SUNMONTUEWEDTHUFRISAT
Events for March 25, 2013
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Compression and Modern Data Processing
Mon, Mar 25, 2013 @ 10:30 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Thomas Courtade, Stanford University
Talk Title: Compression and Modern Data Processing
Abstract: At first glance, modern applications of data processing -- such as clustering, querying, and search -- bear little resemblance to the classical Shannon-theoretic problem of lossy compression. However, the ultimate goal is the same for modern and classical settings; both demand algorithms which strike a balance between the complexity of the algorithm output and the utility that it provides. Thus, when we attempt to establish fundamental performance limits for these "modern" data processing problems, elements of classical rate distortion theory naturally emerge.
Inspired by the challenges associated with extracting useful information from large datasets, I will discuss compression under logarithmic loss. Logarithmic loss is a penalty function which measures the quality of beliefs a user can generate about the original data upon observing the compressor's output. In this context, we characterize the tradeoff between the degree to which data can be compressed and the quality of beliefs an end user can produce. Notably, our results for compression under logarithmic loss extend to distributed systems and yield solutions to two canonical problems in multiterminal source coding.
I will also briefly discuss recent work on compression for identification, where we seek to compress data in a manner that preserves the ability to reliably answer queries of a certain form. This setting stands in stark contrast to the traditional compression paradigm, where the goal is to reproduce the original data (either exactly or approximately) from its compressed form. Under certain assumptions on the data sources, we characterize the tradeoff between compression rate and the reliability at which queries can be answered.
Biography: Thomas Courtade received the B.S. degree in Electrical Engineering from Michigan Technological University in 2007, and the M.S. and Ph.D. degrees in Electrical Engineering from UCLA in 2008 and 2012, respectively. In 2012, he was awarded the Inaugural Postdoctoral Research Fellowship through the Center for Science of Information. He currently holds this position, and resides at Stanford University. His recent honors include a Distinguished Ph.D. Dissertation award and an Excellence in Teaching award from the UCLA Department of Electrical Engineering and a Best Student Paper Award at the 2012 International Symposium on Information Theory.
Host: Giuseppe Caire, x04683, caire@usc.edu
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
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EE-EP Seminar
Mon, Mar 25, 2013 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Mina Rais-Zadeh, University of Michigan
Talk Title: Resonant MEMS for Timing and Integrated Sensing
Abstract: Invention of transistors and development of microelectronics unleashed a revolution in computing and communication. This revolution was mostly brought about by the fact that transistors and ICs could be miniaturized at an unprecedented level. Following the same trend, micro-electromechanical systems (MEMS), have been extensively employed for sensing and in mobile applications. In the next few decades, the MEMS field is expected to grow even more rapidly and find wider applications. A vast majority of systems used for sensing, communications, and signal processing rely on accurate clocking signals that are generated by micro-resonators. In this talk, I will go over the design of micro-resonators and resonant sensors, and discuss the application of these devices in timing and integrated sensing. I will explain the need for high quality factor and discuss the physical phenomena that limit the performance and scaling of resonant MEMS.
Biography: Professor Mina Rais-Zadeh received the B.S. degree in electrical engineering from Sharif University of Technology and M.S. and Ph.D. degrees both in Electrical and Computer Engineering from Georgia Institute of Technology in 2005 and 2008, respectively. From August 2008 to 2009, she was a Postdoctoral Research Fellow with the Integrated MEMS Group, Georgia Institute of Technology. Since January 2009, she has been with the University of Michigan, Ann Arbor, where she is currently an Assistant Professor in the Department of Electrical Engineering and Computer Science. Mina is the recipient of the NSF CAREER Award (2011), IEEE Electron Device Society Early Career Award (2011), NASA Early Career Faculty Award (2012), and the Crosby Research Award from the University of Michigan (2013). She was the finalist in student paper competitions at the SiRF (2007) and IMS (2011) conferences. She is the chairperson of the Display, Sensors and MEMS (DSM) sub-committee at the 2013 IEEE International Electron Devices Meeting (IEDM) and a senior member of IEEE. She has served as a member of the technical program committee of IEEE IEDM, IEEE Sensors Conference, and the Hilton Head workshop. Her research interests include RF MEMS, passive micromachined devices for communication applications, resonant micromechanical devices, gallium nitride MEMS, and micro/nano fabrication process development.
Host: EE-Electrophysics
Location: Ronald Tutor Hall of Engineering (RTH) - 324
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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Speech and Multimedia Research at ICSI
Mon, Mar 25, 2013 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Roberto Pieraccini, CEO and Director, ICSI
Talk Title: Speech and Multimedia Research at ICSI
Abstract: ICSI, the International Computer Science Institute, is an independent organization affiliated with the University of California at Berkeley. Its mission is that of pursuing advanced computer science research through international collaboration. The Institute is involved in research in many areas, including Networking and Security, Computer Vision, Speech, Audio and Multimedia, Artificial Intelligence, and Computational Biology. In this talk I will give a general overview of the research carried out in the different fields, with particular attention to the areas of speech, audio, and multimedia. Speech research at ICSI is focused on trying to address the limitation of the current speech recognition systems both in terms of modeling and needs for data. Audio and multimedia research is mostly involved in different video retrieval tasks and has shown that interesting results can be achieved by applying a mix of techniques typically used in tasks such as speaker verification and diarization.
Biography: Roberto Pieraccini is the CEO and Director of the International Computer Science Institute (ICSI) in Berkeley, CA. Prior to that he was the Chief Technology Officer of SpeechCycle, a company specializing in advanced spoken human-machine interaction. He was also a research manager at IBM T.J. Watson Research and SpeechWorks International, and a member of the technical staff at Bell Labs and AT&T Shannon Laboratories. He started his career in the 1980s as a researcher at CSELT, the research laboratories of the Italian telephone company. His is the author and co-author of more than 130 publications in the fields of speech recognition, spoken language understanding and dialog, multimodal interaction, and machine learning. His book ââ¬ÅThe Voice in the Machineââ¬Â published by MIT Press in 2012, traces the history of speech recognition and understanding technology during the past 60 years.
Host: Prof. Shrikanth Narayanan
Location: Ronald Tutor Hall of Engineering (RTH) - 320
Audiences: Everyone Is Invited
Contact: Mary Francis
