-
Schabas, A.H.: ¬A comparative evaluation of the retrieval effectiveness of titles, Library of Congress Subject Headings and PRECIS strings for computer searching of UK MARC data (1979)
0.10
0.102634095 = product of:
0.15395114 = sum of:
0.054054987 = weight(_text_:im in 5277) [ClassicSimilarity], result of:
0.054054987 = score(doc=5277,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.37478244 = fieldWeight in 5277, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.09375 = fieldNorm(doc=5277)
0.09989615 = product of:
0.14984421 = sum of:
0.062307306 = weight(_text_:online in 5277) [ClassicSimilarity], result of:
0.062307306 = score(doc=5277,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.40237486 = fieldWeight in 5277, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.09375 = fieldNorm(doc=5277)
0.08753691 = weight(_text_:retrieval in 5277) [ClassicSimilarity], result of:
0.08753691 = score(doc=5277,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.5671716 = fieldWeight in 5277, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=5277)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998)
0.08
0.080562115 = product of:
0.24168634 = sum of:
0.24168634 = sum of:
0.07269186 = weight(_text_:online in 6418) [ClassicSimilarity], result of:
0.07269186 = score(doc=6418,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.46943733 = fieldWeight in 6418, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.109375 = fieldNorm(doc=6418)
0.07221426 = weight(_text_:retrieval in 6418) [ClassicSimilarity], result of:
0.07221426 = score(doc=6418,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.46789268 = fieldWeight in 6418, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=6418)
0.09678023 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
0.09678023 = score(doc=6418,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = 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)
0.33333334 = coord(1/3)
- Source
- Online. 22(1998) no.6, S.57-58
-
Drabenstott, K.M.; Vizine-Goetz, D.: Using subject headings for online retrieval : theory, practice and potential (1994)
0.08
0.076489285 = product of:
0.11473393 = sum of:
0.027027493 = weight(_text_:im in 386) [ClassicSimilarity], result of:
0.027027493 = score(doc=386,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.18739122 = fieldWeight in 386, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.046875 = fieldNorm(doc=386)
0.08770643 = product of:
0.13155964 = sum of:
0.06966169 = weight(_text_:online in 386) [ClassicSimilarity], result of:
0.06966169 = score(doc=386,freq=10.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.4498688 = fieldWeight in 386, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=386)
0.06189794 = weight(_text_:retrieval in 386) [ClassicSimilarity], result of:
0.06189794 = score(doc=386,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.40105087 = fieldWeight in 386, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=386)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Abstract
- Using subject headings for Online Retrieval is an indispensable tool for online system desingners who are developing new systems or refining exicting ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject headings system and system characteristics, shows how information is stored in machine readable files, and offers examples of and recommendations for successful methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analyses.
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Bodoff, D.; Kambil, A.: Partial coordination : II. A preliminary evaluation and failure analysis (1998)
0.07
0.0712926 = product of:
0.1069389 = sum of:
0.027027493 = weight(_text_:im in 2323) [ClassicSimilarity], result of:
0.027027493 = score(doc=2323,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.18739122 = fieldWeight in 2323, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.046875 = fieldNorm(doc=2323)
0.0799114 = product of:
0.1198671 = sum of:
0.04405792 = weight(_text_:online in 2323) [ClassicSimilarity], result of:
0.04405792 = score(doc=2323,freq=4.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.284522 = fieldWeight in 2323, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=2323)
0.07580918 = weight(_text_:retrieval in 2323) [ClassicSimilarity], result of:
0.07580918 = score(doc=2323,freq=12.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.49118498 = fieldWeight in 2323, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2323)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Abstract
