Search (9 results, page 1 of 1)

0.07710224 = product of:
  0.19275558 = sum of:
    0.13708933 = weight(_text_:thesaurus in 3734) [ClassicSimilarity], result of:
      0.13708933 = score(doc=3734,freq=4.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.5776348 = fieldWeight in 3734, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0625 = fieldNorm(doc=3734)
    0.055666253 = weight(_text_:22 in 3734) [ClassicSimilarity], result of:
      0.055666253 = score(doc=3734,freq=2.0), product of:
        0.1798465 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.051357865 = queryNorm
        0.30952093 = fieldWeight in 3734, 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=3734)
  0.4 = coord(2/5)

Abstract

Most indexed databases now include their thesauri and/or coding in their bibliographic files, searchable at the databases' online connect rates. Assesses the searchability of these on the different hosts. Thesauri and classifications are also available as diskette or CD-ROM products. Describes a number of these, highlighting the diskette thesaurus from IFI/Plenum Data for its flexible databases, the CLAIMS Uniterm and Comprehensive indexes to US chemical patents

Source

Searcher. 3(1995) no.8, S.18-22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

0.043351453 = product of:
  0.21675727 = sum of:
    0.21675727 = weight(_text_:thesaurus in 5169) [ClassicSimilarity], result of:
      0.21675727 = score(doc=5169,freq=10.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.91332084 = fieldWeight in 5169, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0625 = fieldNorm(doc=5169)
  0.2 = coord(1/5)

Abstract

Open system protocols for search and retrieval have not provided explicit ways in which to implement thesaurus-aided searching. A number of different approaches within the existing protocols, as well as a proposed service, are evaluated. A general approach to implementing thesaurus-aided searching, particularly during consultation of a thesaurus, requires an entirely new service, whose main features are described

Theme

Konzeption und Anwendung des Prinzips Thesaurus

0.03815076 = product of:
  0.0953769 = sum of:
    0.06058549 = weight(_text_:thesaurus in 2337) [ClassicSimilarity], result of:
      0.06058549 = score(doc=2337,freq=2.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.2552809 = fieldWeight in 2337, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2337)
    0.03479141 = weight(_text_:22 in 2337) [ClassicSimilarity], result of:
      0.03479141 = score(doc=2337,freq=2.0), product of:
        0.1798465 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.051357865 = queryNorm
        0.19345059 = fieldWeight in 2337, 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=2337)
  0.4 = coord(2/5)

Date

22. 9.1997 19:16:05

Theme

Konzeption und Anwendung des Prinzips Thesaurus

0.032058835 = product of:
  0.16029418 = sum of:
    0.16029418 = weight(_text_:thesaurus in 2918) [ClassicSimilarity], result of:
      0.16029418 = score(doc=2918,freq=14.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.6754099 = fieldWeight in 2918, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2918)
  0.2 = coord(1/5)

Abstract

Reports an algorithmic approach to the automatic generation of thesauri for electronic community systems. The techniques used included terms filtering, automatic indexing, and cluster analysis. The testbed for the research was the Worm Community System, which contains a comprehensive library of specialized community data and literature, currently in use by molecular biologists who study the nematode worm. The resulting worm thesaurus included 2709 researchers' names, 798 gene names, 20 experimental methods, and 4302 subject descriptors. On average, each term had about 90 weighted neighbouring terms indicating relevant concepts. The thesaurus was developed as an online search aide. Tests the worm thesaurus in an experiment with 6 worm researchers of varying degrees of expertise and background. The experiment showed that the thesaurus was an excellent 'memory jogging' device and that it supported learning and serendipitous browsing. Despite some occurrences of obvious noise, the system was useful in suggesting relevant concepts for the researchers' queries and it helped improve concept recall. With a simple browsing interface, an automatic thesaurus can become a useful tool for online search and can assist researchers in exploring and traversing a dynamic and complex electronic community system

