Search (109 results, page 1 of 6)

  • × theme_ss:"Volltextretrieval"
  1. Silva, E.M. da: Comparing the use of full text search between a conventional IR System and a DBMS (2018) 0.15 
    0.14518976 = product of:
  0.19358635 = sum of:
    0.08687113 = weight(_text_:da in 4719) [ClassicSimilarity], result of:
      0.08687113 = score(doc=4719,freq=2.0), product of:
        0.20483522 = queryWeight, product of:
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.04269026 = queryNorm
        0.42410251 = fieldWeight in 4719, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.0625 = fieldNorm(doc=4719)
    0.10237063 = product of:
      0.20474125 = sum of:
        0.20474125 = weight(_text_:silva in 4719) [ClassicSimilarity], result of:
          0.20474125 = score(doc=4719,freq=2.0), product of:
            0.31446302 = queryWeight, product of:
              7.3661537 = idf(docFreq=75, maxDocs=44218)
              0.04269026 = queryNorm
            0.65108216 = fieldWeight in 4719, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.3661537 = idf(docFreq=75, maxDocs=44218)
              0.0625 = fieldNorm(doc=4719)
      0.5 = coord(1/2)
    0.0043445863 = product of:
      0.008689173 = sum of:
        0.008689173 = weight(_text_:a in 4719) [ClassicSimilarity], result of:
          0.008689173 = score(doc=4719,freq=6.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.17652355 = fieldWeight in 4719, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=4719)
      0.5 = coord(1/2)
  0.75 = coord(3/4)
    Type
    a
  2. Kugler, A.: Automatisierte Volltexterschließung von Retrodigitalisaten am Beispiel historischer Zeitungen (2018) 0.05 
    0.04740063 = product of:
  0.09480126 = sum of:
    0.09214076 = weight(_text_:da in 4595) [ClassicSimilarity], result of:
      0.09214076 = score(doc=4595,freq=4.0), product of:
        0.20483522 = queryWeight, product of:
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.04269026 = queryNorm
        0.44982868 = fieldWeight in 4595, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.046875 = fieldNorm(doc=4595)
    0.0026605048 = product of:
      0.0053210096 = sum of:
        0.0053210096 = weight(_text_:a in 4595) [ClassicSimilarity], result of:
          0.0053210096 = score(doc=4595,freq=4.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.10809815 = fieldWeight in 4595, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046875 = fieldNorm(doc=4595)
      0.5 = coord(1/2)
  0.5 = coord(2/4)
    Abstract
    Seit ein paar Jahren postuliert die DFG in ihren Praxisregeln "Digitalisierung", dass eine ausschließliche Bilddigitalisierung nicht mehr den wissenschaftlichen Ansprüchen Genüge leiste, sondern der digitale Volltext notwendig sei, da dieser die Basis für eine wissenschaftliche Nachnutzung darstellt. Um ein besseres Verständnis davon zu erlangen, was sich hinter dem Begriff "Volltext" verbirgt, wird im Folgenden ein kleiner Einblick in die technischen Verfahren zur automatisierten Volltexterschließung von Retrodigitalisaten geboten. Fortschritte und auch Grenzen der aktuellen Methoden werden vorgestellt und wie Qualität in diesem Zusammenhang überhaupt bemessen werden kann. Die automatisierten Verfahren zur Volltexterschließung werden am Beispiel historischer Zeitungen erläutert, da deren Zugänglichmachung gerade in den Geisteswissenschaften ein großes Desiderat ist und diese Quellengattung zugleich aufgrund der Spaltenstruktur besondere technische Herausforderungen mit sich bringt. 2016 wurde das DFG-Projekt zur Erstellung eines "Masterplan Zeitungsdigitalisierung" fertiggestellt, dessen Ergebnisse hier einfließen.
