BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Penn Engineering Events - ECPv6.15.18//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Penn Engineering Events
X-ORIGINAL-URL:https://seasevents.nmsdev7.com
X-WR-CALDESC:Events for Penn Engineering Events
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20210314T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20211107T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20220313T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20221106T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20230312T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20231105T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221010T110000
DTEND;TZID=America/New_York:20221010T120000
DTSTAMP:20260405T175228
CREATED:20221006T143207Z
LAST-MODIFIED:20221006T143207Z
UID:10007323-1665399600-1665403200@seasevents.nmsdev7.com
SUMMARY:Chester\, PA & Environmental Justice
DESCRIPTION:This panel will discuss the state of affairs in Chester PA and environmental (in)justice. Current research and community assessment of environmental vulnerability of Chester will be presented\, air quality control issues will be discussed as well as community efforts for empowerment and legislative action. \n  \nSpeakers: \nJennifer Horney\, University of Delaware \n\nDora Williams\, Community Organizer and Activist \n\nEcho Alford\, Community Organizer\, Clean Air Council of Philadelphia \n\nKearni Nichelle Warren\, Community Organizer and Activist
URL:https://seasevents.nmsdev7.com/event/chester-pa-environmental-justice/
LOCATION:https://upenn.zoom.us/j/96715197752
CATEGORIES:Panel Discussion
ATTACH;FMTTYPE=image/png:https://seasevents.nmsdev7.com/wp-content/uploads/2022/10/chester-delete.png
ORGANIZER;CN="SEAS Green Team":MAILTO:dianepa@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221010T120000
DTEND;TZID=America/New_York:20221010T133000
DTSTAMP:20260405T175228
CREATED:20220927T201917Z
LAST-MODIFIED:20220927T201917Z
UID:10007308-1665403200-1665408600@seasevents.nmsdev7.com
SUMMARY:Beyond Techno-Economics: Responsible Deployment in Carbon Management
DESCRIPTION:The science is clear: to avoid the worst impacts of climate change we’ll need aggressive\, economy-wide decarbonization in combination with atmospheric carbon removal at the billion-ton scale. These efforts will require unprecedented management of carbon dioxide through strategic technical deployment and infrastructure buildout. \nBut given the rapid pace and scale of deployment ahead\, how can we identify responsible pathways that maximize benefits and minimize harms? \nIn this talk\, Pete Psarras explores challenges and opportunities in carbon management\, illustrating how various impact layers from the techno-economic\, social\, and environmental perspectives interact to form a new picture of deployment. \nWhat role will energy-intensive options like direct air capture play and how will our decision-making today impact that role by mid-century? How does grid electrification and transmission buildout play into technology siting? What are the opportunities for community co-benefits? And alternatively\, how do we assess tradeoffs that pit inevitable impacts against one another? Take a journey into the real-world case study of Nevada and its net-zero ambitions to help address these questions and set the stage for a challenging yet critical road ahead.
URL:https://seasevents.nmsdev7.com/event/beyond-techno-economics-responsible-deployment-in-carbon-management/
LOCATION:Kleinman Energy Forum\, Fisher Fine Arts Library\, 220 S 34th Street\, Philadelphia\, PA\, 19104\, United States
ATTACH;FMTTYPE=image/jpeg:https://seasevents.nmsdev7.com/wp-content/uploads/2022/09/IMG_9212_25.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221010T130000
DTEND;TZID=America/New_York:20221010T140000
DTSTAMP:20260405T175228
CREATED:20220901T140334Z
LAST-MODIFIED:20220901T140334Z
UID:10007241-1665406800-1665410400@seasevents.nmsdev7.com
SUMMARY:PSOC Seminar: “Nanotechnologies for Isolating and Characterizing Extracellular Nanocarriers of Cancer Biomarkers" (Hsueh-Chia Chang\, University of Notre Dame)
DESCRIPTION:Fall 2022 Hybrid-Seminar Series  \nMondays 1.00-2.00 pm (EST)  \nTowne 225 / Raisler Lounge   \nFor Zoom link\, please contact <manu@seas.upenn.edu
URL:https://seasevents.nmsdev7.com/event/psoc-seminar-nanotechnologies-for-isolating-and-characterizing-extracellular-nanocarriers-of-cancer-biomarkers-hsueh-chia-chang-university-of-notre-dame/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="PSOC":MAILTO:manu@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221010T150000
DTEND;TZID=America/New_York:20221010T160000
DTSTAMP:20260405T175228
CREATED:20221004T150126Z
LAST-MODIFIED:20221004T150126Z
UID:10007316-1665414000-1665417600@seasevents.nmsdev7.com
SUMMARY:Fall 2022 GRASP Seminar: Tomas Pajdla\, Czech Technical University\, "Solving Minimal Problems in the Age of Machine Learning"
DESCRIPTION:This is a hybrid event with in-person attendance in Levine 307 and virtual attendance via Zoom. \n  \nABSTRACT\nI will discuss several our recent advances in understanding minimal problems in computer vision using numerical algebraic geometry tools\, i.e.\, Homotopy continuation and monodromy\, as well as machine learning. I will talk about our classification of minimal problems under full and partial visibility and about learning startups for solving hard minimal problems by local methods.
