Title page -- Conference Organization -- Preface -- Contents -- Invited Talks -- Web Mining or the Wisdom of the Crowds -- AI at 50: From Programs to Solvers - Models and Techniques for General Intelligence -- Agents -- Scalable and Efficient Multiagent Platform Closer to the Operating System -- Designing Norms in Virtual Organizations -- Distributed Barter-Based Directory Services -- Trading Paper Clips - An Analysis of "Trading Up" in Artificial Societies Without Altruists -- Validation and Experimentation of a Tourism Recommender Agent Based on a Graded BDI Model -- Agent Negotiation Dissolution -- On Partial Deduction and Conversational Agents -- Robustness in Recurrent Auctions for Resource Allocation -- Using Electronic Institutions for Hospitals Chronic Disease Management and Purchasing System -- Categorization and Social Norms Support -- Constraints, Satisfiability, and Search -- How Hard Is a Commercial Puzzle: The Eternity II Challenge -- Random SAT Instances à la Carte -- Privacy in Distributed Meeting Scheduling -- Solving the Response Time Variability Problem by Means of Multi-Start and GRASP Metaheuristics -- An Algorithm Based on Structural Analysis for Model-Based Fault Diagnosis -- Knowledge and Information Systems -- Knowledge Discovery with Explained Case-Based Reasoning -- Improving Pseudobagging Techniques -- Knowledge Discovery on the Response to Neurorehabilitation Treatment of Patients with Traumatic Brain Injury Through an AI&Stats and Graphical Hybrid Methodology -- Using Ensemble-Based Reasoning to Help Experts in Melanoma Diagnosis -- Ergonomic Advice Through Case-Based Reasoning to Avoid Dangerous Positions Adopted Using the Computer -- Knowledge Representation and Logic -- Probabilistic Dynamic Belief Logic for Image and Reputation -- Aggregation Operators and Ruled Surfaces.

New Challenges: Group Decision Systems by Means of Entropy Defined Through Qualitative Reasoning Structures -- Machine Learning -- Voltage Sag Source Location from Extracted Rules Using Subgroup Discovery -- Statistical Monitoring of Injection Moulds -- On the Dimensions of Data Complexity Through Synthetic Data Sets -- Can Evolution Strategies Improve Learning Guidance in XCS? Design and Comparison with Genetic Algorithms Based XCS -- Intersection and Signed-Intersection Kernels for Intervals -- Multidisciplinary Topics and Applications -- Representation of Discrete Quasi-Copulas Through Non-Square Matrices -- A System to Extract Social Networks Based on the Processing of Information Obtained from Internet -- A Negotiation Styles Recommenders Approach Based on Computational Ecology -- CABRO: Winner Determination Algorithm for Single-Unit Combinatorial Auctions -- Nearest Neighbor Technique and Artificial Neural Networks for Short-Term Electric Consumptions Forecast -- Pattern Discovery in Melanoma Domain Using Partitional Clustering -- Reasoning About Plans, Processes, and Actions -- Using Ant Colony Systems with Pheromone Dispersion in the Traveling Salesman Problem -- Building Policies for Scrabble -- Robotics -- Monocular Object Pose Computation with the Foveal-Peripheral Camera of the Humanoid Robot Armar-III -- The SLAM Problem: A Survey -- An Approach for Mail-Robot Navigation Using a CBR Technique -- Representing Qualitative Trajectories by Autonomous Mobile Robots -- Object-Based Place Recognition for Mobile Robots Using Panoramas -- Motion Segmentation: A Review -- Uncertainty in AI -- On Fuzzy Description Logics -- An Interval-Based Approach for Fault Isolation and Identification in Continuous Dynamic Systems -- Effects of Orness and Dispersion on WOWA Sensitivity -- Keyword Index -- Author Index.