Abstract #302321

This is the preliminary program for the 2003 Joint Statistical Meetings in San Francisco, California. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 2-5, 2003); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

To View the Program:
You may choose to view all activities of the program or just parts of it at any one time. All activities are arranged by date and time.

The views expressed here are those of the individual authors
and not necessarily those of the ASA or its board, officers, or staff.

Back to main JSM 2003 Program page
JSM 2003 Abstract #302321
Activity Number: 208
Type: Contributed
Date/Time: Tuesday, August 5, 2003 : 8:30 AM to 10:20 AM
Sponsor: Section on Statistical Computing
Abstract - #302321
Title: Document Classification: Topic Spotting Using Geodesics
Author(s): Christian Posse*+ and Igor Perisic
Companies: Pacific Northwest National Laboratory and Entopia
Address: 2258 Morency Dr., Richland, WA, 99352-9517,
Keywords:
Abstract:

In information retrieval, Latent Semantic Indexing (LSI) satisfactorily addresses the problems of synonymy and polysemy. However, when it comes to topic spotting (i.e., identifying which of a set of predefined topics are present in a document) the classification performance of global LSI worsens as topic frequency decreases. This is due to the fact that infrequent topics are usually indicated by infrequent terms that are likely to be discarded by the LSI representation. On the other hand, topic-based LSI's are quite unreliable due to the generally small amount of available information for each topic. We propose a geometric approach that relies on geodesics to efficiently combine the best of both LSI worlds (local and global).

  • The address information is for the authors that have a + after their name.
  • Authors who are presenting talks have a * after their name.

Back to the full JSM 2003 program

JSM 2003 For information, contact meetings@amstat.org or phone (703) 684-1221. If you have questions about the Continuing Education program, please contact the Education Department.
Revised March 2003