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  • 1
    Electronic Resource
    Electronic Resource
    Neurotoxicity of an MPTP Analogue, 2/CH3-MPTP, on Monoaminergic Systems in the Mouse Brain (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 648 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb24557.x
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  • 2
    Electronic Resource
    Electronic Resource
    Resonance Raman and infrared spectra of [CH"3C"5H"4NiPh"2PC"3H"6PPh"2].B"1"1H"1"4
    Amsterdam : Elsevier
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Section 48 (1992), S. 1035-1039 
    Details
    ISSN: 0584-8539
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0584-8539(92)80184-X
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  • 3
    Electronic Resource
    Electronic Resource
    Two-dimensional self-focusing of short intense laser pulse in underdense plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1336-1348 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simplified set of three-dimensional equations are derived for the propagation of an intense laser pulse of arbitrary strength a=eA/mc2 (where A is the magnetic vector potential of the laser pulse) in cold underdense plasma. In different limits, the equations can be easily reduced to those of previous one-dimensional models [Phys. Fluids 30, 526 (1987); Phys. Rev. A 40, 3230 (1989); 41, 4463 (1990)]. For ||a||≤1, an approximate set of equations from the averaged Lagrangian is obtained. The present study differs from previous work in that wave dispersion is also important for short laser pulse, and is included in the model equations. The axisymmetric two-dimensional model equations are solved numerically to show the effect of dispersion in the self-focusing process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860923
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  • 4
    Electronic Resource
    Electronic Resource
    Resistive tearing mode instability with shear flow and viscosity (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 1364-1373 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The linear theory of the resistive tearing mode instability in slab geometry, has been recently extended by introducing the effect of equilibrium shear flow and viscosity [Phys. Fluids 29, 2563 (1986); Phys. Fluids B 1, 2224 (1989); ibid. 2, 495 (1990); ibid. 2, 2575 (1990)]. In the present analysis, numerical solutions of the time-dependent resistive equations are generalized to this problem and growth rate scaling is obtained. The results of the computations are compared to previous work, and the computed growth rate scalings agree with analytical predictions. Namely, the "constant-ψ'' growth rate scales as S−1/2 and the "nonconstant-ψ'' growth rate scales as S−1/3, where S is the magnetic Reynolds number. The Furth–Killeen–Rosenbluth (FKR) scaling of S−3/5 is reproduced for small values of shear flow. The presence of flow introduces a new peak in the eigenfunction, which is outside of the peak that occurs in the case without flow. The introduction of viscosity and small shear alters the growth rate scaling to S−2/3(Sv/S)1/6 where Sv is the ratio of the viscous time to the Alfvén time. When the shear flow is large, the growth rate behaves in a more complex way, and Kelvin–Helmholtz instability effects are present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859701
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  • 5
    Electronic Resource
    Electronic Resource
    A sufficient condition for the ideal instability of shear flow with parallel magnetic field (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 863-865 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simple sufficient condition is given for the linear ideal instability of plane parallel equilibria with antisymmetric shear flow and symmetric or antisymmetric magnetic field. Application of this condition shows that plane Couette flow, which is stable in the absence of a magnetic field, can be driven unstable by a symmetric magnetic field. Also, although strong magnetic shear can stabilize shear flow with a hyperbolic tangent profile, there exists a range of magnetic shear that causes destabilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859841
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of viscosity on the resistive tearing mode with the presence of shear flow (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 2575-2580 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of small viscosity on the "constant ψ'' tearing mode in the presence of shear flow is analyzed using the boundary-layer approach. It is found that the influence of viscosity depends upon the parameter G'(0)/F'(0), where G'(0) and F'(0) denote the flow shear and magnetic field shear at the magnetic null plane, respectively. When ||G'(0)/F'(0)||(very-much-less-than)1, the tearing mode growth rate is suppressed by the viscosity, but not completely stabilized. When ||G'(0)/F'(0)||∼O(1) and the viscosity is comparable to the resistivity, the growth rate vanishes as [1−G'(0)2/F'(0)2]1/3, when G'(0)2→F'(0)2 from below. In the case where 1−[G'(0)2/F'(0)2]〈0 matching cannot be achieved and the tearing mode vanishes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859382
