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Events for April 13, 2015
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Seminar in Biomedical Engineering
Mon, Apr 13, 2015 @ 12:30 PM - 01:50 PM
Alfred E. Mann Department of Biomedical Engineering
Conferences, Lectures, & Seminars
Speaker: Brian Ziyue Wu, Grodins Graduate Award & Coulter Award Winner (BME PhD Candidate), BME PhD Candidate, member of the Magnetic Resonance Engineering Lab at USC
Talk Title: "Seeing Sleep: Real-time MRI Methods for the Evaluation of Sleep Apnea"
Abstract: Obstructive sleep apnea (OSA) is a largely neglected disease which can lead to serous consequences. It is characterized by repetitive upper airway (UA) collapse during sleep. Current gold standard of diagnosing sleep apnea is an overnight polysomnography, from which an apnea-hypopnea index (AHI) is derived to indicate the severity of apnea. However, lack of direct anatomical information often limits the value of such sleep studies. UA compliance, (ratio of UA cross-sectional area and pressure), has been proposed to measure airway collapsibility and requires an imaging tool. MRI is a noninvasive technique to measure the cross-sectional area and has many advantages compared to other imaging modalities. But it is fundamentally limited by acquisition speed. Here we present a novel real-time method, which synergistically combines several acceleration techniques including parallel imaging, radial trajectory, compressed sensing and multiband acquisition. We are able to simultaneously acquire four axial airway sites with 90 ms and 1mm resolution, a 33-fold acceleration compared to conventional MRI. Our results show for the first time that a narrower airway site is not always easier to collapse. These findings have the potential to impact future OSA surgical planning.
Host: Stanley Yamashiro
Location: OHE 122
Audiences: Everyone Is Invited
Contact: Mischalgrace Diasanta
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Around the Reproducibility of Scientific Research: A Knockoff Filter for Controlling the False Discovery Rate
Mon, Apr 13, 2015 @ 03:30 PM - 05:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Emmanual Candes, Stanford University
Talk Title: Around the Reproducibility of Scientific Research: A Knockoff Filter for Controlling the False Discovery Rate
Abstract: The big data era has created a new scientific paradigm: collect data first, ask questions later. When the universe of scientific hypotheses that are being examined simultaneously is not taken account, inferences are likely to be false. The consequence is that follow up studies are likely not to be able to reproduce earlier reported findings or discoveries. This reproducibility failure bears a substantial cost and this talk is about new statistical tools to address this issue. Imagine that we observe a response variable together with a large number of potential explanatory variables, and would like to be able to discover which variables are truly associated with the response. At the same time, we need to know that the false discovery rate (FDR)---the expected fraction of false discoveries among all discoveries---is not too high, in order to assure the scientist that most of the discoveries are indeed true and replicable. We introduce the knockoff filter, a new variable selection procedure controlling the FDR in the statistical linear model whenever there are at least as many observations as variables. This method achieves exact FDR control in finite sample settings no matter the design or covariates, the number of variables in the model, and the amplitudes of the unknown regression coefficients, and does not require any knowledge of the noise level. This work is joint with Rina Foygel Barber.
Biography: His research interests are in computational harmonic analysis, statistics, information theory, signal processing and mathematical optimization. In 2001 Candès received an Alfred P. Sloan Research Fellowship. He was awarded the Wilkinson Prize in Numerical Analysis and Scientific Computing in 2005. In 2006, he received the Popov Prize as well as the National Science Foundation's highest honor: the Alan T. Waterman Award for research described by the NSF as "nothing short of revolutionary". In 2010 Candès and Terence Tao were awarded the Pólya Prize. In 2011, Candès was awarded the ICIAM Collatz Prize. Candès has also received the Lagrange Prize in Continuous Optimization. He was presented with the Heineman Prize by the Academy of Sciences at Göttingen in 2013. In 2014 he was elected to the National Academy of Sciences. In 2015 he received the AMS / SIAM Birkhoff Prize.
Host: Susan Friedlander
Location: Ethel Percy Andrus Gerontology Center (GER) - Auditorium
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
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Izmir Graduate Information Session
Mon, Apr 13, 2015 @ 06:00 PM - 08:00 PM
Viterbi School of Engineering Graduate Admission
Workshops & Infosessions
Students who have earned or are in the process of earning a Bachelor's degree in engineering, math, or a hard science (such as physics, biology, or chemistry) are welcome to attend to learn more about applying to our graduate programs.
The session will include information on the following topics:
Master's & Ph.D. programs in engineering
How to Apply
Scholarships and funding
Student life at USC and in Los Angeles
There will also be sufficient time for questions. Refreshments will be provided.
Please contact us at viterbi.gradprograms@usc.edu if you have any inquiries about the event.
In order to guarantee seating availability, we request completion of the online registration form using the Eventbrite links on the event pageAudiences: Students with an undergraduate background in engineering, math or science
Contact: William Schwerin
