Search (143 results, page 2 of 8)

  • × theme_ss:"Verbale Doksprachen im Online-Retrieval"
  1. Voorbij, H.: ¬Een goede titel behoeft geen trefwoord, of toch wel? : een vergelijkend oderzoek titelwoorden - trefwoorden (1997) 0.01 
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    Abstract
    A recent survey at the Royal Library in the Netherlands showed that subject headings are more efficient than title keywords for retrieval purposes. 475 Dutch publications were selected at random and assigned subject headings. The study showed that subject headings provided additional useful information in 56% of titles. Subsequent searching of the library's online catalogue showed that 88% of titles were retrieved via subject headings against 57% through title keywords. Further precision may be achieved with the help of indexing staff, but at considerable cost
    Footnote
    Übers. d. Titels: A good title has no need of subject headings, or does it?: a comparative study of title keywords against subject headings
    Type
    a
  2. Wilkens, K.: Drei Sätze zur Idee einer integrierten Formal-und Sacherschließung in Datenbanken (1995) 0.01 
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    Source
    Bibliothek aktuell. 1995, H.65, S.11-13
    Type
    a
  3. Bisig, U.: OPAC und verbale Sacherschließung : ein Beitrag zur RSWK-Diskussion (1994) 0.01 
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    Source
    ABI-Technik. 14(1994) H.2, S.117-130
    Type
    a
  4. Lepsky, K.: RSWK - und was noch? : Stellungnahme zum Bericht 'Sacherschließung in Online-Katalogen' der Expertengruppe Online-Kataloge (1995) 0.01 
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    Source
    Bibliotheksdienst. 29(1995) H.3, S.500-519
    Type
    a
  5. Mu, X.; Lu, K.; Ryu, H.: Explicitly integrating MeSH thesaurus help into health information retrieval systems : an empirical user study (2014) 0.01 
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    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.
    Type
    a
  6. Chen, H.; Yim, T.; Fye, D.: Automatic thesaurus generation for an electronic community system (1995) 0.01 
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    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
    Type
    a
  7. Svenonius, E.: Präkoordination - ja oder nein? (1994) 0.01 
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    Source
    Zeitschrift für Bibliothekswesen und Bibliographie. 41(1994) H.3, S.279-294
    Type
    a
  8. Qualität in der Inhaltserschließung (2021) 0.01 
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    Editor
    Franke-Maier, M., A. Kasprzik, A. Ledl u. H. Schürmann
    Footnote
    Vgl.: https://www.degruyter.com/document/doi/10.1515/9783110691597/html. DOI: https://doi.org/10.1515/9783110691597. Rez. in: Information - Wissenschaft und Praxis 73(2022) H.2-3, S.131-132 (B. Lorenz u. V. Steyer). Weitere Rezension in: o-bib 9(20229 Nr.3. (Martin Völkl) [https://www.o-bib.de/bib/article/view/5843/8714].
  9. Wiesenmüller, H.: Schlagwortketten in Online-Katalogen : Realität und Potenzial (2008) 0.01 
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    Source
    Bibliotheksdienst. 42(2008) H.10, S.1033-1059
    Type
    a
  10. Cochrane, P.A.: Subject access in the online catalog (1982) 0.00 
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    Source
    Research libraries in OCLC: a quarterly. 5(1982), S.1-7
    Type
    a
  11. Bates, M.J.: Subject access in online catalogs: a design model (1986) 0.00 
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  12. Oberhauser, O.; Rauchbauer, P.: Sacherschließung mit RSWK im Bibos-Bibliotheksverbund (1990) 0.00 
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    Location
    A
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  13. Mischo, W.H.: ¬A subject retrieval function based on computer manipulated Library of Congress Subject Headings (1982) 0.00 
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  14. Gross, T.; Taylor, A.G.; Joudrey, D.N.: Still a lot to lose : the role of controlled vocabulary in keyword searching (2015) 0.00 
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    Abstract
    In their 2005 study, Gross and Taylor found that more than a third of records retrieved by keyword searches would be lost without subject headings. A review of the literature since then shows that numerous studies, in various disciplines, have found that a quarter to a third of records returned in a keyword search would be lost without controlled vocabulary. Other writers, though, have continued to suggest that controlled vocabulary be discontinued. Addressing criticisms of the Gross/Taylor study, this study replicates the search process in the same online catalog, but after the addition of automated enriched metadata such as tables of contents and summaries. The proportion of results that would be lost remains high.
