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DTSTART;TZID=America/New_York:20200109T120000
DTEND;TZID=America/New_York:20200109T130000
DTSTAMP:20260408T030610
CREATED:20191210T194727Z
LAST-MODIFIED:20191210T194727Z
UID:10006344-1578571200-1578574800@seasevents.nmsdev7.com
SUMMARY:BE Seminar: "High-throughput T cell repertoire profiling enabled systems immunology and immune engineering"
DESCRIPTION:T cells are important to the initiation\, prevention\, and cure of many diseases. For example\, various T cells based cancer immunotherapies have been quite effective in treating several types of cancers. However\, a significant fraction of patients do not respond. A comprehensive understanding of the complexity of the T cells repertoire in health and diseases not only provide underlying mechanisms but also new therapeutic targets. In the past several years\, we have developed several tools to profile the T cell repertoire from T cell receptor diversity to T cell receptor affinity to multi-dimensional profiling of single T cells in high-throughput. In this talk\, I will first introduce these tools and then give examples on how we use them to answer some of the fundamental questions in systems immunology\, which in turn help us design new approaches in immune engineering.
URL:https://seasevents.nmsdev7.com/event/be-seminar-high-throughput-t-cell-repertoire-profiling-enabled-systems-immunology-and-immune-engineering/
LOCATION:Room 337\, Towne Building\, 220 South 33rd 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:20200110T140000
DTEND;TZID=America/New_York:20200110T150000
DTSTAMP:20260408T030610
CREATED:20200109T172651Z
LAST-MODIFIED:20200109T172651Z
UID:10006372-1578664800-1578668400@seasevents.nmsdev7.com
SUMMARY:Thesis Defense: "Transcriptional Control of Endothelial Cell Motility\, Extracellular Matrix Sensing\, and Vasculogenesis"
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Dr. Joel Boerckel are pleased to announce the Doctoral Dissertation Defense of Devon E. Mason. \nThis event is open to the public.
URL:https://seasevents.nmsdev7.com/event/thesis-defense-transcriptional-control-of-endothelial-cell-motility-extracellular-matrix-sensing-and-vasculogenesis/
LOCATION:Class of 62 Auditorium\, John Morgan Building\, 3620 Hamilton Walk\, Philadelphia\, PA\, 19104
CATEGORIES:Student,Dissertation or Thesis Defense
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200113T100000
DTEND;TZID=America/New_York:20200113T160000
DTSTAMP:20260408T030610
CREATED:20191205T161642Z
LAST-MODIFIED:20191205T161642Z
UID:10006342-1578909600-1578931200@seasevents.nmsdev7.com
SUMMARY:REACT@Penn 2020: Global Pathways to enable Innovative Materials Solutions for Urban Challenges
DESCRIPTION:How can science and technology help cities solve their problems?  Are there common urban air\, water and energy challenges for science to tackle? \n\n\n\n\n10:00 am\nUrban Challenges with (potential) Materials Solutions\nModel cities of Grenoble\, France\, Philadelphia\, USA and Seoul\, Korea\n\n\n1:30 pm\nAdoption and Adaptation of New Technologies for Urban Challenges\nJoshua Sperling\, National Renewable Energy Laboratory\n\n\n2:30 pm\nFacilitating New Technology-based Solutions for Urban Challenges\nPanel discussion that includes experts from the Water Center at Penn\, City of Philadelphia’s Department of Planning and Development and Office of Transportation\, Infrastructure & Sustainability\n\n\n\n\n\nhttps://react.seas.upenn.edu/event/react-at-penn-2020/
URL:https://seasevents.nmsdev7.com/event/reactpenn-2020-global-pathways-to-enable-innovative-materials-solutions-for-urban-challenges/
LOCATION:Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200114T103000
DTEND;TZID=America/New_York:20200114T120000
DTSTAMP:20260408T030610
CREATED:20200108T205330Z
LAST-MODIFIED:20200108T205330Z
UID:10006360-1578997800-1579003200@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Confined Curved Shells and their Elaborate Conformations"
DESCRIPTION:Curved shells\, when confined\, can deform to a broad assortment of large scale shapes and smaller scale wrinkling and folding patterns quite unlike what produced by their flat counterparts. The intrinsic\, natural curvature of shells is the central element that allows for this rich and very interesting morphological landscape\, but it is also the source of geometric nonlinearities that renders an analytic treatment of non‐Euclidean shells\, even under small load\, very difficult. In this talk we examine some snapshots of this morphological landscape. Inspired by the natural folding and unfolding of polled grains\, we use theory\, simulations and experiments to explore the large scale deformation of a confined thin spherical shell with an opening. We then proceed to investigate the surface topography of shallow doubly curved shells resting on a fluid substrate. The frustration due to the competing geometry of the flat substrate and the curved shell produces a wealth of highly reproducible and ordered\, or random and disordered patterns. From these examples\, we see Gaussian curvature emerging as a powerful tool that can generate complex patterns.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-confined-curved-shells-and-their-elaborate-conformations/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 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:20200115T150000
DTEND;TZID=America/New_York:20200115T160000
DTSTAMP:20260408T030610
CREATED:20200110T184725Z
LAST-MODIFIED:20200110T184725Z
UID:10006379-1579100400-1579104000@seasevents.nmsdev7.com
SUMMARY:MSE Materials in Practice Seminar: "So You're an Engineer...Now What?"
