Document (#42043)

Author
Yilmaz, T.
Ozcan, R.
Altingovde, I.S.
Ulusoy, Ö.
Title
Improving educational web search for question-like queries through subject classification
Source
Information processing and management. 56(2019) no.1, S.228-246
Year
2019
Abstract
Students use general web search engines as their primary source of research while trying to find answers to school-related questions. Although search engines are highly relevant for the general population, they may return results that are out of educational context. Another rising trend; social community question answering websites are the second choice for students who try to get answers from other peers online. We attempt discovering possible improvements in educational search by leveraging both of these information sources. For this purpose, we first implement a classifier for educational questions. This classifier is built by an ensemble method that employs several regular learning algorithms and retrieval based approaches that utilize external resources. We also build a query expander to facilitate classification. We further improve the classification using search engine results and obtain 83.5% accuracy. Although our work is entirely based on the Turkish language, the features could easily be mapped to other languages as well. In order to find out whether search engine ranking can be improved in the education domain using the classification model, we collect and label a set of query results retrieved from a general web search engine. We propose five ad-hoc methods to improve search ranking based on the idea that the query-document category relation is an indicator of relevance. We evaluate these methods for overall performance, varying query length and based on factoid and non-factoid queries. We show that some of the methods significantly improve the rankings in the education domain.
Content
Vgl.: https://doi.org/10.1016/j.ipm.2018.10.013.
Theme
Automatisches Klassifizieren

Similar documents (author)

  1. Altingovde, I. Sengor => Sengor Altingovde, I.: 5.23
    5.2349577 = sum of:
      5.2349577 = weight(author_txt:altingovde in 135) [ClassicSimilarity], result of:
        5.2349577 = fieldWeight in 135, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          9.871131 = idf(docFreq=5, maxDocs=42740)
          0.375 = fieldNorm(doc=135)
    
  2. Ozdemiray, A.M.; Altingovde, I.S.: Explicit search result diversification using score and rank aggregation methods (2015) 4.94
    4.9355655 = sum of:
      4.9355655 = weight(author_txt:altingovde in 3857) [ClassicSimilarity], result of:
        4.9355655 = fieldWeight in 3857, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.871131 = idf(docFreq=5, maxDocs=42740)
          0.5 = fieldNorm(doc=3857)
    
  3. Ozcan, R.; Altingovde, I.S.; Ulusoy, O.: Exploiting navigational queries for result presentation and caching in Web search engines (2011) 3.70
    3.701674 = sum of:
      3.701674 = weight(author_txt:altingovde in 1365) [ClassicSimilarity], result of:
        3.701674 = fieldWeight in 1365, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.871131 = idf(docFreq=5, maxDocs=42740)
          0.375 = fieldNorm(doc=1365)
    
  4. Sarigil, E.; Sengor Altingovde, I.; Blanco, R.; Barla Cambazoglu, B.; Ozcan, R.; Ulusoy, Ö.: Characterizing, predicting, and handling web search queries that match very few or no results (2018) 2.47
    2.4677827 = sum of:
      2.4677827 = weight(author_txt:altingovde in 40) [ClassicSimilarity], result of:
        2.4677827 = fieldWeight in 40, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.871131 = idf(docFreq=5, maxDocs=42740)
          0.25 = fieldNorm(doc=40)
    

Similar documents (content)

