Document (#32384)

Author
Edelman, B.
Title
Assessing and improving the safety of Internet search engines
Source
Macht der Suchmaschinen: The Power of Search Engines. Hrsg.: Machill, M. u. M. Beiler
Imprint
Köln : Halem
Year
2007
Pages
S.259-277
Abstract
Where Internet users go, attackers follow. Users embrace e-mail; then spammers fill their inboxes with junk mail. With the rise in online commerce, phishers trick them into giving up their passwords. Users find handy downloadable applications; adware vendors bundle them with pop-up-spewing add-ons. The rise of Internet search brings a new type of risk. Hostile Web sites might seek to harm users or take advantage of them - whether through spyware, spam, scams, or other bad practices - because search engines often do not filter these sites from their results. Consider this scenario: Suzy wants to perform Beyonce's Crazy in Love for her school talent show. To make sure she dresses the part, she performs a Google search for >celebrity photos<. When she clicks the first search result, celebritypictures.duble.com, she is quickly prompted to install an adware-bundled ActiveX control in order to browse the site's contents. Eager to view photos of her celebrity role model, she accepts the installation of a new browser toolbar and a pop-up serving adware program. In principle, search engines' listing rules, ranking rules, and advertising policies might shield users from some bad practices, and users' good judgment could protect them from others. But empirically, search engines often lead users to dangerous content. My analysis of search engine safety finds bad practices among approximately 5% of search results for popular keywords, or roughly one site per page of search results.
Theme
Suchmaschinen

Similar documents (author)

  1. Edelman, G.M.: ¬Das Licht des Geistes : Wie Bewusstsein entsteht (2004) 6.10 
    6.0972233 = sum of:
  6.0972233 = weight(author_txt:edelman in 4127) [ClassicSimilarity], result of:
    6.0972233 = fieldWeight in 4127, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      9.755557 = idf(docFreq=6, maxDocs=44421)
      0.625 = fieldNorm(doc=4127)
  2. Edelman, G.M.: Unser Gehirn - ein dynamisches System : die Theorie des neuronalen Darwinismus und die biologischen Grundlagen der Wahrnehmung (1993) 6.10 
    6.0972233 = sum of:
  6.0972233 = weight(author_txt:edelman in 1304) [ClassicSimilarity], result of:
    6.0972233 = fieldWeight in 1304, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      9.755557 = idf(docFreq=6, maxDocs=44421)
      0.625 = fieldNorm(doc=1304)
  3. Edelman, G.M.: Göttliche Luft, vernichtendes Feuer : wie der Geist im Gehirn entsteht - die revolutionäre Vision des Medizin-Nobelpreisträgers (1995) 6.10 
    6.0972233 = sum of:
  6.0972233 = weight(author_txt:edelman in 298) [ClassicSimilarity], result of:
    6.0972233 = fieldWeight in 298, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      9.755557 = idf(docFreq=6, maxDocs=44421)
      0.625 = fieldNorm(doc=298)
  4. Edelman, G.M.; Tononi, G.: Gehirn und Geist : Wie aus Materie Bewusstsein entsteht (2002) 4.88 
    4.8777785 = sum of:
  4.8777785 = weight(author_txt:edelman in 3416) [ClassicSimilarity], result of:
    4.8777785 = fieldWeight in 3416, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      9.755557 = idf(docFreq=6, maxDocs=44421)
      0.5 = fieldNorm(doc=3416)
  5. Edelman, G.M.; Gally, J.A.; Baars, B.J.: Biology of consciousness (2011) 3.66 
    3.6583338 = sum of:
  3.6583338 = weight(author_txt:edelman in 297) [ClassicSimilarity], result of:
    3.6583338 = fieldWeight in 297, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      9.755557 = idf(docFreq=6, maxDocs=44421)
      0.375 = fieldNorm(doc=297)

Similar documents (content)

  1. Zorn, P.: Advanced web searching : tricks of the trade (1996) 0.18 
    0.18369211 = sum of:
  0.18369211 = product of:
    0.76538384 = sum of:
      0.026690831 = weight(abstract_txt:their in 5210) [ClassicSimilarity], result of:
        0.026690831 = score(doc=5210,freq=1.0), product of:
          0.06773488 = queryWeight, product of:
            1.0435596 = boost
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.020589957 = queryNorm
          0.39404854 = fieldWeight in 5210, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
      0.08965699 = weight(abstract_txt:sites in 5210) [ClassicSimilarity], result of:
        0.08965699 = score(doc=5210,freq=1.0), product of:
          0.13271804 = queryWeight, product of:
            1.1926978 = boost
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.020589957 = queryNorm
          0.6755448 = fieldWeight in 5210, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
      0.04416723 = weight(abstract_txt:internet in 5210) [ClassicSimilarity], result of:
        0.04416723 = score(doc=5210,freq=1.0), product of:
          0.09476277 = queryWeight, product of:
            1.2343261 = boost
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.020589957 = queryNorm
          0.4660821 = fieldWeight in 5210, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
