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・ Excise tax in the United States
・ Excise Tax Reduction Act of 1954
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Excitable medium
・ Excitante
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・ Excitation (magnetic)
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・ Excitation-transfer theory
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・ Excitatory amino acid receptor agonist
・ Excitatory amino acid receptor antagonist
・ Excitatory amino acid receptor ligand
・ Excitatory amino acid reuptake inhibitor
・ Excitatory amino acid transporter


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Excitable medium : ウィキペディア英語版
Excitable medium
An excitable medium is a nonlinear dynamical system which has the capacity to propagate a wave of some description, and which cannot support the passing of another wave until a certain amount of time has passed (known as the refractory time).
A forest is an example of an excitable medium: if a wildfire burns through the forest, no fire can return to a burnt spot until the vegetation has gone through its refractory period and regrown. In chemistry, oscillating reactions are excitable media, for example the Belousov–Zhabotinsky reaction and the Briggs–Rauscher reaction. Pathological activities in the heart and brain can be modelled as excitable media. A group of spectators at a sporting event are an excitable medium, as can be observed in a Mexican wave (so-called from its initial appearance in the 1986 World Cup in Mexico).
==Modelling excitable media==

Excitable media can be modelled using both partial differential equations and cellular automata.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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