    Type
    a
  3. Baguhn, J.: Volltextretrieval : stürmische Entwicklungen (1995) 0.05 
    0.045209236 = product of:
  0.09041847 = sum of:
    0.08687113 = weight(_text_:da in 2329) [ClassicSimilarity], result of:
      0.08687113 = score(doc=2329,freq=2.0), product of:
        0.20483522 = queryWeight, product of:
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.04269026 = queryNorm
        0.42410251 = fieldWeight in 2329, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.0625 = fieldNorm(doc=2329)
    0.00354734 = product of:
      0.00709468 = sum of:
        0.00709468 = weight(_text_:a in 2329) [ClassicSimilarity], result of:
          0.00709468 = score(doc=2329,freq=4.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.14413087 = fieldWeight in 2329, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2329)
      0.5 = coord(1/2)
  0.5 = coord(2/4)
    Abstract
    10 Jahre cogito lassen auch uns auf diesen in der Branche langen Zeitraum zurückblicken. Der Informationsmarkt 1985 war noch gut überschaubar und von der PSI noch gar nicht als attraktiv erkannt. Doch schon zu diesem Zeitpunkt machten wir uns Gedanken über die Verarbeitung von unstrukturierten Informationen, da mehrere Nachrichtenverteilsysteme für größere Behörden relalisiert wurden. Die Wünsche der Benutzer waren mit herkömmlichen Datenbanken nur schwer zu realisieren oder die Zugriffszeiten zu lang
    Language
    a
    Type
    a
  4. Rosemann, L.: ¬Die Volltextabfrage und das Alleinstellungsmerkmal des physischen Buches (2006) 0.02 
    0.023505505 = product of:
  0.04701101 = sum of:
    0.04607038 = weight(_text_:da in 5142) [ClassicSimilarity], result of:
      0.04607038 = score(doc=5142,freq=4.0), product of:
        0.20483522 = queryWeight, product of:
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.04269026 = queryNorm
        0.22491434 = fieldWeight in 5142, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.7981725 = idf(docFreq=990, maxDocs=44218)
          0.0234375 = fieldNorm(doc=5142)
    9.4063056E-4 = product of:
      0.0018812611 = sum of:
        0.0018812611 = weight(_text_:a in 5142) [ClassicSimilarity], result of:
          0.0018812611 = score(doc=5142,freq=2.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.03821847 = fieldWeight in 5142, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0234375 = fieldNorm(doc=5142)
      0.5 = coord(1/2)
  0.5 = coord(2/4)
    Content
    . . . Ich plädiere hier aus den oben genannten wissenstheoretischen Gründen nicht nur für die Aufrechterhaltung eines Mindestmaßes an Registern und Indexen im Anhang von physischen Büchern, sondern sogar für deren Ausbau, deren standardmäßige Zugabe bei Sach- und wissenschaftlichen Büchern gerade angesichts der Volltextnutzung durch Online-Abfragen. Warum? Hierzu sechs Argumente: 1. Wie oben bereits angerissen, lehrt die Erfahrung bei CD-ROM-Zugaben zu opulenten Werken, dass Parallelmedien mit Parallelinhalten von den Nutzern nicht wirklich angenommen werden; es ist umständlich, zur Auffindung bestimmter Textstellen den Computer befragen zu müssen und die Fundstellen dann zwischen zwei Buchdeckeln nachzuschlagen. 