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Events for April 22, 2010
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A Bayesian Network Framework for Seismic Infrastructure Risk Assessment & Decision Support
Thu, Apr 22, 2010 @ 01:00 PM - 02:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Title: Speaker: Michelle T. Bensi, Ph.D. Candidate, University of California, BerkeleyAbstract:A Bayesian network (BN) is a probabilistic graphical model that represents a set of random variables and their probabilistic dependencies. The variables may represent demand or capacity values, or the states of components and systems. BNs are graphical and intuitive, facilitate information updating, can be used for identification of critical components within a system, and can be extended by decision and utility nodes to solve decision problems. In particular, the facility for information updating renders the BN an ideal tool for infrastructure risk assessment and decision support. Evidence on one or more variables (e.g. observed component capacities, demands, or states) can be entered into the BN and this information propagates throughout the network to provide an up-to-date probabilistic characterization of the performance of an infrastructure system under an evolving state of information.This presentation will begin with a brief introduction to BNs. Next, a broad overview of a BN framework for infrastructure seismic risk assessment and decision support will be presented. Components of the framework include: (1) a seismic demand model of ground motion intensity as a spatially distributed Gaussian random field accounting for finite fault rupture and directivity effects, (2) models of component performance, (3) models of system performance, and (4) the extension of the BN to include decision and utility nodes to aid post-earthquake decision-making. Like all computational methods, BNs have limitations. In particular, calculations in BNs can be highly demanding of computer memory. A discussion of work done to address this limitation will be presented. An illustrative example will demonstrate the main ideas and approach. The presentation will conclude with a broader discussion of the use of BNs for modeling hazards, processing information, and aiding decision making with the goal of improving infrastructure system performance and reliability
Location: Kaprielian Hall (KAP) - 209
Audiences: Everyone Is Invited
Contact: Evangeline Reyes
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Nanoelectronics in Retrospect, Prospect, and Principle
Thu, Apr 22, 2010 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Dr. James D. Meindl - Professor of Microelectronics, Georgia Institute of TechnologyThe information revolution has been the paramount economic development of the past five decades. Its principal driver has been silicon microchip technology, which has advanced in productivity by a factor of approximately one billion and in performance, for example of a microprocessor chip, by a factor of nearly one million. These concurrent advances have been implemented by a synergistic fusion of top-down directed assembly microtechnology (or scaling currently to the 25-50 nm range) and bottom-up self assembly nanotechnology producing 300 mm diameter single crystal ingots of silicon. CMOS dynamic power-delay product is projected to continue to benefit from scaling but static gate tunneling current and subthreshold channel leakage current, device parameter manufacturing tolerances and interconnect latency, severely aggravated by resistivity increases due to size effects in copper, progressively degrade from scaling. Consequently, novel ancillary technologies including: 1) increased chip input/output (I/O) interconnect density providing improved electrical and optical I/O bandwidth; 2) enhanced heat removal, for example through microchannel fluidic cooling; and 3) 3D chip stacking with through silicon vias to reduce multi-core microprocessor to off-chip cache memory interconnect lengths are now projected as critical means of prolonging the exponential rate of advance of silicon microchip technology. Following anticipated saturation of this advance early in the 2020 decade, a new genre of nanoelectronics is a coveted goal and one leading candidate appears to be graphene, particularly due to its ballistic carrier transport, adjustable energy band gap of nanoribbons, susceptibility to fusion of top-down and bottom-up nanotechnology and potential for 3D monolithic integration. However, we have not yet witnessed in graphene the 21st century equivalents of two Nobel Prize winning inventions, the transistor and the integrated circuit. Dr. Meindl is the founding Director of the Marcus Nanotechnolgy Research Center, Director of the Pettit Microelectronics Research Center and Pettit Chair Professor at the Georgia Institute of Technology. In 2007 Meindl was awarded Eminent Member of Eta Kappa Nu. He is a Life-Fellow of the IEEE, and a member of the American Academy of Arts and Sciences and the National Academy of Engineering. Meindl received the 2006 IEEE Medal of Honor, the 2004 SRC Aristotle Award, first place on the 2003 IEEE International Solid State Circuits Conference 50-Year Anniversary Author Honor Roll, and the 1999 SIA University Research Award. He received his bachelor's, master's, and doctor's degrees in electrical engineering, from the Carnegie Institute of Technology (Carnegie Mellon University).
Location: Seeley G. Mudd Building (SGM) - 101
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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CS Colloq: Augustin Chaintreau
Thu, Apr 22, 2010 @ 03:30 PM - 05:00 PM
Thomas Lord Department of Computer Science
Conferences, Lectures, & Seminars
Talk Title: Addressing the Mobile Social Data DelugeSpeaker: Dr. Augustin ChaintreauHost: Prof. Ramesh GovindanAbstract: Extracting the full economic and scientific value of the "data deluge", which follows from the information produced and consumed online by individuals, is redefining the frontier of computer science.
Five years after one of the first experiments on mobile social dynamics, the size and scope of data collected or accessed through mobile devices have increased dramatically. In this talk, it is argued that understanding and releasing the potential of mobile social networks is possible provided that three key challenges are addressed: the lack of a guiding theory, the need to design algorithms exploiting social properties, and the presence of entities with competing goals.
Although these broad challenges are likely to exist for some time, this talk presents three examples in which these issues are addressed, using new analytical and algorithmic tools, to improve the efficiency of information dissemination.Bio: A. Chaintreau graduated in 2006 from Ecole Normale Superieure, Paris. He joined Technicolor (previously known as Thomson) to contribute to the creation of a new research lab on advanced communication platforms, where his research deals with mobile and social dynamics in information systems. Prior to that, he worked at Intel Research Cambridge where he was involved in conducting the first measurement campaign of opportunistic mobile dissemination. During his Ph.D, made under the supervision of Francois Baccelli, he worked with Alcatel Bell, and the IBM Watson T.J. Research Center, on characterizing scalable resource sharing systems in the presence of fairness and reliability constraints.
Location: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: CS Front Desk
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EPSTEIN ISE ANNUAL SPRING BANQUET
Thu, Apr 22, 2010 @ 05:00 PM - 08:00 PM
Daniel J. Epstein Department of Industrial and Systems Engineering
University Calendar
Daniel J. Epstein Department of Industrial and Systems Engineering Students, Faculty, and Staff: Annual Spring Banquet - Thursday, April 22, 2010. 5:00-8:00 PMUSC Davidson Conference Center – Embassy Room, 3415 South Figueroa Street, (Corner of Figueroa and Jefferson), Los Angeles, CA 90089-0871, Tel: 213-740-5956Your Evening Includes: Reception (Cash Bar), Three Course Dinner, Awards, and Distinguished Guest Speaker - Doug Failing, Executive Director, Highway Programs & Interim Chief Planning Officer, Los Angeles MetroEveryone is encouraged to attend; this is a great opportunity for students, faculty and staff to socialize (business casual please)Dinner is $15; please make payments to Georgia in GER 240A and indicate one main course option: beef, fish or vegetarian when making paymentRSVP to Georgia at (213) 740-4885 or glum@usc.edu by April 15, 2010.
Location: Charlotte S. & Davre R. Davidson Continuing Education Conference Center (DCC) - Embassy Room
Audiences: Everyone Is Invited
Contact: Georgia Lum
