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Fluctuating shells under pressure
Jayson Paulose, Gerard A. Vliegenthart, Gerhard Gompper +1
Thermal fluctuations strongly modify the large length-scale elastic behavior of crosslinked membranes, giving rise to scale-dependent elastic moduli. While thermal effects in flat…
How Does A Porous Shell Collapse? Delayed Buckling And Guided Folding Of Inhomogeneous Capsules
Sujit S. Datta, Shin-Hyun Kim, Jayson Paulose +3
Colloidal capsules can sustain an external osmotic pressure; however, for a sufficiently large pressure, they will ultimately buckle. This process can be strongly influenced by str…
Radial Domany-Kinzel Models with Mutation and Selection
Maxim O. Lavrentovich, Kirill S. Korolev, David R. Nelson
We study the effect of spatial structure, genetic drift, mutation, and selective pressure on the evolutionary dynamics in a simplified model of asexual organisms colonizing a new t…
Growth, competition and cooperation in spatial population genetics
Simone Pigolotti, Roberto Benzi, Prasad Perlekar Mogens H. Jensen +2
We study an individual based model describing competition in space between two different alleles. Although the model is similar in spirit to classic models of spatial population ge…
Dislocation-mediated growth of bacterial cell walls
Ariel Amir, David R. Nelson
Recent experiments have illuminated a remarkable growth mechanism of rod-shaped bacteria: proteins associated with cell wall extension move at constant velocity in circles oriented…
Selective sweeps in growing microbial colonies
Kirill S Korolev, Melanie J I Müller, Nilay Karahan +3
Evolutionary experiments with microbes are a powerful tool to study mutations and natural selection. These experiments, however, are often limited to the well-mixed environments of…