The Open University at TREC 2007 Enterprise Track.

Zhu, Jianhan; Song, Dawei; R�ger, Stefan

Abstract

The Multimedia and Information Systems group at the Knowledge Media Institute of the Open University participated in the Expert Search and Document Search tasks of the Enterprise Track in TREC 2007. In both the document and expert search tasks, we have studied the effect of anchor texts in addition to document contents, document authority, url length, query expansion, and relevance feedback in improving search effectiveness. In the expert search task, we have continued using a two-stage language model consisting of a document relevance and cooccurrence models. The document relevance model is equivalent to our approach in the document search task. We have used our innovative multiple-window-based cooccurrence approach. The assumption is that there are multiple levels of associations between an expert and his/her expertise. Our experimental results show that the introduction of additional features in addition to document contents has improved the retrieval effectiveness.

Citation

ZHU, J., SONG, D. and RUGER, S. 2007. The Open University at TREC 2007 Enterprise Track. In Proceedings of the 16th Text retrieval conference (TREC 2007), 5-9 November 2007, Gaithersburg, USA. National Institute of Standards and Technology (NIST) special publications, SP 500-274. Gaithersburg: NIST [online], paper number 49. Available from: https://trec.nist.gov/pubs/trec16/papers/openu.ent.final.pdf

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 16th Text retrieval conference (TREC 2007)
• Start Date: Nov 5, 2007
• End Date: Nov 9, 2007
• Acceptance Date: Feb 28, 2008
• Online Publication Date: Feb 28, 2008
• Deposit Date: May 26, 2009
• Publicly Available Date: May 26, 2009
• Publisher: NIST National Institute of Standards and Technology
• Peer Reviewed: Peer Reviewed
• Article Number: 49
• Series Title: National Institute of Standards and Technology (NIST) special publications
• Series Number: SP 500-274
• Keywords: Expert search
• Public URL: http://hdl.handle.net/10059/346
• Publisher URL: http://trec.nist.gov/pubs/trec16/papers/openu.ent.final.pdf
• Contract Date: May 26, 2009