Aging in autonomic control by multifractal studies of cardiac interbeat intervals in the VLF band.

The heart rate responds dynamically to various intrinsic and environmental stimuli. The autonomic nervous system is said to play a major role in this response. Multifractal analysis offers a novel method to assess the response of cardiac interbeat intervals.

Stationary states of Toom cellular automata in simulations.

Stationary states of Toom probabilistic cellular automata are tested in computer experiments. The aim of the tests is to identify the features characterizing the equilibrium states understood as in statistical mechanics. Namely, we investigate the following: scaling laws that involve critical parameters beta, gamma, and nu, locality of the interactions, and density of the relative entropy between stationary states.