Search (69 results, page 1 of 4)

  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  • × year_i:[1990 TO 2000}
  1. Poynder, R.: Web research engines? (1996) 0.07 
    0.0688876 = product of:
  0.103331394 = sum of:
    0.03822265 = weight(_text_:im in 5698) [ClassicSimilarity], result of:
      0.03822265 = score(doc=5698,freq=4.0), product of:
        0.1442303 = queryWeight, product of:
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.051022716 = queryNorm
        0.26501122 = fieldWeight in 5698, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.046875 = fieldNorm(doc=5698)
    0.06510875 = product of:
      0.09766311 = sum of:
        0.04405792 = weight(_text_:online in 5698) [ClassicSimilarity], result of:
          0.04405792 = score(doc=5698,freq=4.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.284522 = fieldWeight in 5698, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.046875 = fieldNorm(doc=5698)
        0.05360519 = weight(_text_:retrieval in 5698) [ClassicSimilarity], result of:
          0.05360519 = score(doc=5698,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.34732026 = fieldWeight in 5698, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.046875 = fieldNorm(doc=5698)
      0.6666667 = coord(2/3)
  0.6666667 = coord(2/3)
    Theme
    Verbale Doksprachen im Online-Retrieval
    Klassifikationssysteme im Online-Retrieval
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Järvelin, K.; Niemi, T.: Deductive information retrieval based on classifications (1993) 0.06 
    0.062621735 = product of:
  0.0939326 = sum of:
    0.027027493 = weight(_text_:im in 2229) [ClassicSimilarity], result of:
      0.027027493 = score(doc=2229,freq=2.0), product of:
        0.1442303 = queryWeight, product of:
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.051022716 = queryNorm
        0.18739122 = fieldWeight in 2229, 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=2229)
    0.0669051 = product of:
      0.10035765 = sum of:
        0.031153653 = weight(_text_:online in 2229) [ClassicSimilarity], result of:
          0.031153653 = score(doc=2229,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.20118743 = fieldWeight in 2229, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.046875 = fieldNorm(doc=2229)
        0.069204 = weight(_text_:retrieval in 2229) [ClassicSimilarity], result of:
          0.069204 = score(doc=2229,freq=10.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.44838852 = fieldWeight in 2229, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.046875 = fieldNorm(doc=2229)
      0.6666667 = coord(2/3)
  0.6666667 = coord(2/3)
    Abstract
    Modern fact databses contain abundant data classified through several classifications. Typically, users msut consult these classifications in separate manuals or files, thus making their effective use difficult. Contemporary database systems do little support deductive use of classifications. In this study we show how deductive data management techniques can be applied to the utilization of data value classifications. Computation of transitive class relationships is of primary importance here. We define a representation of classifications which supports transitive computation and present an operation-oriented deductive query language tailored for classification-based deductive information retrieval. The operations of this language are on the same abstraction level as relational algebra operations and can be integrated with these to form a powerful and flexible query language for deductive information retrieval. We define the integration of these operations and demonstrate the usefulness of the language in terms of several sample queries
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
    Klassifikationssysteme im Online-Retrieval
  3. Gödert, W.; Lepsky, K.: Semantische Umfeldsuche im Information Retrieval (1998) 0.06 
    0.059869885 = product of:
  0.08980483 = sum of:
    0.031532075 = weight(_text_:im in 606) [ClassicSimilarity], result of:
      0.031532075 = score(doc=606,freq=2.0), product of:
        0.1442303 = queryWeight, product of:
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.051022716 = queryNorm
        0.2186231 = fieldWeight in 606, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.0546875 = fieldNorm(doc=606)
    0.05827275 = product of:
      0.087409124 = sum of:
        0.03634593 = weight(_text_:online in 606) [ClassicSimilarity], result of:
          0.03634593 = score(doc=606,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.23471867 = fieldWeight in 606, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=606)
        0.05106319 = weight(_text_:retrieval in 606) [ClassicSimilarity], result of:
          0.05106319 = score(doc=606,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.33085006 = fieldWeight in 606, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=606)
