-
Peritz, B.C.: On the informativeness of titles (1984)
0.02
0.017644923 = product of:
0.1014583 = sum of:
0.018109638 = product of:
0.036219276 = sum of:
0.036219276 = weight(_text_:bibliothekswesen in 2636) [ClassicSimilarity], result of:
0.036219276 = score(doc=2636,freq=2.0), product of:
0.10505787 = queryWeight, product of:
4.457672 = idf(docFreq=1392, maxDocs=44218)
0.023567878 = queryNorm
0.34475547 = fieldWeight in 2636, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.457672 = idf(docFreq=1392, maxDocs=44218)
0.0546875 = fieldNorm(doc=2636)
0.5 = coord(1/2)
0.036987606 = weight(_text_:informationswissenschaft in 2636) [ClassicSimilarity], result of:
0.036987606 = score(doc=2636,freq=2.0), product of:
0.10616633 = queryWeight, product of:
4.504705 = idf(docFreq=1328, maxDocs=44218)
0.023567878 = queryNorm
0.348393 = fieldWeight in 2636, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.504705 = idf(docFreq=1328, maxDocs=44218)
0.0546875 = fieldNorm(doc=2636)
0.036219276 = weight(_text_:bibliothekswesen in 2636) [ClassicSimilarity], result of:
0.036219276 = score(doc=2636,freq=2.0), product of:
0.10505787 = queryWeight, product of:
4.457672 = idf(docFreq=1392, maxDocs=44218)
0.023567878 = queryNorm
0.34475547 = fieldWeight in 2636, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.457672 = idf(docFreq=1392, maxDocs=44218)
0.0546875 = fieldNorm(doc=2636)
0.010141784 = product of:
0.020283569 = sum of:
0.020283569 = weight(_text_:international in 2636) [ClassicSimilarity], result of:
0.020283569 = score(doc=2636,freq=2.0), product of:
0.078619614 = queryWeight, product of:
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.023567878 = queryNorm
0.2579963 = fieldWeight in 2636, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.0546875 = fieldNorm(doc=2636)
0.5 = coord(1/2)
0.17391305 = coord(4/23)
- Field
- Informationswissenschaft
Bibliothekswesen
- Source
- International classification. 11(1984) no.2, S.87-89
-
Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984)
0.00
0.0035008206 = product of:
0.040259436 = sum of:
0.01790758 = weight(_text_:und in 262) [ClassicSimilarity], result of:
0.01790758 = score(doc=262,freq=2.0), product of:
0.052235067 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.023567878 = queryNorm
0.34282678 = fieldWeight in 262, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.109375 = fieldNorm(doc=262)
0.022351854 = product of:
0.044703707 = sum of:
0.044703707 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
0.044703707 = score(doc=262,freq=2.0), product of:
0.08253069 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.023567878 = 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)
0.08695652 = coord(2/23)
- Date
- 20.10.2000 12:22:23
- Source
- Deutscher Dokumentartag 1983, Göttingen, 3.-7.10.1983: Fachinformation und Bildschirmtext. Bearb.: H. Strohl-Goebel
-
Jochum, F.; Weissmann, V.: Struktur und Elemente des Information Retrieval Experiments (1985)
0.00
0.0027058423 = product of:
0.031117186 = sum of:
0.0144715095 = weight(_text_:und in 114) [ClassicSimilarity], result of:
0.0144715095 = score(doc=114,freq=4.0), product of:
0.052235067 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.023567878 = queryNorm
0.27704588 = fieldWeight in 114, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=114)
0.016645677 = weight(_text_:im in 114) [ClassicSimilarity], result of:
0.016645677 = score(doc=114,freq=2.0), product of:
0.066621356 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.023567878 = queryNorm
0.24985497 = fieldWeight in 114, 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=114)
0.08695652 = coord(2/23)
- Abstract
- Eine fundierte Untersuchung der Anforderungen an Experimente im Information Retrieval bedarf einer geeigneten Sprache, die es erlaubt, alle relevanten Aspekte adäquat zu beschreiben. Der Beitrag versucht, ein solches Begriffsgerüst zu entwickeln. Als grundlegende Begriffe dienen die 4 Kategorien: experimentelle Faktoren, situative Faktoren; Experimentalobjekte und Beobachtungsvariablen. Das Begriffsgerüst wird anhand praktischer Beispiele illustriert
-
Blair, D.C.: Full text retrieval : Evaluation and implications (1986)
0.00
0.0015964593 = product of:
0.018359281 = sum of:
0.009666322 = product of:
0.019332644 = sum of:
0.019332644 = weight(_text_:29 in 2047) [ClassicSimilarity], result of:
0.019332644 = score(doc=2047,freq=2.0), product of:
0.08290443 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.023567878 = queryNorm
0.23319192 = fieldWeight in 2047, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=2047)
0.5 = coord(1/2)
0.008692958 = product of:
0.017385917 = sum of:
0.017385917 = weight(_text_:international in 2047) [ClassicSimilarity], result of:
0.017385917 = score(doc=2047,freq=2.0), product of:
0.078619614 = queryWeight, product of:
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.023567878 = queryNorm
0.22113968 = fieldWeight in 2047, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.046875 = fieldNorm(doc=2047)
0.5 = coord(1/2)
0.08695652 = coord(2/23)
- Footnote
- Vgl.: Blair, D.C., M.E. Maron: An evaluation ... Comm. ACM 28(1985) S.280-299; Salton, G.: Another look ... Comm. ACM 29(1986) S.648-656; Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. Proc. Man. 26(1990) S.437-447.
