Search (40 results, page 1 of 2)

  • × theme_ss:"Retrievalstudien"
  1. Biebricher, P.; Fuhr, N.; Niewelt, B.: ¬Der AIR-Retrievaltest (1986) 0.02 
    0.015045119 = product of:
  0.120360956 = sum of:
    0.120360956 = weight(_text_:darstellung in 4040) [ClassicSimilarity], result of:
      0.120360956 = score(doc=4040,freq=2.0), product of:
        0.19656755 = queryWeight, product of:
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.03546852 = queryNorm
        0.61231345 = fieldWeight in 4040, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.078125 = fieldNorm(doc=4040)
  0.125 = coord(1/8)
    Abstract
    Der Beitrag enthält eine Darstellung zur Durchführung und zu den Ergebnissen des Retrievaltests zum AIR/PHYS-Projekt. Er zählt mit seinen 309 Fragen und 15.000 Dokumenten zu den größten Retrievaltests, die bisher zur Evaluierung automatisierter Indexierungs- oder Retrievalverfahren vorgenommen wurden.
  2. Krause, J.; Womser-Hacker, C.: PADOK-II : Retrievaltests zur Bewertung von Volltextindexierungsvarianten für das deutsche Patentinformationssystem (1990) 0.01 
    0.012036095 = product of:
  0.09628876 = sum of:
    0.09628876 = weight(_text_:darstellung in 2653) [ClassicSimilarity], result of:
      0.09628876 = score(doc=2653,freq=2.0), product of:
        0.19656755 = queryWeight, product of:
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.03546852 = queryNorm
        0.48985076 = fieldWeight in 2653, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.0625 = fieldNorm(doc=2653)
  0.125 = coord(1/8)
    Abstract
    Vorgestellt werden die Ergebnisse extensiver Retrievaltests von zwei Varianten von Inhalteserschließungen (Freitext und PASSAT) für das deutsche Patentinformationssystem auf der Basis von Volltexten. Die Tests führte die Fachgruppe Linguistische Informationswissenschaft der Universität Regensburg von 1986-1989 in Zusammenarbeit mit dem Deutschen Patentamt, dem Fachinformationszentrum Karlsruhe und meheren industrieellen Partnern durch. Der Schwerpunkt des Berichts liegt auf dem allgemeinen Ansatz der Bewertung der Ziele des Projekts und auf der Darstellung der statistischen Evaluierungsergebnisse.
  3. Meyer, O.C.: Retrievalexperimente mit bibliothekarischen Daten : Historischer Überblick und aktueller Forschungsstand (2022) 0.01 
    0.009027071 = product of:
  0.07221657 = sum of:
    0.07221657 = weight(_text_:darstellung in 655) [ClassicSimilarity], result of:
      0.07221657 = score(doc=655,freq=2.0), product of:
        0.19656755 = queryWeight, product of:
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.03546852 = queryNorm
        0.36738807 = fieldWeight in 655, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.046875 = fieldNorm(doc=655)
  0.125 = coord(1/8)
    Abstract
    Die Retrievalforschung in der Bibliothekswissenschaft hat in den letzten Jahrzehnten beachtliche Fortschritte gemacht. Automatische Indexierungsmethoden werden immer häufiger angewendet, obwohl dieses Thema in der Bibliothekswelt kontrovers diskutiert wird. Die Ergebnisse maschineller Erschließungsarbeit werden anhand von Retrievaltests festgehalten. Der Gegenstand dieser Arbeit ist die Darstellung von Retrievalexperimenten mit bibliothekarischen Daten. Zu Beginn werden die Grundlagen solcher Retrievaltests sowie das Cranfield-Paradigma erläutert. Es folgt eine Vorstellung verschiedener wissen schaftlicher Projekte aus diesem Forschungsfeld in chronologischer Reihenfolge. Wenn Verbindungen oder Einflussnahmen zwischen den einzelnen Projekten bestehen, werden diese herausgestellt. Im besonderen Umfang wird das Retrievalprojekt GELIC der TH Köln beschrieben, an dem der Autor dieser Arbeit beteiligt war. Obwohl es isolierte Retrievalprojekte gibt, lässt sich aus methodischer Sicht eine Verbindung von den frühesten Experimenten zu den heutigen Retrievalexperimenten herstellen. Diese Entwicklung ist noch nicht abgeschlossen.
  4. Scherer, B.: Automatische Indexierung und ihre Anwendung im DFG-Projekt "Gemeinsames Portal für Bibliotheken, Archive und Museen (BAM)" (2003) 0.01 
    0.0075225597 = product of:
  0.060180478 = sum of:
    0.060180478 = weight(_text_:darstellung in 4283) [ClassicSimilarity], result of:
      0.060180478 = score(doc=4283,freq=2.0), product of:
        0.19656755 = queryWeight, product of:
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.03546852 = queryNorm
        0.30615672 = fieldWeight in 4283, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          5.542029 = idf(docFreq=470, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4283)
  0.125 = coord(1/8)
    Abstract
