-
Sanderson, M.: ¬The Reuters test collection (1996)
0.15
0.14501782 = product of:
0.21752672 = sum of:
0.19115403 = weight(_text_:specialist in 6971) [ClassicSimilarity], result of:
0.19115403 = score(doc=6971,freq=2.0), product of:
0.32440975 = queryWeight, product of:
6.666449 = idf(docFreq=152, maxDocs=44218)
0.04866305 = queryNorm
0.5892364 = fieldWeight in 6971, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.666449 = idf(docFreq=152, maxDocs=44218)
0.0625 = fieldNorm(doc=6971)
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
0.052745372 = score(doc=6971,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 6971, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=6971)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983)
0.13
0.1268906 = product of:
0.19033588 = sum of:
0.16725978 = weight(_text_:specialist in 5001) [ClassicSimilarity], result of:
0.16725978 = score(doc=5001,freq=2.0), product of:
0.32440975 = queryWeight, product of:
6.666449 = idf(docFreq=152, maxDocs=44218)
0.04866305 = queryNorm
0.51558185 = fieldWeight in 5001, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.666449 = idf(docFreq=152, maxDocs=44218)
0.0546875 = fieldNorm(doc=5001)
0.0230761 = product of:
0.0461522 = sum of:
0.0461522 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
0.0461522 = score(doc=5001,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.2708308 = fieldWeight in 5001, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=5001)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- A study was done to test the effectiveness of retrieval using title word searching. It was based on actual search profiles used in the Mechanized Information Center at Ohio State University, in order ro replicate as closely as possible actual searching conditions. Fewer than 50% of the relevant titles were retrieved by keywords in titles. The low rate of retrieval can be attributes to three sources: titles themselves, user and information specialist ignorance of the subject vocabulary in use, and to general language problems. Across fields it was found that the social sciences had the best retrieval rate, with science having the next best, and arts and humanities the lowest. Ways to enhance and supplement keyword in title searching on the computer and in printed indexes are discussed.
- Date
- 14. 3.1996 13:22:21
-
Crestani, F.; Rijsbergen, C.J. van: Information retrieval by imaging (1996)
0.11
0.10876336 = product of:
0.16314504 = sum of:
0.14336552 = weight(_text_:specialist in 6967) [ClassicSimilarity], result of:
0.14336552 = score(doc=6967,freq=2.0), product of:
0.32440975 = queryWeight, product of:
6.666449 = idf(docFreq=152, maxDocs=44218)
0.04866305 = queryNorm
0.44192728 = fieldWeight in 6967, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.666449 = idf(docFreq=152, maxDocs=44218)
0.046875 = fieldNorm(doc=6967)
0.019779515 = product of:
0.03955903 = sum of:
0.03955903 = weight(_text_:22 in 6967) [ClassicSimilarity], result of:
0.03955903 = score(doc=6967,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.23214069 = fieldWeight in 6967, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=6967)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Smeaton, A.F.; Harman, D.: ¬The TREC experiments and their impact on Europe (1997)
0.06
0.06371801 = product of:
0.19115403 = sum of:
0.19115403 = weight(_text_:specialist in 7702) [ClassicSimilarity], result of:
0.19115403 = score(doc=7702,freq=2.0), product of:
0.32440975 = queryWeight, product of:
6.666449 = idf(docFreq=152, maxDocs=44218)
0.04866305 = queryNorm
0.5892364 = fieldWeight in 7702, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.666449 = idf(docFreq=152, maxDocs=44218)
0.0625 = fieldNorm(doc=7702)
0.33333334 = coord(1/3)
- Abstract
- Reviews the overall results of the TREC experiments in information retrieval, which differed from other information retrieval research projects in that the document collections used in the research were massive, and the groups participating in the collaborative evaluation are among the main organizations in the field. Reviews the findings of TREC, the way in which it operates and the specialist 'tracks' it supports and concentrates on european involvement in TREC, examining the participants and the emergence of European TREC like exercises
-
Aldous, K.J.: ¬A system for the automatic retrieval of information from a specialist database (1996)
0.05
0.04778851 = product of:
0.14336552 = sum of:
0.14336552 = weight(_text_:specialist in 4078) [ClassicSimilarity], result of:
0.14336552 = score(doc=4078,freq=2.0), product of:
0.32440975 = queryWeight, product of:
6.666449 = idf(docFreq=152, maxDocs=44218)
0.04866305 = queryNorm
0.44192728 = fieldWeight in 4078, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.666449 = idf(docFreq=152, maxDocs=44218)
0.046875 = fieldNorm(doc=4078)
0.33333334 = coord(1/3)
-
Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984)
0.02
0.015384067 = product of:
0.0461522 = sum of:
0.0461522 = product of:
0.0923044 = sum of:
0.0923044 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
