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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 2175-2177 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The resonant nuclear reactions, 27Al( p,α) and 27Al( p,γ), were used to determine the Al distribution in GaAlAs samples. By varying the incident proton energy, the Al concentrations at different depths were measured. The results agree with concentrations measured with other methods. The present techniques serve as nondestructive, accurate methods of profiling Al in various materials.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 130 (1994), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary The prevalence and clinical characteristics of polymorphic light eruption were assessed by a questionnaire survey of 172, 196 and 182 subjects in Perth, Ballarat and London, respectively. The prevalence was 5·2% in Perth (latitude 32°), 3·6% in Ballarat (37·5°) and 14·8% in London (51·5°). The age distribution (mostly first three decades) and male: female ratio (1:3) was similar for affected individuals in all three areas. Development of tolerance during the summer was more common in Perth (66·7%) and Ballarat (71·4%) than in London (40·7%).
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 194-196 (1994), S. 1073-1074 
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of mathematical biology 40 (1978), S. 107-121 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The purpose of this paper is to present a method for the determination of a solution for a coupled system of first order initial boundary-value problems arising from some biological systems. The physical problem is to determine the suspended and the superficial molecular concentrations of a traced substance passing through an organ containing a tangle of vessels, such as the kidney-ureter system. The approach to the problem is by successive approximation which leads to a recursion formula for the determination of the solution as well as error estimates for the approximations. The recursion formula involves only direct integration which indicates a promising possibility in obtaining numerical results by using a computer. In addition to the determination of a solution, some qualitative analysis of the solution is given. This includes the existence of a unique solution, the continuous dependency of the solution on the data, and the stability problem of a steady-state solution.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Mathematik 83 (1977), S. 201-205 
    ISSN: 1436-5081
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This note is concerned with the existence of a weak solution for a degenerate Cauchy problem of parabolic type in then-dimensional spaceR n. The degenerate property is in the sense that the matrix (a ij(t,x)) involved in the differential operator is not necessarily positive definite. The essential idea is the construction of a suitable function spaceH and to prove the existence of a weak solution inH.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 26 (1975), S. 453-461 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Gegenstand der Arbeit ist eine nichtlineare Diffusionsgleichung, welche in der Theorie des Bevölkerungswachstums wie auch in der klassischen Theorie der Diffusion und der Wärmeleitung eine Rolle spielt. Das räumliche Gebiet kann beschränkt oder unbeschränkt sein, und es werden Randbedingungen sowohl vom Dirichletschen wie vom Neumannschen Typus zugelassen. Unter physikalisch sinnvollen Annahmen über die Nichtlinearität der Gleichung wird die Existenz einer eindeutigen positiven und beschränkten Lösung bewiesen, welche mit der Methode der sukzessiven Approximationen konstruiert werden kann. Für gewisse einfache Modellfälle wird eine Rekursionsformel zur Berechnung der Approximationen angegeben. Neben dem Existenzproblem wird auch das asymptotische Verhalten der Lösung sowie die Stabilität der stationären Lösung betrachtet.
    Notes: Summary This paper treats some non-linear diffusion system arising from the population growth as well as the classical diffusion and heat conduction problem. The spatial domain in the diffusion system can be either bounded or unbounded and the boundary condition under consideration includes both Dirichlet and Neumann type conditions. It is shown under some physically reasonable conditions on the non-linear function that the initial boundary value problem has a unique bounded positive solution which can be constructed by the method of successive approximation. In some simple models, a recursion formula for the calculation of the approximation is given. In addition to the existence problem the investigation is devoted to the asymptotic behavior of the solution and the stability of a steady-state solution. Particular attention is given to a model in the population growth and the chemical diffusion system.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archive for rational mechanics and analysis 50 (1973), S. 290-302 
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract The aim of this paper is to give a constructive method for the solution of the Boltzmann equation for neutron transport in a bounded space domain subject to typical boundary and initial conditions. Sufficient conditions are given to insure the existence of a unique solution. The method entails the use of a semiinner product in a Banach space together with successive approximations, and leads to a recursion formula for the calculation of approximate solutions and error estimates. The linearized Boltzmann equation for neutron transport is included as a special case.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archive for rational mechanics and analysis 35 (1969), S. 16-29 
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archive for rational mechanics and analysis 35 (1969), S. 30-46 
    ISSN: 1432-0673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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