Hector is interested in artificial intelligence and cognitive science, having worked on both planning and plan recognition methods for generating and recognizing autonomous behavior using model-based methods. He is an ICREA Research Professor at the Universitat Pompeu Fabra in Barcelona where he heads the AI group and directs the Master in Intelligent Interactive Systems. He was born and grew up in Buenos Aires, and then obtained an EE degree from the Universidad Simón BolÃvar in Caracas, and a Ph.D. in Computer Science from UCLA. He received the 1990 ACM Dissertation Award for a thesis done under the supervision of Judea Pearl, and the 2009 and 2010 ICAPS Influential Paper Awards. Hector is a fellow of AAAI and ECCAI, and Associate Editor of Artificial Intelligence and the Journal of Artificial Intelligence Research. He is the author of the book Default Reasoning, MIT Press, 1992, and co-editor with Rina Dechter and Joseph Halpern of the book Heuristics, Probability and Causality: ATribute to Judea Pearl, College Publications, 2010.Blai is a Professor in the Computer Science Department at Universidad Simon Bolivar in Caracas, Venezuela. His main research interests are automated planning, knowledge representation and search. He obtained B.Sc. and M.Sc. degrees in Computer Science from Universidad Simon Bolivar and a Ph.D. in Computer Science from UCLA. He received the 2009 ICAPS Influential Paper Award. Blai is Associate Editor of Artificial Intelligence and the Journal of Artificial Intelligence Research, and member of the Executive Council of ICAPS (Int. Conf. on Automated Planning and Scheduling).