Search (84 results, page 2 of 5)

  • × theme_ss:"Konzeption und Anwendung des Prinzips Thesaurus"
  • × year_i:[1990 TO 2000}
  1. Spiteri, L.F.: ¬The essential elements of faceted thesauri (1999) 0.01 
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    Abstract
    The goal of this study is to evaluate, compare, and contrast how facet analysis is used to construct the systematic or faceted displays of a selection of information retrieval thesauri. More specifically, the study seeks to examine which principles of facet analysis are used in the thesauri, and the extent to which different thesauri apply these principles in the same way. A measuring instrument was designed for the purpose of evaluating the structure of faceted thesauri. This instrument was applied to fourteen faceted information retrieval thesauri. The study reveals that the thesauri do not share a common definition of what constitutes a facet. In some cases, the thesauri apply both enumerative-style classification and facet analysis to arrange their indexing terms. A number of the facets used in the thesauri are not homogeneous or mutually exclusive. The principle of synthesis is used in only 50% of the thesauri, and no one citation order is used consistently by the thesauri.
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Spiteri, L.F.: ¬The use of facet analysis in information retrieval thesauri : an examination of selected guidelines for thesaurus construction (1997) 0.01 
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    Abstract
    Facet analysis has been used in the construction of faceted thesauri since the publication of the Information Retrieval Thesaurus of Education Terms in 1968. In spite of the growth in the number of faceted thesauri since then, there appears to be little consensus among thesaurus designers regarding how the principles of facet analysis are to be used in thesauri. An examination of various national and international guidelines for thesaurus construction reveals that they emphasize primarily the construction of alphabetical thesauri, but provide little guidance in the use of facet analysis in thesauri.
  3. Alonso, M.A.L.: ¬Un tesauro conceptual para la recuperacion de la informacion juridica comercial (1998) 0.01 
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    Abstract
    The Commercial Law Thesaurus was elaborated as an application of a doctoral investigation into the application of a conceptual model to legal information retrieval. Justifies the need for such a thesaurus, briefly describes the genesis of its construction, and outlines conclusions obtained. Validates the efficiency of the thesaurus in the monitoring carried out in the legal database Juridoc and comments on the display of results as categorized, alphabetical, permuted and conceptual indexes
    Footnote
    Übers. d. Titels: A cognitive thesaurus for retrieval of legal commercial information
  4. Conlon, S.P.N.; Evens, M.; Ahlswede, T.: Developing a large lexical database for information retrieval, parsing, and text generation systems (1993) 0.01 
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    Abstract
    Shows that it is possible to construct a lexical database by combining material from a number of machine-readable sources. Discusses the kind of lexical information required for applications in information retrieval and in other natural language processing areas, such as database interfaces and automatic filing systems. Describes the organization of the lexical database which is stored in an Oracle relational database management system and the design of the tables that comprise the database. In addition to the traditional alphabetic listing, access is privided from roots to derived forms and from derived forms to roots, and also through lexical and semantic relations between words, so that the database functions as a thesaurus as well as a dictionary. The database is designed to be open-ended and self-defined. Every attribute of every table is defined in the database itself. The lexical database can easily be extended through an SQL forms interface that facilitates additions to the tables
    Source
    Information processing and management. 29(1993) no.5, S.415-431
  5. Jones, S.: ¬A thesaurus data model for an intelligent retrieval system (1993) 0.01 
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    Abstract
    This paper demonstrates the application of conventional database design techniques to thesaurus representation. The thesaurus is considered as a printed document, as a semantic net, and as a relational database to be used in conjunction with an intelligent information retrieval system. Some issues raised by analysis of two standard thesauri include: the prevalence of compound terms and the representation of term structure; thesaurus redundancy and the extent to which it can be eliminated in machine-readable versions; the difficulty of exploiting thesaurus knowledge originally designed for human rather than automatic interpretation; deriving 'strength of association' measures between terms in a thesaurus considered as a semantic net; facet representation and the need for variations in the data model to cater for structural differences between thesauri. A complete schema of database tables is presented, with an outline suggestion for using the stored information when matching one or more thesaurus terms with a user's query
    Source
    Journal of information science. 19(1993), S.167-178
  6. Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995) 0.00 
