[Colloquium] TTI-C Talks Next Week: Chen, Altun, Zhou, Sharon (4/11-4/15)

[Katherine Cumming]

TOYOTA TECHNOLOGICAL INSTITUTE TALKS
 
 
Guest Speaker (1)
 
Speaker:  Yi Chen, University of Pennsylvania
Speaker's homepage:  http://www.cis.upenn.edu/~yicn/
 
Time:  Monday, April 11th @ 3:00 pm
Location:  TTI-C Conference Room 
Title: Managing XML Data Effectively in Relational Databases
Abstract:
XML has become a standard data representation format in various
applications, from bioinformatics, healthcare and astronomy, to finance,
legislative documents and government data. With the large amount of data
now being represented in XML, the question is raised of how to
effectively store, index, and access it to retrieve information. Since
relational databases have matured through more than 30 years of
development, it is natural to investigate whether this technology can be
leveraged to manage XML data.

In this talk, I present techniques for storing and querying XML data
using relational databases in different scenarios. When the schema of
XML data is not available, a generic storage mapping to relational
databases is proposed. Based on a novel bi-labeling scheme, an XML query
is translated to an SQL query. Compared with previous work, the
generated SQL query contains fewer joins and requires fewer disk
accesses to execute. When a schema is available, structural and semantic
constraint information of an XML document is used to guide the mapping
design. In contrast with previous work that only considers structural
information, the proposed mapping reduces the redundancy of the XML data
in its relational storage and enables efficient validation of data
correctness with respect to constraints. 

Yi Chen is a Ph.D. candidate in the Department of Computer and
Information Science at the University of Pennsylvania, under the
supervision of Professor Susan Davidson. She received her M.S. in
Computer and Information Science from the University of Pennsylvania in
2000 and her B.S. in Computer Science from Central South University,
China in 1999. She also worked as a research intern at the IBM Watson
Research Center in the summer of 2003 and 2002. Her research interests
include database systems, web data and scientific data management, data
models and languages, query processing and optimization techniques for
databases and streams. 
 
 
Show and Tell Series (2)
 
Speaker:  Yasemin Altun, TTI-C
Speaker's homepage:  http://www.tti-c.org//altun.html
<http://www.tti-c.org/altun.html> 
 
Time:  Tuesday, April 12th @ 12:15pm (lunch provided)
Location:  TTI-C Conference Room 
 
Title:  TBA
 
Abstract:  TBA
 
 
 
Learning Theory Program (3)
 
Speaker:   <http://www6.cityu.edu.hk/ma/people/dxzhou.html> Ding-Xuan
Zhou, City University of Hong Kong
Speaker's homepage:  http://www6.cityu.edu.hk/ma/people/dxzhou.html
 
Time:  Wednesday, April 13th @ 3:00pm
Location:  TTI-C Conference Room 
Title:  Analysis of Learning Algorithms: Regression and Classification
Abstract:
Learning theory studies learning function relations from samples. In
this talk we shall discuss some learning algorithms for regression and
classification: from the classical method of empirical risk minimization
to regularization schemes with reproducing kernel Hilbert spaces. Some
error bounds for the least-square regression and support vector machine
classification will be presented. 
 
 
Guest Speaker (4)
Speaker:  Eitan Sharon, Weizmann Institute of Science, Rehovot, Israel.
Speaker's homepage:  www.dam.brown.edu/people/eitans
Time:  Thursday, April 14th @ 3:00pm
Location:  TTI-C Conference Room
Title:  TBA
Abstract:  TBA
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If you have questions, or would like to meet the speaker, please contact
Katherine at 773-834-1994 or kcumming at tti-c.org.   For information on
future TTI-C talks and events, please go to the TTI-C Events page:
http://www.tti-c.org/events.html.  TTI-C (1427 East 60th Street,
Chicago, IL  60637)
 
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