The Kerr-Schild (KS) geometry is linked tightly with the auxiliary flat Minkowski background. Nevertheless, it describes many curved spacetimes and the related physical models, starting from cosmology and black holes to the microworld of the spinning elementary particles and the prequantum structure of vacuum fluctuations. We consider here a KS model of the Bubble Universe – a semi-closed Unive...

Suspended particles in the atmosphere during sand and dust storms have numerous consequences on electromagnetic wave propagation in arid regions. The electromagnetic wave signal may suffer attenuation and cross polarization upon encounter with the suspended particles. However, meager information has hitherto been reported about effect of storms on the telecommunication systems operating in such...

An improvedmodel of the fundamental plasma emission of type III solar radio bursts is presented. It is shown that nonlinear conversion of a traveling Langmuir pump wave into an electromagnetic wave can occur via either convective or absolute hybrid modulational instabilities, resulting from the coupling of two wave triplets, with the Langmuir pump wave and ion-acoustic daughter wave common to b...