Search (77 results, page 4 of 4)

  • × language_ss:"e"
  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  1. Tudhope, D.; Binding, C.; Blocks, D.; Cunliffe, D.: FACET: thesaurus retrieval with semantic term expansion (2002) 0.00 
    0.0033721137 = product of:
  0.0067442274 = sum of:
    0.0067442274 = product of:
      0.020232681 = sum of:
        0.020232681 = weight(_text_:j in 175) [ClassicSimilarity], result of:
          0.020232681 = score(doc=175,freq=2.0), product of:
            0.14407988 = queryWeight, product of:
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.04534384 = queryNorm
            0.14042683 = fieldWeight in 175, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.03125 = fieldNorm(doc=175)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
    Abstract
    There are many advantages for Digital Libraries in indexing with classifications or thesauri, but some current disincentive in the lack of flexible retrieval tools that deal with compound descriptors. This demonstration of a research prototype illustrates a matching function for compound descriptors, or multi-concept subject headings, that does not rely on exact matching but incorporates term expansion via thesaurus semantic relationships to produce ranked results that take account of missing and partially matching terms. The matching function is based on a measure of semantic closeness between terms.The work is part of the EPSRC funded FACET project in collaboration with the UK National Museum of Science and Industry (NMSI) which includes the National Railway Museum. An export of NMSI's Collections Database is used as the dataset for the research. The J. Paul Getty Trust's Art and Architecture Thesaurus (AAT) is the main thesaurus in the project. The AAT is a widely used thesaurus (over 120,000 terms). Descriptors are organised in 7 facets representing separate conceptual classes of terms.The FACET application is a multi tiered architecture accessing a SQL Server database, with an OLE DB connection. The thesauri are stored as relational tables in the Server's database. However, a key component of the system is a parallel representation of the underlying semantic network as an in-memory structure of thesaurus concepts (corresponding to preferred terms). The structure models the hierarchical and associative interrelationships of thesaurus concepts via weighted poly-hierarchical links. Its primary purpose is real-time semantic expansion of query terms, achieved by a spreading activation semantic closeness algorithm. Queries with associated results are stored persistently using XML format data. A Visual Basic interface combines a thesaurus browser and an initial term search facility that takes into account equivalence relationships. Terms are dragged to a direct manipulation Query Builder which maintains the facet structure.
  2. Layfield, C.; Azzopardi, J,; Staff, C.: Experiments with document retrieval from small text collections using Latent Semantic Analysis or term similarity with query coordination and automatic relevance feedback (2017) 0.00 
    0.0033721137 = product of:
  0.0067442274 = sum of:
    0.0067442274 = product of:
      0.020232681 = sum of:
        0.020232681 = weight(_text_:j in 3478) [ClassicSimilarity], result of:
          0.020232681 = score(doc=3478,freq=2.0), product of:
            0.14407988 = queryWeight, product of:
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.04534384 = queryNorm
            0.14042683 = fieldWeight in 3478, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.03125 = fieldNorm(doc=3478)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  3. Chen, H.; Zhang, Y.; Houston, A.L.: Semantic indexing and searching using a Hopfield net (1998) 0.00 
    0.0030923137 = product of:
  0.0061846273 = sum of:
    0.0061846273 = product of:
      0.018553881 = sum of:
        0.018553881 = weight(_text_:h in 5704) [ClassicSimilarity], result of:
          0.018553881 = score(doc=5704,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.16469726 = fieldWeight in 5704, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.046875 = fieldNorm(doc=5704)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  4. Pahlevi, S.M.; Kitagawa, H.: Conveying taxonomy context for topic-focused Web search (2005) 0.00 
    0.0030923137 = product of:
  0.0061846273 = sum of:
    0.0061846273 = product of:
      0.018553881 = sum of:
        0.018553881 = weight(_text_:h in 3310) [ClassicSimilarity], result of:
          0.018553881 = score(doc=3310,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.16469726 = fieldWeight in 3310, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.046875 = fieldNorm(doc=3310)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  5. Wang, Y.-H.; Jhuo, P.-S.: ¬A semantic faceted search with rule-based inference (2009) 0.00 
    0.0030923137 = product of:
  0.0061846273 = sum of:
    0.0061846273 = product of:
      0.018553881 = sum of:
        0.018553881 = weight(_text_:h in 540) [ClassicSimilarity], result of:
          0.018553881 = score(doc=540,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.16469726 = fieldWeight in 540, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.046875 = fieldNorm(doc=540)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  6. Chen, H.; Lally, A.M.; Zhu, B.; Chau, M.: HelpfulMed : Intelligent searching for medical information over the Internet (2003) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 1615) [ClassicSimilarity], result of:
          0.015461569 = score(doc=1615,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 1615, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1615)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  7. Kruschwitz, U.; AI-Bakour, H.: Users want more sophisticated search assistants : results of a task-based evaluation (2005) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 4575) [ClassicSimilarity], result of:
          0.015461569 = score(doc=4575,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 4575, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4575)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  8. Tudhope, D.; Alani, H.; Jones, C.: Augmenting thesaurus relationships : possibilities for retrieval (2001) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 1520) [ClassicSimilarity], result of:
          0.015461569 = score(doc=1520,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1520)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  9. Bhansali, D.; Desai, H.; Deulkar, K.: ¬A study of different ranking approaches for semantic search (2015) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 2696) [ClassicSimilarity], result of:
          0.015461569 = score(doc=2696,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 2696, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2696)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  10. Liu, X.; Zheng, W.; Fang, H.: ¬An exploration of ranking models and feedback method for related entity finding (2013) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 2714) [ClassicSimilarity], result of:
          0.015461569 = score(doc=2714,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 2714, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2714)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  11. Xu, B.; Lin, H.; Lin, Y.: Assessment of learning to rank methods for query expansion (2016) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 2929) [ClassicSimilarity], result of:
          0.015461569 = score(doc=2929,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 2929, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2929)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  12. Järvelin, A.; Keskustalo, H.; Sormunen, E.; Saastamoinen, M.; Kettunen, K.: Information retrieval from historical newspaper collections in highly inflectional languages : a query expansion approach (2016) 0.00 
    0.0025769281 = product of:
  0.0051538562 = sum of:
    0.0051538562 = product of:
      0.015461569 = sum of:
        0.015461569 = weight(_text_:h in 3223) [ClassicSimilarity], result of:
          0.015461569 = score(doc=3223,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.13724773 = fieldWeight in 3223, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3223)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  13. Hazrina, S.; Sharef, N.M.; Ibrahim, H.; Murad, M.A.A.; Noah, S.A.M.: Review on the advancements of disambiguation in semantic question answering system (2017) 0.00 
    0.0020615426 = product of:
  0.004123085 = sum of:
    0.004123085 = product of:
      0.012369255 = sum of:
        0.012369255 = weight(_text_:h in 3292) [ClassicSimilarity], result of:
          0.012369255 = score(doc=3292,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.10979818 = fieldWeight in 3292, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.03125 = fieldNorm(doc=3292)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
  14. ALA / Subcommittee on Subject Relationships/Reference Structures: Final Report to the ALCTS/CCS Subject Analysis Committee (1997) 0.00 
    0.0018038497 = product of:
  0.0036076994 = sum of:
    0.0036076994 = product of:
      0.010823098 = sum of:
        0.010823098 = weight(_text_:h in 1800) [ClassicSimilarity], result of:
          0.010823098 = score(doc=1800,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.096073404 = fieldWeight in 1800, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.02734375 = fieldNorm(doc=1800)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
    Content
    Enthält: Appendix A: Subcommittee on Subject Relationships/Reference Structures - REPORT TO THE ALCTS/CCS SUBJECT ANALYSIS COMMITTEE - July 1996 Appendix B (part 1): Taxonomy of Subject Relationships. Compiled by Dee Michel with the assistance of Pat Kuhr - June 1996 draft (alphabetical display) (Separat in: http://web2.ala.org/ala/alctscontent/CCS/committees/subjectanalysis/subjectrelations/msrscu2.pdf) Appendix B (part 2): Taxonomy of Subject Relationships. Compiled by Dee Michel with the assistance of Pat Kuhr - June 1996 draft (hierarchical display) Appendix C: Checklist of Candidate Subject Relationships for Information Retrieval. Compiled by Dee Michel, Pat Kuhr, and Jane Greenberg; edited by Greg Wool - June 1997 Appendix D: Review of Reference Displays in Selected CD-ROM Abstracts and Indexes by Harriette Hemmasi and Steven Riel Appendix E: Analysis of Relationships in Six LC Subject Authority Records by Harriette Hemmasi and Gary Strawn Appendix F: Report of a Preliminary Survey of Subject Referencing in OPACs by Gregory Wool Appendix G: LC Subject Referencing in OPACs--Why Bother? by Gregory Wool Appendix H: Research Needs on Subject Relationships and Reference Structures in Information Access compiled by Jane Greenberg and Steven Riel with contributions from Dee Michel and others edited by Gregory Wool Appendix I: Bibliography on Subject Relationships compiled mostly by Dee Michel with additional contributions from Jane Greenberg, Steven Riel, and Gregory Wool
