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DTSTART;TZID=America/New_York:20230925T153000
DTEND;TZID=America/New_York:20230925T163000
DTSTAMP:20260404T032315
CREATED:20230925T130519Z
LAST-MODIFIED:20230925T130519Z
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SUMMARY:CBE Seminar: "Design of Solid-state Nanomaterials for Electrocatalysis: A Case Study of Oxygen Evolution Reaction Electrocatalysts" (Yang\, UIUC)
DESCRIPTION:High-level control of atomic and surface structures is a hallmark of the application of nanomaterials in a range of electrochemical and electrocatalytic devices\, such as water electrolyzer. They play critical roles in our effort to develop energy conversion and storage technologies that have net zero carbon impacts. Nanostructured metal oxides made for catalyzing the oxygen evolution reaction (OER) is one representative example. Unlike the traditional heterogeneous catalysis\, both bulk and surface properties are important in the design of active and durable electrocatalysts. This is because besides the adsorbate evolution mechanism (AEM)\, lattice oxygen mechanism (LOM) is often involved in the catalytic cycle. In this talk\, I will present our recent work on the synthesis-structure-electrocatalytic property relationship of complex oxides that can be described in a generic formula of AxByOz\, where A and B can be a single metal cation or mixed cations located at a given lattice site. We haveexamined several archetypes of oxide structures\, including perovskite\, pyrochlore\, spinel\, and Ruddlesden-Popper (RP) phasecompounds and their site-mixed solids\, all of which are found to be active for OER under either acid or base conditions. Ourresults indicate defect engineering in these solids is particularly important for OER catalysis. Thus\, it is essential\, besides agood understanding of heterogeneous catalysis\, one needs to take a solid state chemistry view in order to uncovering thecatalyst design for optimal performance. How to regulate the cation sites and oxygen defect chemistry for enhancing the bondand lattice stability of key structural constituents can be important. The new understandings should inform the approach tothe fabrication of earth-abundant oxide electrocatalysts for hydrogen production and utilization.
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-design-of-solid-state-nanomaterials-for-electrocatalysis-a-case-study-of-oxygen-evolution-reaction-electrocatalysts-yang-uiuc/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230925T160000
DTEND;TZID=America/New_York:20230925T173000
DTSTAMP:20260404T032315
CREATED:20230912T160815Z
LAST-MODIFIED:20230912T160815Z
UID:10007690-1695657600-1695663000@seasevents.nmsdev7.com
SUMMARY:LSRM Presents The Robert Maddin Lecture in Materials Science: "Active & Adaptive Matter Driving Cell Dynamics"
DESCRIPTION:Control of shape and movement is essential for cell physiology\, from cell migration to control of tissue shape. The mechanical behaviors of living cells are controlled by materials constructed by protein-based assemblies within the cell interior.  These soft materials both regulate how forces generated by individual mechanoenzymes are transmitted to cell and tissue scales as well as how mechanical properties evolve\, or adapt\, over time to allow for smooth transitions. I will describe my lab’s recent efforts to understand the design principles of the active\, soft materials that drive multi-cellular dynamics.  In particular\, I will describe our progress to reveal design principles by which the actin cytoskeleton senses\, generates\, and adapts to mechanical force.  Hopefully\, I will convince you that the materials within cells provide a rich playground to understand design principles of active and adaptive soft materials.
