Search (2 results, page 1 of 1)

  • × author_ss:"Ding, Y."
  • × author_ss:"Yan, E."
  • × theme_ss:"Informetrie"
  1. Yan, E.; Ding, Y.: Applying centrality measures to impact analysis : a coauthorship network analysis (2009) 0.01
    0.009052756 = product of:
      0.036211025 = sum of:
        0.036211025 = weight(_text_:data in 3083) [ClassicSimilarity], result of:
          0.036211025 = score(doc=3083,freq=2.0), product of:
            0.14807065 = queryWeight, product of:
              3.1620505 = idf(docFreq=5088, maxDocs=44218)
              0.046827413 = queryNorm
            0.24455236 = fieldWeight in 3083, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1620505 = idf(docFreq=5088, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3083)
      0.25 = coord(1/4)
    
    Abstract
    Many studies on coauthorship networks focus on network topology and network statistical mechanics. This article takes a different approach by studying micro-level network properties with the aim of applying centrality measures to impact analysis. Using coauthorship data from 16 journals in the field of library and information science (LIS) with a time span of 20 years (1988-2007), we construct an evolving coauthorship network and calculate four centrality measures (closeness centrality, betweenness centrality, degree centrality, and PageRank) for authors in this network. We find that the four centrality measures are significantly correlated with citation counts. We also discuss the usability of centrality measures in author ranking and suggest that centrality measures can be useful indicators for impact analysis.
  2. Yan, E.; Ding, Y.: Discovering author impact : a PageRank perspective (2011) 0.01
    0.008478476 = product of:
      0.033913903 = sum of:
        0.033913903 = product of:
          0.067827806 = sum of:
            0.067827806 = weight(_text_:processing in 2704) [ClassicSimilarity], result of:
              0.067827806 = score(doc=2704,freq=2.0), product of:
                0.18956426 = queryWeight, product of:
                  4.048147 = idf(docFreq=2097, maxDocs=44218)
                  0.046827413 = queryNorm
                0.35780904 = fieldWeight in 2704, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.048147 = idf(docFreq=2097, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2704)
          0.5 = coord(1/2)
      0.25 = coord(1/4)
    
    Source
    Information processing and management. 47(2011) no.1, S.125-134