DESCRIPTION:Materials in Practice is a seminar series where technologists who are using materials science to shape the world we live in share their secret to doing this. We hope that anyone who wants to apply the research they are doing to solve real world problems will be able to attend this Seminar Series.
URL:https://seasevents.nmsdev7.com/event/mse-materials-in-practice-seminar-so-youre-an-engineer-now-what/
LOCATION:LRSM Reading Room\, 3231 Walnut St.\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200116T104500
DTEND;TZID=America/New_York:20200116T114500
DTSTAMP:20260408T030610
CREATED:20200102T182754Z
LAST-MODIFIED:20200102T182754Z
UID:10006359-1579171500-1579175100@seasevents.nmsdev7.com
SUMMARY:MSE Grace Hopper Lecture: "Artificial Intelligence for Generating Materials Science Knowledge"
DESCRIPTION:The process of scientific inquiry involves observing a signal (data) and interpreting it to generate information (knowledge). For example\, in electron microscopy the signal may be a diffraction pattern from which information on crystal orientation may be deduced by applying diffraction theory. Science advances both through improvements in gathering data and in techniques for extracting knowledge from it. Artificial intelligence (AI) – a broad term comprising data science\, machine learning (ML)\, neural network computing\, computer vision\, and other technologies – opens new avenues for extracting information from high-dimensional materials data. In that sense\, AI offers the possibility to advance materials science in the same way as a new imaging modality or a new theoretical model. The applications of AI in materials science cut a broad swath\, from large\, labelled data sets the fit naturally in the Big Data paradigm to small\, sparse\, multimodal data sets that test the limits of cutting-edge AI. \nThis presentation will focus on AI applications in the context of image-based data\, including both visual features and composition\, processing\, or properties metadata. Computer vision (CV) representations are developed to numerically encode the visual information contained in images. ML tools are then selected based on the characteristics of the data set and the desired outcome. For example\, a large\, homogeneous data set of steel inclusions is best suited to a Deep Learning approach involving a purpose-built convolutional neural network. In contrast\, a random-forest method can find significant trends in a small\, multi-modal data set that includes microstructural\, crystallographic\, and micromechanical data. Complex image segmentation leverages a convolution neural network that has been trained using images very different from those it is applied to. These case studies will motivate a discussion of AI method selection based on data set characteristics and desired outcomes. The ultimate goal is to develop AI as a new tool for information extraction and knowledge generation in materials science.
