Search (3 results, page 1 of 1)

  • × theme_ss:"Informetrie"
  • × author_ss:"Bar-Ilan, J."
  1. Bar-Ilan, J.: On the overlap, the precision and estimated recall of search engines : a case study of the query 'Erdös' (1998) 0.00
    0.0047349897 = product of:
      0.009469979 = sum of:
        0.009469979 = product of:
          0.028409937 = sum of:
            0.028409937 = weight(_text_:12 in 3753) [ClassicSimilarity], result of:
              0.028409937 = score(doc=3753,freq=2.0), product of:
                0.13281173 = queryWeight, product of:
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.048018172 = queryNorm
                0.21391137 = fieldWeight in 3753, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3753)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Date
    2. 3.1997 12:16:21
  2. Bar-Ilan, J.; Peritz, B.C.: Informetric theories and methods for exploring the Internet : an analytical survey of recent research literature (2002) 0.00
    0.0040585627 = product of:
      0.008117125 = sum of:
        0.008117125 = product of:
          0.024351375 = sum of:
            0.024351375 = weight(_text_:12 in 813) [ClassicSimilarity], result of:
              0.024351375 = score(doc=813,freq=2.0), product of:
                0.13281173 = queryWeight, product of:
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.048018172 = queryNorm
                0.1833526 = fieldWeight in 813, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.046875 = fieldNorm(doc=813)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Date
    11. 2.2007 12:32:43
  3. Shema, H.; Bar-Ilan, J.; Thelwall, M.: Do blog citations correlate with a higher number of future citations? : Research blogs as a potential source for alternative metrics (2014) 0.00
    0.0040585627 = product of:
      0.008117125 = sum of:
        0.008117125 = product of:
          0.024351375 = sum of:
            0.024351375 = weight(_text_:12 in 1258) [ClassicSimilarity], result of:
              0.024351375 = score(doc=1258,freq=2.0), product of:
                0.13281173 = queryWeight, product of:
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.048018172 = queryNorm
                0.1833526 = fieldWeight in 1258, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  2.765864 = idf(docFreq=7562, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1258)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Abstract
    Journal-based citations are an important source of data for impact indices. However, the impact of journal articles extends beyond formal scholarly discourse. Measuring online scholarly impact calls for new indices, complementary to the older ones. This article examines a possible alternative metric source, blog posts aggregated at ResearchBlogging.org, which discuss peer-reviewed articles and provide full bibliographic references. Articles reviewed in these blogs therefore receive "blog citations." We hypothesized that articles receiving blog citations close to their publication time receive more journal citations later than the articles in the same journal published in the same year that did not receive such blog citations. Statistically significant evidence for articles published in 2009 and 2010 support this hypothesis for seven of 12 journals (58%) in 2009 and 13 of 19 journals (68%) in 2010. We suggest, based on these results, that blog citations can be used as an alternative metric source.