Biomedical subjects

V Kouramajian

Publications and source records attributed to V Kouramajian.

3 recordsLinked to original sources

PubMed1995

Categorization by reference: a novel approach to MeSH term assignment.

Categorization by Reference is a novel text classification technique that examines the existing classifications of the citations found in an as-yet unclassified text to determine what terms should be assigned to that text. The existence of the Medical Subject Headings and MEDLINE make the biomedical domain a prime candidate for application of this technique. We describe our approach and implementation of a prototype, presenting some results of our initial tests. We further discuss refinements that could improve the precision of the technique, and describe its possible use in categorizing portions of the World-Wide Web.

Abstracting and Indexing↗

PubMed1995

Automated MeSH indexing of the World-Wide Web.

To facilitate networked discovery and information retrieval in the biomedical domain, we have designed a system for automatic assignment of Medical Subject Headings to documents retrieved from the World-Wide Web. Our prototype implementations show significant promise. We describe our methods and discuss the further development of a completely automated indexing tool called the "Web-MeSH Medibot."

Abstracting and Indexing↗

PubMed1994

Modeling past, current, and future time in medical databases.

Recent research has focused on increasing the power of medical information systems by incorporating time into the database system. A problem with much of this research is that it fails to differentiate between historical time and future time. The concept of bitemporal lifespan presented in this paper overcomes this deficiency. Bitemporal lifespan supports the concepts of valid time and transaction time and allows the integration of past, current, and future information in a unified model. The concept of bitemporal lifespan is presented within the framework of the Extended Entity-Relationship model. This model permits the characterization of temporal properties of entities, relationships, and attributes. Bitemporal constraints are defined that must hold between entities forming "isa" hierarchies and between entities and relationships. Finally, bitemporal extensions are presented for database query languages in order to provide natural high-level operators for bitemporal query expressions.

Information Systems↗