Select a calendar:
Filter April Events by Event Type:
SUNMONTUEWEDTHUFRISAT
Events for April 23, 2008
-
Assessing Accuracy and Significance of Structural and Functional Brain Images
Wed, Apr 23, 2008 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Dimitrios Pantazis, Postdoctoral Research Associate, Signal and Image Processing InstituteABSTRACT: Recent developments in instrumentation, coupled with new data analysis tools, have led to unique ways of noninvasively exploring the human brain. For example, whole head Magnetoencephalography (MEG) arrays provide dynamic images of human brain function at a millisecond scale; Magnetic Resonance Imaging (MRI) methods allow access to structural and diffusion brain images, as well as functional maps of hemodynamic response. I will discuss ways of identifying experimental effects in dynamic images of MEG brain activation through the use of random field theory and permutation statistical tests. I will then extend these tests to spatial-spectral activation maps, morphological tests of brain structures, and tumor detection in positron emission tomography. Efficient methods to analyze MEG data through the use of custom analysis of covariance models will be presented and applied in a human visual attention study. I will conclude with an evaluation of manual and automatic human cortex registration methods.BIO: Dimitrios Pantazis is Postdoctoral Research Associate in the Department of Electrical Engineering at the University of Southern California, and the Dornsife Cognitive Neuroscience Imaging Center and House Ear Institute in Los Angeles through the Biomedical Imaging Sciences Initiative in USC. He is a member of the Biomedical Imaging Research Lab lead by Prof. Richard M. Leahy, and has broad research interests in modeling and statistical analysis of anatomical and functional brain signals. He received a diploma in EE from the Aristotle University of Thessaloniki - Greece in 1996, and a M.S and Ph.D. in EE from the University of Southern California in 2003 and 2006 respectively. More information on his research can be found at http://neuroimage.usc.edu/pantazisHOST: Richard Leahy, leahy@sipi.usc.edu
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
-
Desensitizing Halfband Interpolation Filters
Wed, Apr 23, 2008 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Professor Alan WillsonElectrical Engineering Department
University of California, Los Angeles, CaliforniaABSTRACTA very common component in digital circuitry for communications systems is the halfband filter. Halfband filters are often used in cooperation with up-samplers and down-samplers when a sampling-rate change is required. While techniques for designing these filters are well known, an entirely new design method has just been discovered wherein these filters can be made to possess a significant desensitivity to the filter's tap coefficient values. Such desensitivity can be exploited to yield halfband filters with reduced hardware requirements, which leads to circuits having lower power consumption, higher operating speeds, and smaller IC area. This talk will give a brief introduction to the concept of halfband filters and the applications of halfband filters. It will then explain the rationale and the method for the desensitizing of the filters and, finally, will illustrate through design examples and further explanation how the desensitivity improves upon the conventional designs.BIOGRAPHYDr. Alan N. Willson, Jr. is a Distinguished Professor of Electrical Engineering at UCLA. He served as Assistant Dean for Graduate Studies in the UCLA School of Engineering and Applied Science from 1977 through 1981, and served as Associate Dean of Engineering from 1987 through 2001. He has been engaged in research concerning computer-aided circuit analysis and design, the stability of distributed circuits, properties of nonlinear networks, theory of active circuits, digital signal processing, analog circuit fault diagnosis, and integrated circuits for signal processing. He is editor of Nonlinear Networks: Theory and Analysis (New York: IEEE Press, 1974). In 1991, he founded Pentomics, Inc. Dr. Willson served as editor of the IEEE Transactions on Circuits and Systems from 1977 to 1979 and as President of the IEEE Circuits and Systems (CAS) Society in 1984. He was the recipient of the 1978 and 1994 Guillemin-Cauer Awards of the IEEE CAS Society, the 1982 George Westinghouse Award of the American Society for Engineering Education, the 1982 Distinguished Faculty Award of the UCLA Engineering Alumni Association, the 1984 Myril B. Reed Best Paper Award of the Midwest Symposium on CAS, the 1985 and 1994 W. R. G. Baker Awards of the IEEE, the 2000 Technical Achievement Award and the 2003 Mac Van Valkenburg Award of the IEEE CAS Society. In 2007 he and his recent Ph.D. student, Guichang Zhong, were winners of the 44th DAC/ISSCC Student Design Contest.HOST: Professor Sanjit K. Mitra
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
