Figure 4

Schematic of the activity update in the dynamical fitness model. (a) Circular random walk of angle \(\theta_{i}\) on the unit circle. Activity level of bank i is given by \(a_{i} = |\cos{\theta_{i}}|\). (b) Activity level \(a_{i}\) evolves according to Eqs. (4) and (5) with reset probability \(h(a_{i})\)