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DTSTART;TZID=America/New_York:20230207T100000
DTEND;TZID=America/New_York:20230207T113000
DTSTAMP:20260405T015004
CREATED:20230125T205356Z
LAST-MODIFIED:20230125T205356Z
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SUMMARY:MEAM Seminar: "Designing Interfacial Phenomena for Water\, Energy\, and Sustainability"
DESCRIPTION:Solid/water interfacial phenomena are pervasive in both natural and built environments. Heat exchangers\, membrane pores\, and packed bed reactors are all examples of solid/water interfaces where interfacial phenomena and small-scale fluid physics can have outsized influences on process efficacy and sustainability. Even innocuous surfaces such as reactor walls are not inert and can actively interact with aqueous solutions and thereby create inefficiencies. Surface properties are crucial in controlling and reducing such inefficiencies. New tools and techniques in the fields of micro/nano-fabrication\, thin film deposition\, and soft matter physics have enabled unprecedented capability to manufacture engineered interfaces. By precisely designing the composition\, chemistry\, and microscopic geometry of interfaces\, it is possible to go beyond simply selecting the best available material for a given application. Instead\, we can specifically design surfaces and processes for fine-tuned control over interfacial phenomena to achieve drastic reduction\, or even complete elimination\, of inefficiencies. Here\, three examples in which interfacial engineering can enable new paradigms for water\, energy\, and sustainability will be presented. I will show that composite liquid/solid surface can eliminate mineral fouling for improved material resilience\, that nano-engineered materials can induce ejection of foulant crystals with potential application for heat transfer and waste brine management\, and that multiphase microfluidics with controlled pore geometries can enable new separation processes.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-designing-interfacial-phenomena-for-water-energy-and-sustainability/
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:20230207T150000
DTEND;TZID=America/New_York:20230207T160000
DTSTAMP:20260405T015004
CREATED:20230119T163631Z
LAST-MODIFIED:20230119T163631Z
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SUMMARY:Spring 2023 GRASP Seminar: Henry Fuchs\, UNC Chapel Hill\, "Augmented Reality Glasses: a 50-year Adventure"
DESCRIPTION:This is an in-person only event with attendance in Raisler Lounge (Towne 225). The presenter will be in-person as well. \nABSTRACT\nMany of us foresee of a future in which AR eyeglasses are worn all day\, replacing of our current prescription eyewear. That future may not arrive for a while and predicting its benefits and problems may be as premature as early predictions about the use of mobile phones or about “a helicopter in every garage.” Nevertheless\, a few sample applications seem both obvious and promising\, 1) continuous physiological monitoring for sudden and long-term health changes\, and 2) virtually embodied avatars for guidance in navigation\, exercise\, and training. I will also talk about the rocky history of head-worn AR systems\, which in contrast to the amazing\, continuous advances in Integrated Circuit fabrication technology\, has gone through multiple bust and boom cycles. I will talk about a few of the historic obstacles and how some were overcome and others side-stepped. I will summarize a few of the remaining problems\, possible paths to their solution\, and describe several of our projects in these areas.
URL:https://seasevents.nmsdev7.com/event/spring-2023-grasp-seminar-henry-fuchs/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd 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:20230208T120000
DTEND;TZID=America/New_York:20230208T133000
DTSTAMP:20260405T015004
CREATED:20230104T183022Z
LAST-MODIFIED:20230104T183022Z
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SUMMARY:ASSET Seminar: Using Large Language Models to Build Explainable Classifiers\, Chris Callison-Burch (University of Pennsylvania)
DESCRIPTION:ABSTRACT: \nI’ll present research on using large language models (LLMs) to build explainable classifiers.   I will show off work from my PhD students and collaborators on several recent research directions: \n\nImage classification with explainable features  (https://arxiv.org/abs/2211.11158)\nText classification with explainable features (work in progress)\nThe importance of faithfulness in explanations (https://arxiv.org/abs/2209.11326)\n(Time permitting) A faithful “chain of thought” LLM reasoner that produces code in its explanations (https://arxiv.org/abs/2301.13379)\n\nHere’s an example of the automatically generated concepts that we use for image classification in the first \nThe papers that I’ll present are joint work with:\nAdam Stein\, Ajay Patel\, Ansh Kothary\, Artemis Panagopoulou\, Daniel Jin\, Delip Rao\, Eric Wong\, Harry Li Zhang\, Kathleen McKeown\, Marianna Apidianaki\, Mark Yatskar\, Shenghao Zhou\, Shreya Havaldar\, Veronica Qing Lyu\, Yue Yang\, and othe
URL:https://seasevents.nmsdev7.com/event/asset-seminar-tba-chris-callison-burch-university-of-pennsylvania/
LOCATION:Levine 307\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Computer and Information Science":MAILTO:cherylh@cis.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230208T150000
DTEND;TZID=America/New_York:20230208T160000
DTSTAMP:20260405T015004
CREATED:20230124T214956Z
LAST-MODIFIED:20230124T214956Z