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    Source
    Searcher. 3(1995) no.8, S.18-22
    Theme
    Verbale Doksprachen im Online-Retrieval
  7. Harter, S.P.; Cheng, Y.-R.: Colinked descriptors : improving vocabulary selection for end-user searching (1996) 0.00 
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    Abstract
    This article introduces a new concept and technique for information retrieval called 'colinked descriptors'. Borrowed from an analogous idea in bibliometrics - cocited references - colinked descriptors provide a theory and method for identifying search terms that, by hypothesis, will be superior to those entered initially by a searcher. The theory suggests a means of moving automatically from 2 or more initial search terms, to other terms that should be superior in retrieval performance to the 2 original terms. A research project designed to test this colinked descriptor hypothesis is reported. The results suggest that the approach is effective, although methodological problems in testing the idea are reported. Algorithms to generate colinked descriptors can be incorporated easily into system interfaces, front-end or pre-search systems, or help software, in any database that employs a thesaurus. The potential use of colinked descriptors is a strong argument for building richer and more complex thesauri that reflect as many legitimate links among descriptors as possible
    Source
    Journal of the American Society for Information Science. 47(1996) no.4, S.311-325
  8. Schmitz-Esser, W.: Publikumsfragen an Literatur zur Zeitgeschichte (1993) 0.00 
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    Abstract
    Darstellung zur Entwicklung eines Thesaurus für die Bibliothek des Hauses der Geschichte der Bundesrepublik Deutschland und seiner Anwendung auf die vorhandene Literatur (1300 Deskriptoren und 300 Modifikatoren)
  9. Pollard, R.: Hypertext presentation of thesauri used in on-line searching (1990) 0.00 
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    Abstract
    Explores the strengths and limitations of hypertext for the online presentation of thesauri used in information retrieval. Examines the ability of hypertext to support each of 3 common types of thesaurus display: graphic, alphabetical, and hierarchical. Presents a design for a hypertext-based hierarchical display that addresses many inadequacies of printed hierarchical displays. Ullustrates how the design might be implemented using a commercially available hypertext system. Considers issues related to the implementation and evaluation of hypertext-based thesauri
  10. Krooks, D.A.; Lancaster, F.W.: ¬The evolution of guidelines for thesaurus construction (1993) 0.00 
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    Abstract
    This piece of research traces the evolution of guidelines and principles for the construction of information retrieval thesauri from 1959 to 1993. We conclude that the majority of the basic problems of thesaurus construction has already been identified and solved by 1967 and that Eugene Wall, more than any other individual, has profoundly influenced the entire development in this area
  11. Schmitz-Esser, W.: Thesauri facing new challenges (1990) 0.00 
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    Abstract
    The chairman of the thesaurus software seminar held on 14.8.1990 in Darmstadt, introduces into the topics by asking the following 10 questions and by providing his answers to them: (1) what is new in the view? (2) what is the real point of attraction? (3) cannot information retrieval profit from machine processing of language? (4) can we do better now? (5) how van we do better? (6) when does fully automatic IR arrive? (7) thesauri for machine-aided IR - how do we get there? (8) which is the right way, which is the model, what to standardize? (9) can IR people do it alone? (10) are there advanced information services with a truly human interface
  12. Zimmermann, H.H.: Automatische Indexierung und elektronische Thesauri (1996) 0.00 
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  13. Schmitz-Esser, W.: New approaches in thesaurus application (1991) 0.00 
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    Abstract
    To show the difference and explain the move to a new kind of thesauri in the information science area, some of the main characteristics of conventional thesauri are pointed out as well as their side-effects. The new approaches for thesauri apllication are seen to exist in (1) expert systems, (2) interface systems, (3) object oriented design and programming, (4) hypertext systems, (5) machine translation, and (6) machine abstracting. These areas are shortly described including also the new problem which they might create. A discussion of the limitations of the new thesaurus application areas finishes the article which challenges, finally, an awareness to meet the new possibilities of a thesaural retrieval
  14. Chen, H.; Martinez, J.; Kirchhoff, A.; Ng, T.D.; Schatz, B.R.: Alleviating search uncertainty through concept associations : automatic indexing, co-occurence analysis, and parallel computing (1998) 0.00 
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    Abstract
