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Events for April 25, 2008
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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
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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
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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
