[This is the old program from WS 2009/10. The current program and contact information can be found here.]

25 September 2009, 16:00

Arik Yochelis (Department of Chemical Engineering, Technion, Haifa, Israel)
Towards Biochemical Control of Physiological Self-Organization [Abstract]

23 October 2009, 16:00

Takao Ohta (Department of Physics, Kyoto University, Japan)
Dynamics of deformable self-propelled particles [Abstract]

30 October 2009, 16:00

Fred Wolf (Max-Planck-Institut für Dynamik und Selbstorganisation, Göttingen)
Universality and self-organization in the evolution of the visual cortex [Abstract]

06 November 2009, 16:00

Yasuaki Kobayashi (Fritz-Haber-Institut der Max-Planck-Gesellschaft)
Design of multi-cluster and desynchronized states in oscillatory media by nonlinear global feedback [Abstract]

08 January 2010, 16:00

Rudolf Friedrich (Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster)
Ratchet effect and the inverse cascade of turbulence  CANCELLED DUE TO ILLNESS!

Abstract:
The main characteristics of turbulent flows is the existence of the energy cascade: Large vortical motions are unstable with respect to smaller vortices leading to a spatio-temporal organisation of the fields exhibiting selfsimilarity in space and time. Stationary turbulent fields are characterized by a flux equilibrium where energy is stored at large scales and dissipated at small scales leading to a nonequilibrium transport process of energy across scales.
We have investigated this nonequilibrium transport process by a combination of analytical methods based on the formulation of kinetic equations and direct numerical simulations. Our results show that for the case of the inverse energy cascade observed in two dimensional turbulent flows transport is not a simple anomalous diffusion process but is based on a kind of ratchet effect and, as a consequence, resembles the behaviour of Brownian motors. In my talk I will outline the details of this nonequilibrium transport process.

12 February 2010, 16:00

Ulrich Parlitz (Drittes Physikalisches Institut, Universität Göttingen)
Nonlinear modeling and data analysis [Abstract]