Effect of continuous radiation on the cell population (a) in the memory model (equation 2) and (b) the communication model (equation 3).

Note that the long time-spans considered are important to demonstrate the quasi-equilibrium behavior in the communication model, and the absence of this behavior in the memory model. Parameters were chosen as follows (a) α = 0.1, p = 0.05, c = 1, η = 0.01, x₀ = 100, y₀ = 0, z₀ = 0, w₀ = 0. (b) α = 0.1, p = 0.05, c = 1, η = 0.01, β₀ = 10, β₁ = 0, x₀ = 100, y₀ = 0, z₀ = 0, w₀ = 0.