Search (6 results, page 1 of 1)

0.021947198 = product of:
  0.08778879 = sum of:
    0.08778879 = weight(_text_:data in 5543) [ClassicSimilarity], result of:
      0.08778879 = score(doc=5543,freq=4.0), product of:
        0.14807065 = queryWeight, product of:
          3.1620505 = idf(docFreq=5088, maxDocs=44218)
          0.046827413 = queryNorm
        0.5928845 = fieldWeight in 5543, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.1620505 = idf(docFreq=5088, maxDocs=44218)
          0.09375 = fieldNorm(doc=5543)
  0.25 = coord(1/4)

Abstract

My paper this evening will be chiefly concerned with problems relating to chemical data and to data which relate to subjects on the fringe of chemical science

0.014837332 = product of:
  0.05934933 = sum of:
    0.05934933 = product of:
      0.11869866 = sum of:
        0.11869866 = weight(_text_:processing in 2752) [ClassicSimilarity], result of:
          0.11869866 = score(doc=2752,freq=2.0), product of:
            0.18956426 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.046827413 = queryNorm
            0.6261658 = fieldWeight in 2752, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.109375 = fieldNorm(doc=2752)
      0.5 = coord(1/2)
  0.25 = coord(1/4)

0.010973599 = product of:
  0.043894395 = sum of:
    0.043894395 = weight(_text_:data in 1654) [ClassicSimilarity], result of:
      0.043894395 = score(doc=1654,freq=4.0), product of:
        0.14807065 = queryWeight, product of:
          3.1620505 = idf(docFreq=5088, maxDocs=44218)
          0.046827413 = queryNorm
        0.29644224 = fieldWeight in 1654, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.1620505 = idf(docFreq=5088, maxDocs=44218)
          0.046875 = fieldNorm(doc=1654)
  0.25 = coord(1/4)

Abstract

A classification is a theory of the structure of knowledge. From a discussion of the nature of truth, it is held that scientific knowledge is the only knowledge which can be regarded as true. The method of induction from empirical data is therefore applied to the construction of a classification. Items of knowledge are divided into uniquely definable terms, called isolates, and the relations between them, called operators. It is shown that only four basic operators exist, expressing appurtenance, equivalence, reaction and causation; using symbols for these operators, all subjects can be analysed in a linear form called an analet. With the addition of the permissible permutations of such analets, formed according to simple rules, alphabetical arrangement of the first terms provide a complete, logical subject index. Examples are given, and possible difficulties are considered. A classification can then be constructed by selection of deductive relations, arranged in hierarchical form. The nature of possible classifications is discussed. It is claimed that such an inductively constructed classification is the only true representation of the structure of knowledge, and that these principles provide a simple technique for accurately and fully indexing and classifying any given set of data, with complete flexibility

0.009516701 = product of:
  0.038066804 = sum of:
    0.038066804 = product of:
      0.07613361 = sum of:
        0.07613361 = weight(_text_:22 in 4857) [ClassicSimilarity], result of:
          0.07613361 = score(doc=4857,freq=2.0), product of:
            0.16398162 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046827413 = queryNorm
            0.46428138 = fieldWeight in 4857, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=4857)
      0.5 = coord(1/2)
  0.25 = coord(1/4)

Date

8. 7.2000 18:17:22

0.009516701 = product of:
  0.038066804 = sum of:
    0.038066804 = product of:
      0.07613361 = sum of:
        0.07613361 = weight(_text_:22 in 5256) [ClassicSimilarity], result of:
          0.07613361 = score(doc=5256,freq=2.0), product of:
            0.16398162 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046827413 = queryNorm
            0.46428138 = fieldWeight in 5256, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=5256)
      0.5 = coord(1/2)
  0.25 = coord(1/4)

Date

3.10.2000 10:22:59

0.008478476 = product of:
  0.033913903 = sum of:
    0.033913903 = product of:
      0.067827806 = sum of:
        0.067827806 = weight(_text_:processing in 2278) [ClassicSimilarity], result of:
          0.067827806 = score(doc=2278,freq=2.0), product of:
            0.18956426 = queryWeight, product of:
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.046827413 = queryNorm
            0.35780904 = fieldWeight in 2278, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.048147 = idf(docFreq=2097, maxDocs=44218)
              0.0625 = fieldNorm(doc=2278)
      0.5 = coord(1/2)
  0.25 = coord(1/4)

Imprint

Washington : Library of Congress, Processing Dept.