  1. Spink, A.; Ozmultu, H.C.: Characteristics of question format web queries : an exploratory study (2002) 0.44
    0.43640566 = sum of:
      0.43640566 = product of:
        0.99183106 = sum of:
          0.041622065 = weight(abstract_txt:find in 4911) [ClassicSimilarity], result of:
            0.041622065 = score(doc=4911,freq=1.0), product of:
              0.13548562 = queryWeight, product of:
                1.0977982 = boost
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.025108472 = queryNorm
              0.3072065 = fieldWeight in 4911, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.04174173 = weight(abstract_txt:questions in 4911) [ClassicSimilarity], result of:
            0.04174173 = score(doc=4911,freq=1.0), product of:
              0.13574518 = queryWeight, product of:
                1.0988493 = boost
                4.92001 = idf(docFreq=847, maxDocs=42740)
                0.025108472 = queryNorm
              0.30750063 = fieldWeight in 4911, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.92001 = idf(docFreq=847, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.17285727 = weight(abstract_txt:queries in 4911) [ClassicSimilarity], result of:
            0.17285727 = score(doc=4911,freq=14.0), product of:
              0.14524233 = queryWeight, product of:
                1.136639 = boost
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.025108472 = queryNorm
              1.1901301 = fieldWeight in 4911, product of:
                3.7416575 = tf(freq=14.0), with freq of:
                  14.0 = termFreq=14.0
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.19472185 = weight(abstract_txt:question in 4911) [ClassicSimilarity], result of:
            0.19472185 = score(doc=4911,freq=15.0), product of:
              0.15367037 = queryWeight, product of:
                1.169152 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.025108472 = queryNorm
              1.2671398 = fieldWeight in 4911, product of:
                3.8729835 = tf(freq=15.0), with freq of:
                  15.0 = termFreq=15.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.022680916 = weight(abstract_txt:results in 4911) [ClassicSimilarity], result of:
            0.022680916 = score(doc=4911,freq=1.0), product of:
              0.10347012 = queryWeight, product of:
                1.1749761 = boost
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.025108472 = queryNorm
              0.21920258 = fieldWeight in 4911, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.07378723 = weight(abstract_txt:engines in 4911) [ClassicSimilarity], result of:
            0.07378723 = score(doc=4911,freq=2.0), product of:
              0.15751489 = queryWeight, product of:
                1.1836866 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.025108472 = queryNorm
              0.46844608 = fieldWeight in 4911, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.01701603 = weight(abstract_txt:that in 4911) [ClassicSimilarity], result of:
            0.01701603 = score(doc=4911,freq=2.0), product of:
              0.08039326 = queryWeight, product of:
                1.337075 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.025108472 = queryNorm
              0.21165991 = fieldWeight in 4911, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.043185167 = weight(abstract_txt:general in 4911) [ClassicSimilarity], result of:
            0.043185167 = score(doc=4911,freq=1.0), product of:
              0.15895137 = queryWeight, product of:
                1.4563096 = boost
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.025108472 = queryNorm
              0.27168792 = fieldWeight in 4911, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.08826105 = weight(abstract_txt:engine in 4911) [ClassicSimilarity], result of:
            0.08826105 = score(doc=4911,freq=1.0), product of:
              0.2559886 = queryWeight, product of:
                1.8481272 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.025108472 = queryNorm
              0.3447851 = fieldWeight in 4911, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.12875834 = weight(abstract_txt:query in 4911) [ClassicSimilarity], result of:
            0.12875834 = score(doc=4911,freq=3.0), product of:
              0.2512835 = queryWeight, product of:
                2.1143308 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.025108472 = queryNorm
              0.5124027 = fieldWeight in 4911, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
          0.16719936 = weight(abstract_txt:search in 4911) [ClassicSimilarity], result of:
            0.16719936 = score(doc=4911,freq=6.0), product of:
              0.29909107 = queryWeight, product of:
                3.262178 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.025108472 = queryNorm
              0.55902493 = fieldWeight in 4911, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0625 = fieldNorm(doc=4911)
        0.44 = coord(11/25)
    
