[Amath-seminars] REMINDER: Boeing Seminar - Thursday Feb. 4 - George Papanicolaou

Andrea Barreiro akb6 at washington.edu
Thu Feb 4 15:44:37 PST 2010

Hello everyone,

Just a reminder G. Papanicolaou will be speaking in about 10 minutes,
in 134 Sieg Hall (see forwarded message for details).


Begin forwarded message:

> From: Eli Shlizerman <shlizee at uw.edu>

> Date: January 31, 2010 10:17:17 PM PST

> To: amath-current at amath.washington.edu, amath-

> seminars at u.washington.edu

> Subject: Boeing Seminar - Thursday Feb. 4 - George Papanicolaou


> Dear All,


> The second Boeing Distinguished Lecture of the winter quarter will

> take place this Thursday, Feb. 4, at 4:00 pm at Sieg Hall 134.

> Notice the change in the location.


> Please join us for a reception afterwards on the 4th floor of

> Guggenheim.


> -------------------------------------------------------------------------------------------------------

> Boeing Distinguished Lecture Series



> "Imaging with noise"


> George Papanicolaou,

> Mathematics Department,

> Stanford University


> Time & Location:

> Thursday, Feb. 4, at 4:00 pm at Sieg Hall 134


> Abstract:

> It is somewhat surprising at first that it is possible to locate a

> network

> of sensors from cross correlations of noise signals that they

> record. This

> is assuming that the speed of propagation in the ambient environment

> is known and that the noise sources are sufficiently diverse. If the

> sensor locations are known and the propagation speed is not known

> then it can be estimated from cross correlation information. Although

> a basic understanding of these possibilities had been available for

> some

> time, it is the success of recent applications in seismology that have

> revealed the great potential of correlation methods, passive sensors

> and

> the constructive use of ambient noise in imaging. I will introduce

> these

> ideas in an interdisciplinary, mathematical way and show that a great

> deal can be done with them. Things become more complicated, and

> a mathematically more interesting, when the ambient medium is also

> strongly scattering. I will end with a review of what is known so far

> in this case, and what might be expected.


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