A computer model, named BOSCO 1, is described aimed to simulate evolution and growth of a wood composed of one single species of trees. The main computed variables are the number and size (wood volume) of the trees. The effects of climate and accidents are taken into account. The model is...

The contradiction between physical and economical sciences concerning the growth of the production/consumption mechanism is analyzed. It is then shown that if one wishes to keep the security level stable or to enhance it in a growing economy the cost of security grows faster than the gross...