Browsing by Keywords "Numerical analysis"
Now showing items 1-20 of 26
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Chiral metamaterials with negative refractive index based on four "U" split ring resonators
(American Institute of Physics, 2010-08-23)A uniaxial chiral metamaterial is constructed by double-layered four "U" split ring resonators mutually twisted by 90°. It shows a giant optical activity and circular dichroism. The retrieval results reveal that a negative ... -
Closed-form green's functions of HED, HMD, VED, and VMD for multilayer media
(IEEE, 1993-06-07)The closed-form Green's functions of the vector and scalar potentials in the spatial domain are presented for the sources of horizontal electric, magnetic, and vertical electric, magnetic dipoles embedded in a general, ... -
Efficiency of the Turkish stock exchange with respect to monetary variables: a cointegration analysis
(Elsevier BV, 1996)In this study, we test the semistrong form of the efficient market hypothesis in Turkey by using the recently developed techniques in time series econometrics, namely unit roots and cointegration. The long run relationship ... -
Enhanced hole transport in InGaN/GaN multiple quantum well light-emitting diodes with a p-type doped quantum barrier
(Optical Society of America, 2013)We study hole transport behavior of InGaN/GaN light-emitting diodes with the dual wavelength emission method. It is found that at low injection levels, light emission is mainly from quantum wells near p-GaN, indicating ... -
Extension of forward-backward method with DFT-based acceleration algorithm for the efficient analysis of large periodic arrays with arbitrary boundaries
(John Wiley & Sons, 2005)An extension of the discrete Fourier transform (DFT)-based forward-backward algorithm is developed using the virtual-element approach to provide a fast and accurate analysis of electromagnetic radiation/scattering from ... -
Improved testing of the magnetic-field integral equation
(Institute of Electrical and Electronics Engineers, 2005)An improved implementation of the magnetic-field integral equation (MFIE) is presented in order to eliminate some of the restrictions on the testing integral due to the singularities. Galerkin solution of the MFIE by the ... -
An interactive software package for the investigation of hydrodynamic-slider bearing-lubrication
(2003)The temperature dependent character of viscosity complicates the numerical analysis of hydrodynamic slider bearings and the geometry of the flow cavity plays a significant role on the design and performance of the lubrication ... -
Interpretation of the space-bandwidth product as the entropy of distinct connection patterns in multifacet optical interconnection architectures
(Optical Society of America, 1993)We show that the entropy of the distinct connection patterns that are possible with multifacet optical interconnection architectures is approximately equal to the space-bandwidth product of the optical system. -
Keyframe reduction techniques for motion capture data
(IEEE, 2008-05)Two methods for keyframe reduction of motion capture data are presented. Keyframe reduction of motion capture data enables animators to easily edit motion data with smaller number of keyframes. One of the approaches achieves ... -
Kronecker-based infinite level-dependent QBD processes
(Applied Probability Trust, 2012)Markovian systems with multiple interacting subsystems under the influence of a control unit are considered. The state spaces of the subsystems are countably infinite, whereas that of the control unit is finite. A recent ... -
Kronecker-based infinite level-dependent QBDS : matrix analytic solution versus simulation
(Bilkent University, 2011)Markovian systems with multiple interacting subsystems under the influence of a control unit are considered. The state spaces of the subsystems are countably in- finite, whereas that of the control unit is finite. A ... -
Mathematical and numerical modeling of the effect of input-parameters on the flushing efficiency of plasma channel in EDM process
(Elsevier Ltd, 2013)In the present study, the temperature distribution on the surface of workpiece and tool during a single discharge in the electrical discharge machining process has been simulated using ABAQUS code finite element software. ... -
Multi-gap individual and coupled split-ring resonator structures
(Optical Society of American (OSA), 2008)We present a systematic numerical study, validated by accompanied experimental data, of individual and coupled split ring resonators (SRRs) of a single rectangular ring with one, two and four gaps. We discuss the behavior ... -
Numerical analysis for remote identification of materials with magnetic characteristics
(2011)There is a variety of methods used for remote sensing of objects such as acoustic, ground penetration radar detection, electromagnetic induction spectroscopy, infrared imaging, thermal neutron activation, core four-pole ... -
On the optimality of stochastic signaling under an average power constraint
(IEEE, 2010-09-10)In this paper, stochastic signaling is studied for scalar valued binary communications systems over additive noise channels in the presence of an average power constraint. For a given decision rule at the receiver, the ... -
Optical implementation of the two-dimensional fractional Fourier transform with different orders in the two dimensions
(Elsevier BV * North-Holland, 1995-10-15)Previous optical implementations of the two-dimensional fractional Fourier transform have assumed identical transform orders in both dimensions. We let the orders in the two orthogonal dimensions to be different and present ... -
The optimal electromagnetic carrier frequency balancing structural and metrical information densities with respect to heat removal requirements
(1992)The use of higher electromagnetic carrier frequencies for communication in a computing results in both increased spatial information density and larger available modulation bandwidth. However, assuming that the communication ... -
Radiation characteristics of a 2D parabolic reflector antenna excited by the H-polarized complex source
(IEEE, 2002-09)The aim of this paper is to obtain accurate reference data for relatively large and realistic reflector antenna systems. We concentrate on a parabolic reflector antenna in the H-polarization case. The directive primary ... -
RCS study of cylindrical cavity-backed apertures with outer or inner material coating: the case of e-polarization
(IEEE, 1993)Cavity-backed apertures (CBA) are encountered as parts of any airborne or spaceborne radar targets. Most familiar of them are, probably, air inlets and engine tubes, known to contribute a great deal to radar cross section ... -
Real-space condensation in a dilute Bose gas at low temperature
(Natsional'na Akademiya Nauk Ukrainy, 2001)We show with a direct numerical analysis that a dilute Bose gas in an external potential - which is choosen for simplicity as a radial parabolic well - undergoes at certain temperature Tc a phase transition to a state ...
