2 papers
adap-org1996
A model of macroevolution with a natural system size
D. A. Head, G. J. Rodgers
We describe a simple model of evolution which incorporates the branching and extinction of species lines, and also includes abiotic influences. A first principles approach is taken…
cond-mat1996
Crossover to Self-Organized Criticality in an Inertial Sandpile Model
D. A. Head, G. J. Rodgers
We introduce a one-dimensional sandpile model which incorporates particle inertia. The inertial dynamics are governed by a new parameter which, as it passes through a threshold val…