URL:https://seasevents.nmsdev7.com/event/mse-grace-hopper-lecture-artificial-intelligence-for-generating-materials-science-knowledge/
LOCATION:Auditorium\, LRSM Building\, 3231 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200121T103000
DTEND;TZID=America/New_York:20200121T120000
DTSTAMP:20260408T030610
CREATED:20200109T221559Z
LAST-MODIFIED:20200109T221559Z
UID:10006378-1579602600-1579608000@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Plate Mechanical Metamaterials and their Applications"
DESCRIPTION:Recently\, we introduced the concept of plate mechanical metamaterials—cellular plates with carefully controlled periodic geometry and unique mechanical properties—as well as its initial realization in the form of freestanding corrugated plates made out of an ultrathin film. We used atomic layer deposition (ALD) and microfabrication techniques to make robust plates out of a single continuous ALD layer with cm-scale lateral dimensions and thicknesses between 25 and 100 nm\, creating the thinnest freestanding plates that can be picked up by hand. We also fabricated and characterized nanocardboard – plate metamaterials made from multiple layers of nanoscale thickness\, whose geometry and properties are reminiscent of honeycomb sandwich plates or corrugated paper cardboard. Ultralow weight\, mechanical robustness\, thermal insulation\, as well as chemical and thermal stability of alumina make plate metamaterials attractive for numerous applications\, including structural elements in flying microrobots and interstellar light sails\, high-temperature thermal insulation in energy converters\, photophoretic levitation\, as well as ultrathin sensors and resonators. I will briefly discuss our experimental progress on all these applications\, including demonstrations of extremely robust thermal insulators that can sustain a temperature difference of ~1000 K across a micron-scale gap\, hollow AFM cantilevers that offer greatly enhanced sensitivity and data acquisition rates\, and macroscopic plates that levitate when illuminated by light.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-plate-mechanical-metamaterials-and-their-applications/
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:20200121T150000
DTEND;TZID=America/New_York:20200121T160000
DTSTAMP:20260408T030610
CREATED:20200117T205630Z
LAST-MODIFIED:20200117T205630Z
UID:10006383-1579618800-1579622400@seasevents.nmsdev7.com
SUMMARY:CIS Seminar: "Networked Systems in the Era of Programmable Dataplanes"
DESCRIPTION:Abstract:  \nEmerging networking architectures are allowing for flexible and reconfigurable packet processing at line rate both on the switch and the NIC. Despite their promising new functionality\, programmable switches and NICs are not all-powerful; they have limited state\, support limited types of operations\, and limit per-packet computation to operate at line rate. In this talk\, I will describe how to mask resource limitations using approximation techniques and new scheduling algorithms and how to build a general framework for exposing in-network computing capability to distributed applications. In addition to presenting case studies of optimizing networked systems\, I will reflect on the role of programmable dataplanes in datacenter computing.
URL:https://seasevents.nmsdev7.com/event/cis-seminar-networked-systems-in-the-era-of-programmable-dataplanes/
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:20200122T150000
DTEND;TZID=America/New_York:20200122T160000
DTSTAMP:20260408T030610
CREATED:20191218T151547Z
LAST-MODIFIED:20191218T151547Z
UID:10006349-1579705200-1579708800@seasevents.nmsdev7.com
SUMMARY:CBE Seminar: "Collaboration and Competition Between Active Sheets for Self-Propelled Particles"
DESCRIPTION:Abstract: \nBiological species routinely collaborate for their mutual benefit or compete for available resources\, thereby displaying dynamic behavior that is challenging to replicate in synthetic systems. Here\, we use computational modeling to design microscopic\, chemically active sheets and self-propelled particles encompassing the appropriate synergistic interactions to exhibit bio-inspired “feeding”\, “fleeing” and “fighting”. This design couples two different mechanisms for chemically generating motion in fluid-filled microchambers: solutal buoyancy and diffusiophoresis. Catalyst-coated sheets\, which resemble crabs with four distinct “claws”\, convert reactants in solution into products\, and thereby create local variations in the density and chemical composition of the fluid. Via the solutal buoyancy mechanism\, the density variations generate fluid flows\, which modify the shape and motility of the “crabs”. Concomitantly\, the chemical variations propel the motion of the particles via diffusiophoresis and\, thus\, the crabs’ and particles’ motion becomes highly interconnected. For crabs with restricted lateral mobility\, these two mechanisms can be modulated to either drive a crab to catch and appear to “feed” on all the particles or enable the particles to “flee” from this sheet. Moreover\, by adjusting the sheet’s size and the catalytic coating\, two crabs can compete and “fight” over the motile\, diffusiophoretic particles. Alternatively\, the crabs can temporally “share” resources by shuttling the particles back and forth between themselves. With completely mobile sheets\, four crabs can collaborate to perform a function that one alone cannot accomplish. These findings provide design rules for creating chemically-driven soft robotic sheets that significantly expand the functionality of microfluidic devices.
