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THERMAL EFFECTS ON PROCESSING-STRUCTURE-PROPERTY RELATIONSHIPS IN HIGH TEMPERATURE PIEZOELECTRICSKowalski, Benjamin A. 02 June 2017 (has links)
No description available.
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Progress in Adaptive Electrical Capacitance TomographyZEESHAN, ZEESHAN January 2017 (has links)
No description available.
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Dielectric Constant Measurements Using Atomic Force Microscopy SystemDhanapala, Hembathanthirige Yasas 18 September 2012 (has links)
No description available.
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Nanometer Scale Electrical Characterization of Thin Dielectric FilmsLee, David T. 02 July 2002 (has links)
No description available.
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Syntheses, crystal structures, and dielectric property of oxynitride perovskitesKim, Young-Il 24 August 2005 (has links)
No description available.
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Development of Aluminum Oxide (Al2O3) Gate Dielectric Protein Biosensor under Physiologic BufferRen, Fang 19 June 2012 (has links)
No description available.
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DATA FITTING AND LEAST-SQUARE ESTIMATION OF NONLINEAR PARAMETERS FOR MODELS OF DIELECTRIC RELAXATION DATAZou, Hai 06 1900 (has links)
<p> The work in this thesis is to develop a tool for calculating the parameters
corresponding to certain theoretical model of dielectric relaxation
phenomena and then doing the curve fitting using the result after fetching the
data from the user. To our best knowledge, this the first such tool to calculate
the parameters corresponding to certain theoretical model of dielectric relaxation
phenomena while the user only need to provide the experimental data.
The parameters are calculated by using a nonlinear least square algorithm implemented
in Matlab and a nonlinear function minimizer available in Matlab.
The way to do the curve fitting is not by the traditional way such as cubic
spline but by calculating the simulated data using the chosen model and the
calculated result for the parameters. </p> <p> The available mathematical models include all of popular theoretical models, the Cole-Davidson (DC), the Kohlrausch-Williams-Watts (KWW),
the Havriliak-Negami (HN) and the model proposed by R. Hilfer (FD). </p> <p> There are two ways to calculate the parameters for each model as mentioned before. The result returned by this system may not be unique. Especially if the frequency range of data is not wide enough, the result would
most likely be non-unique. Since the iterative method is used in the system,
it is suggested that the user provides the initial values for the system with his
best knowledge or background for the data and the tested sample related to dielectric relaxation process. </p> <p> It is normal if there is a part having worse fitting than the other parts. One of reasons could be the mathematical model's defect, which the model does not work for that part. For the further information, please contact me by email at zouhaijun at yahoo.com. </p> / Thesis / Master of Science (MSc)
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Diffraction of Microwaves Along the Axis of Propagation Behind Conducting and Dielectric Rods and A Plastic Prism / Diffraction of MicrowavesYoung, Willard A. 05 1900 (has links)
Scope and Contents: The first chapter of this thesis consists of a general introduction and a brief description of previous work done in this same laboratory. Also included is a preliminary description of the present experiment. This is followed, in Chapter 2, by a detailed description of the experimental apparatus. The third and last chapter contains a description of the procedure used in obtaining results, as well as the results themselves. Measurements were made of the diffraction patterns of a plastic prism, and five rods in a total of nine different cases. In all cases, the intensity measurements were made along the axis of propagation of the incident beam behind the diffracting object. A polarization normal to the axis of the rods was used. Theoretical calculations were made in three cases, and compared with the experimental results. / Thesis / Master of Science (MS)
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Aperture-Coupled Asymmetric Dielectric Resonators Antenna for Wideband ApplicationsMajeed, Asmaa H., Abdullah, Abdulkareem S., Elmegri, Fauzi, Sayidmarie, Khalil H., Abd-Alhameed, Raed, Noras, James M. 05 1900 (has links)
Yes / A compact dielectric resonator antenna (DRA) for wideband applications is proposed. Two cylindrical dielectric resonators which are asymmetrically located with respect to the center of a rectangular coupling aperture are fed through this aperture. By optimizing the design parameters, an impedance bandwidth of about 29%, covering the frequency range from 9.62 GHz to 12.9 GHz, and a gain of 8 dBi are obtained. Design details of the proposed antenna and the results of both simulation and experiment are presented and discussed.
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Improved dielectric performance of polypropylene/multiwalled carbon nanotube nanocomposites by solid-phase orientationLin, X., Tian, J.-W., Hu, P.-H., Ambardekar, Rohan, Thompson, Glen P., Dang, Z.-M., Coates, Philip D. 26 September 2015 (has links)
Yes / By means of die drawing technique at rubber-state, effect of the orientation of
microstructure on dielectric properties of polypropylene/multi-walled carbon nanotubes
nanocomposites (PP/MWCNTs) was emphasized in this work. Viscoelasticity behavior of
PP/MWCNTs with MWCNTs weight loadings from 0.25 to 5 wt% and dielectric performance of the
stretched PP/MWCNTs under different drawing speeds and drawing ratios were studied for seeking
an insight of the influences of dispersion and orientation state of MWCNTs and matrix molecular
chains. A viscosity decrease (ca. 30%) of the PP/MWCNTs-0.25wt% melt was obviously observed
owing to the free volume effect. Differential scanning calorimetry (DSC) and wide angle X-ray
diffraction (WAXD) were adopted to detect the orientation structure and the variation of crystal
morphology of PP/MWCNTs. Melting plateau regions, which indicated the mixed crystallization
morphology for the stretched samples, were found in the DSC patterns instead of a single-peak for
the unstretched samples. It was found that the uniaxial stretching process broke the conductive MWCNTs networks and consequently increased the orientation of MWCNTs as well as molecular
chains along the tensile force direction, leading to an improvement of the dielectric performance.
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