G-Bean: An ontology-graph based web tool for biomedical literature retrieval

To address the need for an efficient and effective biomedical information retrieval system, this paper presents an ontology-graph based web tool, G-Bean (graph based biomedical search engine), for searching biomedical documents from the MEDLINE database. This search engine uses an ontology-graph based query expansion technique to expand the initial query with additional query terms and/or more specific query concepts, resulting in the retrieval of more accurate and relevant information from the database. A multithreading parallel process is used to automatically generate the document index to address the inefficiency of the PubMed´s manual indexing process. This search engine can also discover user´s true search intention and retrieve additional relevant articles based on articles that he/she has already shown interest in.