A practical method is proposed for determining the wave vector of waves from single-spacecraft measurements. This wave vector knowledge can then be used to remove the space-time ambiguity produced by frequency Doppler shift associated with spacecraft motion. The method involves applying the Wiener-Khinchin theorem to cross correlations of the current and magnetic field oscillations and to autoc...

For the diagnosing modality called MRE (magnetic resonance elastography), the displacement vector of a wave propagating in a human tissue can be measured. The average of the local wavelength from this measured data could be an index for the diagnosing, because the local wave length becomes larger when the tissue is stiffer. By assuming that the local form of the wave is given approximately as m...

We consider conformal vector models which could play the role of a cosmological dark radiation component. analyse propagation gravitational waves in presence this background and find suppression tensor transfer function at large scales. also that although metric is isotropic, anisotropies are imprinted power spectrum. In addition, fields induces net polarization wave and, for certain configurat...