In this contribution an enhanced version of the Finite Difference Time Domain (FDTD) method is used to calculate the field penetration and Specific Absorption Rate (S-AR) pattern for a current sheet applicator used in Hyperthermia treatment. The FDTD method uses modified equations to rigorously model three dimensional dielectric boundaries and a nonuniform grid for computational efficiency. Res...

The finite-difference time-domain (FDTD) method is one of the most widely used computational methods in electromagnetic. This paper describes the design of two-dimensional (2D) FDTD simulation software for transverse magnetic (TM) polarization using Berenger's split-field perfectly matched layer (PML) formulation. The software is developed using Matlab programming language. Numerical examples v...

this study was designed to present and compare iranian hospitals` performance applying ratio analysis technique.this cross-sectional survey was conducted to present an instant image of 139 iranian hospitals` performance status applying ratio analysis as one of the non parametric technical efficiency assessment methods in 2008. data was collected using nine dimensional questionnaires supported b...

─ Finite-Difference Time-Domain (FDTD) modeling of electromagnetic wave propagation in the Earth-ionosphere waveguide has gained significant interest over the past two decades. Initially, FDTD modeling capabilities were largely limited to two-dimensional models assuming a plasma ionosphere (but incapable of accounting for Faraday rotation), or to threedimensional global models assuming a simple...

Doğada elemental olarak bulunmayan bor, yerkabuğunda yaygın bulunur ve periyodik tablonun 5.elementidir. Yaklaşık 230 farklı bor mineralinin bulunduğu bilinmektedir uygulamalarda bu çeşitlilik önemlidir. Türkiye, dünyadaki rezervlerinin en büyüğüne sahiptir. Buna ek olarak, Türkiye'nin mineralleri, diğer üreten ülkelere göre daha ekonomik olan yüksek kalite üretim koşullarına Bu nedenle, ülkemi...

In this paper, we use finite-difference time domain beam propagation method (FDTD-BPM) to analyze the pulse propagation in directional couplers. FDTD-BPM is an efficient method in numerical computation of optical passive components. The alternating-direction implicit method (ADIM) is applied to discretize the wave equation. The generalized Douglas (GD) scheme is used to the second order derivat...

Finite-difference time-domain (FDTD) grids are often described as being divergence-free in a source-free region of space. However, in the presence of a source, the continuity equation states that charges may be deposited in the grid, while Gauss’s law dictates that the fields must diverge from any deposited charge. The FDTD method will accurately predict the (diverging) fields associated with c...

In this paper, an unconditionally stable three-dimensional (3-D) finite-difference time-method (FDTD) is presented where the time step used is no longer restricted by stability but by accuracy. The principle of the alternating direction implicit (ADI) technique that has been used in formulating an unconditionally stable two-dimensional FDTD is applied. Unlike the conventional ADI algorithms, ho...