propagation of low-frequency waves
Low frequency waves in HF heating of the mid-latitude ionosphere
... of low frequency hydromagnetic waves is a main feature of HF heating of the ...these waves are excited under most conditions, ...magnetosonic waves propagating across the magnetic field ...
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Low-frequency waves in HF heating of the ionosphere
... ULF waves generated by modulating the polar elec trojet (PEJ) [Rietveld et ...wave propagation. In general, ICD driven waves have a mini mum at the ground location defined by its intersection with ...
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Temperature anisotropy in the presence of ultra low frequency waves in the terrestrial foreshock
... & Daly 1998) was applied. Essentially, cross correlation be- tween spacecraft provides time of travel information, while the autocorrelation of each signal gives its frequency. An optimiza- tion procedure is ...
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Characterization of the use of low frequency ultrasonic guided waves to detect fouling deposition in pipelines
... Guided Waves for detection of hard-scale fouling in ...UGW propagation at incremental thickness of ...is low and this would be unsuitable for characterizing the fouling thickness due to the required ...
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Low frequency electromagnetic waves and instabilities within the Martian bi ion plasma
... of low-frequency electromagnetic waves (LFEW) in the proton gyrofrequency range are ...these waves results from the relative motion between the solar wind protons and planetary heavy ions, ...
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Low frequency sound propagation in activated carbon
... This was an experimental study. Section II describes surface impedance measurements for Helmholtz resonators incorporating activated carbon. These reveal significant downward shifts in resonant frequencies compared to ...
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Multi channel coupling of decay instability in three dimensional low beta plasma
... Alfvén waves that the oblique-propagation decay instability can compete against the field-aligned decay in the limit of small propagation or decay angles to the mean magnetic field in the ...
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Near field scanning and propagation of correlated low frequency radiated emissions
... In what follows, a NNF transformation of the CF is derived and compared against the measured CF at increasing distances (but small fractions of the wavelength) from a test source. A phase-space representation of the ...
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Research on the Propagation of Extremely Low Frequency Electromagnetic Wave in Shallow Sea Area
... Extremely low frequency (ELF) electromagnetic (EM) wave radiation and propagation underwater has attracted great attention for a long time [1], such as underwater target detection [2, 3], submarine ...
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Single rod impact tests: Analytical, experimental, and modelling investigation
... from low to high strain rates, these include classic tension, compression and torsion tests, drop weight test, SHPB test, Taylor and plate impact tests, ...to low strain rate testing and may pose specific ...
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Buoyancy-driven magnetohydrodynamic waves in a partially ionized plasma
... Brunt–Väisälä frequency may become ...higher-frequency waves in the solar ...Brunt–Väisälä frequency is relatively small, hence we should also consider the case of a large collision ...
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To the Question of Sound Waves Propagation in Liquid
... It is known that the aqueous medium has a very low compressibility, numerically consider it quite difficult. In liquids, [8], the distance between the molecules of the order of molecular dimensions, i.e . ≈ 10 −10 ...
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The Surface Stresses on the Propagation of Elastic Waves
... The propagation of Rayleigh waves in non-homogeneous incompressible medium with an isotropic and homogeneous material boundary is ...The frequency equation of Rayleigh waves in an ...
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Natural Hazards Modeling: From Runoff to Hyperconcentrated Flows – Roll Waves Generation
... roll waves in the ...roll waves from data acquisition of free surface variation in time by light absorption ...Roll waves pattern presented in this article were acquired when a 3 Hz disturbance was ...
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Coronal global EIT waves as tools for multiple diagnostics
... Solar magneto-seismology is one of the newest branches of solar physics that emerged after the direct observational detection of magnetic oscillations in the solar corona (As- chwanden et al. 1999; Nakariakov et al. ...
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Analysis of propagation delays of compressional Pi 2 waves between geosynchronous altitude and low latitudes
... forced waves. Propagating waves observed at two different points should have high correlation when data are shifted by a propagation ...that propagation delays contributed to out-of-phase ...
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Dispersion of low frequency plasma waves upstream of the quasi-perpendicular terrestrial bow shock
... plasma waves between at least two rela- tively close spacecraft which should be less than the coher- ence length and ideally even smaller than the wavelength of the observed ...observed waves then the ...
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Study on the ionogram variation at different solar activity and earthquake occurrence
... Ionospheres vary latitudinal, longitudinally and attitudinally where many atoms are ionized. The ionosphere is also responsible for absorbing the most energetic photons from the Sun and for reflecting radio ...
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Low-frequency linear waves and instabilities in uniform and stratified plasmas: the role of kinetic effects
... Abstract. We review the basic approximations underlying magnetohydrodynamic (MHD) theory, with special empha- sis on the closure approximations, i.e. the approximations used in any fluid approach to close the hierarchy ...
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Turbulence of Second Sound Waves in Superfluid 4He: Effect of Low Frequency Resonant Perturbations
... sound waves in a high-Q resonator filled with superfluid helium that acoustic waves with fre- quency lower than the driving frequency may be generated due to nonlinearity: a sound wave with ...
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