Search (28 results, page 1 of 2)

  • × year_i:[2000 TO 2010}
  • × theme_ss:"Retrievalstudien"
  1. Buckley, C.; Voorhees, E.M.: Retrieval system evaluation (2005) 0.02 
    0.02008057 = product of:
  0.08032228 = sum of:
    0.08032228 = weight(_text_:c in 648) [ClassicSimilarity], result of:
      0.08032228 = score(doc=648,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.5335526 = fieldWeight in 648, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.109375 = fieldNorm(doc=648)
  0.25 = coord(1/4)
  2. Pedersen, J.O.; Silverstein, C.; Vogt, C.C.: Verity at TREC-6 : out-of-the-box and beyond (2000) 0.02 
    0.01721192 = product of:
  0.06884768 = sum of:
    0.06884768 = weight(_text_:c in 6427) [ClassicSimilarity], result of:
      0.06884768 = score(doc=6427,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.45733082 = fieldWeight in 6427, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.09375 = fieldNorm(doc=6427)
  0.25 = coord(1/4)
  3. Cole, C.: Intelligent information retrieval : Part IV: Testing the timing of two information retrieval devices in a naturalistic setting (2001) 0.02 
    0.01721192 = product of:
  0.06884768 = sum of:
    0.06884768 = weight(_text_:c in 365) [ClassicSimilarity], result of:
      0.06884768 = score(doc=365,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.45733082 = fieldWeight in 365, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.09375 = fieldNorm(doc=365)
  0.25 = coord(1/4)
  4. Buckley, C.; Voorhees, E.M.: Retrieval evaluation with incomplete information (2004) 0.02 
    0.01721192 = product of:
  0.06884768 = sum of:
    0.06884768 = weight(_text_:c in 4127) [ClassicSimilarity], result of:
      0.06884768 = score(doc=4127,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.45733082 = fieldWeight in 4127, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.09375 = fieldNorm(doc=4127)
  0.25 = coord(1/4)
  5. Buckley, C.: ¬The SMART Project at TREC (2005) 0.02 
    0.01721192 = product of:
  0.06884768 = sum of:
    0.06884768 = weight(_text_:c in 5088) [ClassicSimilarity], result of:
      0.06884768 = score(doc=5088,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.45733082 = fieldWeight in 5088, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.09375 = fieldNorm(doc=5088)
  0.25 = coord(1/4)
  6. Greisdorf, H.; O'Connor, B.: Nodes of topicality modeling user notions of on topic documents (2003) 0.01 
    0.013269257 = product of:
  0.053077027 = sum of:
    0.053077027 = weight(_text_:et in 5175) [ClassicSimilarity], result of:
      0.053077027 = score(doc=5175,freq=2.0), product of:
        0.20477319 = queryWeight, product of:
          4.692005 = idf(docFreq=1101, maxDocs=44218)
          0.043643 = queryNorm
        0.2591991 = fieldWeight in 5175, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.692005 = idf(docFreq=1101, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5175)
  0.25 = coord(1/4)
    Abstract
    Griesdorf and O'Connor attempt to determine the aspects of a retrieved item that provide a questioner with evidence that the item is in fact on the topic searched independent of its relevance. To this end they collect data from 32 participants, 11 from the business community as well as 21 doctoral students at the University of North Texas each of whom were asked to state if they considered material that approaches a topic in each of 14 specific manners as " on topic" or "off topic." Chi-square indicates that the observed values are significantly different from expected values and the chi-square residuals for on topic judgements exceed plus or minus two in eight cases and plus two in five cases. The positive values which indicate a percentage of response greater than that from chance suggest that documents considered topical are only related to the problem at hand, contain terms that were in the query, and describe, explain or expand the topic of the query. The chi-square residuals for off topic judgements exceed plus or minus two in ten cases and plus two in four cases. The positive values suggest that documents considered not topical exhibit a contrasting, contrary, or confounding point of view, or merely spark curiosity. Such material might well be relevant, but is not judged topical. This suggests that topical appropriateness may best be achieved using the Bruza, et alia, left compositional monotonicity approach.
  7. Radev, D.R.; Libner, K.; Fan, W.: Getting answers to natural language questions on the Web (2002) 0.01 
    0.013269257 = product of:
  0.053077027 = sum of:
    0.053077027 = weight(_text_:et in 5204) [ClassicSimilarity], result of:
      0.053077027 = score(doc=5204,freq=2.0), product of:
        0.20477319 = queryWeight, product of:
          4.692005 = idf(docFreq=1101, maxDocs=44218)
          0.043643 = queryNorm
        0.2591991 = fieldWeight in 5204, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.692005 = idf(docFreq=1101, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5204)
  0.25 = coord(1/4)
    Abstract