    Automatische Indexierung verzeichnet schon seit einigen Jahren aufgrund steigender Informationsflut ein wachsendes Interesse. Allerdings gibt es immer noch Vorbehalte gegenüber der intellektuellen Indexierung in Bezug auf Qualität und größerem Aufwand der Systemimplementierung bzw. -pflege. Neuere Entwicklungen aus dem Bereich des Wissensmanagements, wie beispielsweise Verfahren aus der Künstlichen Intelligenz, der Informationsextraktion, dem Text Mining bzw. der automatischen Klassifikation sollen die automatische Indexierung aufwerten und verbessern. Damit soll eine intelligentere und mehr inhaltsbasierte Erschließung geleistet werden. In dieser Masterarbeit wird außerhalb der Darstellung von Grundlagen und Verfahren der automatischen Indexierung sowie neueren Entwicklungen auch Möglichkeiten der Evaluation dargestellt. Die mögliche Anwendung der automatischen Indexierung im DFG-ProjektGemeinsames Portal für Bibliotheken, Archive und Museen (BAM)" bilden den Schwerpunkt der Arbeit. Im Portal steht die bibliothekarische Erschließung von Texten im Vordergrund. In einem umfangreichen Test werden drei deutsche, linguistische Systeme mit statistischen Verfahren kombiniert (die aber teilweise im System bereits integriert ist) und evaluiert, allerdings nur auf der Basis der ausgegebenen Indexate. Abschließend kann festgestellt werden, dass die Ergebnisse und damit die Qualität (bezogen auf die Indexate) von intellektueller und automatischer Indexierung noch signifikant unterschiedlich sind. Die Gründe liegen in noch zu lösenden semantischen Problemen bzw, in der Obereinstimmung mit Worten aus einem Thesaurus, die von einem automatischen Indexierungssystem nicht immer nachvollzogen werden kann. Eine Inhaltsanreicherung mit den Indexaten zum Vorteil beim Retrieval kann, je nach System oder auch über die Einbindung durch einen Thesaurus, erreicht werden.
  5. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.00 
    0.004204808 = product of:
  0.033638462 = sum of:
    0.033638462 = product of:
      0.067276925 = sum of:
        0.067276925 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
          0.067276925 = score(doc=262,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.5416616 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=262)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    20.10.2000 12:22:23
  6. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.00 
    0.004204808 = product of:
  0.033638462 = sum of:
    0.033638462 = product of:
      0.067276925 = sum of:
        0.067276925 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
          0.067276925 = score(doc=6418,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.5416616 = fieldWeight in 6418, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=6418)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Source
    Online. 22(1998) no.6, S.57-58
  7. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.00 
    0.004204808 = product of:
  0.033638462 = sum of:
    0.033638462 = product of:
      0.067276925 = sum of:
        0.067276925 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
          0.067276925 = score(doc=6438,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.5416616 = fieldWeight in 6438, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=6438)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    11. 8.2001 16:22:19
  8. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.00 
    0.004204808 = product of:
  0.033638462 = sum of:
    0.033638462 = product of:
      0.067276925 = sum of:
        0.067276925 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
          0.067276925 = score(doc=5089,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.5416616 = fieldWeight in 5089, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=5089)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    22. 7.2006 18:43:54
  9. Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997) 0.00 
    0.0030034343 = product of:
  0.024027474 = sum of:
    0.024027474 = product of:
      0.04805495 = sum of:
        0.04805495 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
          0.04805495 = score(doc=3103,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.38690117 = fieldWeight in 3103, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=3103)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    27. 2.1999 20:55:22
  10. Ng, K.B.; Loewenstern, D.; Basu, C.; Hirsh, H.; Kantor, P.B.: Data fusion of machine-learning methods for the TREC5 routing tak (and other work) (1997) 0.00 
    0.0030034343 = product of:
  0.024027474 = sum of:
    0.024027474 = product of:
      0.04805495 = sum of:
        0.04805495 = weight(_text_:22 in 3107) [ClassicSimilarity], result of:
          0.04805495 = score(doc=3107,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.38690117 = fieldWeight in 3107, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=3107)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    27. 2.1999 20:59:22
  11. Saracevic, T.: On a method for studying the structure and nature of requests in information retrieval (1983) 0.00 
    0.0030034343 = product of:
  0.024027474 = sum of:
    0.024027474 = product of:
      0.04805495 = sum of:
        0.04805495 = weight(_text_:22 in 2417) [ClassicSimilarity], result of:
          0.04805495 = score(doc=2417,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.38690117 = fieldWeight in 2417, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=2417)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Pages
    S.22-25
