http://ieeexplore.ieee.org/iel5/5176125/5187315/05187596.pdf

Geometrical Theory of Diffraction for Electromagnetic Waves

/pdf/scattering-of-dipole-field-by-a-perfect-electromagnetic-1yw5pqu0vw.pdf

Scattering of Dipole Field by a Perfect Electromagnetic Conductor Cylinder

Scattering of electromagnetic plane wave by an impedance strip embedded in homogeneous isotropic chiral medium

Electromagnetic scattering from an infinite and a finite length PEMC circular cylinder, illuminated by an arbitrarily oriented dipole, is investigated theoretically. An electric dipole as a source of excitation is considered first, and then a magnetic dipole as a source of excitation is treated. In contrast to the case of an axially directed dipole, it is shown that no additional terms are needed to incorporate the cross-polarized component of the field for the case of radial and circumferential dipoles. Numerical verifications are presented to verify the validity of derived results and numerical code by comparing results with the published literature.

Scattering of an arbitrarily oriented dipole field by an infinite and a finite length PEMC circular cylinder

We have studied the problem of diffraction of an electromagnetic spherical wave by a perfectly conducting finite strip in a homogeneous bi-isotropic medium and obtained some improved results. The problem was solved by using the Wiener-Hopf technique and Fourier transform. The scattered field in the far zone was determined by the method of steepest descent. The significance of the present analysis was that it recovered the results when a strip was widened into a half plane.

/pdf/a-note-on-spherical-electromagnetic-wave-diffraction-by-a-3b5b3miibf.pdf

A Note on Spherical Electromagnetic Wave Diffraction by a Perfectly Conducting Strip in a Homogeneous BI-Isotropic Medium

Diffraction of a plane wave from a geometry which contains an infinite slit in a perfect electric conducting (PEC) plane and a perfectly electromagnetic conductor (PEMC) cylinder is presented. The method is based on the extension of Clemmow, Karp and Russek solution for the diffraction by a wide slit. The results are compared with the published work and agreement is fairly good.

/pdf/scattering-of-electromagnetic-plane-wave-by-a-perfectly-3nx8maq3wu.pdf

Scattering of Electromagnetic Plane Wave by a Perfectly Conducting Slit and a PEMC Parallel Cylinder

Diffraction of an electromagnetic plane wave from a slit in an impedance plane has been presented The method is based on Maliuzhinets technique for impedance surfaces Comparison of the field patterns with different values of the face impedance are also presented

https://www.jpier.org/pierb/pierb05/17.08021402.pdf

Diffraction of EM Plane Wave by a Slit in an Impedance Plane Using Maliuzhinets Function

Scattering of electromagnetic plane waves from a coated perfect electromagnetic conductor � PEMCcircular cylinder placed under perfect electric conductingPECwide double wedge is presented. It is assumed that the distance between the two wedges is large as compared to the wavelength. Therefore, the field at an observation point can be considered to be composed of the incident field plus a response field from each of the edges of double wedge and the cylinder. PEMC cylinder is taken to be infinite along its axis and has been coated with a double positiveDPSor double negativeDNGmaterial. The transmission coefficient and diffraction pattern of PEC wide double wedge in the presence of both coated and uncoated PEMC cylinder are studied. Results of special cases for PEMC cylinder, compared with the published work, are found to be in fairly good agreement. The techniques of Clemmow, and Karp and Russek have been used to investigate the transmission coefficient and diffraction pattern of the double wedge in the presence of both coated and un-coated PEMC circular cylinder.

/pdf/scattering-of-electromagnetic-plane-waves-from-a-coated-pemc-1a6ij3vsxc.pdf

Scattering of Electromagnetic Plane Waves from a Coated PEMC Circular Cylinder Placed under PEC Wide Double Wedge

Electromagnetic scattering from coated nihility circular cylinders, illuminated by E-polarized plane wave, is investigated using an iterative procedure. Cylinders are infinite in length. The boundary conditions are applied on the surface of each cylinder in an iterative procedure in order to solve for the field expansion coefficients. The effect of different types of the coating layers including double positive (DPS) and double negative (DNG) on the alteration of the forward and backward scattering has been observed. Specially, the effect of dispersive and dissipative DNG coating layer has been focused. Numerical verifications are presented to prove the validity of this formulation by comparison with the published literature.

/pdf/effect-of-dissipative-and-dispersive-dng-material-coating-on-g0enjq9sb5.pdf

Effect of Dissipative and Dispersive DNG Material Coating on the Scattering Behavior of Parallel Nihility Circular Cylinders

Nematode contagion is a core impediment to the profitable dairy production for livestock farms. Gastrointestinal (GI) parasitism causes weight loss and low milk production, along with high mortality in sheep and goat. The current intensive anthelmintics therapies to control parasitic burden resulted in the appearance of drug resistant parasitic strains. Due to high demand of unadulterated animal products free from drugs motivated alternative strategies for improvement; including breeding plans for parasite control in ruminants. The increase of protective resistance to nematode infections, host genome show particular expression that is frequently confused by mechanisms concurrently essential to control multiple nematodes species as well as protozoan ecto-parasites, viral and microbial pathogens. The involved molecular mechanisms under these developments correspond to crucial steps toward improvement of efficient new parasite control strategies. Knowledge of various immunity methods of host and regulation of development of parasite, physiology, and virulence is able to identify the objective of parasite control. This review recapitulate current evolution and restrictions of optimistic regulatory biological pathways and genetic networks that concern with susceptibility and host resistance to infection of GI nematode in ruminants.

/pdf/role-of-cytokines-and-correlated-cells-in-host-immunity-3vof6hbbq2.pdf

Muhammad Naveed

Papers

Scattering of Electromagnetic Plane Wave by a Perfectly Conducting Slit and a PEMC Parallel Cylinder

Diffraction of EM Plane Wave by a Slit in an Impedance Plane Using Maliuzhinets Function

Scattering of Electromagnetic Plane Waves from a Coated PEMC Circular Cylinder Placed under PEC Wide Double Wedge

Effect of Dissipative and Dispersive DNG Material Coating on the Scattering Behavior of Parallel Nihility Circular Cylinders

Role of cytokines and correlated cells in host immunity against nematode in ruminants