    Seven hundred natural language questions from TREC-8 and TREC-9 were sent by Radev, Libner, and Fan to each of nine web search engines. The top 40 sites returned by each system were stored for evaluation of their productivity of correct answers. Each question per engine was scored as the sum of the reciprocal ranks of identified correct answers. The large number of zero scores gave a positive skew violating the normality assumption for ANOVA, so values were transformed to zero for no hit and one for one or more hits. The non-zero values were then square-root transformed to remove the remaining positive skew. Interactions were observed between search engine and answer type (name, place, date, et cetera), search engine and number of proper nouns in the query, search engine and the need for time limitation, and search engine and total query words. All effects were significant. Shortest queries had the highest mean scores. One or more proper nouns present provides a significant advantage. Non-time dependent queries have an advantage. Place, name, person, and text description had mean scores between .85 and .9 with date at .81 and number at .59. There were significant differences in score by search engine. Search engines found at least one correct answer in between 87.7 and 75.45 of the cases. Google and Northern Light were just short of a 90% hit rate. No evidence indicated that a particular engine was better at answering any particular sort of question.
  8. Oppenheim, C.; Morris, A.; McKnight, C.: ¬The evaluation of WWW search engines (2000) 0.01 
    0.012170665 = product of:
  0.04868266 = sum of:
    0.04868266 = weight(_text_:c in 4546) [ClassicSimilarity], result of:
      0.04868266 = score(doc=4546,freq=4.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.32338172 = fieldWeight in 4546, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.046875 = fieldNorm(doc=4546)
  0.25 = coord(1/4)
  9. Kluck, M.; Winter, M.: Topic-Entwicklung und Relevanzbewertung bei GIRT : ein Werkstattbericht (2006) 0.01 
    0.011474612 = product of:
  0.04589845 = sum of:
    0.04589845 = weight(_text_:c in 5967) [ClassicSimilarity], result of:
      0.04589845 = score(doc=5967,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.3048872 = fieldWeight in 5967, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0625 = fieldNorm(doc=5967)
  0.25 = coord(1/4)
    Source
    Effektive Information Retrieval Verfahren in Theorie und Praxis: ausgewählte und erweiterte Beiträge des Vierten Hildesheimer Evaluierungs- und Retrievalworkshop (HIER 2005), Hildesheim, 20.7.2005. Hrsg.: T. Mandl u. C. Womser-Hacker
  10. Mandl, T.: Neue Entwicklungen bei den Evaluierungsinitiativen im Information Retrieval (2006) 0.01 
    0.011474612 = product of:
  0.04589845 = sum of:
    0.04589845 = weight(_text_:c in 5975) [ClassicSimilarity], result of:
      0.04589845 = score(doc=5975,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.3048872 = fieldWeight in 5975, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0625 = fieldNorm(doc=5975)
  0.25 = coord(1/4)
    Source
    Effektive Information Retrieval Verfahren in Theorie und Praxis: ausgewählte und erweiterte Beiträge des Vierten Hildesheimer Evaluierungs- und Retrievalworkshop (HIER 2005), Hildesheim, 20.7.2005. Hrsg.: T. Mandl u. C. Womser-Hacker
  11. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.01 
    0.010347793 = product of:
  0.04139117 = sum of:
    0.04139117 = product of:
      0.08278234 = sum of:
        0.08278234 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
          0.08278234 = score(doc=6438,freq=2.0), product of:
            0.15283036 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.043643 = 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)
  0.25 = coord(1/4)
    Date
    11. 8.2001 16:22:19
  12. Wolff, C.: Leistungsvergleich der Retrievaloberflächen zwischen Web und klassischen Expertensystemen (2001) 0.01 
    0.010040285 = product of:
  0.04016114 = sum of:
    0.04016114 = weight(_text_:c in 5870) [ClassicSimilarity], result of:
      0.04016114 = score(doc=5870,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.2667763 = fieldWeight in 5870, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0546875 = fieldNorm(doc=5870)
  0.25 = coord(1/4)
  13. Kluck, M.; Mandl, T.; Womser-Hacker, C.: Cross-Language Evaluation Forum (CLEF) : Europäische Initiative zur Bewertung sprachübergreifender Retrievalverfahren (2002) 0.01 
    0.010040285 = product of:
  0.04016114 = sum of:
    0.04016114 = weight(_text_:c in 266) [ClassicSimilarity], result of:
      0.04016114 = score(doc=266,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.2667763 = fieldWeight in 266, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0546875 = fieldNorm(doc=266)
  0.25 = coord(1/4)
  14. Wien, C.: Sample sizes and composition : their effect on recall and precision in IR experiments with OPACs (2000) 0.01 
    0.010040285 = product of:
  0.04016114 = sum of:
    0.04016114 = weight(_text_:c in 5368) [ClassicSimilarity], result of:
      0.04016114 = score(doc=5368,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.2667763 = fieldWeight in 5368, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0546875 = fieldNorm(doc=5368)
  0.25 = coord(1/4)
  15. Lioma, C.; Ounis, I.: ¬A syntactically-based query reformulation technique for information retrieval (2008) 0.01 
    0.009937307 = product of:
  0.039749227 = sum of:
    0.039749227 = weight(_text_:c in 2031) [ClassicSimilarity], result of:
      0.039749227 = score(doc=2031,freq=6.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.26404008 = fieldWeight in 2031, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.03125 = fieldNorm(doc=2031)
  0.25 = coord(1/4)
    Abstract
    Whereas in language words of high frequency are generally associated with low content [Bookstein, A., & Swanson, D. (1974). Probabilistic models for automatic indexing. Journal of the American Society of Information Science, 25(5), 312-318; Damerau, F. J. (1965). An experiment in automatic indexing. American Documentation, 16, 283-289; Harter, S. P. (1974). A probabilistic approach to automatic keyword indexing. PhD thesis, University of Chicago; Sparck-Jones, K. (1972). A statistical interpretation of term specificity and its application in retrieval. Journal of Documentation, 28, 11-21; Yu, C., & Salton, G. (1976). Precision weighting - an effective automatic indexing method. Journal of the Association for Computer Machinery (ACM), 23(1), 76-88], shallow syntactic fragments of high frequency generally correspond to lexical fragments of high content [Lioma, C., & Ounis, I. (2006). Examining the content load of part of speech blocks for information retrieval. In Proceedings of the international committee on computational linguistics and the association for computational linguistics (COLING/ACL 2006), Sydney, Australia]. We implement this finding to Information Retrieval, as follows. We present a novel automatic query reformulation technique, which is based on shallow syntactic evidence induced from various language samples, and used to enhance the performance of an Information Retrieval system. Firstly, we draw shallow syntactic evidence from language samples of varying size, and compare the effect of language sample size upon retrieval performance, when using our syntactically-based query reformulation (SQR) technique. Secondly, we compare SQR to a state-of-the-art probabilistic pseudo-relevance feedback technique. Additionally, we combine both techniques and evaluate their compatibility. We evaluate our proposed technique across two standard Text REtrieval Conference (TREC) English test collections, and three statistically different weighting models. Experimental results suggest that SQR markedly enhances retrieval performance, and is at least comparable to pseudo-relevance feedback. Notably, the combination of SQR and pseudo-relevance feedback further enhances retrieval performance considerably. These collective experimental results confirm the tenet that high frequency shallow syntactic fragments correspond to content-bearing lexical fragments.
  16. Ferret, O.; Grau, B.; Hurault-Plantet, M.; Illouz, G.; Jacquemin, C.; Monceaux, L.; Robba, I.; Vilnat, A.: How NLP can improve question answering (2002) 0.01 
    0.00860596 = product of:
  0.03442384 = sum of:
    0.03442384 = weight(_text_:c in 1850) [ClassicSimilarity], result of:
      0.03442384 = score(doc=1850,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.22866541 = fieldWeight in 1850, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.046875 = fieldNorm(doc=1850)
  0.25 = coord(1/4)
  17. Beall, J.; Kafadar, K.: Measuring typographical errors' impact on retrieval in bibliographic databases (2007) 0.01 
    0.00860596 = product of:
  0.03442384 = sum of:
    0.03442384 = weight(_text_:c in 261) [ClassicSimilarity], result of:
      0.03442384 = score(doc=261,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.22866541 = fieldWeight in 261, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.046875 = fieldNorm(doc=261)
  0.25 = coord(1/4)
    Footnote
    Simultaneously published as Cataloger, Editor, and Scholar: Essays in Honor of Ruth C. Carter
  18. Blandford, A.; Adams, A.; Attfield, S.; Buchanan, G.; Gow, J.; Makri, S.; Rimmer, J.; Warwick, C.: ¬The PRET A Rapporter framework : evaluating digital libraries from the perspective of information work (2008) 0.01 
    0.00860596 = product of:
  0.03442384 = sum of:
    0.03442384 = weight(_text_:c in 2021) [ClassicSimilarity], result of:
      0.03442384 = score(doc=2021,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.22866541 = fieldWeight in 2021, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.046875 = fieldNorm(doc=2021)
  0.25 = coord(1/4)
  19. Fraser, L.; Locatis, C.: Effects of link annotations on search performance in layered and unlayered hierarchically organized information spaces (2001) 0.01 
    0.0071716327 = product of:
  0.02868653 = sum of:
    0.02868653 = weight(_text_:c in 6937) [ClassicSimilarity], result of:
      0.02868653 = score(doc=6937,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.1905545 = fieldWeight in 6937, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0390625 = fieldNorm(doc=6937)
  0.25 = coord(1/4)
  20. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.01 
    0.0071716327 = product of:
  0.02868653 = sum of:
    0.02868653 = weight(_text_:c in 5154) [ClassicSimilarity], result of:
      0.02868653 = score(doc=5154,freq=2.0), product of:
        0.1505424 = queryWeight, product of:
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.043643 = queryNorm
        0.1905545 = fieldWeight in 5154, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.4494052 = idf(docFreq=3817, maxDocs=44218)
          0.0390625 = fieldNorm(doc=5154)
  0.25 = coord(1/4)

Authors

Languages

  • e 20
  • d 6
  • m 1
  • More… Less…

Types

Themes