Ubiquitous Crackling: from Nanocrystal, to Neurons, to Earthquakes, to Stars
Time:Begins at 10:15 AM
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Speaker(s): Professor Karin Dahmen, Department of Physics, University of Illinois
Crackling noise arises when a system responds to changing conditions through discrete, sudden events spanning a broad range of sizes. A wide variety of physical systems exhibiting crackling noise have been studied, from earthquakes to paper crumpling. The regular behavior that appears in crackling across a huge range of sizes allows us to use a trick called “universality” to describe these systems using very simple models. I will describe these ideas using results from a model of crackling noise in plastic deformation of materials, magnets, earthquakes, the brain, and stars.
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