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SUNMONTUEWEDTHUFRISAT
Events for November 12, 2010
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Signal and Image Processing seminar
Fri, Nov 12, 2010 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Maurizio Omologo, Fondazione Bruno Kessler-irst, Trento, Italy
Talk Title: A Prototype of a Distant-talking Interface for Control of Interactive TV
Abstract: This talk aims to describe the goals, challenges, and main achievements of the DICIT EC project, which was coordinated by FBK-irst during the last four years.
The project addressed the development of a multi-modal user-friendly interface for control of SetTopBox, TV, and related services. The interface includes a microphone array to support distant-talking voice input with multiple active speakers. The front-end processing component feeds a chain including speech recognition, natural language understanding, and spoken dialogue management components. The resulting prototype was replicated at several sites and evaluated by 170 users. The results of this campaign showed the effectiveness of the adopted solution as well as potential for future development of real smart-space applications.
During the talk, a brief overview will also be given on the other research activities being conducted under the SHINE group of FBK-irst.
Biography: Maurizio Omologo is the head of the SHINE (Speech-acoustic scene analysis and interpretation) research unit of Fondazione Bruno Kessler-irst, Trento, Italy. He has also been teaching "Audio Signal Processing" at the University of Trento since 2001. His current research interests include Audio and Speech Processing, Acoustic Scene Analysis, and Automatic Speech Recognition, in particular for distant-talking scenarios. Between 2006 and 2009, he acted as Project Manager of the DICIT (Distant-talking Interfaces for Control of Interactive TV) European Project.
Host: Professor Shrikanth Narayanan
Location: Ronald Tutor Hall of Engineering (RTH) - 320
Audiences: Everyone Is Invited
Contact: Mary Francis
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Quantifying and Achieving the Capacity of Wireless 1-Hop Network Coding — A Code-Alignment-Based Approach
Fri, Nov 12, 2010 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Chih-Chun Wang, Purdue University
Talk Title: Quantifying and Achieving the Capacity of Wireless 1-Hop Network Coding â A Code-Alignment-Based Approach
Abstract: One-hop wireless network coding mixes packets of multiple unicast sessions, which has drawn significant attentions in the system-level wireless networking community due to its inherent low complexity of operating within a local neighborhood. One such representative scheme is the ``XOR in the airâ scheme for the wireless cross topologies.
In this talk, we show that despite of the notorious difficulty of characterizing the capacity region of intersession network coding for general wireline networks, the problem becomes more tractable in a 1-hop wireless environment. In particular, we quantify the Shannon capacities of the ``XOR in the airâ scheme by deriving new outer and inner bounds that meet in almost all practical scenarios. The new capacity-achieving schemes are based on the concept of ``code alignment,â a new interference alignment technique in the finite field. The capacity results enable direct and comprehensive comparison of the throughput benefits of network coding and those of other competing techniques, such as cross-layer optimization and opportunistic routing. The capacity results can also be used as a benchmark for evaluating the efficiency of practical protocols.
This is a joint work with Wei-Cheng Kuo, Abdallah Khreishah (Temple University), and Ness Shroff (The OSU).
Biography: Chih-Chun Wang is currently an Assistant Professor of the School of Electrical and Computer Engineering of Purdue University. He received the B.E. degree in E.E. from National Taiwan University, Taipei, Taiwan in 1999, the M.S. degree in E.E., the Ph.D. degree in E.E. from Princeton University in 2002 and 2005, respectively. He worked in Comtrend Corporation, Taipei, Taiwan, as a design engineer in 2000 and spent the summer of 2004 with Flarion Technologies, New Jersey. In 2005, he held a post-doctoral researcher position in the Electrical Engineering Department of Princeton University. He joined Purdue University as an Assistant Professor in 2006. His current research interests are in the graph-theoretic and algorithmic analysis of iterative decoding and of network coding. Other research interests of his fall in the general areas of networking, optimal control, information theory, detection theory, and coding theory.
Dr. Wang received the National Science Foundation Faculty Early Career Development (CAREER) Award in 2009.
Host: Alex Dimakis, dimakis [at] usc
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
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Integrated Systems Seminar Series
Fri, Nov 12, 2010 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Azita Emami, CALTECH
Talk Title: Low Power Data Communication Circuits for Advanced Integrated Systems
Host: Prof. Hashemi
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
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Towards High Performance III-V Semiconductor Nanowire and Tube Based Devices
Fri, Nov 12, 2010 @ 02:30 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Xiuling Li, Assistant Professor, Department of Electrical and Computer Engineering, University of Illinois, Urbana-Champaign
Talk Title: Towards High Performance III-V Semiconductor Nanowire and Tube Based Devices
Abstract: This talk focuses on two types of III-V compound semiconductor nanotechnology building blocks and their applications in nanoelectronics and nanophotonics: nanowires and self-rolled-up tubes.
Interest in semiconductor nanowires have increased exponentially over the past decade because of their unique optical and electrical properties. Integration of semiconductor nanowire based devices has been challenging for vertical nanowire devices since ex-situ assembly techniques are required to align planar nanowire devices. I will present our discovery of a type of nanowires that is planar, self-aligned, twin-defect free, high carrier mobility, and transfer-printable. The planar nanowire growth and doping mechanism by MOCVD, as well as the device characteristics of a long channel MESFET and HEMT using such GaAs nanowire as the channel material will be analyzed.
Self-rolled-up tubes on the other hand is a relatively new platform that possesses the potential to provide a wide range of functionalities. It is formed by a combination of top-down and bottom-up approach through the self-rolling of strained thin films. This allows feasible large area assembly and integration with existing semiconductor technology, while maintaining the control of the tube size and heterojunction formation in the tube wall. I will discuss the formation process, large area assembly, and optical characterization of InxGa1-xAs/GaAs micro and nanotubes with active light emitting media incorporated in the tube wall. Device prospects of SNTs for nanophotonics will be explored.
Biography: Xiuling Li received her Ph.D. degree from the University of California at Los Angeles. She joined the faculty of the University of Illinois in 2007, after working at a startup company for six years. She is currently an assistant professor in the Department of Electrical and Computer Engineering. Her current research interests are in the area of nanostructured semiconductor materials and devices. She has won the NSF CAREER award (2008) and DARPA Young Faculty Award (2009). Her groupâs work on the planar nanowires has won one of the best student paper awards at the 2008 IEEE LEOS annual meeting. The micro and nanotube work has been identified as an outstanding symposium paper presented at the 2008 MRS meeting.
Host: P. Daniel Dapkus
Location: John Stauffer Science Lecture Hall (SLH) - 102
Audiences: Everyone Is Invited
Contact: Eliza Aceves
