19 T.W. Alexander Drive
P.O. Box 14006
Research Triangle Park, NC 27709-4006
Tel: 919.685.9350
Fax: 919.685.9360
[email protected]

2007-08 Program on Random Media

Waves and Imaging Workshop

January 31-February 1, 2008

General Information
Application
Schedule

General Information

The Waves and Imaging Workshop for the SAMSI program on Random Media will be held on Thursday and Friday, January 31-February 1, 2008, at the Radisson Hotel RTP in Research Triangle Park, NC.

Several novel solutions have been recently proposed to address challenging problems of imaging and inversion from wave measurements, most notably in geophysics and optics. A first example is time reversal, where flipped waveforms sent back into a random medium refocus an order of magnitude better than they would in a uniform medium. A second example is cross-correlation of seismic noise, a procedure that produces the entire Greens function of surface waves from passive receivers. A third example is compressive reverse-time migration where ideas from compressive sampling bring the computational complexity of migration down to the information level of seismic wavefields. The explanation and prediction of all these phenomena stem from some surprising results of statistical stability and probability concentration, which are currently being investigated by several groups.

Primary objectives of this workshop are to 1) review the extent to which these imaging methods have been developed and understood, 2) disseminate progress made in the working group, and 3) discuss open problems and future directions.

Workshop Program Committee: Laurent Demanet (Stanford University), Maarten de Hoop (Purdue University), Kazi Ito (North Carolina State University), Ralph Smith (North Carolina State University, SAMSI Directorate Liaison), Hongkai Zhao (University of California-Irvine)

Speakers and Invited Discussants:

Gang Bao (Michigan State University)
Liliana Borcea (Rice Univerity)
Henri Calandra (Total)
Yu Chen (New York University)
Margaret Cheney (Rensselaer Polytechnic Institute)
Josselin Garnier (L'Universite Paris VII)
Lenya Ryzhik (University of Chicago)
John Schotland (University of Pennsylvania)
Knut Solna (University of California, Irvine)
Bill Symes (Rice University)
Luis Tenorio (Colorado School of Mines)
Richard Weaver (University of Illinois, Urbana-Champaign)

Application

On-line registrations are now closed. However, on-site registrants are still welcome. Please call SAMSI at (919)685-9350

Schedule

Thursday, January 31, 2008
Radisson Hotel RTP

	Imaging and Inverse Problems Session
8:00-9:00 a.m.	Registration and Contintental Breakfast
9:00-9:50	Margaret Cheney, Rensselaer Polytechnic Institute Waveform Design for Radar Detection and Imaging
9:50-10:20	Break
10:20-10:55	Gang Bao, Michigan State University Mathematical & Computational Challenges in Inverse Medium Scattering
10:55-11:30	Yu Chen, New York University Gaussian Quadratures and Signal Processing
11:30-12:00	Discussion Session
12:00-1:00	Lunch
	Cross-Correlations, Probability and Statistical Methods
1:00-1:50	Richard Weaver, University of Illinois at Urbana-Champaign Perspectives on retrieval of Green's Function from correlations of noise
1:50-2:20	Break
2:20-2:55	Luis Tenorio, Colorado School of Mines Least Squares
2:55-3:30	Lenya Ryzhik, University of Chicago Waves and transport: agreement and disagreement
3:30-5:00	Discussion Session

Friday, February 1, 2008
Radisson Hotel RTP

	Time Reversal and Imaging
8:00-9:00	Registration and Continental Breakfast
9:00-9:50	Josselin Garnier, Universite de Paris VI Wave propagation and time reversal in random media
9:50-10:20	Break
10:20-10:55	Knut Solna, University of California-Irvine Coherent Interferometric Imaging for Synthetic Aperture Radar in the Presence of Noise
10:55-11:30	Liliana Borcea, Rice University Layer annihilator for imaging and velocity estimation in finely layered media
11:30-12:00	Discussion Session
12:00-1:00	Lunch
	Imaging, Inverse Problems and Cross-Correlations
1:00-1:50	William Symes, Rice University Deterministic Imaging in a Random World
1:50-2:20	Break
2:20-2:55	Henri Calandra, Total Improving the depth imaging with optimised One Way Wave Equation Propagators
2:55-3:30	John Schotland, University of Pennsylvania Image Reconstruction in Optical Tomography

Local Information (Hotels, etc.)

Random Media Program Page