-
Blagden, J.F.: How much noise in a role-free and link-free co-ordinate indexing system? (1966)
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- Abstract
- A study of the number of irrelevant documents retrieved in a co-ordinate indexing system that does not employ eitherr roles or links. These tests were based on one hundred actual inquiries received in the library and therefore an evaluation of recall efficiency is not included. Over half the enquiries produced no noise, but the mean average percentage niose figure was approximately 33 per cent based on a total average retireval figure of eighteen documents per search. Details of the size of the indexed collection, methods of indexing, and an analysis of the reasons for the retrieval of irrelevant documents are discussed, thereby providing information officers who are thinking of installing such a system with some evidence on which to base a decision as to whether or not to utilize these devices
- Source
- Journal of documentation. 22(1966), S.203-209
-
Cooper, W.S.: Expected search length : a single measure of retrieval effectiveness based on the weak ordering action of retrieval systems (1968)
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-
Climeson, W.D.: File organization and search techniques (1966)
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-
Jonker, F.: Indexing theory, indexing methods, and search devices (1964)
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-
Rübesame, O.: Probleme des geographischen Schlüssels (1963)
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- Date
- 17. 1.1999 13:22:22
-
Goffman, W.: ¬A searching procedure for information retrieval (1964)
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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
-
Fill, K.: ¬Die Dezimalklassifikation im allgemeinen und in Deutschland (1967)
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- Source
- DK-Mitteilungen. 12(1967) Nr.5, S.19-22
-
Meyer-Uhlenried, K.H.: Ordnungsprinzipien der Speicherung in der Dokumentation (1965)
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- Source
- Nachrichten für Dokumentation. 16(1965), S.18-22
-
Schön, J.: Zum Gedenken an Paul Otlet : 1868-1944 (1968)
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- Source
- DK-Mitteilungen. 13(1968) Nr.6, S.21-22
-
Mann, G.: ¬Der Systematische Katalog in Institutionsbibliotheken am Beispiel der Medizinhistorik (1962)
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- Date
- 3.10.2000 10:22:29
-
Chomsky, N.: Aspects of the theory of syntax (1965)
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- Date
- 6. 1.1999 10:29:22
-
Hockett, C.F.: ¬The problem of universals in language (1963)
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- Pages
- S. 1-22
-
Jonzeck, M.: ¬Die Aktivierung, Verbesserung und Neuorientierung der Informationstätigkeit der allgemeinen öffentlichen Bibliotheken (1965)
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- Source
- Bibliothekar. 19(1965), S.15-22
-
Reblin, B.: ¬Die neue "Systematik für Allgemeinbildende Bibliotheken" (1963)
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- Date
- 5. 8.1999 15:16:22
-
Soergel, D.: Mathematical analysis of documentation systems : an attempt to a theory of classification and search request formulation (1967)
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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
-
Goffman, W.: ¬An indirect method of information retrieval (1968)
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- Abstract
- The information retrieval process, treated strictly as a matching procedure, has the defects that the whole file must be probed for each query, and that it overlooks the facts that the relevance of the information from one document depends upon what is already known about the subject, and in turn affects the relevance of other documents subsequently examined. A mathematical model of a search technique in which the defects of the direct method are taken into account is demonstrated by an experiment in which a given paper is treated as an enquiry and the references cited in the paper are treated as relevant answers. The results in two tests show much better results than those achieved by the direct method. No spurious material was retrieved by either method
-
Coates, E.J.: CRG proposals for a new general classification (1969)
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- Pages
- S.19-22
-
Barden, B.R.; Denison, B.: Guide to the SLA loan collection of classification schemes and subject heading lists on deposit at Western Reserve Univ. as of March 20, 1961 (1961)
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- Footnote
- Rez. in: College and research libraries 22(1961) no.6, S.483-484 (A.R. Lindsay)
-
Cleverdon, C.W.: ASLIB Cranfield Research Project : Report on the first stage of an investigation into the comparative efficiency of indexing systems (1960)
0.01
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- Footnote
- Rez. in: College and research libraries 22(1961) no.3, S.228 (G. Jahoda)
-
Taylor, R.S.: Question negotiation and information seeking in libraries (1968)
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- Abstract
- Seekers of information in libraries either go through a librarian intermediary or they help themselves. When they go through librarians they must develop their questions through four levels of need, referred to here as the visceral, conscious, formalized, and compromised needs. In his pre-search interview with an information seeker the reference librarian attempts to help him arrive at an understanding of his 'compromised' need by determining: (1) the subject of his interest; (2) his motivation; (3) his personal characteristics; (4) the relationship of the inquiry to file organization; and (5) anticipated answers. The author contends that research is needed into the techniques of conducting this negotiation between the user and the reference librarian
