Document (#35347)

Author
Belew, R.K.
Title
Finding out about : a cognitive perspective on search engine technology and the WWW
Imprint
Cambridge : Cambridge University Press
Year
2001
Pages
XXVII, 356 S. + 1 CD-ROM
Isbn
0-521-63028-2
Abstract
The World Wide Web is rapidly filling with more text than anyone could have imagined even a short time ago, but the task of isolating relevant parts of this vast information has become just that much more daunting. Richard Belew brings a cognitive perspective to the study of information retrieval as a discipline within computer science. He introduces the idea of Finding Out About (FDA) as the process of actively seeking out information relevant to a topic of interest and describes its many facets - ranging from creating a good characterization of what the user seeks, to what documents actually mean, to methods of inferring semantic clues about each document, to the problem of evaluating whether our search engines are performing as we have intended. Finding Out About explains how to build the tools that are useful for searching collections of text and other media. In the process it takes a close look at the properties of textual documents that do not become clear until very large collections of them are brought together and shows that the construction of effective search engines requires knowledge of the statistical and mathematical properties of linguistic phenomena, as well as an appreciation for the cognitive foundation we bring to the task as language users. The unique approach of this book is its even handling of the phenomena of both numbers and words, making it accessible to a wide audience. The textbook is usable in both undergraduate and graduate classes on information retrieval, library science, and computational linguistics. The text is accompanied by a CD-ROM that contains a hypertext version of the book, including additional topics and notes not present in the printed edition. In addition, the CD contains the full text of C.J. "Keith" van Rijsbergen's famous textbook, Information Retrieval (now out of print). Many active links from Belew's to van Rijsbergen's hypertexts help to unite the material. Several test corpora and indexing tools are provided, to support the design of your own search engine. Additional exercises using these corpora and code are available to instructors. Also supporting this book is a Web site that will include recent additions to the book, as well as links to sites of new topics and methods.
Theme
Suchmaschinen
Grundlagen u. Einführungen: Allgemeine Literatur
LCSH
Search engines / Programming
World Wide Web / Computer programs
Web search engines
RSWK
Suchmaschine / World Wide Web / Information Retrieval
BK
54.51 / Programmiermethodik
54.32 / Rechnerkommunikation
06.74 / Informationssysteme
DDC
025.04 / dc21
LCC
TK5105.884 B45 2000
RVK
ST 273

Similar documents (content)

  1. Next generation search engines : advanced models for information retrieval (2012) 0.38
    0.3771478 = sum of:
      0.3771478 = product of:
        0.7252842 = sum of:
          0.027070543 = weight(abstract_txt:become in 357) [ClassicSimilarity], result of:
            0.027070543 = score(doc=357,freq=1.0), product of:
              0.13784608 = queryWeight, product of:
                1.0236372 = boost
                5.027389 = idf(docFreq=787, maxDocs=44218)
                0.026785878 = queryNorm
              0.19638239 = fieldWeight in 357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.027389 = idf(docFreq=787, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.039642632 = weight(abstract_txt:topics in 357) [ClassicSimilarity], result of:
            0.039642632 = score(doc=357,freq=2.0), product of:
              0.14108953 = queryWeight, product of:
                1.03561 = boost
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.026785878 = queryNorm
              0.280975 = fieldWeight in 357, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.038463492 = weight(abstract_txt:additional in 357) [ClassicSimilarity], result of:
            0.038463492 = score(doc=357,freq=1.0), product of:
              0.17421903 = queryWeight, product of:
                1.1507914 = boost
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.026785878 = queryNorm
              0.22077663 = fieldWeight in 357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.04460534 = weight(abstract_txt:contains in 357) [ClassicSimilarity], result of:
            0.04460534 = score(doc=357,freq=1.0), product of:
              0.19230373 = queryWeight, product of:
                1.2090456 = boost
                5.9379854 = idf(docFreq=316, maxDocs=44218)
                0.026785878 = queryNorm
              0.23195255 = fieldWeight in 357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9379854 = idf(docFreq=316, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.039985377 = weight(abstract_txt:retrieval in 357) [ClassicSimilarity], result of:
            0.039985377 = score(doc=357,freq=5.0), product of:
              0.13172977 = queryWeight, product of:
                1.4151608 = boost
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.026785878 = queryNorm
              0.30354095 = fieldWeight in 357, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.019012192 = weight(abstract_txt:that in 357) [ClassicSimilarity], result of:
            0.019012192 = score(doc=357,freq=5.0), product of:
              0.091861814 = queryWeight, product of:
                1.4473614 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.026785878 = queryNorm
