Rule and Decision Tree Learning.- Identification of Rules for Brain Metastases and Survival Time Prediction for Small Cell Lung Cancer Patients.- The Development of the AQ20 Learning System and Initial Experiments.- Discovering Multi-head Attributional Rules in Large Databases.- Melanoma Prediction Using k-Nearest Neighbor and LEM2 Algorithms.- Technologies for Sound Database Indexing: Musical Instrument Classification Methods.- Unsupervised Learning.- Significance Testing in the Grade Correspondence Analysis.- Ensembles of Similarity-based Models.- Regression - Yet Another Clustering Method.- Taxonomy Building: Cases or Attributes ?.- Using Grade Correspondence Analysis to Merge Populations and Detect Latent Orders.- Mining the Preference Relations and Preference Graphs.- Biologically Motivated Methods.- Multi-Dimensional Gaussian and Cauchy Mutations.- Statistical Genetic Algorithms.- Cellular Automata Approach to Scheduling Problem in Case of Modifications of a Program Graph.- Multimodal Optimization with Artificial Immune Systems.- Learning and Reasoning Under Uncertainty.- Bayesian Network Mining System.- Intelligent Techniques in Stock Analysis.- Models of Multiple Response Independence.- The Role of Support and Confidence in Collaborative Query Answering.- Logical Foundations of Ai.- Criteria and Functions for Expert Information Representation Choice.- Intelligent Computing Systems with Actors - Parallel Dynamic Programming Algorithm of the Polygon Triangulation Problem.- A Model for Extracting a Class of Knowledge Operators, Logic Disjunctions and Logic Alternatives from BDI Agents.- Information Dimension of a Population's Attractor and Population's Entropy.- Quantifier Handling Issues in Computer-Oriented Intuitionistic Calculi.- Verification of the Logic of Plausible Reasoning.- Author Index.