Search (279 results, page 1 of 14)

  • × year_i:[1980 TO 1990}
  1. Malsburg, C. von der: ¬The correlation theory of brain function (1981) 0.10 
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    Abstract
    A summary of brain theory is given so far as it is contained within the framework of Localization Theory. Difficulties of this "conventional theory" are traced back to a specific deficiency: there is no way to express relations between active cells (as for instance their representing parts of the same object). A new theory is proposed to cure this deficiency. It introduces a new kind of dynamical control, termed synaptic modulation, according to which synapses switch between a conducting and a non- conducting state. The dynamics of this variable is controlled on a fast time scale by correlations in the temporal fine structure of cellular signals. Furthermore, conventional synaptic plasticity is replaced by a refined version. Synaptic modulation and plasticity form the basis for short-term and long-term memory, respectively. Signal correlations, shaped by the variable network, express structure and relationships within objects. In particular, the figure-ground problem may be solved in this way. Synaptic modulation introduces exibility into cerebral networks which is necessary to solve the invariance problem. Since momentarily useless connections are deactivated, interference between di erent memory traces can be reduced, and memory capacity increased, in comparison with conventional associative memory
    Source
    http%3A%2F%2Fcogprints.org%2F1380%2F1%2FvdM_correlation.pdf&usg=AOvVaw0g7DvZbQPb2U7dYb49b9v_
  2. Burgess, C.; Swigger, K.: ¬A graphical database interface for casual naive users (1986) 0.08 
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    Source
    Information processing and management. 22(1986) no.6, S.511-521
  3. Griffith, C.: What's all the hype about hypertext? (1989) 0.06 
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    Source
    Information today. 6(1989) no.4, S.22-24
  4. Walker, S.: ¬The Okapi online catalogue research projects (1989) 0.06 
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    Date
    16. 8.1998 11:22:08
    Source
    The Online catalogue: development and directions. Ed.: C. Hildreth
  5. Walker, A.: Australia's pictorial collections on interactive videodisc (1989) 0.05 
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    Date
    3. 1.1999 11:22:04
    Source
    Proceedings of the 2nd Pacific Conference on the New Information Technology for Library and Information Professionals. Ed. by C.-c. Chen and D.I. Raitt, MicroUse Information and FID
  6. Bezzel, C.: Wittgenstein zur Einführung (1988) 0.05 
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    Date
    15. 7.2000 14:03:22
  7. Schwarz, C.: THESYS: Thesaurus Syntax System : a fully automatic thesaurus building aid (1988) 0.04 
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    Date
    6. 1.1999 10:22:07
  8. Schwarz, C.: Probleme der syntaktischen Indexierung (1986) 0.03 
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    Source
    Informationslinguistische Texterschließung. Hrsg.: C. Schwarz u. G. Thurmair
  9. Chen, C.-C.; Hernon, P.: Information seeking : assessing and anticipating user needs (1982) 0.03 
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  10. Dahlberg, I.: Conceptual definitions for INTERCONCEPT (1981) 0.03 
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    Source
    International classification. 8(1981), S.16-22
  11. Pietris, M.K.D.: LCSH update (1988) 0.03 
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    Source
    Cataloguing Australia. 13(1988), S.19-22
  12. Woods, W.A.: What's important about knowledge representation? (1983) 0.03 
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    Source
    Computer. 16(1983) no.10, S.22-27
  13. Tenopir, C.: Full text database retrieval performance (1985) 0.03 
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  14. Dodson, C.: CD-ROMs for the library (1987) 0.03 
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  15. Hübscher, C.: ¬Die Methode Eppelsheimer im Online-Katalog (1989) 0.03 
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  16. Hildreth, C.: LCSH needs hierarchical restructuring (1984) 0.03 
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  17. Franklin, C.: Hypertext defined and applied (1989) 0.03 
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  18. Schwarz, C.: Natural language and information retrieval : Kommentierte Literaturliste zu Systemen, Verfahren und Tools (1986) 0.03 
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    Informationsliguistische Texterschließung. Hrsg.: C. Schwarz u. G. Thurmair
  19. Garfield, E.: Citation indexes for science (1985) 0.03 
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    Abstract
    Indexes in general seek to provide a "key" to a body of literature intending to help the user in identifying, verifying, and/or locating individual or related items. The most common devices for collocation in indexes are authors' names and subjects. A different approach to collocating related items in an index is provided by a method called "citation indexing." Citation indexes attempt to link items through citations or references, in other works, by bringing together items cited in a particular work and the works citing a particular item. Citation indexing is based an the concept that there is a significant intellectual link between a document and each bibliographic item cited in it and that this link is useful to the scholar because an author's references to earlier writings identify relevant information to the subject of his current work. One of the major differences between the citation index and the traditional subject index is that the former, while listing current literature, also provides a retrospec tive view of past literature. While each issue of a traditional index is normally concerned only with the current literature, the citation index brings back retrospective literature in the form of cited references, thereby linking current scholarly works with earlier works. The advantages of the citation index have been considered to be its value as a tool for tracing the history of ideas or discoveries, for associating ideas between current and past work, and for evaluating works of individual authors or library collections. The concept of citation indexing is not new. It has been applied to legal literature since 1873 in a legal reference tool called Shepard's Citations. In the 1950s Eugene Garfield, a documentation consultant and founder and President of the Institute for Scientific Information (Philadelphia), developed the technique of citation indexing for scientific literature. This new application was facilitated by the availability of computer technology, resulting in a series of services: Science Citation Index (1955- ), Social Sciences Citation Index (1966- ), and the Arts & Humanities Index (1976- ). All three appear in printed versions and as machine-readable databases. In the following essay, the first in a series of articles and books elucidating the citation indexing system, Garfield traces the origin and beginning of this idea, its advantages, and the methods of preparing such indexes.
  20. Gehirn und Nervensystem : woraus sie bestehen - wie sie funktionieren - was sie leisten (1988) 0.03 
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    Date
    22. 7.2000 18:22:27

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