ITM Probe is a web application for modelling information flow in interaction networks based on discrete time random walks.
Each random walk simulates a possible information path. A walker starts at a node in the network and at each discrete time step moves randomly to a node that is adjacent to its originating node. The probability of moving to a particular destination node is proportional to the weight of the link from the originating node to it. Unlike the classical random walks, our framework allows the walker a certain probability to dissipate, that is, to leave the network at each step. Each walk terminates either by dissipation or by reaching a boundary node.
We distinguish two types of boundary nodes: sources and sinks. Each source serves as origin of random walks and hence emits information, while each sink absorbs information. ITM Probe framework contains three general modes: absorbing, emitting, and channel.
Please refer to ITM Probe documentation or the references below for more information.