Karma model. Speed variations

Excitation cI(t) with period T at the left border is added to the system
    t E = DΔE + F(E, n) + c I(t)δ(x) = DΔE + [A - (n/nb)M][1 - tanh(E - 3)]E2/2 - E + c I(t)δ(x),
    ∂t n = H(E, n) = ε [Θ(E - 1) - n],
    I(t) ~ [cos(πt/T)]500,     δI(t)dt = 1.

M nb ε Δt Δx D T c

Ymin Ymax delay it fps
The script makes it time steps per frame. Really for large M wave speed doesn't depend on recovery state. But e.g. for M = 1 the first impulse is much faster.


Heart rhythms     updated 4 Dec 2011