Güncel Gönderiler: Fen Edebiyat Fakültesi Koleksiyonu
Toplam kayıt 1212, listelenen: 681-700
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Characterization of one-step deposited Cu2ZnSnS4 thin films derived from a single crystalline powder
(Pergamon-Elsevier Science Ltd, 2019)In this paper, Cu-deficient and Zn-rich Cu2ZnSnS4 (CZTS) single crystals were successfully grown by Bridgman technique. Following the investigation of structural and photo-electrical properties of the grown CZTS crystal, ... -
Symmetry of Brans-Dicke gravity as a novel solution-generating technique
(Amer Physical Soc, 2018)A symmetry of Brans-Dicke gravity in (electro) vacuo or in the presence of conformally invariant matter is presented and used as a solution-generating technique starting from a known solution as a seed. This novel technique ... -
Perfect fluid solutions of Brans-Dicke and f (R) cosmology
(Academic Press Inc Elsevier Science, 2018)Brans-Dicke cosmology with an (inverse) power-law potential is revisited in the light of modern quintessence and inflation models. A simple ansatz relating scale factor and scalar field recovers most of the known solutions ... -
Investigation of carrier transport mechanisms in the Cu-Zn-Se based hetero-structure grown by sputtering technique
(Canadian Science Publishing, Nrc Research Press, 2018)In this paper, we present results of the electrical characterization of n-Si/p-Cu-Zn-Se hetero-structure. Sputtered film was found in Se-rich behavior with tetragonal polycrystalline nature along with (112) preferred ... -
Determination of height profile from a two-dimensional fringe signal using a two-dimensional continuous wavelet transform
(Scientific Technical Research Council Turkey-Tubitak, 2017)The main objective of this study was 3-dimensional (3D) profile measurements with standard fringe projection, consisting of a CCD and a projector. For obtaining height information of objects pixel by pixel, phases have to ... -
Ultrasonic Spray Pyrolysis Deposited Copper Sulphide Thin Films for Solar Cell Applications
(Wiley-Hindawi, 2017)Polycrystalline copper sulphide (CuxS) thin films were grown by ultrasonic spray pyrolysis method using aqueous solutions of copper chloride and thiourea without any complexing agent at various substrate temperatures of ... -
Ab initio study of structural, elastic, and vibrational properties of transition-metal disilicides NbSi2 and TaSi2 in hexagonal C40 structure
(Elsevier, 2018)We present an ab initio study of structural, elastic and vibrational properties of transition-metal disilicides NbSi2 and TaSi2. The calculations have been carried out within the density-functional theory and linear-response ... -
Investigation of precursor sequence and post-annealing effects on the properties of Cu2SnZnSe4 thin films deposited by the elemental thermal evaporation
(Iop Publishing Ltd, 2017)Cu2ZnSnSe4 (CZTSe) thin films were deposited onto soda lime glass substrates by thermal evaporation using the pure elemental sources. The influence of the sequential deposition order of Zn and Sn precursor layers for ... -
The generalized Morse wavelet method to determine refractive index dispersion of dielectric films
(Iop Publishing Ltd, 2017)The continuous wavelet transform (CWT) method is a useful tool for the determination of refractive index dispersion of dielectric films. Mother wavelet selection is an important factor for the accuracy of the results when ... -
Optical Phase Distribution Evaluation by Using Zero Order Generalized Morse Wavelet
(Amer Inst Physics, 2017)When determining the phase from the projected fringes by using continuous wavelet transform (CWT), selection of wavelet is an important step. A new wavelet for phase retrieval from the fringe pattern with the spatial carrier ... -
Some Properties of Magnetized Bonnor-Dihole Solution in Brans-Dicke Theory
(Amer Inst Physics, 2017)Soule properties of magnetized Bonnor-dihole solution in Brans Dicke(BD) theory is discussed. Conical deficit angle and equatiorial geodesics of (jawlike and null particles are investigated in detail for different values ... -
Quantitative Phase Imaging of Red Blood Cell by Diffraction Phase Microscopy
(IEEE, 2017)Diffraction phase microscopy maintains the single shot measurement and low speckle noise associated with white light. A microscope with halogen lamp and a Mach-Zehnder interferometer were combined to obtain images of red ... -
Deposition of CZTSe thin films and illumination effects on the device properties of Ag/n-Si/p-CZTSe/In heterostructure
(Elsevier Science Sa, 2017)Characterization of Cu2ZnSnSe4 (CZTSe) thin films deposited by thermal evaporation sequentially from the pure elemental sources and in-situ post annealing was carried out at 400 C under Se evaporation atmosphere. Another ... -
A Comparative Study of AC Transport and Eddy Current Losses for Coil Made of HTS Tapes Coated with Copper Stabilizer
(Springer, 2017)In this work, the evaluation of AC loss of the pancake coils wound by HTS-coated conductors, by employing the finite element method in 2D, is presented. The transport current loss of the superconducting tape and the eddy ... -
AC Loss Analysis of HTS Pancake Coil of Coated Superconductors with Ferromagnetic Substrate
(Springer, 2017)The influence of the ferromagnetic substrate on the AC loss of an HTS coil is extensively investigated by the finite element method. The model assumes the utilization of the coated conductors with a ferromagnetic substrate ... -
3D Profile Measurements of Objects by Using Zero Order Generalized Morse Wavelet
(Amer Inst Physics, 2017)Generalized Morse wavelets are proposed to evaluate the phase information from projected fringe pattern with the spatial carrier frequency in the x direction. The height profile of the object is determined through the phase ... -
A Simulation Study for Determination of Refractive Index Dispersion of Dielectric Film from Reflectance Spectrum by Using Paul Wavelet
(Amer Inst Physics, 2017)In this work, the Continuous Wavelet Transform (CWT) with Paul wavelet was improved as a tool for determination of refractive index dispersion of dielectric film by using the reflectance spectrum of the film The reflectance ... -
An Improved Method For Determination of Refractive Index of Absorbing Films: A Simulation Study
(Amer Inst Physics, 2017)In this work an improved version of the method presented by Gandhi was presented for determination of refractive index of absorbing films. In this method local maxima of consecutive interference order in transmittance ... -
Calculation of AC loss in two-layer superconducting cable with equal currents in the layers
(Elsevier, 2016)A new method for calculating AC loss of two-layer SC power transmission cables using the commercial software Comsol Multiphysics, relying on the approach of the equal partition of current between the layers is proposed. ... -
An Improved Method For the Determination of Birefringence Dispersion of Liquid Crystal Cell: A Simulation Study
(Amer Inst Physics, 2016)An improved approach to determine the birefringence dispersion of a liquid crystal cell was presented. Using the local maxima or minima of the transmittance spectrum of liquid crystal cell is a very convenient method for ...