Search (1 results, page 1 of 1)

  • × author_ss:"Schaer, P."
  • × theme_ss:"Semantische Interoperabilität"
  • × year_i:[2010 TO 2020}
  1. Mayr, P.; Schaer, P.; Mutschke, P.: ¬A science model driven retrieval prototype (2011) 0.02
    0.023430167 = product of:
      0.09372067 = sum of:
        0.09372067 = weight(_text_:services in 649) [ClassicSimilarity], result of:
          0.09372067 = score(doc=649,freq=10.0), product of:
            0.17221296 = queryWeight, product of:
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.046906993 = queryNorm
            0.5442138 = fieldWeight in 649, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              3.6713707 = idf(docFreq=3057, maxDocs=44218)
              0.046875 = fieldNorm(doc=649)
      0.25 = coord(1/4)
    
    Abstract
    This paper is about a better understanding of the structure and dynamics of science and the usage of these insights for compensating the typical problems that arises in metadata-driven Digital Libraries. Three science model driven retrieval services are presented: co-word analysis based query expansion, re-ranking via Bradfordizing and author centrality. The services are evaluated with relevance assessments from which two important implications emerge: (1) precision values of the retrieval services are the same or better than the tf-idf retrieval baseline and (2) each service retrieved a disjoint set of documents. The different services each favor quite other - but still relevant - documents than pure term-frequency based rankings. The proposed models and derived retrieval services therefore open up new viewpoints on the scientific knowledge space and provide an alternative framework to structure scholarly information systems.