              0.20696513 = fieldWeight in 357, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.03952966 = weight(abstract_txt:information in 357) [ClassicSimilarity], result of:
            0.03952966 = score(doc=357,freq=19.0), product of:
              0.095896125 = queryWeight, product of:
                1.4788018 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.026785878 = queryNorm
              0.41221333 = fieldWeight in 357, product of:
                4.358899 = tf(freq=19.0), with freq of:
                  19.0 = termFreq=19.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.025689382 = weight(abstract_txt:about in 357) [ClassicSimilarity], result of:
            0.025689382 = score(doc=357,freq=1.0), product of:
              0.16771641 = queryWeight, product of:
                1.596804 = boost
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.026785878 = queryNorm
              0.15317154 = fieldWeight in 357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.05635338 = weight(abstract_txt:text in 357) [ClassicSimilarity], result of:
            0.05635338 = score(doc=357,freq=4.0), product of:
              0.17837463 = queryWeight, product of:
                1.6467602 = boost
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.026785878 = queryNorm
              0.3159271 = fieldWeight in 357, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.06901476 = weight(abstract_txt:book in 357) [ClassicSimilarity], result of:
            0.06901476 = score(doc=357,freq=2.0), product of:
              0.2572514 = queryWeight, product of:
                1.9776194 = boost
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.026785878 = queryNorm
              0.26827747 = fieldWeight in 357, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.049224105 = weight(abstract_txt:wide in 357) [ClassicSimilarity], result of:
            0.049224105 = score(doc=357,freq=1.0), product of:
              0.25873688 = queryWeight, product of:
                1.983321 = boost
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.026785878 = queryNorm
              0.19024773 = fieldWeight in 357, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.15552577 = weight(abstract_txt:engines in 357) [ClassicSimilarity], result of:
            0.15552577 = score(doc=357,freq=6.0), product of:
              0.30658972 = queryWeight, product of:
                2.15895 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.026785878 = queryNorm
              0.50727654 = fieldWeight in 357, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
          0.12116751 = weight(abstract_txt:search in 357) [ClassicSimilarity], result of:
            0.12116751 = score(doc=357,freq=15.0), product of:
              0.21894276 = queryWeight, product of:
                2.234471 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.026785878 = queryNorm
              0.55342096 = fieldWeight in 357, product of:
                3.8729835 = tf(freq=15.0), with freq of:
                  15.0 = termFreq=15.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0390625 = fieldNorm(doc=357)
        0.52 = coord(13/25)
    
  2. Drabenstott, K.M.: Web search strategies (2000) 0.31
    0.31339136 = sum of:
      0.31339136 = product of:
        0.7122531 = sum of:
          0.04485052 = weight(abstract_txt:topics in 1188) [ClassicSimilarity], result of:
            0.04485052 = score(doc=1188,freq=1.0), product of:
              0.14108953 = queryWeight, product of:
                1.03561 = boost
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.026785878 = queryNorm
              0.31788695 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.057560306 = weight(abstract_txt:engine in 1188) [ClassicSimilarity], result of:
            0.057560306 = score(doc=1188,freq=1.0), product of:
              0.16662182 = queryWeight, product of:
                1.1254203 = boost
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.026785878 = queryNorm
              0.34545478 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.04449595 = weight(abstract_txt:world in 1188) [ClassicSimilarity], result of:
            0.04449595 = score(doc=1188,freq=1.0), product of:
              0.16065487 = queryWeight, product of:
                1.3534474 = boost
                4.4314575 = idf(docFreq=1429, maxDocs=44218)
                0.026785878 = queryNorm
              0.2769661 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4314575 = idf(docFreq=1429, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.028611206 = weight(abstract_txt:retrieval in 1188) [ClassicSimilarity], result of:
            0.028611206 = score(doc=1188,freq=1.0), product of:
              0.13172977 = queryWeight, product of:
                1.4151608 = boost
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.026785878 = queryNorm
              0.21719621 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.033322904 = weight(abstract_txt:that in 1188) [ClassicSimilarity], result of:
            0.033322904 = score(doc=1188,freq=6.0), product of:
              0.091861814 = queryWeight, product of:
                1.4473614 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.026785878 = queryNorm
              0.36275032 = fieldWeight in 1188, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.014509961 = weight(abstract_txt:information in 1188) [ClassicSimilarity], result of:
            0.014509961 = score(doc=1188,freq=1.0), product of:
              0.095896125 = queryWeight, product of:
                1.4788018 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.026785878 = queryNorm
