Special Issue on Knowledge Discovery

This Special Issue contains modified and extended versions of nine papers presented at the Fifteenth International Symposium on Methodologies for Intelligent Systems (ISMIS05) which took place in the Inn Hotel at Saratoga Springs, New York on May 25-28, 2005. The goal of ISMIS symposia [1], [2], [3], [4], [5], [6] is to provide a platform for a useful exchange between theoreticians and practitioners, and to foster the cross-fertilization of ideas in the following areas: Active Media, Human-Computer Interaction, Autonomic and Evolutionary Computation, Intelligent Agent Technology, Intelligent Information Retrieval, Intelligent Information Systems, Knowledge Representation and Integration, Knowledge Discovery and Data Mining, Logic for Artificial Intelligence, Soft Computing, Web Intelligence, Web Services. All papers presented in this special issue focus on problems related either directly or indirectly to knowledge discovery and data mining. ISMIS symposium has been organized to meet on annual basis (1986-1990). Since 1991, ISMIS meets only twice every three years (1991, 1993, 1994, 1996, 1997, 1999, 2000, 2002, 2003, 2005). The symposium was sponsored by DOD/US Army grant No. W911NF-05-1-0103. Editors of this special issue would like to dedicate it to Professor Zdzislaw Pawlak who passed away in Warsaw on April 7, 2006.