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DTSTART;TZID=America/New_York:20190226T103000
DTEND;TZID=America/New_York:20190226T120000
DTSTAMP:20260409T004644
CREATED:20190219T211045Z
LAST-MODIFIED:20190219T211045Z
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SUMMARY:MEAM Seminar: "Interfacial Soft Matter"
DESCRIPTION:Surface tension plays a critical role in a wide range of biological\, environmental\, technological and geophysical settings. In this talk\, I will present three different problems dealing with interfacial soft matter that find motivation in markedly diverse areas. First\, I will discuss the evaporation kinetics and flow dynamics of non-spherical sessile drops undergoing phase change. While previous investigations have been restricted to axisymetric drops\, I will illustrate a number of new geometry-induced effects emerging from consideration of a range of non-spherical drops. Second\, I will describe the non-equilibrium dynamics and statistical behavior of a hydrodynamic pilot-wave system\, a liquid drop self-propelling on the surface of a vibrating fluid bath through a resonant interaction with its own wave field. In particular\, I will consider the wave-mediated interaction of this active system with variable bottom topography to illustrate the emergence of wavelike statistics around defects\, and spontaneous collective order and phase transitions in spin lattices. The final part of this talk will deal with active colloids. Specifically\, I will consider the realignment of a Janus drop\, a double-emulsion drop formed by two immiscible fluids\, in response to an externally-imposed temperature gradient. The development of dynamically reconfigurable microlenses based on this mechanism will also be discussed.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-interfacial-soft-matter/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190226T110000
DTEND;TZID=America/New_York:20190226T120000
DTSTAMP:20260409T004644
CREATED:20190212T211631Z
LAST-MODIFIED:20190212T211631Z
UID:10006158-1551178800-1551182400@seasevents.nmsdev7.com
SUMMARY:ESE Seminar: "New Designer Materials: Sculpting Electromagnetic Fields on the Atomic Scale"
DESCRIPTION:New optical nanomaterials hold the potential for breakthroughs in a wide range of areas from ultrafast optoelectronics such as modulators\, light sources and hyperspectral detectors\, to efficient upconversion for energy applications\, bio-sensing and quantum information science. An exciting opportunity to realize such new nanomaterials lies in controlling the local electromagnetic environment on the atomic- and molecular-scale (~1-10 nm)\, which enables extreme local field enhancements. We use creative nanofabrication techniques at the interface between chemistry and physics to realize this new regime together with ultrafast optical techniques to probe the emerging phenomena. Here\, I will provide an overview of our recent research including high-speed thermal photodetectors\, ultrafast spontaneous emission and metasurface-enhanced biosensors.
URL:https://seasevents.nmsdev7.com/event/ese-seminar-new-designer-materials-sculpting-electromagnetic-fields-on-the-atomic-scale/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190226T150000
DTEND;TZID=America/New_York:20190226T160000
DTSTAMP:20260409T004644
CREATED:20190213T192409Z
LAST-MODIFIED:20190213T192409Z
UID:10006159-1551193200-1551196800@seasevents.nmsdev7.com
SUMMARY:CIS Seminar: "Perceiving Humans in the 3D World"
DESCRIPTION:Since the dawn of civilization\, we have functioned in a social environment where we spend our days interacting with other humans. As we approach a society where intelligent systems and humans coexist\, these systems must also interpret and interact with humans that reside in the 3D world. While computer vision systems today work well for finding 2D patterns in images or reconstructing rigid objects in 3D\, they still struggle to perceive non-rigid objects in 3D\, like moving human bodies. My goal is to build a system that can perceive and understand embodied agents in the 3D world from visual input. Such systems can enable motion capture in-the-wild\, robots that learn to act by visually observing people\, and ultimately\, socially intelligent machines that understand human behavior. \n  \nIn this talk\, I will discuss my work in reconstructing 3D non-rigid\, deformable objects such as humans and animals from everyday photographs and video\, and show how such systems can be used to train a simulated character to learn to act by watching YouTube videos. I will discuss the challenges related to the limited availability and quality of ground-truth 3D data and how we can overcome these challenges using weakly supervised approaches.