              0.15130915 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.04110301 = weight(abstract_txt:about in 1188) [ClassicSimilarity], result of:
            0.04110301 = score(doc=1188,freq=1.0), product of:
              0.16771641 = queryWeight, product of:
                1.596804 = boost
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.026785878 = queryNorm
              0.24507447 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.08379098 = weight(abstract_txt:finding in 1188) [ClassicSimilarity], result of:
            0.08379098 = score(doc=1188,freq=1.0), product of:
              0.24498814 = queryWeight, product of:
                1.6713485 = boost
                5.4723287 = idf(docFreq=504, maxDocs=44218)
                0.026785878 = queryNorm
              0.34202054 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4723287 = idf(docFreq=504, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.07875857 = weight(abstract_txt:wide in 1188) [ClassicSimilarity], result of:
            0.07875857 = score(doc=1188,freq=1.0), product of:
              0.25873688 = queryWeight, product of:
                1.983321 = boost
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.026785878 = queryNorm
              0.30439636 = fieldWeight in 1188, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.14366853 = weight(abstract_txt:engines in 1188) [ClassicSimilarity], result of:
            0.14366853 = score(doc=1188,freq=2.0), product of:
              0.30658972 = queryWeight, product of:
                2.15895 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.026785878 = queryNorm
              0.46860194 = fieldWeight in 1188, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
          0.14158118 = weight(abstract_txt:search in 1188) [ClassicSimilarity], result of:
            0.14158118 = score(doc=1188,freq=8.0), product of:
              0.21894276 = queryWeight, product of:
                2.234471 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.026785878 = queryNorm
              0.6466584 = fieldWeight in 1188, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0625 = fieldNorm(doc=1188)
        0.44 = coord(11/25)
    
  3. Manning, C.D.; Raghavan, P.; Schütze, H.: Introduction to information retrieval (2008) 0.31
    0.30872607 = sum of:
      0.30872607 = product of:
        0.7718152 = sum of:
          0.05606315 = weight(abstract_txt:topics in 4041) [ClassicSimilarity], result of:
            0.05606315 = score(doc=4041,freq=1.0), product of:
              0.14108953 = queryWeight, product of:
                1.03561 = boost
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.026785878 = queryNorm
              0.3973587 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.056512434 = weight(abstract_txt:even in 4041) [ClassicSimilarity], result of:
            0.056512434 = score(doc=4041,freq=1.0), product of:
              0.14184232 = queryWeight, product of:
                1.038369 = boost
                5.0997415 = idf(docFreq=732, maxDocs=44218)
                0.026785878 = queryNorm
              0.3984173 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0997415 = idf(docFreq=732, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.076926984 = weight(abstract_txt:additional in 4041) [ClassicSimilarity], result of:
            0.076926984 = score(doc=4041,freq=1.0), product of:
              0.17421903 = queryWeight, product of:
                1.1507914 = boost
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.026785878 = queryNorm
              0.44155326 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.050577942 = weight(abstract_txt:retrieval in 4041) [ClassicSimilarity], result of:
            0.050577942 = score(doc=4041,freq=2.0), product of:
              0.13172977 = queryWeight, product of:
                1.4151608 = boost
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.026785878 = queryNorm
              0.38395226 = fieldWeight in 4041, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.02565023 = weight(abstract_txt:information in 4041) [ClassicSimilarity], result of:
            0.02565023 = score(doc=4041,freq=2.0), product of:
              0.095896125 = queryWeight, product of:
                1.4788018 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.026785878 = queryNorm
              0.2674793 = fieldWeight in 4041, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.051378764 = weight(abstract_txt:about in 4041) [ClassicSimilarity], result of:
            0.051378764 = score(doc=4041,freq=1.0), product of:
              0.16771641 = queryWeight, product of:
                1.596804 = boost
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.026785878 = queryNorm
              0.30634308 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.21483777 = weight(abstract_txt:textbook in 4041) [ClassicSimilarity], result of:
            0.21483777 = score(doc=4041,freq=1.0), product of:
              0.34550172 = queryWeight, product of:
                1.620593 = boost
                7.9592175 = idf(docFreq=41, maxDocs=44218)
                0.026785878 = queryNorm
              0.6218139 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.9592175 = idf(docFreq=41, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.07969571 = weight(abstract_txt:text in 4041) [ClassicSimilarity], result of:
            0.07969571 = score(doc=4041,freq=2.0), product of:
              0.17837463 = queryWeight, product of:
                1.6467602 = boost
