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Events for March 07, 2012
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Approximate Message Passing and the Blessing of Dimensionality
Wed, Mar 07, 2012 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Arian Maleki, Ph.D. , Rice University
Talk Title: Approximate Message Passing and the Blessing of Dimensionality
Abstract: The problem of recovering a sparse signal from an underdetermined set of linear equations is paramount in many applications such as compressed sensing, genomics, and machine learning. While significant advances have been made in this area, providing useful insights and intuitions, many important questions are still open including the fundamental performance limits of the recovery algorithms. In this talk, I present a novel sparse recovery algorithm, referred to as approximate message passing (AMP), that uses the âblessing" of large dimensions to solve the $\ell_1$- norm regularized least squares or the LASSO problem very efficiently. In particular, AMP exhibits fast convergence and relies on inexpensive iterations, which renders it suitable for solving high-dimensional problems. Moreover, AMP provides a novel theoretical framework for analyzing the fundamental performance limits of the LASSO, by converting it into a sequence of classical signal plus noise estimation problems. I will show that this new framework settles several fundamental and practically important questions such as the noise sensitivity of the LASSO.
Biography: Arian Maleki received his Ph.D. in electrical engineering from Stanford University under the supervision of Prof. David Donoho in 2010. He then joined the DSP group at Rice University as a postdoctoral scholar. His research interests include massive data analysis, compressed sensing, signal processing, machine learning, and optimization. He received his M.Sc. in statistics from Stanford University, and B.Sc. and M.Sc. both in electrical engineering from Sharif University of Technology.
Host: Professor Antonio Ortega
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
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Astani Civil and Environmental Engineering Seminar
Wed, Mar 07, 2012 @ 01:00 PM - 02:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Speaker: George Ban-Weiss, Postdoctoral Research Associate , Lawrence Berkeley National Lab
Talk Title: Aerosols: From the Tailpipe to Climate Change
Abstract:
Aerosols are fine suspensions of liquid droplets and solid particles that exist in a vast variety of shapes, sizes, and compositions in Earthâs atmosphere. Aerosols can cause adverse health effects, degrade visibility, soil buildings and materials, damage crops, and alter Earthâs energy balance leading to climate change.
Aerosols are known to be an important cause of climate change, but the magnitude of the change is highly uncertain. The effect of aerosols on climate depends on many factors; some particle species cause global warming and some cause cooling. Black carbon aerosols absorb solar radiation and are widely thought to be the second most important cause of global warming after CO2. I will use results from global climate model simulations to show that the climate effect of black carbon is highly dependent on its altitude in the atmosphere. Black carbon at some altitudes can even cause global cooling despite the fact that they increase atmospheric absorption of sunlight.
Motor vehicle emissions are an important source of aerosols. Quantifying vehicle emissions using traditional laboratory methods can be challenging due to the need to extrapolate from a small sample of vehicles to the entire in-use population. This seminar will discuss measured aerosol emissions from a large sample of individual on-road heavy-duty diesel trucks. The statistical distribution of aerosol emissions from diesel trucks (i.e. the relative importance of high-emitters as a source of vehicle-related pollution), and the potential climate implications of diesel particle filter retrofit programs will be explored.
Location: Kaprielian Hall (KAP) - 209 Conference Room
Audiences: Everyone Is Invited
Contact: Evangeline Reyes
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AME Department Seminar
Wed, Mar 07, 2012 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Young W. Kwon, Distinguished Professor. Dept. of Mechanical & Aerospace Engineering. Naval Postgraduate School. Monterey, California, USA. ywkwon@nps.edu
Talk Title: Analysis of Multiscale and Multiphysics Problems
Abstract: In order to better understand the behavior of materials and structures, multiscale and multiphysics analyses are useful and sometimes critical. For example, progressive damage and failure of laminated composite structures can be modeled successfully using the multiscale modeling technique. By doing so, damage and failure in composites can be described in terms of the constituent materials such as fibers and binding matrix regardless of the layer orientation, fiber architecture in each layer, etc. In other words, any damage and failure mode can be described in terms of fiber breakage, matrix cracking, and interface debonding. On the other hand, when a composite structure is in contact with water and subjected to dynamic loading, fluid-structure interaction plays an important role because composite has very comparable density as the water. Therefore, a multiphysics analysis is necessary to understand and predict the structural behavior with fluid-structure interaction. Various multiscale and multiphysics problems are presented.
Host: Prof. Veronica Eliasson
More Info: http://ae-www.usc.edu/seminars/index.shtml#upcomingLocation: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ae-www.usc.edu/seminars/index.shtml#upcoming
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Workshop: Have a lot of work to do during Spring Break?
Wed, Mar 07, 2012 @ 05:00 PM - 06:00 PM
Viterbi School of Engineering Student Affairs
Workshops & Infosessions
Did you get behind on your homework during midterms? Drowning under piles of readings? Stressed about papers and assignments due right after spring break?
Spend this time making a plan for meeting your deadlines, catching up on readings, and building in some downtime for yourself!
Be sure to bring your class syllabi and planner to get the most out of this workshop.
Presented by the USC Kortschak Center for Learning and Creativity and the Viterbi Academic Resource Center.Location: Ronald Tutor Hall of Engineering (RTH) - 211
Audiences: Undergrad
Contact: Christine D'Arcy
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EWB Corral de Piedras (CDP) Project Meeting
Wed, Mar 07, 2012 @ 05:30 PM - 06:30 PM
Viterbi School of Engineering Student Organizations
University Calendar
Come join EWB's Corral de Piedras (CDP) Project Meetings! In CDP, we are building a rainwater catchment system on a schoolhouse for the kids to drink water during school, with plans on expanding the system further.
Questions/Comments? Feel free to email us at EWB@usc.edu!
*Note: Location is listed as "KAP" and it just means to meet in the lobby and we'll find a room together! It's usually KAP 164 or the few rooms around it. See you there!
After the meeting, join us for dinner for our first Social Event! Free Honduran Food and free EWB love!Location: Kaprielian Hall (KAP) - Lobby
Audiences: Everyone Is Invited
Contact: Engineers Without Borders (EWB)
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EWB First Social Event! - CANCELLED
Wed, Mar 07, 2012 @ 06:00 PM - 07:00 PM
Viterbi School of Engineering Student Organizations
Student Activity
CANCELLED!
Join us while we reveal bigs and littles over some Honduran Food!
Everyone is invited even if you didn't request a big/little! Great way to get involved and meet new people!
We will also be handing out EWB T-shirts!
Free dinner and EWB love!
Questions/Comments? Email ewb@usc.eduLocation: Grace Ford Salvatori Hall Of Letters, Arts & Sciences (GFS) - 118
Audiences: Everyone Is Invited
Contact: Engineers Without Borders
