Search (10 results, page 1 of 1)

0.016527869 = product of:
  0.09916721 = sum of:
    0.09916721 = weight(_text_:web in 82) [ClassicSimilarity], result of:
      0.09916721 = score(doc=82,freq=20.0), product of:
        0.14495286 = queryWeight, product of:
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.044416238 = queryNorm
        0.6841342 = fieldWeight in 82, product of:
          4.472136 = tf(freq=20.0), with freq of:
            20.0 = termFreq=20.0
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.046875 = fieldNorm(doc=82)
  0.16666667 = coord(1/6)

Abstract

References to printed documents made on the web are called web-to-print references. These printed documents then in turn receive web-to-print citations. Webto-print citations and web-to-print references are the topic of this article, in which we study the online impact of printed sources. Web-to-print citations are discussed from a structural point of view and a small-scale experiment related to web-to-print citations for local history journals is performed. The main research question in setting up this experiment concerns the possibility of using web-to-print citations as a substitute for classical citation indexes by gauging the importance, visibility and impact of journals in the humanities. Results show the importance of web bibliographies in the field, but, at least for what concerns the journals and the period studied here, the amount of received web-to-print citations is too small to draw general conclusions.

0.010980619 = product of:
  0.032941855 = sum of:
    0.020906283 = weight(_text_:web in 5171) [ClassicSimilarity], result of:
      0.020906283 = score(doc=5171,freq=2.0), product of:
        0.14495286 = queryWeight, product of:
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.044416238 = queryNorm
        0.14422815 = fieldWeight in 5171, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.03125 = fieldNorm(doc=5171)
    0.012035574 = product of:
      0.024071148 = sum of:
        0.024071148 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
          0.024071148 = score(doc=5171,freq=2.0), product of:
            0.1555381 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.044416238 = queryNorm
            0.15476047 = fieldWeight in 5171, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=5171)
      0.5 = coord(1/2)
  0.33333334 = coord(2/6)

Abstract

Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.

Date

9. 7.2006 10:22:35

0.008738637 = product of:
  0.05243182 = sum of:
    0.05243182 = weight(_text_:computer in 3845) [ClassicSimilarity], result of:
      0.05243182 = score(doc=3845,freq=2.0), product of:
        0.16231956 = queryWeight, product of:
          3.6545093 = idf(docFreq=3109, maxDocs=44218)
          0.044416238 = queryNorm
        0.32301605 = fieldWeight in 3845, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.6545093 = idf(docFreq=3109, maxDocs=44218)
          0.0625 = fieldNorm(doc=3845)
  0.16666667 = coord(1/6)

Source

Human-computer interaction. 10(1995) no.4, S.345-400

0.008245593 = product of:
  0.049473554 = sum of:
    0.049473554 = product of:
      0.09894711 = sum of:
        0.09894711 = weight(_text_:programs in 4384) [ClassicSimilarity], result of:
          0.09894711 = score(doc=4384,freq=2.0), product of:
            0.25748047 = queryWeight, product of:
              5.79699 = idf(docFreq=364, maxDocs=44218)
              0.044416238 = queryNorm
            0.38428974 = fieldWeight in 4384, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.79699 = idf(docFreq=364, maxDocs=44218)
              0.046875 = fieldNorm(doc=4384)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

One aim of science evaluation studies is to determine quantitatively the contribution of different players (authors, departments, countries) to the whole system. This information is then used to study the evolution of the system, for instance to gauge the results of special national or international programs. Taking articles as our basic data, we want to determine the exact relative contribution of each coauthor or each country. These numbers are brought together to obtain country scores, or department scores, etc. It turns out, as we will show in this article, that different scoring methods can yield totally different rankings. Conseqeuntly, a ranking between countries, universities, research groups or authors, based on one particular accrediting methods does not contain an absolute truth about their relative importance

0.007646307 = product of:
  0.04587784 = sum of:
    0.04587784 = weight(_text_:computer in 2717) [ClassicSimilarity], result of:
      0.04587784 = score(doc=2717,freq=2.0), product of:
        0.16231956 = queryWeight, product of:
          3.6545093 = idf(docFreq=3109, maxDocs=44218)
          0.044416238 = queryNorm
        0.28263903 = fieldWeight in 2717, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.6545093 = idf(docFreq=3109, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2717)
  0.16666667 = coord(1/6)