URL:https://seasevents.nmsdev7.com/event/fall-2022-grasp-seminar-tomas-pajdla/
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:20221011T100000
DTEND;TZID=America/New_York:20221011T113000
DTSTAMP:20260405T175228
CREATED:20220919T193445Z
LAST-MODIFIED:20220919T193445Z
UID:10007299-1665482400-1665487800@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Materials and Manufacturing Solutions for Sustainable Energy"
DESCRIPTION:In response to the grave and escalating threat of climate change\, the US Department of Energy has announced a series of ambitious Energy Earth Shot Initiatives. These target an 80% reduction in the cost of clean hydrogen by 2030 and net-zero carbon emissions by 2050. The first of the initiatives focuses on establishing a green hydrogen-powered grid. Hydrogen is expected to play an important role in the creation of a carbon neutral/positive hybrid network for energy production\, storage\, and distribution. Two key technological challenges are the repurposing of existing infrastructure\, such as land-based gas turbines for hydrogen combustion\, and accelerating deployment of new infrastructure\, including far-offshore wind farms that can generate hydrogen for energy storage and transfer\, helping to address energy demand intermittency and decentralization challenges. \nAs such\, there is an urgent need to develop structural and tribological materials with greater resilience to harsh environments including hydrogen-containing fluids at extremes of temperature\, which can range from liquid hydrogen (20 K) in cryogenic pumps and pressure vessels to >1500 K in gas turbines. High-entropy alloys (HEAs) and additive manufacturing (AM) methods are two areas of intensive research and a focus of this presentation. Highlights will be presented from ongoing work at Ames National Laboratory\, in collaboration with other national laboratory\, academic\, and industry partners\, including the use of AM as a means of processing refractory HEA and other traditionally difficult-to-manufacture alloys. The development and use of rapid mechanical property characterization methods will also be discussed\, as well as how these are enabling alloy discovery and process optimization\, including for HEAs\, which are multi-element alloys that present an extraordinarily challenging departure from traditionally dilute compositions. Additionally\, examples of new fundamental insights about structure-property relationships for compositionally and structurally complex systems like HEAs and metallic glasses will be presented.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-materials-and-manufacturing-solutions-for-sustainable-energy/
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:20221011T110000
DTEND;TZID=America/New_York:20221011T120000
DTSTAMP:20260405T175228
CREATED:20221003T205615Z
LAST-MODIFIED:20221003T205615Z
UID:10007315-1665486000-1665489600@seasevents.nmsdev7.com
SUMMARY:LRSM Special Lecture: "Pursuing a Scientific Career at a National Laboratory"
DESCRIPTION:If you are ﬁnishing your PhD or your postdoctoral tenure you may be asking yourself\, What’s next? Should I pursue an academic career\, as my thesis adviser or postdoctoral supervisor has done? Or should I look elsewhere\, perhaps at industry\, or government? These are great questions that most of us have asked ourselves at the beginning of our professional life. And while I believe that the university\, the private sector\, and public service are excellent options to consider\, I am here to invite you to add one more possibility – being a scientist at one of the national laboratories\, most of which are run by the US Department of Energy. \nIn this short talk\, I will ﬁrst brieﬂy compare a research university with a national laboratory. Then\, I will use Brookhaven National Laboratory (BNL)\, on Long Island (NY)\, as an example to describe representative national-laboratory programs on materials science and condensed-matter physics\, and the large facilities available for projects\, among many others\, on quantum materials\, catalysis\, and materials self-assembly. Finally\, I will describe a typical career path at BNL and mention current and future opportunities for staff and postdoctoral positions. \nAn essential part of this informational seminar is the Questions and Answers period that will follow the talk.
