SUNMONTUEWEDTHUFRISAT
Conferences, Lectures, & Seminars
Events for October
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Subspace Techniques for Parallel Magnetic Resonance Imaging
Wed, Oct 08, 2014 @ 03:00 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Derya Dol Gungor, Ohio State University
Talk Title: Subspace Techniques for Parallel Magnetic Resonance Imaging
Series: Medical Imaging Seminar Series
Abstract: Parallel magnetic resonance imaging (pMRI) is an attempt to accelerate data acquisition by simultaneously collecting subsampled k-space data from multiple surface coils. The different sensitivity patterns for the various coils provide a spatial encoding and permit recovery from subsampled or otherwise aliased data. The smooth coil sensitivities in the image domain multiply with the single image representing the spin density of the excited slice. Via the Fourier transform, this can be written as a convolution of k-space representations of the coil sensitivities and the image. Since both the sensitivities and image are unknown in reality, this problem can be formulated as a blind multichannel deconvolution problem in the fully sampled case and this formulation allows us to use the established literature in signal processing to remedy the problems in parallel magnetic resonance imaging.
In this presentation, we particularly focus on subspace techniques to estimate both the coil sensitivities and the calibration kernels of the parallel imaging methods, which are conventionally extracted from a region of fully sampled low-pass calibration data. However, for high acceleration rates, the acquisition of the fully sampled calibration data becomes a limiting factor. Thus, we investigate extraction of coil sensitivities and calibration kernels from subsampled reference or ACS lines. We show that the subspace techniques can also be used for coil combination once the interpolated k-space data are obtained using coil-by-coil reconstruction techniques such as GRAPPA or SPIRiT. We demonstrate that the minimum mean square error (MMSE) criterion provides a non-iterative coil combination method that employs signal space vectors, and provides higher contrast images with less intensity inhomogeneity than well-known coil combination approaches such as square-root sum-of-squares (SoS) and adaptive coil combination. Finally, we show that subspace techniques can also be used in pre-processing to suppress noise by exploiting structure and low-rank property in matrices obtained from fully sampled and uniformly subsampled acquired data in parallel imaging.
Biography: Derya Gol Gungor received her B.S. degree in Electronics Engineering from Ankara University, Turkey in 2007, and Ph.D. degree in Electrical & Computer Engineering from the Ohio State University, USA in 2014. She spent a year in Bilkent University as a graduate research and teaching assistant. In 2013, she worked as a graduate research intern in Siemens Corporate Research, Princeton, NJ. Her general areas of interest are signal & image processing, and Magnetic Resonance Imaging. During her undergraduate, she was awarded with scholarships from Ankara University, Turkish Prime-ministry and Turkish Education Foundation (TEV).
Host: Professor Krishna Nayak
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia White
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Munushian Seminar - Keynote Lecture
Fri, Oct 10, 2014 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: David Wineland, NIST Time and Frequency Division, Boulder, CO
Talk Title: Quantum Computers and Raising Schrödingerâs Cat
Abstract: Quantum systems such as atoms can be used to store information. For example, we can store binary information in two energy levels of an atom by labeling the state with lower energy a â0â and the state with higher energy a â1.â However, quantum systems can also exist in superposition states, thereby storing both states of the bit simultaneously, a situation that makes no sense in our ordinary-day experience. This property of quantum bits or âqubitsâ potentially leads to an exponential increase in memory and processing capacity. It would enable a quantum computer to efficiently solve certain problems such as factorizing large numbers - an ability that could compromise the security of current encryption systems. A quantum computer would also realize an analog of âSchrödingerâs Cat,â a bizarre situation where a cat could be simultaneously dead and alive. Experiments whose goal is to realize a quantum computer based on laser manipulations of atomic ions will be described.
