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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Heat and mass transfer 14 (1980), S. 7-13 
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung In dieser Arbeit wird die allgemeine Lösung der zweidimensionalen Wärmeleitungsgleichung für zwei konzentrische Kreisbereiche mit unterschiedlichen Materialeigenschaften angegeben. Diese ist als quellenmäßige Darstellung gegeben, d.h. als Integral über die Wärmequellen im Inneren und am Rand und über die Anfangsverteilung, wobei alle mit der zugehörigen Greenschen Funktion multipliziert werden. Die angegebene Greensche Funktion gilt für alle beliebigen (linearen) Randbedingungen vom Sturm-Liouvilleschen Typ mit konstanten Koeffizienten. Es werden für quellenfreie Probleme mit homogener Anfangstemperatur und konstanter Außentemperatur Beispiele berechnet. Numerische Berechnungen zeigen die zeitliche Entwicklung der Temperaturverteilung für Zweischichtenanordnungen, welche von außen erwärmt werden, und für einen isolierten elektrischen Leiter, welcher nach einer Erhitzung durch Kurzschluß von außen gekühlt wird.
    Notes: Abstract The general solution of the two-dimensional heat equation is given for two concentric domains consisting of different materials; it is represented as integrals over the given source and boundary distribution multiplied by a Green's function. The Green's function in this problem is given for any (linear) boundary condition of Sturm-Liouville type with constant coefficients. Examples are evaluated for source free problems with uniform initial temperature distribution and a boundary condition which corresponds to constant external temperature. Numeric evaluations show the development of the temperature distribution with time in compounds heated from outside and also for an isolated electric conductor which is cooled from outside after it has been heated by a short circuit.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 334 (1993), S. 409-419 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 323 (1992), S. 338-344 
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 283 (1989), S. 723-729 
    ISSN: 0168-9002
    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
    The European physical journal 6 (1987), S. 327-335 
    ISSN: 1434-6079
    Keywords: 32.60.S ; 32.20.J ; 31.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A method to calculate the Stark shifts and splittings in noble gases is described and results for neon I are presented. The energy values in a static homogeneous electric field are found by diagonalizing the energy matrix numerically. This matrix consists of the energy values of the free atom taken from experiment and of off-diagonal matrix elements of the electric field operator. The latter are computed using wave functions consisting of a radial function of the excited electron found by numerical integration, and of a two-particle (core+electron) spin-orbital part represented by rigorousjl coupling. As an example, the splitting of the levels 6s to 6p is shown and is explained in terms of atomic level positions, the relative size of matrix elements and of selection rules. A nomenclature for the high field Stark effect is developed in accord with group theory.
    Type of Medium: Electronic Resource
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