URL:https://seasevents.nmsdev7.com/event/lrsm-special-lecture-pursuing-a-scientific-career-at-a-national-laboratory/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221011T153000
DTEND;TZID=America/New_York:20221011T163000
DTSTAMP:20260405T175228
CREATED:20220812T143626Z
LAST-MODIFIED:20220812T143626Z
UID:10007224-1665502200-1665505800@seasevents.nmsdev7.com
SUMMARY:BE Seminar: "Studying the Neural basis of Natural Spatial\, Social and Acoustic Behaviors – in Freely Behaving and Flying Bats" (Michael Yartsev\, UC Berkeley)
DESCRIPTION:This is a hybrid seminar that will take place in Glandt Forum (Singh Center) and via Zoom (check email for link and passcode). \nOur lab seeks to understand the neural basis of complex spatial\, acoustic and social behaviors in mammals. To do so\, we take a neuroethological approach that leverages the specialization of the bat (Rousettus aegyptiacus) for these behaviors in order to elucidate their underlying neural computations. In the spatial domain\, we take advantage of the bat’s ability to elegantly navigate during high-speed flight and under varying levels of spatial complexities. In the social-acoustic domain\, we utilize the bat’s social communication signals to understand how these are learned and later used during natural group social interactions. In parallel\, we have pioneered a suite of cutting-edge technologies that make it possible to study the behavior and neural circuits in freely behaving and flying bats to examine these systems in a way not previously possible. In this talk\, I provide an overview of some of the research topics our lab has been working on over the past few years.
URL:https://seasevents.nmsdev7.com/event/be-seminar-michael-yartsev-uc-berkeley/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221011T160000
DTEND;TZID=America/New_York:20221011T170000
DTSTAMP:20260405T175228
CREATED:20221006T143754Z
LAST-MODIFIED:20221006T143754Z
UID:10007324-1665504000-1665507600@seasevents.nmsdev7.com
SUMMARY:Climate Justice in Philadelphia: House by house\, block by block
DESCRIPTION:More details coming soon!
URL:https://seasevents.nmsdev7.com/event/climate-justice-in-philadelphia-house-by-house-block-by-block/
LOCATION:https://upenn.zoom.us/j/96715197752
CATEGORIES:Panel Discussion
ATTACH;FMTTYPE=image/png:https://seasevents.nmsdev7.com/wp-content/uploads/2022/10/climate-justice-delete.png
ORGANIZER;CN="SEAS Green Team":MAILTO:dianepa@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221012T120000
DTEND;TZID=America/New_York:20221012T133000
DTSTAMP:20260405T175228
CREATED:20220909T132857Z
LAST-MODIFIED:20220909T132857Z
UID:10007261-1665576000-1665581400@seasevents.nmsdev7.com
SUMMARY:ASSET Seminar: What Transfers in Transfer Learning?\, Eric Wong (University of Pennsylvania)
DESCRIPTION:Abstract: \nRecently\, the transfer learning paradigm has seen a surge of interest due to its impressive capabilities in vision and language. Models are pretrained on ever-growing datasets with enormous parameter counts\, trending towards being monolithic and opaque. How can we understand the underlying process? This talk will provide\, to some degree\, insight on how data affects transfer learning using the framework of influence functions. These findings include pinpointing subpopulations and biases in the pretraining data that help (or hurt) transfer performance.