Biography: David J. Wineland (born 1944) is an American physicist at the National Institute of Standards and Technology (NIST) physics laboratory in Boulder. His work has included advances in optics, specifically laser cooling of ions in Paul traps and use of trapped ions to implement quantum computing operations. Wineland received his bachelorâs degree from the University of California, Berkeley in 1965 and his PhD in 1970 working under Norman Ramsey at Harvard University. He then worked as a postdoc in Hans Dehmeltâs group at the University of Washington before joining the National Bureau of Standards in 1975 where he started the ion storage group, now at NIST, Boulder. Wineland is a fellow of the American Physical society, the American Optical society, and was elected to the National Academy of Sciences in 1992. He was the recipient of the 1990 Davisson-Germer Prize in Atomic or Surface Physics, the 1990 William F. Meggers Award of the Optical Society of America, the 1996 Einstein Medal for Laser Science of the Society
of Optical and Quantum electronics, the 1998 Rabi Award from the IEEE Ultrasonics, Ferroelectrics,
and Frequency Control Society, the 2001 Arthur L. Schawlow Prize in Laser. He is an American Nobel-Prize-winning physicist at the National Institute of Standards and Technology (NIST) physics laboratory. His work has included advances in optics, specifically laser cooling of ions in Paul traps and use of trapped ions to implement quantum computing operations. He was awarded the 2012 Nobel Prize in Physics, jointly with Serge Haroche, for âground-breaking experimental methods that enable measuring and manipulation of individual quantum systems.â
Host: EE-Electrophysics
Location: Ethel Percy Andrus Gerontology Center (GER) - 124
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
EE Pioneer Seminar Series
Wed, Oct 15, 2014 @ 01:30 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Melvin A. Breuer, USC
Talk Title: TBA
Abstract: Wednesday, October 15, 2014 - EEB 132
1:30pm Introduction & Welcome
1:35pm Technical talk by Melvin A. Breuer, Charles Lee Powell Professor of EE and CS
2:00pm Melvin A. Breuer in Conversation with Sandeep Gupta
2:45pm Reception - Light Refreshments
Biography: Dr. Breuer is the editor and co-author of Design Automation of Digital Systems: Theory and Techniques, Prentice-Hall; editor of Digital Systems Design Automation: Languages, Simulation and Data Base, Computer Science Press; co-author of Diagnosis and Reliable Design of Digital Systems, Computer Science Press; co-editor of Computer Hardware Description Languages and their Applications, North-Holland; co-editor and contributor to Knowledge Based Systems for Test and Diagnosis, North-Holland; and co-author of Digital System Testing and Testable Design, Computer Science Press 1990 and reprinted in 1995 by the IEEE Press. He has published over 270 technical papers and was formerly the editor-in-chief of the Journal of Design Automation and Fault Tolerant Computing, on the editorial board of the Journal of Electronic Testing, the co-editor of the Journal of Digital Systems, and the Program Chairman of the Fifth International IFIP Conference on Computer Hardware Description Languages and Their Applications. He is a co-author of a paper that received an honorable mention award at the 1997 International Test Conference, a co-author of a paper nominated for the best paper award at the 1998 Design Automation and Test in Europe Conf., a co-author of a paper published in the 1998 International Test Conference that was selected to be in a compendium of significant papers over the last 35 years, and a co-author of the best paper at the 2000 Asian Test Symposium.
Host: Ming Hsieh Institute
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Elise Herrera-Green
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
"Closed-Loop Brain-Machine Interface Architectures"
Mon, Oct 20, 2014 @ 03:00 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Maryam M. Shanechi, Assistant Professor, USC
Talk Title: "Closed-Loop Brain-Machine Interface Architectures"
Series: CommNetS
Abstract: A brain-machine-interface (BMI) is a system that interacts with the brain either to allow the brain to control an external device or to control the brain's state. While these two BMI types are for different applications, from a system-theoretic standpoint, they can both be viewed as closed-loop control systems. Our group develops BMI architectures by working at the interface of systems theory, statistical signal processing and neuroscience. In this talk, I present our work on designing both these BMIs, specifically motor BMIs for restoring movement in paralyzed patients and a BMI for control of the brain state under anesthesia. I also show ongoing work on a completely new BMI for treatment of neuropsychiatric disorders using closed-loop control of electrical stimulation to the brain.
Motor BMIs have largely used standard signal processing techniques. However, devising novel algorithmic solutions that are tailored to the neural system can significantly improve BMI performance. Here, I develop a novel BMI paradigm for movement restoration that incorporates an optimal feedback-control model of the brain and directly processes the spiking activity using point process modeling. I show that this paradigm significantly outperforms the state-of-the-art in closed-loop monkey experiments. Additionally, I construct a new BMI that controls the state of the brain under anesthesia. This is done by designing stochastic controllers that infer the brain's anesthetic state from non-invasive observations of neural activity and control the real-time rate of drug administration to achieve a target brain state. I show the reliable performance of this BMI in rodent experiments. Finally I present ongoing work on BMIs for closed-loop electrical stimulation of the brain to treat neuropsychiatric disorders such as depression.
Biography: Maryam Shanechi is an assistant professor in the Ming Hsieh Department of Electrical Engineering at the University of Southern California (USC). Prior to joining USC, she was an assistant professor in the School of Electrical and Computer Engineering at Cornell University. She received the B.A.Sc. degree in Engineering Science from the University of Toronto in 2004 and the S.M. and Ph.D. degrees in Electrical Engineering and Computer Science from MIT in 2006 and 2011, respectively. She has been named by the MIT Technology Review as one of the worldâs top 35 innovators under the age of 35 for her pioneering work on brain-machine interfaces.
