-
Huang, Y.-L.: ¬A theoretic and empirical research of cluster indexing for Mandarine Chinese full text document (1998)
0.02
0.020983277 = product of:
0.06294983 = sum of:
0.06294983 = product of:
0.12589966 = sum of:
0.12589966 = weight(_text_:indexing in 513) [ClassicSimilarity], result of:
0.12589966 = score(doc=513,freq=10.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.6619802 = fieldWeight in 513, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0546875 = fieldNorm(doc=513)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Since most popular commercialized systems for full text retrieval are designed with full text scaning and Boolean logic query mode, these systems use an oversimplified relationship between the indexing form and the content of document. Reports the use of Singular Value Decomposition (SVD) to develop a Cluster Indexing Model (CIM) based on a Vector Space Model (VSM) in orer to explore the index theory of cluster indexing for chinese full text documents. From a series of experiments, it was found that the indexing performance of CIM is better than traditional VSM, and has almost equivalent effectiveness of the authority control of index terms
-
Warner, A.J.: ¬The role of linguistic analysis in full-text retrieval (1994)
0.02
0.018768014 = product of:
0.05630404 = sum of:
0.05630404 = product of:
0.11260808 = sum of:
0.11260808 = weight(_text_:indexing in 2992) [ClassicSimilarity], result of:
0.11260808 = score(doc=2992,freq=2.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.5920931 = fieldWeight in 2992, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.109375 = fieldNorm(doc=2992)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Challenges in indexing electronic text and images. Ed.: R. Fidel et al
-
Sieverts, E.G.; Hofstede, M.; Groeniger, B.O.: Software for information storage and retrieval tested, evaluated and compared : pt.4: indexing and full-text retrieval programs (1992)
0.02
0.016086869 = product of:
0.048260607 = sum of:
0.048260607 = product of:
0.09652121 = sum of:
0.09652121 = weight(_text_:indexing in 2051) [ClassicSimilarity], result of:
0.09652121 = score(doc=2051,freq=8.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.5075084 = fieldWeight in 2051, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.046875 = fieldNorm(doc=2051)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- In this article, the fourth in a series on microcomputer software for information storage and retrieval, test results of six indexing and full-text retrieval programs are presented and various properties and qualities of these programs are discussed. The common faeture of programs in these categories is that they are primarily meant to retrieve words (or combination of them) in large text files. To do this they either simply index existing text files in one or more formats (indexing programs), or they store and index them in their own database format (full-text retrieval programs). The programs reviewed in this issue are the indexing programs Ask-it, Texplore and ZYindex and the full-text retrieval programs KAware, textMaster and WordCruncher. All programs run under MS-DOS. In addition ZYindex has a Windows and a Unix version and TextMaster is also available for for Unix. For each of the six programs almost 100 facts and test results are tabulated. The programs are also discussed individually
-
Dow Jones unveils knowledge indexing system (1997)
0.02
0.015166845 = product of:
0.045500536 = sum of:
0.045500536 = product of:
0.09100107 = sum of:
0.09100107 = weight(_text_:indexing in 751) [ClassicSimilarity], result of:
0.09100107 = score(doc=751,freq=4.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.47848347 = fieldWeight in 751, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0625 = fieldNorm(doc=751)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Dow Jones Interactive Publishing has developed a sophisticated automatic knowledge indexing system that will allow searchers of the Dow Jones News / Retrieval service to get highly targeted results from a search in the service's Publications Library. Instead of relying on a thesaurus of company names, the new system uses a combination of that basic algorithm plus unique rules based on the editorial styles of individual publications in the Library. Dow Jones have also announced its acceptance of the definitions of 'selected full text' and 'full text' from Bibliodata's Fulltext Sources Online directory
-
Hider, P.: ¬The search value added by professional indexing to a bibliographic database (2018)
0.01
0.014988055 = product of:
0.044964164 = sum of:
0.044964164 = product of:
0.08992833 = sum of:
0.08992833 = weight(_text_:indexing in 4300) [ClassicSimilarity], result of:
0.08992833 = score(doc=4300,freq=10.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.47284302 = fieldWeight in 4300, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0390625 = fieldNorm(doc=4300)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Gross et al. (2015) have demonstrated that about a quarter of hits would typically be lost to keyword searchers if contemporary academic library catalogs dropped their controlled subject headings. This article reports on an investigation of the search value that subject descriptors and identifiers assigned by professional indexers add to a bibliographic database, namely the Australian Education Index (AEI). First, a similar methodology to that developed by Gross et al. (2015) was applied, with keyword searches representing a range of educational topics run on the AEI database with and without its subject indexing. The results indicated that AEI users would also lose, on average, about a quarter of hits per query. Second, an alternative research design was applied in which an experienced literature searcher was asked to find resources on a set of educational topics on an AEI database stripped of its subject indexing and then asked to search for additional resources on the same topics after the subject indexing had been reinserted. In this study, the proportion of additional resources that would have been lost had it not been for the subject indexing was again found to be about a quarter of the total resources found for each topic, on average.
