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  • 1
    Electronic Resource
    Electronic Resource
    Evidence for spontaneous neuro-melanophore activity inPseudopleuronectes americanus (teleostei; pleuronectiformes) during total darkness (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 40-42 
    Details
    ISSN: 1420-9071
    Keywords: Melanophores ; integumentary nerve plexus ; phentolamine ; spontaneous neural activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In total darkness, melanophores of much of the integumentary pattern ofPseudopleuronectes americanus display intermediate melanosome distribution, whilst theα-adrenoceptor antagonist phentolamine evokes their complete dispersion. The intermediate condition is not attained in total darkness in locally decentralized melanophores. It is proposed that, in the absence of photic stimulation, spontaneous neural activity sustains a partial melanosome aggregation in this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041247
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of in vitro sodium and potassium ion ratio on teleost melanosome intracellular motility (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 1105-1108 
    Details
    ISSN: 1420-9071
    Keywords: Melanophores ; integumentary nerve plexus ; sodium ions ; potassium ions ; neurotransmitter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The miniature neuroeffector system represented by the melanophore and neural elements of winter flounder (Pseudopleuronectes americanus) scale slips demonstrates asymmetrical sensitivity to progressive in vitro changes in the relative concentrations of Na+ and K+ ions induce melanosome aggregation more readily than Na+ ions evoke melanosome dispersion, reflecting the influence of K+ induced depolarization on neurotransmitter release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950170
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  • 3
    Electronic Resource
    Electronic Resource
    On the use of an inverse shortest paths algorithm for recovering linearly correlated costs (1994)
    Springer
    Mathematical programming 63 (1994), S. 1-22 
    Details
    ISSN: 1436-4646
    Keywords: Graph theory ; shortest paths ; inverse problems ; quadratic programming ; traffic modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract This paper considers the inverse shortest paths problem where arc costs are subject to correlation constraints. The motivation for this research arises from applications in traffic modelling and seismic tomography. A new method is proposed for solving this class of problems. It is constructed as a generalization of the algorithm presented in Burton and Toint (Mathematical Programming 53, 1992) for uncorrelated inverse shortest paths. Preliminary numerical experience with the new method is presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01582056
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  • 4
    Electronic Resource
    Electronic Resource
    On an instance of the inverse shortest paths problem (1992)
    Springer
    Mathematical programming 53 (1992), S. 45-61 
    Details
    ISSN: 1436-4646
    Keywords: Graph theory ; shortest paths ; inverse problems ; quadratic programming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The inverse shortest paths problem in a graph is considered, that is, the problem of recovering the arc costs given some information about the shortest paths in the graph. The problem is first motivated by some practical examples arising from applications. An algorithm based on the Goldfarb-Idnani method for convex quadratic programming is then proposed and analyzed for one of the instances of the problem. Preliminary numerical results are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01585693
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