We define a case of recursive functions on the reals analogous to the classical recursive functions on the natural numbers, corresponding to a conceptual analog computer that operates in continuous time. This class turns out to be surprisingly large, and includes many functions which are...

Recombination, including chromosomal segregation, shuffles together the genetic material carried by different members of a sexual species. This genetic mixing unties the evolutionary fate of alles at one locus from the fate of alleles at neighboring loci and can increase the amount of genetic...

Large scale gene perturbation experiments generate information about the number of genes whose activity is directly or indirectly affected by a gene perturbation. From this information, one can numerically estimate coarse structural network features such as the total number of direct regulatory...

The basic role of fiat money in a dynamic economy is considered. Its role as a virtual asset whose store of value properties are the outcome of the dynamics is explored and the role of the limits on the money supply and the bankruptcy laws in bounding prices are considered. The actions of the...

In this paper, we examine the conditions that allow increased recombination to evolve in the presence of recurrent deleterious mutation. We focus on a three-locus model first studied by Feldman et al. (1980), which follows the dynamics of a modifier locus that alters the recombination rate...

Allometric scaling relationships, including the $3/4$-power law for metabolic rates, which are characteristic of all organisms, are derived from a general model that describes how essential materials are transported through space-filling fractal networks of branching tubes. The model assumes...

Computer simulation modeling for policy development in planning has had difficulty gaining a consistent foothold. Reasons for this include bad experiences with large-scale, comprehensive models (e.g., Forrester, 1969) and the lack of theory that one can quantify (Batty, 1994). Batty (1994) has...

The evolution of cooperation often requires genetic similarity among interactors. For populations that are divided into groups such that a given trait affects all group members, this requires positive assortment of individuals into groups, i.e., that individuals are more similar to other group...

The Superconducting Super Collider (SSC) is a major project promising to open the vistas of very high energy particle physics. When the SSC is in operation, data will be produced at a staggering rate. Current estimates place the raw data coming out of the proposed silicon detector system at $2.5...

We describe in detail a new and highly effcient algorithm for studying site or bond percolation on any lattice. The algorithm can measure an observable quantity in a percolation system for all values of the site or bond occupation probability from zero to one in an amount of time which scales...