We report on the persistence decay of cell clusters in dynamical simulation of two-dimensional soap-froth as a function of the cluster volume fraction. Both slow gas diffusion and fast dynamical topological processes between cells are incorporated in the simulation. While the simulation yields decay rate in good agreement with two-dimensional soap-froth experiment, it shows a faster decay in co...

The estimation of metallurgical parameters of flotation process from froth visual features is the ultimate goal of a machine vision based control system. In this study, a batch flotation system was operated under different process conditions and metallurgical parameters and froth image data were determined simultaneously. Algorithms have been developed for measuring textural and physical froth ...

The occurence of polygonal structures is widespread in nature 1]. Extensive investigations on the statistics of two-dimensional networks have been performed for biological tissues 2, 3], clusters of metal grains 4, 5], systems of soap bubbles 6, 7, 8], emulsion lattices 9], gas bubbles in Lang-muir monolayers 10], magnetic froth 11] or convective patterns in hydrody-namics 12, 13, 14]. The stro...

was going to vomit and turned him on his side. Instead of vomit, however, froth, reddish in colour, began to pour from his mouth and nostrils, and he became cyanosed. The froth was cleared out of his mouth, but it refilled again immediately. We then drew him up the table and allowed his head to hangover the end, in order that the froth might run out, and his mouth was wiped out again and again....

The damage spreading of the Ising model on several two-dimensional trivalent structures, including soap froth, Voronoi, and hierarchical structures, are studied with competing Glauber and Kawasaki dynamics. The damage spreading transition temperature T(d) and the Curie temperature T(C) of these structures are compared. We find that T(d) of the hierarchical lattices decreases sharply as the prob...