title: Experiments with hierarchical concept-based search.
abstract: Many digital libraries use hierarchical indexing schema, such as MeSH to enable concept based search in the retrieval phase. However, improving or outperforming the traditional full text search isn't trivial. We present an extensive set of experiments using a hierarchical concept based search retrieval method, applied in addition to several baselines, within the Vaidruya search and retrieval framework. Concept Based Search applied in addition to a low baseline is outperforming significantly, especially when queried on concepts in the third level and using disjunction within the hierarchical trees.
authors.affiliation: Medical Informatics Research Center, Ben Gurion University, Beer Sheva, Israel. robertmo@bgumail.bgu.ac.il
authors.forename: Robert
authors.initials: R
authors.lastname: Moskovitch
authors.forename: Roee
authors.initials: R
authors.lastname: Sa'adon
authors.forename: Eytan
authors.initials: E
authors.lastname: Behiri
authors.forename: Susana
authors.initials: S
authors.lastname: Martins
authors.forename: Aviram
authors.initials: A
authors.lastname: Weiss
authors.forename: Yuval
authors.initials: Y
authors.lastname: Shahar
mesh_terms: D000043:Abstracting and Indexing; D016247:Information Storage and Retrieval / Q000379:methods*; D046650:Medical Subject Headings; D009323:Natural Language Processing; D013358:Subject Headings; D018875:Vocabulary, Controlled