- Partial coordination is a new method for cataloging documents for subject access. It is especially designed to enhance the precision of document searches in online environments. This article reports a preliminary evaluation of partial coordination that shows promising results compared with full-text retrieval. We also report the difficulties in empirically evaluating the effectiveness of automatic full-text retrieval in contrast to mixed methods such as partial coordination which combine human cataloging with computerized retrieval. Based on our study, we propose research in this area will substantially benefit from a common framework for failure analysis and a common data set. This will allow information retrieval researchers adapting 'library style'cataloging to large electronic document collections, as well as those developing automated or mixed methods, to directly compare their proposals for indexing and retrieval. This article concludes by suggesting guidelines for constructing such as testbed
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Keen, E.M.: Aspects of computer-based indexing languages (1991)
0.07
0.06842273 = product of:
0.10263409 = sum of:
0.03603666 = weight(_text_:im in 5072) [ClassicSimilarity], result of:
0.03603666 = score(doc=5072,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.24985497 = fieldWeight in 5072, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.066597424 = product of:
0.09989613 = sum of:
0.0415382 = weight(_text_:online in 5072) [ClassicSimilarity], result of:
0.0415382 = score(doc=5072,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.2682499 = fieldWeight in 5072, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.058357935 = weight(_text_:retrieval in 5072) [ClassicSimilarity], result of:
0.058357935 = score(doc=5072,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.37811437 = fieldWeight in 5072, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=5072)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Abstract
- Comments on the relative rarity of research articles on theoretical aspects of subject indexing in computerised retrieval systems and the predominance of articles on software packages and hardware. Concludes that controlled indexing still has a future but points to major differences from the past
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Schabas, A.H.: Postcoordinate retrieval : a comparison of two retrieval languages (1982)
0.06
0.059374597 = product of:
0.08906189 = sum of:
0.027027493 = weight(_text_:im in 1202) [ClassicSimilarity], result of:
0.027027493 = score(doc=1202,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.18739122 = fieldWeight in 1202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.046875 = fieldNorm(doc=1202)
0.0620344 = product of:
0.0930516 = sum of:
0.031153653 = weight(_text_:online in 1202) [ClassicSimilarity], result of:
0.031153653 = score(doc=1202,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.20118743 = fieldWeight in 1202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=1202)
0.06189794 = weight(_text_:retrieval in 1202) [ClassicSimilarity], result of:
0.06189794 = score(doc=1202,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.40105087 = fieldWeight in 1202, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=1202)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Abstract
- This article reports on a comparison of the postcoordinate retrieval effectiveness of two indexing languages: LCSH and PRECIS. The effect of augmenting each with title words was also studies. The database for the study was over 15.000 UK MARC records. Users returned 5.326 relevant judgements for citations retrieved for 61 SDI profiles, representing a wide variety of subjects. Results are reported in terms of precision and relative recall. Pure/applied sciences data and social science data were analyzed separately. Cochran's significance tests for ratios were used to interpret the findings. Recall emerged as the more important measure discriminating the behavior of the two languages. Addition of title words was found to improve recall of both indexing languages significantly. A direct relationship was observed between recall and exhaustivity. For the social sciences searches, recalls from PRECIS alone and from PRECIS with title words were significantly higher than those from LCSH alone and from LCSH with title words, respectively. Corresponding comparisons for the pure/applied sciences searches revealed no significant differences
- Theme
- Verbale Doksprachen im Online-Retrieval
-
McJunkin, M.C.: Precision and recall in title keyword searching (1995)
0.05
0.05135473 = product of:
0.07703209 = sum of:
0.027027493 = weight(_text_:im in 3351) [ClassicSimilarity], result of:
0.027027493 = score(doc=3351,freq=2.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.18739122 = fieldWeight in 3351, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.046875 = fieldNorm(doc=3351)
0.050004594 = product of:
0.07500689 = sum of:
0.04405792 = weight(_text_:online in 3351) [ClassicSimilarity], result of:
0.04405792 = score(doc=3351,freq=4.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.284522 = fieldWeight in 3351, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=3351)
0.03094897 = weight(_text_:retrieval in 3351) [ClassicSimilarity], result of:
0.03094897 = score(doc=3351,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.20052543 = fieldWeight in 3351, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=3351)
0.6666667 = coord(2/3)
0.6666667 = coord(2/3)
- Abstract
- Investigates the extent to which title keywords convey subject content and compares the relative effectiveness of searching title keywords using 2 search strategies to examine whether adjacency operators in title keyword searches are effective in improving recall and precision of online searching. Title keywords from a random sample of titles in the field of economics were searched on FirstSearch, using the WorldCat database, which is equivalent in coverage to the OCLC OLUC, with and without adjacency of the keywords specified. The LCSH of the items retrieved were compared with the sample title subject headings to determine the degree of match or relevance and the values for precision and recall were calculated. Results indicated that, when keywords were discipline specific, adjacency operators improved precision with little degradation of recall. Systems that allow positional operators or rank output by proximity of terms may increase search success
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Munkelt, J.: Erstellung einer DNB-Retrieval-Testkollektion (2018)
0.04
0.044433918 = product of:
0.066650875 = sum of:
0.054615162 = weight(_text_:im in 4310) [ClassicSimilarity], result of:
0.054615162 = score(doc=4310,freq=6.0), product of:
0.1442303 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.051022716 = queryNorm
0.37866634 = fieldWeight in 4310, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.0546875 = fieldNorm(doc=4310)
0.012035711 = product of:
0.03610713 = sum of:
0.03610713 = weight(_text_:retrieval in 4310) [ClassicSimilarity], result of:
0.03610713 = score(doc=4310,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.23394634 = fieldWeight in 4310, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=4310)
0.33333334 = coord(1/3)
0.6666667 = coord(2/3)
- Abstract
- Seit Herbst 2017 findet in der Deutschen Nationalbibliothek die Inhaltserschließung bestimmter Medienwerke rein maschinell statt. Die Qualität dieses Verfahrens, das die Prozessorganisation von Bibliotheken maßgeblich prägen kann, wird unter Fachleuten kontrovers diskutiert. Ihre Standpunkte werden zunächst hinreichend erläutert, ehe die Notwendigkeit einer Qualitätsprüfung des Verfahrens und dessen Grundlagen dargelegt werden. Zentraler Bestandteil einer künftigen Prüfung ist eine Testkollektion. Ihre Erstellung und deren Dokumentation steht im Fokus dieser Arbeit. In diesem Zusammenhang werden auch die Entstehungsgeschichte und Anforderungen an gelungene Testkollektionen behandelt. Abschließend wird ein Retrievaltest durchgeführt, der die Einsatzfähigkeit der erarbeiteten Testkollektion belegt. Seine Ergebnisse dienen ausschließlich der Funktionsüberprüfung. Eine Qualitätsbeurteilung maschineller Inhaltserschließung im Speziellen sowie im Allgemeinen findet nicht statt und ist nicht Ziel der Ausarbeitung.
-
Ellis, D.: Progress and problems in information retrieval (1996)
0.04
0.038226414 = product of:
0.11467924 = sum of:
0.11467924 = product of:
0.17201886 = sum of:
0.11671587 = weight(_text_:retrieval in 789) [ClassicSimilarity], result of:
0.11671587 = score(doc=789,freq=16.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.75622874 = fieldWeight in 789, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=789)
0.055302992 = weight(_text_:22 in 789) [ClassicSimilarity], result of:
0.055302992 = score(doc=789,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = queryNorm
0.30952093 = fieldWeight in 789, 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=789)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- An introduction to the principal generic approaches to information retrieval research with their associated concepts, models and systems, this text is designed to keep the information professional up to date with the major themes and developments that have preoccupied researchers in recent month in relation to textual and documentary retrieval systems.
