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This paper describes numerical solving of the Laplace operator's eigenvalue problem for domain with space periodic boundaries, based on the Method of Auxiliary Sources (MAS) and with a lossy medium model. It discusses space periodic green function's representation in different sum and their convergence properties. A lossy medium model in the MAS is analyzed and assessed its applicability solveing...
The antenna structure is presented by two wires, one is arc shaped and another loop shaped. The antenna shape reminds concentrically placed letters “C” and “O” and for simplicity it is called “CO”. The main idea is to get antenna with simple design and directional radiation pattern. The antenna is studied numerically and simulation results are presented and discussed in this paper.
This paper describes the Method of Auxiliary Sources (MAS) and its application to eigenvalue problem of Laplace operator in case of periodic boundaries. The MAS is extended by applying appropriate Green function. The extended MAS presents an alternative approach for solving quantum billiard problems in case arbitrary shaped periodic boundaries.
Finite Difference Time Domain (FDTD) method is successfully applied and used in variety of problems in applied electrodynamics. In this paper we present FDTD method for heat equation for classical Fourier model as well as for Cattaneo and Chen-Tzou models in micro and nano scales. Cattaneo Bio-Heat Equation for 1D case is investigated.
The effect of NMR spin-echo enhancement of 55Mn nuclei arranged in domain walls of half metal Heusler compounds NiMnSb and NiMnSi in applied dc magnetic field was observed and studied. The effect could be related with the increase of spin-spin relaxation time at application of the outer dc magnetic field related with the rearrange and disappearance of the domain wall structure in the half metallic...
Plasmoinc structures, in particularly plasmonic nano antennas are very attractive in many applications. From other side numerical simulations of plasmonic structures are very demanding and expensive in terms of memory and CPU time, making the selection of a suitable numerical method for the field computation important. The numerical problems are caused because optical nanostructures based on metal...
In this article, the Method of Auxiliary Sources (MAS) is applied for analysis of angular incident of electromagnetic plane wave on two-dimensional dielectric sphere arrays. Homogeneous dielectrics spheres are placed on rectangular grid. To fulfill the Floquet conditions, in the MAS algorithm the lattice sum of electric dipoles is applied as a Green's function. The structures are investigated numerically...
We present cross platform programm package with memory efficient implementation of Finite Difference Time Domain (FDTD) method. Component modules implementation of the package is also presented.
Plasmonic structures are very attractive in many applications. From other side numerical simulations of plasmonic structures are very demanding and expensive in terms of memory and CPU time, making the selection of a suitable numerical method for the field computation important. The numerical problems are caused because optical nanostructures based on metal parts exhibit strong material dispersion,...
This paper presents numerical results of the Gauss-Newton minimization algorithm application to inversion of an orientation of the metallic object with an oblong form. The Method of Auxiliary Sources (MAS) is used to obtain the synthetic data of the electromagnetic induction (EMI) in conducted numerical investigations. In the studies, presented here, it is assumed that electromagnetic and geometrical...
The success of Research University highly depends on the well-conducted Research Administration and Management. Flexible and productive Research Management is one of basic points of modern university. Integrated scientific information system is a key future which could solve significant problem from the Research Administration and Management view-point in Georgia. Nowadays in Gerogia there is no comprehensive...
The Method of Auxiliary Sources (MAS) combined with Model-Based Parameter Estimation (MBPE) technique is applied to numerical simulations of plasmonic nano-structures. The MAS is a numerical technique for the calculation of electromagnetic fields in the frequency domain. The adaptive MBPE algorithm is based on Cauchy's formula and operates in the frequency domain to extrapolate or interpolate from...
A method of auxiliary sources (MAS) combined with model-based parameter estimation (MBPE) technique is applied to numerical simulations of plasmonic nano-structures. The MAS is a numerical technique for the calculation of electromagnetic fields in the frequency domain. The adaptive MBPE algorithm is based on Cauchy's formula and operates in the frequency domain to extrapolate or interpolate from a...
Electromagnetic induction (EMI) sensing has been identified as most promising technology for the detection and discrimination of subsurface metallic objects, particularly unexploded ordnances (UXO). In EMI, the sensors are detecting signals that are produced by induced and permanent magnetic polarizations. Soils, which contain small magnetic particles, called magnetically susceptible soils, can produce...
The motivation of this paper is brief overview of the future and performed activities on "rural wings" project. Scientific objective of the project is creation of the Internet Communication System in the rural, mountain areas of the Georgia. Motivation of this paper is also to introduce projects destiny, its significant necessity in the nook areas of the country.
In this paper, results of numerical simulation performed for assessment of human expose by EM radiation are presented. Visible human-air force model (http://www.nlm.nih.gov/research/visible/visible_human.html ) is chosen as realistic human model. Program package based on FDTD method is applied to simulate EM processes. Numerical study of EM expose is performed at discrete frequencies ranging from...
In this article a new methodology of remote exploration of buried bodies by means of pulse irradiation is presented. The ways to simplify the experimental evaluations are presented. The results of some software simulations of surface reconstruction are presented.
A new methodology of remote exploration of buried bodies by means of pulse irradiation is presented. The way to overcome losses and heterogeneities of the earth layers are discussed. The results of some software simulations of surface reconstruction are presented. Further investigation directions are outlined
Imitating waveguide aperture (IWGA) source for FDTD modeling is introduced and studied. IWGA source's mathematical expression is sufficient approximation of the near field, radiated from the fiber waveguide, in the process of computer simulation of the EM phenomena in PhCs; it could be used as excited source expression by the fiber waveguide
Paper presents results of numerical investigation, which reflect transmission characteristics of dielectric layers with one periodical shape to incident electromagnetic plane waves. Expanded for two dimensional and one periodic problem the method of auxiliary sources (MAS) is applied for numerical simulations
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