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SUNMONTUEWEDTHUFRISAT
Events for November 06, 2007
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Surface Flattening and Developable Freeform Surface Modeling
Tue, Nov 06, 2007 @ 03:30 PM - 04:30 PM
Daniel J. Epstein Department of Industrial and Systems Engineering
University Calendar
DANIEL J. EPSTEIN DEPARTMENT OF INDUSTRIAL AND SYSTEMS ENGINEERING SEMINAR"Surface Flattening and Developable Freeform Surface Modeling"Charlie C.L. Wang, Ph.D.Assistant Professor, Department of Mechanicaland Automation Engineering, Chinese University of Hong KongABSTRACT: The research presented in this talk is motivated by the development of 3D design automation systems for freeform products in those industries where the products are fabricated from two-dimensional patterns of sheet material (e.g., metal in ship industry, fabric in apparel industry and toy industry, and leather in shoe industry and furniture industry). How to determine the shape of 2D pieces from given 3D surface patches now becomes the bottleneck problem of the modeling cycle. An energy minimization based surface flattening technique will firstly be introduced to solve this problem. The surface flattening is later equipped with a novel signature – Length-Preserved Free Boundary (LPFB) so that a given model can be segmented into quasi-developable patches and flattened. Computing the 3D/2D mapping is also formulated as a problem for modeling developable freeform surfaces, where a novel Flattenable Laplacian (FL) mesh modeling scheme will be introduced. Lastly, the speaker will present how a woven fitting based surface flattening technique is conducted in the geometric design of custom-made medical assistant braces. TUESDAY, NOVEMBER 6, 2007, GERONTOLOGY BUILDING (GER) ROOM 309, 3:30-4:30 PM------------------BIOGRAPHY: Dr. Charlie C.L. Wang received his B.Eng. degree (1998) in mechatronics engineering from the Huazhong University of Science and Technology, his M.Phil. degree (2000) and Ph.D. degree (2002) in mechanical engineering from the Hong Kong University of Science and Technology. Since 2003, he has been an Assistant Professor at the Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong. Dr. Wang is a member of IEEE and ASME, an editorial board member of International Journal of Virtual Reality, and a guest editor of international journals Computer-Aided Design and Computers in Industry. His current research interests include geometric modeling in computer-aided design and manufacturing, biomedical engineering, and computer graphics, as well as computational physics in virtual reality, which leads to over 60 academic papers published in the relevant areas and the Best Paper Award from ASME DETC/CIE 2001 conference. Dr. Wang has served in program committee of various major international conferences including ACM Symposium on Solid and Physical Modeling 2007, ACM Symposium on Virtual Reality Software & Technology 2007, International CAD Conference 2005 to 2008, and International Conference of Geometric Modeling and Processing 2006 and 2008, etc.
Location: Ethel Percy Andrus Gerontology Center (GER) - 309
Audiences: Everyone Is Invited
Contact: Georgia Lum
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CS Colloquia: Expanders and Extractors from Parvaresh-Vardy Codes
Tue, Nov 06, 2007 @ 04:00 PM - 05:30 PM
Thomas Lord Department of Computer Science
Conferences, Lectures, & Seminars
Title: Expanders and Extractors from Parvaresh-Vardy CodesSpeaker: Prof. Chris Umans(CALTECH)ABSTRACT:
Expanders and extractors are fundamental combinatorial objects with
a wide variety of applications in theoretical computer science.In this work we give the best-to-date explicit construction of highly
unbalanced bipartite expander graphs with expansion arbitrarily
close to the degree. Our expanders have a short and self-contained
description and analysis, based on the ideas underlying the recent
list-decodable
error-correcting codes of Parvaresh and Vardy (FOCS `05).Our expanders can be interpreted as near-optimal ``randomness
condensers,'' that reduce the task of extracting randomness from
sources of arbitrary min-entropy rate to extracting randomness
from sources of min-entropy rate arbitrarily close to 1, which is
a much easier task. Using this connection, we obtain a new
construction of randomness extractors that is optimal up to
constant factors, while being much simpler than the previous
construction of Lu et al. (STOC `03) and improving upon it when
the error parameter is small.Joint work with Venkat Guruswami and Salil Vadhan.BIO:
Chris Umans received his Ph.D. in Computer Science from Berkeley in 2000.
After spending two years as a postdoc in the Theory Group at Microsoft
Research, he joined the Computer Science faculty at Caltech in 2002. His
research interests are in theoretical computer science, especially complexity
theory. He is the recipient of an NSF CAREER award, an Alfred P. Sloan
Research Fellowship, and two CCC Best Paper Awards.Location: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: CS Colloquia
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VSC General Meeting
Tue, Nov 06, 2007 @ 05:00 PM - 06:00 PM
Viterbi School of Engineering Student Organizations
Student Activity
Want to get involved with Viterbi? Interested in knowing about upcoming events for engineering students? Attend the Viterbi Student Council general meeting to learn about the activities that Viterbi student organization leaders are planning for YOU!
Location: Norman Topping Student Activities Center (TSC) - 205
Audiences: Everyone Is Invited
Contact: Viterbi Student Council (VSC)
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Viterbi Book Club
Tue, Nov 06, 2007 @ 05:00 PM - 06:00 PM
Viterbi School of Engineering Student Affairs
Student Activity
The Viterbi Book Club is open to all Viterbi undergraduate students. If you are interested in participating, please email viterbi.kiuel@usc.edu.
Location: Ronald Tutor Hall of Engineering (RTH) - 110
Audiences: Viterbi Undergraduate Students
Contact: Tisha Armatys
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Hewlett Packard Information Session
Tue, Nov 06, 2007 @ 05:30 PM - 07:00 PM
Viterbi School of Engineering Career Connections
Workshops & Infosessions
Join representatives of this company as they share general company information and available work opportunities.
Location: Seeley G. Mudd Building (SGM) - 124
Audiences: All Viterbi Students
Contact: RTH 218 Viterbi Career Services
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IEEE General Meeting - Quantum Computers
Tue, Nov 06, 2007 @ 06:00 PM - 07:00 PM
Viterbi School of Engineering Student Organizations
Student Activity
IEEE General Meeting
Dr. Todd Brun
Quantum Computers
Tuesday, Nov. 6, 6pm, SOS B46 Abstract:
One of the most exciting ideas for a new computing paradigm has been developed over the last ten or fifteen years: quantum computing, in which a computer built to exploit the properties of quantum mechanics can solve certain problems in radically new (and more efficient) ways. It has been shown that quantum computers can (in principle) factor large numbers efficiently, which would enable them to break the popular RSA public-key encryption protocol; quantum communications can also be used to produce unconditionally secure transmissions. We will briefly review the basic idea of a quantum computer, and look quickly at the current state of theory and experiment. Finally we will speculate about other problems that might be solved by a future generation of quantum computers. Bio:
Todd Brun received an A.B. in Physics from Harvard University in 1989 and a Master's and Ph.D. in Physics from Caltech in 1991 and 1994. Since then he has held positions at the University of London, the Institute for Theoretical Physics in Santa Barbara (now the Kavli Institute), Carnegie Mellon University, and the Institute for Advanced Study in Princeton. He is currently an Associate Professor in the Ming Hsieh Department of Electrical Engineering and the University of Southern California, and the Associate Chair of the department. He works on various aspects of quantum theory, with a particular emphasis on quantum computing and quantum information processing.Location: Social Sciences Building (SOS) - B46
Audiences: Everyone Is Invited
Contact: Institute of Electrical and Electronics Engin
