The fragmentation and restructuring under shear of agglomerates of fine mineral particles are studied with the Distinct Element Method. The model used takes into account contact forces, van der Waals forces, and hydrodynamic forces computed with the free-draining approximation. A loose initial...

The percolation of small particles through a periodic random loose packing of large beads is studied numerically with the Distinct Element Method. The representativity of periodic mono-sized sphere packing of varying system size was first studied by comparing their pore size distributions and...

Computer modelling for evolutionary systems consists in: (1) to store in the memory the individual features of each member of a large population; and (2) to update the whole system repeatedly, as time goes by, according to some prescribed rules (reproduction, death, ageing, etc.) where some...

The extended XY-model, a classical system of planar rotators with nearest neighbor interaction, is studied with molecular dynamics simulations. This model exhibits a first-order phase transition between a low-temperature phase with algebraic decay of spatial correlations and a high-temperature...

Time evolution of a model of population of diploid organisms is studied using the Monte Carlo technique. Reproduction of the individuals follows the Mendelian rules, including the recombination. We compare the effects of harmful mutations and changes of the environment on the population size,...

Tracer and collective diffusion of repulsively interacting particles adsorbed on a random AB alloy surface (Nieto, Uebing, Eur. Phys. J. B 1 (1998) 523) are studied by means of Monte Carlo modelling. Adsorption isotherms and the thermodynamic factors are obtained via simulations in the...

We investigate optimal strategies to defend valuable goods against the attacks of a thief. Given the value of the goods and the probability of success for the thief, we look for the strategy that assures the largest benefit to each player irrespective of the strategy of his opponent. Two...

As cell proliferation is limited due to the loss of telomere repeats in DNA of normal somatic cells during division, telomere attrition can possibly play an important role in determining the maximum life span of organisms as well as contribute to the process of biological ageing. With computer...

In this paper, a simple (2+1) solid-on-solid model of the epitaxial films growth based on random deposition followed by breaking particle–particle lateral bonds and particles surface diffusion is introduced. The influence of the critical number of the particle–particle lateral bonds z and...

The kink density and its influence on the growth velocity in the kinetic BCSOS model are studied using an exact finite-size analysis based on the transition matrix method and a kinetic Monte Carlo simulation at equilibrium and during growth. The bcc(001) surface fluctuates in the model through...