URL:https://seasevents.nmsdev7.com/event/asset-seminar-tba-eric-wong-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:20221012T140000
DTEND;TZID=America/New_York:20221012T150000
DTSTAMP:20260405T175228
CREATED:20221006T144420Z
LAST-MODIFIED:20221006T144420Z
UID:10007325-1665583200-1665586800@seasevents.nmsdev7.com
SUMMARY:Impacts of Climate Change on Global Water Resources and Engineering Solutions
DESCRIPTION:This panel will examine the impact of climate change on global water resources and how these impacts have affected people in the global south. From droughts that have led to crop failures to floods that have damaged crops and property\, it is obvious that climate change has brought extremes in weather and has compromised the availability of clean water to peoples in developing countries where resilience against changing climate are fragile at best. Panelists will offer engineering and hydro ideas that can lead to improvement of the current situation. \n  \nSpeakers: \nDoug Jerolmack\, Penn Engineering \nTony Sauder\, Penn EES/LPS\, Water Center at Penn \nPaulo Arratia\, Penn Engineering
URL:https://seasevents.nmsdev7.com/event/impacts-of-climate-change-on-global-water-resources-and-engineering-solutions/
LOCATION:https://upenn.zoom.us/j/96715197752
CATEGORIES:Panel Discussion
ATTACH;FMTTYPE=image/jpeg:https://seasevents.nmsdev7.com/wp-content/uploads/2022/10/climate-delete.jpg
ORGANIZER;CN="SEAS Green Team":MAILTO:dianepa@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221012T150000
DTEND;TZID=America/New_York:20221012T160000
DTSTAMP:20260405T175228
CREATED:20221006T135945Z
LAST-MODIFIED:20221006T135945Z
UID:10007322-1665586800-1665590400@seasevents.nmsdev7.com
SUMMARY:Fall 2022 GRASP SFI: Sonia Chernova\, Georgia Institute of Technology\, “Semantic-Driven Robot Assistance and User Interaction”
DESCRIPTION:This is a hybrid event with in-person attendance in Levine 307 and virtual attendance via Zoom. \nABSTRACT\nReliable operation in everyday human environments – homes\, offices\, and businesses – remains elusive for today’s robotic systems.  A key challenge is diversity\, as no two homes or businesses are exactly alike.  However\, despite the innumerable unique aspects of any home\, there are many commonalities as well\, particularly about how objects are placed and used.  These commonalities can be captured in semantic representations\, and then used to improve the autonomy of robotic systems by\, for example\, enabling robots to infer missing information in human instructions\, efficiently search for objects\, or manipulate objects more effectively.  This talk will discuss recent advances in semantic reasoning\, particularly focusing on semantics of everyday objects\, household environments\, and the development of robotic systems that intelligently interact with users.
URL:https://seasevents.nmsdev7.com/event/fall-2022-grasp-sfi-sonia-chernova/
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:20221012T153000
DTEND;TZID=America/New_York:20221012T163000
DTSTAMP:20260405T175228
CREATED:20220909T195522Z
LAST-MODIFIED:20220909T195522Z
UID:10007274-1665588600-1665592200@seasevents.nmsdev7.com
SUMMARY:CBE Seminar Series: Title TBA (Scott Milner\, Pennsylvania State University)
DESCRIPTION:
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-series-title-tba-scott-milner-pennsylvania-state-university/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20221013
DTEND;VALUE=DATE:20221014
DTSTAMP:20260405T175228
CREATED:20220927T203438Z
LAST-MODIFIED:20220927T203438Z
UID:10007309-1665619200-1665705599@seasevents.nmsdev7.com
SUMMARY:Singh Center for Nanotechnology Annual User Meeting
DESCRIPTION:The 2022 Singh Center for Nanotechnology Annual User Meeting will be held on Thursday\, October 13\, 2022\, in the Singh Center’s Glandt Forum. The purpose for this in-person meeting is to welcome the user community as we celebrate the acheivements of nanotechnology-enabled research and innovation at the University of Pennsylvania.  For more information:  http://singhnano.eventbrite.com/
URL:https://seasevents.nmsdev7.com/event/singh-center-for-nanotechnology-annual-user-meeting/
LOCATION:Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221013T103000
DTEND;TZID=America/New_York:20221013T113000
DTSTAMP:20260405T175228
CREATED:20221004T205758Z
LAST-MODIFIED:20221004T205758Z
UID:10007318-1665657000-1665660600@seasevents.nmsdev7.com
SUMMARY:MSE Seminar: “Additive Manufacturing of Compositionally Complex Alloys with Engineered Microstructures”
DESCRIPTION:The increasing demand for structural metals has driven increasingly complex compositions\, which bring critical challenges in processing of these materials. Additive manufacturing\, also called 3D printing\, is a disruptive technology for creating structural materials and components in a single print. In this talk\, I will present our recent work on additive manufacturing of compositionally complex alloys (CCAs) with tailored microstructures and properties. Specifically\, I will show the potential of leveraging laser additive manufacturing and direct ink writing to produce CCAs such as high-entropy alloys and bulk metallic glass composites with unique microstructures\, leading to extraordinary mechanical properties that can extend far beyond those achievable via conventional processing methods. In addition\, I will discuss the abundant opportunities enabled by additive manufacturing for high-throughput materials discovery to accelerate the pace of multicomponent alloy design.