  2. Radev, D.; Fan, W.; Qu, H.; Wu, H.; Grewal, A.: Probabilistic question answering on the Web (2005) 0.38
    0.38283595 = sum of:
      0.38283595 = product of:
        0.8700817 = sum of:
          0.05217716 = weight(abstract_txt:questions in 4456) [ClassicSimilarity], result of:
            0.05217716 = score(doc=4456,freq=1.0), product of:
              0.13574518 = queryWeight, product of:
                1.0988493 = boost
                4.92001 = idf(docFreq=847, maxDocs=42740)
                0.025108472 = queryNorm
              0.38437578 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.92001 = idf(docFreq=847, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.10885281 = weight(abstract_txt:question in 4456) [ClassicSimilarity], result of:
            0.10885281 = score(doc=4456,freq=3.0), product of:
              0.15367037 = queryWeight, product of:
                1.169152 = boost
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.025108472 = queryNorm
              0.7083526 = fieldWeight in 4456, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.234785 = idf(docFreq=618, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.028351143 = weight(abstract_txt:results in 4456) [ClassicSimilarity], result of:
            0.028351143 = score(doc=4456,freq=1.0), product of:
              0.10347012 = queryWeight, product of:
                1.1749761 = boost
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.025108472 = queryNorm
              0.2740032 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.11296317 = weight(abstract_txt:engines in 4456) [ClassicSimilarity], result of:
            0.11296317 = score(doc=4456,freq=3.0), product of:
              0.15751489 = queryWeight, product of:
                1.1836866 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.025108472 = queryNorm
              0.7171587 = fieldWeight in 4456, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.07690213 = weight(abstract_txt:ranking in 4456) [ClassicSimilarity], result of:
            0.07690213 = score(doc=4456,freq=1.0), product of:
              0.17580438 = queryWeight, product of:
                1.2505203 = boost
                5.5991054 = idf(docFreq=429, maxDocs=42740)
                0.025108472 = queryNorm
              0.4374301 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5991054 = idf(docFreq=429, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.026050372 = weight(abstract_txt:that in 4456) [ClassicSimilarity], result of:
            0.026050372 = score(doc=4456,freq=3.0), product of:
              0.08039326 = queryWeight, product of:
                1.337075 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.025108472 = queryNorm
              0.32403675 = fieldWeight in 4456, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.04773306 = weight(abstract_txt:methods in 4456) [ClassicSimilarity], result of:
            0.04773306 = score(doc=4456,freq=1.0), product of:
              0.14643584 = queryWeight, product of:
                1.3978007 = boost
                4.172361 = idf(docFreq=1790, maxDocs=42740)
                0.025108472 = queryNorm
              0.3259657 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.172361 = idf(docFreq=1790, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.108902946 = weight(abstract_txt:answers in 4456) [ClassicSimilarity], result of:
            0.108902946 = score(doc=4456,freq=1.0), product of:
              0.22169906 = queryWeight, product of:
                1.4042934 = boost
                6.287612 = idf(docFreq=215, maxDocs=42740)
                0.025108472 = queryNorm
              0.4912197 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.287612 = idf(docFreq=215, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.028950812 = weight(abstract_txt:based in 4456) [ClassicSimilarity], result of:
            0.028950812 = score(doc=4456,freq=1.0), product of:
              0.11548386 = queryWeight, product of:
                1.4333477 = boost
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.025108472 = queryNorm
              0.2506914 = fieldWeight in 4456, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.13141343 = weight(abstract_txt:query in 4456) [ClassicSimilarity], result of:
            0.13141343 = score(doc=4456,freq=2.0), product of:
              0.2512835 = queryWeight, product of:
                2.1143308 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.025108472 = queryNorm
              0.5229688 = fieldWeight in 4456, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
          0.14778475 = weight(abstract_txt:search in 4456) [ClassicSimilarity], result of:
            0.14778475 = score(doc=4456,freq=3.0), product of:
              0.29909107 = queryWeight, product of:
                3.262178 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.025108472 = queryNorm
              0.4941129 = fieldWeight in 4456, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.078125 = fieldNorm(doc=4456)
        0.44 = coord(11/25)
    