2. Über frei wählbare Suchbegriffe seitens des Nutzers ist noch keine Qualität der Suchergebnisse garantiert. Erst das Einrechnen entsprechender Verweisungsbegriffe und Synonyme in die Suchabfrage führt zu Qualität des Ergebnisses. Die scheinbar eingesparten Kosten einer einmaligen bzw. abonnementartigen Investition in eine Online-Verfügbarkeit der Buchinhalte vonseiten der Verlage werden dann über die Hintertür doch wieder fällig, wenn sich nämlich herausstellt, dass Nutzer bei der von ihnen gesuchten Information nicht fündig werden, weil sie unter dem "falschen", d.h. entweder ihnen nicht bekannten oder einem ihnen gerade nicht präsenten Schlagwort gesucht haben. Die Online-Suchabfrage, die auf den ersten Blick höchst nutzerfreundlich erscheint, da eine ungeheure Menge an Titeln die Abfrage umfasst, erweist sich womöglich als wenig brauchbar, wenn sich die Trefferqualität aus den genannten Gründen als beschränkt herausstellt. 3. Nur bei entsprechenden Restriktionen des Zugangs bzw. der präsentierten Textausschnitte werden die Verlage es gewährleistet sehen, dass die Nutzerin, der Nutzer nicht vom Kauf des physischen Buches Abstand nehmen. Nur wenn die Nutzer wissen, dass ihnen gerade jene Informationen am Bildschirm vorenthalten werden, die sie im zu erwerbenden Buch mit Gewissheit finden werden, werden sie das Buch noch erwerben wollen. Wer auf die Schnelle nur ein Kochrezept aus einem teuer bebilderten Kochbuch der Oberklasse abrufen kann, wird das teure Kochbuch eben nicht mehr kaufen. Analog stellt sich die Frage, ob nicht aus diesem Grunde auch Bibliotheken erwägen werden, angesichts der elektronischen Präsenz teuerer physischer Bücher auf den Erwerb der Letzteren zu verzichten, wohl wissend, dass den Wissenschaftlern im Zweifel einige Mausklicks genügen, um die gewünschte Begriffsrecherche erschöpfend beantwortet zu finden.
    4. Vermutlich wird sich aufgrund der genannten Gründe der Buchservice Volltextsuche als heterogen darstellen: Einige Verlage werden gar nicht mitspielen, andere werden ein Buch im Vollzugriff, ein anderes nur zum Teil, ein drittes nur als Metainformation usw. indizieren lassen. Dies wird letztlich ebenfalls die Trefferqualität schmälern, da der Nutzer dann wiederum wissen muss, genau welche Informationen und Texte ihm bei seiner Suche vorenthalten werden. Das gedruckte Sachbuch wird gegen seinen eigenen digitalen Klon ein Alleinstellungsmerkmal brauchen, um weiterhin attraktiv zu sein. 5. Ein solches Alleinstellungsmerkmal würde m.E. maßgeblich durch die Erstellung von gedruckten Registern bereits in der Druckausgabe erreicht werden. Damit würde die Druckausgabe tatsächlich an Wert gewinnen und der Buchkäufer erhielte einen echten Mehrwert. Zum einen spiegelt sich bereits in der Erstellung konventioneller gedruckter Register die zweite digitale Revolution wider: Moderne Registererstellung basiert heutzutage ebenfalls auf der digitalen Verwertung des Volltextes. Zum anderen erfordert das "Registermachen" zugleich die Erbringung jener o.g. sachdienlichen Mehrinformationen wie Verweisungsbegriffe, vernünftige Klassifizierungen, nicht-redundante Begriffsauswahl etc., die nur begrenzt automatisierbar sind und Fachwissen erfordern. Erst diese beiden Komponenten lassen die Indexierung schlussendlich zu einer hochwertigen Aufbereitung sequentieller Information werden. 6. Genau diese Mehr- und Metainformationen, die die vorausgegangene Erstellung eines Print-Vollregisters geliefert hat, lassen sich dann in den Suchalgorithmus der Online-Suche zur Qualitätssteigerung der Treffer einrechnen."