URL:https://seasevents.nmsdev7.com/event/lsrm-presents-the-robert-maddin-lecture-in-materials-science-active-adaptive-matter-driving-cell-dynamics/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Distinguished Lecture
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230926T100000
DTEND;TZID=America/New_York:20230926T113000
DTSTAMP:20260404T032315
CREATED:20230821T221557Z
LAST-MODIFIED:20230821T221557Z
UID:10007641-1695722400-1695727800@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Defending the Planet: The DART Mission\, and Mechanics Among the Asteroids"
DESCRIPTION:An on-orbit demonstration of asteroid deflection is a key test of our ability to defend the planet from an incoming asteroid. The recent DART (Double Asteroid Redirection Test) mission was NASA’s demonstration of kinetic impactor technology\, impacting an asteroid to adjust its speed and path. The DART spacecraft impacted the asteroid Dimorphos on September 26\, 2022\, and was the first-ever space mission to demonstrate asteroid deflection by a kinetic impactor. We discuss the mission\, and the critical role that mechanics plays in such planetary defense missions. \nMost asteroids are “small” rocky bodies (they can vary in size from sub-m to several hundred km). The structure and surface topography of asteroids are determined by impact and fracture processes that occur over an immense range of timescales. Recent observations have demonstrated that many small asteroids are “rubble-piles\,” collections of rocks held together by gravity. What determines this structure? We examine the disruption and breakdown of asteroids by studying the multiscale mechanics of dynamic fracture and fragmentation\, coupled with computational simulations of gravitational re-accumulation. The critical mechanisms are addressed through fundamental high-strain-rate experiments\, high-speed visualization\, theoretical and computational modeling of failure processes\, and computational simulations of asteroid damage and disruption. Our focus is on the relative roles of impact and thermal loading on the nature of near-Earth asteroids (NEAs) that may potentially impact the Earth.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-defending-the-planet-the-dart-mission-and-mechanics-among-the-asteroids/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230926T110000
DTEND;TZID=America/New_York:20230926T120000
DTSTAMP:20260404T032315
CREATED:20230829T194932Z
LAST-MODIFIED:20230829T194932Z
UID:10007653-1695726000-1695729600@seasevents.nmsdev7.com
SUMMARY:ESE Fall Seminar - "Large Observational Study of the Causal Effects of a Nudge and the Geometry of Causality"
DESCRIPTION:Nudges are interventions promoting healthy behavior without forbidding options or significant incentives. As an example of a nudge\, the Apple Watch encourages users to stand by delivering a notification if they have been sitting for the first 50 minutes of an hour. \nBased on 76 billion minutes of observational standing data from 160\,000 subjects in the public Apple Heart and Movement Study\, amount of data in the field that makes this work one of the largest ever in the subject\, we estimate the causal effect of this notification using a novel regression discontinuity design for time-series data with time-varying treatment. We show that the nudge increases the probability of standing by up to 44%\, a very significant effect compared to what has been reported in the literature\, remaining effective with time\, even after almost 2 years. The nudge’s effectiveness increases with age\, and it is independent of gender. Closing Apple Watch Activity Rings\, a visualization of participants’ daily progress in Move\, Exercise\, and Stand\, further increases the nudge’s impact. We conclude the presentation with some recent work on connections between geometry and causal inference. \nThe first part of the presentation is joint work with Achille Nazaret while the second is with Amir Farzam and Allen Tannenbaum.
URL:https://seasevents.nmsdev7.com/event/ese-fall-seminar-title-tbd-3/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230926T130000
DTEND;TZID=America/New_York:20230926T150000
DTSTAMP:20260404T032315
CREATED:20230913T165726Z
LAST-MODIFIED:20230913T165726Z
UID:10007693-1695733200-1695740400@seasevents.nmsdev7.com
SUMMARY:ESE PhD Thesis Defense: "Control of Multi-Contact Systems via Local Hybrid Models"
DESCRIPTION:For many important tasks such as manipulation and locomotion\, robots need to make and break contact with their environment. Although such multi-contact systems are common\, they pose a significant challenge when it comes to analysis and control. This thesis exploits the local hybrid structure of such problems and presents scalable and fast algorithmic solutions. First\, we present an MPC framework for multi-contact systems. The method is based on the alternating direction method of multipliers (ADMM) and is capable of high-speed reasoning over potential contact events. Then\, we focus on utilizing tactile measurements for reactive control\, which is very natural yet underexplored in the robotics community. We propose a control framework to design provably stabilizing tactile feedback policies by exploiting the local complementarity structure of contact dynamics. Lastly\, inspired by the connection between rectified linear unit (ReLU) activation functions and linear complementarity problems\, we present a method to analyze stability of multi-contact systems in feedback with ReLU network controllers.