- COMPASS
- Information retrieval
- Content
- First published 1991 as New horizons in information retrieval
- Date
- 26. 7.2002 20:22:46
- LCSH
- Information retrieval
- Subject
- Information retrieval
Information retrieval
-
Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000)
0.04
0.03755433 = product of:
0.11266299 = sum of:
0.11266299 = product of:
0.16899449 = sum of:
0.07221426 = weight(_text_:retrieval in 6438) [ClassicSimilarity], result of:
0.07221426 = score(doc=6438,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.46789268 = fieldWeight in 6438, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=6438)
0.09678023 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
0.09678023 = score(doc=6438,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = 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)
0.6666667 = coord(2/3)
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)
0.04
0.03755433 = product of:
0.11266299 = sum of:
0.11266299 = product of:
0.16899449 = sum of:
0.07221426 = weight(_text_:retrieval in 5089) [ClassicSimilarity], result of:
0.07221426 = score(doc=5089,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.46789268 = fieldWeight in 5089, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.109375 = fieldNorm(doc=5089)
0.09678023 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
0.09678023 = score(doc=5089,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = 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)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Date
- 22. 7.2006 18:43:54
-
King, D.W.: Blazing new trails : in celebration of an audacious career (2000)
0.04
0.03736912 = product of:
0.11210736 = sum of:
0.11210736 = sum of:
0.025961377 = weight(_text_:online in 1184) [ClassicSimilarity], result of:
0.025961377 = score(doc=1184,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.16765618 = fieldWeight in 1184, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0390625 = fieldNorm(doc=1184)
0.051581617 = weight(_text_:retrieval in 1184) [ClassicSimilarity], result of:
0.051581617 = score(doc=1184,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.33420905 = fieldWeight in 1184, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1184)
0.03456437 = weight(_text_:22 in 1184) [ClassicSimilarity], result of:
0.03456437 = score(doc=1184,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = queryNorm
0.19345059 = fieldWeight in 1184, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1184)
0.33333334 = coord(1/3)
- Abstract
- I had the distinct pleasure of working with Pauline Atherton (Cochrane) during the 1960s, a period that can be considered the heyday of automated information system design and evaluation in the United States. I first met Pauline at the 1962 American Documentation Institute annual meeting in North Hollywood, Florida. My company, Westat Research Analysts, had recently been awarded a contract by the U.S. Patent Office to provide statistical support for the design of experiments with automated information retrieval systems. I was asked to attend the meeting to learn more about information retrieval systems and to begin informing others of U.S. Patent Office activities in this area. At one session, Pauline and I questioned a speaker about the research that he presented. Pauline's questions concerned the logic of their approach and mine, the statistical aspects. After the session, she came over to talk to me and we began a professional and personal friendship that continues to this day. During the 1960s, Pauline was involved in several important information-retrieval projects including a series of studies for the American Institute of Physics, a dissertation examining the relevance of retrieved documents, and development and evaluation of an online information-retrieval system. I had the opportunity to work with Pauline and her colleagues an four of those projects and will briefly describe her work in the 1960s.
- Date
- 22. 9.1997 19:16:05
-
Barraclough, E.D.: Opportunities for testing with online systems (1981)
0.04
0.036801554 = product of:
0.11040466 = sum of:
0.11040466 = product of:
0.16560699 = sum of:
0.0830764 = weight(_text_:online in 3151) [ClassicSimilarity], result of:
0.0830764 = score(doc=3151,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.5364998 = fieldWeight in 3151, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.125 = fieldNorm(doc=3151)
0.08253059 = weight(_text_:retrieval in 3151) [ClassicSimilarity], result of:
0.08253059 = score(doc=3151,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.5347345 = fieldWeight in 3151, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=3151)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Source
- Information retrieval experiment. Ed.: K. Sparck Jones
-
Hartley, D.: ¬A 'laboratory' method for the comparison of retrieval effectiveness in manual and online searching (1984)
0.03
0.034344442 = product of:
0.10303333 = sum of:
0.10303333 = product of:
0.15454999 = sum of:
0.0830764 = weight(_text_:online in 8919) [ClassicSimilarity], result of:
0.0830764 = score(doc=8919,freq=8.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.5364998 = fieldWeight in 8919, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0625 = fieldNorm(doc=8919)
0.07147358 = weight(_text_:retrieval in 8919) [ClassicSimilarity], result of:
0.07147358 = score(doc=8919,freq=6.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.46309367 = fieldWeight in 8919, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=8919)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- The paper provides a brief review of a number of published studies of the comparative retrieval effectiveness of manual and online searching. A description of a 'laboratory' approach to the comparison of retrieval effectiveness of manual and online searching is presented. Results, which have been obtained, using this approach are presented. it is suggested that the methodology could be adopted easily elsewhere
- Source
- 7th International Online Information Meeting, London, 6.-8.12.1983
-
Drabenstott, K.M.; Weller, M.S.: ¬A comparative approach to system evaluation : delegating control of retrieval tests to an experimental online system (1996)
0.03
0.034108054 = product of:
0.10232416 = sum of:
0.10232416 = product of:
0.15348624 = sum of:
0.081271976 = weight(_text_:online in 7435) [ClassicSimilarity], result of:
0.081271976 = score(doc=7435,freq=10.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.524847 = fieldWeight in 7435, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0546875 = fieldNorm(doc=7435)
0.07221426 = weight(_text_:retrieval in 7435) [ClassicSimilarity], result of:
0.07221426 = score(doc=7435,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.46789268 = fieldWeight in 7435, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=7435)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- Describes the comparative approach to system evaluation used in this research project which delegated the administartion of an online retrieval test to an experimental online catalogue to produce data for evaluating the effectiveness of a new subject access design. Describes the methods enlisted to sort out problem test administration, e.g. to identify out-of-scope queries, incomplete system administration, and suspect post-search questionnaire responses. Covers how w the researchers handled problem search administrations and what actions they would use to reduce or eliminate the occurrence of such administrations in future online retrieval tests that delegate control of retrieval tests to online systems
-
Chen, H.; Dhar, V.: Cognitive process as a basis for intelligent retrieval system design (1991)
0.03
0.03355909 = product of:
0.10067727 = sum of:
0.10067727 = product of:
0.1510159 = sum of:
0.058743894 = weight(_text_:online in 3845) [ClassicSimilarity], result of:
0.058743894 = score(doc=3845,freq=4.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.37936267 = fieldWeight in 3845, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0625 = fieldNorm(doc=3845)
0.092272 = weight(_text_:retrieval in 3845) [ClassicSimilarity], result of:
0.092272 = score(doc=3845,freq=10.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.59785134 = fieldWeight in 3845, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=3845)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- 2 studies were conducted to investigate the cognitive processes involved in online document-based information retrieval. These studies led to the development of 5 computerised models of online document retrieval. These models were incorporated into a design of an 'intelligent' document-based retrieval system. Following a discussion of this system, discusses the broader implications of the research for the design of information retrieval sysems
-
Shafique, M.; Chaudhry, A.S.: Intelligent agent-based online information retrieval (1995)
0.03
0.032623697 = product of:
0.09787109 = sum of:
0.09787109 = product of:
0.14680663 = sum of:
0.053959712 = weight(_text_:online in 3851) [ClassicSimilarity], result of:
0.053959712 = score(doc=3851,freq=6.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.34846687 = fieldWeight in 3851, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=3851)
0.09284691 = weight(_text_:retrieval in 3851) [ClassicSimilarity], result of:
0.09284691 = score(doc=3851,freq=18.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.60157627 = fieldWeight in 3851, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=3851)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- Describes an intelligent agent based information retrieval model. The relevance matrix used by the intelligent agent consists of rows and columns; rows represent the documents and columns are used for keywords. Entries represent predetermined weights of keywords in documents. The search/query vector is constructed by the intelligent agent through explicit interaction with the user, using an interactive query refinement techniques. With manipulation of the relevance matrix against the search vector, the agent uses the manipulated information to filter the document representations and retrieve the most relevant documents, consequently improving the retrieval performance. Work is in progress on an experiment to compare the retrieval results from a conventional retrieval model and an intelligent agent based retrieval model. A test document collection on artificial intelligence has been selected as a sample. Retrieval tests are being carried out on a selected group of researchers using the 2 retrieval systems. Results will be compared to assess the retrieval performance using precision and recall matrices
