Search (206 results, page 2 of 11)

  • × language_ss:"e"
  • × type_ss:"a"
  • × year_i:[1960 TO 1970}
  1. Mulvihill, J.G.; Brenner, E.H.: Faceted organization of a thesaurus vocabulary (1966) 0.00 
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  2. Neelameghan, A.: Design of scheme for classification (1969) 0.00 
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  3. Vickery, B.C.: Thesaurus: a new word in documentation (1960) 0.00 
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  4. Freeman, C.B.: ¬The new schedules : a note (1965) 0.00 
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  5. Bertalanffy, L. von: General systems theory : a critical review (1962) 0.00 
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  6. Costello, J.C.: ¬A basic theory of roles as syntactical control devices in coordinate indexes (1964) 0.00 
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  7. Borko, H.: Determining user requirements for an information storage and retrieval system : a systems approach (1962) 0.00 
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  8. Connor, J.H.: Selective dissemination of information : a review of the literatur and the issue (1967) 0.00 
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  9. Fischer, M.: ¬The KWIC-Index concept : a retrospective view (1966) 0.00 
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  10. Malin, M.V.: ¬The Science Citation Index : a new concept in indexing (1968) 0.00 
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  11. Zadeh, L.A.: Fuzzy sets (1965) 0.00 
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    Abstract
    A fuzzy set is a class of objects with a continuum of grades of membership. Such a set is characterized by a membership (characteristic) function which assigns to each object a grade of membership ranging between zero and one. The notions of inclusion, union, intersection, complement, relation, convexity, etc., are extended to such sets, and various properties of theses notions in the context of fuzzy sets are established. In particular, a separation theorem for convex fuzzy sets is proved without requiring that the fuzzy sets be disjoint
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  12. Cooper, W.S.: Expected search length : a single measure of retrieval effectiveness based on the weak ordering action of retrieval systems (1968) 0.00 
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  13. Holm, B.E.; Rasmussen, L.E.: Development of a technical thesaurus (1961) 0.00 
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  14. Maizell, R.E.: International Conference for standards on a common language for machine searching and translation (1960) 0.00 
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  15. Goffman, W.: ¬A searching procedure for information retrieval (1964) 0.00 
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    Abstract
    A search procedure for an information retrieval system is developed whereby the answer to a question is obtained by maximizing an evaluation function of the system's output in terms of the probility of relevance. Necessary and sufficient conditions are given for a set to be an answer to a query. A partition of the file is made in such way that all documents belonging to the answer are members of the same class. Hence the answer can be generated by one relevant document. In this manner a search of the total file is avoided
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  16. Soergel, D.: Mathematical analysis of documentation systems : an attempt to a theory of classification and search request formulation (1967) 0.00 
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    Abstract
    As an attempt to make a general structural theory of information retrieval, a documentation system (DS) is defined as a formal system consisting of (a) a set o of objects (documents); (b) a set A++ of elementary attributes (key-words), from which further attributes may be constructed: A++ generates A; (c) a set of axioms of the form X++(x)=m (m¯M, M a set of constant connecting attributes with objects: from the axioms further theorems (=true statements) may be constructed. By use of the theorems, different mappings O -> P(o) (P(o) set of all subsets of o) (search question -> set of documents retrieved) are defined. The type of a DS depends on two basic decisions: (1) choice of the rules for the construction of attributes and theorems, e.g., logical product in coordinate indexing; links. (2) choice of M; M may consist of the two constants 'applicable' and 'not applicable', or some positive integers, ...; Further practical decisions: A++ hierarchical or not; kind of mapping; introduction of roles (=further attributes). The most simple case - ordinary two-valued Coordinate Indexing - is discusssed in detail; o is a free distributive (but not Boolean) lattice, the homographic image a ring of subsets of o; instead of negation which is not useful, a useful retrieval operation 'praeternagation' is introduced. Furthermore these are discussed: a generalized definition of superimposed coding, some functions for the distance of objects or attributes; optimization and automatic derivation of classifications. The model takes into account term-term relations and document-document relations. It may serve as a structural framework in terms of which the functional problems of retrieval theory may be expressed more clearly
    Type
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  17. Melton, J.S.: ¬A use for the techniques of structural linguistics in documentation research (1965) 0.00 
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    Abstract
    Index language (the system of symbols for representing subject content after analysis) is considered as a separate component and a variable in an information retrieval system. It is suggested that for purposes of testing, comparing and evaluating index language, the techniques of structural linguistics may provide a descriptive methodology by which all such languages (hierarchical and faceted classification, analytico-synthetic indexing, traditional subject indexing, indexes and classifications based on automatic text analysis, etc.) could be described in term of a linguistic model, and compared on a common basis
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  18. Barnholdt, B.: ¬A computer-based system for production of a UDC-classed libray catalog at the Technological University Library of Denmark (1968) 0.00 
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  19. May, K.O.: Quantitative growth of the mathematical literature (1966) 0.00 
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  20. Booth, A.D.: On the geometry of libraries (1969) 0.00 
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