URL:https://seasevents.nmsdev7.com/event/mse-seminar-additive-manufacturing-of-compositionally-complex-alloys-with-engineered-microstructures/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221014T103000
DTEND;TZID=America/New_York:20221014T114500
DTSTAMP:20260405T175228
CREATED:20220919T173938Z
LAST-MODIFIED:20220919T173938Z
UID:10007298-1665743400-1665747900@seasevents.nmsdev7.com
SUMMARY:Fall 2022 GRASP on Robotics: Victoria Webster-Wood\, Carnegie Mellon University\, “It’s Alive! Bioinspired and biohybrid approaches towards life-like and living robots”
DESCRIPTION:This is a hybrid event with in-person attendance in Wu and Chen and virtual attendance via Zoom. \nABSTRACT\n\nAnimals have long served as an inspiration for robotics. However\, the adaptability\, complex control\, and advanced learning capabilities observed in animals are not yet fully understood\, and therefore have not been fully captured by current robotic systems. Furthermore\, many of the mechanical properties and physical capabilities seen in animals have yet to be achieved in robotic platforms. For example\, standard materials for robotic fabrication do not exhibit self-healing or have the ability to autonomously generate energy\, as is seen in biological systems. Additionally\, traditional robotic actuators lack the compliance\, energy efficiency\, and power-to-weight ratio combinations observed in musculoskeletal systems. \nIn this talk\, I will share efforts from my group in our two primary research thrusts: Bioinspired robotics\, and biohybrid robotics. By using neuromechanical models and bioinspired robots as tools for basic research we are developing new models of how animals achieve multifunctional\, adaptable behaviors. Building on our understanding of animal systems and living tissues\, our research in biohybrid robotics is enabling new approaches toward the creation of autonomous biodegradable living robots. Such robotic systems have future applications in medicine\, search and rescue\, and environmental monitoring of sensitive environments (e.g.\, coral reefs).
URL:https://seasevents.nmsdev7.com/event/fall-2022-grasp-on-robotics-victoria-webster-wood-carnegie-mellon-university-its-alive-bioinspired-and-biohybrid-approaches-towards-life-like-and-living-robots/
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:20221014T140000
DTEND;TZID=America/New_York:20221014T150000
DTSTAMP:20260405T175228
CREATED:20220927T135218Z
LAST-MODIFIED:20220927T135218Z
UID:10007307-1665756000-1665759600@seasevents.nmsdev7.com
SUMMARY:PICS Colloquium\, “Sound Attenuation and the Vibrational Properties of Glasses”
DESCRIPTION:Abstract: Understanding of the universal low-temperature properties of glasses and why they differ from their crystalline counterparts requires the understanding of the vibrational properties of glasses. Due to recent advances of computational techniques\, we are now able to study simulated glasses with a wide range of vibrational properties\, which is essential to understanding their role in the low-temperature properties of glasses. In this talk I will discuss the stability dependence of the vibrational modes of glasses ranging from poorly annealed to exceptionally stable. Our most stable glasses are comparable to exceptionally-stable\, vapor- deposited laboratory glasses. We find that the density of quasi-localized\, low-frequency modes decrease quickly with increasing stability and the density of these modes are correlated with sound attenuation in the harmonic approximation. We use a recently developed theory that very accurately reproduces the low-frequency sound attenuation to examine the relationship between the vibrational modes and sound attenuation. This theory indicates that the non- affine forces\, which are responsible for the renormalization of the speed of sound in amorphous solids\, is responsible for sound attenuation. Surprisingly\, we find that the low- frequency\, quasi-localized modes make a relatively small contribution to the sound attenuation coefficient compared to the extended\, low-frequency modes. I will conclude by discussing recent attempts at identifying regions of the glass that play an enhanced role in sound attenuation\, if they exist.
URL:https://seasevents.nmsdev7.com/event/pics-colloquium-sound-attenuation-and-the-vibrational-properties-of-glasses/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221014T160000
DTEND;TZID=America/New_York:20221014T163000
DTSTAMP:20260405T175228
CREATED:20221012T195455Z
LAST-MODIFIED:20221012T195455Z
UID:10007331-1665763200-1665765000@seasevents.nmsdev7.com
SUMMARY:P.E.S.T.L.E. Orientation - October 14
DESCRIPTION:Join PESTLE for our Zoom Orientation session on Friday\, October 14 at 4:00 pm! Please email us at pestle@seas.upenn.edu if you have any questions.
URL:https://seasevents.nmsdev7.com/event/pestle-orientation-october-14/
LOCATION:https://upenn.zoom.us/j/96715197752
ORGANIZER;CN="Research and Academic Services":MAILTO:ras@seas.upenn.edu
END:VEVENT
END:VCALENDAR