      0.6666667 = coord(2/3)
  0.6666667 = coord(2/3)
    Abstract
    Sachliche Suchen in bibliothekarischen Online-Katalogen enden häufig mit unbefriedigenden Ergebnissen. Als eine Ursache dafür kann angesehen werden, daß die Gestaltung des Suchprozesses das semantische Umfeld einer Suchanfrage nicht mit einbezieht, daß in Übertragung der Verhältnisse in konventionellen Katalogen am Paradigma des Wort-Matching zwischen Suchwort und Indexat festgehalten wird. Es wird statt dessen das Konzept einer semantischen Umfeldsuche entwickelt und gezeigt, welche Rolle die Verwendung strukturierten Vokabulars dafür spielen kann. Insbesondere wird dargestellt, welche Möglichkeiten Verfahren der wörterbuchgestützten maschinellen Indexierung in diesem Zusammenhang spielen können. Die Ausführungen werden durch Beispiele illustriert
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  4. Fieldhouse, M.; Hancock-Beaulieu, M.: ¬The design of a graphical user interface for a highly interactive information retrieval system (1996) 0.06 
    0.055158015 = product of:
  0.16547404 = sum of:
    0.16547404 = sum of:
      0.03634593 = weight(_text_:online in 6958) [ClassicSimilarity], result of:
        0.03634593 = score(doc=6958,freq=2.0), product of:
          0.1548489 = queryWeight, product of:
            3.0349014 = idf(docFreq=5778, maxDocs=44218)
            0.051022716 = queryNorm
          0.23471867 = fieldWeight in 6958, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.0349014 = idf(docFreq=5778, maxDocs=44218)
            0.0546875 = fieldNorm(doc=6958)
      0.080738 = weight(_text_:retrieval in 6958) [ClassicSimilarity], result of:
        0.080738 = score(doc=6958,freq=10.0), product of:
          0.15433937 = queryWeight, product of:
            3.024915 = idf(docFreq=5836, maxDocs=44218)
            0.051022716 = queryNorm
          0.5231199 = fieldWeight in 6958, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            3.024915 = idf(docFreq=5836, maxDocs=44218)
            0.0546875 = fieldNorm(doc=6958)
      0.048390117 = weight(_text_:22 in 6958) [ClassicSimilarity], result of:
        0.048390117 = score(doc=6958,freq=2.0), product of:
          0.17867287 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.051022716 = queryNorm
          0.2708308 = fieldWeight in 6958, 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=6958)
  0.33333334 = coord(1/3)
    Abstract
    Reports on the design of a GUI for the Okapi 'best match' retrieval system developed at the Centre for Interactive Systems Research, City University, UK, for online library catalogues. The X-Windows interface includes an interactive query expansion (IQE) facilty which involves the user in the selection of query terms to reformulate a search. Presents the design rationale, based on a game board metaphor, and describes the features of each of the stages of the search interaction. Reports on the early operational field trial and discusses relevant evaluation issues and objectives
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  5. Rudolph, S.; Hemmje, M.: Visualisierung von Thesauri zur interaktiven Unterstüzung von visuellen Anfragen an Textdatenbanken (1994) 0.03 
    0.033139206 = product of:
  0.04970881 = sum of:
    0.022522911 = weight(_text_:im in 2382) [ClassicSimilarity], result of:
      0.022522911 = score(doc=2382,freq=2.0), product of:
        0.1442303 = queryWeight, product of:
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.051022716 = queryNorm
        0.15615936 = fieldWeight in 2382, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2382)
    0.027185898 = product of:
      0.08155769 = sum of:
        0.08155769 = weight(_text_:retrieval in 2382) [ClassicSimilarity], result of:
          0.08155769 = score(doc=2382,freq=20.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.5284309 = fieldWeight in 2382, product of:
              4.472136 = tf(freq=20.0), with freq of:
                20.0 = termFreq=20.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2382)
      0.33333334 = coord(1/3)
  0.6666667 = coord(2/3)
    Abstract
