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  • Admissible controls  (1)
  • Flicker ERG  (1)
  • Noradrenaline  (1)
  • infinite-dimensional systems  (1)
  • 1985-1989  (4)
Publikationsart
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 1985-1989  (4)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    The influence of ovarian hormones on the rat oviductal and uterine concentration of noradrenaline and 5-hydroxytryptamine (1989)
    Springer
    Neurochemical research 14 (1989), S. 821-827 
    Details
    ISSN: 1573-6903
    Schlagwort(e): Noradrenaline ; 5-hydroxytryptamine ; oviduct ; uterus ; ovariectomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract This paper describes the effects of estradiol and progesterone on the concenirations of noradrenaline and 5-hydroxytryptamine in the Wistar rat oviduct and uterus. The levels of noradrenaline and 5-hydroxytryptamine are higher in the oviduct than in the uterus whereas p-tyrosine and tryptophan are similar in both tissues. Estradiol treatment reduced the oviductal concentration of noradrenaline but not 5-hydroxytryptamine in oviduct, while the concentrations of both noradrenaline and 5-hydroxytryptamine were reduced in uterine horn. The levels of noradrenaline in the oviduct and uterus in rats in estrus were lower than those of diestrous rats. Bilateral ovariectomy produced an increase in uterine noradrenaline and 5-hydroxytryptamine levels. These changes were reversed in the presence of ovarian hormones as indicated by experiments where unilateral ovariectomy was performed. Reserpine administration reduced noradrenaline concentration in both the oviduct and the uterus but did not change oviductal or uterine 5-hydroxytryptamine. These results indicate the existence of noradrenaline within postganglionic sympathetic nerve terminals and suggest that estrogens increase the utilization and the synthesis of noradrenaline in both the oviducts and the uterine horns. With respect to 5-hydroxytryptamine the data support the concept that it is mainly associated with mast cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00964810
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Flicker ERG ; flicker VECP ; maculopathy ; media opacities ; optic atrophy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00153017
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): Admissible controls ; control domains ; functional differential systems ; maximum principle ; optimal periodic control
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00938629
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    N-person differential games governed by infinite-dimensional systems (1986)
    Springer
    Journal of optimization theory and applications 50 (1986), S. 431-450 
    Details
    ISSN: 1573-2878
    Schlagwort(e): Equilibrium strategies ; infinite-dimensional systems ; N-person differential games ; minimax principle ; linear-quadraticN-person differential games
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract This paper discussesN-person differential games governed by infinite-dimensional systems. The minimax principle, which is a necessary condition for the existence of open-loop equilibrium strategies, is proved. For linear-quadraticN-person differential games, global necessary and sufficient conditions for the existence of open-loop and closed-loop equilibrium strategies are derived.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00938630
    Standort Signatur Einschränkungen Verfügbarkeit
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    Artikel (Nationallizenzen)
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