Might be happy all the same that way

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Many creatures demonstrate various kinds of collective behavior: birds flock, fish shoal, cattle herd and even humans collaborate from time to time.

Determining the dynamics of this kind of behavior is a hot problem that has lead to a number of fundamental discoveries in recent years. Who would have imagined that bacterial colonies cooperate when they grow, that shoals of fish can make collective decisions and that an insect swarm can act seemingly as one? And yet the mathematics that describe these systems demonstrate how easily this kind of behavior can emerge.

Today, the mathematics of animal synchrony takes a cloven-footed step forward with the unveiling of a model that describes the collective behavior of cows.

Cows are well know for their collective behavior: they tend to either all lie down or all stand up for example. Jie Sun at Clarkson University in New York state and colleagues say that this behavior can be modelled by thinking of cows as simple oscillators: they either stand or lie and do this in cycles. These oscillators are also coupled: one form of coupling may be that a cow is more likely to lie down if those around it are lying down and vice versa.

The result is a mathematical model in which the collective behavior of cows can be studied in abstract.

{ The Physics arXiv Blog | Continue reading }