Advances in artificial intelligence--IBERAMIA-SBIA 2006 : 2nd international joint conference: 10th Ibero-American Conference on AI, 18th Brazilian AI Symposium, Ribeirao Preto, Brazil, October 23-27, 2006 : proceedings - Sichman, Jaime S. (Jaime Simão); Goelho, Helder; Rezende, Solange Oliveira (Springer, 2006)