- Source
- Online information 95: Proceedings of the 19th International online information meeting, London, 5-7 December 1995. Ed.: D.I. Raitt u. B. Jeapes
-
Sanderson, M.: ¬The Reuters test collection (1996)
0.03
0.030629685 = product of:
0.09188905 = sum of:
0.09188905 = product of:
0.13783358 = sum of:
0.08253059 = weight(_text_:retrieval in 6971) [ClassicSimilarity], result of:
0.08253059 = score(doc=6971,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.5347345 = fieldWeight in 6971, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=6971)
0.055302992 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
0.055302992 = score(doc=6971,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = 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)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- Describes the Reuters test collection, which at 22.173 references is significantly larger than most traditional test collections. In addition, Reuters has none of the recall calculation problems normally associated with some of the larger test collections available. Explains the method derived by D.D. Lewis to perform retrieval experiments on the Reuters collection and illustrates the use of the Reuters collection using some simple retrieval experiments that compare the performance of stemming algorithms
- 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
-
Drabenstott, K.M.; Weller, M.S.: Improving personal-name searching in online catalogs (1996)
0.03
0.029393207 = product of:
0.08817962 = sum of:
0.08817962 = product of:
0.13226943 = sum of:
0.0961623 = weight(_text_:online in 6742) [ClassicSimilarity], result of:
0.0961623 = score(doc=6742,freq=14.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.62100726 = fieldWeight in 6742, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0546875 = fieldNorm(doc=6742)
0.03610713 = weight(_text_:retrieval in 6742) [ClassicSimilarity], result of:
0.03610713 = score(doc=6742,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.23394634 = fieldWeight in 6742, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=6742)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Abstract
- Reports results of a study to examine the performance of online catalogue searches involving personal names and to recommend improvements to the basic system approach to soliciting user queries and searching for them. The research questions addressed in the study wre: how online systems can chose searching approaches on their own that are likely to produce useful retrieval; how online systems solicit queries from users; and how users respond to an experimental online catalogue that prompts them for the different elements of their personal name queries. Improvements include: the implementation of a new design for online catalogue searching that features search trees; new methods for soliciting user queries bearing personal names; and enlisting the participation of online catalogue users in the evaluation of system prompts, instructions, and messages that request input from them
-
Information retrieval experiment (1981)
0.03
0.029305872 = product of:
0.08791761 = sum of:
0.08791761 = product of:
0.13187641 = sum of:
0.03634593 = weight(_text_:online in 2653) [ClassicSimilarity], result of:
0.03634593 = score(doc=2653,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.23471867 = fieldWeight in 2653, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0546875 = fieldNorm(doc=2653)
0.09553049 = weight(_text_:retrieval in 2653) [ClassicSimilarity], result of:
0.09553049 = score(doc=2653,freq=14.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.61896384 = fieldWeight in 2653, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=2653)
0.6666667 = coord(2/3)
0.33333334 = coord(1/3)
- Content
- Enthält die Beiträge: ROBERTSON, S.E.: The methodology of information retrieval experiment; RIJSBERGEN, C.J. van: Retrieval effectiveness; BELKIN, N.: Ineffable concepts in information retrieval; TAGUE, J.M.: The pragmatics of information retrieval experimentation; LANCASTER, F.W.: Evaluation within the environment of an operating information service; BARRACLOUGH, E.D.: Opportunities for testing with online systems; KEEN, M.E.: Laboratory tests of manual systems; ODDY, R.N.: Laboratory tests: automatic systems; HEINE, M.D.: Simulation, and simulation experiments; COOPER, W.S.: Gedanken experimentation: an alternative to traditional system testing?; SPARCK JONES, K.: Actual tests - retrieval system tests; EVANS, L.: An experiment: search strategy variation in SDI profiles; SALTON, G.: The Smart environment for retrieval system evaluation - advantage and problem areas
