The four-volume set LNAI 6881- LNAI 6884 constitutes the refereed proceedings of the 15th International Conference on Knowlege-Based Intelligent Information and Engineering Systems, KES 2011, held in Kaiserslautern, Germany, in September 2011. The four-volume set LNAI 6881-LNAI 6884 constitutes the refereed proceedings of the 15th International Conference on Knowledge-Based Intelligent Information and Engineering Systems, KES 2011, held in Kaiserslautern, Germany, in September 2011. Part 2: The total of 244 high-quality papers presented were carefully reviewed and selected from numerous submissions. The 70 papers of Part 2 are organized in topical sections on web intelligence, text and multimedia mining and retrieval, intelligent tutoring systems and e-learning environments, other / misc. intelligent systems topics, methods and techniques of artificial and computational intelligence in economics, finance and decision making, workshop on seamless integration of semantic technologies in computer-supported office work (sistcow), innovations in chance discovery, advanced knowledge-based systems, recent trends in knowledge engineering, smart systems, and their applications. Prof. Dr. Andreas Dengel ist Wissenschaftlicher Direktor am Deutschen Forschungszentrum für Künstliche Intelligenz (DFKI) in Kaiserslautern, Professor für Informatik an der Technischen Universität Kaiserslautern und Honorarprofessor am Dept. of Computer Science and Intelligent Systems der Graduate School of Engineering an der Osaka Prefecture University und arbeitet mit seiner Gruppe seit vielen Jahren auf dem Gebiet Semantischer Technologien.