URL:https://seasevents.nmsdev7.com/event/cis-seminar-perceiving-humans-in-the-3d-world/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Computer and Information Science":MAILTO:cherylh@cis.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190227T150000
DTEND;TZID=America/New_York:20190227T160000
DTSTAMP:20260409T004644
CREATED:20190110T202122Z
LAST-MODIFIED:20190110T202122Z
UID:10006127-1551279600-1551283200@seasevents.nmsdev7.com
SUMMARY:CBE Seminar: "Mechanisms of Cellulose Activation and Implications for Bioenergy"
DESCRIPTION:
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-mechanisms-of-cellulose-activation-and-implications-for-bioenergy/
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:20190228T110000
DTEND;TZID=America/New_York:20190228T120000
DTSTAMP:20260409T004644
CREATED:20190221T201143Z
LAST-MODIFIED:20190221T201143Z
UID:10006173-1551351600-1551355200@seasevents.nmsdev7.com
SUMMARY:ESE Seminar: "Towards Socially-Aware Autonomy for Mobility-Efficient Smart Cities"
DESCRIPTION:As cities grow everywhere\, and urban roadways become overburdened\, efficient strategies are required for improving mobility. With the prevalence of smart sensing and Internet of Things (IoT) devices\, such as smartphones and smart intersections\, the physical infrastructures of our cities are being connected to the cyber world. As a result\, cities are becoming smart. Moreover\, with the emergence of new and inevitable technologies\, such as autonomous and connected vehicles\, mobility on demand systems\, and electric vehicles\, smart cities are rapidly evolving. As we experience the arrival of such technologies\, there is an opportunity to reclaim urban mobility. However\, a blind utilization of these technologies may deflect us from reaching this goal. In my research\, I leverage the connectivity that is inherent in smart cities as well as the opportunities that new technologies such as autonomous and connected vehicles provide\, to study the efficient operation of smart cities via management strategies that can guarantee overall societal benefits. \nIn this talk\, I will focus on the societal-scale mobility implications of the increased deployment of autonomous and connected vehicles in mixed-autonomy traffic networks\, where both human-driven and autonomous vehicles will coexist on the roads. I will first talk about the mobility implications of selfish autonomy\, in which autonomous cars are not aware of their overall impact and simply attempt to optimize their own travel benefits. In this context\, I will introduce conditions under which an increase in the fraction of autonomous vehicles on a traffic network\, even when operating selfishly\, results in increased societal mobility benefits. Conversely\, I will show that if these conditions do not hold\, overall network mobility may degrade as the fraction of autonomous vehicles increases. Having shown the negative consequences that the increased deployment of autonomous and connected vehicles may have on the operation of traffic networks\, I will further discuss the use of traffic management strategies\, such as pricing\, which can guarantee the overall societal-scale efficiency of traffic networks with mixed vehicle autonomy.
URL:https://seasevents.nmsdev7.com/event/ese-seminar-towards-socially-aware-autonomy-for-mobility-efficient-smart-cities/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190228T120000
DTEND;TZID=America/New_York:20190228T140000
DTSTAMP:20260409T004644
CREATED:20190218T204911Z
LAST-MODIFIED:20190218T204911Z
UID:10006170-1551355200-1551362400@seasevents.nmsdev7.com
SUMMARY:ODI Seminar: Christopher Hart\, Former NTSB Chairman\, on the Future of Autonomous Vehicles
DESCRIPTION:Join the Office of Diversity and Inclusion for an afternoon with Christopher Hart\, who will discuss the state and future of autonomous vehicles. The talk will be followed by a reception.
