A critical concentration is defined which separates two kinds of behavior of the size distribution of micellar aggregates of surfactant molecules. Below this concentration, the size distribution is a monotonic decreasing function of size; above this concentration, the size distribution is a function exhibiting two extrema and the contribution of larger aggregates becomes important. Quantitative...

The phase transition with respect to the intensity of a d-correlated noise source has been studied in a coupled map lattice that simulates the excitability of field-type neural tissues [7]. The entropy of lattice states versus this control parameter undergoes a qualitative change at the phase transition point. Its behavior is linear on one side of this point and it transforms to a cubic-root fo...