648 citations · 721 across the 13 of their papers we have counts for
7 papers · 1 filter
Fragmentation Experiment and Model for Falling Mercury Drops
P. M. C. de Oliveira, C. A. F. Leite, C. V. Chianca +2
The experiment consists of counting and measuring the size of the many fragments observed after the fall of a mercury drop on the floor. The size distribution follows a power-law f…
Penna bit-string model with constant population
S. Moss de Oliveira, P. M. C de Oliveira, J. S. Sa Martins
We removed from the Penna model for biological ageing any random killing Verhulst factor. Deaths are due only to genetic diseases and the population size is fixed, instead of fluct…
Asymmetry in hierarchy model of Bonabeau et al
D. Stauffer, J. S. Sa Martins
The 1995 model of Bonabeau et al. explains the emergence of social hierarchies through randomness, but gives as many leaders as followers. A simple modification allows a more reali…
Simulation of Galam's contrarian opinions
D. Stauffer, J. S. Sa Martins
Galam's model of people voting always against the majority is shown to give for the quenched case different results than the original annealed model. For people diffusing on a latt…
The evolutionary advantage of diploid sex
A. O. Sousa, S. Moss de Oliveira, J. S. Sa Martins
We modify the Penna Model for biological aging, which is based on the mutation-accumulation theory, in order to verify if there would be any evolutionary advantage of triploid over…
Abelian threshold models and forced weakening
Eric F. Preston, Jorge S. Sá Martins, John B. Rundle
Mean field slider block models have provided an important entry point for understanding the behavior of discrete driven threshold systems. We present a method of constructing these…
Random deaths in a computational model for age-structured populations
J. S. Sa' Martins, S. Cebrat
The concept of random deaths in a computational model for population dynamics is critically examined. We claim that it is just an artifact, albeit useful, of computational models t…