676 citations · 3.2k across the 68 of their papers we have counts for
6 papers · 1 filter
Self-organized Vortex State in Two-dimensional Dictyostelium Dynamics
Wouter-Jan Rappel, Alastair Nicol, Armand Sarkissian +2
We present results of experiments on the dynamics of Dictyostelium discoideum in a novel set-up which constraints cell motion to a plane. After aggregation, the amoebae collect int…
Mutator Dynamics on a Smooth Evolutionary Landscape
David A. Kessler, Herbert Levine
We investigate a model of evolutionary dynamics on a smooth landscape which features a ``mutator'' allele whose effect is to increase the mutation rate. We show that the expected p…
Unicellular algal growth: A biomechanical approach to cell wall dynamics
Royce Kam, Herbert Levine
We present a model for unicellular algal growth as motivated by several experiments implicating the importance of calcium ions and ``loosening'' enzymes in morphogenesis. A growing…
Diffusive Boundary Layers in the Free-Surface Excitable Medium Spiral
David A. Kessler, Herbert Levine
Spiral waves are a ubiquitous feature of the nonequilibrium dynamics of a great variety of excitable systems. In the limit of a large separation in timescale between fast excitatio…
Front Stability in Mean Field Models of Diffusion Limited Growth
Douglas Ridgway, Herb Levine, Yuhai Tu
We present calculations of the stability of planar fronts in two mean field models of diffusion limited growth. The steady state solution for the front can exist for a continuous f…
Aggregation Patterns in Stressed Bacteria
Lev Tsimring, Herbert Levine, Igor Aranson +3
We study the formation of spot patterns seen in a variety of bacterial species when the bacteria are subjected to oxidative stress due to hazardous byproducts of respiration. Our a…