Demonstration for Dispersion and Dissipation

The simulations solve equation

Pulse: s = 1 , d₂ = 0 , d₃ = 0 (in.1) movie

Beating: s = 2 , d₂ = 0 , d₃ = 1, positive group velocity (in.3)movie

Beating: s = 2 , d₂ = 0 , d₃ = 4, negative group velocity (in.2)movie

Pulse with dissipation: s = 1 , d₂ = 0.2 , d₃ = 0 (in.5)movie

Pulse with dispersion: s = 1 , d₂ = 0 , d₃ = 1 (in.4)movie