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SUMMARY:Spring 2023 GRASP SFI: Melkior Ornik\, University of Illinois Urbana-Champaign\, "System Resilience and Guaranteed Performance in the Face of Unexpected Adversity"
DESCRIPTION:This is a hybrid event with in-person attendance in Levine 307 and virtual attendance via Zoom. This week’s presenter will be in-person as well. \nABSTRACT\nThe ability of a system to correctly respond to a sudden adverse event is critical for high-level autonomy in complex\, changing\, or remote environments. By assuming continuing structural knowledge about the system\, classical methods of adaptive or robust control largely attempt to design control laws which enable the system to complete its original task even after an adverse event. However\, catastrophic events such as physical system damage may render the original task impossible to complete. In other words\, any control law that attempts to complete the task is doomed to be unsuccessful. Instead\, an autonomous planner should recognize the task as impossible to complete\, propose an alternative that can certifiably be completed given the current knowledge\, and formulate a control law that drives the system to complete this new task. To do so\, in this talk I will present the emergent twin framework of guaranteed performance and resilience. Combining methods of optimal control\, online learning\, and reachability analysis\, these frameworks first compute a set of temporal tasks completable under all system dynamics consistent with the planner’s partial knowledge. These tasks can then be pursued by online learning and adaptation methods. The talk will consider three scenarios: actuator degradation\, loss of control authority\, and structural change in system dynamics\, and will briefly present several applications to aerial and maritime vehicles\, as well as infrastructure design. Finally\, I will identify promising future directions of research\, including real-time safety-assured mission planning\, resilience of complex networks\, and perception-based task assignment.
URL:https://seasevents.nmsdev7.com/event/spring-2023-grasp-sfi-melkior-ornik/
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
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230209T123000
DTEND;TZID=America/New_York:20230209T133000
DTSTAMP:20260405T015004
CREATED:20230203T164528Z
LAST-MODIFIED:20230203T164528Z
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SUMMARY:ESE Spring Seminar - "Reliable Data-Driven Decision-Making Systems"
DESCRIPTION:Despite impressive success in domains such as vision and language\, machine learning is still far from reliable integration into many challenging real-world scenarios\, such as healthcare\, where the coverage of existing data and the ability to collect new\, diverse data are limited. This talk focuses on mathematically formulating and addressing some of the challenges in data-driven decision-making systems\, studied in the reinforcement learning (RL) framework. I will discuss decision-making based on two sources of data: historical (offline) data and actively-collected data. In learning from offline data\, I first mathematically formulate the challenge of partial data coverage. I show that this formulation combined with pessimistic offline RL unifies the major offline learning paradigms: imitation learning and conventional offline RL. I then present statistically-optimal and practical offline RL algorithms that simultaneously exploit expressive models\, such as deep neural networks\, and historical datasets with any coverage\, to learn good decision-making policies. In learning from interactive data\, I present general formulations and theoretically-guaranteed algorithms that exploit problem structure and expressive models to collect data for learning good policies\, with efficacy demonstrated in a variety of navigation and locomotion tasks.
URL:https://seasevents.nmsdev7.com/event/ese-spring-seminar-title-tbd/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230209T153000
DTEND;TZID=America/New_York:20230209T163000
DTSTAMP:20260405T015004
CREATED:20230105T171342Z
LAST-MODIFIED:20230105T171342Z
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SUMMARY:BE Seminar: "Probing Metabolism Across Scales" (Yihui Shen\, Princeton University)
DESCRIPTION:Metabolism supports the biosynthetic and energetic demand of all living creatures. Over decades\, we have accumulated knowledge of how individual enzymes work in vitro\, but we don’t have a good sense about how they work together in vivo. Thus\, fundamental to our understanding of metabolic operation is the ability to measure metabolic activity in vivo. In this talk I will first briefly introduce an optical imaging technique that allows visualization of metabolism at micron scale. And then I will show how we use multi omics to probe metabolism at a systems scale. By quantifying hundreds of molecular components\, these systems-level measurements allow us to gain fundamental metabolic design principles. For example\, an important metabolic decision is whether to generate energy through fermentation or respiration. Respiration is much more energy efficient. Nevertheless\, many fast-growing cells\, including the baker’s yeast\, activated T cells\, and tumor cells\, switch to aerobic glycolysis (fermentation in the presence of oxygen). How do they achieve the metabolic switch? Why would they prefer wasteful metabolism?  I hope you will join the journey with me to explore the plasticity of metabolism.