0.0923044 = score(doc=262,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.5416616 = fieldWeight in 262, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=262)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 20.10.2000 12:22:23
-
Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998)
0.02
0.015384067 = product of:
0.0461522 = sum of:
0.0461522 = product of:
0.0923044 = sum of:
0.0923044 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
0.0923044 = score(doc=6418,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.5416616 = fieldWeight in 6418, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6418)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Online. 22(1998) no.6, S.57-58
-
Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000)
0.02
0.015384067 = product of:
0.0461522 = sum of:
0.0461522 = product of:
0.0923044 = sum of:
0.0923044 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
0.0923044 = score(doc=6438,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.5416616 = fieldWeight in 6438, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6438)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 11. 8.2001 16:22:19
-
Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990)
0.02
0.015384067 = product of:
0.0461522 = sum of:
0.0461522 = product of:
0.0923044 = sum of:
0.0923044 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
0.0923044 = score(doc=5089,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.5416616 = fieldWeight in 5089, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=5089)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 7.2006 18:43:54
-
Voorbij, H.: Title keywords and subject descriptors : a comparison of subject search entries of books in the humanities and social sciences (1998)
0.01
0.0127141215 = product of:
0.038142364 = sum of:
0.038142364 = product of:
0.07628473 = sum of:
0.07628473 = weight(_text_:librarians in 4721) [ClassicSimilarity], result of:
0.07628473 = score(doc=4721,freq=4.0), product of:
0.21798341 = queryWeight, product of:
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.04866305 = queryNorm
0.34995657 = fieldWeight in 4721, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.0390625 = fieldNorm(doc=4721)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- In order to compare the value of subject descriptors and title keywords as entries to subject searches, two studies were carried out. Both studies concentrated on monographs in the humanities and social sciences, held by the online public access catalogue of the National Library of the Netherlands. In the first study, a comparison was made by subject librarians between the subject descriptors and the title keywords of 475 records. They could express their opinion on a scale from 1 (descriptor is exactly or almost the same as word in title) to 7 (descriptor does not appear in title at all). It was concluded that 37 per cent of the records are considerably enhanced by a subject descriptor, and 49 per cent slightly or considerably enhanced. In the second study, subject librarians performed subject searches using title keywords and subject descriptors on the same topic. The relative recall amounted to 48 per cent and 86 per cent respectively. Failure analysis revealed the reasons why so many records that were found by subject descriptors were not found by title keywords. First, although completely meaningless titles hardly ever appear, the title of a publication does not always offer sufficient clues for title keyword searching. In those cases, descriptors may enhance the record of a publication. A second and even more important task of subject descriptors is controlling the vocabulary. Many relevant titles cannot be retrieved by title keyword searching because of the wide diversity of ways of expressing a topic. Descriptors take away the burden of vocabulary control from the user.
-
Lancaster, F.W.; Connell, T.H.; Bishop, N.; McCowan, S.: Identifying barriers to effective subject access in library catalogs (1991)
0.01
0.012586337 = product of:
0.03775901 = sum of:
0.03775901 = product of:
0.07551802 = sum of:
0.07551802 = weight(_text_:librarians in 2259) [ClassicSimilarity], result of:
0.07551802 = score(doc=2259,freq=2.0), product of:
0.21798341 = queryWeight, product of:
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.04866305 = queryNorm
0.3464393 = fieldWeight in 2259, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.0546875 = fieldNorm(doc=2259)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- 51 subject searches were performed in an online catalog containing about 4,5 million records. Their success was judges in terms of lists of items, known to be relevant to the various topics, compiled by subject specialists (faculty members or authors of articles in specialized encyclopedias). Many of the items known to be relevant were not retrieved, even in very broad searches that sometimes retrieved several hundred records, and very little could be done to make them retrievable within the constraints of present cataloging practice. Librarians should recognize that library catalogs, as now implemented, offer only the most primitive of subject access and should seek to develop different types of subject access tools. - Vgl auch Letter (B.H. Weinberg) in: LTRS 36(1992) S.123-124.
