are no more nodes to fire or in the case of marker passing from multiple origins, when a node is reached from more than one path. Variations of the algorithm that permit repeated node firings and activation loops in the graph, terminate after a steady activation state, with respect to some delta, is reached, or when a maximum number of iterations is exceeded. Examples See also Connectionism Notes References Nils J. Nilsson. "Artificial Intelligence: A New Synthesis". Morgan Kaufmann Publishers, Inc., San Francisco, California, 1998, pages 121-122 Rodriguez, M.A., " Grammar-Based Random Walkers in Semantic Networks", Knowledge-Based Systems, 21(7), 727-739, , 2008. Karalyn Patterson, Peter J. Nestor & Timothy T. Rogers "Where do you know what you know? The representation of semantic knowledge in the human brain", Nature Reviews Neuroscience 8, 976-987 (December 2007) Semantics Psycholinguistics Memory Artificial intelligence Algorithms Search algorithms Graph algorithms