Biomedical subjects

T J Leone

Publications and source records attributed to T J Leone.

2 recordsLinked to original sources

PubMed1995

The SAPHIRE server: a new algorithm and implementation.

SAPHIRE is an experimental information retrieval system implemented to test new approaches to automated indexing and retrieval of medical documents. Due to limitations in its original concept-matching algorithm, a modified algorithm has been implemented which allows greater flexibility in partial matching and different word order within concepts. With the concomitant growth in client-server applications and the Internet in general, the new algorithm has been implemented as a server that can be accessed via other applications on the Internet.

Abstracting and Indexing↗

PubMed1992

Words, concepts, or both: optimal indexing units for automated information retrieval.

What is the best way to represent the content of documents in an information retrieval system? This study compares the retrieval effectiveness of five different methods for automated (machine-assigned) indexing using three test collections. The consistently best methods are those that use indexing based on the words that occur in the available text of each document. Methods used to map text into concepts from a controlled vocabulary showed no advantage over the word-based methods. This study also looked at an approach to relevance feedback which showed benefit for both word-based and concept-based methods.

Abstracting and Indexing↗