  3. Li, X.; Schijvenaars, B.J.A.; Rijke, M.de: Investigating queries and search failures in academic search (2017) 0.38
    0.37787834 = sum of:
      0.37787834 = product of:
        0.94469583 = sum of:
          0.033460237 = weight(abstract_txt:domain in 1034) [ClassicSimilarity], result of:
            0.033460237 = score(doc=1034,freq=1.0), product of:
              0.12804367 = queryWeight, product of:
                1.0672225 = boost
                4.7784038 = idf(docFreq=976, maxDocs=42740)
                0.025108472 = queryNorm
              0.26131895 = fieldWeight in 1034, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7784038 = idf(docFreq=976, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.07283861 = weight(abstract_txt:find in 1034) [ClassicSimilarity], result of:
            0.07283861 = score(doc=1034,freq=4.0), product of:
              0.13548562 = queryWeight, product of:
                1.0977982 = boost
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.025108472 = queryNorm
              0.53761137 = fieldWeight in 1034, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.1340689 = weight(abstract_txt:queries in 1034) [ClassicSimilarity], result of:
            0.1340689 = score(doc=1034,freq=11.0), product of:
              0.14524233 = queryWeight, product of:
                1.136639 = boost
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.025108472 = queryNorm
              0.92307043 = fieldWeight in 1034, product of:
                3.3166249 = tf(freq=11.0), with freq of:
                  11.0 = termFreq=11.0
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.02354162 = weight(abstract_txt:that in 1034) [ClassicSimilarity], result of:
            0.02354162 = score(doc=1034,freq=5.0), product of:
              0.08039326 = queryWeight, product of:
                1.337075 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.025108472 = queryNorm
              0.29283077 = fieldWeight in 1034, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.020265568 = weight(abstract_txt:based in 1034) [ClassicSimilarity], result of:
            0.020265568 = score(doc=1034,freq=1.0), product of:
              0.11548386 = queryWeight, product of:
                1.4333477 = boost
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.025108472 = queryNorm
              0.17548399 = fieldWeight in 1034, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.03778702 = weight(abstract_txt:general in 1034) [ClassicSimilarity], result of:
            0.03778702 = score(doc=1034,freq=1.0), product of:
              0.15895137 = queryWeight, product of:
                1.4563096 = boost
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.025108472 = queryNorm
              0.23772693 = fieldWeight in 1034, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.05551241 = weight(abstract_txt:classification in 1034) [ClassicSimilarity], result of:
            0.05551241 = score(doc=1034,freq=2.0), product of:
              0.17944533 = queryWeight, product of:
                1.7867221 = boost
                3.9999528 = idf(docFreq=2127, maxDocs=42740)
                0.025108472 = queryNorm
              0.30935556 = fieldWeight in 1034, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9999528 = idf(docFreq=2127, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.10921748 = weight(abstract_txt:engine in 1034) [ClassicSimilarity], result of:
            0.10921748 = score(doc=1034,freq=2.0), product of:
              0.2559886 = queryWeight, product of:
                1.8481272 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.025108472 = queryNorm
              0.42664978 = fieldWeight in 1034, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.2345279 = weight(abstract_txt:query in 1034) [ClassicSimilarity], result of:
            0.2345279 = score(doc=1034,freq=13.0), product of:
              0.2512835 = queryWeight, product of:
                2.1143308 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.025108472 = queryNorm
              0.9333199 = fieldWeight in 1034, product of:
                3.6055512 = tf(freq=13.0), with freq of:
                  13.0 = termFreq=13.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
          0.2234761 = weight(abstract_txt:search in 1034) [ClassicSimilarity], result of:
            0.2234761 = score(doc=1034,freq=14.0), product of:
              0.29909107 = queryWeight, product of:
                3.262178 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.025108472 = queryNorm
              0.7471841 = fieldWeight in 1034, product of:
                3.7416575 = tf(freq=14.0), with freq of:
                  14.0 = termFreq=14.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0546875 = fieldNorm(doc=1034)
        0.4 = coord(10/25)
    