    In this article, we report research on an algorithmic approach to alleviating search uncertainty in a large information space. Grounded on object filtering, automatic indexing, and co-occurence analysis, we performed a large-scale experiment using a parallel supercomputer (SGI Power Challenge) to analyze 400.000+ abstracts in an INSPEC computer engineering collection. Two system-generated thesauri, one based on a combined object filtering and automatic indexing method, and the other based on automatic indexing only, were compaed with the human-generated INSPEC subject thesaurus. Our user evaluation revealed that the system-generated thesauri were better than the INSPEC thesaurus in 'concept recall', but in 'concept precision' the 3 thesauri were comparable. Our analysis also revealed that the terms suggested by the 3 thesauri were complementary and could be used to significantly increase 'variety' in search terms the thereby reduce search uncertainty
    Source
    Journal of the American Society for Information Science. 49(1998) no.3, S.206-216
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  15. Zainab, A.N.; Silva, S.M. de: Expert systems in library and information services : publication trends, authorship patterns and expressiveness of published titles (1998) 0.00 
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    Abstract
    Presents a state of the art review of the literature of expert systems in library and information science, involving exhaustive searches of all major LIS CD-ROM databases (LISA, ERIC, LiLi, INSPEC etc.) and bibliographies appended in review articles. The search retrieved 679 references, comprising 362 periodical articles, 180 conference proceedings, 63 books articles, 28 theses and 46 monographs. The growth of the literature peaked between 1989 and 1990 and subsequently declined after 1992. Over 1/3 (287) covered intelligent front ends and interfaces for online searching and retrieval, followed by applications in reference service (113), classification, indexing and abstracting (86) and cataloguing (7). The most productive periodicals comprised 6 titles, of which 'Information processing and management' topped the lsit: 43 authors were found to contribute between 5 and 35 articles each, hence contributing 32,19% of the total contributors. 382 of the publications were single author works, 172 were by 2 authors, 72 were by 3 authors and 49 were by 4 or more authors. Only 161 titles were expressive enough to reveal both the name and function of systems being developed
    Source
    Journal of information science. 24(1998) no.5, S.313-336
  16. Dupuis, P.; Lapointe, J.: Developpement d'un outil documentaire à Hydro-Quebec : le Thesaurus HQ (1997) 0.00 
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    Abstract
    Describes the backgroud to the construction of a thesaurus at Hydro-Quebec, Quebec, Canada. Several information units, linked to form a network, share the same bibliographic database. The need for coherence and efficiency was the principle motive for the construction of the multidisciplinary thesaurus. Describes the construction process, discusses the specifity of the tool, its circulation, and considers its use on a partnership basis with other information services
    Footnote
    Übers. des Titels: The development of an information tool at Hydro-Quebec: the HQ Thesaurus
    Source
    Argus. 26(1997) no.3, S.16-22
  17. Nielsen, M.L.: Future thesauri : what kind of conceptual knowledge do searchers need? (1998) 0.00 
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    Abstract
    For more than thirty years thesauri have been valuable tools in information retrieval. Originally, the basic function of the thesauri was to help the indexer to transform concepts and their relationships, as expressed in the language of documents, into the more regularised indexing language of catalogues and databases. In the nineties another important purpose of the thesauri is to guide the searcher to the best search terms. In spite of the new role, the design of the thesauri has remained more or less stable. This paper explores the demands which are put on the thesauri in relation to searching. Findings are presented in the form of generalisations and moreover illustrated in relation to a real-life situation. Suggestions for improved functionality are presented in the form of a prototype of a thesaurus record. The new role as a conceptual searching tool is also influencing the construction process. Therefore, the paper ends up with a discussion of new methods for thesaurus construction
  18. Chen, H.: Generating, integrating and activating thesauri for concept-based document retrieval (1993) 0.00 
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  19. Busch, J.A.: Building and accessing vocabulary resources for networked resource discovery and navigation (1998) 0.00 
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    Abstract
    The Getty has a lenghty history in the research and development of thesauri and other structured vocabulary tools to make the use and exchange of electronic information easier
    Date
    22. 9.1997 19:16:05
    Imprint
    Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
    Source
    Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
  20. Riege, U.: Thesaurus und Klassifikation Sozialwissenschaften : Entwicklung der elektronischen Versionen (1998) 0.00 
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    Source
    Information und Märkte: 50. Deutscher Dokumentartag 1998, Kongreß der Deutschen Gesellschaft für Dokumentation e.V. (DGD), Rheinische Friedrich-Wilhelms-Universität Bonn, 22.-24. September 1998. Hrsg. von Marlies Ockenfeld u. Gerhard J. Mantwill

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