URL:https://seasevents.nmsdev7.com/event/ese-phd-thesis-defense-control-of-multi-contact-systems-via-local-hybrid-models/
LOCATION:Room 35\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Dissertation or Thesis Defense
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230926T140000
DTEND;TZID=America/New_York:20230926T150000
DTSTAMP:20260404T032315
CREATED:20230921T132132Z
LAST-MODIFIED:20230921T132132Z
UID:10007699-1695736800-1695740400@seasevents.nmsdev7.com
SUMMARY:Fall 2023 GRASP Seminar: Paul Debevec\, Eyeline Studios Powered by Netflix\, “From Virtual Cinematographhy to Virtual Production”
DESCRIPTION:*This seminar will be held in-person in Levine 307 as well as virtually via Zoom. The seminar will NOT be recorded. \nABSTRACT\nThis talk will describe how virtual cinematography techniques developed at UC Berkeley for image-based modeling\, rendering\, and lighting helped enable iconic visual effects sequences in movies such as The Matrix\, X-Men\, Spider-Man 2\, Benjamin Button\, and Avatar. It will also show how real-world image-based lighting techniques which surround actors with computer-controlled LED’s have led to new virtual production techniques seen in The Social Network\, Gravity\, Rogue One\, Asura\, and The Mandalorian. The talk will conclude by describing new research to improve the lighting reproduction\, color rendition\, and alpha compositing capabilities of these new virtual production stages.
URL:https://seasevents.nmsdev7.com/event/fall-2023-grasp-seminar-paul-debevec-eyeline-studios-powered-by-netflix-from-virtual-cinematographhy-to-virtual-production/
LOCATION:Levine 307\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
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:20230927T120000
DTEND;TZID=America/New_York:20230927T131500
DTSTAMP:20260404T032315
CREATED:20230911T150435Z
LAST-MODIFIED:20230911T150435Z
UID:10007683-1695816000-1695820500@seasevents.nmsdev7.com
SUMMARY:ASSET Seminar: "Safety through Agility - Safe and Performant Control for Learning-Enabled Autonomous Systems" (Mangharam\, Penn)
DESCRIPTION:ABSTRACT:  \nWe present three approaches to combine formal methods\, control theory\, and machine learning for safe and performant autonomous systems.  \n\nSafe control for learning-enabled systems: We present our recent progress on how to learn safe adaptive behavior for highly interactive multi-agent systems. We will introduce how to quantify the uncertainty of closed-loop control systems using a frequentist method called conformal prediction and incorporate the uncertainty for safe perception-based control.\nLearning Introspective Control: Oftentimes the systems that we control operate under different conditions due to changing environments\, varying system parameters or changes in payload. As such\, we strive to develop computationally efficient\, data-driven system models that allow predictive controllers to adapt to changes in the environment in real-time. We focus on using Gaussian Processes as models to study the problem in the context of driving on surfaces with changing friction coefficients. \nDifferentiable Predictive Control: Finally\, we discuss the application of differentiable predictive control for large-scale urban road networks.\n\n  \n 
URL:https://seasevents.nmsdev7.com/event/asset-seminar-safe-control-for-learning-enabled-autonomous-systems-rahul-mangharam-penn/
LOCATION:Levine 307\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="AI-enabled Systems%3A Safe%2C Explainable%2C and Trustworthy (ASSET) Center":MAILTO:asset-info@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230927T150000
DTEND;TZID=America/New_York:20230927T160000
DTSTAMP:20260404T032315
CREATED:20230911T154907Z
LAST-MODIFIED:20230911T154907Z
UID:10007685-1695826800-1695830400@seasevents.nmsdev7.com
SUMMARY:Fall 2023 GRASP SFI: Robert Baines\, ETH Zürich\, "Material system design for predictable shape-morphing robots"
DESCRIPTION:This is a hybrid event with in-person attendance in Levine 307 and virtual attendance on Zoom. This week’s speaker will be virtual.  \nABSTRACT\nRobots are traditionally designed with immutable physical hardware and control policies that make them specialized for repetitive\, structured tasks and environments. This talk presents work toward robots that actively change shape to accomplish a variety of tasks in diverse environments. Shape-changing robots are pursued at two levels. First\, I will discuss the design and modeling of shape-morphing components\, including variable stiffness materials and variable-trajectory soft actuators. Component-level analysis leads to insight into how actively tunable stiffness differentials can yield myriad deformations. Inverse models that recapitulate shape-morphing components’ highly nonlinear geometric and material behavior allow for systematic mechanical programming of shape-morphing robotic function. These foundational studies inform the second part of the talk\, in which I will discuss how shape-morphing components are applied to create an adaptive amphibious quadruped robot. Harnessing active stiffness-tuning materials\, the robot features limbs that switch between programmed shapes for effective propulsion in multiple environments. The robot testifies to the efficacy of “adaptive morphogenesis\,” a design strategy that leverages shape-morphing and gait adaptability to improve performance across multiple environments.
