Supplementary materials. Exploring Tehran with excitable medium

These are videos of excitation waves propagating on a fragment of street network of Tehran. These are supplementary materials for the paper "Exploring Tehran with excitable medium" (2018). 

Abstract 

An excitable chemical medium --- Belousov-Zhabotinsky (BZ) reaction --- is proven to be a fruitful substrate for prototyping unconventional computing devices. These include image processors, logical circuits, and robot controllers. We study a BZ potential for characterising a geometry of a street networks on a fragment of Tehran street map. The city was chosen because it is one of the most populated cities in the World with nearly uncontrollable urban growth. In numerical experiments with Oregonator model of BZ reaction  we demonstrate that excitability of the medium allows acts as a selector between omnidirectional waves and soliton-like localised ex citations.  We uncover a phase-transition like dynamics, controlled by the excitability,  of  coverage of the street network by excitation wave-fronts.