Search (105 results, page 2 of 6)

  • × theme_ss:"Verbale Doksprachen im Online-Retrieval"
  • × type_ss:"a"
  1. Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009) 0.01 
    0.009484224 = product of:
  0.028452672 = sum of:
    0.010709076 = weight(_text_:in in 3837) [ClassicSimilarity], result of:
      0.010709076 = score(doc=3837,freq=8.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.18034597 = fieldWeight in 3837, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.046875 = fieldNorm(doc=3837)
    0.017743597 = product of:
      0.035487194 = sum of:
        0.035487194 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
          0.035487194 = score(doc=3837,freq=2.0), product of:
            0.15286934 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.043654136 = queryNorm
            0.23214069 = fieldWeight in 3837, 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=3837)
      0.5 = coord(1/2)
  0.33333334 = coord(2/6)
    Abstract
    Library of Congress Subject Headings (LSCH), which celebrated its 100th birthday in 1998, is the largest cataloging and indexing language in the world for the indication of the topics and formats of books and similar publications. It consists of a controlled list of main headings, many with subdivisions, with a rich system of cross references. It is supported by the U.S. government, and undergoes systematic revision. In recent decades its managers have begun to confront challenges such as biased terminology, complicated syntax (how terms are put together to form headings), and effective displays in electronic media. Many suggestions have been made for its improvement, including moving to a fully faceted system.
    Date
    27. 8.2011 14:22:13
  2. Chen, H.; Yim, T.; Fye, D.: Automatic thesaurus generation for an electronic community system (1995) 0.01 
    0.0069235205 = product of:
  0.020770561 = sum of:
    0.008924231 = weight(_text_:in in 2918) [ClassicSimilarity], result of:
      0.008924231 = score(doc=2918,freq=8.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.15028831 = fieldWeight in 2918, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2918)
    0.01184633 = weight(_text_:und in 2918) [ClassicSimilarity], result of:
      0.01184633 = score(doc=2918,freq=2.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.12243814 = fieldWeight in 2918, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2918)
  0.33333334 = coord(2/6)
    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
  3. Hauffe, H.: Sacherschließung bibliographischer Datenbanken und ihre Nutzung im Information Retrieval : Vortrag anläßlich der Tagung 'Automatisierte Sacherschließung - Status und Trends, Schloß Hofen, Lochau bei Bregenz, 17.4.-20.4.1989. 0.01 
    0.006701296 = product of:
  0.040207777 = sum of:
    0.040207777 = weight(_text_:und in 891) [ClassicSimilarity], result of:
      0.040207777 = score(doc=891,freq=4.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.41556883 = fieldWeight in 891, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.09375 = fieldNorm(doc=891)
  0.16666667 = coord(1/6)
  4. Mu, X.; Lu, K.; Ryu, H.: Explicitly integrating MeSH thesaurus help into health information retrieval systems : an empirical user study (2014) 0.01 
    0.00652498 = product of:
  0.01957494 = sum of:
    0.007728611 = weight(_text_:in in 2703) [ClassicSimilarity], result of:
      0.007728611 = score(doc=2703,freq=6.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.1301535 = fieldWeight in 2703, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2703)
    0.01184633 = weight(_text_:und in 2703) [ClassicSimilarity], result of:
      0.01184633 = score(doc=2703,freq=2.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.12243814 = fieldWeight in 2703, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2703)
  0.33333334 = coord(2/6)
    Abstract
    When consumers search for health information, a major obstacle is their unfamiliarity with the medical terminology. Even though medical thesauri such as the Medical Subject Headings (MeSH) and related tools (e.g., the MeSH Browser) were created to help consumers find medical term definitions, the lack of direct and explicit integration of these help tools into a health retrieval system prevented them from effectively achieving their objectives. To explore this issue, we conducted an empirical study with two systems: One is a simple interface system supporting query-based searching; the other is an augmented system with two new components supporting MeSH term searching and MeSH tree browsing. A total of 45 subjects were recruited to participate in the study. The results indicated that the augmented system is more effective than the simple system in terms of improving user-perceived topic familiarity and question-answer performance, even though we did not find users spend more time on the augmented system. The two new MeSH help components played a critical role in participants' health information retrieval and were found to allow them to develop new search strategies. The findings of the study enhanced our understanding of consumers' search behaviors and shed light on the design of future health information retrieval systems.
    Theme
    Konzeption und Anwendung des Prinzips Thesaurus
  5. Stumpf, G.: RSWK und Online-Katalog (1993) 0.01 
    0.006318042 = product of:
  0.037908252 = sum of:
    0.037908252 = weight(_text_:und in 5583) [ClassicSimilarity], result of:
      0.037908252 = score(doc=5583,freq=2.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.39180204 = fieldWeight in 5583, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.125 = fieldNorm(doc=5583)
  0.16666667 = coord(1/6)
  6. Bösing, L.: Sacherschließung im Verbund aus der Sicht einer Teilnehmerbibliothek (1990) 0.01 
    0.005528287 = product of:
  0.03316972 = sum of:
    0.03316972 = weight(_text_:und in 149) [ClassicSimilarity], result of:
      0.03316972 = score(doc=149,freq=2.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.34282678 = fieldWeight in 149, 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=149)
  0.16666667 = coord(1/6)
    Source
    Bibliothek: Forschung und Praxis. 14(1990), S.316-318
  7. Weidemüller, H.U.: Sinn und Unsinn von Ketten im OPAC (1996) 0.01 
    0.0054715853 = product of:
  0.032829512 = sum of:
    0.032829512 = weight(_text_:und in 2063) [ClassicSimilarity], result of:
      0.032829512 = score(doc=2063,freq=6.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.33931053 = fieldWeight in 2063, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.0625 = fieldNorm(doc=2063)
  0.16666667 = coord(1/6)
    Imprint
    Düsseldorf : Universitäts- und Landesbibliothek
    Series
    Schriften der Universitäts- und Landesbibliothek Düsseldorf; Bd.25
  8. Bisig, U.: Kriterien der Benutzerfreundlichkeit von Sachkatalogen : ein Überblick auf dem Hintergrund von RSWK und OPACs (1995) 0.00 
    0.003948777 = product of:
  0.02369266 = sum of:
    0.02369266 = weight(_text_:und in 2283) [ClassicSimilarity], result of:
      0.02369266 = score(doc=2283,freq=2.0), product of:
        0.09675359 = queryWeight, product of:
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.043654136 = queryNorm
        0.24487628 = fieldWeight in 2283, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.216367 = idf(docFreq=13101, maxDocs=44218)
          0.078125 = fieldNorm(doc=2283)
  0.16666667 = coord(1/6)
  9. Cochrane, P.A.: Subject access in the online catalog (1982) 0.00 
    0.003365538 = product of:
  0.020193228 = sum of:
    0.020193228 = weight(_text_:in in 2898) [ClassicSimilarity], result of:
      0.020193228 = score(doc=2898,freq=4.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.34006363 = fieldWeight in 2898, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.125 = fieldNorm(doc=2898)
  0.16666667 = coord(1/6)
    Source
    Research libraries in OCLC: a quarterly. 5(1982), S.1-7
  10. Rood, J.: Practical considerations in dealing with LCSH-mr (1991) 0.00 
    0.0030914443 = product of:
  0.018548666 = sum of:
    0.018548666 = weight(_text_:in in 2457) [ClassicSimilarity], result of:
      0.018548666 = score(doc=2457,freq=6.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.3123684 = fieldWeight in 2457, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.09375 = fieldNorm(doc=2457)
  0.16666667 = coord(1/6)
    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
  11. Mandel, C.A.: Multiple vocabularies in subject authority control (1991) 0.00 
    0.0030914443 = product of:
  0.018548666 = sum of:
    0.018548666 = weight(_text_:in in 2460) [ClassicSimilarity], result of:
      0.018548666 = score(doc=2460,freq=6.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.3123684 = fieldWeight in 2460, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.09375 = fieldNorm(doc=2460)
  0.16666667 = coord(1/6)
    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
  12. Takeda, N.: Problems in hierarchical structures in thesauri : their influences on the results of information retrieval (1994) 0.00 
    0.0029146418 = product of:
  0.01748785 = sum of:
    0.01748785 = weight(_text_:in in 2642) [ClassicSimilarity], result of:
      0.01748785 = score(doc=2642,freq=12.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.29450375 = fieldWeight in 2642, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0625 = fieldNorm(doc=2642)
  0.16666667 = coord(1/6)
    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
  13. Bates, M.J.: How to use controlled vocabularies more effectively in online searching (1989) 0.00 
    0.0027546515 = product of:
  0.016527908 = sum of:
    0.016527908 = weight(_text_:in in 2883) [ClassicSimilarity], result of:
      0.016527908 = score(doc=2883,freq=14.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.27833787 = fieldWeight in 2883, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2883)
  0.16666667 = coord(1/6)
    Abstract
    Optimal retrieval in on-line searching can be achieved through combined use of both natural language and controlled vocabularies. However, there is a large variety of types of controlled vocabulary in data bases and often more than one in a single data base. Optimal use of these vocabularies requires understanding what types of languages are involved, and taking advantage of the particular mix of vocabularies in a given data base. Examples 4 major types of indexing and classification used in data bases and puts these 4 in the context of 3 other approaches to subject access. Discusses how to evaluate a new data base for various forms of subject access.
  14. Bates, M.J.: How to use controlled vocabularies more effectively in online searching (1989) 0.00 