    In der folgenden Studie wird eine Komponente für eine visuelle Benutzerschnittstelle zu Textdatenbanken entworfen. Mit Hilfe einer Terminologievisualisierung wird dem Benutzer eine Hilfestellung bei der Relevanzbewertung von Dokumenten und bei der Erweiterung seiner visuellen Anfrage an das Retrieval-System gegeben. Dazu werden zuerst die grundlegenden Information-Retrieval-Modelle eingehender vorgestellt, d.h., generelle Retrieval-Modelle, Retrievaloperationen und spezielle Retrieval-Modelle wie Text-Retrieval werden erläutert. Die Funktionalität eines Text-Retrieval-Systems wird vorgestellt. Darüber hinaus werden bereits existierende Implementierungen visueller Information-Retrieval-Benutzerschnittstellen vorgestellt. Im weiteren Verlauf der Arbeit werden mögliche Visualisierungen der mit Hilfe eines Text-Retrieval-Systems gefundenen Dokumente aufgezeigt. Es werden mehrere Vorschläge zur Visualisierung von Thesauri diskutiert. Es wird gezeigt, wie neuronale Netze zur Kartierung eines Eingabebereiches benutzt werden können. Klassifikationsebenen einer objekt-orientierten Annäherung eines Information-Retrieval-Systems werden vorgestellt. In diesem Zusammenhang werden auch die Eigenschaften von Thesauri sowie die Architektur und Funktion eines Parsersystems erläutert. Mit diesen Voraussetzung wird die Implementierung einer visuellen Terminologierunterstützung realisiert. Abschließend wird ein Fazit zur vorgestellten Realisierung basierend auf einem Drei-Schichten-Modell von [Agosti et al. 1990] gezogen.
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  6. Hancock-Beaulieu, M.: Query expansion : advances in research in online catalogues (1992) 0.03 
    0.027780332 = product of:
  0.083340995 = sum of:
    0.083340995 = product of:
      0.12501149 = sum of:
        0.07342987 = weight(_text_:online in 2351) [ClassicSimilarity], result of:
          0.07342987 = score(doc=2351,freq=4.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.47420335 = fieldWeight in 2351, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.078125 = fieldNorm(doc=2351)
        0.051581617 = weight(_text_:retrieval in 2351) [ClassicSimilarity], result of:
          0.051581617 = score(doc=2351,freq=2.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.33420905 = fieldWeight in 2351, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.078125 = fieldNorm(doc=2351)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    Query expansion is the process of supplementing or replacing the original query terms with additional terms either at the search formulation or search reformulation stages. Different approaches to implementing query expansion are considered in three online catalogs
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  7. Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990) 0.03 
    0.027748927 = product of:
  0.08324678 = sum of:
    0.08324678 = product of:
      0.12487017 = sum of:
        0.051922753 = weight(_text_:online in 1816) [ClassicSimilarity], result of:
          0.051922753 = score(doc=1816,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.33531237 = fieldWeight in 1816, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.078125 = fieldNorm(doc=1816)
        0.07294742 = weight(_text_:retrieval in 1816) [ClassicSimilarity], result of:
          0.07294742 = score(doc=1816,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.47264296 = fieldWeight in 1816, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.078125 = fieldNorm(doc=1816)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  8. Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬An evaluation of interactive query expansion in an online library catalogue with a graphical user interface (1995) 0.03 
    0.025320066 = product of:
  0.0759602 = sum of:
    0.0759602 = product of:
      0.11394029 = sum of:
        0.051400907 = weight(_text_:online in 1666) [ClassicSimilarity], result of:
          0.051400907 = score(doc=1666,freq=4.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.33194235 = fieldWeight in 1666, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1666)
        0.062539384 = weight(_text_:retrieval in 1666) [ClassicSimilarity], result of:
          0.062539384 = score(doc=1666,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.40520695 = fieldWeight in 1666, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1666)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    An online library catalogue served as a testbed to evaluate an interactive query expansion facility based on relevance feedback for the Okapi probabilistic term weighting retrieval system. The facility was implemented in a graphical user interface (GUI) environment using a game-board metaphor for the search process, and allowed searchers to select candidate terms extracted from relevant retrieved itms to reformulate queries. The take-up of the interactive query expansion option was found to be lower, and its retrieval performance less effective, compared to previous tests featuring automatic query expansion. Contributory factors including the number, presentation and source of terms are discussed
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  9. Hancock-Beaulieu, M.: Evaluating the impact of an online library catalogue on subject searching behaviour at the catalogue and at the shelves (1990) 0.02 
    0.022827204 = product of:
  0.06848161 = sum of:
    0.06848161 = product of:
      0.10272241 = sum of:
        0.05805141 = weight(_text_:online in 5691) [ClassicSimilarity], result of:
          0.05805141 = score(doc=5691,freq=10.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.37489069 = fieldWeight in 5691, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5691)
        0.04467099 = weight(_text_:retrieval in 5691) [ClassicSimilarity], result of:
          0.04467099 = score(doc=5691,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.28943354 = fieldWeight in 5691, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5691)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    The second half of a 'before and after' study to evaluate the impact of an online catalogue on subject searching behaviour is reported. A holistic approach is adopted encompassing both catalogue use and browsing at the shelves for catalogue users and non-users. Verbal and non-verbal data were elicited from searchers using a combined methodology including talk-aloud technique, observation and a screen logging facility. An extensive qualitative analysis was carried out correlating expressed topics, search formulation strategies and documents retrieved at the shelves. The online catalogue environment does not appear to have increased the extent of subject searching nor the use of the bibliographic tool. The manual PRECIS index supported a contextual approach for broad and more interactive search formulations whereas the OPAC encouraged a matching approach and narrow formulations with fewer but user generated formulations. The success rate of the online catalogue was slightly better than that of the manual tools but fewer items were retrieved at the shelves. Non-users of the bibliographic tools seemed to be just as successful. To improve retrieval effectiveness it is suggested that online catalogues should cater for both matching and contextual approaches to searching. Recent research indicates that a more interactive process could be promoted by providing query expansion through a combination of searching aids for matching, for search formulation assistance and for structured contextual retrieval
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  10. Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬A graphical interface for OKAPI : the design and evaluation of an online catalogue system with direct manipulation interaction for subject access (1994) 0.02 
    0.0227698 = product of:
  0.0683094 = sum of:
    0.0683094 = product of:
      0.102464095 = sum of:
        0.051400907 = weight(_text_:online in 1318) [ClassicSimilarity], result of:
          0.051400907 = score(doc=1318,freq=4.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.33194235 = fieldWeight in 1318, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1318)
        0.05106319 = weight(_text_:retrieval in 1318) [ClassicSimilarity], result of:
          0.05106319 = score(doc=1318,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.33085006 = fieldWeight in 1318, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1318)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    A project to design a graphical user interface for the OKAPI online catalogue search system which uses the basic term weighting probabilistic search engine. Presents a research context of the project with a discussion of interface and functionality issues relating to the design of OPACs. Describes the design methodology and evaluation methodology. Presents the preliminary results of the field trial evaluation. Considers problems encountered in the field trial and discusses contributory factors to the effectiveness of interactive query expansion. Highlights the tension between usability and functionality in highly interactive retrieval and suggests further areas of research
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  11. Walker, S.: Subject access in online catalogues (1991) 0.02 
    0.022199143 = product of:
  0.066597424 = sum of:
    0.066597424 = product of:
      0.09989613 = sum of:
        0.0415382 = weight(_text_:online in 5690) [ClassicSimilarity], result of:
          0.0415382 = score(doc=5690,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.2682499 = fieldWeight in 5690, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
        0.058357935 = weight(_text_:retrieval in 5690) [ClassicSimilarity], result of:
          0.058357935 = score(doc=5690,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.37811437 = fieldWeight in 5690, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    Discusses some of the methods of subject access to on-line catalohues (OPACs) and argues that none are entirley satisfactory. Describes 2 methods for improving subject access: best match searching; and automatic query expansion application and discusses their feasibility. Mentions emerging application standards for information retrieval and concludes that existing standards are incompatible with most methods for improving standards
