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Events for February 14, 2007
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The Economics of Multimedia
Wed, Feb 14, 2007 @ 11:00 AM - 11:50 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
The Economics of MultimediaDr. Darko Kirovski
Microsoft ResearchAbstract:
Researchers often forget that "Content is King," that the technical world of multimedia is built around popular multimedia content, not the other way around. With an emphasis on economics, I will overview a recently proposed economic ecosystem for building an incentive-based off-line market for digital media. In the system, anyone can buy or sell digital media anywhere, anytime. Transactions are executed via a tamper-resistant media player equipped with a short-distance wireless, e.g. iPod + WiPAN. Most importantly, transaction revenues are split so that one part goes to the rightful copyright holder and the remainder to the seller as an incentive. The proposed viral marketing network has an objective to: 1) improve the profits of copyright owners by reduction in operation costs and improved media availability, and 2) satisfy a sophisticated set of usability and economic requirements end-users may have. The new system creates two important research directions: design of a secure, atomic transaction protocol and modeling of the proposed ecosystem to explore the effect of key pricing, delivery, networking, and marketing strategies. In a prelude to the technical part of his talk, I will first overview several ongoing projects at Microsoft Research related to multimedia.Short Bio of Speaker:
Darko Kirovski received a Ph.D. in computer science from the University of California, Los Angeles, in 2001. Since April 2000, he has been a researcher at Microsoft Research. His research interests span over several systems research areas: multimedia processing and economics, counterfeit deterrents, security, biometrics, reliable computing, and embedded system design. He has received the 1999 Microsoft Graduate Research Fellowship, the 2000 ACM/IEEE Design Automation Conference Graduate Scholarship, the 2001 ACM Outstanding Ph.D. Dissertation Award in Electronic Design Automation, the Best Paper Award at ACM Multimedia 2002, and co-authored a Best Student Paper at MMSP 2006 with Shan He. Darko has authored over 90 journal and conference papers and filed over 30 patents.Host C.-C. Jay Kuo, x04658Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
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Preparing for the Engineering Career Fair
Wed, Feb 14, 2007 @ 12:00 PM - 12:50 PM
Viterbi School of Engineering Career Connections
Workshops & Infosessions
Make a great first impression! Learn how to optimize your time, approach employers and prepare for the recruiting event of the semester.
Location: Ronald Tutor Hall of Engineering (RTH) - 109
Audiences: Everyone Is Invited
Contact: RTH 218 Viterbi Career Services
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Behavior of Pile Foundations in Liquefied and Laterally Spreading Ground
Wed, Feb 14, 2007 @ 02:00 PM - 03:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Speaker:
Prof. Scott Brandenberg,
Department of Civil and Environmental Engineering,
UCLAAstract:Structures founded on pile foundations have suffered extensive damage due to earthquake-induced liquefaction and lateral spreading. Damage has been particularly intense when a relatively strong nonliquefied crust layer spreads laterally on top of an underlying liquefiable deposit and exerts large loads on the pile foundations. Lateral spreading hazard poses a large problem for bridges because (1) bridges often cross bodies of water and are founded in a profile consisting of a sloping nonliquefied crust over liquefiable sand, (2) many bridges were constructed before liquefaction and lateral spreading was identified as a hazard to be considered in design, and (3) current design methods have not been sufficiently verified by case histories and model studies. This talk presents a suite of centrifuge studies of pile foundations embedded in a gently sloping profile of nonliquefied clay over liquefiable loose sand over dense sand. The densely instrumented models provide insights into the fundamental mechanisms of load transfer between piles and liquefiable sand, and between pile caps and nonliquefied spreading crusts. The data show how dilatancy (i.e. cyclic mobility) of liquefiable sand affects soil-pile interaction, and how passive loads of laterally spreading crusts are mobilized against pile groups at displacements that are about an order of magnitude larger than observed in tests in nonliquefied soil profiles. Observations from the centrifuge tests led to improved design guidelines for static beam on nonlinear Winkler foundation (BNWF) analyses that are commonly used in design practice. Analyses that utilize the guidelines are shown to reasonably predict pile cap displacements and peak bending moments for cases where the pile groups were laterally stiff to limit damage to the structure. The talk ends with discussion of preliminary results from an ongoing project to develop fragility functions that characterize lateral spreading hazard for approximately 13,000 Caltrans bridges, many of which were not designed to resist lateral spreading loads.Location: Kaprielian Hall (KAP) - rielian Hall 203
Audiences: Everyone Is Invited
Contact: Evangeline Reyes
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Walk-In Wednesdays: Career Services Advising
Wed, Feb 14, 2007 @ 02:00 PM - 04:00 PM
Viterbi School of Engineering Career Connections
Student Activity
Please feel free to come in during these walk-in hours! No appointment is necessary. Come in for resume reviews, internship information, or general engineering career advice.
Location: Ronald Tutor Hall of Engineering (RTH) - 218
Audiences: Current Engineering Students
Contact: RTH 218 Viterbi Career Services
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Nonlinear Dynamics of Multi-Mesh Gear Systems
Wed, Feb 14, 2007 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Prof. Robert ParkerDepartment of Mechanical EngineeringOhio State UniversityGear vibration dominates helicopter cabin noise, which can exceed 110 dB. Gear vibration is a major concern in numerous other applications including aerospace, automotive, wind turbines, high-speed machinery, manufacturing, and more. Despite gears' long history, scientific study of their dynamics has been concentrated in the last 40 years, and the pervasive impact of nonlinearities and parametric instability in gear vibration has been realized only in the last decade. Mathematical models are emerging to incorporate these critical aspects. Planetary gears and other systems having multiple interacting tooth meshes exhibit especially interesting dynamics that remain largely unexplored. Nonlinearity from tooth contact loss and parametric instability from varying contact conditions as the gears rotate are essential features of complex phenomena observed in practice. After giving industrial examples motivating the research, the presentation will focus on modeling and analysis of the nonlinear dynamics of planetary gears using asymptotic and finite element/contact mechanics methods. In addition to illustrating and explaining the rich range of nonlinear dynamics that emerge, the analytical approximations generate results with clear practical implications. An ambitious $2.1M experimental gear dynamics program with specialized facilities that are unique worldwide will also be discussed.Professor Robert Parker has been at the Ohio State Department of Mechanical Engineering since 1996. He received his M.S. and Ph.D. degrees from the University of California, Berkeley. His research investigates problems on the dynamics, vibration, and stability of mechanical systems with particular focus on high-speed devices. He has held visiting research appointments at INSA Lyon (France), Risoe National Lab (Denmark), NASA Glenn Research Center, the University of Technology-Sydney, and Tokyo University. He worked for two years in the Spacecraft Dynamics division of The Aerospace Corporation in Los Angeles. He consults internationally on vibration problems in numerous industries.Prof. Parker has received over $5M of research funding from the National Science Foundation, U.S. Army Research Office, NASA, National Rotorcraft Technology Center, General Motors, Ford, Boeing, Sikorsky, and other companies. Prof. Parker is a Fellow of ASME and AAAS. He was one of a select group invited to National Academy of Engineering Frontiers of Engineering Symposia in the US and Germany. He received the Presidential Early Career Award for Scientists and Engineers (PECASE) in 1999, which is "the highest honor awarded by the U.S. government to scientific researchers early in their careers," as well as the NSF CAREER and Army Young Investigator Awards.
Location: Seaver Science Library, Rm 150
Audiences: Everyone Is Invited
Contact: April Mundy