    0.0027546515 = product of:
  0.016527908 = sum of:
    0.016527908 = weight(_text_:in in 207) [ClassicSimilarity], result of:
      0.016527908 = score(doc=207,freq=14.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.27833787 = fieldWeight in 207, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0546875 = fieldNorm(doc=207)
  0.16666667 = coord(1/6)
    Abstract
    Optimal retrieval in on-line searching can be achieved through combined use of both natural language and controlled vocabularies. However, there is a large variety of types of controlled vocabulary in data bases and often more than one in a single data base. Optimal use of these vocabularies requires understanding what types of languages are involved, and taking advantage of the particular mix of vocabularies in a given data base. Examples 4 major types of indexing and classification used in data bases and puts these 4 in the context of 3 other approaches to subject access. Discusses how to evaluate a new data base for various forms of subject access.
  15. Nicholson, J.; Lake, S.: Implementation of FAST in two digital repositories : breaking silos, unifying subject practices (2023) 0.00 
    0.0027546515 = product of:
  0.016527908 = sum of:
    0.016527908 = weight(_text_:in in 1174) [ClassicSimilarity], result of:
      0.016527908 = score(doc=1174,freq=14.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.27833787 = fieldWeight in 1174, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1174)
  0.16666667 = coord(1/6)
    Abstract
    This study traces evolving approaches to the use of the FAST (Faceted Application of Subject Terminology) in digital repositories at Atkins Library at the University of North Carolina at Charlotte, where changes in staffing, the launch of an institutional repository, and efforts to address problematic language in metadata have necessitated a shift from an in-depth indexing approach to FAST to a lightweight "tagging" model more suited to present-day metadata needs. Despite the subject schema's apparent simplicity, Atkins' experience with FAST has shown that it still requires significant time, effort, and experimentation in order to deploy it to best effect.
    Footnote
    Beitrag in Themenheft: Implementation of Faceted Vocabularies.
  16. Svenonius, E.: Design of controlled vocabularies in the context of emerging technologies (1988) 0.00 
    0.0026606917 = product of:
  0.01596415 = sum of:
    0.01596415 = weight(_text_:in in 762) [ClassicSimilarity], result of:
      0.01596415 = score(doc=762,freq=10.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.26884392 = fieldWeight in 762, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0625 = fieldNorm(doc=762)
  0.16666667 = coord(1/6)
    Abstract
    Delineates on the changing role of vocabulary control devices such as classification, subject headings, and thesaurus. Identifies the basic issue in the design and development of these devices and their role in the changing information technology. The paper identifies the differentiations needed in the new roles of these devices in data base technology
  17. Garrison, W.A.: Practical considerations in using the machine-readable LCSH (1991) 0.00 
    0.0025762038 = product of:
  0.015457222 = sum of:
    0.015457222 = weight(_text_:in in 2458) [ClassicSimilarity], result of:
      0.015457222 = score(doc=2458,freq=6.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.260307 = fieldWeight in 2458, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.078125 = fieldNorm(doc=2458)
  0.16666667 = coord(1/6)
    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
  18. Bishoff, L.: Public access to the Library of Congress Subject Headings online (1991) 0.00 
    0.0025762038 = product of:
  0.015457222 = sum of:
    0.015457222 = weight(_text_:in in 2459) [ClassicSimilarity], result of:
      0.015457222 = score(doc=2459,freq=6.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.260307 = fieldWeight in 2459, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.078125 = fieldNorm(doc=2459)
  0.16666667 = coord(1/6)
    Footnote
    Enthält eine Liste von Fragen zum Ungang mit LCSH in einem Online-Katalog
    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
  19. Dykstra, M.: PRECIS in the online catalog (1989) 0.00 
    0.0025241538 = product of:
  0.015144923 = sum of:
    0.015144923 = weight(_text_:in in 454) [ClassicSimilarity], result of:
      0.015144923 = score(doc=454,freq=4.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.25504774 = fieldWeight in 454, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.09375 = fieldNorm(doc=454)
  0.16666667 = coord(1/6)
    Footnote
    Simultaneously published as Subject Control in Online Catalogs
  20. Bates, M.J.: Rethinking subject cataloging in the online environment (1989) 0.00 
    0.0023797948 = product of:
  0.014278769 = sum of:
    0.014278769 = weight(_text_:in in 119) [ClassicSimilarity], result of:
      0.014278769 = score(doc=119,freq=2.0), product of:
        0.059380736 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.043654136 = queryNorm
        0.24046129 = fieldWeight in 119, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.125 = fieldNorm(doc=119)
  0.16666667 = coord(1/6)

Authors

Years

Languages

  • e 82
  • d 19
  • nl 2
  • f 1
  • ja 1
  • More… Less…

Themes