Abstract

Temporal growth of the h-index in a diachronous cumulative time series is predicted to be linear by Hirsch (2005), whereas other models predict a concave increase. Actual data generally yield a linear growth or S-shaped growth. We study the h-index's growth in computer simulations of the publication-citation process. In most simulations the h-index grows linearly in time. Only occasionally does an S-shape occur, while in our simulations a concave increase is very rare. The latter is often signalled by the occurrence of plateaus - periods of h-index stagnation. Several parameters and their influence on the h-index's growth are determined and discussed.

0.006968761 = product of:
  0.041812565 = sum of:
    0.041812565 = weight(_text_:web in 4487) [ClassicSimilarity], result of:
      0.041812565 = score(doc=4487,freq=2.0), product of:
        0.14495286 = queryWeight, product of:
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.044416238 = queryNorm
        0.2884563 = fieldWeight in 4487, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.2635105 = idf(docFreq=4597, maxDocs=44218)
          0.0625 = fieldNorm(doc=4487)
  0.16666667 = coord(1/6)

Abstract

A bibliometric method for analyzing and visualizing national research profiles is adapted to describe national preferences for publishing particular document types. Similarities in national profiles and national peculiarities are discussed based on the publication output of the 26 most active countries indexed in the Web of Science annual volume 2007.

0.006871327 = product of:
  0.04122796 = sum of:
    0.04122796 = product of:
      0.08245592 = sum of:
        0.08245592 = weight(_text_:programs in 4461) [ClassicSimilarity], result of:
          0.08245592 = score(doc=4461,freq=2.0), product of:
            0.25748047 = queryWeight, product of:
              5.79699 = idf(docFreq=364, maxDocs=44218)
              0.044416238 = queryNorm
            0.32024145 = fieldWeight in 4461, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.79699 = idf(docFreq=364, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4461)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Abstract

Software programs are among the most important tools in data-driven research. The popularity of well-known packages and corresponding large numbers of citations received bear testimony of the contribution of scientific software to academic research. Yet software is not generally recognized as an academic outcome. In this study, a usage-based model is proposed with varied indicators including citations, mentions, and downloads to measure the importance of scientific software. We performed an investigation on a sample of international bioinformatics research articles, and on a sample from the Chinese community. Our analysis shows that scientists in the field of bioinformatics rely heavily on scientific software: the major differences between the international community and the Chinese example being how scientific packages are mentioned in publications and the time gap between the introduction of a package and its use. Biologists publishing in international journals tend to apply the latest tools earlier; Chinese scientists publishing in Chinese tend to follow later. Further, journals with higher impact factors tend to publish articles applying the latest tools earlier.

0.005014823 = product of:
  0.030088935 = sum of:
    0.030088935 = product of:
      0.06017787 = sum of:
        0.06017787 = weight(_text_:22 in 4992) [ClassicSimilarity], result of:
          0.06017787 = score(doc=4992,freq=2.0), product of:
            0.1555381 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.044416238 = queryNorm
            0.38690117 = fieldWeight in 4992, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=4992)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Date

14. 2.2012 12:53:22

0.0030088935 = product of:
  0.01805336 = sum of:
    0.01805336 = product of:
      0.03610672 = sum of:
        0.03610672 = weight(_text_:22 in 7659) [ClassicSimilarity], result of:
          0.03610672 = score(doc=7659,freq=2.0), product of:
            0.1555381 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.044416238 = queryNorm
            0.23214069 = fieldWeight in 7659, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=7659)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Source

Journal of information science. 22(1996) no.3, S.165-170

0.0030088935 = product of:
  0.01805336 = sum of:
    0.01805336 = product of:
      0.03610672 = sum of:
        0.03610672 = weight(_text_:22 in 5270) [ClassicSimilarity], result of:
          0.03610672 = score(doc=5270,freq=2.0), product of:
            0.1555381 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.044416238 = queryNorm
            0.23214069 = fieldWeight in 5270, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=5270)
      0.5 = coord(1/2)
  0.16666667 = coord(1/6)

Date

22. 7.2006 15:26:24