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Öğe Finite Differences Method for One Dimensional Nonlinear Parabolic Equation with Double Nonlinearity(Springer-Verlag Berlin, 2013) Sinsoysal, Bahaddin; Coruhlu, TurgayThe finite differences scheme for finding a numerical solution of the parabolic equation with double nonlinearity is suggested. For this purpose a special auxiliary problem having some advantages over the main problem is introduced. Some properties of the numerical solution are studied and using the advantages of the proposed auxiliary problem, the convergence of the numerical solution to the exact solution in the sense of mean is proven.Öğe INVESTIGATION OF ANTIMICROBIAL ACTIVITY AND MORPHOLOGICAL PROPERTIES OF METAL COATED TEXTILE SURFACES(Kharkov Inst Physics & Technology, 2014) Aslan, Necdet; Senturk, Kenan; Sen, Tuba; Coruhlu, Turgay; Varturk, Ipek; Seker, S.; Shahidi, S.The results of investigation antimicrobial and surface properties of the textiles metal coated by means of magnetron or the cleaning-deposition system, which is based on sequentially arranged DC anode layer accelerator and hollow cathode, are presented. The antimicrobial properties against bacteria E. coli and S. aureus of cotton and polyester/cotton textiles coated by Cu, Ti and Ag with the use of two different systems were examined and compared.Öğe INVESTIGATION ON SURFACE, ELECTRICAL AND OPTICAL PROPERTIES OF ITO-AG-ITO COATED GLASS(Kharkov Inst Physics & Technology, 2015) Aslan, Necdet; Sen, Tuba; Coruhlu, Turgay; Senturk, Kenan; Keskin, Sinan; Seker, Sedat; Dobrovolskiy, AndreyThe aim of this work was to study the optical and electrical properties of thick ITO-Ag-ITO multilayer coating onto glass. ITO-Ag-ITO coatings with thickness of ITO layers 110 nm, 185 nm and intermediate Ag layer thickness 40 nm were prepared by magnetron sputtering. The optical, electrical and atomic properties of the coating were examined by scanning electron microscope, atomic force microscope, X-ray diffraction analysis and ultraviolet-visible spectroscopy.Öğe Obtaining plasma parameters by Langmuir probes and optical emission spectroscopy in low-pressure DC plasma(Taylor & Francis Ltd, 2023) Senturk, Kenan; Sen, Tuba; Coruhlu, Turgay; Shahzad, Aamir; Aslan, NecdetThe plasma environment in low-pressure systems allows coating different materials such as glasses, textiles, metals, etc. at the atomic level. Although vacuum coating is one of the best methods for thin film coating, the coating quality is closely affected by the spatial and temporal non-uniformities inside the reactor. Therefore it is quite important to determine the plasma properties within the chamber. The determination of plasma parameters such as electron temperature, electron excitation temperature, electron and ion densities can be realized using Langmuir probe systems, and by Optical Emission Spectroscopy (OES) by using Boltzmann plot method. Knowing such parameters can provide important information about specific reaction mechanisms, as well as it provides invaluable information that can increase reproducibility in various discharge process control in thin film coating. In this study, a homemade single Langmuir probe (s-LP) and a multiple Langmuir probe system (m-LP) were used to calculate electron temperature, electron density, saturation current, and plasma potential of the plasma at different pressures and at different voltages. One of the objectives of this work was to evaluate the electron temperature and ion density inside the plasma during a coating process. The second objective was to find the spatial change of electron temperature in the axial direction between cathode and anode by m-LP system including 8 independent tips. The last objective was to measure the axial plasma electron temperature distribution inside the vacuum chamber by using OES.Öğe OBTAINING USEFUL PROPERTIES OF DIFFERENT MATERIALS BY USING MAGNETRON SPUTTERING(IEEE, 2015) Senturk, Kenan; Sen, Tuba; Coruhlu, Turgay; Varturk, Ipek; Korachi, May; Aslan, Necdet[Abstract Not Available]
