Yayın tarihi için FEF, Fizik Bölümü Koleksiyonu listeleme
Toplam kayıt 320, listelenen: 41-60
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Effects of Meissner surface current on the microwave surface resistance of type-II superconductors
(Elsevier, 2010)Influence of the Meissner current on the field-induced variations of the microwave (mw) surface resistance in type-II superconductors is demonstrated to be well reproduced by exploiting different critical state models. ... -
CdTe thin film solar cells prepared by a low-temperature deposition method
(Wiley, 2010)Low-temperature vacuum deposition instead of the commonly used vacuum deposition at high substrate temperatures has been applied to prepare high efficiency (CdS/CdTe) solar cells. CdS and CdTe thin films have been subsequently ... -
Radiological and chemical assessment of phosphate rocks in some countries
(Elsevier, 2010)In this study, the radiological, structural and chemical characterizations of Mardin-Mazi{dotless}da?i{dotless} phosphate rock, which is an important phosphate fertilizer source in Turkey were investigated and compared to ... -
Irreversibility line and flux relaxation in Bi:2223/Ag tape prepared by CTFF technique: H//c axis
(Springer Link, 2010)We have studied flux dynamics in Bi:2223/Ag tape prepared by the CTFF technique in the orientation of H//c axis. Irreversibility line (IL) of a Bi:2223/Ag tape has been determined from AC susceptibility and the DC magnetization ... -
Hydrogen production system design with synchronous buck converter
(IEEE, 2010)Nowadays, the growing energy needs and the decreasing fossil fuels have made inevitable the use of new and renewable energy. The high cost of the renewable energy sources led to the need to develop more efficient and cheaper ... -
Efficient calculation of boys integrals
(2010)An efficient procedure has been presented for the calculation of Boys integrals by dividing the integral region [0, 1] into several parts. The obtained formula includes factorials, exponentials and a well known auxiliary ... -
The influence of substrate temperature on electrical properties of Cu/CdS/SnO2 Schottky diode
(Elsevier, 2011)Polycrystalline CdS samples on the SnO2 coated glass substrate were obtained by vacuum evaporation method at low substrate temperatures (T S=200 and 300 K) instead of the commonly used vacuum evaporation at high substrate ... -
A novel photovoltaic PV-powered battery charging scheme for electric vehicles
(IEEE, 2011)The paper presents a novel photo-voltaic PV powered battery charging station. The flexible scheme developed by the first Author is controlled by a FACTS-based Green Plug-Filter Compensator GPFC to ensure efficient utilization ... -
Gamma ray and neutron shielding properties of some concrete materials
(Elsevier, 2011)Shielding of gamma-rays and neutrons by 12 concrete samples with and without mineral additives has been studied. The total mass attenuation and linear attenuation coefficients, half-value thicknesses, effective atomic ... -
Numerical analysis for remote identification of materials with magnetic characteristics
(IEEE, 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 ... -
Annual effective dose and concentration levels of gross α and β in various waters from Samsun, Turkey
(Elsevier, 2011)Samsun city which is between the deltas where YeŞilirmak and Kizilirmak rivers run out, exists in the middle part of Black Sea's costal way. It is the biggest city of the Black Sea Region in terms of population, industry, ... -
Determination of mass attenuation coefficients for natural minerals from different places of Turkey
(2011)The mass attenuation coefficients (?m) for some natural minerals taken from different places of Turkey were measured at various low photon energies. The Am-241 radioactive source and Zr and Cd secondary exciter are used ... -
Radionuclides and heavy metals concentrations in Turkish market tea
(Elsevier, 2011)Tea is one of the most popular beverages in the world. The Eastern Black Sea Region of Turkey is one of the main tea producers in Turkey and the fifth in the world. Thus, the chemical components in tea have received great ... -
Molecular integrals over slater-type orbitals. From pioneers to recent developments
(Nova Science Publishers, Inc., 2011)It can readily be demonstrated that atomic and molecular orbitalsmust decay exponentially at long-range. They should also possess cusps when two particles approach each other. Therefore, Slater orbitals are the natural ... -
Spectrum analyzer measurement technique for safety evaluation on wireless communication systems
(IEEE, 2011)In this paper, general information about, unionized radiation, wireless communication systems and electromagnetic fields are given. The safety of mobile phones has been evaluated in terms of specific absorption ratio (SAR). ... -
Preparation and characterization of new window material CdS thin films at low substrate temperature (<300 K) with vacuum deposition
(Elsevier, 2011)Low-temperature vacuum deposition instead of the commonly used vacuum deposition at high substrate temperatures has been applied to prepare new window material CdS thin films. The structural, optical and electrical properties ... -
Effect of CdCl2/annealing on the crystalline transformation of CdTe thin films grown by evaporation at a low substrate temperature
(TÜBİTAK, 2011)The structural and optical properties of CdTe thin films prepared at a low substrate temperature were investigated before and after the CdCl 2/annealing. The crystal structure of CdTe film was cubic with a strong (111) ... -
Radionuclide concentration in tea, cabbage, orange, kiwi and soil and lifetime cancer risk due to gamma radioactivity in Rize, Turkey
(Wiley, 2011)BACKGROUND: In this study, the activity concentrations of 232Th, 238U, 40K and 137Cs were measured in tea, cabbage, orange, kiwi and soil samples collected from different stations using gamma spectrometry with a high-purity ... -
Fuzzy logic controlled buck-boost DC-DC converter for solar energy-battery system
(IEEE, 2011)In this paper, a Fuzzy Logic Controlled (FLC) buck-boost DC-DC converter for solar energy-battery systems is presented. General design of a fuzzy logic controller (FLC), based on Matlab/Simulink is performed. This design ... -
Study of microwave surface resistance of type-II superconductors carrying transport current
(Wiley, 2011)We investigate the microwave surface resistance of an infinitely long type-II superconductor in the critical state carrying transport DC current, in the absence and in the presence of external magnetic fields. Calculations ...