    Type
    a
  5. Laegreid, J.A.: SIFT: a Norwegian information retrieval system (1993) 0.01 
    0.014076229 = product of:
  0.056304917 = sum of:
    0.056304917 = sum of:
      0.010033391 = weight(_text_:a in 7701) [ClassicSimilarity], result of:
        0.010033391 = score(doc=7701,freq=8.0), product of:
          0.049223874 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.04269026 = queryNorm
          0.20383182 = fieldWeight in 7701, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=7701)
      0.046271525 = weight(_text_:22 in 7701) [ClassicSimilarity], result of:
        0.046271525 = score(doc=7701,freq=2.0), product of:
          0.149494 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.04269026 = queryNorm
          0.30952093 = fieldWeight in 7701, 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=7701)
  0.25 = coord(1/4)
    Abstract
    Describes SIFT (Search in Free Text) an information retrieval system originally developed for administering governmental documents in Norway but which is now being applied alsewhere. SIFT handles structured information well. A library system, SIFT-BIBL, is now available. SIFT's retrieval engine and search facilities are powerful. Its user interface is limited but being imporved. An application programmer interface has been released which will allow programmers to develop their own interface. A Windows-based- client-server version is now being beta tested
    Date
    23. 1.1999 19:22:09
    Type
    a
  6. Reinisch, F.: Wer suchet - der findet? : oder Die Überwindung der sprachlichen Grenzen bei der Suche in Volltextdatenbanken (2000) 0.01 
    0.012822055 = product of:
  0.05128822 = sum of:
    0.05128822 = sum of:
      0.0050166957 = weight(_text_:a in 4919) [ClassicSimilarity], result of:
        0.0050166957 = score(doc=4919,freq=2.0), product of:
          0.049223874 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.04269026 = queryNorm
          0.10191591 = fieldWeight in 4919, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=4919)
      0.046271525 = weight(_text_:22 in 4919) [ClassicSimilarity], result of:
        0.046271525 = score(doc=4919,freq=2.0), product of:
          0.149494 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.04269026 = queryNorm
          0.30952093 = fieldWeight in 4919, 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=4919)
  0.25 = coord(1/4)
    Date
    22. 7.2000 17:48:06
    Type
    a
  7. Zillmann, H.: OSIRIS und eLib : Information Retrieval und Search Engines in Full-text Databases (2001) 0.01 
    0.012822055 = product of:
  0.05128822 = sum of:
    0.05128822 = sum of:
      0.0050166957 = weight(_text_:a in 5937) [ClassicSimilarity], result of:
        0.0050166957 = score(doc=5937,freq=2.0), product of:
          0.049223874 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.04269026 = queryNorm
          0.10191591 = fieldWeight in 5937, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=5937)
      0.046271525 = weight(_text_:22 in 5937) [ClassicSimilarity], result of:
        0.046271525 = score(doc=5937,freq=2.0), product of:
          0.149494 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.04269026 = queryNorm
          0.30952093 = fieldWeight in 5937, 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=5937)
  0.25 = coord(1/4)
    Date
    14. 6.2001 12:22:31
    Type
    a
  8. Dambeck, H.; Engler, T.: Gesucht und gefunden : Neun Volltext-Suchprogramme für den Desktop (2002) 0.01 
    0.012822055 = product of:
  0.05128822 = sum of:
    0.05128822 = sum of:
      0.0050166957 = weight(_text_:a in 1169) [ClassicSimilarity], result of:
        0.0050166957 = score(doc=1169,freq=2.0), product of:
          0.049223874 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.04269026 = queryNorm
          0.10191591 = fieldWeight in 1169, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=1169)
      0.046271525 = weight(_text_:22 in 1169) [ClassicSimilarity], result of:
        0.046271525 = score(doc=1169,freq=2.0), product of:
          0.149494 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.04269026 = queryNorm
          0.30952093 = fieldWeight in 1169, 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=1169)
  0.25 = coord(1/4)
    Source
    c't. 2002, H.22, S.190-197
    Type
    a
  9. Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989) 0.01 
    0.010006163 = product of:
  0.040024653 = sum of:
    0.040024653 = sum of:
      0.0053210096 = weight(_text_:a in 3564) [ClassicSimilarity], result of:
        0.0053210096 = score(doc=3564,freq=4.0), product of:
          0.049223874 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.04269026 = queryNorm
          0.10809815 = fieldWeight in 3564, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=3564)
      0.034703642 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
        0.034703642 = score(doc=3564,freq=2.0), product of:
          0.149494 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.04269026 = queryNorm
          0.23214069 = fieldWeight in 3564, 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=3564)
  0.25 = coord(1/4)
    Abstract
    Searches conducted as part of the MEDLINE/Full-Text Research Project revealed that the full-text data bases of clinical medical journal articles (CCML (Comprehensive Core Medical Library) from BRS Information Technologies, and MEDIS from Mead Data Central) did not retrieve all the relevant citations. An analysis of the data indicated that 204 relevant citations were retrieved only by MEDLINE. A comparison of the strategies used on the full-text data bases with the text of the articles of these 204 citations revealed that 2 reasons contributed to these failure. The searcher often constructed a restrictive strategy which resulted in the loss of relevant documents; and as in other kinds of retrieval, the problems of natural language caused the loss of relevant documents.
