Search (7 results, page 1 of 1)

  • × author_ss:"Thelwall, M."
  • × language_ss:"e"
  • × theme_ss:"Informetrie"
  • × year_i:[2000 TO 2010}
  1. Levitt, J.M.; Thelwall, M.: Citation levels and collaboration within library and information science (2009) 0.01
    0.013307041 = product of:
      0.07651548 = sum of:
        0.012935456 = product of:
          0.025870912 = sum of:
            0.025870912 = weight(_text_:bibliothekswesen in 2734) [ClassicSimilarity], result of:
              0.025870912 = score(doc=2734,freq=2.0), product of:
                0.10505787 = queryWeight, product of:
                  4.457672 = idf(docFreq=1392, maxDocs=44218)
                  0.023567878 = queryNorm
                0.24625391 = fieldWeight in 2734, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.457672 = idf(docFreq=1392, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2734)
          0.5 = coord(1/2)
        0.026419718 = weight(_text_:informationswissenschaft in 2734) [ClassicSimilarity], result of:
          0.026419718 = score(doc=2734,freq=2.0), product of:
            0.10616633 = queryWeight, product of:
              4.504705 = idf(docFreq=1328, maxDocs=44218)
              0.023567878 = queryNorm
            0.24885213 = fieldWeight in 2734, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.504705 = idf(docFreq=1328, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2734)
        0.025870912 = weight(_text_:bibliothekswesen in 2734) [ClassicSimilarity], result of:
          0.025870912 = score(doc=2734,freq=2.0), product of:
            0.10505787 = queryWeight, product of:
              4.457672 = idf(docFreq=1392, maxDocs=44218)
              0.023567878 = queryNorm
            0.24625391 = fieldWeight in 2734, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.457672 = idf(docFreq=1392, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2734)
        0.011289392 = product of:
          0.022578783 = sum of:
            0.022578783 = weight(_text_:22 in 2734) [ClassicSimilarity], result of:
              0.022578783 = score(doc=2734,freq=4.0), product of:
                0.08253069 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.023567878 = queryNorm
                0.27358043 = fieldWeight in 2734, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2734)
          0.5 = coord(1/2)
      0.17391305 = coord(4/23)
    
    Abstract
    Collaboration is a major research policy objective, but does it deliver higher quality research? This study uses citation analysis to examine the Web of Science (WoS) Information Science & Library Science subject category (IS&LS) to ascertain whether, in general, more highly cited articles are more highly collaborative than other articles. It consists of two investigations. The first investigation is a longitudinal comparison of the degree and proportion of collaboration in five strata of citation; it found that collaboration in the highest four citation strata (all in the most highly cited 22%) increased in unison over time, whereas collaboration in the lowest citation strata (un-cited articles) remained low and stable. Given that over 40% of the articles were un-cited, it seems important to take into account the differences found between un-cited articles and relatively highly cited articles when investigating collaboration in IS&LS. The second investigation compares collaboration for 35 influential information scientists; it found that their more highly cited articles on average were not more highly collaborative than their less highly cited articles. In summary, although collaborative research is conducive to high citation in general, collaboration has apparently not tended to be essential to the success of current and former elite information scientists.
    Date
    22. 3.2009 12:43:51
    Field
    Bibliothekswesen
    Informationswissenschaft
  2. Thelwall, M.; Li, X.; Barjak, F.; Robinson, S.: Assessing the international web connectivity of research groups (2008) 0.00
    0.001432649 = product of:
      0.016475463 = sum of:
        0.0039282576 = product of:
          0.007856515 = sum of:
            0.007856515 = weight(_text_:1 in 1401) [ClassicSimilarity], result of:
              0.007856515 = score(doc=1401,freq=2.0), product of:
                0.057894554 = queryWeight, product of:
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.023567878 = queryNorm
                0.13570388 = fieldWeight in 1401, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=1401)
          0.5 = coord(1/2)
        0.012547206 = product of:
          0.025094412 = sum of:
            0.025094412 = weight(_text_:international in 1401) [ClassicSimilarity], result of:
              0.025094412 = score(doc=1401,freq=6.0), product of:
                0.078619614 = queryWeight, product of:
                  3.33588 = idf(docFreq=4276, maxDocs=44218)
                  0.023567878 = queryNorm
                0.31918767 = fieldWeight in 1401, product of:
                  2.4494898 = tf(freq=6.0), with freq of:
                    6.0 = termFreq=6.0
                  3.33588 = idf(docFreq=4276, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=1401)
          0.5 = coord(1/2)
      0.08695652 = coord(2/23)
    
    Abstract
    Purpose - The purpose of this paper is to claim that it is useful to assess the web connectivity of research groups, describe hyperlink-based techniques to achieve this and present brief details of European life sciences research groups as a case study. Design/methodology/approach - A commercial search engine was harnessed to deliver hyperlink data via its automatic query submission interface. A special purpose link analysis tool, LexiURL, then summarised and graphed the link data in appropriate ways. Findings - Webometrics can provide a wide range of descriptive information about the international connectivity of research groups. Research limitations/implications - Only one field was analysed, data was taken from only one search engine, and the results were not validated. Practical implications - Web connectivity seems to be particularly important for attracting overseas job applicants and to promote research achievements and capabilities, and hence we contend that it can be useful for national and international governments to use webometrics to ensure that the web is being used effectively by research groups. Originality/value - This is the first paper to make a case for the value of using a range of webometric techniques to evaluate the web presences of research groups within a field, and possibly the first "applied" webometrics study produced for an external contract.
    Source
    Aslib proceedings. 60(2008) no.1, S.18-31
  3. Vaughan, L.; Thelwall, M.: Scholarly use of the Web : what are the key inducers of links to journal Web sites? (2003) 0.00
    0.0010420457 = product of:
      0.02396705 = sum of:
        0.02396705 = sum of:
          0.007856515 = weight(_text_:1 in 1236) [ClassicSimilarity], result of:
            0.007856515 = score(doc=1236,freq=2.0), product of:
              0.057894554 = queryWeight, product of:
                2.4565027 = idf(docFreq=10304, maxDocs=44218)
                0.023567878 = queryNorm
              0.13570388 = fieldWeight in 1236, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4565027 = idf(docFreq=10304, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1236)
          0.016110536 = weight(_text_:29 in 1236) [ClassicSimilarity], result of:
            0.016110536 = score(doc=1236,freq=2.0), product of:
              0.08290443 = queryWeight, product of:
                3.5176873 = idf(docFreq=3565, maxDocs=44218)
                0.023567878 = queryNorm
              0.19432661 = fieldWeight in 1236, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5176873 = idf(docFreq=3565, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1236)
      0.04347826 = coord(1/23)
    