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-collaboration-and-competition-between-active-sheets-for-self-propelled-particles/
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:20200123T104500
DTEND;TZID=America/New_York:20200123T114500
DTSTAMP:20260408T030610
CREATED:20200120T000818Z
LAST-MODIFIED:20200120T000818Z
UID:10006384-1579776300-1579779900@seasevents.nmsdev7.com
SUMMARY:MSE Faculty Candidate Seminar: "Defect Structure Process Maps for Laser Powder Bed Fusion Additive Manufacturing"
DESCRIPTION:Additive manufacturing (AM) greatly expands the design freedom and near-net shape production of metallic components across multiple length scales. However\, defects arising from starting materials\, processing conditions\, and post-processing may significantly affect the structural integrity and operational performance of metal AM parts. This paper seeks to elucidate common defects and defect formation mechanisms encountered in typical laser powder bed fusion (LPBF) AM processes. While the defect structures of conventional joining processes such as laser welding have been studied extensively\, this talk primarily focuses on the nature of porosity transfer to the finished part exclusively for metal AM powder bed processing techniques. Multiple starting powders and analysis methods are summarized which demonstrate that the manifestation of defects within metal AM builds largely stems from the particular choice of process settings\, with some influence of powder feedstock choice and post-processing heat treatments. Practical build strategies to limit the occurrence of defects by the use of process mapping and geometric modeling are also evaluated utilizing this fundamental understanding of defect formation. Such explorations may enable the validation and calibration of models to permit process qualification without the reliance on costly trial and error type experimentation currently employed.
URL:https://seasevents.nmsdev7.com/event/mse-faculty-candidate-seminar-defect-structure-process-maps-for-laser-powder-bed-fusion-additive-manufacturing/
LOCATION:Auditorium\, LRSM Building\, 3231 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200127T130000
DTEND;TZID=America/New_York:20200127T150000
DTSTAMP:20260408T030610
CREATED:20200122T214621Z
LAST-MODIFIED:20200122T214621Z
UID:10006388-1580130000-1580137200@seasevents.nmsdev7.com
SUMMARY:CBE Dissertation: "DNA Mediated Particle Adhesion"
DESCRIPTION:Advisor: John Crocker\, PhD; Committee Members: Talid Sinno\, PhD; Scott Diamond\, PhD; and Daniel Hammer\, PhD
URL:https://seasevents.nmsdev7.com/event/cbe-dissertation-dna-mediated-particle-adhesion/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Dissertation or Thesis Defense
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200128T103000
DTEND;TZID=America/New_York:20200128T120000
DTSTAMP:20260408T030610
CREATED:20200108T212102Z
LAST-MODIFIED:20200108T212102Z
UID:10006361-1580207400-1580212800@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Liquid Crystal Elastomers"
DESCRIPTION:Liquid crystal elastomers are rubbery solids with liquid crystal mesogens incorporated into their main chains. They display an isotropic to nematic phase transformation accompanied by a large spontaneous deformation. This in turn leads to rich variety of phenomena including ultra-soft behavior\, stripe domains\, shape-morphing etc. Further\, when made as slender structures\, the structural instability of slender structures and the material instabilities of liquid crystal elastomers combine and compete in interesting ways. This talk will provide an introduction to these materials and provide examples from contemporary research about opportunities these materials present.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-liquid-crystal-elastomers/
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:20200128T120000
DTEND;TZID=America/New_York:20200128T130000
DTSTAMP:20260408T030610
CREATED:20200121T211501Z
LAST-MODIFIED:20200121T211501Z
UID:10006385-1580212800-1580216400@seasevents.nmsdev7.com
SUMMARY:MEAM Doctoral Dissertation Defense: "Applications of a Double-stranded Elastic Rod Model to DNA"
