Invited Speakers

Magdalini Eirinaki and Michalis Vazirgiannis
Athens University of Economics & Business, Athens, Greece:

Introducing Semantics in Web Personalization - The role of ontologies

Abstract:

Web personalization is the process of customizing a web site to the needs of individuals or groups of users. Personalization of a web site is performed by means of providing recommendations to the users, highlighting/adding links, creation of index pages, etc. Most of the research efforts in Web personalization capitalize on the results of Web usage mining, i.e. the extraction of navigational patterns from web logs. Purely usage-based personalization however, ignore the important aspect of web pagesí semantics and thus valuable contnet, conceptually related to what is finally recommended, may be missed. The underlying idea is to integrate usage data with content semantics, expressed in ontology terms, in order to produce semantically enhanced navigational patterns that can subsequently be used for producing valuable recommendations. In this talk we will present the added value of integrating semantics in the personalization process. We especially address the challenge optimally mapping content to sets of ontology terms. We tackle these issues with advanced text/link mining techniques and similarity measures based on WSD exploiting the kernel based compactness measures.


Presenters' Short Biographies:

Magdalini Eirinaki is currently a senior PhD candidate in the Department of Informatics of Athens University of Economics and Business (since 2002). She holds a degree in Informatics from the University of Piraeus (1998), and an MSc degree (with Distinction) in Advanced Computing from the Imperial College of Science, Technology and Medicine, University of London (2000). Her interests cover the Web mining and Web personalization areas. Her research work focuses on the integration of Web usage and content semantics, as well as the involvement of link analysis techniques in the Web personalization process. She has served as a reviewer in international conferences and journals and has published several papers in international refereed journals, conferences and workshops. She has also contributed a chapter in an international book.

Michalis Vazirgiannis is an Associate Professor in the Department of Informatics of Athens Univ. of Economics & Business. He holds a degree in Physics (1986), a MSc. in Robotics (1988), and a MSc. In Knowledge Based Systems. In 1994 he obtained a Ph.D. degree in Informatics. Since then, he has conducted research in the Knowledge & DB Lab (of N.T.U. Athens, Greece), in GMD-IPSI (Darmstadt, Germany), in Fern-Universitaet (Hagen, Germany), in project VERSO in INRIA/Paris, in IBM India Research Laboratory, and in Max Planck Institut für Informatik (Germany). His research interests and work range from data mining, to web content management, spatiotemporal databases, and global computing. He has been awarded the ERCIM post doctoral fellowship in the year 2001. In February 2005 he received the MARIE CURIE intra European fellowship to visit INRIA - Paris. The fellowship supports research in the area of P2P web indexing and searching. He is currently the scientific person in charge of two EU funded competitive research programs and several national ones. He served as a conference committee member and as reviewer for international conferences and journals. He has published two books with Springer-Verlag, contributed chapters in international books and encyclopaedias and more than sixty articles in international journals and conference proceedings.