Seminars of the Focus Area Complex Systems

Prof. Dr. C. Beta, Prof. Dr. K. Dethloff, Prof. Dr. R. Engbert, Prof. Dr. M. Holschneider, Prof. Dr. W. Huisinga, Prof. Dr. Ralf Metzler, Prof. Dr. A. Pikovsky, Prof. Dr. S. Reich, Prof. Dr. M. Rosenblum, Prof. Dr. G. Rüdiger, Prof. Dr. T. Scheffer, Prof. Dr. F. Scherbaum, Prof. Dr. J. Selbig, Prof. Dr. F. Spahn

Seminar

Speaker: Oliver Steinbock, Tallahassee, FL, USA

Title: Wave Patterns in Three-dimensional Excitable Media * Colloquium on Complex and Biological Systems

Time: Fri, Dec 7, 2012, 10:15am

Place: bldg 28, room 0.108

Abstract:
Three-dimensional active media can selforganize rotating concentration patterns. These vortex-like scroll waves exist in chemical reactions, aggregating slime mold colonies, and cardiac tissue. In the human heart they cause arrhythmias such tachycardia and ventricular fibrillation. We use the Belousov-Zhabotinsky reaction to study the dynamics of these intriguing dissipative structures. Our more recent research focuses on the pinning of scroll waves. In my talk I will present a short introduction to excitable media and rotating concentration waves, describe wave detection by optical tomography, and discuss recent research results. The latter include topological constraints in vortex pinning, the description of twist dynamics by nonlinear diffusion equations, and the analysis of short-range interaction of scroll wave filaments.

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Past NLD Seminars (1994-2007) & (2008 ...)

Students' seminar: Theoretical Physics, PIK, Modeling & TSA Berlin-Potsdam-Colloquia: PhysGesellschaft Berlin, TU Berlin, Pro Physik, AIP, AEI, MPI-KGF, GFZ, HMI, PIK, AWI, Max Planck Institute for the History of Science, Mathematik, DPG Disputationen, & Vorschau UP

Udo Schwarz, Zentrum für Dynamik komplexer Systeme,
Universität Potsdam, Campus Golm Karl-Liebknecht-Str. 24, 14476 Potsdam, building 28, room 2.107
Phone: (+49-331) 977-1658, Fax : (+49-331) 977-1045

Email: Udo.Schwarz AT uni-potsdam.de

DFG SFB 1294

DFG Sonderforschungsbereich 1294 Data assimilation

DFG SPP 1488

DFG Schwerpunktprogramm 1488 Planetmag


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