Ofer Shochet

Novel type of phase transition in a system of self-driven particles

A simple model with a novel type of dynamics is introduced in order to investigate the emergence of self-ordered motion in systems of particles with biologically motivated interaction. In our model particles are driven with a constant absolute velocity and at each time step assume the average direction of motion of the particles in their neighborhood with some random perturbation

Adaptive self-organization during growth of bacterial colonies

(\ensuremath{\eta})

Aggregation Patterns in Stressed Bacteria.

added. We present numerical evidence that this model results in a kinetic phase transition from no transport (zero average velocity,

Holotransformations of bacterial colonies and genome cybernetics

|{\mathbf{v}}_{a}|\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0

Morphology transitions during non-equilibrium growth. II: Morphology diagram and characterization of the transition

) to finite net transport through spontaneous symmetry breaking of the rotational symmetry. The transition is continuous, since

Morphology transitions during non-equilibrium growth

|{\mathbf{v}}_{a}|

COOPERATIVE STRATEGIES IN FORMATION OF COMPLEX BACTERIAL PATTERNS

is found to scale as

Concentric decomposition during rapid compact growth

({\ensuremath{\eta}}_{c}\ensuremath{-}\ensuremath{\eta}{)}^{\ensuremath{\beta}}

Interfacial Pattern Formation in Biological Systems: Preliminary Observations During Growth of Bacterial Colonies

with

Einblick in physikalische Welten

\ensuremath{\beta}\ensuremath{\simeq}0.45