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.026785878 = queryNorm
              0.44678837 = fieldWeight in 4041, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.0976016 = weight(abstract_txt:book in 4041) [ClassicSimilarity], result of:
            0.0976016 = score(doc=4041,freq=1.0), product of:
              0.2572514 = queryWeight, product of:
                1.9776194 = boost
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.026785878 = queryNorm
              0.37940162 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
          0.06257063 = weight(abstract_txt:search in 4041) [ClassicSimilarity], result of:
            0.06257063 = score(doc=4041,freq=1.0), product of:
              0.21894276 = queryWeight, product of:
                2.234471 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.026785878 = queryNorm
              0.28578535 = fieldWeight in 4041, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.078125 = fieldNorm(doc=4041)
        0.4 = coord(10/25)
    
  4. Austin, D.: How Google finds your needle in the Web's haystack : as we'll see, the trick is to ask the web itself to rank the importance of pages... (2006) 0.30
    0.30019948 = sum of:
      0.30019948 = product of:
        0.5773067 = sum of:
          0.027070543 = weight(abstract_txt:become in 93) [ClassicSimilarity], result of:
            0.027070543 = score(doc=93,freq=1.0), product of:
              0.13784608 = queryWeight, product of:
                1.0236372 = boost
                5.027389 = idf(docFreq=787, maxDocs=44218)
                0.026785878 = queryNorm
              0.19638239 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.027389 = idf(docFreq=787, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.03062686 = weight(abstract_txt:links in 93) [ClassicSimilarity], result of:
            0.03062686 = score(doc=93,freq=1.0), product of:
              0.14966886 = queryWeight, product of:
                1.0666319 = boost
                5.2385488 = idf(docFreq=637, maxDocs=44218)
                0.026785878 = queryNorm
              0.2046308 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.2385488 = idf(docFreq=637, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.062310856 = weight(abstract_txt:engine in 93) [ClassicSimilarity], result of:
            0.062310856 = score(doc=93,freq=3.0), product of:
              0.16662182 = queryWeight, product of:
                1.1254203 = boost
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.026785878 = queryNorm
              0.37396577 = fieldWeight in 93, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.038463492 = weight(abstract_txt:additional in 93) [ClassicSimilarity], result of:
            0.038463492 = score(doc=93,freq=1.0), product of:
              0.17421903 = queryWeight, product of:
                1.1507914 = boost
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.026785878 = queryNorm
              0.22077663 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6518817 = idf(docFreq=421, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.04460534 = weight(abstract_txt:contains in 93) [ClassicSimilarity], result of:
            0.04460534 = score(doc=93,freq=1.0), product of:
              0.19230373 = queryWeight, product of:
                1.2090456 = boost
                5.9379854 = idf(docFreq=316, maxDocs=44218)
                0.026785878 = queryNorm
              0.23195255 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9379854 = idf(docFreq=316, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.02780997 = weight(abstract_txt:world in 93) [ClassicSimilarity], result of:
            0.02780997 = score(doc=93,freq=1.0), product of:
              0.16065487 = queryWeight, product of:
                1.3534474 = boost
                4.4314575 = idf(docFreq=1429, maxDocs=44218)
                0.026785878 = queryNorm
              0.17310381 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4314575 = idf(docFreq=1429, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.029453563 = weight(abstract_txt:that in 93) [ClassicSimilarity], result of:
            0.029453563 = score(doc=93,freq=12.0), product of:
              0.091861814 = queryWeight, product of:
                1.4473614 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.026785878 = queryNorm
              0.320629 = fieldWeight in 93, product of:
                3.4641016 = tf(freq=12.0), with freq of:
                  12.0 = termFreq=12.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.015707495 = weight(abstract_txt:information in 93) [ClassicSimilarity], result of:
            0.015707495 = score(doc=93,freq=3.0), product of:
              0.095896125 = queryWeight, product of:
                1.4788018 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.026785878 = queryNorm
              0.16379696 = fieldWeight in 93, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.025689382 = weight(abstract_txt:about in 93) [ClassicSimilarity], result of:
            0.025689382 = score(doc=93,freq=1.0), product of:
              0.16771641 = queryWeight, product of:
                1.596804 = boost
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.026785878 = queryNorm
              0.15317154 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9211915 = idf(docFreq=2381, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.02817669 = weight(abstract_txt:text in 93) [ClassicSimilarity], result of:
            0.02817669 = score(doc=93,freq=1.0), product of:
              0.17837463 = queryWeight, product of:
                1.6467602 = boost
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.026785878 = queryNorm
              0.15796354 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.0438666 = idf(docFreq=2106, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.049224105 = weight(abstract_txt:wide in 93) [ClassicSimilarity], result of:
            0.049224105 = score(doc=93,freq=1.0), product of:
              0.25873688 = queryWeight, product of:
                1.983321 = boost
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.026785878 = queryNorm
              0.19024773 = fieldWeight in 93, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.870342 = idf(docFreq=921, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.08979284 = weight(abstract_txt:engines in 93) [ClassicSimilarity], result of:
            0.08979284 = score(doc=93,freq=2.0), product of:
              0.30658972 = queryWeight, product of:
                2.15895 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.026785878 = queryNorm
              0.2928762 = fieldWeight in 93, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
          0.10837552 = weight(abstract_txt:search in 93) [ClassicSimilarity], result of:
            0.10837552 = score(doc=93,freq=12.0), product of:
              0.21894276 = queryWeight, product of:
                2.234471 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.026785878 = queryNorm
              0.49499476 = fieldWeight in 93, product of:
                3.4641016 = tf(freq=12.0), with freq of:
                  12.0 = termFreq=12.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0390625 = fieldNorm(doc=93)
        0.52 = coord(13/25)
    
  5. Web search engine research (2012) 0.27
    0.27219948 = sum of:
      0.27219948 = product of:
        0.85062337 = sum of:
          0.05606315 = weight(abstract_txt:topics in 478) [ClassicSimilarity], result of:
            0.05606315 = score(doc=478,freq=1.0), product of:
              0.14108953 = queryWeight, product of:
                1.03561 = boost
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.026785878 = queryNorm
              0.3973587 = fieldWeight in 478, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.086191 = idf(docFreq=742, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.08570472 = weight(abstract_txt:perspective in 478) [ClassicSimilarity], result of:
            0.08570472 = score(doc=478,freq=2.0), product of:
              0.14860599 = queryWeight, product of:
                1.0628378 = boost
                5.219915 = idf(docFreq=649, maxDocs=44218)
                0.026785878 = queryNorm
              0.5767245 = fieldWeight in 478, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.219915 = idf(docFreq=649, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.1017532 = weight(abstract_txt:engine in 478) [ClassicSimilarity], result of:
            0.1017532 = score(doc=478,freq=2.0), product of:
              0.16662182 = queryWeight, product of:
                1.1254203 = boost
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.026785878 = queryNorm
              0.6106835 = fieldWeight in 478, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5272765 = idf(docFreq=477, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.035764005 = weight(abstract_txt:retrieval in 478) [ClassicSimilarity], result of:
            0.035764005 = score(doc=478,freq=1.0), product of:
              0.13172977 = queryWeight, product of:
                1.4151608 = boost
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.026785878 = queryNorm
              0.27149525 = fieldWeight in 478, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.02565023 = weight(abstract_txt:information in 478) [ClassicSimilarity], result of:
            0.02565023 = score(doc=478,freq=2.0), product of:
              0.095896125 = queryWeight, product of:
                1.4788018 = boost
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.026785878 = queryNorm
              0.2674793 = fieldWeight in 478, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4209464 = idf(docFreq=10677, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.13802952 = weight(abstract_txt:book in 478) [ClassicSimilarity], result of:
            0.13802952 = score(doc=478,freq=2.0), product of:
              0.2572514 = queryWeight, product of:
                1.9776194 = boost
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.026785878 = queryNorm
              0.53655493 = fieldWeight in 478, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.856341 = idf(docFreq=934, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.21994664 = weight(abstract_txt:engines in 478) [ClassicSimilarity], result of:
            0.21994664 = score(doc=478,freq=3.0), product of:
              0.30658972 = queryWeight, product of:
                2.15895 = boost
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.026785878 = queryNorm
              0.7173973 = fieldWeight in 478, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.3016257 = idf(docFreq=598, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
          0.18771191 = weight(abstract_txt:search in 478) [ClassicSimilarity], result of:
            0.18771191 = score(doc=478,freq=9.0), product of:
              0.21894276 = queryWeight, product of:
                2.234471 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.026785878 = queryNorm
              0.8573561 = fieldWeight in 478, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.078125 = fieldNorm(doc=478)
        0.32 = coord(8/25)