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  • 7
    Electronic Resource
    Electronic Resource
    Nonlinear interactions of tearing modes in the presence of shear flow (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 845-854 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The interaction of two near-marginal tearing modes in the presence of shear flow is studied. To find the time asymptotic states, the resistive magnetohydrodynamic (MHD) equations are reduced to four amplitude equations, using center manifold reduction. These amplitude equations are subject to the constraints due to the symmetries of the physical problem. For the case without flow, the model that is adopted has translation and reflection symmetries. Presence of flow breaks the reflection symmetry, while the translation symmetry is preserved, and hence flow allows the coefficients of the amplitude equations to be complex. Bifurcation analysis is employed to find various possible time asymptotic states. In particular, the oscillating magnetic island states discovered numerically by Persson and Bondeson [Phys. Fluids 29, 2997 (1986)] are discussed. It is found that the flow-introduced parameters (imaginary part of the coefficients) play an important role in driving these oscillating islands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860238
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  • 8
    Electronic Resource
    Electronic Resource
    Resistive tearing instability with equilibrium shear flow (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 495-507 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of equilibrium velocity shear on the resistive tearing instability has been systematically studied, using the boundary layer approach. Both the "constant-ψ'' tearing mode, which has a growth rate that scales as S−3/5, and the "nonconstant-ψ'' tearing mode [Δ'(αS)−1/3(very-much-greater-than)1], which has a growth rate that scales as S−1/3, are analyzed in the presence of flow. Here S is the usual ratio of the resistive diffusion and Alfvén times. It is found that the shear flow has a significant influence on both the external ideal region and the internal resistive region. In the external ideal region, the shear flow can dramatically change the value of the matching quantity Δ'. In the internal resistive region, the tearing mode is sensitive to the flow shear at the magnetic null plane: G'(0). When G'(0) is comparable to the magnetic field shear, F'(0), the scalings of the constant-ψ tearing mode are changed and the Δ'〉0 instability criterion is removed, provided G'(0)G‘(0)−F'(0)F‘(0)≠0. The scalings of the nonconstant-ψ tearing mode remain unchanged. When the flow shear is larger than the magnetic field shear at the magnetic null plane, both tearing modes are stabilized. Finally, the transition to ideal instability is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859339
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  • 9
    Electronic Resource
    Electronic Resource
    Structural transformations of Bi2CuO4 induced by mechanical deformation (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 3155-3158 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structural transformation of α-Bi2CuO4 (a=8.4996 Å, c=5.8172 Å, space group P4/ncc) during ball milling was investigated by powder x-ray diffraction and thermal analysis. It is shown that α-Bi2CuO4 first transforms into an amorphous phase; and then transforms into a new phase (designated by β-Bi2CuO4) with milling time. The new phase appears to be isostructural to (La,Sr)2CuO4 and has a tetragonal cell with cell parameters a=3.869 and c=13.83 Å. It is a metastable phase which can transform back into α-Bi2CuO4 at 650 °C. No superconductivity was observed above 5 K for both as-milled samples and oxygen-annealed β-Bi2CuO4. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369692
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  • 10
    Electronic Resource
    Electronic Resource
    Growth and optical characterization of Ga2O3 nanobelts and nanosheets (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 92 (2002), S. 1062-1064 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Monoclinic Ga2O3 nanobelts and nanosheets are obtained by a simple chemical route involved with H2O at 950 °C in Ar atmosphere. Electron microscopy observations reveal that the as-synthesized Ga2O3 nanobelts and nanosheets are structurally uniform, single crystalline, and most of them are free of defects and dislocations. The nanobelts are growing along with [001] facets, and the nanosheets are stacked up by (011) facets. The Raman scattering spectrum of Ga2O3 nanostructures shows a 30 cm−1 redshift at high wave numbers in comparison with that of bulk Ga2O3 powder. The photoluminescence spectrum reveals that there exists a stable blue emission band centered at 460 nm, which is mainly attributed to the oxygen vacancies in the Ga2O3 nanostructures. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1483915
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