In this paper we perform quantitative reconstruction of the electric susceptibility and the Grüneisen parameter of a non-magnetic linear dielectric medium using measurement of a multi-modal photoacoustic and optical coherence tomography system. We consider the mathematical model presented in [11], where a Fredholm integral equation of the first kind for the Grüneisen parameter was derived. For ...

An occulter is a large diffracting screen which may be flown in conjunction with a telescope to image extrasolar planets. The edge is shaped to minimize the diffracted light in a region beyond the occulter, and a telescope may be placed in this dark shadow to view an extrasolar system with the starlight removed. Errors in position, orientation, and shape of the occulter will diffract additional...

In this paper‎, ‎the existence and uniqueness of the ‎solution of a nonlinear fully fuzzy implicit integro-differential equation‎ ‎arising in the field of fluid mechanics is investigated. ‎First,‎ an equivalency lemma ‎is ‎presented ‎by‎ which the problem understudy ‎is ‎converted‎ to ‎the‎ two different forms of integral equation depending on the kind of differentiability of the solution. Then...

A theory of spin-polarized electron transport in ferromagnet-semiconductor heterostruc-tures, based on a unified semiclassical description of ballistic and diffusive transport in semiconductors, is outlined. The aim is to provide a framework for studying the interplay of spin relaxation and transport mechanism in spintronic devices. Transport inside the (nondegenerate) semiconductor is describe...

In this paper, the higher order hierarchical basis functions are employed to solve the electric field integral equation for computing electromagnetic scattering from three-dimension bodies comprising both conducting and dielectric objects. In higher-order methods of moments (HO-MoM), the equivalent surface electric and magnetic currents are usually expanded by the same basis functions, which ar...

An integral equation approach with a new solution procedure using moment method (MoM) is applied for the computation of coupled currents on the surface of a printed dipole antenna and inside its high-permittivity three-dimensional dielectric substrate. The main purpose of this study is to validate the accuracy and reliability of the previously proposed MoM procedure by authors for the solution ...

The underwater electromagnetic (EM) active detection technique attempts to reveal a stealth iron-hull vessel (submarine or surface warship) located in a horizontal layer of seawater. It is supposed that the vessel has no signature, acoustic or electromagnetic, and the only way to detect its presence is by measuring the scattering signal caused by an active source placed also in the water. Our g...

It is demonstrated that there is a common theoretical basis for the Singularity Expansion Method (SEM) and stabilized, preconditioned electric field and magnetic field integral equations (EFIE, MFIE) defining radiation and scattering from a closed perfect electric conductor in a homogeneous medium. An operator relation termed the Calderon preconditioner links the MFIE and EFIE, based on the fun...

The accurate solution of quasi-Helmholtz decomposed electric field integral equations (EFIEs) in the presence arbitrary excitations is addressed: Depending on specific excitation, components induced current density do not have same asymptotic scaling frequency, and thus, are solved for with, general, different relative accuracies. In order to ensure scaling, we propose a frequency normalization...

In this contribution, we present a new Hallén-type formulation for scattering by a two-dimensional, perfectly conducting rectangular plate. We derive two coupled integral equations for the components of the induced surface current, which are solved by marching on in time. The numerical results may exhibit instabilities, but the solution can be stabilized in various ways. To arrive at a more det...