Search (5 results, page 1 of 1)

0.019058352 = product of:
  0.038116705 = sum of:
    0.038116705 = product of:
      0.07623341 = sum of:
        0.07623341 = weight(_text_:systems in 7739) [ClassicSimilarity], result of:
          0.07623341 = score(doc=7739,freq=8.0), product of:
            0.16037072 = queryWeight, product of:
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.052184064 = queryNorm
            0.47535738 = fieldWeight in 7739, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.0546875 = fieldNorm(doc=7739)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

The low effectiveness of most current information systems has often been pointed out and deplored. A number of misconceptions and experiments under unrealistic conditions have contributed to the faulty design and evaluation of information systems. The postulate of representational predictibility can help to clarify some of the still pending issues as there are the strenghts and limitations of uncontrolled natural language text in retrieval systems, factors for their evaluation, the reliability, consistency, and exhaustivity of indexing, the postulated 'inverse precision-recall relationship', and the usefulness of syntactical evices. The performance of information systems can be imporved if representational predictibility is aimed at in their design and operational use

0.013476291 = product of:
  0.026952581 = sum of:
    0.026952581 = product of:
      0.053905163 = sum of:
        0.053905163 = weight(_text_:systems in 4115) [ClassicSimilarity], result of:
          0.053905163 = score(doc=4115,freq=4.0), product of:
            0.16037072 = queryWeight, product of:
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.052184064 = queryNorm
            0.33612844 = fieldWeight in 4115, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4115)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

The comparative evaluation of different mechanized information systems continues to constitute a controversial topic in the literature. Diametrically differemt opinions, seemingly corroborated through empirical evidence, have been presented since the time of the Cranfield experiments. For literally anything an empirical 'proof' can be submitted provided that suitable examples are selected and methods are chosen. substantial advance in Library and Information Science requires abandoning empiricism. Budd's 'hermeneutic phenomenoloy' seems to constitute a promising substitute

0.010890487 = product of:
  0.021780973 = sum of:
    0.021780973 = product of:
      0.043561947 = sum of:
        0.043561947 = weight(_text_:systems in 2222) [ClassicSimilarity], result of:
          0.043561947 = score(doc=2222,freq=2.0), product of:
            0.16037072 = queryWeight, product of:
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.052184064 = queryNorm
            0.2716328 = fieldWeight in 2222, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.0625 = fieldNorm(doc=2222)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Both classification systems and thesauri have their specific strengths and weaknesses. Through properly combining both approaches one can eliminate the latter and largely preserve the strenghts. 'Classauri' which originate in this well-known way are most effective if they are constructed and applied during computer-aided indexing. A special variety of classaurus is described which is characterized by the employment of simple bur highly effective conceptual and technical devices and by the renunciation of attempts to generate the wording of index entries algorithmically

0.009529176 = product of:
  0.019058352 = sum of:
    0.019058352 = product of:
      0.038116705 = sum of:
        0.038116705 = weight(_text_:systems in 8756) [ClassicSimilarity], result of:
          0.038116705 = score(doc=8756,freq=2.0), product of:
            0.16037072 = queryWeight, product of:
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.052184064 = queryNorm
            0.23767869 = fieldWeight in 8756, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.0546875 = fieldNorm(doc=8756)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Content

Enthält folgende Kapitel: Information and information systems; Information system survival power; Theoretical considerations on information storage and retrieval; Indexing (representation of the essence of documents; extractive, assignment, consistent indexing, indexing and abstracting, book indexing, index language vocabulary, syntax, concept analysis, evaluation of indexing quality); Technology of information supply; Glossary of terms used; Systematic and 'basic index'

0.008167865 = product of:
  0.01633573 = sum of:
    0.01633573 = product of:
      0.03267146 = sum of:
        0.03267146 = weight(_text_:systems in 8278) [ClassicSimilarity], result of:
          0.03267146 = score(doc=8278,freq=2.0), product of:
            0.16037072 = queryWeight, product of:
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.052184064 = queryNorm
            0.2037246 = fieldWeight in 8278, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0731742 = idf(docFreq=5561, maxDocs=44218)
              0.046875 = fieldNorm(doc=8278)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

The tight adherence to dogmas, created and advocated by authorities and disseminated through hearsay, constitutes an impediment to the progress badly needed in view of the low effectiveness of the vast majority of our bibliographic information systems. The Italian mathematician and physicist Galileo has become famous not only for his discoveries but also for his being exposed to the rejective and even hostile attitude on the part of his contemporaries when he contradicted several dogmas prevailing at that time. This obstructive attitude can be traced throughout the centuries and manifests itself in the field of modern information science, too. An example is the allegedly necessary, inevitable precision/recall relationship, as most recently postulated again by Lancaster (1994). It is believed to be confirmed by emprical evidence, with other empirical evidence to the contrary being neglected. This case even constitutes an example of the suppression of truth in the interest of upholding a dogma