Welcome to ICDE'07 Istanbul, Turkey 2007 IEEE 23rd International Conference on Data Engineering
(ICDE 2007)
April 15-20, 2007
The Marmara Hotel, Istanbul, Turkey
Sponsored by the IEEE Computer Society
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Keynote Speeches

Keynote Talk 1

Emerging Open Agoras of Data and Information

Yannis Ioannidis
National University of Athens, Greece

Session Chair: Asuman Dogac, Middle East Technical University, Turkey
Abstract
People's needs for information are often fulfilled through interactions with various kinds of systems that manage content of well known origin and produce deterministic results. These systems allow users to specify or identify the information of their interest quite accurately and provide results that are of certified quality and invariant to the particular user asking for them. In some sense, these systems represent closed worlds of information, where certain desirable characteristics are guaranteed. When searching for material goods in everyday life, however, people's behavior and experiences are very different, as they operate in the open world of commerce. They shop around, try to identify the best choices, make tradeoffs between various characteristics of what they want to find, negotiate with the merchants or owners of the goods, and sometimes proceed with purchases even if they are uncertain of the origin or quality of what they buy. Furthermore, the entire process may follow dramatically different paths for different people, affected by personal styles of shopping, different preferences on the kinds of goods sought and their characteristics, and even by the particular moods of the people at the time, their location, or their reasons for pursuing particular items. There is an emerging need to establish `Open Agoras' of information, i.e., distributed environments of independent information systems, where seeking for information will be similar to real-life searching for material goods. Interaction with these systems may occur in several unconventional modalities, user behavior may be personalized and context-dependent, system reaction may be unpredictable, and the information produced as a result may also be personalized and context-dependent, as well as negotiable and of uncertain origin or quality. This talk explores such Open Agoras of information, identifies some technical challenges that they raise, and presents some thoughts on how to address them.

Short Bio

Yannis Ioannidis is currently a Professor at the Department of Informatics and Telecommunications of the University of Athens. He received his Diploma in Electrical Engineering from the National Technical University of Athens in 1982, his MSc in Applied Mathematics from Harvard University, and his Ph.D. degree in Computer Science from the University of California at Berkeley in 1986. Immediately after that he joined the faculty of the Computer Sciences Department of the University of Wisconsin at Madison, where he became a Professor before finally leaving in 1999. His research interests include database and information systems, digital libraries, personalization, scientific systems and workflows, eHealth systems, and human-computer interaction, topics on which he has published over seventy articles in leading journals and conferences. He also holds three patents.
Yannis is an ACM Fellow (2004) and a recipient of the VLDB "10-Year Best Paper Award" (2003), the "Presidential Young Investigator Award" - PYI (1991), and of several awards for teaching excellence, including the nation-wide "Xanthopoulos-Pneumatikos Award for Excellence in Academic Teaching" in Greece (2006) and the "Chancellor's Award for Excellence in Teaching" at the University of Wisconsin (1996). He has also been a keynote or invited speaker in several conferences (ICDE'07, ADBIS'06, CIKM'05, ICDT'03, WAIM'01, SSDBM'00, PDP'00, ECDL'98).
Yannis has been a (co-)principal investigator in over thirty research projects funded by various government agencies (USA, Europe, Greece) or private industry. He is currently an Associate Editor of five journals (Information Systems, Journal of Digital Libraries, Journal of Intelligent Information Systems, Journal of Digital Curation, and the electronic ACM Digital Symposium Collection) and has been a member of the program committees of over sixty conferences, six times as (co-)chair (ADBIS'07, EDBT'06, HDMS'03, VLDB'02, VDB'98, and SSDBM'97).
Yannis currently serves as the ACM Sigmod Vice-Chair (since July 2005) and is a member of the Scientific Advisory Board of the Max Planck Institute for Informatics. He has also served on the review board of the Lawrence Berkeley Laboratories in Berkeley and on the Science Council of the (now defunct) CESDIS Center for Excellence in Space Data and Information Sciences. Finally, between July 2002 and March 2004 he served as the Information Technology advisor to the Minister of Health of Greece.

Keynote Talk 2

Challenges in Distributed Web Retrieval

Ricardo Baeza-Yates
Director of Yahoo! Research Barcelona, Spain and Yahoo! Research Latin America at Santiago, Chile

Session Chair: M. Tamer Özsu, University of Waterloo, Canada
Abstract
In the ocean of Web data, Web search engines are the main form of accessing content. As the data is on the order of petabytes, current search engines are very large centralized systems based in replicated clusters. However, the number of Web sites is still growing fast and the number of indexed pages is over 20 billion. Hence, in the near future a centralized system may become too expensive and less effective than a truly distributed search engine. This ideal search engine needs to achieve the following goals: answers of good quality, fast response time, high query throughput, and scalability. In this talk we survey and organize recent research results, outlining the main challenges behind a distributed Web retrieval system that fulfills these goals.