  15. Case, D.O.: Looking for information : a survey on research on information seeking, needs, and behavior (2002) 0.00 
    0.0015461568 = product of:
  0.0030923137 = sum of:
    0.0030923137 = product of:
      0.0092769405 = sum of:
        0.0092769405 = weight(_text_:h in 1270) [ClassicSimilarity], result of:
          0.0092769405 = score(doc=1270,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.08234863 = fieldWeight in 1270, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.0234375 = fieldNorm(doc=1270)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
    Footnote
    Weitere Rez. in: iwp 65(2014) H.2, S.143-144 (C. Wolff)
  16. Context: nature, impact, and role : 5th International Conference on Conceptions of Library and Information Science, CoLIS 2005, Glasgow 2005; Proceedings (2005) 0.00 
    0.0012884641 = product of:
  0.0025769281 = sum of:
    0.0025769281 = product of:
      0.0077307844 = sum of:
        0.0077307844 = weight(_text_:h in 42) [ClassicSimilarity], result of:
          0.0077307844 = score(doc=42,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.06862386 = fieldWeight in 42, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.01953125 = fieldNorm(doc=42)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
    Footnote
    Rez. in: Mitt. VÖB 59(2006) H.3, S.100-103 (O. Oberhauser): "Dieses als Band 3507 der bekannten, seit 1973 erscheinenden Springer-Serie Lecture Notes in Computer Science (LNCS) publizierte Buch versammelt die Vorträge der 5. Tagung "Conceptions of Library and Information Science". CoLIS hat sich in den letzten anderthalb Jahrzehnten als internationales Forum für die Präsentation und Rezeption von Forschung auf den Fachgebieten Informatik und Informationswissenschaft etabliert. Auf die 1992 in Tampere (Finnland) anlässlich des damals 20jährigen Bestehens des dortigen Instituts für Informationswissenschaft abgehaltene erste Tagung folgten weitere in Kopenhagen (1996), Dubrovnik (1999) und Seattle, WA (2002). Die zuletzt an der Strathclyde University in Glasgow (2005) veranstaltete Konferenz war dem Thema "Context" im Rahmen der informationsbezogenen Forschung gewidmet, einem komplexen, dynamischen und multidimensionalen Begriff von grosser Bedeutung für das Verhalten und die Interaktion von Mensch und Maschine. . . .
  17. Ingwersen, P.; Järvelin, K.: ¬The turn : integration of information seeking and retrieval in context (2005) 0.00 
    0.0012884641 = product of:
  0.0025769281 = sum of:
    0.0025769281 = product of:
      0.0077307844 = sum of:
        0.0077307844 = weight(_text_:h in 1323) [ClassicSimilarity], result of:
          0.0077307844 = score(doc=1323,freq=2.0), product of:
            0.11265446 = queryWeight, product of:
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.04534384 = queryNorm
            0.06862386 = fieldWeight in 1323, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.4844491 = idf(docFreq=10020, maxDocs=44218)
              0.01953125 = fieldNorm(doc=1323)
      0.33333334 = coord(1/3)
  0.5 = coord(1/2)
    Footnote
    Rez. in: Mitt. VÖB 59(2006) H.2, S.81-83 (O. Oberhauser): "Mit diesem Band haben zwei herausragende Vertreter der europäischen Informationswissenschaft, die Professoren Peter Ingwersen (Kopenhagen) und Kalervo Järvelin (Tampere) ein Werk vorgelegt, das man vielleicht dereinst als ihr opus magnum bezeichnen wird. Mich würde dies nicht überraschen, denn die Autoren unternehmen hier den ambitionierten Versuch, zwei informations wissenschaftliche Forschungstraditionen, die einander bisher in eher geringem Ausmass begegneten, unter einem gesamtheitlichen kognitiven Ansatz zu vereinen - das primär im sozialwissenschaftlichen Bereich verankerte Forschungsgebiet "Information Seeking and Retrieval" (IS&R) und das vorwiegend im Informatikbereich angesiedelte "Information Retrieval" (IR). Dabei geht es ihnen auch darum, den seit etlichen Jahren zwar dominierenden, aber auch als zu individualistisch kritisierten kognitiven Ansatz so zu erweitern, dass technologische, verhaltensbezogene und kooperative Aspekte in kohärenter Weise berücksichtigt werden. Dies geschieht auf folgende Weise in neun Kapiteln: - Zunächst werden die beiden "Lager" - die an Systemen und Laborexperimenten orientierte IR-Tradition und die an Benutzerfragen orientierte IS&R-Fraktion - einander gegenübergestellt und einige zentrale Begriffe geklärt. - Im zweiten Kapitel erfolgt eine ausführliche Darstellung der kognitiven Richtung der Informationswissenschaft, insbesondere hinsichtlich des Informationsbegriffes. - Daran schliesst sich ein Überblick über die bisherige Forschung zu "Information Seeking" (IS) - eine äusserst brauchbare Einführung in die Forschungsfragen und Modelle, die Forschungsmethodik sowie die in diesem Bereich offenen Fragen, z.B. die aufgrund der einseitigen Ausrichtung des Blickwinkels auf den Benutzer mangelnde Betrachtung der Benutzer-System-Interaktion. - In analoger Weise wird im vierten Kapitel die systemorientierte IRForschung in einem konzentrierten Überblick vorgestellt, in dem es sowohl um das "Labormodell" als auch Ansätze wie die Verarbeitung natürlicher Sprache und Expertensysteme geht. Aspekte wie Relevanz, Anfragemodifikation und Performanzmessung werden ebenso angesprochen wie die Methodik - von den ersten Laborexperimenten bis zu TREC und darüber hinaus.

Authors

Years

Types

  • a 73
  • el 7
  • m 3
  • r 1
  • s 1
  • More… Less…

Themes

Subjects

Classifications