Electromagnetic Pulse Propagation Over Nonuniform Earth Surface: Numerical Simulation

Near-Field Time-Domain Shielding Effectiveness of Thin Conductive Screens

“…In the literature, several types of planar screens have been considered (including metamaterial and periodic screens), under time-harmonic plane-wave, line, and dipole excitations [5][6][7]. However, when a transient source is considered, the solution is not trivial [8,9], and must be derived numerically even in simple geometries through a double integral which corresponds to two synthesis steps: first, the frequency-domain (FD) solution is obtained via a spatial-wavenumber synthesis (usually expressed as a Sommerfeld integral) and then the time-domain (TD) solution via a frequency synthesis (by performing another integration over the frequency range). Usually these integrals are highly oscillatory and slow-decaying thus making the process very time-consuming.…”

Light Weighs

“…According to the frequency, the EMR can behave as a wave or as a corpuscle, a particle [21][22][23][24]. Along with what Einstein maintained, radio waves and microwaves have an undulating behaviour; on the contrary X and gamma rays behave as particles [25][26][27][28]. However, we have to keep in mind we are talking about EMWs which, according to their lower or higher frequency, can behave respectively either as waves, or as particles.…”

Geoelectrical Anomalies Imaged by Polar and Dipolar Probability Tomography

“…Given the importance of the related applications, this argument always attracts many specialists worldwide, as documented by the vast literature especially of the last decade, in conjunction with the computer technology increasing efficacy (see, e.g., [1,2,6,8,10,22,26,29,30], to quote a few most recent papers freely available online).…”