17th Annual Conference of the Japanese Society for Artificial Intelligence (JSAI 2003) - Award-Winning Papers -- Award-Winning Papers (Overview) -- Analysis of Hepatitis Dataset by Decision Tree Based on Graph-Based Induction -- Efficient Algorithms for Finding Frequent Substructures from Semi-structured Data Streams -- Bus Information System Based on User Models and Dynamic Generation of VoiceXML Scripts -- Robotic Communication Terminals as a Ubiquitous System for Improving Human Mobility by Making Environment Virtually Barrier-Free -- International Workshop on Agent-Based Modeling -- Workshop on Agent-Based Modeling -- Mechanism Design for Environmental Issues -- Cooperative Behavior with Common Information Controller in Minority Game -- Analysis of Efficiency and Accuracy of Learning in Minority Games -- A Partitioned Random Network Agent Model for Organizational Sectionalism Studies -- Analyzing and Taming Collective Learning of a Multiagent System with Connected Replicator Dynamics -- International Workshop: From Semantic Web to Semantic World -- Semantic Authoring and Semantic Computing -- Social Summarization for Semantic Society -- Discussion Mining: Knowledge Discovery from Semantically Annotated Discussion Content -- Semantic Computing with Conversations and Stories -- 18th Annual Conference of the Japanese Society for Artificial Intelligence (JSAI 2004) - Award-Winning Papers -- Award-Winning Papers (Overview) -- Effective Dimension in Anomaly Detection: Its Application to Computer Systems -- Document Retrieval Using Feedback of Non-relevant Documents -- Tagging for Intelligent Processing of Design Information -- Application and Analysis of Interpersonal Networks for a Community Support System -- Dynamic Social Simulation with Multi-agents Having Internal Dynamics -- Human-RobotCooperative Sweeping Using Commands Embedded in Actions -- Discovery of Skills from Motion Data -- Emergence and Evolution of Linguistic Communication -- Emergence and Evolution of Linguistic Communication -- The Emergence of Language in Grounded Adaptive Agents and Robots -- Exposure Dependent Creolization in Language Dynamics Equation -- Evolution of Birdsong Grammars -- Homophony and Disambiguation Through Sequential Processes in the Evolution of Language -- Mirroring, Deixis, and Interaction Topology in the Emergence of Shared Vocabularies -- A Role Sharing Model of Language Areas -- The Evolution of Writing Systems: Against the Gelbian Hypothesis -- The Emergence and Evolution of Graphical Productions -- Complex Vocal Behavior and Cortical-Medullar Projection -- Logic and Engineering of Natural Language Semantics -- Logic and Engineering of Natural Language Semantics 2004 -- Dynamic Predicate Logic of Dependent Questions and Answers -- On Dependency and Quantification in Dynamic Semantics -- Dynamic Interpretations and Interpretation Structures -- The Dynamics of a Japanese Reflexive Pronoun -- Dynamic Semantics at Work -- A Demonstrative Analysis of Anaphora in Hob-Nob Sentences -- Temporal Dynamic Semantics of Factual Counterfactuals -- English Present Perfect Revisited: -- Workshop on Active Mining -- Workshop on Active Mining (AM-2004) -- Spiral Discovery of a Separate Prediction Model from Chronic Hepatitis Data -- Process to Discovering Iron Decrease as Chance to Use Interferon to Hepatitis B -- A Novel Hybrid Approach for Interestingness Analysis of Classification Rules -- Preliminary Evaluation of Discovered-Rule-Filtering Methods -- Proposal of Relevance Feedback Based on Interactive Keyword Map -- A Correlation-Based Approach to Attribute Selection in Chemical Graph Mining -- Improving Multiclass ILP by Combining Partial Rules with Winnow Algorithm: Results on Classification of Dopamine Antagonist Molecules -- Mining of Three-Dimensional Structural Fragments in Drug Molecules.