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. Author manuscript; available in PMC: 2011 May 11.
Published in final edited form as: Europhys Lett. 2008 Sep 12;83(6):64005p1–64005p6. doi: 10.1209/0295-5075/83/64005

Figure 6.

Figure 6

(Color online) Solutions of eqs. (1) in the (x, y) plane with av = 0.5, using different initial stimuli. Dark colour implies larger values the u field; the propagation direction is from the top-left corner to the bottom-right corner. (a) Single wave propagation for R = 2.0. (b) Transient pacing and the formation of a finite number of target waves for R = 0.8. (c) Formation of a stable pacemaker and persistent target wave emission for R = 0.6. In all cases the perturbation amplitude is A = 0.3, with Δ = 0.1; the physical domain size is 20 × 20 with Neumann boundary conditions, and Δx = Δy = 0.005.