Search (4 results, page 1 of 1)

  • × year_i:[2000 TO 2010}
  • × author_ss:"Järvelin, K."
  1. Järvelin, K.: ¬An analysis of two approaches in information retrieval : from frameworks to study designs (2007) 0.02 
    0.023902256 = product of:
  0.047804512 = sum of:
    0.047804512 = product of:
      0.095609024 = sum of:
        0.095609024 = weight(_text_:2007 in 326) [ClassicSimilarity], result of:
          0.095609024 = score(doc=326,freq=5.0), product of:
            0.20205033 = queryWeight, product of:
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.044755515 = queryNorm
            0.47319412 = fieldWeight in 326, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.046875 = fieldNorm(doc=326)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.7, S.971-986
    Year
    2007
  2. Talvensaari, T.; Juhola, M.; Laurikkala, J.; Järvelin, K.: Corpus-based cross-language information retrieval in retrieval of highly relevant documents (2007) 0.02 
    0.019918546 = product of:
  0.039837092 = sum of:
    0.039837092 = product of:
      0.079674184 = sum of:
        0.079674184 = weight(_text_:2007 in 139) [ClassicSimilarity], result of:
          0.079674184 = score(doc=139,freq=5.0), product of:
            0.20205033 = queryWeight, product of:
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.044755515 = queryNorm
            0.39432842 = fieldWeight in 139, product of:
              2.236068 = tf(freq=5.0), with freq of:
                5.0 = termFreq=5.0
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.0390625 = fieldNorm(doc=139)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Journal of the American Society for Information Science and Technology. 58(2007) no.3, S.322-334
    Year
    2007
  3. Järvelin, K.; Persson, O.: ¬The DCI index : discounted cumulated impact-based research evaluation (2008) 0.01 
    0.0125975935 = product of:
  0.025195187 = sum of:
    0.025195187 = product of:
      0.050390374 = sum of:
        0.050390374 = weight(_text_:2007 in 2694) [ClassicSimilarity], result of:
          0.050390374 = score(doc=2694,freq=2.0), product of:
            0.20205033 = queryWeight, product of:
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.044755515 = queryNorm
            0.24939516 = fieldWeight in 2694, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.514535 = idf(docFreq=1315, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2694)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Research evaluation is increasingly popular and important among research funding bodies and science policy makers. Various indicators have been proposed to evaluate the standing of individual scientists, institutions, journals, or countries. A simple and popular one among the indicators is the h-index, the Hirsch index (Hirsch 2005), which is an indicator for lifetime achievement of a scholar. Several other indicators have been proposed to complement or balance the h-index. However, these indicators have no conception of aging. The AR-index (Jin et al. 2007) incorporates aging but divides the received citation counts by the raw age of the publication. Consequently, the decay of a publication is very steep and insensitive to disciplinary differences. In addition, we believe that a publication becomes outdated only when it is no longer cited, not because of its age. Finally, all indicators treat citations as equally material when one might reasonably think that a citation from a heavily cited publication should weigh more than a citation froma non-cited or little-cited publication.We propose a new indicator, the Discounted Cumulated Impact (DCI) index, which devalues old citations in a smooth way. It rewards an author for receiving new citations even if the publication is old. Further, it allows weighting of the citations by the citation weight of the citing publication. DCI can be used to calculate research performance on the basis of the h-core of a scholar or any other publication data.
  4. Näppilä, T.; Järvelin, K.; Niemi, T.: ¬A tool for data cube construction from structurally heterogeneous XML documents (2008) 0.01 
    0.007579693 = product of:
  0.015159386 = sum of:
    0.015159386 = product of:
      0.030318772 = sum of:
        0.030318772 = weight(_text_:22 in 1369) [ClassicSimilarity], result of:
          0.030318772 = score(doc=1369,freq=2.0), product of:
            0.15672618 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.044755515 = queryNorm
            0.19345059 = fieldWeight in 1369, 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=1369)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    9. 2.2008 17:22:42

Authors

Themes