-
Hider, P.: ¬The search value added by professional indexing to a bibliographic database (2017)
0.01
0.011609698 = product of:
0.03482909 = sum of:
0.03482909 = product of:
0.06965818 = sum of:
0.06965818 = weight(_text_:indexing in 3868) [ClassicSimilarity], result of:
0.06965818 = score(doc=3868,freq=6.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.3662626 = fieldWeight in 3868, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0390625 = fieldNorm(doc=3868)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Gross et al. (2015) have demonstrated that about a quarter of hits would typically be lost to keyword searchers if contemporary academic library catalogs dropped their controlled subject headings. This paper reports on an analysis of the loss levels that would result if a bibliographic database, namely the Australian Education Index (AEI), were missing the subject descriptors and identifiers assigned by its professional indexers, employing the methodology developed by Gross and Taylor (2005), and later by Gross et al. (2015). The results indicate that AEI users would lose a similar proportion of hits per query to that experienced by library catalog users: on average, 27% of the resources found by a sample of keyword queries on the AEI database would not have been found without the subject indexing, based on the Australian Thesaurus of Education Descriptors (ATED). The paper also discusses the methodological limitations of these studies, pointing out that real-life users might still find some of the resources missed by a particular query through follow-up searches, while additional resources might also be found through iterative searching on the subject vocabulary. The paper goes on to describe a new research design, based on a before - and - after experiment, which addresses some of these limitations. It is argued that this alternative design will provide a more realistic picture of the value that professionally assigned subject indexing and controlled subject vocabularies can add to literature searching of a more scholarly and thorough kind.
-
Basch, R.: Searching full-text : tips and techniques (1992)
0.01
0.01072458 = product of:
0.032173738 = sum of:
0.032173738 = product of:
0.064347476 = sum of:
0.064347476 = weight(_text_:indexing in 5050) [ClassicSimilarity], result of:
0.064347476 = score(doc=5050,freq=2.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.3383389 = fieldWeight in 5050, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0625 = fieldNorm(doc=5050)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Gives tips for effective searching of full-text databases: think creatively about vocabulary and use of the OR connector to link synonyms; use truncation to pick up plurals and alternative work endings; anticipate international differences in spellimg, likie 'labor' and 'labour', and in vocabulary, like 'truck' and 'lorry'; avoid the AND operator, preferring proximity connectors like NEAR, WITHIN or PRE; use jargon instead of trying to anticipate all the abstract terminology that a writer might have used; and exploit any indexing available
-
Albus, W.; Smulders, H.: Doeltreffend zoeken in volledige teksten : 1. full-text retrieval bij de HavenInformatieBank (1998)
0.01
0.009384007 = product of:
0.02815202 = sum of:
0.02815202 = product of:
0.05630404 = sum of:
0.05630404 = weight(_text_:indexing in 1682) [ClassicSimilarity], result of:
0.05630404 = score(doc=1682,freq=2.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.29604656 = fieldWeight in 1682, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0546875 = fieldNorm(doc=1682)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- At Rotterdam Ports Authority in the Netherlands the Habour information database includes a press cuttings service and various online databases. To enable research staff to have direct access to information the POINT (Point Information Net) was begun in 1993. Using Verity software POINT provides simultaneously full text searching on a range of databases. The software uses current Web indexing technqiues to overcome the problems of excessive recall and low precision. A key element is the system's ability to recognise word combinations
