Search (45 results, page 3 of 3)

Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.00

0.0013383033 = product of:
  0.018736245 = sum of:
    0.018736245 = product of:
      0.056208733 = sum of:
        0.056208733 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
          0.056208733 = score(doc=262,freq=2.0), product of:
            0.103770934 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.029633347 = queryNorm
            0.5416616 = fieldWeight in 262, 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=262)
      0.33333334 = coord(1/3)
  0.071428575 = coord(1/14)

Date: 20.10.2000 12:22:23

Feng, S.: ¬A comparative study of indexing languages in single and multidatabase searching (1989) 0.00
```
0.0011531039 = product of:
  0.016143454 = sum of:
    0.016143454 = weight(_text_:information in 2494) [ClassicSimilarity], result of:
      0.016143454 = score(doc=2494,freq=8.0), product of:
        0.052020688 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.029633347 = queryNorm
        0.3103276 = fieldWeight in 2494, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=2494)
  0.071428575 = coord(1/14)
```
Abstract

An experiment was conducted using 3 data bases in library and information science - Library and Information Science Abstracts (LISA), Information Science Abstracts and ERIC - to investigate some of the main factors affecting on-line searching: effectiveness of search vocabularies, combinations of fields searched, and overlaps among databases. Natural language, controlled vocabulary and a mixture of natural language and controlled terms were tested using different fields of bibliographic records. Also discusses a comparative evaluation of single and multi-data base searching, measuring the overlap among data bases and their influence upon on-line searching.

Source

Canadian Journal of Information Science. 14(1989) no.2, S.26-46

Bellardo, T.; Saracevic, T.: Online searching and search output : relationships between overlap, relevance, recall and precision (1987) 0.00

6.115257E-4 = product of:
  0.00856136 = sum of:
    0.00856136 = weight(_text_:information in 4150) [ClassicSimilarity], result of:
      0.00856136 = score(doc=4150,freq=4.0), product of:
        0.052020688 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.029633347 = queryNorm
        0.16457605 = fieldWeight in 4150, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=4150)
  0.071428575 = coord(1/14)

Imprint: Medford, NJ : Learned Information
Source: Proceedings of the 50th Annual Meeting of the American Society for Information Science 1987. Ed.: C. Chen

Prasher, R.G.: Evaluation of indexing system (1989) 0.00
```
5.7655195E-4 = product of:
  0.008071727 = sum of:
    0.008071727 = weight(_text_:information in 4998) [ClassicSimilarity], result of:
      0.008071727 = score(doc=4998,freq=2.0), product of:
        0.052020688 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.029633347 = queryNorm
        0.1551638 = fieldWeight in 4998, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0625 = fieldNorm(doc=4998)
  0.071428575 = coord(1/14)
```
Abstract

Describes information system and its various components-index file construstion, query formulation and searching. Discusses an indexing system, and brings out the need for its evaluation. Explains the concept of the efficiency of indexing systems and discusses factors which control this efficiency. Gives criteria for evaluation. Discusses recall and precision ratios, as also noise ratio, novelty ratio, and exhaustivity and specificity and the impact of each on the efficiency of indexing system. Mention also various steps for evaluation.
Peritz, B.C.: On the informativeness of titles (1984) 0.00
```
5.04483E-4 = product of:
  0.0070627616 = sum of:
    0.0070627616 = weight(_text_:information in 2636) [ClassicSimilarity], result of:
      0.0070627616 = score(doc=2636,freq=2.0), product of:
        0.052020688 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.029633347 = queryNorm
        0.13576832 = fieldWeight in 2636, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2636)
  0.071428575 = coord(1/14)
```
Abstract

The frequency of non-informative titles of journal articles was assessed for two fields: library and information science and sociology. The percentage of non informative titles was 21% in the formaer and 15% in the latter. In both fields, the non-informative titles, were concentratein only a few journals. The non-informative titles in library science were derived mainly from non-research journals. IN sociology the reasons for non-informative titles may be more complex; some of these journals are highly cited. For the improvement of retrievaleffiency the adoption of a policy encouraging informative titles (as in journals of chemistry) is recommended.

Search (45 results, page 3 of 3)

Authors

Languages

Types

Themes