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Symmetry Breaking Of Escaping Ants
Symmetry breaking of escaping ants is a herd behaviour phenomenon observed when ants are constrained to a cell with two equidistant exits and then sprayed with an insect repellent. The ants tend to crowd one door more while trying to escape (i.e., there is a symmetry breaking in their escape behaviour), there by decreasing evacuation efficiency. Description This phenomenon arises in experiments where worker ants are enclosed into a circular cell with a glass cover in such a way that they can only move in two dimensions (i.e., ants cannot pass over one other). The cell has two exits located symmetrically relative to its center. The experiments consisted of two different set of trials. In the first set of trials, both exits were opened at the same time, letting the ants escape. After 30 repetitions, one door was used 13.666% more than the other. In the second set of trials, the configuration was identical, but a few seconds before opening the doors, a dose of 50 µL of an insect rep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herd Behaviour
Herd behavior is the behavior of individuals in a group acting collectively without centralized direction. Herd behavior occurs in animals in herds, packs, bird flocks, fish schools and so on, as well as in humans. Voting, demonstrations, riots, general strikes, sporting events, religious gatherings, everyday decision-making, judgement and opinion-forming, are all forms of human-based herd behavior. Raafat, Chater and Frith proposed an integrated approach to herding, describing two key issues, the mechanisms of transmission of thoughts or behavior between individuals and the patterns of connections between them. They suggested that bringing together diverse theoretical approaches of herding behavior illuminates the applicability of the concept to many domains, ranging from cognitive neuroscience to economics. Animal behavior A group of animals fleeing from a predator shows the nature of herd behavior, for example in 1971, in the oft cited article "Geometry For The Selfish He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |