Search (4 results, page 1 of 1)

  • × author_ss:"Järvelin, K."
  1. Vakkari, P.; Järvelin, K.; Chang, Y.-W.: ¬The association of disciplinary background with the evolution of topics and methods in Library and Information Science research 1995-2015 (2023) 0.03
    0.02942955 = product of:
      0.07357387 = sum of:
        0.032301076 = weight(_text_:21 in 998) [ClassicSimilarity], result of:
          0.032301076 = score(doc=998,freq=2.0), product of:
            0.1887428 = queryWeight, product of:
              3.0979297 = idf(docFreq=5425, maxDocs=44218)
              0.060925465 = queryNorm
            0.17113805 = fieldWeight in 998, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.0979297 = idf(docFreq=5425, maxDocs=44218)
              0.0390625 = fieldNorm(doc=998)
        0.041272797 = weight(_text_:22 in 998) [ClassicSimilarity], result of:
          0.041272797 = score(doc=998,freq=2.0), product of:
            0.2133506 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.060925465 = queryNorm
            0.19345059 = fieldWeight in 998, 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=998)
      0.4 = coord(2/5)
    
    Abstract
    The paper reports a longitudinal analysis of the topical and methodological development of Library and Information Science (LIS). Its focus is on the effects of researchers' disciplines on these developments. The study extends an earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) by a coordinated dataset representing a content analysis of articles published in 31 scholarly LIS journals in 1995, 2005, and 2015. It is novel in its coverage of authors' disciplines, topical and methodological aspects in a coordinated dataset spanning two decades thus allowing trend analysis. The findings include a shrinking trend in the share of LIS from 67 to 36% while Computer Science, and Business and Economics increase their share from 9 and 6% to 21 and 16%, respectively. The earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) for the year 2015 identified three topical clusters of LIS research, focusing on topical subfields, methodologies, and contributing disciplines. Correspondence analysis confirms their existence already in 1995 and traces their development through the decades. The contributing disciplines infuse their concepts, research questions, and approaches to LIS and may also subsume vital parts of LIS in their own structures of knowledge production.
    Date
    22. 6.2023 18:15:06
  2. Järvelin, K.; Kristensen, J.; Niemi, T.; Sormunen, E.; Keskustalo, H.: ¬A deductive data model for query expansion (1996) 0.01
    0.0099054715 = product of:
      0.049527355 = sum of:
        0.049527355 = weight(_text_:22 in 2230) [ClassicSimilarity], result of:
          0.049527355 = score(doc=2230,freq=2.0), product of:
            0.2133506 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.060925465 = queryNorm
            0.23214069 = fieldWeight in 2230, 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=2230)
      0.2 = coord(1/5)
    
    Source
    Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (ACM SIGIR '96), Zürich, Switzerland, August 18-22, 1996. Eds.: H.P. Frei et al
  3. Saastamoinen, M.; Järvelin, K.: Search task features in work tasks of varying types and complexity (2017) 0.01
    0.0099054715 = product of:
      0.049527355 = sum of:
        0.049527355 = weight(_text_:22 in 3589) [ClassicSimilarity], result of:
          0.049527355 = score(doc=3589,freq=2.0), product of:
            0.2133506 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.060925465 = queryNorm
            0.23214069 = fieldWeight in 3589, 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=3589)
      0.2 = coord(1/5)
    
    Abstract
    Information searching in practice seldom is an end in itself. In work, work task (WT) performance forms the context, which information searching should serve. Therefore, information retrieval (IR) systems development/evaluation should take the WT context into account. The present paper analyzes how WT features: task complexity and task types, affect information searching in authentic work: the types of information needs, search processes, and search media. We collected data on 22 information professionals in authentic work situations in three organization types: city administration, universities, and companies. The data comprise 286 WTs and 420 search tasks (STs). The data include transaction logs, video recordings, daily questionnaires, interviews. and observation. The data were analyzed quantitatively. Even if the participants used a range of search media, most STs were simple throughout the data, and up to 42% of WTs did not include searching. WT's effects on STs are not straightforward: different WT types react differently to WT complexity. Due to the simplicity of authentic searching, the WT/ST types in interactive IR experiments should be reconsidered.
  4. Näppilä, T.; Järvelin, K.; Niemi, T.: ¬A tool for data cube construction from structurally heterogeneous XML documents (2008) 0.01
    0.00825456 = product of:
      0.041272797 = sum of:
        0.041272797 = weight(_text_:22 in 1369) [ClassicSimilarity], result of:
          0.041272797 = score(doc=1369,freq=2.0), product of:
            0.2133506 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.060925465 = 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)
      0.2 = coord(1/5)
    
    Date
    9. 2.2008 17:22:42