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.