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SUNMONTUEWEDTHUFRISAT
Events for November 04, 2010
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Seminar by Dr. Michael Fritze
Thu, Nov 04, 2010 @ 01:00 PM - 02:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Michael Fritz, USC Information Sciences Institute
Talk Title: New Research Opportunities Enabled by Fabless Access to Foundry Technologies
Abstract: The tremendous progress in electronics we have experienced over the past several decades has been enabled to a large extent by fables access to advanced foundry CMOS technologies. By abstracting the details of the fabrication process into a set of âdesign rulesâ supported by accurate models, large sets of creative designers were able to access the powerful capabilities of an advanced CMOS fabrication technology. The USC-ISI âMOSISâ organization was one of the pioneers in this area through its introduction of cost-sharing access to CMOS using the âmulti-projectâ fabrication service paradigm.
It is now time to extend this paradigm of fables access to chip fabrication technologies beyond conventional CMOS. Traditional scaling approaches that have enabled âMoores Lawâ progress in the past are beginning to run out of steam. Disruptive new technologies are emerging including 3DIC, photonics, compound semiconductors, non-volatile memories and carbon electronics to name just a few. This talk will discuss the unique challenges of implementing a fables access model for these novel technologies analogous to the one being used for standard CMOS today. Some of the unique challenges in achieving such a goal along with some potential new research directions enabled by such a new foundry access model will also be discussed.
Biography: Mike Fritze obtained a PhD from Brown University in 1992. After a postdoc in the Advanced Photonics Group at Bell Laboratories, Holmdel, he joined MIT Lincoln Laboratory where he conducted research associated with enhancements to optical lithography resolution, silicon on insulator transistors, and silicon on insulator integrated optics. From 2006 to 2010 he was a DARPA program manager with initiatives in low-power electronics, micro-fabrication, and RF-Electronics. In 2010 he became Director of the Disruptive Electronics Division of the Information Sciences Institute at USC.
Host: Dr. Levi
Location: Hedco Petroleum and Chemical Engineering Building (HED) - 116
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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Photonics Seminar Series
Thu, Nov 04, 2010 @ 01:00 PM - 02:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Koray Aydin, California Institute of Technology
Talk Title: Extending the Photonics Toolbox with Plasmonic Super Absorbers and Active Optical Metamaterials
Abstract: Plasmonic nanostructures and metamaterials are poised to revolutionize optical engineering by overcoming fundamental challenges in optical materials. Dr. Aydin will first introduce ultrathin plasmonic super absorbers consisting of reflective metals and transparent dielectric and enabling broadband, polarization-independent resonant light-absorption. Plasmonic super absorbers could find applications for light harvesting and photon management in photovoltaic and thermophotovoltaic cells. Then, Dr. Aydin will present the first experimental demonstration of active infrared metamaterials composed of hybrid metal-vanadium dioxide (VO2) split-ring resonators. Drastic changes in the optical properties of VO2 with the phase transition enable control over the transmission and reflection properties of nanophotonic structures. Finally, Dr. Aydin will introduce tunable, stretchable optical metamaterials that enable resonant line-width tuning and amplitude modulation of metamaterial and Fano resonances upon applying mechanical actuation to the polymeric metamaterial. This device is the first mechanically tunable metamaterial in the near infrared, where modifying the distance between coupled resonator elements drastically changes the resonance frequency by a line-width (~400 nm). At the end, Dr. Aydin will propose reconfigurable bio-sensors that relies on the active control of the metamaterial substrates for field-enhanced infrared absorption spectroscopy.
Biography: Koray Aydin is currently a postdoctoral research scholar in Applied Physics at California Institute of Technology. Dr. Aydinâs research in the group of Harry Atwater has focused on the experimental and theoretical investigation of active plasmonic nanostructures and metamaterials and their applications in solar energy conversion and bio-sensing. He received his Ph.D. degree in Physics from the Department of Physics at Bilkent University, Ankara, Turkey under the supervision of Ekmel Ozbay. During his PhD, he investigated the novel electromagnetic phenomena, such as negative refraction, superlensing and enhanced transmission, in microwave metamaterials and photonic crystals. Dr. Aydin has authored more than 45 SCI-Index journal publications that are cited more than 1300 times. He is a member of the professional societies of OSA, APS, IEEE, MRS and SPIE and the recipient of 2007 SPIE Educational Scholarship.
Host: Prof. Povinelli, and Jing Ma
More Info: http://ee.usc.edu/news/seminars/photonics/Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Jing Ma
Event Link: http://ee.usc.edu/news/seminars/photonics/
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Sparsity-Cognizant Total Least-Squares for Perturbed Compressive Sampling
Thu, Nov 04, 2010 @ 03:00 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Geert Leus, Delft University of Technology
Talk Title: Sparsity-Cognizant Total Least-Squares for Perturbed Compressive Sampling
Abstract: Solving linear regression problems based on the total
least-squares (TLS) criterion has well-documented merits in various
applications, where perturbations appear both in the data vector as well as
in the regression matrix. However, existing TLS approaches do not account
for sparsity possibly present in the unknown vector of regression
coefficients. On the other hand, sparsity is the key attribute exploited by
modern compressive sampling and variable selection approaches to linear
regression, which include noise in the data, but do not account for
perturbations in the regression matrix. In this presentation, we fill this
gap by formulating and solving TLS optimization problems under sparsity
constraints. Near-optimum and reduced-complexity suboptimum sparse (S-) TLS
algorithms are developed to address the perturbed compressive sampling (and
the related dictionary learning) challenge, when there is a mismatch between
the true and adopted bases over which the unknown vector is sparse. The
novel S-TLS schemes also allow for perturbations in the regression matrix of
the least-absolute selection and shrinkage selection operator (Lasso), and
endow TLS approaches with ability to cope with sparse, under-determined
errors-in-variables models. Interesting generalizations can further exploit
prior knowledge on the perturbations to obtain novel weighted and structured
S-TLS solvers. Analysis and simulations demonstrate the practical impact of
S-TLS in calibrating the mismatch effects of contemporary grid-based
approaches to cognitive radio sensing, and robust direction-of-arrival
estimation using antenna arrays.
Biography: Geert Leus was born in Leuven, Belgium, in 1973. He received the
electrical engineering degree and the PhD degree in applied sciences from
the Katholieke Universiteit Leuven, Belgium, in June 1996 and May 2000,
respectively. He has been a Research Assistant and a Postdoctoral Fellow of
the Fund for Scientific Research - Flanders, Belgium, from October 1996 till
September 2003. During that period, Geert Leus was affiliated with the
Electrical Engineering Department of the Katholieke Universiteit Leuven,
Belgium. Currently, Geert Leus is an Associate Professor at the Faculty of
Electrical Engineering, Mathematics and Computer Science of the Delft
University of Technology, The Netherlands. During the summer of 1998, he
visited Stanford University, and from March 2001 till May 2002 he was a
Visiting Researcher and Lecturer at the University of Minnesota. His
research interests are in the area of signal processing for communications.
Geert Leus received a 2002 IEEE Signal Processing Society Young Author Best
Paper Award and a 2005 IEEE Signal Processing Society Best Paper Award. He
is the Chair of the IEEE Signal Processing for Communications Technical
Committee, and an Associate Editor for the IEEE Transactions on Signal
Processing and the EURASIP Journal on Applied Signal Processing. In the
past, he has served on the Editorial Board of the IEEE Signal Processing
Letters and the IEEE Transactions on Wireless Communications.
Host: Prof. Urbashi Mitra, ubli@usc.edu, x0-4667
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