-
Hane, P.J.: AOL acquires Personal Library Software (1998)
0.01
0.009384007 = product of:
0.02815202 = sum of:
0.02815202 = product of:
0.05630404 = sum of:
0.05630404 = weight(_text_:indexing in 1813) [ClassicSimilarity], result of:
0.05630404 = score(doc=1813,freq=2.0), product of:
0.19018644 = queryWeight, product of:
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.049684696 = queryNorm
0.29604656 = fieldWeight in 1813, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8278677 = idf(docFreq=2614, maxDocs=44218)
0.0546875 = fieldNorm(doc=1813)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- In Jan 1997 AOL annouced its acquisition of Personal Library Software, a leading developer of information indexing and search technologies, which are at the core of online a CD-ROM products from major providers such as Dow Jones and Knight Ridder. AOL is the world's leading Internet online service. Quotes the company heads concerning the advantages of the deal for searchers but reports that no specific details of its terms have been released. Outlines the history of the companies focusing on the role of Matthew Koll founder of Personal Library Software and now joining AOL and the reactions of information professionals
-
Laegreid, J.A.: SIFT: a Norwegian information retrieval system (1993)
0.01
0.008975455 = product of:
0.026926363 = sum of:
0.026926363 = product of:
0.053852726 = sum of:
0.053852726 = weight(_text_:22 in 7701) [ClassicSimilarity], result of:
0.053852726 = score(doc=7701,freq=2.0), product of:
0.17398734 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049684696 = queryNorm
0.30952093 = fieldWeight in 7701, 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=7701)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 23. 1.1999 19:22:09
-
Reinisch, F.: Wer suchet - der findet? : oder Die Überwindung der sprachlichen Grenzen bei der Suche in Volltextdatenbanken (2000)
0.01
0.008975455 = product of:
0.026926363 = sum of:
0.026926363 = product of:
0.053852726 = sum of:
0.053852726 = weight(_text_:22 in 4919) [ClassicSimilarity], result of:
0.053852726 = score(doc=4919,freq=2.0), product of:
0.17398734 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049684696 = queryNorm
0.30952093 = fieldWeight in 4919, 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=4919)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 7.2000 17:48:06
-
Zillmann, H.: OSIRIS und eLib : Information Retrieval und Search Engines in Full-text Databases (2001)
0.01
0.008975455 = product of:
0.026926363 = sum of:
0.026926363 = product of:
0.053852726 = sum of:
0.053852726 = weight(_text_:22 in 5937) [ClassicSimilarity], result of:
0.053852726 = score(doc=5937,freq=2.0), product of:
0.17398734 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049684696 = queryNorm
0.30952093 = fieldWeight in 5937, 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=5937)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 14. 6.2001 12:22:31
-
Dambeck, H.; Engler, T.: Gesucht und gefunden : Neun Volltext-Suchprogramme für den Desktop (2002)
0.01
0.008975455 = product of:
0.026926363 = sum of:
0.026926363 = product of:
0.053852726 = sum of:
0.053852726 = weight(_text_:22 in 1169) [ClassicSimilarity], result of:
0.053852726 = score(doc=1169,freq=2.0), product of:
0.17398734 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049684696 = queryNorm
0.30952093 = fieldWeight in 1169, 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=1169)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- c't. 2002, H.22, S.190-197
-
Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
0.01
0.0067315903 = product of:
0.02019477 = sum of:
0.02019477 = product of:
0.04038954 = sum of:
0.04038954 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
0.04038954 = score(doc=3564,freq=2.0), product of:
0.17398734 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049684696 = 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)
0.33333334 = coord(1/3)
- Date
- 9. 1.1996 10:22:31
