Search (3 results, page 1 of 1)

  • × author_ss:"Bookstein, A."
  • × year_i:[1990 TO 2000}
  1. Bookstein, A.: Informetric distributions : I. Unified overview (1990) 0.09 
    0.0930887 = product of:
  0.1861774 = sum of:
    0.1861774 = sum of:
      0.099987686 = weight(_text_:i in 6902) [ClassicSimilarity], result of:
        0.099987686 = score(doc=6902,freq=2.0), product of:
          0.17138503 = queryWeight, product of:
            3.7717297 = idf(docFreq=2765, maxDocs=44218)
            0.045439374 = queryNorm
          0.58340967 = fieldWeight in 6902, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.7717297 = idf(docFreq=2765, maxDocs=44218)
            0.109375 = fieldNorm(doc=6902)
      0.08618971 = weight(_text_:22 in 6902) [ClassicSimilarity], result of:
        0.08618971 = score(doc=6902,freq=2.0), product of:
          0.15912095 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.045439374 = queryNorm
          0.5416616 = fieldWeight in 6902, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.109375 = fieldNorm(doc=6902)
  0.5 = coord(1/2)
    Date
    22. 7.2006 18:55:29
  2. Bookstein, A.: Informetric distributions : II. Resilience to ambiguity (1990) 0.02 
    0.021547427 = product of:
  0.043094855 = sum of:
    0.043094855 = product of:
      0.08618971 = sum of:
        0.08618971 = weight(_text_:22 in 4689) [ClassicSimilarity], result of:
          0.08618971 = score(doc=4689,freq=2.0), product of:
            0.15912095 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045439374 = queryNorm
            0.5416616 = fieldWeight in 4689, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=4689)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 18:55:55
  3. Bookstein, A.: Bibliocryptography (1996) 0.02 
    0.017675493 = product of:
  0.035350986 = sum of:
    0.035350986 = product of:
      0.07070197 = sum of:
        0.07070197 = weight(_text_:i in 6502) [ClassicSimilarity], result of:
          0.07070197 = score(doc=6502,freq=4.0), product of:
            0.17138503 = queryWeight, product of:
              3.7717297 = idf(docFreq=2765, maxDocs=44218)
              0.045439374 = queryNorm
            0.41253293 = fieldWeight in 6502, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.7717297 = idf(docFreq=2765, maxDocs=44218)
              0.0546875 = fieldNorm(doc=6502)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Because of concerns about the privacy of its patrons, it is common for libraries to systematically destroy historic information about book circulation. I argue that this information has great potential value for improving retrieval effectiveness, and give 2 examples of how this information can be used. Further, I show how use-data can be preserved and exploited while still giving a high degree of protection for patron privacy. The methods are analyzed and formulae are derived indicating the tradeoff between retrieval effectiveness and security. A second, contrasting application, indicating how to introduce 'fingerprints' into digitized audio-visual material in a tamper-resistant manner, is described