    Type
    a
  15. Tirilly, P.; Julien, C.-A.: Random walks for subject hierarchy simplification (2012) 0.00 
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    Abstract
    Although subject hierarchies are widely used to index document collections, few tools leverage their structure to facilitate collection browsing. This is mostly due to the complexity of such structures that include thousands of nodes. This paper proposes a new approach to simplify subject hierarchies based on the distribution of documents among the nodes. A random walk algorithm simulates the route of a user within the hierarchy, under the assumption that the user is attracted by the most populated nodes. Poorly visited nodes can be identified and eliminated, leaving a structure containing only the nodes that best represent the content of the collection. Experiments on a collection indexed using the Library of Congress Subject Headings (LCSH) show that, as compared to the state-of-the-art simplification method, the random walk-based approach gives access to a larger part of the collection for the same structure size, and offers more flexibility to customize the complexity of thestructure.
    Source
    Categories, contexts and relations in knowledge organization: Proceedings of the Twelfth International ISKO Conference 6-9 August 2012, Mysore, India. Eds.: Neelameghan, A. u. K.S. Raghavan
    Type
    a
  16. Meikle, D.: Syndetic structure and OPACs : a literature review (1995) 0.00 
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    Abstract
    Attempts to gauge whether syndetic structure, the cross reference system long regarded as an integral component of the controlled vocabulary which predominates as the indexing framework for online subject searching, still has a role to play in assisting end users in their information quests. To this end, examines a number of existing and proposed enhancements to OPACs by means of a literatur review. These include: Boolean and keyword searching; online browsing; artificial intelligence; classification clustering; and hypertext. Discusses Dervin's sensemaking theories and methodologies
    Type
    a
  17. Davies, R.: Thesaurus-aided searching in search and retrieval protocols (1996) 0.00 
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    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
    Type
    a
  18. Studwell, W.E.: ¬The three camps : the present and possible future status of subject access in online catalogues (1996) 0.00 
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    Abstract
    Considers the future of LCSH and whether their viability can be maintained through a written standardization code. Until there is an online substitute for LC subject headings which has been tested on a large scale over a period of time, a successor to the present combination of LC's controlled vocabulary headings plus computerized techniques such as keyword searching is unlikely to emerge
    Type
    a
  19. Chan, L.M.: Functions of a subject authority file (1991) 0.00 
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    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
    Type
    a
  20. Julien, C.-A.; Guastavino, C.; Bouthillier, F.: Capitalizing on information organization and information visualization for a new-generation catalogue (2012) 0.00 
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    Abstract
    Subject searching is difficult with traditional text-based online public access library catalogues (OPACs), and the next-generation discovery layers are keyword searching and result filtering tools that offer little support for subject browsing. Next-generation OPACs ignore the rich network of relations offered by controlled subject vocabulary, which can facilitate subject browsing. A new generation of OPACs could leverage existing information-organization investments and offer online searchers a novel browsing and searching environment. This is a case study of the design and development of a virtual reality subject browsing and information retrieval tool. The functional prototype shows that the Library of Congress subject headings (LCSH) can be shaped into a useful and usable tree structure serving as a visual metaphor that contains a real world collection from the domain of science and engineering. Formative tests show that users can effectively browse the LCSH tree and carve it up based on their keyword search queries. This study uses a complex information-organization structure as a defining characteristic of an OPAC that goes beyond the standard keyword search model, toward the cutting edge of online search tools.
    Type
    a

Authors

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