Friday, September 16, 2011


My first paper on cow synchronization has now been published in final form.

Title: A Mathematical Model for the Dynamics and Synchronization of Cows

Authors: Jie Sun, Erik M. Bollt, Mason A. Porter, and Marian S. Dawkins

Abstract: We formulate a mathematical model for the daily activities of a cow (eating, lying down, and standing) in terms of a piecewise linear dynamical system. We analyze the properties of this bovine dynamical system representing the single animal and develop an exact integrative form as a discrete-time mapping. We then couple multiple cow "oscillators" together to study synchrony and cooperation in cattle herds. We comment on the relevant biology and discuss extensions of our model. With this abstract approach, we not only investigate equations with interesting dynamics but also develop biological predictions. In particular, our model illustrates that it is possible for cows to synchronize less when the coupling is increased.

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