Campuses:

Pattern formation

Thursday, January 18, 2018 - 11:30am - 12:20pm
Maxim Lavrentovich (University of Tennessee)
Plant pollen are cells which exhibit a plethora of surface patterns, including stripes, hexagons, foam-like ridges, and arrangements of spikes. The spherical shape of the cells ensures that these various patterns have defects. We study the development of these patterns and conjecture that the diversity of the observed patterns, and their reproducibility within a single species, may be explained by a first-order phase transition from an unpatterned to a patterned state.
Wednesday, February 12, 2014 - 3:15pm - 4:05pm
Miroslav Kramar (Rutgers, The State University Of New Jersey )
Persistence diagrams are a relatively new topological tool for describing and quantifying complicated patterns in a simple but meaningful way. We will demonstrate this technique on patterns appearing in Rayleigh-Benard convection dense granular media. This procedure allows us to transform experimental or numerical data from experiment or simulation into a point cloud in the space of persistence diagrams. There are a variety of metrics that can be imposed on the space of persistence diagrams.
Wednesday, May 18, 2011 - 3:00pm - 3:30pm
Ronald Siegel (University of Minnesota, Twin Cities)
A biochemomechanical oscillator has been developed in which a clamped, pH-sensitive hydrogel membrane containing N-isopropylacrylamide (NIPAAm) and methacrylic acid (MAA) separates a chamber containing glucose oxidase from a pH controlled external medium containing a constant concentration of glucose.
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