Host: Dr. Ashutosh Nayyar
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Seminar Series
Fri, Oct 24, 2014 @ 03:00 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Goutam Chattopadhyay, JPL
Talk Title: Terahertz Technology and its Applications
Abstract: For more than last forty years, terahertz components and instruments have primarily been developed for space science applications in radio astronomy and planetary sciences. However, in recent years, terahertz waves are increasingly being used in commercial applications such as high speed communications, security imaging, autonomous landing and refueling of airplanes, and medicines. In spite of all these fascinating scientific and commercial potential, the terahertz frequency range (loosely defined as 300 GHz < ν < 10 THz) still remains one of the least utilized electromagnetic bands because of the unavailability of commercial source and sensor components, and sub-systems.
Recent progress in CMOS technology as well as availability of InP HEMT based amplifiers in terahertz frequency band has caught the imagination of researchers for developing terahertz instruments for commercial applications. Rapid progress in multiple fronts, such as commercial software for component and device modeling, low-loss waveguide circuits and interconnect technologies, silicon micromachining for highly integrated and compact packaging, and submicron scale lithographic techniques, is making it an exciting time for terahertz engineers and scientists.
In this presentation, an overview of the state of the terahertz technology will be presented. The talk will detail the science and other applications that specifically require technology at terahertz frequencies. The challenges of the future generation instruments and detectors at these frequencies in addressing the needs for critical scientific and commercial applications will also be discussed.
The research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA, under contract with National Aeronautics and Space Administration.
Biography: Goutam Chattopadhyay (Sâ93-Mâ99-SMâ01-Fâ11) is a Principal Engineer/Scientist at the NASAâs Jet Propulsion Laboratory, California Institute of Technology, and a Visiting Professor at the Division of Physics, Mathematics, and Astronomy at the California Institute of Technology, Pasadena, USA. He received the B.E. degree in electronics and telecommunication engineering from the Bengal Engineering College, Calcutta University, Calcutta, India, in 1987, the M.S. degree in electrical engineering from the University of Virginia, Charlottesville, in 1994, and the Ph.D. degree in electrical engineering from the California Institute of Technology (Caltech), Pasadena, in 1999. From 1987 until 1992, he was a Design Engineer with the Tata Institute of Fundamental Research.
His research interests include microwave, millimeter- and submillimeter- wave heterodyne and direct detector receivers, frequency sources and mixers in the terahertz region, antennas, SIS mixer technology, direct detector bolometer instruments; InP HEMT amplifiers, mixers, and multipliers; high frequency radars, and applications of nanotechnology at terahertz frequencies. He has more than 200 publications in international journals and conferences and holds several patents. Among various awards and honors, he was the recipient of the Best Undergraduate Student Award from the University of Calcutta in 1987, the Jawaharlal Nehru Fellowship Award from the Government of India in 1992, and the IEEE MTT-S Graduate Fellowship Award in 1997. He was the recipient of the best journal paper award in 2013 by IEEE Transactions on Terahertz Science and Technology. He also received more than 30 NASA technical achievement and new technology invention awards. He is a Fellow of IEEE and IEEE.
Hosted by Prof. Hossein Hashemi, Prof. Mike Chen and Prof. Mahta Moghaddam
Organized and hosted by Masashi Yamagata
For questions or additional details, please email myamagat@usc.edu
Host: Hosted by Prof. Hossein Hashemi, Prof. Mike Chen, Prof. Mahta Moghaddam, and Masashi Yamagata
More Info: http://mhi.usc.edu/events/event-details/?event_id=910780
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Elise Herrera-Green
Event Link: http://mhi.usc.edu/events/event-details/?event_id=910780
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Seminar Series
Fri, Oct 24, 2014 @ 03:00 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Goutam Chattopadhyay, JPL
Talk Title: Terahertz Technology and its Applications
Abstract: For more than last forty years, terahertz components and instruments have primarily been developed for space science applications in radio astronomy and planetary sciences. However, in recent years, terahertz waves are increasingly being used in commercial applications such as high speed communications, security imaging, autonomous landing and refueling of airplanes, and medicines. In spite of all these fascinating scientific and commercial potential, the terahertz frequency range still remains one of the least utilized electromagnetic bands because of the unavailability of commercial source and sensor components, and sub-systems.
