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  • 1
    Electronic Resource
    Electronic Resource
    A note on solitary waves along potential vorticity fronts on anf-plane (1993)
    Springer
    Journal of oceanography 49 (1993), S. 477-489 
    Details
    ISSN: 1573-868X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The effects of short waves on the propagration of velocity discontinuity along the interface of two uniform potential vorticity, zones on anf-plane is examined. It is shown, using a multiple scale analysis, that the dispersion introduced by the short waves can balance the nonlinear steepening effects predicted by the semigeostrophic theory. The time evolution of a shear disturbance along the front is governed by a Korteweg-de Vries equation. Numerical solutions of the solitary waves along the front are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02237456
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    Paper (German National Licenses)
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  • 2
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    Preparation and magnetic properties of CoWO4 nanocrystals (2012)
    Wiley-Blackwell
    Details
    Publication Date: 2012-07-05
    Description: Cobalt tungstate (CoWO 4 ) nanocrystals with an average size of 20–50 nm were synthesized via a template- or surfactant-free hydrothermal route. The crystal structure and morphology of the as-synthesized CoWO 4 sample were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Magnetic measurements on the as-synthesized CoWO 4 nanocrystals indicate a Néel temperature ( T N ) of ∼40 K. This lower T N may be a result of the nanostructured particles that reduce the exchange coupling. The new synthetic route presented in this paper has potential applications to fabricate other metal tungstates (MWO 4 ) materials.
    Print ISSN: 0232-1300
    Electronic ISSN: 1521-4079
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell
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