***Note Special Date and Time***

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                               Joint Seminar


       Department of Systems Engineering and Engineering Management

                                   and

               Department of Computer Science and Engineering

                    The Chinese University of Hong Kong

Title:
Finding Patterns of Contradictory Data

Speaker:
Professor Johann-Christoph Freytag
Humboldt-Universitaet zu Berlin
Germany

Date : June 14, 2006 (Wednesday)

Time : 11:00 a.m. - 12:00 p.m.

Venue : Room 513, William M.W. Mong Engineering Building

(Engineering Building Complex Phase 2), CUHK

Abstract:
During data integration users are often faced with differences in the data
that come from different sources. To find those differences during data
integration and to resolve them efficiently is a major issue.

In this talk I address the problem of how to derive/generate "contradiction
patterns" automatically using existing techniques from data mining. Those
patterns potentially provide hints and suggestions to the "domain expert"
where (and why) differences in the data exist (with what kind of
"significance") - it's then up to him/her to decide if those difference are
"real" and how to resolve them thus generating integrated data sources without
contradictions.

Bio:
Johann-Christoph Freytag is currently full professor for databases and
information systems at the Computer Science Department of the Humboldt-
Universitaet zu Berlin, Germany. Before joining the department in 1994 he was
a research staff member at the IBM Almaden Research Center (1985-1987), a
researcher at the European Computer-Industry-Research Centre (ECRC, Munich,
Germany, 1987-1989), and the head of Digital's Database Technology Center
(also in Munich, 1990-1993). He holds a Ph.D. in Applied Mathematics/Com­puter
Science from Harvard University, MA. Dr. Freytag's research interests include
all aspects of query processing and query optimization in object-relational
database systems, new developments in the database area (such as semi-
structured data, data quality, databases and security), privacy in database
systems, and applying database technology to applications such as GIS,
genomics, and bioinformatics/life science. During last years he received the
IBM Faculty Award 4 times for collaborative work in the areas of databases,
middleware, and bioinformatics/life science. Currently, he is a member of the
VLDB Endowment and the head of the German database interest group of the
German Computer Society GI (Gesellschaft für Informatik). For more information
please visit his web site http://www.dbis.informatik.hu-berlin.de/~freytag/.

Note : Cookies and drinks will be available at 10:45 pm.

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