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Simulation models for the direct time-domain analysis of transients in lossy multiconductor lines are presented. An efficient analysis method is described which is used for analysing transients when nonlinear phenomena occur, when nonuniform lines are considered or in dealing with problems exhibiting very different time constants. Transient per unit length (p.u.1.) parameters associated with the presence of a lossy ground are proposed in a wide time interval. Results are presented and validated by comparisons with available codes

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The sections in this article are Basic Definitions Electrostatics Magnetostatics Electromagnetics Plane Waves Against Multilayer Planar Shields Characterization of Near‐Field Sources Apertures Effects on Shielding Performance Shielding Performance Measurement and Standards Shielding Effectiveness of Metallic Enclosures Current Research Topics

The piezoelectric performance of ultra-strength ZnO nanowires (NWs) depends on the subtle interplay between electrical and mechanical size-effects. "Size-dependent" modeling of compressed NWs illustrates why experimentally observed mechanical stiffening can indeed collide with electrical size-effects when the size shrinks, thereby lowering the actual piezoelectric function from bulk estimates. "Smaller" is not necessarily "better" in nanotechnology.

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The problem of the shielding evaluation of an infinitesimally thin perfectly conducting circular disk against a vertical magnetic dipole is here addressed. The problem is reduced to a set of dual integral equations and solved in an exact form through the application of the Galerkin method in the Hankel transform domain. It is shown that a second-kind Fredholm infinite matrix-operator equation can be obtained by selecting a complete set of orthogonal eigenfunctions of the static part of the integral operator as expansion basis. A static solution is finally extracted in a closed form which is shown to be accurate up to remarkably high frequencies.

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