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  12. Gödert, W.: Inhaltliche Dokumenterschließung, Information Retrieval und Navigation in Informationsräumen (1995) 0.02 
    0.022199143 = product of:
  0.066597424 = sum of:
    0.066597424 = product of:
      0.09989613 = sum of:
        0.0415382 = weight(_text_:online in 4438) [ClassicSimilarity], result of:
          0.0415382 = score(doc=4438,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.2682499 = fieldWeight in 4438, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0625 = fieldNorm(doc=4438)
        0.058357935 = weight(_text_:retrieval in 4438) [ClassicSimilarity], result of:
          0.058357935 = score(doc=4438,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.37811437 = fieldWeight in 4438, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0625 = fieldNorm(doc=4438)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    Examines the advantages and disadvantages of precoordinated, postcoordinated and automatic indexing with regard to existing information storage systems, such as card catalogues, OPACs, CR-ROM databases, and online databases. Presents a general model of document content representation and concludes that the library profession needs to address the development of databank design models, relevance feedback methods and automatic indexing assessment methods, to make indexing more effective
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  13. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.02 
    0.022100737 = product of:
  0.06630221 = sum of:
    0.06630221 = product of:
      0.09945331 = sum of:
        0.05106319 = weight(_text_:retrieval in 1319) [ClassicSimilarity], result of:
          0.05106319 = score(doc=1319,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.33085006 = fieldWeight in 1319, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1319)
        0.048390117 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
          0.048390117 = score(doc=1319,freq=2.0), product of:
            0.17867287 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051022716 = queryNorm
            0.2708308 = fieldWeight in 1319, 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=1319)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Date
    1. 8.1996 22:08:06
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  14. Shapiro, C.D.; Yan, P.-F.: Generous tools : thesauri in digital libraries (1996) 0.02 
    0.021974515 = product of:
  0.06592354 = sum of:
    0.06592354 = product of:
      0.09888531 = sum of:
        0.03634593 = weight(_text_:online in 3132) [ClassicSimilarity], result of:
          0.03634593 = score(doc=3132,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.23471867 = fieldWeight in 3132, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3132)
        0.062539384 = weight(_text_:retrieval in 3132) [ClassicSimilarity], result of:
          0.062539384 = score(doc=3132,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.40520695 = fieldWeight in 3132, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3132)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    The Electronic Libraries and Information Highways MITRE Sponsored Research project aims to help searchers working in digital libraries increase their chance of matching the language of authors. Focuses on whether query formulation can be improved through the addition of semantic knowledge that is interactively gathered from a thesaurus that exists in a distributed, interoperating, cooperative environment. A prototype, ELVIS, was built that improves information retrieval through query expansion and is based on publicly available Z39.50 standard thesauri integrated with networked information discovery and retrieval tools
    Source
    Proceedings of the 17th National Online Meeting 1996, New York, 14-16 May 1996. Ed.: M.E. Williams
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  15. Robertson, S.E.: OKAPI at TREC-3 (1995) 0.02 
    0.021974515 = product of:
  0.06592354 = sum of:
    0.06592354 = product of:
      0.09888531 = sum of:
        0.03634593 = weight(_text_:online in 5694) [ClassicSimilarity], result of:
          0.03634593 = score(doc=5694,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.23471867 = fieldWeight in 5694, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5694)
        0.062539384 = weight(_text_:retrieval in 5694) [ClassicSimilarity], result of:
          0.062539384 = score(doc=5694,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.40520695 = fieldWeight in 5694, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5694)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    Reports text information retrieval experiments performed as part of the 3 rd round of Text Retrieval Conferences (TREC) using the Okapi online catalogue system at City University, UK. The emphasis in TREC-3 was: further refinement of term weighting functions; an investigation of run time passage determination and searching; expansion of ad hoc queries by terms extracted from the top documents retrieved by a trial search; new methods for choosing query expansion terms after relevance feedback, now split into methods of ranking terms prior to selection and subsequent selection procedures; and the development of a user interface procedure within the new TREC interactive search framework
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  16. Otto, A.: Ordnungssysteme als Wissensbasis für die Suche in textbasierten Datenbeständen : dargestellt am Beispiel einer soziologischen Bibliographie (1998) 0.02 
    0.021572879 = product of:
  0.032359317 = sum of:
    0.025481766 = weight(_text_:im in 6625) [ClassicSimilarity], result of:
      0.025481766 = score(doc=6625,freq=4.0), product of:
        0.1442303 = queryWeight, product of:
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.051022716 = queryNorm
        0.17667414 = fieldWeight in 6625, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          2.8267863 = idf(docFreq=7115, maxDocs=44218)
          0.03125 = fieldNorm(doc=6625)
    0.006877549 = product of:
      0.020632647 = sum of:
        0.020632647 = weight(_text_:retrieval in 6625) [ClassicSimilarity], result of:
          0.020632647 = score(doc=6625,freq=2.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.13368362 = fieldWeight in 6625, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.03125 = fieldNorm(doc=6625)
      0.33333334 = coord(1/3)
  0.6666667 = coord(2/3)
    Abstract
    Es wird eine Methode vorgestellt, wie sich Ordnungssysteme für die Suche in textbasierten Datenbeständen verwenden lassen. "Ordnungssystem" wird hier als Oberbegriff für beliebige geordnete Begriffssammlungen verwendet. Dies sind beispielsweise Thesauri, Klassifikationen und formale Systematiken. Weil Thesauri dabei die leistungsfähigsten Ordnungssysteme sind, finden sie eine besondere Berücksichtigung. Der Beitrag ist streng praxisbezogenen und auf die Nutzerschnittstelle konzentriert. Die Basis für die Nutzerschnittstelle bilden Ordnungssysteme, die über eine WWW-Schnittstelle angeboten werden. Je nach Fachgebiet kann der Nutzer ein spezielles Ordnungssystem für die Suche auswählen. Im Unterschied zu klassischen Verfahren werden die Ordnungssysteme nicht zur ausschließlichen Suche in Deskriptorenfeldern, sondern für die Suche in einem Basic Index verwendet. In der Anwendung auf den Basic Index sind die Ordnungssysteme quasi "entkoppelt" von der ursprünglichen Datenbank und den Deskriptorenfeldern, für die das Ordnungssystem entwickelt wurde. Die Inhalte einer Datenbank spielen bei der Wahl der Ordnungssysteme zunächst keine Rolle. Sie machen sich erst bei der Suche in der Anzahl der Treffer bemerkbar: so findet ein rechtswissenschaftlicher Thesaurus natürlicherweise in einer Medizin-Datenbank weniger relevante Dokumente als in einer Rechts-Datenbank, weil das im Rechts-Thesaurus abgebildete Begriffsgut eher in einer Rechts-Datenbank zu finden ist. Das Verfahren ist modular aufgebaut und sieht in der Konzeption nachgeordnete semantische Retrievalverfahren vor, die zu einer Verbesserung von Retrievaleffektivität und -effizienz führen werden. So werden aus einer Ergebnismenge, die ausschließlich durch exakten Zeichenkettenabgleich gefunden wurde, in einem nachfolgenden Schritt durch eine semantische Analyse diejenigen Dokumente herausgefiltert, die für die Suchfrage relevant sind. Die WWW-Nutzerschnittstelle und die Verwendung bereits bestehender Ordnungssysteme führen zu einer Minimierung des Arbeitsaufwands auf Nutzerseite. Die Kosten für eine Suche lassen sich sowohl auf der Input-Seite verringern, indem eine aufwendige "manuelle" Indexierung entfällt, als auch auf der Output-Seite, indem den Nutzern leicht bedienbare Suchoptionen zur Verfügung gestellt werden
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  17. Efthimiadis, E.N.: End-users' understanding of thesaural knowledge structures in interactive query expansion (1994) 0.02 
    0.02145962 = product of:
  0.06437886 = sum of:
    0.06437886 = product of:
      0.09656829 = sum of:
        0.041265294 = weight(_text_:retrieval in 5693) [ClassicSimilarity], result of:
          0.041265294 = score(doc=5693,freq=2.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.26736724 = fieldWeight in 5693, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0625 = fieldNorm(doc=5693)
        0.055302992 = weight(_text_:22 in 5693) [ClassicSimilarity], result of:
          0.055302992 = score(doc=5693,freq=2.0), product of:
