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  • 1
    Electronic Resource
    Electronic Resource
    Stabilization and regularization for solutions of an ill posed problem for the wave equation (1985)
    Chichester, West Sussex : Wiley-Blackwell
    Mathematical Methods in the Applied Sciences 7 (1985), S. 202-209 
    Details
    ISSN: 0170-4214
    Keywords: Mathematics and Statistics ; Applied Mathematics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: In this paper we study the problem of finding u: [O, T] → D(A), D(A) ⊆ H, H a Hibert space such that:Is a linear positive, self-adjoint operator with a compact inverse. The problem is well known to be illposed because uniqueness and existence generally fail. We restore the stability with an a priori bound on ∥ du(0)/dt ∥ for some particular values of T.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mma.1670070112
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A potential well theory for the heat equation with a nonlinear boundary condition (1987)
    Chichester, West Sussex : Wiley-Blackwell
    Mathematical Methods in the Applied Sciences 9 (1987), S. 127-136 
    Details
    ISSN: 0170-4214
    Keywords: Mathematics and Statistics ; Applied Mathematics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: The present paper employs potential well arguments of a previous work by the authors [6] to obtain a sharp existence-nonexistence alternative for solutions to the linear heat equation subject to a non-linear boundary condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mma.1670090111
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  • 3
    Electronic Resource
    Electronic Resource
    Some remarks on Saint-Venant's principle (1989)
    Chichester, West Sussex : Wiley-Blackwell
    Mathematical Methods in the Applied Sciences 11 (1989), S. 71-77 
    Details
    ISSN: 0170-4214
    Keywords: Mathematics and Statistics ; Applied Mathematics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: We consider a three-dimensional hyperelastic cylinder in Ω = D × [0, ∞]. We study the asymptotic behaviour of the deformations of the cross-sections in an equilibrium state. In this case we show that the solutions either have exponential decay or exponential growth. We give some initial conditions such that the latter case occurs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mma.1670110105
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  • 4
    Electronic Resource
    Electronic Resource
    Unrestricted lower bounds for eigenvalues for classes of elliptic equations and systems of equations with applications to problems in elasticity (1985)
    Chichester, West Sussex : Wiley-Blackwell
    Mathematical Methods in the Applied Sciences 7 (1985), S. 210-222 
    Details
    ISSN: 0170-4214
    Keywords: Mathematics and Statistics ; Applied Mathematics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: Lower bounds for the eigenvalues of some elliptic equations and elliptic systems over bounded regions are obtained. The bounds are universal in that they depend only upon the volume of the region. Specific applications include the clamped plate, the buckling problem for the clamped plate and the equations of linear elasticity.Our results are consequences of extensions of the methods of Li and Yau (Comm. Mat. Phys. 88 (1983) 309-318) who obtained such results for the eigenvalues of the fixed membrane problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mma.1670070113
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  • 5
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    Inescapable versus escapable shock modulates long-term potentiation in the rat hippocampus (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-04-14
    Description: A group of rats was trained to escape low-intensity shock in a shuttle-box test, while another group of yoked controls could not escape but was exposed to the same amount and regime of shock. After 1 week of training, long-term potentiation (LTP) was measured in vitro in hippocampal slices. Exposure to uncontrollable shock massively impaired LTP relative to exposure to the same amount and regime of controllable shock. These results provide evidence that controllability modulates plasticity at the cellular-neuronal level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shors, T J -- Seib, T B -- Levine, S -- Thompson, R F -- HD02881/HD/NICHD NIH HHS/ -- MH11936/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1989 Apr 14;244(4901):224-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, University of Southern California, Los Angeles 90089.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2704997" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning ; Corticosterone/blood ; *Electroshock ; *Escape Reaction ; Hippocampus/*physiology ; Learning/physiology ; Male ; Memory/physiology ; *Neuronal Plasticity ; Rats ; Stress, Psychological/physiopathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Evidence for exposure to HTLV-III in Uganda before 1973 (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-03-01
    Description: Fifty of 75 serum samples collected in the West Nile district of Uganda between August 1972 and July 1973 contained antibodies reactive with human T-cell leukemia (lymphotropic) virus type 3 (HTLV-III; mean titer, 601), while 12 of 75 samples were positive in a similar test for HTLV type 1 (HTLV-1) antibodies (mean titer, 236). The samples were screened by enzyme-linked immunosorbent assay and positive results were confirmed by a newly developed unlabeled antibody-peroxidase procedure with enhanced sensitivity for detection of antibody binding to immunoblots of HTLV-III antigen, demonstrating antibodies to proteins with molecular weights of 24,000, 41,000, and 76,000 in nearly all positive samples. Analysis of titration data indicated enhanced titers of antibody against HTLV-III and HTLV-I when coinfection occurred. The high prevalence and relatively low titers [compared to serum from patients with acquired immune deficiency syndrome (AIDS)] of antibodies recognizing HTLV-III proteins in sera from this population at a time that may predate or coincide with the appearance or spread of the AIDS agent (HTLV-III) suggest that the virus detected may have been a predecessor of HTLV-III or is HTLV-III itself but existing in a population acclimated to its presence. It further suggests an African origin of HTLV-III.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saxinger, W C -- Levine, P H -- Dean, A G -- de The, G -- Lange-Wantzin, G -- Moghissi, J -- Laurent, F -- Hoh, M -- Sarngadharan, M G -- Gallo, R C -- New York, N.Y. -- Science. 1985 Mar 1;227(4690):1036-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2983417" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/immunology/microbiology ; Antibodies, Viral/immunology ; Antigens, Viral/immunology ; Burkitt Lymphoma/immunology/microbiology ; Child ; Deltaretrovirus/immunology ; Enzyme-Linked Immunosorbent Assay ; Female ; Humans ; Male ; Retroviridae Infections/*epidemiology/immunology/microbiology ; Uganda
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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