Waves and radiation

Thursday, December 6, 2012 - 4:10pm - 5:00pm
Michael Weinstein (Columbia University)
The discrete nonlinear Schroedinger equation (dNLS) breaks Galilean invariance.
Are there discrete solitary traveling waves of dNLS?
Numerical simulations and formal analyses go back to the work of
M. Peyrard and M.D. Kruskal. A localized state propagating through the lattice
excites radiation modes (lattice phonons). The propagating
structure slows as it radiates some of its energy away. The structure then stops advancing and is eventually pinned
to a fixed lattice site, where it converges to a discrete solitary standing wave.
Wednesday, October 19, 2005 - 10:20am - 11:10am
Jakob Stamnes (University of Bergen)
The talk will be divided in two parts. The first part will be devoted to diffraction tomography based on the scalar wave equation
to obtain images of the refractive-index distribution of an object embedded in a homogeneous medium, with emphasis on experimental
verifications of this technique in applications using light or ultrasound. The second part of the talk will be devoted to imaging
of objects embedded in turbid media, based on radiative transfer theory. Here the emphasis will be on passive optical remote
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