Using DSHM to Model Paper, Rock, Scissors

Vortices determine the dynamics of biodiversity in cyclical interactions with protection spillovers

If rock beats scissors and scissors beat paper, onemight assume that rock beats paper too. But this is not the case for intransitive relationships thatmake up the famous rock-paper-scissors game. However, the sole presence of papermight prevent rock frombeating scissors, simply because paper beats rock. This is the blueprint for the rock-paper-scissors gamewith protection spillovers, which has ...

Spiraling patterns in evolutionary models inspired by bacterial games with cyclic dominance1

Understanding the mechanisms allowing the maintenance of biodiversity is a central issue in biology. Evolutionary game theory, where the success of one species depends on what the others are doing, provides a promising framework to investigate this complex problem. Experiments on microbial populations have shown that cyclic local interactions promote species coexistence. In this context, rock-p...

" Expert Rock, Paper, Scissors: " Can Computers Play " Rock, Paper, Scissors " Better than Humans?

Modeling The Fan Effect Using Dynamically Structured Holographic Memory

Dynamically Structured Holographic Memory (DSHM), a system based on holographic reduced representations, designed for modeling memory is described. A DSHM model of the fan effect (Anderson, 1974) is presented. Comparisons between the DSHM model and an existing ACT-R model (Anderson & Reder, 1999) are made. It is argued that DSHM can be interpreted as providing a lower-level account of several f...

Stability and Evolution in Rock-paper-scissors Ecologies

Four aspects of rock-paper-scissors ecosystems are considered. In the first, the effects of variations in the population’s spatial structure are described. With a lattice-based spatial structure, three-species coexistence is unstable when dispersal is long-range, but becomes stable at a critical threshold as the dispersal distance is gradually reduced. A continuous-space model is constructed an...