URL:https://seasevents.nmsdev7.com/event/fall-2023-grasp-sfi-robert-baines/
LOCATION:Levine 307\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
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:20230928T110000
DTEND;TZID=America/New_York:20230928T120000
DTSTAMP:20260404T032315
CREATED:20230730T155426Z
LAST-MODIFIED:20230730T155426Z
UID:10007618-1695898800-1695902400@seasevents.nmsdev7.com
SUMMARY:MSE David P. Pope Distinguished Lecture: "Light\, Materials and Interfaces: The Complex Dance That Allows CLIP-based 3D Printing\," Stanford University
DESCRIPTION:Abstract\nThe production of polymer products relies largely on age-old molding techniques. A major reason for this is that additive methods have not delivered meaningful alternatives to traditional processes—until now. In this talk\, I will describe Continuous Liquid Interface Production (CLIP) technology\, which embodies a convergence of advances in software\, hardware\, and materials to bring the digital revolution to polymer additive manufacturing. CLIP uses software-controlled chemistry to produce commercial quality parts rapidly and at scale by capitalizing on the principle of oxygen-inhibited photopolymerization to generate a continual liquid interface of uncured resin between a forming part and a printer’s exposure window. Instead of printing layer-by-layer\, this allows layerless parts to ‘grow’ from a pool of resin\, formed by light. Compatible with a wide range of polymers\, CLIP opens major opportunities for innovative products across diverse industries. Previously unmakeable products are already manufactured at scale with CLIP\, including the large-scale production of running shoes by Adidas (Futurecraft 4D); mass-customized football helmets by Riddell; the world’s first FDA-approved 3D printed dentures; and numerous parts in automotive\, consumer electronics\, and medicine. At Stanford\, we are pursuing new advances including digital therapeutic devices in pediatric medicine\, new multi-materials printing approaches\, recyclable materials\, and the design of a high-resolution printer to advance technologies in the microelectronics and drug/vaccine delivery areas\, including novel microneedle designs as a potent vaccine delivery platform.
URL:https://seasevents.nmsdev7.com/event/mse-david-p-pope-distinguished-lecture-light-materials-and-interfaces-the-complex-dance-that-allows-clip-based-3d-printing-stanford-university/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Distinguished Lecture
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230929T100000
DTEND;TZID=America/New_York:20230929T110000
DTSTAMP:20260404T032315
CREATED:20230915T160832Z
LAST-MODIFIED:20230915T160832Z
UID:10007694-1695981600-1695985200@seasevents.nmsdev7.com
SUMMARY:MEAM Ph.D. Thesis Defense: "A Study of Hydrogel Mechanics with Application on the Fracture of Human Blood Clots"
DESCRIPTION:Loading of biological and synthetic hydrogels involves large deformations\, and there exists a large literature devoted to their experimental characterization. Analytical investigations have recognized the importance of contributions originating from the liquid phase\, and experiments have verified them. The liquid flux fields in these materials usually exhibit fully three-dimensional profiles and are time-dependent. This coupled mechanical-diffusional poroelastic problem is studied here within the framework of continuum poro-elasticity and presents an abundance of interesting phenomena. One such interesting observation in many experiments is the tendency of some hydrogel materials to expel liquid under tension. This behavior is well-documented in biologically swollen tissues\, but it appears to be absent from a majority of synthetic hydrogels which exhibit the more common behavior of absorbing liquid under tension. In this thesis the poro-elastic fracture of hydrogel materials is studied and the energy release rate\, a fundamental quantity of fracture mechanics\, is computed. Liquid flow is shown to contribute significantly to fracture\, and it can be utilized to design tough hydrogels. \nBeyond the theoretical investigations\, continuum poroelasticity is applied to the fracture behavior of human blood clots whose main component is a fibrin gel. Fibrin is a blood clotting protein and the main structural components of clots and thrombi. Different fibrin(ogen) concentrations\, types of loading (tension and shear)\, and geometries are used to study the dependencies of the toughness on the fibrin(ogen)\, showing that fracture toughness increases with fibrin(ogen) concentration. The poroelastic constitutive model used\, incorporating the intricate fibrin fiber mechanics\, captures well the experimental data. Insights for the microstructural process happening during fracture are provided through a combination of finite element results and microscopy imaging.
