Electronic & Electrical Eng (Scholarly Publications): Recent submissions
Now showing items 301-320 of 610
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An improved technique for the measurement of the complex susceptibility of magnetic colloids in the microwave region
(Elsevier, 2010)Measurements by means of the short-circuit (S/C) and open circuit (O/C) transmission line techniques are well established methods for investigating the magnetic and dielectric properties of magnetic colloids, respectively. ... -
Microwave absorbent properties of nanosized cobalt ferrite powders prepared by coprecipitation and subjected to different thermal treatments
(Elsevier, 2011)Cobalt ferrite nanopowders were produced by means of two methods using a common precipitating agent. After precipitation, in the first method the cobalt ferrite was calcined, whilst in the second method the precipitation ... -
Evaluating Sensorineural Hearing Loss With An Auditory Nerve Model Using A Mean Structural Similarity Measure.
(2010)Hearing loss research has traditionally been based on perceptual criteria, speech intelligibility and threshold levels. The development of computational models of the auditory-periphery has allowed experimentation via ... -
Spontaneous Periodic Deformations in Nonchiral Planar-Aligned Bimesogens with a Nematic-Nematic Transition and a Negative Elastic Constant
(2010)Hydrocarbon linked mesogenic dimers are found to exhibit an additional nematic phase below the conventional uniaxial nematic phase as confirmed by x-ray diffraction. The phase produces unusual periodic stripe domains in ... -
Numerical methods for calculation of optical properties of
(2010)Three methods, namely 2?2 and 4?4 transfer matrix methods as well as scattering matrix method, for simulation of the transmission and reflection spectra of the layered structures are described in this paper. The advantages ... -
Dissociative CdSe/ZnS quantum dot-molecule complex for luminescent
(2010)The optical properties of dissociative luminescent sensors based on a complex consisting of highly luminescent hydrophobic core/shell CdSe/ZnS quantum dots QDs and 1- 2-pyridilazo -2-naphtol PAN molecules in organic ... -
Raman and Fourier transform infrared study of substitutional carbon incorporation in rapid thermal chemical vapor deposited Si 1-x-yGexCy on (1 0 0) Si
(2010)We report on a detailed study of the dependence of the vibrational modes in rapid thermal chemical vapor deposited Si1?x?yGexCy films on the substitutional carbon concentration. Si1?x?yGexCy films were investigated using ... -
Electron-electron scattering in a double quantum dot: Effective mass approach
(American Institute of Physics, 2010)We present a theoretical description of the first-order scattering of interacting electrons and holes in a double quantum dot. Assuming infinitely high walls, strong confinement, and a two-band approximation, we derive ... -
Orientational order of a ferroelectric liquid crystal with small layer contraction
(2010)We present spectroscopic and optical studies of a non-layer-shrinkage ferroelectric liquid crystal DSiKN65. The orientational order parameters S, measured with respect to the smectic layer normal using IR spectroscopy on ... -
Classical quantum crossover in magnetic stochastic resonance in uniaxial superparamagnets
(2010)It is shown that the signal-to-noise ratio of the magnetic moment fluctuations in the magnetic stochastic resonance of a quantum uniaxial paramagnet of arbitrary spin value S subjected to a weak probing ac field H(t) = ... -
Dielectric study of the electroclinic effect in the smectic-A phase
(American Physical Society, 1994)The dielectric properties of a smectic-A liquid crystal in the presence of a dc bias field are studied in the frequency range 100 Hz?1 MHz. It is shown that near the smectic-A?smectic-C* phase transition the relaxation ... -
Molecular dynamics of iso-amyl bromide by dielectric spectroscopy, and the effects of a nonpolar solvent, 2-methylpentane, on the spectral features
(American Institute of Physics, 1999)To gain insight into the effects of the weakening of the electrostatic interactions on molecular dynamics when polar molecules are dissolved in a nonpolar solvent, the dielectric polarization and relaxation behaviors of ... -
Dynamics of Collective and Molecular Modes of a Ferroelectric Liquid Crystal in Confined Geometry Using Dielectric Spectroscopy.
(American Physical Society, 1997)Two aerogel systems containing a ferroelectric liquid crystal (FLC) with smectic phases over a wider temperature range are investigated using dielectric spectroscopy. The second order transition from Sm- A to Sm-Cp is ... -
Alignment instability caused by anchoring of the in-plane directors to the rubbing direction in the V-shaped switching
(2000)In order to investigate the molecular alignment in the smectic liquid crystals showing the V-shaped switching behavior, two types of the liquid crystal cells, a sandwiched cell and an open cell, were prepared. ... -
Ferrielectric liquid crystal subphase studied by polarized Fourier-transform infrared spectroscopy
(American Physical Society, 2000)IR dichroism and the structure of a homogeneously aligned cell of a chiral smectic antiferroelectric liquid crystal (R)-1-methylheptyl 4-(4?-dodecyloxybiphenyl-4-ylcarbonyloxy)-3-fluorobenzoate [with acronym (R)-12OF1M7] ... -
Field-induced phase transitions in an antiferroelectric liquid crystal using the pyroelectric effect.
(American Physical Society, 2000)The antiferroelectric liquid crystal (AFLC) under investigation possesses different helical polar phases. Measurements of pyroelectric response of these phases as a function of temperature and bias field have elucidated ... -
Rotational bias of an antiferroelectric liquid crystal studied by polarized Fourier transform infrared spectroscopy
(1999)Experimental studies of the absorbance vs polarization angle of the incident ir beam on a cell have been carried out for several absorbance bands in the SmA phase and in electrically induced ferroelectric states F(1) and ... -
The exponential dielectric relaxation dynamics in a secondary alcohol's supercooled liquid and glassy states
(2000)To gain insight into a recent observation that the prominent, Debye-type relaxation process observed for a primary alcohol may not be the a-relaxation process associated with molecular diffusion of a liquid @Europhys. ... -
Effects of induced steric hindrance on the dielectric behavior and H bonding in the supercooled liquid and vitreous alcohol
(American Institute of Physics, 2001)The reasons of Debye-type dielectric relaxation in monohydroxy alcohols were investigated by studying the effects of steric hindrance on dielectric behavior and hydrogen bonding in alcohols. Broadband dielectric spectroscopy ... -
Nonexponential dielectric relaxation dynamics in supercooled liquid and glassy states of isoamyl bromide and 2-methylpentane mixtures
(American Institute of Physics, 2001)The dielectric spectra of mixtures of the polar solute isoamyl bromide in 2-methylpentane have been investigated in the frequency range 1 mHz to 1 MHz and in the temperature range approaching the glass transition temperature. ...