DESCRIPTION:In the first part of the presentation\, we discuss a double-stranded elastic rod (birod) model and apply it to study allosteric interactions between two ligands on DNA. Next\, we combine the birod model with statistical mechanics and use it to study the temperature-induced strand separation in dsDNA. \nAllosteric interaction between two ligands on DNA is quantified by measuring the change in free energy of the DNA complex (DNA + two ligands) as a function of the distance between the binding sites for two ligands. We show that trends in the interaction energy of two ligands binding to DNA can be explained using the birod model which accounts for the helical shape of DNA\, elastic deformation of strands and base-pairs\, and the stacking energy due to perturbations in position and orientation of the bases caused by the binding of ligands. The model predicts that the allosteric interaction energy between two ligands decays exponentially with the distance between them and oscillates with the periodicity of the double helix\, which by appropriate parameter fitting is shown to quantitatively match with the experimental measurements. Our model predicts an identical trend (exponentially decaying sinusoid) in the perturbation of groove width produced by the binding of a single ligand—consistent with the published results from molecular simulations. Our analysis provides a new framework to understand allosteric interactions in DNA and can be extended to other rod-like macromolecules whose elasticity plays a key role in their biological functions. \nIn the next part of the presentation\, we combine statistical mechanics with continuum mechanics to predict the mechanical response of DNA molecules. We observe that the external force and torque driven microstructure evolution in DNA leads to force-extension curves that exhibit strong signatures of first-order phase transitions. The effects of the electrostatic interactions on the mechanical-response predicted from the model resolve some important counter-intuitive experimental observations. Next\, we focus on one such structural transition—temperature-driven disintegration of dsDNA into two single strands\, known as DNA melting. We illustrate how the continuum mechanics of birod coupled with statistical mechanics can be used to study the micromechanics of DNA melting. We note that a nonlinear asymmetric interaction between the outer strands leads to a sudden and highly cooperative melting transition. The model enables us to couple the effect of tensile force on the melting temperature\, which to the author’s knowledge is the first mechanics-based attempt to do so. The results from the models\, after suitably choosing the parameter values\, agree with multiple experiments reported in the literature and they generate new falsifiable predictions that can be experimentally tested.
URL:https://seasevents.nmsdev7.com/event/meam-doctoral-dissertation-defense-applications-of-a-double-stranded-elastic-rod-model-to-dna/
LOCATION:4E9\, DRLB\, 209 S. 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Doctoral,Student,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:20200129T150000
DTEND;TZID=America/New_York:20200129T160000
DTSTAMP:20260408T030610
CREATED:20191219T202102Z
LAST-MODIFIED:20191219T202102Z
UID:10006351-1580310000-1580313600@seasevents.nmsdev7.com
SUMMARY:Britton Chance Distinguished Lecture: "Regenerative Immunology: The Role of Technology Translation in Guiding Discovery"
DESCRIPTION:Abstract: \nBiomaterial implants have a long history in the clinic\, but regenerative biomaterials and regenerative medicine therapies\, in general\, have been slow to reach patients. Clinical translation provides a unique and critical opportunity to investigate the key therapeutic drivers of technology efficacy in people. Careful evaluation of clinical outcomes and reevaluation of design parameters is central to improving research and technology development. A key outcome of our clinical translation experiences in orthopedics and plastic surgery was the unexpected discovery of adaptive immune cells around synthetic implants. We are now working to understand the role of the immune system and cellular senescence in the biomaterial response and repair across different tissues. This new therapeutic target serves as the basis for the design of regenerative immunotherapies.