  12. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
          0.038443957 = score(doc=5002,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 5002, 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=5002)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    19. 3.1996 11:22:12
  13. Sanderson, M.: ¬The Reuters test collection (1996) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
          0.038443957 = score(doc=6971,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 6971, 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=6971)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    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
  14. Lespinasse, K.: TREC: une conference pour l'evaluation des systemes de recherche d'information (1997) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 744) [ClassicSimilarity], result of:
          0.038443957 = score(doc=744,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 744, 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=744)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    1. 8.1996 22:01:00
  15. ¬The Fifth Text Retrieval Conference (TREC-5) (1997) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 3087) [ClassicSimilarity], result of:
          0.038443957 = score(doc=3087,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 3087, 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=3087)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Abstract
    Proceedings of the 5th TREC-confrerence held in Gaithersburgh, Maryland, Nov 20-22, 1996. Aim of the conference was discussion on retrieval techniques for large test collections. Different research groups used different techniques, such as automated thesauri, term weighting, natural language techniques, relevance feedback and advanced pattern matching, for information retrieval from the same large database. This procedure makes it possible to compare the results. The proceedings include papers, tables of the system results, and brief system descriptions including timing and storage information
  16. Pemberton, J.K.; Ojala, M.; Garman, N.: Head to head : searching the Web versus traditional services (1998) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 3572) [ClassicSimilarity], result of:
          0.038443957 = score(doc=3572,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 3572, 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=3572)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Source
    Online. 22(1998) no.3, S.24-26,28
  17. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
          0.038443957 = score(doc=261,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 261, 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=261)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Abstract
    Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
  18. Ellis, D.: Progress and problems in information retrieval (1996) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 789) [ClassicSimilarity], result of:
          0.038443957 = score(doc=789,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 789, 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=789)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Date
    26. 7.2002 20:22:46
  19. ¬The Eleventh Text Retrieval Conference, TREC 2002 (2003) 0.00 
    0.0024027473 = product of:
  0.019221978 = sum of:
    0.019221978 = product of:
      0.038443957 = sum of:
        0.038443957 = weight(_text_:22 in 4049) [ClassicSimilarity], result of:
          0.038443957 = score(doc=4049,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.30952093 = fieldWeight in 4049, 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=4049)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Abstract
    Proceedings of the llth TREC-conference held in Gaithersburg, Maryland (USA), November 19-22, 2002. Aim of the conference was discussion an retrieval and related information-seeking tasks for large test collection. 93 research groups used different techniques, for information retrieval from the same large database. This procedure makes it possible to compare the results. The tasks are: Cross-language searching, filtering, interactive searching, searching for novelty, question answering, searching for video shots, and Web searching.
  20. Blagden, J.F.: How much noise in a role-free and link-free co-ordinate indexing system? (1966) 0.00 
    0.002102404 = product of:
  0.016819231 = sum of:
    0.016819231 = product of:
      0.033638462 = sum of:
        0.033638462 = weight(_text_:22 in 2718) [ClassicSimilarity], result of:
          0.033638462 = score(doc=2718,freq=2.0), product of:
            0.12420471 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03546852 = queryNorm
            0.2708308 = fieldWeight in 2718, 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=2718)
      0.5 = coord(1/2)
  0.125 = coord(1/8)
    Source
    Journal of documentation. 22(1966), S.203-209

Authors

Years

Languages

  • e 31
  • d 7
  • f 1
  • More… Less…

Types

  • a 34
  • s 3
  • m 2
  • x 2
  • More… Less…

Themes