The authors have applied the CA/LGCA (“Cellular Automata”/ “Lattice Gas Cellular Automata”) methodology to develop and analyse models of spread of epidemics of infectious diseases. Object-Oriented Analysis and Design of the computer models has been performed using the Unified Modelling Language (UML). All required algorithms and data structures have been coded in C++.

We propose a new computational scheme of the Celada-Seiden model (CSmodel) for the simulation of the Immune System response. This new approach is closer to the classical definition of cellular automata than the previous. It has the advantage to achieve the same results obtained with the CSmodel (IMMSIM) with a lower computational effort. keywords: Immune System, CSmodel, Stochastic Cellular Aut...

We consider the use of power law distributions P (x) j x j ?1? (1 < 2) for lattice gas automata (LGA). (a) We implement the distribution P (`) for particle displacements with length j ` j in a LGA and we investigate the resulting diiusive transport. We show that anomalous diiusion (var(j ` j) t 2==) cannot be observed, but that normal diiusion (h` 2 i Dt) can be tuned so that the diiusion coeec...

A b stra ct . Lattice gas automata have been recently proposed as a new technique for the numerical integration of the two-dimensional Nav ier-Stokes equation. We have accurately tes ted a stra ightforward var iant of the original model, due to Fr isch, Hasslacher, and Pomeau, in a simp le geometry equivalent to two-dimensional Poiseuille (Cha nnel) flow dr iven by a uniform body force. The mom...

Conventional lattice gas automata consist of particles moving discretely on a xed lattice. While such models have been quite successful for a variety of uid ow problems, there are other systems, e.g., ow in a exible membrane or chemical self-assembly, in which the geometry is dynamical and coupled to the particle ow. Systems of this type seem to call for lattice gas models with dynamical geomet...

Lattice Boltzmann method is relatively new method in the field of computational fluid dynamics. It has been derived from lattice gas automata and is still under development. Basic steps of the LBM (collision, streaming, boundary conditions, macroscopic quantities) will be presented. Comparison with the finite difference method that uses Navier-Stokes equation on a lid driven cavity benchmark te...

Lattice gas cellular automata (Lgca) are particular cellular automata that imitate the behavior of particles moving on a lattice. We used a particular set of Lgca rules, called hpp, to mix bits in data blocks and obtain a symmetric cryptographic algorithm. The encryption and decryption keys are the positions of perturbation sites on the lattice (walls). Basically, this paper presents an origina...

Violation of (semi)-detailed balance conditions in lattice gas automata gives rise to unstable spatial fluctuations that lead to phase separation and pattern formation in spinodal decomposition, unstable propagating modes, driven diffusive systems and unstable uniform flows.