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  • Bochvar Logic  (1)
  • Cell & Developmental Biology  (1)
  • Knowledge acquisition  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Studia logica 56 (1996), S. 225-261 
    ISSN: 1572-8730
    Keywords: Priestley duality ; Stone duality ; Pontryagin duality ; character group ; program semantics ; Bochvar Logic ; regular identities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Philosophy
    Notes: Abstract The paper discusses “regularisation” of dualities. A given duality between (concrete) categories, e.g. a variety of algebras and a category of representation spaces, is lifted to a duality between the respective categories of semilattice representations in the category of algebras and the category of spaces. In particular, this gives duality for the regularisation of an irregular variety that has a duality. If the type of the variety includes constants, then the regularisation depends critically on the location or absence of constants within the defining identities. The role of schizophrenic objects is discussed, and a number of applications are given. Among these applications are different forms of regularisation of Priestley, Stone and Pontryagin dualities.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neural computing & applications 4 (1996), S. 27-34 
    ISSN: 1433-3058
    Keywords: Fuzzy logic ; Genetic algorithms ; Knowledge acquisition ; Learning ; Neural networks ; Optimisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract This paper presents an automated knowledge acquisition architecture for the truck docking problem. The architecture consists of a neural network block, a fuzzy rule generation block and a genetic optimisation block. The neural network block is used to quickly and adaptively learn from trials the driving knowledge. The fuzzy rule generation block then extracts the driving knowledge to form a knowledge rule base. The driving knowledge rule base is further optimised in the genetic optimisation block using a genetic algorithm. Computer simulations are presented to show the effectiveness of the architecture.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0148-7280
    Keywords: spermatozoa ; intracellular Na+ and K+ ; monovalent ionophores ; acrosome reaction ; guinea pig ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Guinea pig spermatozoa were collected from the caudae epididymides in various isotonic solutions and the intracellular sodium and potassium content was determined by atomic absorption spectroscopy. The sperm intracellular Na and K content was found to be influenced by large variations in the extracellular concentrations of these ions. Treatment of spermatozoa suspended in a saline-based solution with the monovalent ionophores monensin or nigericin caused an approximate 2-fold increase in the intracellular Na content and a 3-6 fold decrease in the intracellular K content. Incubation of the spermatozoa in a K+-free minimal culture medium (MCM-PL) at a pH of 7.6 or 8.3 for 2 hr caused an approximate 2-fold increase in the sperm intracellular Na content and a 5-fold decrease in the intracellular K content. The motile spermatozoa incubated for 2 hr at pH 7.6 showed less than 5% acrosome reactions, compared with 30-40% acrosome reactions after incubation at pH 8.3, in response to the addition of 5 mM Ca2+. Changes in the sperm intracellular elemental composition during culture in vitro, which may lead to an acrosome reaction, are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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