Dr. Marek Hatala is Associate Professor at the School Interactive Arts and Technology at Simon Fraser University and a director of the Laboratory for Ontological Research. Dr. Hatala received his MSc in Computer Science and Ph.D. in Cybernetics and Artificial Intelligence from the Technical University of Kosice. His primary interests lie in areas of knowledge representation, ontologies and the semantic Web, user modeling, intelligent information retrieval, organizational learning and eLearning. His current research looks at how semantic technologies can be applied to achieve interoperability in highly distributed and heterogeneous environments, what the social and technical aspects of building a distributed trust infrastructures are, and what role user and user group modeling can play in interactive and ubiquitous environments. Dr. Hatalaâ€™s research has been funded by NSERC, SSHRC, Canarie, Canadian Heritage, the A.W.Mellon Foundation, as well as by industry.