Prof. Antonio Kruger is a professor of computer science at Saarland University. He heads the Ubiquitous Media Technology Lab and is the scientific director of the Innovative Retail Laboratory at the German Research Center for AI (DFKI). Before that he was a professor at and the managing director of the Institute for Geoinformaitcs (ifgi) at the University of Munster. His research interests include mobile and ubiquitous spatial assistance systems, combining the research fields of intelligent user interfaces, user modeling, cognitive science, and ubiquitous computing. Dr. Tsvi Kuflik is a faculty member of the Management Information Systems Dept. in the Faculty of Social Sciences of the University of Haifa. His research interests include user modeling, ubiquitous user modeling, information filtering, multiagent systems architectures, software engineering, and software reuse. Among others, he has taught courses on software engineering, software quality assurance, information retrieval and artificial Intelligence. His previous work experience includes research at ITC-irst in Trento, Italy and management roles in software and technology development in private industry.