URL:https://seasevents.nmsdev7.com/event/christopher-hart-on-the-future-of-autonomous-vehicles/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190228T150000
DTEND;TZID=America/New_York:20190228T160000
DTSTAMP:20260409T004644
CREATED:20190213T193104Z
LAST-MODIFIED:20190213T193104Z
UID:10006160-1551366000-1551369600@seasevents.nmsdev7.com
SUMMARY:CIS Seminar: " Rethinking the hardware-software contract:   Enabling practical and general cross-layer optimizations"
DESCRIPTION:Layered abstractions in the computing stack are critical to building complex systems\, but the existing *interfaces* between layers restrict what can be done at each level. Enhancing cross-layer interfaces–specifically\, the hardware-software interface–is crucial towards addressing two important and hard-to-solve challenges in computer systems today: First\, significant effort and expertise are required to write high-performance code that harnesses the full potential of today’s diverse and sophisticated hardware. Second\, as a hardware or system designer\, architecting faster and more efficient systems is challenging as the vast majority of the program’s semantic content and programmer intent gets lost in translation with today’s hardware-software interface. Moving towards the future\, these challenges in programmability and efficiency will be even more intractable as we architect increasingly heterogeneous and sophisticated systems. \nIn this talk\, I will highlight my work [ISCA‘15\, MICRO‘16\, ISCA‘18\, ISCA‘18] on how to design rich cross-layer abstractions that provide layered interfaces to directly communicate higher-level program semantics and intent from the application to the lower levels of the stack. In doing so\, we can effectively bridge the so-called “semantic gap” between applications and computer systems\, and enable a wide range of cross-layer optimizations in future systems with a unifying interface. I will discuss how cross-layer approaches with these abstractions can significantly enhance (1) performance and efficiency by enabling the system to adapt to application characteristics and (2) programmability and portability by enabling application software to easily leverage diverse underlying hardware resources without specific knowledge of system details.  For example\, daunting aspects of programming GPUs can be made much simpler with a rich cross-layer programming abstraction. I will describe how such abstractions can be designed to be highly practical and low-overhead\, requiring only small additions to existing abstractions.
URL:https://seasevents.nmsdev7.com/event/1309/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190301T110000
DTEND;TZID=America/New_York:20190301T120000
DTSTAMP:20260409T004644
CREATED:20190219T160152Z
LAST-MODIFIED:20190219T160152Z
UID:10006151-1551438000-1551441600@seasevents.nmsdev7.com
SUMMARY:ESE Seminar: "Quantum Nanophotonics: Engineering Atom-Photon Interactions on a Chip"
DESCRIPTION:Abstract: The ability to engineer controllable atom-photon interactions is at the heart of quantum optics and quantum information processing. In this talk\, I will introduce a nanophotonic platform for engineering strong atom-photon interactions on a semiconductor chip. I will first discuss an experimental demonstration of a spin-photon quantum transistor [1]\, a fundamental building block for quantum repeaters and quantum networks. The device allows a single spin trapped inside a semiconductor quantum dot to switch a single photon\, and vice versa\, a single photon to flip the spin. I will discuss how the spin-photon quantum transistor realizes optical nonlinearity at the fundamental single quantum level\, where a single photon could switch the transmission of multiple subsequent photons [2]. I will next discuss the promise of realizing photon-mediated many-body interactions in an alternative solid-state platform based on a more homogeneous quantum emitter\, silicon-vacancy (SiV) color centers in diamond. I will introduce our efforts in creating strong light-matter interactions through photonic crystal cavities fabricated in diamond [3]\, and the use of cavity-stimulated Raman emission to overcome the remaining frequency inhomogeneity of the emitters [4]. Finally\, I will outline the exciting prospects of applying inverse designed nanophotonic structures into quantum optics\, and their potential applications in engineering photon-mediated atom-atom interactions.\nReferences\n[1] S. Sun et al.\, Nature Nanotech. 11\, 539–544 (2016).\n[2] S. Sun et al.\, Science 361\, 57-60 (2018).\n[3] J. L. Zhang* and S. Sun* et al.\, Nano Lett. 18\, 1360–1365 (2018).\n[4] S. Sun et al.\, Phys. Rev. Lett. 121\, 083601 (2018)
URL:https://seasevents.nmsdev7.com/event/ese-seminar-quantum-nanophotonics-engineering-atom-photon-interactions-on-a-chip/
LOCATION:Berger Auditorium (Room 13)\, Skirkanich Hall\, 210 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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