Learning is frequently proposed as a mechanism that enables an individual to adapt to changes in the environment during its lifetime (Levins, 1968; Stephens, 1991). These studies generally take as their point of departure the Òabsolute fixity argument.Ó That is, in an absolutely fixed environment,...

Swarm is a simulation environment which facilitates development and experimentation with simulations involving a large number of agents behaving and interacting within a dynamic environment. Many of the computer simulations performed by researchers in various disciplines rest upon a very similar...

We propose an extension to multivariate time series of the phase-randomized Fourier-transform algorithm for generating surrogate data. Such surrogate data sets must mimic not only the autoncorrelations of each of the variables in the original data set, they must minic the cross-correlations...

We exhibit a quantum circuit that performs the Quantum Fourier Transform on $n$ qubits in $ (n)$ depth. Thus, a parallel quantum computer can carry out the QFT in linear time. We conjecture that this can, in fact, be reduced to $ ({\rm log} n)$ depth, which would place the QFT in the class {\bf...

Success and efficiency of Darwinian evolution is based on the dichotomy of genotype and phenotype: The former is the object under variation whereas the latter constitutes the target of selection. Genotype-phenotype relations are highly complex and hence variation and selection appear...

An agent-based computational model of Long House Valley, in northern Arizona near Monument Valley, is described and demontrated. The model, that runs from about AD 400 to 1400, consists of artificial adaptive agents (households) who inhabit a digitized version of the Long House Valley landscape....

A new mathematical representaion is proposed for the configuration space structure induced by recombination which we called "P-structure." It consists of a mapping of pairs of objects to the power set of all objects in the search space. The mapping assigns to each pair of parental "genotypes"...

Following Pollack, we consider a model of analog computer which can recognize various languages in real time. We encode an input word as a point in R[super d] by composing iterated maps, and then apply inequalities to the resulting point to test for membership in the language. <p> Each class of...</p>