    Date
    9. 1.1996 10:22:31
  10. Kristensen, J.; Järvelin, K.: ¬The effectiveness of a searching thesaurus in free-text searching in a full-text database (1990) 0.00 
    0.0021722931 = product of:
  0.008689173 = sum of:
    0.008689173 = product of:
      0.017378345 = sum of:
        0.017378345 = weight(_text_:a in 2043) [ClassicSimilarity], result of:
          0.017378345 = score(doc=2043,freq=6.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.3530471 = fieldWeight in 2043, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.125 = fieldNorm(doc=2043)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  11. Bernstein, L.M.; Williamson, R.E.: Testing of a natural language retrieval system for a full text knowledge base (1984) 0.00 
    0.0019007566 = product of:
  0.0076030265 = sum of:
    0.0076030265 = product of:
      0.015206053 = sum of:
        0.015206053 = weight(_text_:a in 1803) [ClassicSimilarity], result of:
          0.015206053 = score(doc=1803,freq=6.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.3089162 = fieldWeight in 1803, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=1803)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  12. Marcus, J.: Everyone's a futurist : full text year in review - 1994 (1994) 0.00 
    0.00177367 = product of:
  0.00709468 = sum of:
    0.00709468 = product of:
      0.01418936 = sum of:
        0.01418936 = weight(_text_:a in 2126) [ClassicSimilarity], result of:
          0.01418936 = score(doc=2126,freq=4.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.28826174 = fieldWeight in 2126, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.125 = fieldNorm(doc=2126)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  13. Kristensen, J.: Expanding end-users' query statements for free text searching with a search-aid thesaurus (1993) 0.00 
    0.0016591164 = product of:
  0.0066364654 = sum of:
    0.0066364654 = product of:
      0.013272931 = sum of:
        0.013272931 = weight(_text_:a in 6621) [ClassicSimilarity], result of:
          0.013272931 = score(doc=6621,freq=14.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.26964417 = fieldWeight in 6621, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=6621)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Abstract
    Tests the effectiveness of a thesaurus as a search-aid in free text searching of a full text database. A set of queries was searched against a large full text database of newspaper articles. The thesaurus contained equivalence, hierarchical and associative relationships. Each query was searched in five modes: basic search, synonym search, narrower term search, related term search, and union of all previous searches. The searches were analyzed in terms of relative recall and precision
    Type
    a
  14. White, F.: ISYS 3.01 : a review (1993) 0.00 
    0.0016591164 = product of:
  0.0066364654 = sum of:
    0.0066364654 = product of:
      0.013272931 = sum of:
        0.013272931 = weight(_text_:a in 2052) [ClassicSimilarity], result of:
          0.013272931 = score(doc=2052,freq=14.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.26964417 = fieldWeight in 2052, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2052)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Abstract
    Reviews ISYS, a full text retrieval system from Odyssey developments. ISYS supports a wide variety of wordprocessor, text and spreadsheet formats. A programming interface is included for developers to integrate ISYS into their own applications. Describes how to use ISYS to create a database index for a set of documents and then query that index to locate, retrieve and display information from the indexed documents. Discusses configuration options, precedence of operators, displaying and manipulating search results, the advanced menu, ease of learning and use, documentation and library applications
    Type
    a
  15. Tenopir, C.: Full text database retrieval performance (1985) 0.00 
    0.0015677174 = product of:
  0.0062708696 = sum of:
    0.0062708696 = product of:
      0.012541739 = sum of:
        0.012541739 = weight(_text_:a in 406) [ClassicSimilarity], result of:
          0.012541739 = score(doc=406,freq=2.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.25478977 = fieldWeight in 406, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.15625 = fieldNorm(doc=406)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  16. Ojala, M.: Research into full-text retrieval (1990) 0.00 
    0.0015677174 = product of:
  0.0062708696 = sum of:
    0.0062708696 = product of:
      0.012541739 = sum of:
        0.012541739 = weight(_text_:a in 576) [ClassicSimilarity], result of:
          0.012541739 = score(doc=576,freq=2.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.25478977 = fieldWeight in 576, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.15625 = fieldNorm(doc=576)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  17. Sievert, M.C.: Full-text information retrieval : introduction (1996) 0.00 
    0.0015677174 = product of:
  0.0062708696 = sum of:
    0.0062708696 = product of:
      0.012541739 = sum of:
        0.012541739 = weight(_text_:a in 4719) [ClassicSimilarity], result of:
          0.012541739 = score(doc=4719,freq=8.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.25478977 = fieldWeight in 4719, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.078125 = fieldNorm(doc=4719)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Abstract
    Introduces a special section devoted to full text information retrieval. Gives an overview of full text databases and research into them. There is a lack of a single definition of full text. Articles in the library related literature about full text have appeared with increasing frequnecy
    Type
    a
  18. Hildreth, C.R.: ¬The use and understanding of keyword searching in a university online catalog (1997) 0.00 
    0.0015519613 = product of:
  0.006207845 = sum of:
    0.006207845 = product of:
      0.01241569 = sum of:
        0.01241569 = weight(_text_:a in 7377) [ClassicSimilarity], result of:
          0.01241569 = score(doc=7377,freq=4.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.25222903 = fieldWeight in 7377, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=7377)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Type
    a
  19. Dubois, C.P.R.: Free text vs. controlled vocabulary; a reassessment (1987) 0.00 
    0.0015360432 = product of:
  0.006144173 = sum of:
    0.006144173 = product of:
      0.012288346 = sum of:
        0.012288346 = weight(_text_:a in 2048) [ClassicSimilarity], result of:
          0.012288346 = score(doc=2048,freq=12.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.24964198 = fieldWeight in 2048, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2048)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    Abstract
    Free text and controlled vocabulary searching can no longer be viewed as antagonistic techniques in information retrieval since they both display advantages and weaknesses dependent on a fairly wide range of context, with the option to use both increasingly favoured. An attempt is made to present a list of features associated with the two techniques and to suggest a methodology to assist in deciding on the optimal retrieval technique for a particular purpose. The relevance of the techniques in expert systems and full text contexts is also discussed. Finally, recommendations for further research are suggested, concentrating on survey techniques in real-life retrieval situations
    Type
    a
  20. Gross, T.; Taylor, A.G.; Joudrey, D.N.: Still a lot to lose : the role of controlled vocabulary in keyword searching (2015) 0.00 
    0.0014517268 = product of:
  0.005806907 = sum of:
    0.005806907 = product of:
      0.011613814 = sum of:
        0.011613814 = weight(_text_:a in 2007) [ClassicSimilarity], result of:
          0.011613814 = score(doc=2007,freq=14.0), product of:
            0.049223874 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.04269026 = queryNorm
            0.23593865 = fieldWeight in 2007, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2007)
      0.5 = coord(1/2)
  0.25 = coord(1/4)
    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

Authors

Years

Languages

Types

  • a 106
  • s 2
  • el 1
  • m 1
  • x 1
  • More… Less…

Themes

Subjects