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  • 1
    Electronic Resource
    Electronic Resource
    Evaluation of the central retina and optic nerve function in media opacities (1986)
    Springer
    Documenta ophthalmologica 63 (1986), S. 101-106 
    Details
    ISSN: 1573-2622
    Keywords: Flicker ERG ; flicker VECP ; maculopathy ; media opacities ; optic atrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Conventional electroretinogram (ERG) and pattern VECP (or visual evoked cortical potential) are of limited value in estimating visual function in eyes with media opacities. We used a method consisting of flicker ERG and flicker VECP to successfully overcome this limitation. Three of 25 eyes with cataract had a reduced flicker VECP. These 3 patients also had a history of glaucomatous optic nerve damage. Normal flicker VECP was found in some patients with reduced flicker ERG or reduced scotopic and photopic a-wave. Analysis of the results showed that the flicker VECP is independent of the ERG and flicker ERG. Utilizing this method we could rule out maculopathy and optic nerve damage in patients with media opacities as well as recognize optic nerve damage in patients with coexisting maculopathy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00153017
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Maximum principle of optimal control for functional differential systems (1987)
    Springer
    Journal of optimization theory and applications 54 (1987), S. 335-360 
    Details
    ISSN: 1573-2878
    Keywords: Functional differential equations ; maximum principle ; optimal periodic control ; linear optimal control ; relaxed linear optimal control ; value functional ; finite codimension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We show that the maximum principle holds for optimal periodic control problems governed by functional differential equations under a Lipschitz condition on the value functional. Generalizations to other boundary conditions are also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939438
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Maximum principle of optimal periodic control for functional differential systems (1986)
    Springer
    Journal of optimization theory and applications 50 (1986), S. 421-429 
    Details
    ISSN: 1573-2878
    Keywords: Admissible controls ; control domains ; functional differential systems ; maximum principle ; optimal periodic control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper discusses the optimal periodic control problem to minimize the cost function $$J(u) = \int_0^1 {g(t,x(t),u(t))dt} $$ subject to the functional differential system $$dx(t)/dt = f(t,x_t ,u(t)),x_1 = x_0 $$ andu(·) εU ad. The maximum principle as a necessary condition of optimal control is proved under the assumption that Eq. (4) and its adjoint equation (5) both have no nontrivial periodic solution with period of 1. In this paper, the control domainU is an arbitrary set inR m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938629
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    Paper (German National Licenses)
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