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SUNMONTUEWEDTHUFRISAT
Events for February 11, 2005
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New Approaches to Control Biofilm Formation and Chronic infection of Medical Devices
Fri, Feb 11, 2005 @ 02:30 PM - 04:00 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Presented by:Professor Bill Costerton, DirectorCenter for Biofilms,
School of Dentistry,
University of Southern CaliforniaAbstract :One of the most important limitations in the design and use of medical
devices derives from our failure to find biomaterials that resist the
tendency of bacteria to form biofilms on inert surfaces. These biofilms
are
inherently resistant to host defenses and to antibiotics, and they cause
chronic infections that often necessitate the removal of the device
concerned. Now that we appreciate the nature of device-related
infections,
we can combine new anti-biofilm strategies with standard anti-bacterial
strategies, and achieve some measure of control of the infections that
virtually preclude the use of some of the most sophisticated medical
devices.Refreshments served at 2:30All first year MASC students are required to attend
Location: Vivian Hall of Engineering (VHE) - 217
Audiences: Everyone Is Invited
Contact: Petra Pearce
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Continuous-Time Digital Filters and Other Mixed-Domain Processors\N
Fri, Feb 11, 2005 @ 03:00 PM
USC Viterbi School of Engineering
Conferences, Lectures, & Seminars
The main part of this talk by Yannis Tsividis of Columbi University considers the mixing of two domains usually kept
separate: the digital domain, and the continuous time domain. When a
continuous-time analog signal is to be processed using conventional DSPs, it
is first sampled and quantized. This introduces aliasing of both the signal
and the quantization distortion. He proposes to quantize, but not sample, the
input signal, producing continuous-time binary signals which are processed
directly using continuous-time digital hardware. This eliminates aliasing and
results in much smaller in-band quantization error than is possible with
conventional digital techniques. Preliminary experimental and simulation
results support these claims. He then introduces other mixed-domain signal
processors, including linear analog filters which use nonlinear signal
decompositions and processors in which digital waveforms are processed
directly with analog circuits. The emphasis of the talk is on principles, some
of which may lead to practically important results whereas others may be
interesting only from a conceptual viewpoint.Yannis Tsividis received the B.S. degree from the University of Minnesota,
Minneapolis in 1972, and the M.S. and Ph.D. degrees from the University of
California, Berkeley, in 1973 and 1976, respectively. Since 1976 he has been
with the Department of Electrical Engineering, Columbia University, New York,
where he currently holds the Charles Batchelor Memorial Chair. He has done
extensive work in analog and mixed-signal MOS integrated circuits at the
device, circuit, system, and computer simulation level, starting with the
first fully-integrated MOS operational amplifier in 1975. A Fellow of the
IEEE, Dr. Tsividis has received or co-received several research awards,
including the 1984 Baker Prize Award for the best IEEE publication, the IEEE
Circuits and Systems Society's Darlington (1987) and Guilllemin-Cauer (1998)
Best Paper Awards, and the 2003 International Solid-State Circuits Conference
L. Winner Outstanding Paper Award. He received Columbia's Presidential Award
for Outstanding Teaching in 2003 and the IEEE Undergraduate Teaching Award in
2005.
Â
Host:Â Prof. John ChomaLocation: Ethel Percy Andrus Gerontology Center (GER) - ontology Auditorium.
Audiences: Everyone Is Invited
Contact: Eric Mankin
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DISTINGUISHED LECTURER SERIES
Fri, Feb 11, 2005 @ 03:00 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
"CONTINUOUS-TIME DIGITAL FILTERS AND OTHER MIXED-DOMAIN PROCESSORS"PROF. YANNIS TSIVIDISColumbia UniversityGerontology Auditorium (GER 124)Friday, February 11, 20053:00-4:00p.m.Abstract:---------The main part of this talk considers the mixing of two domains usually kept separate: the digital domain, and the continuous time domain. When a continuous-time analog signal is to be processed using conventional DSPs, it is first sampled and quantized. This introduces aliasing of both the signal and the quantization distortion. We propose to quantize, but not sample, the input signal, producing continuous-time binary signals which are processed directly using continuous-time digital hardware. This eliminates aliasing and results in much smaller in-band quantization error than is possible with conventional digital techniques. Preliminary experimental and simulation results support these claims. We then introduce other mixed-domain signal processors, including linear analog filters which use nonlinear signal decompositions and processors in which digital waveforms are processed directly with analog circuits. The emphasis of the talk is on principles, some of which may lead to practically important results whereas others may be interesting only from a conceptual viewpoint.Bio:-----Yannis Tsividis received the B.S. degree from the University of Minnesota, Minneapolis in 1972, and the M.S. and Ph.D. degrees from the University of California, Berkeley, in 1973 and 1976, respectively. Since 1976 he has been with the Department of Electrical Engineering, Columbia University, New York, where he currently holds the Charles Batchelor Memorial Chair. He has done extensive work in analog and mixed-signal MOS integrated circuits at the device, circuit, system, and computer simulation level, starting with the first fully-integrated MOS operational amplifier in 1975. A Fellow of the IEEE, Dr. Tsividis has received or co-received several research awards, including the 1984 Baker Prize Award for the best IEEE publication, the IEEE Circuits and Systems Society's Darlington (1987) and Guilllemin-Cauer (1998) Best Paper Awards, and the 2003 International Solid-State Circuits Conference L. Winner Outstanding Paper Award. He received Columbia's Presidential Award for Outstanding Teaching in 2003 and the IEEE Undergraduate Teaching Award in 2005.Host: Prof. John Choma, x04692 ***A reception will follow the seminar at 4:00p.m.
Location: Ethel Percy Andrus Gerontology Center (GER) - ontology Auditorium
Audiences: Everyone Is Invited
Contact: Rosine Sarafian