- Source
- International classification. 13(1986), S.18-23
-
Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983)
0.00
0.0014500424 = product of:
0.016675487 = sum of:
0.005499561 = product of:
0.010999122 = sum of:
0.010999122 = weight(_text_:1 in 5001) [ClassicSimilarity], result of:
0.010999122 = score(doc=5001,freq=2.0), product of:
0.057894554 = queryWeight, product of:
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.023567878 = queryNorm
0.18998542 = fieldWeight in 5001, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.0546875 = fieldNorm(doc=5001)
0.5 = coord(1/2)
0.011175927 = product of:
0.022351854 = sum of:
0.022351854 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
0.022351854 = score(doc=5001,freq=2.0), product of:
0.08253069 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.023567878 = 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)
0.08695652 = coord(2/23)
- Date
- 14. 3.1996 13:22:21
- Source
- Special libraries. 74(1983) no.1, S. 56-60
-
Biebricher, P.; Fuhr, N.; Niewelt, B.: ¬Der AIR-Retrievaltest (1986)
0.00
9.632559E-4 = product of:
0.022154884 = sum of:
0.022154884 = weight(_text_:und in 4040) [ClassicSimilarity], result of:
0.022154884 = score(doc=4040,freq=6.0), product of:
0.052235067 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.023567878 = queryNorm
0.42413816 = fieldWeight in 4040, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.078125 = fieldNorm(doc=4040)
0.04347826 = coord(1/23)
- Abstract
- Der Beitrag enthält eine Darstellung zur Durchführung und zu den Ergebnissen des Retrievaltests zum AIR/PHYS-Projekt. Er zählt mit seinen 309 Fragen und 15.000 Dokumenten zu den größten Retrievaltests, die bisher zur Evaluierung automatisierter Indexierungs- oder Retrievalverfahren vorgenommen wurden.
- Source
- Automatische Indexierung zwischen Forschung und Anwendung, Hrsg.: G. Lustig
-
Croft, W.B.; Thompson, R.H.: Support for browsing in an intelligent text retrieval system (1989)
0.00
8.818943E-4 = product of:
0.020283569 = sum of:
0.020283569 = product of:
0.040567137 = sum of:
0.040567137 = weight(_text_:international in 5004) [ClassicSimilarity], result of:
0.040567137 = score(doc=5004,freq=2.0), product of:
0.078619614 = queryWeight, product of:
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.023567878 = queryNorm
0.5159926 = fieldWeight in 5004, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.109375 = fieldNorm(doc=5004)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Source
- International journal of man-machine studies. 30(1989), S.639-668
-
Blair, D.C.; Maron, M.E.: ¬An evaluation of retrieval effectiveness for a full-text document-retrieval system (1985)
0.00
7.0045807E-4 = product of:
0.016110536 = sum of:
0.016110536 = product of:
0.03222107 = sum of:
0.03222107 = weight(_text_:29 in 1345) [ClassicSimilarity], result of:
0.03222107 = score(doc=1345,freq=2.0), product of:
0.08290443 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.023567878 = queryNorm
0.38865322 = fieldWeight in 1345, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.078125 = fieldNorm(doc=1345)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Footnote
- Vgl. auch : Salton, G.: Another look ... Comm. ACM 29(1986) S.S.648-656; Blair, D.C.: Full text retrieval ... Int. Class. 13(1986) S.18-23: Blair, D.C., M.E. Maron: Full-text information retrieval ... Inf. proc. man. 26(1990) S.437-447.
