DCU and ISI@INEX 2010: Adhoc and Data-Centric Tracks

• Published in: Comparative Evaluation of Focused Retrieval pp. 182 - 193
• Main Authors: Ganguly, Debasis, Leveling, Johannes, Jones, Gareth J. F., Palchowdhury, Sauparna, Pal, Sukomal, Mitra, Mandar
• Format: Book Chapter
• Language: English
• Published: Berlin, Heidelberg Springer Berlin Heidelberg
• Series: Lecture Notes in Computer Science
• Subjects: Article Level; Good Retrieval Result; Language Modeling Approach; Query Expansion; Query Term
• ISBN: 9783642235764; 364223576X
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-642-23577-1_16

We describe the participation of Dublin City University (DCU) and Indian Statistical Institute (ISI) in INEX 2010 for the Adhoc and Data Centric tracks. The main contributions of this paper are: i) a simplified version of Hierarchical Language Model (HLM), which involves scoring XML elements with a combined probability of generating the given query from itself and the top level articl node, is shown to outperform the baselines of LM and VSM scoring of XML elements; ii) the Expectation Maximization (EM) feedback in LM is shown to be the most effective on the domain specific collection of IMDB; iii) automated removal of sentences indicating aspects of irrelevance from the narratives of INEX ad hoc topics is shown to improve retrieval effectiveness.