URL:https://seasevents.nmsdev7.com/event/be-seminar-yihui-shen-columbia-university/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Postdoctoral
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230209T153000
DTEND;TZID=America/New_York:20230209T163000
DTSTAMP:20260405T015004
CREATED:20230130T173602Z
LAST-MODIFIED:20230130T173602Z
UID:10007450-1675956600-1675960200@seasevents.nmsdev7.com
SUMMARY:CIS Seminar: "Software Security Challenges in the Era of Modern Hardware"
DESCRIPTION:Today’s hardware cannot keep secrets. Indeed\, the past two decades have seen the discovery of a slew of attacks where an adversary exploits hardware features to leak software’s sensitive data. These attacks have shaken the foundations of computer security and caused a major disruption in the software industry. Fortunately\, there has been a saving grace\, namely the widespread adoption of models that have enabled developers to build secure software while comprehensively preventing hardware vulnerabilities. \nIn this talk\, I will present two new classes of vulnerabilities that fundamentally undermine these prevailing models for building secure software. In the first part\, I will demonstrate that the current constant-time programming model is insufficient to guarantee constant-time execution. In the second part\, I will demonstrate that the current resource partitioning model is insufficient to guarantee software isolation. Finally\, I will provide an overview of my future research plans for enabling the design of more secure software and hardware systems.
URL:https://seasevents.nmsdev7.com/event/cis-seminar-software-security-challenges-in-the-era-of-modern-hardware/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Computer and Information Science":MAILTO:cherylh@cis.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230210T103000
DTEND;TZID=America/New_York:20230210T234500
DTSTAMP:20260405T015004
CREATED:20230123T221045Z
LAST-MODIFIED:20230123T221045Z
UID:10007439-1676025000-1676072700@seasevents.nmsdev7.com
SUMMARY:Spring 2023 GRASP on Robotics: Rodney Brooks\, Robust.AI\, "Academic research: exploration vs exploitation"
DESCRIPTION:This is a hybrid event with in-person attendance in Wu and Chen and virtual attendance via Zoom. This week’s presenter will be in-person as well.  \n  \nABSTRACT\nIntelligent action is critical in robotics\, more so than much of AI where results are often mediated by humans in the loop. That said\, robotics also needs to interact with humans. Currently we are in an age of exploitation of techniques that give new capabilities\, and this is as true in academia as it is in industry. But we should hope that a few people in academia are also exploring whether current techniques are the ultimate solutions for robotics\, or whether we should give some thought to whether we are busy riding a silicon-powered wave which will asymptote way below where popular hypenotism would lead us to expect. Perhaps there are really different questions to ask; looking at biological systems suggests that perhaps we don’t yet have a good grasp of very fundamental possibilities\, and that there are rich rewards (and also possible penury) for those willing to take a hard look.
URL:https://seasevents.nmsdev7.com/event/spring-2023-grasp-on-robotics-rodney-brooks/
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
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230210T140000
DTEND;TZID=America/New_York:20230210T150000
DTSTAMP:20260405T015004
CREATED:20230124T161226Z
LAST-MODIFIED:20230124T161226Z
UID:10007443-1676037600-1676041200@seasevents.nmsdev7.com
SUMMARY:PICS Colloquium: "Building and using virtual models of the tricuspid valve toward better understanding\, diagnosis\, and treatment of its diseases"
DESCRIPTION:Computer simulations have become critical elements of the medical device design and regulatory approval process. Naturally\, the predictability and therefore value of such simulations depends highly on their accuracy. Especially for the design of heart valve replacements and repair technologies computer simulations have become a critical tool. While much progress has been made in modeling the aortic valve and the mitral valve\, much less effort has been spent on modeling the tricuspid valve. The reasons are multi-fold\, but include the general neglect of the valve as well as the high complexity of the valve in comparison to the three other valves. In our most recent work\, we are beginning to fulfill this gap. Specifically\, our objective is to develop\, validate\, and then publicly provide a truly subject-specific\, shared model of the human tricuspid valve. To this end\, we combine multi imaging-modality based measurements in beating human hearts that have been prepared in an organ preservation system\, with in-vitro measurements of heart valve geometric\, structural\, and mechanical properties. Once built\, we conduct finite element simulations with this valve and validate dynamic simulations throughout the cardiac cycle against in-situ measurements. Finally\, we show case our model by first mimicking a diseased valve\, which we then repair using a surgical and an interventional approach.
URL:https://seasevents.nmsdev7.com/event/building-and-using-virtual-models-of-the-tricuspid-valve-toward-better-understanding-diagnosis-and-treatment-of-its-diseases/
LOCATION:PICS Conference Room 534 – A Wing \, 5th Floor\, 3401 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Penn Institute for Computational Science (PICS)":MAILTO:dkparks@seas.upenn.edu
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