highlighting the need for robust\, adaptive strategies. Current approaches either make simplifying assumptions about other agents or lack robust mechanisms for online adaptation. In this talk\, we will explore research themes on perception\, planning and control at the limits of performance. We explore (1) How to build the most efficient autonomous racecar with Multi-domain optimization across vehicle design\, planning and control; (2) How to generate the most competitive agents who dynamically balance safety and assertiveness by using distributionally robust online adaptation; (3) How to stress test the overtaking logic and path planning algorithms in interactive adversarial agents; (4) How to combine previous system designs to auto-complete new designs with new requirements\, and (5) Understand the value of Cooperation in Multi-Agent Games. We realize all our research in the https://f1tenth.org autonomous racecar platform that is 10th the size\, but 10x the fun! The main takeaway from this talk is how you can get involved in very exciting research on safe autonomous systems.  This is a team presentation by Rahul Mangharam\, Johannes Betz and Billy Zheng.
URL:https://seasevents.nmsdev7.com/event/fall-2021-grasp-seminar-rahul-mangharam-university-of-pennsylvania-what-can-we-learn-from-autonomous-racing/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="General Robotics%2C Automation%2C Sensing and Perception (GRASP) Lab":MAILTO:grasplab@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20211001T130000
DTEND;TZID=America/New_York:20211001T140000
DTSTAMP:20260406T165100
CREATED:20210824T180950Z
LAST-MODIFIED:20210824T180950Z
UID:10006866-1633093200-1633096800@seasevents.nmsdev7.com
SUMMARY:ODEI Spotlight: Career Services Q&A zoom session for International Students
DESCRIPTION:Are you an international student at Penn with questions about your resume\, cover letters\, interviewing\, LinkedIn\, using Handshake\, finding opportunities\, career fairs\, virtual interviews\, networking\, negotiations\, or other job search topics? Join this informal zoom session where Jillian Cener\, Associate Director of Penn Career Services\, will answer your questions and have a discussion with the group. Many of you probably have some of the same questions\, so we can go over resources together. \nPlease RSVP to attend.
URL:https://seasevents.nmsdev7.com/event/odei-spotlight-career-services-qa-zoom-session-for-international-students/
LOCATION:PA
CATEGORIES:Diversity, Equity and Inclusion
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