Bacterial species Bacillus subtilis is known to exhibit various colony patterns, depending on the substrate softness and nutrient concentration. We have examined the self-affinity and roughness exponent α for growing interfaces of colonies which belong to regions B (Eden-like) and D (disk-like)...

A reversible cluster growth model in which particles (sites) at singly bonded tip positions can evaporate with equal probability and condense on another (or the same) cluster has been investigated using computer simulations. Both two-dimensional (square lattice) and three-dimensional (cubic...