I would like to add an agent-based model for the last chapter of my book. The 
idea is to use a classic swarm as a model for a religious or political movement 
(since the basic rules like global attraction and local repulsion are 
isomorphic, as I argue in earlier chapters). The new thing is an "oblivion" 
factor which causes agents to forget the classic Boids swarm rules step by 
step. In order to keep the swarm from dissolving the model reinforces the rules 
every T timesteps, which simulates a rally, convention or congregation for the 
movement. Therefore the name "Oblivion Resistant Swarm" (ORS model) :-)As T 
varies, I expect to find some kind of phase transition in simulations where the 
swarm forms or dissolves. If T is too large, the swarm forgets the rules and is 
unable to maintain the form. If T is very small we get the classic Boids model 
and the swarm is able to form. Does that make any sense? Two more questions:1. 
Is two weeks a reasonable timespan for the time we need to learn new rules in 
general? 2. Do you know any existing ABMs which are similar? -J.
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