Select a calendar:
Filter April Events by Event Type:
SUNMONTUEWEDTHUFRISAT
Events for April 25, 2008
-
Meet USC
Fri, Apr 25, 2008
Viterbi School of Engineering Undergraduate Admission
Workshops & Infosessions
This half day program is designed for prospective freshmen and family members. Meet USC includes an information session on the University and the Admission process; a student led walking tour of campus and a meeting with us in the Viterbi School. Meet USC is designed to answer all of your questions about USC, the application process and financial aid.This program occurs twice, once at 9:00 a.m. and again at 12:00 p.m. Reservations are required for Meet USC. Please visit http://www.usc.edu/admission/undergraduate/visit/events/meet_usc/ to check availability and make an appointment. Be sure to list an Engineering major as your "intended major" on the webform!
Location: USC Admission Center
Audiences: Prospective Freshmen and Family Members - RESERVATIONS REQUIRED
Contact: Viterbi Admission
-
Studying Brain Dyanmics in Large-Scale Cortical Networks with MEG Imaging and Human Intracerebral...
Fri, Apr 25, 2008 @ 02:00 AM - 03:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Karim JerbiNeurophysiology of Action and Perception Collège de France CNRS,Paris, France
&
Brain Dynamics and Cognition Lab, INSERM,
Lyon, France Abstract:Increasing evidence from human and non-human primate studies suggests that long-range cerebro-cerebral synchronization might reflect ongoing communication between distant neural populations essential for integrative behaviour. In the first part of this talk I will present the results of an MEG study in which we investigated the task-specific modulation of cerebral oscillations and long-distance cortico-cortical coupling in multiple frequency bands during a sustained visuomotor task. Our results show modulations of oscillatory power in various frequency bands in multiple areas including an increase in high gamma power (60-90 Hz) in motor and premotor areas during visuomotor control. Coherence analysis provides evidence for task-specific increases in low-frequency coherence between the primary motor cortex and multiple cortical and subcortical brain areas forming large-scale functional networks including the fronto-parietal circuit and the cerebello-thalamo-cortical pathway. In the second part of the talk I will provide an overview of some of the ongoing studies performed with intracerebral recordings in humans performing various cognitive tasks. Both online and offline analysis will be presented. The invasive experiments with real-time visual feedback of task-related brain power modulations (/Brain TV/ set-up) are discussed in the context of invasive brain-computer interfaces, neurofeedback as well as its utility basic neuroscience research.Host: Professor Richard LeahyLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
-
Model, Identification & Analysis of Complex Stochastic Systems:
Fri, Apr 25, 2008 @ 11:00 AM - 01:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Sonjoy Das- PhD DefenseThe work presented in this dissertation focuses on characterization, identi¯-cation and analysis of stochastic systems. Stochastic systems refer to a physical
phenomena with inherent uncertainty in it, and are generally characterized by
two forms of representation: (1) a governing conservation law or partial dif-ferential equation (PDE) with some of its parameters interpreted as random
processes, and (2) a model-free random matrix operator. In this work, three
data-driven approaches are ¯rst introduced to characterize and construct consis-tent probability models of non-stationary and non-Gaussian random processes
or ¯elds within the polynomial chaos (PC) formalism. The resulting PC rep-resentations would be useful to probabilistically characterize the system input-output relationship for a variety of applications. Second, a novel hybrid physics-and data-based approach is proposed to characterize a complex stochastic sys-tems by using random matrix theory. Application of this approach to multiscale
mechanics problems is also presented. Also discussed in this work is a simple,
computationally e±cient and experiment-friendly coupling scheme based on fre-quency response function. This coupling scheme would be useful for analysis of
a complex stochastic system consisting of several subsystems characterized by,
e.g., stochastic PDEs or/and model-free random matrix operators.Location: Kaprielian Hall (KAP) - 209
Audiences: Everyone Is Invited
Contact: Evangeline Reyes
-
Role of ammonia and water vapor on the formation of secondary organic aerosols in alkene/ozone react
Fri, Apr 25, 2008 @ 01:00 PM - 02:00 PM
Sonny Astani Department of Civil and Environmental Engineering
Conferences, Lectures, & Seminars
Dr. Kwangsam NaBourns College of Engineering¡XCenter for Environmental Research and Technology (CE-CERT), University of California, RiversideAbstractThis study deals with the influence of ammonia (NH3) on secondary organic aerosol (SOA) formation from the ƒÑ-pinene/ozone systems in the dry and humid conditions. The effect of different OH scavengers on SOA formation is briefly described. The aerosol yield differed depending on which OH scavenger was used. Yield was the highest using CO, followed by cyclohexane and 2-butanol. It was found that the number and volume concentrations were quickly increased by 15% and 8%, respectively when NH3 was added after the reaction ceased. An increase in number concentration indicates the formation of new particles resulting from gas-to-particle conversion. Moreover, average size of particles increased from 242 nm to 248 nm. The resulting particles may be ammonium salts formed by the reaction between organic acids and NH3. When NH3 was added to an aerosolized cis-pinonic acid in the chamber reactor, a dramatic increase in both number and volume concentrations of cis-pinonic acid was observed. This is evidence that NH3 drives gas-phase organic acids into condensable salts, leading to elevated SOA formation. Initially present NH3 significantly enhanced aerosol yield in ƒÑ-pinene-ozone reactions, regardless of the presence of water vapor. However, the enhancing effect of NH3 on SOA formation was found to diminish in humid conditions. The degree of the increase in SOA yield in the presence of NH3 was higher in the humid condition than in the dry condition. The role of NH3 on SOA formation in the dry and humid conditions was further explained and discussed in terms of a theoretical modeling study.
Location: Kaprielian Hall (KAP) - 209
Audiences: Everyone Is Invited
Contact: Evangeline Reyes
-
Point Process Models and Their Applications in Wireless Ad Hoc and Sensor Networks
Fri, Apr 25, 2008 @ 01:00 PM - 02:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Workshops & Infosessions
Dr. Martin Haenggi
University of Notre DameAbstract:
The node distribution in ad hoc and sensor networks is typically modeled as a stochastic point process. Due to its analytical tractability, the (homogeneous) Poisson point process (PPP) is widely popular. We give an overview of interference and outage results for the PPP, and we present an approach to extend these to more general point processes. Next we show how fading can be incorporated in the point process, which leads to a geometric interpretation of fading that permits a convenient characterization of single-hop connectivity and transport capacity. We also present a recent result for the sentry selection problem in sensor networks, where the goal is to partition a PPP into subsets that each cover the plane.Bio:
Martin Haenggi is an Associate Professor of Electrical Engineering at the University of Notre Dame. He received the Dipl. Ing. (M.Sc.) and Ph.D. degrees from the Swiss Federal Institute of Technology in Zurich (ETHZ) in 1995 and 1999, respectively. In 1999/2000, he spent a postdoctoral year at the University of California in Berkeley. He received an NSF CAREER award in 2005, and he is a member of the Editorial Board of the Elsevier Journal of Ad Hoc Networks and the lead guest editor of an upcoming JSAC issue on stochastic geometry and random graphs for wireless networks. His scientific interests include networking and wireless communications, with an emphasis on ad hoc and sensor networks. He is currently on leave at UCSD.Host: Prof. Bhaskar Krishnamachari, Ext. 12528 http://engineering.usc.edu/calendar/
Location: Hedco Neurosciences Building (HNB) - 107
Audiences: Everyone Is Invited
Contact: B.Krishnamachari
