Modulation of drift-wave envelopes in a nonuniform quantum magnetoplasma
نویسندگان
چکیده
منابع مشابه
Drift wave vortices in nonuniform plasmas with sheared magnetic fields
Nonlinear coherent structures governed by the coupled drift wav&on-acoustic mode equations in nonuniform plasmas with sheared magnetic fields are studied analytically and numerically. A solitary vortex equation that includes the effects of density and temperature gradients and magnetic shear is derived and analyzed, The analytic and numerical studies show that for a plasma in a sheared magnetic...
متن کاملNonuniform muscle fiber orientation causes spiral wave drift in a finite element model of cardiac action potential propagation.
INTRODUCTION Reentrant tachyarrhythmias are thought to involve spiral waves of excitation and recovery that may be nonstationary. The effect of muscle fiber curvature on spiral and planar wave propagation was studied using a computational model. METHODS AND RESULTS Two-dimensional anisotropic cardiac propagation was modeled using a finite element method to solve a modification of the FitzHugh...
متن کاملDust-lower-hybrid drift instabilities with dust charge fluctuations in an inhomogeneous dusty magnetoplasma.
Effects of a uniform magnetic field, the plasma inhomogeneity, and dust charge fluctuations on low-frequency dust-lower-hybrid drift waves have been investigated. Charging currents of electrons and ions to a spherical dust grain in a nonuniform magnetized dusty plasma have been calculated to study the charge fluctuation induced damping or growth of low-frequency drift waves. It is found that fo...
متن کاملWave-number spectrum of drift-wave turbulence.
A simple model for the evolution of turbulence fluctuation spectra, which includes neighboring interactions leading to the usual dual cascade as well as disparate scale interactions corresponding to refraction by large scale structures, is derived. The model recovers the usual Kraichnan-Kolmogorov picture in the case of exclusively local interactions and midrange drive. On the other hand, when ...
متن کاملTemporal Envelopes in Sine-Wave Speech Recognition
There is a long debate on the relative importance of spectral and temporal cues in speech perception theories. On the one hand, the highly-intelligible sine-wave speech (SWS) has been viewed as a representation of the global spectral structure of the speech signal. On the other hand, there is accumulating evidence showing that the temporal aspects of speech without spectral details provide suff...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2014
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.4871493