  4. Vidinli, I.B.; Ozcan, R.: New query suggestion framework and algorithms : a case study for an educational search engine (2016) 0.38
    0.37769178 = sum of:
      0.37769178 = product of:
        1.0491438 = sum of:
          0.05294019 = weight(abstract_txt:students in 5186) [ClassicSimilarity], result of:
            0.05294019 = score(doc=5186,freq=1.0), product of:
              0.13706538 = queryWeight, product of:
                1.1041799 = boost
                4.943877 = idf(docFreq=827, maxDocs=42740)
                0.025108472 = queryNorm
              0.38624042 = fieldWeight in 5186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.943877 = idf(docFreq=827, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.081667386 = weight(abstract_txt:queries in 5186) [ClassicSimilarity], result of:
            0.081667386 = score(doc=5186,freq=2.0), product of:
              0.14524233 = queryWeight, product of:
                1.136639 = boost
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.025108472 = queryNorm
              0.56228364 = fieldWeight in 5186, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.06521931 = weight(abstract_txt:engines in 5186) [ClassicSimilarity], result of:
            0.06521931 = score(doc=5186,freq=1.0), product of:
              0.15751489 = queryWeight, product of:
                1.1836866 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.025108472 = queryNorm
              0.41405174 = fieldWeight in 5186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.015040189 = weight(abstract_txt:that in 5186) [ClassicSimilarity], result of:
            0.015040189 = score(doc=5186,freq=1.0), product of:
              0.08039326 = queryWeight, product of:
                1.337075 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.025108472 = queryNorm
              0.18708271 = fieldWeight in 5186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.053981464 = weight(abstract_txt:general in 5186) [ClassicSimilarity], result of:
            0.053981464 = score(doc=5186,freq=1.0), product of:
              0.15895137 = queryWeight, product of:
                1.4563096 = boost
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.025108472 = queryNorm
              0.33960992 = fieldWeight in 5186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.347007 = idf(docFreq=1503, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.11032631 = weight(abstract_txt:engine in 5186) [ClassicSimilarity], result of:
            0.11032631 = score(doc=5186,freq=1.0), product of:
              0.2559886 = queryWeight, product of:
                1.8481272 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.025108472 = queryNorm
              0.43098137 = fieldWeight in 5186, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.26282686 = weight(abstract_txt:query in 5186) [ClassicSimilarity], result of:
            0.26282686 = score(doc=5186,freq=8.0), product of:
              0.2512835 = queryWeight, product of:
                2.1143308 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.025108472 = queryNorm
              1.0459377 = fieldWeight in 5186, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.2864763 = weight(abstract_txt:educational in 5186) [ClassicSimilarity], result of:
            0.2864763 = score(doc=5186,freq=2.0), product of:
              0.4224707 = queryWeight, product of:
                2.741506 = boost
                6.137438 = idf(docFreq=250, maxDocs=42740)
                0.025108472 = queryNorm
              0.6780975 = fieldWeight in 5186, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.137438 = idf(docFreq=250, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
          0.120665744 = weight(abstract_txt:search in 5186) [ClassicSimilarity], result of:
            0.120665744 = score(doc=5186,freq=2.0), product of:
              0.29909107 = queryWeight, product of:
                3.262178 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.025108472 = queryNorm
              0.4034415 = fieldWeight in 5186, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.078125 = fieldNorm(doc=5186)
        0.36 = coord(9/25)
    
