A novel three-dimensional hybrid Finite Element Method (FEM) and Physical Optics (PO) technique for the efficient analysis of scattering problems is presented. It makes use of FEM for the regions with small and complex features and PO for the analysis of the electrically large objects of the structure taking into account mutual interactions between the FEM domains and the objects analyzed with ...

BACKGROUND/PURPOSE The advice that an adequate vitamin D status can be achieved by short, casual exposure to summer sunlight is ubiquitous. This review will examine the value of this advice. METHODS The results of experimental studies on changes in serum 25-hydroxyvitamin D [25(OH)D] concentrations following ultraviolet exposure are interpreted in the context of human exposure to sunlight. ...

A mathematical model is described for estimating changes in plasma 25-hydroxyvitamin D (25(OH)D) levels throughout the year as a consequence of varying the oral intake of vitamin D and the behaviour outdoors of white British adults resident in different regions of the UK. The model yields seasonal and geographical patterns of 25(OH)D concentrations that agree closely with observational studies....

Objective: To determine the effect of T loop spring position and activation on moment to force ratio. Materials and methods: Study conducted in two parts: (1) By using loop software by Halazonetis. Parameters studied were later on evaluated using FEM. Material properties along with the cross-sectional parameters being the same as in FEM, (2) using FEM, a large deflection nonlinear static analys...

CEMTool is a command style design and analyzing package for scientific and technological algorithm and a matrix based computation language. In this paper, we present new 2D & 3D finite element method (FEM) packages for CEMTool. We discuss the detailed structures and the important features of pre-processor, solver, and post-processor of CEMTool 2D & 3D FEM packages. In contrast to the existing M...

the available methods for predicting mechanical characteristics of pavement layers are categorized into two general groups, destructive and non-destructive. in destructive method, using coring and pavement subgrade and performing necessary experiments on them, the quantities of layers properties will be identified. in non-destructive method, the attained deflection is measured by applying the l...

the chromatic dispersion curve of the fundamental mode in small core microstructured fibres (SCMF) is both calculated using a Finite Element Method (FEM) and measured with a low coherence interferometric method. The great sensitivity of the chromatic dispersion to variations of the geometrical parameters of SCMFs (the pitch  and the diameter d) is pointed out. An excellent agreement is obtaine...

Purpose Small highly saturated interior permanent magnet- synchronous machines (IPMSMs) show a very nonlinear behaviour. Such are mostly controlled with closed-loop cascade control, which is based on d-q two-axis dynamic model constant concentrated parameters to calculate the control parameters. This paper aims present identification of complete current- and rotor position-dependent model, deri...

Self- and mutual inductances are major design parameters for wireless power transfer (WPT) systems. To optimize a WPT system estimate its performance in terms of received efficiency, it is essential to obtain simple, fast, accurate calculation these two parameters. The polarized double-D (DD) coils were selected due their simplicity structure, high low sensitivity misalignment conditions. This ...