Search (280 results, page 1 of 14)

  • × language_ss:"e"
  • × theme_ss:"Suchmaschinen"
  • × year_i:[2000 TO 2010}
  1. MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000) 0.05 
    0.05088917 = product of:
  0.10177834 = sum of:
    0.10177834 = sum of:
      0.01353075 = weight(_text_:a in 4872) [ClassicSimilarity], result of:
        0.01353075 = score(doc=4872,freq=8.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.25478977 = fieldWeight in 4872, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.078125 = fieldNorm(doc=4872)
      0.0882476 = weight(_text_:22 in 4872) [ClassicSimilarity], result of:
        0.0882476 = score(doc=4872,freq=4.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.54716086 = fieldWeight in 4872, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.078125 = fieldNorm(doc=4872)
  0.5 = coord(1/2)
    Abstract
    Describes the development of EEVL and outlines the services offered. The potential market for EEVL is discussed, and a case study of promotional activities is presented
    Date
    22. 6.2002 19:40:22
    Type
    a
  2. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.05 
    0.048416097 = product of:
  0.09683219 = sum of:
    0.09683219 = sum of:
      0.009471525 = weight(_text_:a in 3445) [ClassicSimilarity], result of:
        0.009471525 = score(doc=3445,freq=2.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.17835285 = fieldWeight in 3445, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.109375 = fieldNorm(doc=3445)
      0.087360665 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
        0.087360665 = score(doc=3445,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.5416616 = fieldWeight in 3445, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.109375 = fieldNorm(doc=3445)
  0.5 = coord(1/2)
    Date
    25. 8.2005 17:42:22
    Type
    a
  3. Bawden, D.: Google and the universe of knowledge (2008) 0.05 
    0.048416097 = product of:
  0.09683219 = sum of:
    0.09683219 = sum of:
      0.009471525 = weight(_text_:a in 844) [ClassicSimilarity], result of:
        0.009471525 = score(doc=844,freq=2.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.17835285 = fieldWeight in 844, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.109375 = fieldNorm(doc=844)
      0.087360665 = weight(_text_:22 in 844) [ClassicSimilarity], result of:
        0.087360665 = score(doc=844,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.5416616 = fieldWeight in 844, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.109375 = fieldNorm(doc=844)
  0.5 = coord(1/2)
    Date
    7. 6.2008 16:22:20
    Type
    a
  4. Price, A.: Five new Danish subject gateways under development (2000) 0.04 
    0.035984084 = product of:
  0.07196817 = sum of:
    0.07196817 = sum of:
      0.009567685 = weight(_text_:a in 4878) [ClassicSimilarity], result of:
        0.009567685 = score(doc=4878,freq=4.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.18016359 = fieldWeight in 4878, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.078125 = fieldNorm(doc=4878)
      0.06240048 = weight(_text_:22 in 4878) [ClassicSimilarity], result of:
        0.06240048 = score(doc=4878,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.38690117 = fieldWeight in 4878, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.078125 = fieldNorm(doc=4878)
  0.5 = coord(1/2)
    Date
    22. 6.2002 19:41:31
    Type
    a
  5. Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000) 0.03 
    0.031011326 = product of:
  0.062022652 = sum of:
    0.062022652 = sum of:
      0.012102271 = weight(_text_:a in 4869) [ClassicSimilarity], result of:
        0.012102271 = score(doc=4869,freq=10.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.22789092 = fieldWeight in 4869, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=4869)
      0.04992038 = weight(_text_:22 in 4869) [ClassicSimilarity], result of:
        0.04992038 = score(doc=4869,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.30952093 = fieldWeight in 4869, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0625 = fieldNorm(doc=4869)
  0.5 = coord(1/2)
    Abstract
    This article gives an overview of the design and organisation of DutchESS, a Dutch information subject gateway created as a national collaborative effort of the National Library and a number of academic libraries. The combined centralised and distributed model of DutchESS is discussed, as well as its selection policy, its metadata format, classification scheme and retrieval options. Also some options for future collaboration on an international level are explored
    Date
    22. 6.2002 19:39:23
    Type
    a
  6. Dempsey, L.: ¬The subject gateway : experiences and issues based on the emergence of the Resource Discovery Network (2000) 0.03 
    0.02964738 = product of:
  0.05929476 = sum of:
    0.05929476 = sum of:
      0.009374379 = weight(_text_:a in 628) [ClassicSimilarity], result of:
        0.009374379 = score(doc=628,freq=6.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.17652355 = fieldWeight in 628, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=628)
      0.04992038 = weight(_text_:22 in 628) [ClassicSimilarity], result of:
        0.04992038 = score(doc=628,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.30952093 = fieldWeight in 628, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0625 = fieldNorm(doc=628)
  0.5 = coord(1/2)
    Abstract
    Charts the history and development of the UK's Resource Discovery Network, which brings together under a common business, technical and service framework a range of subject gateways and other services for the academic and research community. Considers its future relationship to other services, and position within the information ecology
    Date
    22. 6.2002 19:36:13
    Type
    a
  7. Campbell, D.: Australian subject gateways : political and strategic issues (2000) 0.03 
    0.028787265 = product of:
  0.05757453 = sum of:
    0.05757453 = sum of:
      0.007654148 = weight(_text_:a in 4875) [ClassicSimilarity], result of:
        0.007654148 = score(doc=4875,freq=4.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.14413087 = fieldWeight in 4875, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=4875)
      0.04992038 = weight(_text_:22 in 4875) [ClassicSimilarity], result of:
        0.04992038 = score(doc=4875,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.30952093 = fieldWeight in 4875, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0625 = fieldNorm(doc=4875)
  0.5 = coord(1/2)
    Abstract
    The key political and strategic issues which needs to be addressed for the future development of the Australian subject gateways are: continued quality of content creation, integration of access to print and electronic resources, archiving and persistent identification, sustainability of services and service integration. These issues will be more effectively tackled internationally, and the Australian subject gateways are keen to work with international collaborators to achieve a mutually beneficial outcome
    Date
    22. 6.2002 19:41:16
    Type
    a
  8. Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000) 0.03 
    0.02810499 = product of:
  0.05620998 = sum of:
    0.05620998 = sum of:
      0.012529651 = weight(_text_:a in 631) [ClassicSimilarity], result of:
        0.012529651 = score(doc=631,freq=14.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.23593865 = fieldWeight in 631, product of:
            3.7416575 = tf(freq=14.0), with freq of:
              14.0 = termFreq=14.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0546875 = fieldNorm(doc=631)
      0.043680333 = weight(_text_:22 in 631) [ClassicSimilarity], result of:
        0.043680333 = score(doc=631,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.2708308 = fieldWeight in 631, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=631)
  0.5 = coord(1/2)
    Abstract
    'Quality-controlled subject gateways' are Internet services which apply a rich set of quality measures to support systematic resource discovery. Considerable manual effort is used to secure a selection of resources which meet quality criteria and to display a rich description of these resources with standards-based metadata. Regular checking and updating ensure good collection management. A main goal is to provide a high quality of subject access through indexing resources using controlled vocabularies and by offering a deep classification structure for advanced searching and browsing. This article provides an initial empirical overview of existing services of this kind, their approaches and technologies, based on proposed working definitions and typologies of subject gateways
    Date
    22. 6.2002 19:37:55
    Type
    a
  9. Gardner, T.; Iannella, R.: Architecture and software solutions (2000) 0.03 
    0.02766634 = product of:
  0.05533268 = sum of:
    0.05533268 = sum of:
      0.0054123 = weight(_text_:a in 4867) [ClassicSimilarity], result of:
        0.0054123 = score(doc=4867,freq=2.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.10191591 = fieldWeight in 4867, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=4867)
      0.04992038 = weight(_text_:22 in 4867) [ClassicSimilarity], result of:
        0.04992038 = score(doc=4867,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.30952093 = fieldWeight in 4867, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0625 = fieldNorm(doc=4867)
  0.5 = coord(1/2)
    Date
    22. 6.2002 19:38:24
    Type
    a
  10. Sandler, M.: Disruptive beneficence : the Google Print program and the future of libraries (2005) 0.03 
    0.02766634 = product of:
  0.05533268 = sum of:
    0.05533268 = sum of:
      0.0054123 = weight(_text_:a in 208) [ClassicSimilarity], result of:
        0.0054123 = score(doc=208,freq=2.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.10191591 = fieldWeight in 208, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0625 = fieldNorm(doc=208)
      0.04992038 = weight(_text_:22 in 208) [ClassicSimilarity], result of:
        0.04992038 = score(doc=208,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.30952093 = fieldWeight in 208, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0625 = fieldNorm(doc=208)
  0.5 = coord(1/2)
    Pages
    S.5-22
    Type
    a
  11. Price, A.: NOVAGate : a Nordic gateway to electronic resources in the forestry, veterinary and agricultural sciences (2000) 0.03 
    0.027640268 = product of:
  0.055280536 = sum of:
    0.055280536 = sum of:
      0.011600202 = weight(_text_:a in 4874) [ClassicSimilarity], result of:
        0.011600202 = score(doc=4874,freq=12.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.21843673 = fieldWeight in 4874, product of:
            3.4641016 = tf(freq=12.0), with freq of:
              12.0 = termFreq=12.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0546875 = fieldNorm(doc=4874)
      0.043680333 = weight(_text_:22 in 4874) [ClassicSimilarity], result of:
        0.043680333 = score(doc=4874,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.2708308 = fieldWeight in 4874, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=4874)
  0.5 = coord(1/2)
    Abstract
    NOVAGate is a subject-based information gateway covering electronic resources in the agricultural, veterinary and related fields. The service, which opened in July 1998, is produced by the veterinary and agricultural libraries of the 5 Nordic countries - Denmark, Finland, Iceland, Norway and Sweden - which serve the NOVA University. The gateway covers Nordic and European resources as well as the resources of international organizations, but being planned is a network of subject gateways which will give access to a wide range of international quality resources within the agricultural, veterinary and related fields. The service uses the ROADS software
    Date
    22. 6.2002 19:41:00
    Type
    a
  12. Williamson, N.J.: Knowledge structures and the Internet : progress and prospects (2006) 0.03 
    0.027640268 = product of:
  0.055280536 = sum of:
    0.055280536 = sum of:
      0.011600202 = weight(_text_:a in 238) [ClassicSimilarity], result of:
        0.011600202 = score(doc=238,freq=12.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.21843673 = fieldWeight in 238, product of:
            3.4641016 = tf(freq=12.0), with freq of:
              12.0 = termFreq=12.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0546875 = fieldNorm(doc=238)
      0.043680333 = weight(_text_:22 in 238) [ClassicSimilarity], result of:
        0.043680333 = score(doc=238,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.2708308 = fieldWeight in 238, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=238)
  0.5 = coord(1/2)
    Abstract
    This paper analyses the development of the knowledge structures provided as aids to users in searching the Internet. Specific focus is given to web directories, thesauri and gateways and portals. The paper assumes that users need to be able to access information in two ways - to locate information on a subject directly in response to a search term and to be able to browse so as to familiarize themselves with a domain or to refine a request. Emphasis is to the browsing aspect. Background and development are addressed. Structures are analyzed, problems are identified, and future directions discussed.
    Date
    27.12.2008 15:56:22
    Source
    Knowledge organization for a global learning society: Proceedings of the 9th International ISKO Conference, 4-7 July 2006, Vienna, Austria. Hrsg.: G. Budin, C. Swertz u. K. Mitgutsch
    Type
    a
  13. Heery, R.: Information gateways : collaboration and content (2000) 0.03 
    0.025188856 = product of:
  0.05037771 = sum of:
    0.05037771 = sum of:
      0.00669738 = weight(_text_:a in 4866) [ClassicSimilarity], result of:
        0.00669738 = score(doc=4866,freq=4.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.12611452 = fieldWeight in 4866, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0546875 = fieldNorm(doc=4866)
      0.043680333 = weight(_text_:22 in 4866) [ClassicSimilarity], result of:
        0.043680333 = score(doc=4866,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.2708308 = fieldWeight in 4866, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=4866)
  0.5 = coord(1/2)
    Abstract
    Information subject gateways provide targeted discovery services for their users, giving access to Web resources selected according to quality and subject coverage criteria. Information gateways recognise that they must collaborate on a wide range of issues relating to content to ensure continued success. This report is informed by discussion of content activities at the 1999 Imesh Workshop. The author considers the implications for subject based gateways of co-operation regarding coverage policy, creation of metadata, and provision of searching and browsing across services. Other possibilities for co-operation include working more closely with information providers, and diclosure of information in joint metadata registries
    Date
    22. 6.2002 19:38:54
    Type
    a
  14. Rose, D.E.: Reconciling information-seeking behavior with search user interfaces for the Web (2006) 0.02 
    0.024208048 = product of:
  0.048416097 = sum of:
    0.048416097 = sum of:
      0.0047357627 = weight(_text_:a in 5296) [ClassicSimilarity], result of:
        0.0047357627 = score(doc=5296,freq=2.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.089176424 = fieldWeight in 5296, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5296)
      0.043680333 = weight(_text_:22 in 5296) [ClassicSimilarity], result of:
        0.043680333 = score(doc=5296,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.2708308 = fieldWeight in 5296, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5296)
  0.5 = coord(1/2)
    Date
    22. 7.2006 17:58:06
    Type
    a
  15. Nicholson, S.; Sierra, T.; Eseryel, U.Y.; Park, J.-H.; Barkow, P.; Pozo, E.J.; Ward, J.: How much of it is real? : analysis of paid placement in Web search engine results (2006) 0.02 
    0.023258494 = product of:
  0.04651699 = sum of:
    0.04651699 = sum of:
      0.009076704 = weight(_text_:a in 5278) [ClassicSimilarity], result of:
        0.009076704 = score(doc=5278,freq=10.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.1709182 = fieldWeight in 5278, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=5278)
      0.037440285 = weight(_text_:22 in 5278) [ClassicSimilarity], result of:
        0.037440285 = score(doc=5278,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.23214069 = fieldWeight in 5278, 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=5278)
  0.5 = coord(1/2)
    Abstract
    Most Web search tools integrate sponsored results with results from their internal editorial database in providing results to users. The goal of this research is to get a better idea of how much of the screen real estate displays real editorial results as compared to sponsored results. The overall average results are that 40% of all results presented on the first screen are real results, and when the entire first Web page is considered, 67% of the results are nonsponsored results. For general search tools such as Google, 56% of the first screen and 82% of the first Web page contain nonsponsored results. Other results include that query structure makes a significant difference in the percentage of nonsponsored results returned by a search. Similarly, the topic of the query also can have a significant effect on the percentage of sponsored results displayed by most Web search tools.
    Date
    22. 7.2006 16:32:57
    Type
    a
  16. Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003) 0.02 
    0.022779368 = product of:
  0.045558736 = sum of:
    0.045558736 = sum of:
      0.008118451 = weight(_text_:a in 2717) [ClassicSimilarity], result of:
        0.008118451 = score(doc=2717,freq=8.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.15287387 = fieldWeight in 2717, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=2717)
      0.037440285 = weight(_text_:22 in 2717) [ClassicSimilarity], result of:
        0.037440285 = score(doc=2717,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.23214069 = fieldWeight in 2717, 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=2717)
  0.5 = coord(1/2)
    Abstract
    Previous work an search-engine design has indicated that information-seekers may benefit from being given the opportunity to exploit multiple sources of evidence of document relatedness. Few existing systems, however, give users more than minimal control over the selections that may be made among methods of exploitation. By applying the methods of "document network analysis" (DNA), a unifying, graph-theoretic model of content-, collaboration-, and context-based systems (CCC) may be developed in which the nature of the similarities between types of document relatedness and document ranking are clarified. The usefulness of the approach to system design suggested by this model may be tested by constructing and evaluating a prototype system (UCXtra) that allows searchers to maintain control over the multiple ways in which document collections may be ranked and re-ranked.
    Date
    11. 9.2004 17:32:22
    Type
    a
  17. Bilal, D.: Children's use of the Yahooligans! Web search engine : III. Cognitive and physical behaviors on fully self-generated search tasks (2002) 0.02 
    0.022235535 = product of:
  0.04447107 = sum of:
    0.04447107 = sum of:
      0.007030784 = weight(_text_:a in 5228) [ClassicSimilarity], result of:
        0.007030784 = score(doc=5228,freq=6.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.13239266 = fieldWeight in 5228, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=5228)
      0.037440285 = weight(_text_:22 in 5228) [ClassicSimilarity], result of:
        0.037440285 = score(doc=5228,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.23214069 = fieldWeight in 5228, 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=5228)
  0.5 = coord(1/2)
    Abstract
    Bilal, in this third part of her Yahooligans! study looks at children's performance with self-generated search tasks, as compared to previously assigned search tasks looking for differences in success, cognitive behavior, physical behavior, and task preference. Lotus ScreenCam was used to record interactions and post search interviews to record impressions. The subjects, the same 22 seventh grade children in the previous studies, generated topics of interest that were mediated with the researcher into more specific topics where necessary. Fifteen usable sessions form the basis of the study. Eleven children were successful in finding information, a rate of 73% compared to 69% in assigned research questions, and 50% in assigned fact-finding questions. Eighty-seven percent began using one or two keyword searches. Spelling was a problem. Successful children made fewer keyword searches and the number of search moves averaged 5.5 as compared to 2.4 on the research oriented task and 3.49 on the factual. Backtracking and looping were common. The self-generated task was preferred by 47% of the subjects.
    Type
    a
  18. Fischer, T.; Neuroth, H.: SSG-FI - special subject gateways to high quality Internet resources for scientific users (2000) 0.02 
    0.021590449 = product of:
  0.043180898 = sum of:
    0.043180898 = sum of:
      0.005740611 = weight(_text_:a in 4873) [ClassicSimilarity], result of:
        0.005740611 = score(doc=4873,freq=4.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.10809815 = fieldWeight in 4873, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=4873)
      0.037440285 = weight(_text_:22 in 4873) [ClassicSimilarity], result of:
        0.037440285 = score(doc=4873,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.23214069 = fieldWeight in 4873, 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=4873)
  0.5 = coord(1/2)
    Abstract
    Project SSG-FI at SUB Göttingen provides special subject gateways to international high quality Internet resources for scientific users. Internet sites are selected by subject specialists and described using an extension of qualified Dublin Core metadata. A basic evaluation is added. These descriptions are freely available and can be searched and browsed. These are now subject gateways for 3 subject ares: earth sciences (GeoGuide); mathematics (MathGuide); and Anglo-American culture (split into HistoryGuide and AnglistikGuide). Together they receive about 3.300 'hard' requests per day, thus reaching over 1 million requests per year. The project SSG-FI behind these guides is open to collaboration. Institutions and private persons wishing to contribute can notify the SSG-FI team or send full data sets. Regular contributors can request registration with the project to access the database via the Internet and create and edit records
    Date
    22. 6.2002 19:40:42
    Type
    a
  19. Large, A.; Beheshti, J.; Rahman, T.: Design criteria for children's Web portals : the users speak out (2002) 0.02 
    0.021590449 = product of:
  0.043180898 = sum of:
    0.043180898 = sum of:
      0.005740611 = weight(_text_:a in 197) [ClassicSimilarity], result of:
        0.005740611 = score(doc=197,freq=4.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.10809815 = fieldWeight in 197, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=197)
      0.037440285 = weight(_text_:22 in 197) [ClassicSimilarity], result of:
        0.037440285 = score(doc=197,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.23214069 = fieldWeight in 197, 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=197)
  0.5 = coord(1/2)
    Date
    2. 6.2005 10:34:22
    Type
    a
  20. Baeza-Yates, R.; Boldi, P.; Castillo, C.: Generalizing PageRank : damping functions for linkbased ranking algorithms (2006) 0.02 
    0.02067415 = product of:
  0.0413483 = sum of:
    0.0413483 = sum of:
      0.010148063 = weight(_text_:a in 2565) [ClassicSimilarity], result of:
        0.010148063 = score(doc=2565,freq=18.0), product of:
          0.053105544 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046056706 = queryNorm
          0.19109234 = fieldWeight in 2565, product of:
            4.2426405 = tf(freq=18.0), with freq of:
              18.0 = termFreq=18.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.0390625 = fieldNorm(doc=2565)
      0.03120024 = weight(_text_:22 in 2565) [ClassicSimilarity], result of:
        0.03120024 = score(doc=2565,freq=2.0), product of:
          0.16128273 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.046056706 = queryNorm
          0.19345059 = fieldWeight in 2565, 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=2565)
  0.5 = coord(1/2)
    Abstract
    This paper introduces a family of link-based ranking algorithms that propagate page importance through links. In these algorithms there is a damping function that decreases with distance, so a direct link implies more endorsement than a link through a long path. PageRank is the most widely known ranking function of this family. The main objective of this paper is to determine whether this family of ranking techniques has some interest per se, and how different choices for the damping function impact on rank quality and on convergence speed. Even though our results suggest that PageRank can be approximated with other simpler forms of rankings that may be computed more efficiently, our focus is of more speculative nature, in that it aims at separating the kernel of PageRank, that is, link-based importance propagation, from the way propagation decays over paths. We focus on three damping functions, having linear, exponential, and hyperbolic decay on the lengths of the paths. The exponential decay corresponds to PageRank, and the other functions are new. Our presentation includes algorithms, analysis, comparisons and experiments that study their behavior under different parameters in real Web graph data. Among other results, we show how to calculate a linear approximation that induces a page ordering that is almost identical to PageRank's using a fixed small number of iterations; comparisons were performed using Kendall's tau on large domain datasets.
    Date
    16. 1.2016 10:22:28
    Type
    a

Authors

Types

  • a 251
  • el 24
  • m 12
  • r 2
  • s 1
  • x 1
  • More… Less…

Themes

Subjects

Classifications