The present book includes a set of selected papers from the First International Conf- ence on Agents and Artificial Intelligence (ICAART 2009), held in Porto, Portugal, during January 1921, 2009. The conference was organized in two simultaneous tracks: Artificial Intelligence and Agents. The book is based on the same structure. ICAART 2009 received 161 paper submissions, from more than 37 different co- tries in all continents. After a blind review process, only 26 where accepted as full papers, of which 21 were selected for inclusion in this book, based on the classifi- tions provided by the Program Committee. The selected papers reflect the interdis- plinary nature of the conference. The diversity of topics is an important feature of this conference, enabling an overall perception of several important scientific and tech- logical trends. These high-quality standards will be maintained and reinforced at ICAART 2010, to be held in Valencia, Spain, and in future editions of this conf- ence. Furthermore, ICAART 2009 included five plenary keynote lectures given by Juan Carlos Augusto (University of Ulster), Marco Dorigo (IRIDIA, Free University of Brussels), Timo Honkela (Helsinki University of Technology), Edward H. Shortliffe (Arizona State University) and Paulo Urbano (University of Lisbon). We would like to express our appreciation to all of them and in particular to those who took the time to contribute with a paper to this book.

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Inhalt
Invited Speakers.- Past, Present and Future of Ambient Intelligence and Smart Environments.- I: Artificial Intelligence.- Modelling Social Learning of Adolescence-Limited Criminal Behaviour.- How Do Emotions Induce Dominant Learners' Mental States Predicted from Their Brainwaves?.- A Multiagent Semantics for the Game Description Language.- Verifying Context-Dependent Reduction Relations for Knowledge Specifications.- Combining Artificial Intelligence Techniques for the Training of Power System Control Centre Operators.- Adaptive State Space Abstraction Using Neuroevolution.- Goal-Based Game Tree Search for Complex Domains.- Generating Incomplete Data with DataZapper.- Extending Learning Vector Quantization for Classifying Data with Categorical Values.- Action Knowledge Acquisition with Opmaker2.- Application of Hidden Topic Markov Models on Spoken Dialogue Systems.- Gossip Galore: An Embodied Conversational Agent for Collecting and Sharing Pop Trivia from the Web.- Biosignal Based Discrimination between Slight and Strong Driver Hypovigilance by Support-Vector Machines.- II: Agents.- Tiered Logic for Agents in Contexts.- HomeManager: Testing Agent-Oriented Software Engineering in Home Intelligence.- Developing Multi-Agent Systems through Integrating Prometheus, INGENIAS and ICARO-T.- An Efficient Winner Approximation for a Series of Combinatorial Auctions.- How to Integrate Personalization and Trust in an Agent Network.- Modeling Two Stage Preventive Medical Checkup Systems with Social Science Approaches.- Translating Discrete Multi-Agents Systems into Cellular Automata: Application to Diffusion-Limited Aggregation.- Using Values to Turn Agents into Characters.