-
Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983)
0.00
6.94157E-4 = product of:
0.01596561 = sum of:
0.01596561 = product of:
0.03193122 = sum of:
0.03193122 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
0.03193122 = score(doc=2417,freq=2.0), product of:
0.08253069 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.023567878 = 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)
0.04347826 = coord(1/23)
- Pages
- S.22-25
-
Regazzi, J.J.: Evaluating indexing systems : a review after Cranfield (1980)
0.00
5.4654025E-4 = product of:
0.012570425 = sum of:
0.012570425 = product of:
0.02514085 = sum of:
0.02514085 = weight(_text_:1 in 1849) [ClassicSimilarity], result of:
0.02514085 = score(doc=1849,freq=2.0), product of:
0.057894554 = queryWeight, product of:
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.023567878 = queryNorm
0.4342524 = fieldWeight in 1849, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.125 = fieldNorm(doc=1849)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Source
- Indexer. 12(1980) no.1, S.15-20
-
Schabas, A.H.: Postcoordinate retrieval : a comparison of two retrieval languages (1982)
0.00
5.427938E-4 = product of:
0.012484257 = sum of:
0.012484257 = weight(_text_:im in 1202) [ClassicSimilarity], result of:
0.012484257 = score(doc=1202,freq=2.0), product of:
0.066621356 = queryWeight, product of:
2.8267863 = idf(docFreq=7115, maxDocs=44218)
0.023567878 = 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)
0.04347826 = coord(1/23)
- Theme
- Verbale Doksprachen im Online-Retrieval
-
Hartley, D.: ¬A 'laboratory' method for the comparison of retrieval effectiveness in manual and online searching (1984)
0.00
5.0393963E-4 = product of:
0.011590611 = sum of:
0.011590611 = product of:
0.023181222 = sum of:
0.023181222 = weight(_text_:international in 8919) [ClassicSimilarity], result of:
0.023181222 = score(doc=8919,freq=2.0), product of:
0.078619614 = queryWeight, product of:
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.023567878 = queryNorm
0.2948529 = fieldWeight in 8919, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.33588 = idf(docFreq=4276, maxDocs=44218)
0.0625 = fieldNorm(doc=8919)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Source
- 7th International Online Information Meeting, London, 6.-8.12.1983
-
Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
0.00
4.1649418E-4 = product of:
0.009579366 = sum of:
0.009579366 = product of:
0.019158732 = sum of:
0.019158732 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
0.019158732 = score(doc=3564,freq=2.0), product of:
0.08253069 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.023567878 = queryNorm
0.23214069 = fieldWeight in 3564, 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=3564)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Date
- 9. 1.1996 10:22:31
-
MacCain, K.W.: Descriptor and citation retrieval in the medical behavioral sciences literature : retrieval overlaps and novelty distribution (1989)
0.00
3.5498835E-4 = product of:
0.008164732 = sum of:
0.008164732 = product of:
0.016329464 = sum of:
0.016329464 = weight(_text_:1 in 2290) [ClassicSimilarity], result of:
0.016329464 = score(doc=2290,freq=6.0), product of:
0.057894554 = queryWeight, product of:
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.023567878 = queryNorm
0.28205526 = fieldWeight in 2290, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.046875 = fieldNorm(doc=2290)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Abstract
- Search results for nine topics in the medical behavioral sciences are reanalyzed to compare the overall perfor-mance of descriptor and citation search strategies in identifying relevant and novel documents. Overlap per- centages between an aggregate "descriptor-based" database (MEDLINE, EXERPTA MEDICA, PSYCINFO) and an aggregate "citation-based" database (SCISEARCH, SOCIAL SCISEARCH) ranged from 1% to 26%, with a median overlap of 8% relevant retrievals found using both search strategies. For seven topics in which both descriptor and citation strategies produced reasonably substantial retrievals, two patterns of search performance and novelty distribution were observed: (1) where descriptor and citation retrieval showed little overlap, novelty retrieval percentages differed by 17-23% between the two strategies; (2) topics with a relatively high percentage retrieval overlap shoed little difference (1-4%) in descriptor and citation novelty retrieval percentages. These results reflect the varying partial congruence of two literature networks and represent two different types of subject relevance
-
MacCain, K.W.; White, H.D.; Griffith, B.C.: Comparing retrieval performance in online data bases (1987)
0.00
1.707938E-4 = product of:
0.0039282576 = sum of:
0.0039282576 = product of:
0.007856515 = sum of:
0.007856515 = weight(_text_:1 in 1167) [ClassicSimilarity], result of:
0.007856515 = score(doc=1167,freq=2.0), product of:
0.057894554 = queryWeight, product of:
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.023567878 = queryNorm
0.13570388 = fieldWeight in 1167, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4565027 = idf(docFreq=10304, maxDocs=44218)
0.0390625 = fieldNorm(doc=1167)
0.5 = coord(1/2)
0.04347826 = coord(1/23)
- Abstract
- This study systematically compares retrievals on 11 topics across five well-known data bases, with MEDLINE's subject indexing as a focus. Each topic was posed by a researcher in the medical behavioral sciences. Each was searches in MEDLINE, EXCERPTA MEDICA, and PSYCHINFO, which permit descriptor searches, and in SCISEARCH and SOCIAL SCISEARCH, which express topics through cited references. Searches on each topic were made with (1) descriptors, (2) cited references, and (3) natural language (a capabiblity common to all five data bases). The researchers who posed the topics judged the results. In every case, the set of records judged relevant was used to to calculate recall, precision, and novelty ratios. Overall, MEDLINE had the highest recall percentage (37%), followed by SSCI (31%). All searches resulted in high precision ratios; novelty ratios of data bases and searches varied widely. Differences in record format among data bases affected the success of the natural language retrievals. Some 445 documents judged relevant were not retrieved from MEDLINE using its descriptors; they were found in MEDLINE through natural language or in an alternative data base. An analysis was performed to examine possible faults in MEDLINE subject indexing as the reason for their nonretrieval. However, no patterns of indexing failure could be seen in those documents subsequently found in MEDLINE through known-item searches. Documents not found in MEDLINE primarily represent failures of coverage - articles were from nonindexed or selectively indexed journals
