March 06, 2013
Noyce Conference Room
Veit Elser (Cornell University)
Abstract. SFI is my spring break destination from the frozen northland where I occasionally teach the introductory physics course about waves. A standard part of the curriculum deals with computing a diffraction pattern, given a pair of slits of a given size and separation — but not the reverse, i.e. directly computing the structure of the slits from the diffraction pattern. This colloquium begins with a tutorial on solving the reverse problem and puts this in the context of current efforts to image molecules with free-electron x-ray lasers. The principle of the algorithm that solves the x-ray "phase problem," as it is usually called, is remarkably general and has proven to be a powerful strategy for solving a broad range of constraint problems. A sampling of these, from proteins to packings, are described at the end of the talk.
Purpose: Research Collaboration
SFI Host: Cris Moore
During an SFI Community Lecture March 11 in Santa Fe, MIT's Alex Pentland described ways the mathematical analysis of social networks is fertile ground for understanding human behavior. Watch ...
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