Recent progress in CMOS technology as well as availability of InP HEMT based amplifiers in terahertz frequency band has caught the imagination of researchers for developing terahertz instruments for commercial applications. Rapid progress in multiple fronts, such as commercial software for component and device modeling, low-loss waveguide circuits and interconnect technologies, silicon micromachining for highly integrated and compact packaging, and submicron scale lithographic techniques, is making it an exciting time for terahertz engineers and scientists.
In this presentation, an overview of the state of the terahertz technology will be presented. The talk will detail the science and other applications that specifically require technology at terahertz frequencies. The challenges of the future generation instruments and detectors at these frequencies in addressing the needs for critical scientific and commercial applications will also be discussed.
The research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA, under contract with National Aeronautics and Space Administration.
Biography: Goutam Chattopadhyay (Sâ93-Mâ99-SMâ01-Fâ11) is a Principal Engineer/Scientist at the NASAâs Jet Propulsion Laboratory, California Institute of Technology, and a Visiting Professor at the Division of Physics, Mathematics, and Astronomy at the California Institute of Technology, Pasadena, USA. He received the B.E. degree in electronics and telecommunication engineering from the Bengal Engineering College, Calcutta University, Calcutta, India, in 1987, the M.S. degree in electrical engineering from the University of Virginia, Charlottesville, in 1994, and the Ph.D. degree in electrical engineering from the California Institute of Technology (Caltech), Pasadena, in 1999. From 1987 until 1992, he was a Design Engineer with the Tata Institute of Fundamental Research.
His research interests include microwave, millimeter- and submillimeter- wave heterodyne and direct detector receivers, frequency sources and mixers in the terahertz region, antennas, SIS mixer technology, direct detector bolometer instruments; InP HEMT amplifiers, mixers, and multipliers; high frequency radars, and applications of nanotechnology at terahertz frequencies. He has more than 200 publications in international journals and conferences and holds several patents. Among various awards and honors, he was the recipient of the Best Undergraduate Student Award from the University of Calcutta in 1987, the Jawaharlal Nehru Fellowship Award from the Government of India in 1992, and the IEEE MTT-S Graduate Fellowship Award in 1997. He was the recipient of the best journal paper award in 2013 by IEEE Transactions on Terahertz Science and Technology. He also received more than 30 NASA technical achievement and new technology invention awards. He is a Fellow of IEEE and IEEE.
Hosted by Prof. Hossein Hashemi, Prof. Mike Chen and Prof. Mahta Moghaddam
Organized and hosted by Masashi Yamagata
For questions or additional details, please email myamagat@usc.edu
Host: Hosted by Prof. Hossein Hashemi, Prof. Mike Chen, Prof. Mahta Moghaddam, and Masashi Yamagata
More Info: http://mhi.usc.edu/events/event-details/?event_id=910780
Location: 132
Audiences: Everyone Is Invited
Contact: Elise Herrera-Green
Event Link: http://mhi.usc.edu/events/event-details/?event_id=910780
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Communications, Networks & Systems (CommNetS) Seminar Series
Wed, Oct 29, 2014 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Lijun Chen, University of Colorado at Boulder
Talk Title: The Weighted Sum Rate Maximization in MIMO Interference Networks: Minimax Lagrangian Duality and Algorithm
Series: CommNetS
Abstract: We take a new approach to the weighted sum-rate maximization in multiple-input multiple-output (MIMO) interference networks, by formulating an equivalent max-min problem. This reformulation has significant implications: the Lagrangian duality of the equivalent max-min problem provides an elegant way to establish the sum-rate duality between an interference network and its reciprocal, and more importantly, suggests a novel iterative minimax algorithm with monotonic convergence for the weighted sum-rate maximization. The design and the convergence proof of the algorithm use only general convex analysis. They apply and extend to other max-min problems with similar structure, and thus provide a general class of algorithms for such optimization problems. This paper presents a promising step and lends hope for establishing a general method based on the minimax Lagrangian duality for developing efficient resource allocation and interference management algorithms for general MIMO interference networks.
Biography: Lijun Chen is an Assistant Professor of Computer Science and Telecommunications at University of Colorado at Boulder. He received a Ph.D. from California Institute of Technology in 2007, and was a Research Scientist in Computing + Mathematical Science at the same institute before joining Colorado. He was a co-recipient of the Best Paper Award at the IEEE International Conference on Mobile Ad-hoc and Sensor Systems in 2007. His current research interests are in communication networks, power networks, parsimonious recovery and low-rank solutions, and optimization, game theory and their engineering application.
Host: Prof. Ashutosh Nayyar
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
