The sintering of non-cohesive particles is examined via granular dynamics techniques. In particular, the relevance of percolation theory to the sintering process is examined and it is shown that directed percolation may provide an adequate description at the sintering threshold for nearly...

A classification scheme for all Boolean cellular automata models involving an arbitrary number of inputs is proposed. The scheme is based upon counting the number of stable points for a given rule, i.e., points whose time development is stable with respect to small perturbations. When applied to...

Wonderland, a compact, integrated economic, demographic and environmental model, is investigated using methods developed for studying critical phenomena. Simulation results show the parameter space separates into two phases, one of which contains the property of long term, sustainable...