            0.17867287 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051022716 = queryNorm
            0.30952093 = fieldWeight in 5693, 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=5693)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Date
    30. 3.2001 13:35:22
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  18. Järvelin, K.; Kristensen, J.; Niemi, T.; Sormunen, E.; Keskustalo, H.: ¬A deductive data model for query expansion (1996) 0.02 
    0.018943489 = product of:
  0.056830466 = sum of:
    0.056830466 = product of:
      0.0852457 = sum of:
        0.043768454 = weight(_text_:retrieval in 2230) [ClassicSimilarity], result of:
          0.043768454 = score(doc=2230,freq=4.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.2835858 = fieldWeight in 2230, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.046875 = fieldNorm(doc=2230)
        0.04147724 = weight(_text_:22 in 2230) [ClassicSimilarity], result of:
          0.04147724 = score(doc=2230,freq=2.0), product of:
            0.17867287 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051022716 = queryNorm
            0.23214069 = fieldWeight in 2230, 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=2230)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Source
    Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (ACM SIGIR '96), Zürich, Switzerland, August 18-22, 1996. Eds.: H.P. Frei et al
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  19. Fieldhouse, M.; Hancock-Beaulieu, M.: ¬The changing face of OKAPI (1994) 0.02 
    0.0188353 = product of:
  0.0565059 = sum of:
    0.0565059 = product of:
      0.08475885 = sum of:
        0.031153653 = weight(_text_:online in 1493) [ClassicSimilarity], result of:
          0.031153653 = score(doc=1493,freq=2.0), product of:
            0.1548489 = queryWeight, product of:
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.051022716 = queryNorm
            0.20118743 = fieldWeight in 1493, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0349014 = idf(docFreq=5778, maxDocs=44218)
              0.046875 = fieldNorm(doc=1493)
        0.05360519 = weight(_text_:retrieval in 1493) [ClassicSimilarity], result of:
          0.05360519 = score(doc=1493,freq=6.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.34732026 = fieldWeight in 1493, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.046875 = fieldNorm(doc=1493)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Abstract
    Describes the OKAPI projects and OKAPI's development as an experimental online catalogue system over 10 years, first at the University of Westminster (formerly the Polytechnique of Central London) and subsequently at City University, London. The 1st OKAPI project in 1984 introduced 'best match' retrieval and focused on the user interface design. The 2nd investigated word stemming, spelling correction and cross reference tables as retrieval aids. A comparative study of 2 library catalogues was undertaken in 1987, while in 1988 query expansion and relevance feedback were introduced and evaluated by laboratory tests. In 1990 live evaluation of automatic query expansion was carried out and in 1993 subject enhancement of bibliographic records was investigated. The latest project has examined the design of a graphical user interface to support interactive query expansion. Discusses the research and evaluation of each project
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  20. Lund, K.; Burgess, C.; Atchley, R.A.: Semantic and associative priming in high-dimensional semantic space (1995) 0.02 
    0.018777166 = product of:
  0.056331497 = sum of:
    0.056331497 = product of:
      0.08449724 = sum of:
        0.03610713 = weight(_text_:retrieval in 2151) [ClassicSimilarity], result of:
          0.03610713 = score(doc=2151,freq=2.0), product of:
            0.15433937 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.051022716 = queryNorm
            0.23394634 = fieldWeight in 2151, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2151)
        0.048390117 = weight(_text_:22 in 2151) [ClassicSimilarity], result of:
          0.048390117 = score(doc=2151,freq=2.0), product of:
            0.17867287 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051022716 = queryNorm
            0.2708308 = fieldWeight in 2151, 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=2151)
      0.6666667 = coord(2/3)
  0.33333334 = coord(1/3)
    Source
    Proceedings of the Seventeenth Annual Conference of the Cognitive Science Society: July 22 - 25, 1995, University of Pittsburgh / ed. by Johanna D. Moore and Jill Fain Lehmann
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval

Authors

Languages

  • e 61
  • d 5
  • chi 1
  • f 1
  • More… Less…

Types

  • a 57
  • r 7
  • el 5
  • m 4
  • p 1
  • More… Less…

Themes

Subjects

Classifications