Monday, May 14, 2018 - 10:00am - 10:50am
Hong Qian (University of Washington)
There is a growing awareness toward a slow shifting in the foundation of the thermodynamic laws, from several macroscopic, empirical postulates concerning heat as a form of random motions, to derivable mathematical theorems based on stochastic dynamics of mesoscopic systems. It becomes increasingly clear that a stochastic dynamic description of the Nature is a very effective mathematical representation of the Reality.
Thursday, September 24, 2015 - 11:00am - 12:00pm
Abraham Jan (Arjan) van der Schaft (Rijksuniversiteit te Groningen)
While complexity and large-scale systems have always been important themes in systems and control theory, the current flowering of network dynamics and control was not so easy to predict. Two main reasons for the enormous research activity are the ubiquity of large-scale networks in a large number of application areas (from power networks to systems biology) and the happy marriage between on the one hand systems and control theory and algebraic graph theory on the other. In this talk we will concentrate on network dynamics with a clear physical structure.
Friday, July 24, 2015 - 9:00am - 9:50am
Yuan-Nan Young (New Jersey Institute of Technology)
Membrane fluctuation and dynamics under an electric field is investigated, and results show that the membrane instability and dynamics depend not only on the mismatch in conductivity and permittivity between the bulk fluids, but also on the membrane charging time. In addition, the (entropic) membrane tension is found to depend on the electric field. Lubrication theory is utilized to examine the nonlinear dynamics of a planar lipid bilayer membrane with and without electrokinetics.
Tuesday, June 4, 2013 - 3:00pm - 3:30pm
Miroslav Kramar (Rutgers, The State University Of New Jersey )
Persistence diagrams are extremely useful for describing complicated patterns in a simple but meaningful way. We will demonstrate this idea on the patterns appearing in the convection flows and granular media. This procedure allows us to transform samples from the experiment into a point cloud in the space of persistence diagrams. The space of persistence diagrams is a complete metric space. There is a whole family of matrices on this space.
Wednesday, July 23, 2008 - 3:05pm - 3:15pm
Konstantin Turitsyn (University of Chicago)
Recent experiments by Kantsler et al. [Phys. Rev. Lett. 99, 178102 (2007)] have shown that the relaxational dynamics of a vesicle in external elongation flow is accompanied by the formation of wrinkles on a membrane. Motivated by these experiments we present a theory describing the dynamics of a wrinkled membrane. The formation of wrinkles is related to the dynamical instability induced by negative surface tension of the membrane. For quasispherical vesicles we perform analytical study of the wrinkle structure dynamics.
Friday, January 18, 2008 - 10:50am - 11:20am
Krzysztof Kuczera (University of Kansas)
We report on replica-exchange simulations of the folding of a 21-residue alpha-helical peptide in explicit solvent. Using eight replicas over a 280-450 K temperature range, we were able to simulate both the folding equilibrium and the helix formation process. While the melting temperature was exaggerated by about 50 K, the folding enthalpy and entropy were in good agreement with experimental data. Simulations of the helix formation process showed a sequential mechanism, with helical structures formed within ca.
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