URL:https://seasevents.nmsdev7.com/event/meam-ph-d-thesis-defense-a-study-of-hydrogel-mechanics-with-application-on-the-fracture-of-human-blood-clots/
LOCATION:DRLB A6\, 209 S. 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;TZID=America/New_York:20230929T100000
DTEND;TZID=America/New_York:20230929T110000
DTSTAMP:20260404T032315
CREATED:20230918T144017Z
LAST-MODIFIED:20230918T144017Z
UID:10007697-1695981600-1695985200@seasevents.nmsdev7.com
SUMMARY:PRECISE Seminar: Network Intelligence Role in Future Mobility
DESCRIPTION:
URL:https://seasevents.nmsdev7.com/event/precise-seminar-network-intelligence-role-in-future-mobility/
LOCATION:Levine 307\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="PRECISE":MAILTO:wng@cis.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230929T103000
DTEND;TZID=America/New_York:20230929T114500
DTSTAMP:20260404T032315
CREATED:20230905T135045Z
LAST-MODIFIED:20230905T135045Z
UID:10007668-1695983400-1695987900@seasevents.nmsdev7.com
SUMMARY:Fall 2023 GRASP on Robotics: Stefano Soatto\, AWS & UCLA\, "Toward Foundational Models of Physical Scenes: From Large Language Models to World Models and Back"
DESCRIPTION:This is a hybrid event with in-person attendance in Wu and Chen and virtual attendance on Zoom. \nABSTRACT\nNow that a significant fraction of human knowledge has been shared through the Internet\, scraped and squashed into the weights of Large Language Models (LLMs)\, do we still need embodiment and interaction with the physical world to build representations? Is there a dichotomy between LLMs and “large world models”? What is the role of visual perception in learning such models? Can perceptual agents trained by passive observation learn world models suitable for control? \nTo begin tackling these questions\, I will first address the issue of controllability of LLMs. LLMs are stochastic dynamical systems\, for which the notion of controllability is well established: The state (“of mind”) of an LLM can be trivially steered by a suitable choice of input given enough time and memory. However\, the space of interest for control of an LLM is not that of words\, but that of “meanings” expressible as sentences that a human could have spoken and would understand. Unfortunately\, unlike controllability\, the notions of meaning and understanding are not usually formalized in a way that is relatable to LLMs in use today. \nI will propose a simplistic definition of meaning that reflects the functional characteristics of a trained LLM. I will show that a well-trained LLM establishes a topology in the space of meanings\, represented by equivalence classes of trajectories of underlying dynamical model (LLM). Then\, I will describe both necessary and sufficient conditions for controllability in such a space of meanings. \nI will then highlight the relation between meanings induced by a trained LLM upon the set of sentences that could be uttered\, and “physical scenes” underlying sets of images that could be observed. In particular\, a physical scene can be defined uniquely and inferred as an abstract concept without the need for embodiment\, a view aligned with J. Koenderink’s characterization of images as “controlled hallucinations.” \nLastly\, I will show that popular models ostensibly used to represent the 3D scene (Neural Radiance Fields\, or NeRFs) can at most represent the images on which they are trained\, but not the underlying physical scene. However\, composing a NeRF with a Latent Diffusion Model or other inductively-trained generative model yields a viable representation of the physical scene. Such a model class\, which can be learned through passive observations\, is a first albeit rudimentary Foundational Model of physical scenes in the sense of being sufficient for any downstream inference task based on visual data.
URL:https://seasevents.nmsdev7.com/event/fall-2023-grasp-on-robotics-stefano-soatto-aws-ucla-toward-foundational-models-of-physical-scenes-from-large-language-models-to-world-models-and-back/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="General Robotics%2C Automation%2C Sensing and Perception (GRASP) Lab":MAILTO:grasplab@seas.upenn.edu
END:VEVENT
END:VCALENDAR