201 research outputs found

    Coupling to the fast wave at lower hybrid frequencies

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    Nonlinear coupling and propagation of lower hybrid waves

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    Friedrich Rosen

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    Diplomat, Orientalist, and German foreign minister: Friedrich Rosen (1856-1935) was an Orient expert par excellence in the age of German imperialism. His story is told here for the first time. Following his rise to the centres of international politics and Orientalist scholarship, this study argues that power and knowledge sustained, challenged and subverted each other

    Three-dimensional theory of waveguide-plasma coupling

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    Linear theory of coupling EM power from waveguide arrays to a plasma in a magnetic field

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    Von Persophonie zum Arier-Mythos : orientalistische ZugÀnge zu einem globalgeschichtlichen PhÀnomen

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    Zwischen dem 19. und der ersten HĂ€lfte des 20. Jahrhunderts zerfiel in Asien und in Teilen Asiens und Europa unter dem Druck des europĂ€ischen Imperialismus und im Zuge des aufkommenden Nationalismus die Persophonie. Gleichzeitig verbreitete sich im gleichen Gebiet und darĂŒber hinaus der Arier-Mythos. Der Aufsatz verfolgt diesen Übergang entlang der Wissensproduktionen von europĂ€ischen Orientalisten und anderen Gelehrten, die diese Entwicklung maßgeblich mitprĂ€gten, und bietet einen Überblick der verschieden Fortentwicklungen des Arier-Mythos nach dem Holocaust zwischen Indien, dem Iran, Zentralasien und Europa, und wie diese auch in der heutigen global verflochtenen Welt ihre Strahlkraft in verschiedenen AusprĂ€gungen beibehalten haben

    Nonlinear coupling to lower hybrid waves in a tokamak plasma

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    Nonlinear coupling of lower hybrid waves at the edge of tokamak plasmas

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    Efficient method for simulating quantum electron dynamics under the time dependent Kohn-Sham equation

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    A numerical scheme for solving the time-evolution of wave functions under the time dependent Kohn-Sham equation has been developed. Since the effective Hamiltonian depends on the wave functions, the wave functions and the effective Hamiltonian should evolve consistently with each other. For this purpose, a self-consistent loop is required at every time-step for solving the time-evolution numerically, which is computationally expensive. However, in this paper, we develop a different approach expressing a formal solution of the TD-KS equation, and prove that it is possible to solve the TD-KS equation efficiently and accurately by means of a simple numerical scheme without the use of any self-consistent loops.Comment: 5 pages, 3 figures. Physical Review E, 2002, in pres
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