Intelligent Techniques for Web Personalization Papers from the AAAI Workshop Technical Report WS-06-10 AAAI Press American Association for Artificial Intelligence AAAI Press 445 Burgess Drive Menlo Park, California 94025 ISBN 978-1-57735-292-1 WS-06-10 Intelligent Techniques for Web Personalization Papers from the AAAI Workshop Bamshad Mobasher and Sarabjot Singh Anand, Cochairs Technical Report WS-06-10 AAAI Press Menlo Park, California Copyright © 2006, AAAI Press The American Association for Artificial Intelligence 445 Burgess Drive Menlo Park, California 94025 USA AAAI maintains compilation copyright for this technical report and retains the right of first refusal to any publication (including electronic distribution) arising from this AAAI event. Please do not make any inquiries or arrangements for hardcopy or electronic publication of all or part of the papers contained in these working notes without first exploring the options available through AAAI Press and AI Magazine (concurrent submission to AAAI and an another publisher is not acceptable). A signed release of this right by AAAI is required before publication by a third party. Distribution of this technical report by any means including electronic (including, but not limited to the posting of the papers on any Website) without permission is prohibited. ISBN 978-1-57735-292-1 WS-06-10 Manufactured in the United States of America Organizing Committee Bamshad Mobasher School of Computer Science, Telecommunication, and Information Systems, DePaul University, 243 S. Wabash Ave. Chicago, IL, 60604, USA mobasher@cs.depaul.edu Sarabjot Singh Anand Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK S.S.Anand@warwick.ac.uk Program Committee Liliana Ardissono, University of Torino, Italy Bettina Berendt, Humbolt University, Germany Robin Burke, DePaul University, USA Rayid Ghani, Accenture, USA Nicola Henze, University of Hannover, Germany Andreas Hotho, University of Karlsruhe, Germany Joseph Konstan, University of Minnesota, USA Mark Levene, University College, London, UK Jiming Liu, Hong Kong Baptist University, Hong Kong Stuart E. Middleton, University of Southampton Dunja Mladenic, Josef Stefan Institute, Slovenia Maurice Mulvenna, NIKEL, Faculty of Informatics, University of Ulster, Northern Ire land, UK Alexandros Nanopulos, Aristotle University of Thessaloniki, Greece Olfa Nasraoui, University of Memphis, USA Claire Nedellec, Université Paris Sud, Paris, France George Paliouras, Demokritos National Centre for Scientific Research, Athens, Greece David Pennock, Yahoo! Research, USA Enric Plaza, Institut d'Investigació en Intel.ligència Artificial, Catalonia (Spain) Naren Ramakrishnan, Virginia Tech, USA Francesco Ricci, ITC-irst, Italy Lars Schmidt-Thieme, University of Freiburg, Germany Spiros Sirmakessis, University of Patras, Greece Barry Smyth, University College Dublin, Ireland Myra Spiliopoulou, Otto-von-Guericke University, Germany Alex Tuzhilin, Stern School of Business, New York University, USA Suk-Chung Yoon, Widener University, USA Cai Nicholas Ziegler, Siemens AG This AAAI–06 Workshop was held July 16, 2006, in Boston, Massachusetts USA iii Contents Scalable Collaborative Filtering Based on Latent Semantic Indexing / 1 Panagiotis Symeonidis, Alexandros Nanopoulos, Apostolos Papadopoulos, and Yannis Manolopoulos Cross System Personalization by Factor Analysis / 10 Bhaskar Mehta, Thomas Hofmann, and Peter Fankhauser The Necessary but Not Sufficient Role of Ontologies in Applications Requiring Personalized Content Filtering / 19 Santtu Toivonen and Oriana Riva Improving Reranking of Search Results using Collaborative Filtering / 31 Rohini Uppuluri and Vamshi Ambati Applying Collaborative Filtering Techniques to the Movie Search for Better Ranking and Browsing / 38 Seung-Taek Park, David M. Pennock, and Dennis DeCoste Securing Collaborative Filtering against Malicious Attacks through Anomaly Detection / 50 Runa Bhaumik, Chad Williams, Bamshad Mobasher, and Robin Burke v