Three electromagnetic models are employed for the investigation of ultrawideband VHF scattering from tree trunks situated over flat and sloped terrain. Two of the models are numerical, each employing a frequency-domain integral-equation formulation solved via the method of moments (MoM). A body-of-revolution (BoR) MoM formulation is applied for a tree trunk on a flat terrain, implying that the ...

The nite-diierence time-domain (FDTD) method is a numerical technique that makes no explicit physical approximations to the underlying problem. The quality of an FDTD-based solution typically is determined by the discretization of the computational domain|the smaller the spacing, the more accurate the solution. Unfortunately, for large computational domains, i.e., ones spanning many wavelengths...

We have examined the Maxwell-Garnett, inverted Maxwell-Garnett, and Bruggeman rules for evaluation of the mean permittivity involving partially empty cells at particle surface in conjunction with the finite-difference time-domain (FDTD) computation. Sensitivity studies show that the inverted Maxwell-Garnett rule is the most effective in reducing the staircasing effect. The discontinuity of perm...

In this paper we have improved the result of Bor [Bull. Math. Anal. Appl.1, (2009), 15-21] on local property of N, pn, θn k summability of factored Fourier series by proving under weaker conditions.

ing Event-Driven Systems with Lifestate Rules Shawn Meier Aleksandar Chakarov Maxwell Russek Sergio Mover Bor-Yuh Evan Chang University of Colorado Boulder {shawn.meier, aleksandar.chakarov, maxwell.russek, sergio.mover, evan.chang}@colorado.edu

This paper presents an efficient and simple approach of implementing the Landau-Lifshitz-Gilbert (LLG) equation of magnetisation motion within the Finite-difference Time-domain (FDTD) method. This combined electromagnetic-micromagnetic simulation technique is particularly important for modeling electromagnetic interaction with lossy magnetic material in the presence of current and magnetic sour...

In this article we present νFDTD (New FDTD), an efficient and accurate method for solving low frequency problems and with those non-conformal geometries by using the Finite Difference Time Domain (FDTD) method. The conventional time domain technique FDTD demands extensive computational resources when solving low frequency problems, or when dealing with dispersive media. The νFDTD technique is a...

Understanding and predicting electromagnetic behavior is needed more and more in modern technology. The Finite-Difference Time-Domain (FDTD) method is a powerful computational electromagnetic technique for modelling electromagnetic space. However, the computation of this method is complex and time consuming. Implementing this algorithm in hardware will greatly increase its computational speed a...

HÜSEYİN BOR Abstract. In this paper, a general theorem dealing with the local property of | N̄ , pn, θn |k summability of factored Fourier series has been proved , which generalizes some known results. 2010 AMS Subject Classification: 40G99, 42A24, 42B08.

in this paper, we proposed a novel structure for designing all optical filter based on photonic crystal structure. in designing the proposed filter, we simply employed a point defect localized between input and output waveguides as wavelength selecting part of the filter. the initial form of this filter is capable of selecting optical waves at =1560 nm, the transmission efficiency of the filte...