    Source
    Journal of the American Society for Information Science and technology. 54(2003) no.1, S.29-38
  4. Kousha, K.; Thelwall, M.: How is science cited on the Web? : a classification of google unique Web citations (2007) 0.00
    3.470785E-4 = product of:
      0.007982805 = sum of:
        0.007982805 = product of:
          0.01596561 = sum of:
            0.01596561 = weight(_text_:22 in 586) [ClassicSimilarity], result of:
              0.01596561 = score(doc=586,freq=2.0), product of:
                0.08253069 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.023567878 = queryNorm
                0.19345059 = fieldWeight in 586, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=586)
          0.5 = coord(1/2)
      0.04347826 = coord(1/23)
    
    Abstract
    Although the analysis of citations in the scholarly literature is now an established and relatively well understood part of information science, not enough is known about citations that can be found on the Web. In particular, are there new Web types, and if so, are these trivial or potentially useful for studying or evaluating research communication? We sought evidence based upon a sample of 1,577 Web citations of the URLs or titles of research articles in 64 open-access journals from biology, physics, chemistry, and computing. Only 25% represented intellectual impact, from references of Web documents (23%) and other informal scholarly sources (2%). Many of the Web/URL citations were created for general or subject-specific navigation (45%) or for self-publicity (22%). Additional analyses revealed significant disciplinary differences in the types of Google unique Web/URL citations as well as some characteristics of scientific open-access publishing on the Web. We conclude that the Web provides access to a new and different type of citation information, one that may therefore enable us to measure different aspects of research, and the research process in particular; but to obtain good information, the different types should be separated.
  5. Thelwall, M.: Quantitative comparisons of search engine results (2008) 0.00
    3.149623E-4 = product of:
      0.0072441325 = sum of:
        0.0072441325 = product of:
          0.014488265 = sum of:
            0.014488265 = weight(_text_:international in 2350) [ClassicSimilarity], result of:
              0.014488265 = score(doc=2350,freq=2.0), product of:
                0.078619614 = queryWeight, product of:
                  3.33588 = idf(docFreq=4276, maxDocs=44218)
                  0.023567878 = queryNorm
                0.18428308 = fieldWeight in 2350, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.33588 = idf(docFreq=4276, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2350)
          0.5 = coord(1/2)
      0.04347826 = coord(1/23)
    
    Abstract
    Search engines are normally used to find information or Web sites, but Webometric investigations use them for quantitative data such as the number of pages matching a query and the international spread of those pages. For this type of application, the accuracy of the hit count estimates and range of URLs in the full results are important. Here, we compare the applications programming interfaces of Google, Yahoo!, and Live Search for 1,587 single word searches. The hit count estimates were broadly consistent but with Yahoo! and Google, reporting 5-6 times more hits than Live Search. Yahoo! tended to return slightly more matching URLs than Google, with Live Search returning significantly fewer. Yahoo!'s result URLs included a significantly wider range of domains and sites than the other two, and there was little consistency between the three engines in the number of different domains. In contrast, the three engines were reasonably consistent in the number of different top-level domains represented in the result URLs, although Yahoo! tended to return the most. In conclusion, quantitative results from the three search engines are mostly consistent but with unexpected types of inconsistency that users should be aware of. Google is recommended for hit count estimates but Yahoo! is recommended for all other Webometric purposes.
  6. Thelwall, M.: ¬A comparison of sources of links for academic Web impact factor calculations (2002) 0.00
    2.0495258E-4 = product of:
      0.0047139092 = sum of:
        0.0047139092 = product of:
          0.0094278185 = sum of:
            0.0094278185 = weight(_text_:1 in 4474) [ClassicSimilarity], result of:
              0.0094278185 = score(doc=4474,freq=2.0), product of:
                0.057894554 = queryWeight, product of:
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.023567878 = queryNorm
                0.16284466 = fieldWeight in 4474, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4474)
          0.5 = coord(1/2)
      0.04347826 = coord(1/23)
    
    Source
    Journal of documentation. 58(2002) no.1, S.66-78
  7. Thelwall, M.: Interpreting social science link analysis research : a theoretical framework (2006) 0.00
    2.0495258E-4 = product of:
      0.0047139092 = sum of:
        0.0047139092 = product of:
          0.0094278185 = sum of:
            0.0094278185 = weight(_text_:1 in 4908) [ClassicSimilarity], result of:
              0.0094278185 = score(doc=4908,freq=2.0), product of:
                0.057894554 = queryWeight, product of:
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.023567878 = queryNorm
                0.16284466 = fieldWeight in 4908, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.4565027 = idf(docFreq=10304, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4908)
          0.5 = coord(1/2)
      0.04347826 = coord(1/23)
    
    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.1, S.60-68