Copyright 1996-2012 Researchpub.org. All rights Reserved. 25 Abstract— In this paper ,the solution of describing the radiation field of V.E.D placed above a plane grid screen is presented. If is shown that both the solution and the related computational. Procedure can be substantially simplified using methods of virtual images and boundary conditions, the method requires the proper Fourier tra...

We deal with an inverse problem arising in corrosion detection. The presence of corrosion damage is modeled by a nonlinear boundary condition on the inaccessible portion of the metal specimen. We propose a method for the approximate reconstruction of such a nonlinearity. A crucial step of this procedure, which encapsulates the major cause of the ill-posedness of the problem, consists of the sol...

Pressure effects on transport as well as structural properties have been investigated for a bilayer manganite, La222xSr112xMn2O7 (x50.48), near the phase boundary between the ferromagnetic metallic and the A-type antiferromagnetic states. An insulator-metal ~IM! transition is found to be induced by applying pressure of ;0.7 GPa. On the basis of the synchrotron radiation x-ray structural analysi...

We present a multi-scale approach to modeling the electro-mechanical behavior of ionic polymers. We start with a detailed elasto-electro-chemical model which allows for nite deformation. We reduce it to one space dimension appropriate for the commonly used sheet con guration, and demonstrate that steady state solutions display an important boundary layer e ect. We conclude with a macroscopic mo...

In order to investigate the origin of the until now unaccounted excess noise and to minimize the uncontrollable phenomena at the transition in X-ray mi-crocalorimeters we have developed superconducting transition-edge sensors into an edgeless geometry, the so-called Corbino disk (CorTES), with super-conducting contacts in the centre and at the outer perimeter. The measured rms current noise and...

Background: Under severe operating conditions, such as lubricant contamination, elevated temperatures and high unit loads, the hydrodynamic (HD) lubrication condition in a HD bearing may degrade and be reduced to mixed and boundary lubrication conditions, which traditional pad bearing materials (Babbitt metal) are not able to sustain. For example, Electrical Submersible Pump (ESP) systems are r...

In the nonmetallic state of the organic superconductor k-~BEDT-TTF)2Cu@N(CN)2#Br synthesized with deuterated BEDT-TTF molecule, an angle-dependent electron spin resonance signal below 6–8 K was found. This is interpreted in terms of an antiferromagnetic resonance. The signal was found only when the sample was rapidly cooled, corresponding to the characteristics in that the present salt stays cl...

A spatial bandpass filter resonant at 1.5 m and based on a frequency-selective surface (FSS) was analyzed and fabricated. It consists of circular apertures arranged in a hexagonal lattice and was modeled using a hybrid finite-element/boundary-integral method, which accounted for metal thickness and conductivity. Measurements demonstrate the accuracy of the design. © 2004 Wiley Periodicals, Inc....

In this paper we describe and analyze some modified boundary element methods to solve exterior boundary value problems for the Helmholtz equation with either Dirichlet or Neumann boundary conditions. The proposed approach avoids spurious modes even in the case of Lipschitz boundaries. Moreover, the regularisation is done based on boundary integral operators which are already available in standa...

An analytic solution is presented describing ̄ow to a drain in a semi-in®nite domain bounded by a leaky layer of constant thickness. The solution is developed by applying the method of images to two parallel boundaries: an inhomogeneity boundary and an equipotential boundary. It is then demonstrated that the solution for the problem with the leaky layer approximated by a leaky boundary (a mixed...