Search (2 results, page 1 of 1)
-
×
author_ss:"Walker, S."
-
×
theme_ss:"OPAC"
-
×
theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
- Did you mean:
- precises%3a%20libraries %2f applications of microcomputer systems %2f software packages%22 2
- precises%3a%20libraries %2f applications of microcomputer systems %2f software packaged%22 2
- precises%3a%20libraries %2f applications of microcomputers systems %2f software packages%22 2
- precises%3a%20libraries %2f applications of microcomputer systems %2f software packagers%22 2
- precises%3a%20libraries %2f applications of mikrocomputer systems %2f software packages%22 2
-
Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.00
0.0020165213 = product of: 0.018148692 = sum of: 0.018148692 = weight(_text_:of in 2731) [ClassicSimilarity], result of: 0.018148692 = score(doc=2731,freq=12.0), product of: 0.061262865 = queryWeight, product of: 1.5637573 = idf(docFreq=25162, maxDocs=44218) 0.03917671 = queryNorm 0.29624295 = fieldWeight in 2731, product of: 3.4641016 = tf(freq=12.0), with freq of: 12.0 = termFreq=12.0 1.5637573 = idf(docFreq=25162, maxDocs=44218) 0.0546875 = fieldNorm(doc=2731) 0.11111111 = coord(1/9)
- Abstract
- An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility
- Source
- Journal of documentation. 48(1992) no.4, S.406-421
-
Walker, S.: Subject access in online catalogues (1991)
0.00
0.0016295954 = product of: 0.014666359 = sum of: 0.014666359 = weight(_text_:of in 5690) [ClassicSimilarity], result of: 0.014666359 = score(doc=5690,freq=6.0), product of: 0.061262865 = queryWeight, product of: 1.5637573 = idf(docFreq=25162, maxDocs=44218) 0.03917671 = queryNorm 0.23940048 = fieldWeight in 5690, product of: 2.4494898 = tf(freq=6.0), with freq of: 6.0 = termFreq=6.0 1.5637573 = idf(docFreq=25162, maxDocs=44218) 0.0625 = fieldNorm(doc=5690) 0.11111111 = coord(1/9)
- Abstract
- Discusses some of the methods of subject access to on-line catalohues (OPACs) and argues that none are entirley satisfactory. Describes 2 methods for improving subject access: best match searching; and automatic query expansion application and discusses their feasibility. Mentions emerging application standards for information retrieval and concludes that existing standards are incompatible with most methods for improving standards
- Source
- OPACs and the user: Proc. of the 3rd Anglo-Nordic seminar, Apr. 90