      0.089838274 = weight(abstract_txt:them in 5210) [ClassicSimilarity], result of:
        0.089838274 = score(doc=5210,freq=1.0), product of:
          0.1674396 = queryWeight, product of:
            1.894565 = boost
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.020589957 = queryNorm
          0.5365414 = fieldWeight in 5210, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
      0.23778112 = weight(abstract_txt:engines in 5210) [ClassicSimilarity], result of:
        0.23778112 = score(doc=5210,freq=2.0), product of:
          0.25428778 = queryWeight, product of:
            2.334765 = boost
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.020589957 = queryNorm
          0.9350867 = fieldWeight in 5210, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
      0.27724937 = weight(abstract_txt:search in 5210) [ClassicSimilarity], result of:
        0.27724937 = score(doc=5210,freq=4.0), product of:
          0.30345264 = queryWeight, product of:
            4.0326996 = boost
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.020589957 = queryNorm
          0.9136495 = fieldWeight in 5210, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.125 = fieldNorm(doc=5210)
    0.24 = coord(6/25)
  2. Kennedy, S.D.: How to find subjects and subject experts (1996) 0.18 
    0.17955486 = sum of:
  0.17955486 = product of:
    0.7481453 = sum of:
      0.12679411 = weight(abstract_txt:sites in 4599) [ClassicSimilarity], result of:
        0.12679411 = score(doc=4599,freq=2.0), product of:
          0.13271804 = queryWeight, product of:
            1.1926978 = boost
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.020589957 = queryNorm
          0.9553646 = fieldWeight in 4599, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
      0.04416723 = weight(abstract_txt:internet in 4599) [ClassicSimilarity], result of:
        0.04416723 = score(doc=4599,freq=1.0), product of:
          0.09476277 = queryWeight, product of:
            1.2343261 = boost
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.020589957 = queryNorm
          0.4660821 = fieldWeight in 4599, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
      0.12316408 = weight(abstract_txt:mail in 4599) [ClassicSimilarity], result of:
        0.12316408 = score(doc=4599,freq=1.0), product of:
          0.16400734 = queryWeight, product of:
            1.3258581 = boost
            6.0077353 = idf(docFreq=296, maxDocs=44421)
            0.020589957 = queryNorm
          0.7509669 = fieldWeight in 4599, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.0077353 = idf(docFreq=296, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
      0.089838274 = weight(abstract_txt:them in 4599) [ClassicSimilarity], result of:
        0.089838274 = score(doc=4599,freq=1.0), product of:
          0.1674396 = queryWeight, product of:
            1.894565 = boost
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.020589957 = queryNorm
          0.5365414 = fieldWeight in 4599, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
      0.16813666 = weight(abstract_txt:engines in 4599) [ClassicSimilarity], result of:
        0.16813666 = score(doc=4599,freq=1.0), product of:
          0.25428778 = queryWeight, product of:
            2.334765 = boost
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.020589957 = queryNorm
          0.6612062 = fieldWeight in 4599, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
      0.1960449 = weight(abstract_txt:search in 4599) [ClassicSimilarity], result of:
        0.1960449 = score(doc=4599,freq=2.0), product of:
          0.30345264 = queryWeight, product of:
            4.0326996 = boost
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.020589957 = queryNorm
          0.6460478 = fieldWeight in 4599, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.125 = fieldNorm(doc=4599)
    0.24 = coord(6/25)
  3. Shi, X.; Yang, C.C.: Mining related queries from Web search engine query logs using an improved association rule mining model (2007) 0.17 
    0.17483646 = sum of:
  0.17483646 = product of:
    0.54636395 = sum of:
      0.026690831 = weight(abstract_txt:their in 1597) [ClassicSimilarity], result of:
        0.026690831 = score(doc=1597,freq=4.0), product of:
          0.06773488 = queryWeight, product of:
            1.0435596 = boost
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.020589957 = queryNorm
          0.39404854 = fieldWeight in 1597, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.030860972 = weight(abstract_txt:often in 1597) [ClassicSimilarity], result of:
        0.030860972 = score(doc=1597,freq=1.0), product of:
          0.10347457 = queryWeight, product of:
            1.0531306 = boost
            4.7719507 = idf(docFreq=1021, maxDocs=44421)
            0.020589957 = queryNorm
          0.29824692 = fieldWeight in 1597, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.7719507 = idf(docFreq=1021, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.017932612 = weight(abstract_txt:results in 1597) [ClassicSimilarity], result of:
        0.017932612 = score(doc=1597,freq=1.0), product of:
          0.08248089 = queryWeight, product of:
            1.151563 = boost
            3.4786456 = idf(docFreq=3724, maxDocs=44421)
            0.020589957 = queryNorm
          0.21741535 = fieldWeight in 1597, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4786456 = idf(docFreq=3724, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.04082509 = weight(abstract_txt:rules in 1597) [ClassicSimilarity], result of:
        0.04082509 = score(doc=1597,freq=1.0), product of:
          0.12469393 = queryWeight, product of:
            1.1560805 = boost
            5.238438 = idf(docFreq=640, maxDocs=44421)
            0.020589957 = queryNorm
          0.32740238 = fieldWeight in 1597, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.238438 = idf(docFreq=640, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.044919137 = weight(abstract_txt:them in 1597) [ClassicSimilarity], result of:
        0.044919137 = score(doc=1597,freq=1.0), product of:
          0.1674396 = queryWeight, product of:
            1.894565 = boost
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.020589957 = queryNorm
          0.2682707 = fieldWeight in 1597, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.14561062 = weight(abstract_txt:engines in 1597) [ClassicSimilarity], result of:
        0.14561062 = score(doc=1597,freq=3.0), product of:
          0.25428778 = queryWeight, product of:
            2.334765 = boost
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.020589957 = queryNorm
          0.57262135 = fieldWeight in 1597, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.100900024 = weight(abstract_txt:users in 1597) [ClassicSimilarity], result of:
        0.100900024 = score(doc=1597,freq=5.0), product of:
          0.20238924 = queryWeight, product of:
            2.7554538 = boost
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.020589957 = queryNorm
          0.49854442 = fieldWeight in 1597, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
      0.13862468 = weight(abstract_txt:search in 1597) [ClassicSimilarity], result of:
        0.13862468 = score(doc=1597,freq=4.0), product of:
          0.30345264 = queryWeight, product of:
            4.0326996 = boost
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.020589957 = queryNorm
          0.45682475 = fieldWeight in 1597, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.0625 = fieldNorm(doc=1597)
    0.32 = coord(8/25)
  4. Couvering, E. van: ¬The economy of navigation : search engines, search optimisation and search results (2007) 0.17 
    0.17139484 = sum of:
  0.17139484 = product of:
    0.5356089 = sum of:
      0.04231036 = weight(abstract_txt:might in 1379) [ClassicSimilarity], result of:
        0.04231036 = score(doc=1379,freq=1.0), product of:
          0.12770024 = queryWeight, product of:
            1.1699338 = boost
            5.30121 = idf(docFreq=601, maxDocs=44421)
            0.020589957 = queryNorm
          0.33132562 = fieldWeight in 1379, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.30121 = idf(docFreq=601, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.044828493 = weight(abstract_txt:sites in 1379) [ClassicSimilarity], result of:
        0.044828493 = score(doc=1379,freq=1.0), product of:
          0.13271804 = queryWeight, product of:
            1.1926978 = boost
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.020589957 = queryNorm
          0.3377724 = fieldWeight in 1379, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.04416723 = weight(abstract_txt:internet in 1379) [ClassicSimilarity], result of:
        0.04416723 = score(doc=1379,freq=4.0), product of:
          0.09476277 = queryWeight, product of:
            1.2343261 = boost
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.020589957 = queryNorm
          0.4660821 = fieldWeight in 1379, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.7286568 = idf(docFreq=2900, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.056744583 = weight(abstract_txt:practices in 1379) [ClassicSimilarity], result of:
        0.056744583 = score(doc=1379,freq=1.0), product of:
          0.17777632 = queryWeight, product of:
            1.6906278 = boost
            5.107054 = idf(docFreq=730, maxDocs=44421)
            0.020589957 = queryNorm
          0.3191909 = fieldWeight in 1379, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.107054 = idf(docFreq=730, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.044919137 = weight(abstract_txt:them in 1379) [ClassicSimilarity], result of:
        0.044919137 = score(doc=1379,freq=1.0), product of:
          0.1674396 = queryWeight, product of:
            1.894565 = boost
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.020589957 = queryNorm
          0.2682707 = fieldWeight in 1379, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.11889056 = weight(abstract_txt:engines in 1379) [ClassicSimilarity], result of:
        0.11889056 = score(doc=1379,freq=2.0), product of:
          0.25428778 = queryWeight, product of:
            2.334765 = boost
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.020589957 = queryNorm
          0.46754336 = fieldWeight in 1379, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.045123864 = weight(abstract_txt:users in 1379) [ClassicSimilarity], result of:
        0.045123864 = score(doc=1379,freq=1.0), product of:
          0.20238924 = queryWeight, product of:
            2.7554538 = boost
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.020589957 = queryNorm
          0.22295584 = fieldWeight in 1379, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
      0.13862468 = weight(abstract_txt:search in 1379) [ClassicSimilarity], result of:
        0.13862468 = score(doc=1379,freq=4.0), product of:
          0.30345264 = queryWeight, product of:
            4.0326996 = boost
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.020589957 = queryNorm
          0.45682475 = fieldWeight in 1379, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.0625 = fieldNorm(doc=1379)
    0.32 = coord(8/25)
  5. Materska, K.: Faceted navigation in search and discovery tools (2014) 0.17 
    0.1711874 = sum of:
  0.1711874 = product of:
    0.5349606 = sum of:
      0.014154951 = weight(abstract_txt:their in 2435) [ClassicSimilarity], result of:
        0.014154951 = score(doc=2435,freq=2.0), product of:
          0.06773488 = queryWeight, product of:
            1.0435596 = boost
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.020589957 = queryNorm
          0.20897579 = fieldWeight in 2435, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.1523883 = idf(docFreq=5161, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.02314573 = weight(abstract_txt:often in 2435) [ClassicSimilarity], result of:
        0.02314573 = score(doc=2435,freq=1.0), product of:
          0.10347457 = queryWeight, product of:
            1.0531306 = boost
            4.7719507 = idf(docFreq=1021, maxDocs=44421)
            0.020589957 = queryNorm
          0.22368519 = fieldWeight in 2435, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.7719507 = idf(docFreq=1021, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.019020407 = weight(abstract_txt:results in 2435) [ClassicSimilarity], result of:
        0.019020407 = score(doc=2435,freq=2.0), product of:
          0.08248089 = queryWeight, product of:
            1.151563 = boost
            3.4786456 = idf(docFreq=3724, maxDocs=44421)
            0.020589957 = queryNorm
          0.23060378 = fieldWeight in 2435, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4786456 = idf(docFreq=3724, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.04754779 = weight(abstract_txt:sites in 2435) [ClassicSimilarity], result of:
        0.04754779 = score(doc=2435,freq=2.0), product of:
          0.13271804 = queryWeight, product of:
            1.1926978 = boost
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.020589957 = queryNorm
          0.3582617 = fieldWeight in 2435, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.4043584 = idf(docFreq=542, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.04764394 = weight(abstract_txt:them in 2435) [ClassicSimilarity], result of:
        0.04764394 = score(doc=2435,freq=2.0), product of:
          0.1674396 = queryWeight, product of:
            1.894565 = boost
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.020589957 = queryNorm
          0.28454405 = fieldWeight in 2435, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.292331 = idf(docFreq=1650, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.08916792 = weight(abstract_txt:engines in 2435) [ClassicSimilarity], result of:
        0.08916792 = score(doc=2435,freq=2.0), product of:
          0.25428778 = queryWeight, product of:
            2.334765 = boost
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.020589957 = queryNorm
          0.35065752 = fieldWeight in 2435, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.2896495 = idf(docFreq=608, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.0676858 = weight(abstract_txt:users in 2435) [ClassicSimilarity], result of:
        0.0676858 = score(doc=2435,freq=4.0), product of:
          0.20238924 = queryWeight, product of:
            2.7554538 = boost
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.020589957 = queryNorm
          0.33443376 = fieldWeight in 2435, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.5672934 = idf(docFreq=3408, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
      0.22659412 = weight(abstract_txt:search in 2435) [ClassicSimilarity], result of:
        0.22659412 = score(doc=2435,freq=19.0), product of:
          0.30345264 = queryWeight, product of:
            4.0326996 = boost
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.020589957 = queryNorm
          0.7467199 = fieldWeight in 2435, product of:
            4.358899 = tf(freq=19.0), with freq of:
              19.0 = termFreq=19.0
            3.654598 = idf(docFreq=3123, maxDocs=44421)
            0.046875 = fieldNorm(doc=2435)
    0.32 = coord(8/25)