Theme

Konzeption und Anwendung des Prinzips Thesaurus

0.019387359 = product of:
  0.09693679 = sum of:
    0.09693679 = weight(_text_:thesaurus in 2642) [ClassicSimilarity], result of:
      0.09693679 = score(doc=2642,freq=2.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.40844947 = fieldWeight in 2642, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0625 = fieldNorm(doc=2642)
  0.2 = coord(1/5)

Abstract

In online retrieval search results do not always match the intent in spite of using correct keywords (descriptors). One of the causes of this problem is found in the hierarchical structures of the thesaurus, which often contains relations between broader and narrower concepts, the opposite of which is not necessarily true. Some examples are described from 2 thesauri, MeSH and JICST. In these cases searchers need to make an effort to increase precision

0.01696394 = product of:
  0.0848197 = sum of:
    0.0848197 = weight(_text_:thesaurus in 2249) [ClassicSimilarity], result of:
      0.0848197 = score(doc=2249,freq=2.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.3573933 = fieldWeight in 2249, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2249)
  0.2 = coord(1/5)

Abstract

Contribution to the ongoing debate on the French subject headings list RAMEAU, which has been much criticised as time consuming and inflexible. Proposed technical solutions to recurring problems with complex syntax, strucutre of hierarchical and associative links, and rigity of language are discussed, in the context of computerised cataloguing and retrieval using OPACs. As a universal indexing language RAMEAU is more appropriate for medium sized specialised libraries and specialist researchers. However the 2 possible subject indexing techniques, linguistic treatment of whole text and thesaurus, are now beginning to be viewed as complementary approaches

0.014540519 = product of:
  0.072702594 = sum of:
    0.072702594 = weight(_text_:thesaurus in 2215) [ClassicSimilarity], result of:
      0.072702594 = score(doc=2215,freq=2.0), product of:
        0.23732872 = queryWeight, product of:
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.051357865 = queryNorm
        0.30633712 = fieldWeight in 2215, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.6210785 = idf(docFreq=1182, maxDocs=44218)
          0.046875 = fieldNorm(doc=2215)
  0.2 = coord(1/5)

Footnote

Rez. in: Canadian library journal 49(1992) S.166 (P. Nicholls): "Basically a collection of the proceedings of a program given at the ALA's 1987 annual conference, the original impetus for the session was to familarize bibliographic utilities, library systems staff, and integrated library system vendors with the recently-released machine-readable LCSH-mr so that they could "integrate this new tool into online bibliographic systems to provide the cataloging, thesaurus maintenance, file maintenance, and retrieval functions associated with subject authority work." These papers were writeen in 1986 and are all about LCSH on magnetic tape. Gads!

0.009741595 = product of:
  0.048707973 = sum of:
    0.048707973 = weight(_text_:22 in 7238) [ClassicSimilarity], result of:
      0.048707973 = score(doc=7238,freq=2.0), product of:
        0.1798465 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.051357865 = queryNorm
        0.2708308 = fieldWeight in 7238, 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=7238)
  0.2 = coord(1/5)

Date

22. 4.1997 20:43:23

0.006888348 = product of:
  0.03444174 = sum of:
    0.03444174 = weight(_text_:22 in 4360) [ClassicSimilarity], result of:
      0.03444174 = score(doc=4360,freq=4.0), product of:
        0.1798465 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.051357865 = queryNorm
        0.19150631 = fieldWeight in 4360, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.02734375 = fieldNorm(doc=4360)
  0.2 = coord(1/5)

Date

15. 7.2018 16:22:16

Footnote

Rez. in: Mitteilungen VÖB 48(1995) H.1, S.66-68 (K. Niedermair) - Vgl. auch Lepsky, K. in: Bibliotheksdienst 29(1995) H.3, S.500-519; Bibliothek: Forschung u. Praxis 19(1995) H.2, S.251-254 (G. Hartwieg; auch in: LDV-Forum Bd. 12, Nr. 2, Jg. 1995, S.22-29 [unter: http://www.jlcl.org/1995_Heft2/Rezensionen_19-27.pdf]) .