Title :
On the evaluation of LITREF: a PC-based information retrieval system to support stroke diagnosis
Author :
Wang, Guang-Nay ; Evens, Martha ; Hier, Daniel B.
Author_Institution :
Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
LITREF was developed to run on a microcomputer to support MAIESTRO, an expert system for the diagnosis and management of stroke cases. The architecture of LITREF uses an inverted file structure with a bitmap strategy. The evaluation process uses the cosine function to measure the similarity between a query and an abstract. The Salton interpolation process is used in the computation of recall and precision values. The experiment involves applying alternative suffixing algorithms to both index terms and query keywords. When the results are evaluated by comparing precision values at each recall level, it is found that the word-stem index method is superior to the full-word index method
Keywords :
expert systems; indexing; information retrieval system evaluation; medical computing; microcomputer applications; LITREF; MAIESTRO; PC-based information retrieval system; Salton interpolation process; abstract; bitmap strategy; cosine function; expert system; full-word index method; index terms; inverted file structure; microcomputer; precision values; query; query keywords; stroke diagnosis; suffixing algorithms; word-stem index method; Abstracts; Computer architecture; Diagnostic expert systems; Hospitals; Indexing; Information retrieval; Interpolation; Microcomputers; Technology management; Thesauri;
Conference_Titel :
Computer-Based Medical Systems, 1990., Proceedings of Third Annual IEEE Symposium on
Conference_Location :
Chapel Hill, NC
Print_ISBN :
0-8186-9040-2
DOI :
10.1109/CBMSYS.1990.109446