Short Bio
Ricardo Baeza-Yates received the bachelor degree in CS in 1983 from the University of Chile. Later, he received also the M.Sc. in CS (1985), the professional title in electrical engineering (1985) and the M.Eng. in i EE (1986) from the same university. He received his Ph.D. in CS from the U. of Waterloo, Canada, in 1989. In 1992 he was elected president of the Chilean Computer Science Society (SCCC) until 1995, being elected again in 1997. During 1993, he received the Organization of American States award for young researchers in exact sciences. In 1997 with two Brazilian colleagues obtained the COMPAQ prize to best Brazilian research article in CS. During 2002-2004 he was member of the Board of Governors of the IEEE Computer Society. In 2003 he was incorporated to the Chilean Academy of Sciences, being the first computer scientist to achieve this position.
Currently he is director of Yahoo! Research Barcelona and Yahoo! Research Latinamerica in Santiago, Chile. During 2005 he was an ICREA Professor at Universitat Pompeu Fabra in Barcelona. He also was a professor and director of the Center for Web Research, that he founded in 2002, at the CS department of the University of Chile, where he was the chairperson in the period 1993-5 and 2003-4. His research interests include information retrieval, algorithms, and information visualization. He is co-author of the book Modern Information Retrieval, published in 1999 by Addison-Wesley, as well as co-author of the 2nd edition of the Handbook of Algorithms and Data Structures, Addison-Wesley, 1991; and co-editor of Information Retrieval: Algorithms and Data Structures, Prentice-Hall, 1992, between other publications in journals published by ACM, IEEE or SIAM. He has been visiting professor or invited speaker at several conferences and universities all around the world, as well as referee of several journals, conferences, NSF, etc. He is member of the ACM, EATCS, IEEE, SCCC and SIAM.

Keynote Talk 3

Information for People

Laura M. Haas
Distinguished Engineer and Director of Computer Science, IBM Almaden Lab

Session Chair: Timos Sellis, National Technical University of Athens, Greece
Abstract

Ordinary people have access to unprecedented volumes of information today. Researchers in the fields of information management (IM) and human-computer interaction (HCI) are reacting to this challenge from their own unique perspectives. For example, we are now carrying multiple devices -- organizer, cell phone, even MP3 player -- full of information. An IM person might ask how we can integrate information across these devices so the user can find what they are looking for quickly, while an HCI researcher might focus on how the combination of devices can enable the user to do more than a single device, or whether the various interfaces are confusing to the user. Of course, users need both to know and to do. It wasn't long ago that the amount of information reachable from a typical personal computer was measured in megabytes, and access to any significant volume of data was mediated by a high priest called a database administrator. Today's user carries gigabytes on her person as a matter of course, expects to access the entire corporate directory from her cell phone, and routinely searches terabyte repositories. Quality and provenance of data matters: who wrote it, when it was last updated, how many people concur. Having access to a billion records is cool, but having access to a billion people is awesome. How are the IM and HCI communities reacting? In this talk, we look at recent research from both communities in this space, and speculate on how interactions between the communities could enhance the user experience of information.

Joint work with Steve B. Cousins.


Short Bio

Laura Haas is an IBM Distinguished Engineer and Director of Computer Science at Almaden Research Center, where she leads a team of over one hundred researchers studying user-focused systems, health informatics, computer science fundamentals, and information management. Most recently, she was responsible for Information Integration Solutions (IIS) architecture and development in IBM's Software Group. Dr. Haas was one of the founders of Information Integration Solutions, which today includes products that integrate both structured and unstructured data via federation, consolidation and transformation, and search. Dr. Haas joined the development team in 2001 as manager of DB2 UDB Query Compiler development. Previously, Dr. Haas was a research staff member and manager at IBM's Almaden Research Center. In Research, she worked on and managed a number of exploratory projects in distributed database systems. She is best known for her work on the Starburst query processor (from which DB2 UDB was developed), on Garlic, a system which allowed federation of heterogeneous data sources, and on Clio, the first semi-automatic tool for heterogeneous schema mapping. Garlic technology married with DB2 UDB query processing is the basis for IBM WebSphere Information Server's federation capabilities, while Clio capabilities are a core differentiator for the new IBM Rational Data Architect. Dr. Haas is an active member of the database community, serving as vice chair of ACM SIGMOD from 1989-1997, and, currently, as Vice President of the VLDB Board of Trustees, as well as on many program committees for technical conferences. She has received several IBM awards for Outstanding Technical Achievement, and an IBM Corporate Award for her work on federated database technology. She is a member of the IBM Academy of Technology and a new ACM Fellow.

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