  5. Lorigo, L.; Pan, B.; Hembrooke, H.; Joachims, T.; Granka, L.; Gay, G.: ¬The influence of task and gender on search and evaluation behavior using Google (2006) 0.34
    0.33688718 = sum of:
      0.33688718 = product of:
        0.76565266 = sum of:
          0.041622065 = weight(abstract_txt:find in 2979) [ClassicSimilarity], result of:
            0.041622065 = score(doc=2979,freq=1.0), product of:
              0.13548562 = queryWeight, product of:
                1.0977982 = boost
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.025108472 = queryNorm
              0.3072065 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.915304 = idf(docFreq=851, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.04619805 = weight(abstract_txt:queries in 2979) [ClassicSimilarity], result of:
            0.04619805 = score(doc=2979,freq=1.0), product of:
              0.14524233 = queryWeight, product of:
                1.136639 = boost
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.025108472 = queryNorm
              0.31807566 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0892105 = idf(docFreq=715, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.022680916 = weight(abstract_txt:results in 2979) [ClassicSimilarity], result of:
            0.022680916 = score(doc=2979,freq=1.0), product of:
              0.10347012 = queryWeight, product of:
                1.1749761 = boost
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.025108472 = queryNorm
              0.21920258 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5072412 = idf(docFreq=3482, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.07378723 = weight(abstract_txt:engines in 2979) [ClassicSimilarity], result of:
            0.07378723 = score(doc=2979,freq=2.0), product of:
              0.15751489 = queryWeight, product of:
                1.1836866 = boost
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.025108472 = queryNorm
              0.46844608 = fieldWeight in 2979, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.2998624 = idf(docFreq=579, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.0615217 = weight(abstract_txt:ranking in 2979) [ClassicSimilarity], result of:
            0.0615217 = score(doc=2979,freq=1.0), product of:
              0.17580438 = queryWeight, product of:
                1.2505203 = boost
                5.5991054 = idf(docFreq=429, maxDocs=42740)
                0.025108472 = queryNorm
              0.34994408 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5991054 = idf(docFreq=429, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.020840297 = weight(abstract_txt:that in 2979) [ClassicSimilarity], result of:
            0.020840297 = score(doc=2979,freq=3.0), product of:
              0.08039326 = queryWeight, product of:
                1.337075 = boost
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.025108472 = queryNorm
              0.2592294 = fieldWeight in 2979, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.3946586 = idf(docFreq=10595, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.02316065 = weight(abstract_txt:based in 2979) [ClassicSimilarity], result of:
            0.02316065 = score(doc=2979,freq=1.0), product of:
              0.11548386 = queryWeight, product of:
                1.4333477 = boost
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.025108472 = queryNorm
              0.20055313 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.2088501 = idf(docFreq=4693, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.06575724 = weight(abstract_txt:improve in 2979) [ClassicSimilarity], result of:
            0.06575724 = score(doc=2979,freq=1.0), product of:
              0.21037957 = queryWeight, product of:
                1.6754186 = boost
                5.0010357 = idf(docFreq=781, maxDocs=42740)
                0.025108472 = queryNorm
              0.31256473 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0010357 = idf(docFreq=781, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.08826105 = weight(abstract_txt:engine in 2979) [ClassicSimilarity], result of:
            0.08826105 = score(doc=2979,freq=1.0), product of:
              0.2559886 = queryWeight, product of:
                1.8481272 = boost
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.025108472 = queryNorm
              0.3447851 = fieldWeight in 2979, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5165615 = idf(docFreq=466, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.12875834 = weight(abstract_txt:query in 2979) [ClassicSimilarity], result of:
            0.12875834 = score(doc=2979,freq=3.0), product of:
              0.2512835 = queryWeight, product of:
                2.1143308 = boost
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.025108472 = queryNorm
              0.5124027 = fieldWeight in 2979, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.7333736 = idf(docFreq=1021, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
          0.1930652 = weight(abstract_txt:search in 2979) [ClassicSimilarity], result of:
            0.1930652 = score(doc=2979,freq=8.0), product of:
              0.29909107 = queryWeight, product of:
                3.262178 = boost
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.025108472 = queryNorm
              0.6455064 = fieldWeight in 2979, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                3.6515355 = idf(docFreq=3014, maxDocs=42740)
                0.0625 = fieldNorm(doc=2979)
        0.44 = coord(11/25)