URL:https://seasevents.nmsdev7.com/event/britton-chance-distinguished-lecture-regenerative-immunology-the-role-of-technology-translation-in-guiding-discovery/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Distinguished Lecture
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200130T104500
DTEND;TZID=America/New_York:20200130T114500
DTSTAMP:20260408T030610
CREATED:20200122T203601Z
LAST-MODIFIED:20200122T203601Z
UID:10006387-1580381100-1580384700@seasevents.nmsdev7.com
SUMMARY:MSE Faculty Candidate Seminar: "Structure-property relations in hybrid 2D halide perovskites"
DESCRIPTION:Two-dimensional (2D) hybrid organic-inorganic perovskites are under intense investigation due to their interesting physical properties and superior performance in thin-film based optoelectronic devices. The structural diversity embedded in the system provides a variety of parameters to target favorable properties for applications in photovoltaics (PV) and light emitting diodes (LEDs). In this talk\, Dr. Mao will focus on the structure-property relationships in 2D hybrid perovskite materials\, where large organic cations can be inserted in the structure to increase the stability and structural diversity. First\, she will describe the development of the first completed series of 2D Dion-Jacobson (DJ) hybrid halide perovskites with a general formula A’An-1PbnI3n+1 (A’ = 3-(aminomethyl)piperidinium (3AMP) or 4-(aminomethyl)piperidinium (4AMP)\, A = methylammonium (MA)). The higher layer member (n = 4) has demonstrated good performance\, with the initial power conversion efficiency (PCE) of 7.3% and increased PCE of 12.0% with formamidinium incorporation. Furthermore\, she will introduce another set of hybrid perovskite materials for solid-state lighting applications. The lead bromide-based and mixed bromide/chloride systems have exhibited white-light broad emission and a direct correlation was found between the distortion of the inorganic framework and the emission. Last\, a series of new hybrid double perovskite halide materials are developed as lead-free\, environmentally friendly alternatives. The ability to structurally manipulate 2D hybrid halides catered to the needs opens new avenues for next-generation optoelectronics.
URL:https://seasevents.nmsdev7.com/event/mse-faculty-candidate-seminar-structure-property-relations-in-hybrid-2d-halide-perovskites/
LOCATION:Auditorium\, LRSM Building\, 3231 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Materials Science and Engineering":MAILTO:johnruss@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200131T140000
DTEND;TZID=America/New_York:20200131T150000
DTSTAMP:20260408T030610
CREATED:20191216T195803Z
LAST-MODIFIED:20191216T195803Z
UID:10006347-1580479200-1580482800@seasevents.nmsdev7.com
SUMMARY:PICS Seminar - Dr. Yoichiro Mori of the University of Pennsylvania & the University of Minnesota
DESCRIPTION:Abstract: Mathematical Justification of Slender Body Theory \nSystems in which thin filaments interact with the surrounding fluid abound in science and engineering. The computational and analytical difficulties associated with treating thin filaments as 3D objects has led to the development of slender body theory\, in which filaments are approximated as 1D curves in a 3D fluid. In the 70-80s\, Keller\, Rubinow\, Johnson and others derived an expression for the Stokesian flow field around a thin filament given a one-dimensional force density along the center-line curve. Through the work of Shelley\, Tornberg and others\, this slender body approximation has become firmly established as an important computational tool for the study of filament dynamics in Stokes flow. An issue with slender body approximation has been that it is unclear what it is an approximation to. As is well-known\, it is not possible to specify some value along a 1D curve to solve the 3D exterior Stokes problem. What is the PDE problem that slender body approximation is approximating? Here\, we answer this question by formulating a physically natural PDE problem with non-conventional boundary conditions on the filament surface\, which incorporates the idea that the filament must maintain its integrity (velocity along filament cross sections must be constant). We prove that this PDE problem is well-posed\, and show furthermore that the slender body approximation does indeed provide an approximation to this PDE problem by proving error estimates. This is joint work with Laurel Ohm\, Will Mitchell and Dan Spirn.
URL:https://seasevents.nmsdev7.com/event/pics-seminar-with-dr-yoichiro-mori-of-the-university-of-pennsylvania-the-university-of-minnesota/
LOCATION:PICS Conference Room 534 – A Wing \, 5th Floor\, 3401 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Colloquium
ORGANIZER;CN="Penn Institute for Computational Science (PICS)":MAILTO:dkparks@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20200131T150000
DTEND;TZID=America/New_York:20200131T170000
DTSTAMP:20260408T030610
CREATED:20200109T172444Z
LAST-MODIFIED:20200109T172444Z
UID:10006370-1580482800-1580490000@seasevents.nmsdev7.com
SUMMARY:Thesis Defense: "Multiscale Predictions of Mechanical Response and Computational Circuit Dynamics After Traumatic Brain Injury”
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Dr. David Meaney are pleased to announce the Doctoral Dissertation Defense of David Gabrieli. \nThis event is open to the public.
URL:https://seasevents.nmsdev7.com/event/thesis-defense-multiscale-predictions-of-mechanical-response-and-computational-circuit-dynamics-after-traumatic-brain-injury/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Student,Dissertation or Thesis Defense
END:VEVENT
END:VCALENDAR