-
Nicholas, D.: Are information professionals really better online searchers than end-users? : (and whose story do you believe?) (1995)
0.01
0.012586337 = product of:
0.03775901 = sum of:
0.03775901 = product of:
0.07551802 = sum of:
0.07551802 = weight(_text_:librarians in 3871) [ClassicSimilarity], result of:
0.07551802 = score(doc=3871,freq=2.0), product of:
0.21798341 = queryWeight, product of:
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.04866305 = queryNorm
0.3464393 = fieldWeight in 3871, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.479444 = idf(docFreq=1362, maxDocs=44218)
0.0546875 = fieldNorm(doc=3871)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Examines the searching behaviour of Guardian journalists searching FT PROFILE online system. Using transactional log analysis compares the searching styles of journalists with those of Guardian librarians. In some respects end users conform to the picture that professionals have of them - they search with a very limited range of commands - but in other respects they confound that image - they are very quick and economical searchers. Their behaviour relates to their general information seeking behaviour, and their searching styles would be seen in this regard
-
Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997)
0.01
0.010988619 = product of:
0.032965858 = sum of:
0.032965858 = product of:
0.065931715 = sum of:
0.065931715 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
0.065931715 = score(doc=3103,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.38690117 = fieldWeight in 3103, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3103)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 27. 2.1999 20:55:22
-
Ng, K.B.; Loewenstern, D.; Basu, C.; Hirsh, H.; Kantor, P.B.: Data fusion of machine-learning methods for the TREC5 routing tak (and other work) (1997)
0.01
0.010988619 = product of:
0.032965858 = sum of:
0.032965858 = product of:
0.065931715 = sum of:
0.065931715 = weight(_text_:22 in 3107) [ClassicSimilarity], result of:
0.065931715 = score(doc=3107,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.38690117 = fieldWeight in 3107, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3107)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 27. 2.1999 20:59:22
-
Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983)
0.01
0.010988619 = product of:
0.032965858 = sum of:
0.032965858 = product of:
0.065931715 = sum of:
0.065931715 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
0.065931715 = score(doc=2417,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.38690117 = fieldWeight in 2417, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=2417)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Pages
- S.22-25
-
Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973)
0.01
0.008790895 = product of:
0.026372686 = sum of:
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
0.052745372 = score(doc=5002,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 5002, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=5002)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 19. 3.1996 11:22:12
-
Lespinasse, K.: TREC: une conference pour l'evaluation des systemes de recherche d'information (1997)
0.01
0.008790895 = product of:
0.026372686 = sum of:
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 744) [ClassicSimilarity], result of:
0.052745372 = score(doc=744,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 744, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=744)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 1. 8.1996 22:01:00
-
¬The Fifth Text Retrieval Conference (TREC-5) (1997)
0.01
0.008790895 = product of:
0.026372686 = sum of:
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 3087) [ClassicSimilarity], result of:
0.052745372 = score(doc=3087,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 3087, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3087)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Proceedings of the 5th TREC-confrerence held in Gaithersburgh, Maryland, Nov 20-22, 1996. Aim of the conference was discussion on retrieval techniques for large test collections. Different research groups used different techniques, such as automated thesauri, term weighting, natural language techniques, relevance feedback and advanced pattern matching, for information retrieval from the same large database. This procedure makes it possible to compare the results. The proceedings include papers, tables of the system results, and brief system descriptions including timing and storage information
-
Pemberton, J.K.; Ojala, M.; Garman, N.: Head to head : searching the Web versus traditional services (1998)
0.01
0.008790895 = product of:
0.026372686 = sum of:
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 3572) [ClassicSimilarity], result of:
0.052745372 = score(doc=3572,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 3572, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3572)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Online. 22(1998) no.3, S.24-26,28
-
Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.01
0.008790895 = product of:
0.026372686 = sum of:
0.026372686 = product of:
0.052745372 = sum of:
0.052745372 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.052745372 = score(doc=261,freq=2.0), product of:
0.17040971 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04866305 = queryNorm
0.30952093 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
