Results 241 to 250 of about 3,734,088 (300)

A biologic model of parasystole

The American Journal of Cardiology, 1979
The electrotonic interactions of a parasystolic pacemaker with ventricular responses to the normal pacemaker across an area of depressed excitability were simulated in a model consisting of strands of canine Purkinje fibers mounted in a sucrose gap preparation.
J, Jalife, G K, Moe
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A model of biological indeterminacy

Journal of Theoretical Biology, 1972
Abstract It is a known mathematical fact that the introduction of statistical indeterminacy by means of quantum mechanics (including statistical mechanics) has not loosened up theoretical physics enough so that theoretical biologists could go essentially beyond reductionism. A different type of indeterminacy, designated biological, is introduced here,
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The development of largangians for biological models

Bulletin of Mathematical Biology, 1982
A modern theory of the calculus of variations is used to form necessary and sufficient conditions for the existence of a Lagrangian representation of a system of first-order ordinary differential equations. There exists a theorem to the effect that when a system of ordinary differential equations is variationally self-adjoint, the fulfillment of such ...
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