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Superconducting State Parameters Of Al-Li Binary Alloys, Aditya M. Vora
Superconducting State Parameters Of Al-Li Binary Alloys, Aditya M. Vora
Turkish Journal of Physics
Theoretical computation of superconducting state parameters (SSP) viz. electron-phonon coupling strength \lambda , Coulomb pseudopotential \mu^* , transition temperature T_C , isotope effect exponent \alpha and effective interaction strength N_o V of face centered cubic Al_{1-C} Li_C binary alloys have been made extensively in the present work using a model potential formalism for the first time. A considerable influence of various exchange and correlation functions on \lambda and \mu^* is found from the present study. The present results of the SSP are found in qualitative agreement with the available experimental data wherever exist.
Combined Analysis Of Solar Neutrino Data Within The Rsfp Framework Together With New Kamland Data, Deni̇z Yilmaz
Combined Analysis Of Solar Neutrino Data Within The Rsfp Framework Together With New Kamland Data, Deni̇z Yilmaz
Turkish Journal of Physics
A combined analysis of solar neutrino data together with the new KamLAND data is presented in the RSFP framework. It is investigated how the allowed regions are effected from the new KamLAND data at different \mu B values. Limits on \mu B value is found at the different confidence level intervals.
Asphericity In The Fermi Surface Of D And F-Shell Metals, J. K. Baria, A. R. Jani
Asphericity In The Fermi Surface Of D And F-Shell Metals, J. K. Baria, A. R. Jani
Turkish Journal of Physics
Recently proposed pseudopotential has been used to calculate asphericity in the Fermi surface of d and f-shell metals along the three symmetry directions [100], [110] and [111]. The parameter of the potential has been determined by zero pressure condition and the exchange and correlation function due to Taylor has been incorporated. The present results are in good agreement with experimental findings for Cu, Ag, Au and Pd; while for other d and f- shell metals we could not found sufficient theoretical as well as experimental data for the asphericity in the Fermi Surface in order to workout a quantitative comparison. …
Production Of Ybco Superconductor Sample By Powder-In-Tube Method (Pitm); And Effect Of Cd And Ga Doping On The System, Serkan Alagöz
Production Of Ybco Superconductor Sample By Powder-In-Tube Method (Pitm); And Effect Of Cd And Ga Doping On The System, Serkan Alagöz
Turkish Journal of Physics
In this study, YBa_2Cu_3O_{7-\delta} and Y_{0.5}X_{0.5}Ba_2Cu_3O_{7-\delta} (x = Ga, Cd) compounds are produced by Powder-In-Tube Method and electrical and physical characteristics of those samples were investigated. Following 3, 5 and 9 tons pressure applied to three sample groups (YBa_2Cu_3O_{7-\delta}, Y_{0.5}Cd_{0.5}Ba_2Cu_3O_{7-\delta}, Y_{0.5}Ga_{0.5}Ba_2Cu_3O_{7-\delta}), samples were examined via X-Ray diffraction, resistivity and SEM measurement. Considerable changes in Crystallographic properties of the YBCO samples, produced by using Powder-In-Tube Method for different pressure values, were observed. Under different magnetic fields conditions, resistance of the YBCO samples was measured and it was seen that samples had very pure and homogenous structure. Ga doping into YBCO composition …
Electrical Characterization And Relaxation Behavior Of Lithium-Indium-Phosphate Glasses Via Impedance Spectroscopy, M. V. N. V. D. Sharma, A. V. Sarma, R. Balaji Rao
Electrical Characterization And Relaxation Behavior Of Lithium-Indium-Phosphate Glasses Via Impedance Spectroscopy, M. V. N. V. D. Sharma, A. V. Sarma, R. Balaji Rao
Turkish Journal of Physics
Phosphate glasses with various compositions of lithium oxide and indium oxide were synthesized by melt quenching technique. The glass forming ability parameter K_{gl} was characterized by differential thermal analysis. The electrical measurements for all the glass samples were carried out in the frequency range of 10 Hz to 10^{6} Hz and at a temperature range of 393-513 K by the Impedance spectroscopy. Frequency dependent conductivity follows the power law. The ac conductivity increases with temperature following the Arrhenius law. Master curve in the scaling analysis suggesting the temperature independent conduction relaxation mechanism.
Generation Of Ultrafast Bright And Dark Pulse On Silicon Chip With Integrated Mach-Zehnder Interferometer Configuration, Jianwei Wu, Fengguang Luo
Generation Of Ultrafast Bright And Dark Pulse On Silicon Chip With Integrated Mach-Zehnder Interferometer Configuration, Jianwei Wu, Fengguang Luo
Turkish Journal of Physics
In this paper we propose and simulate ultrafast femtosecond bright and dark pulses, obtained simultaneously at the same center wavelength, based on silicon-on-insulator (SOI) waveguides in Mach-Zehnder interferometer (MZI) configuration; the ultrafast pulsed pump is injected into one MZI's arm and a continuous wave component (CW) is divided equally into the two MZI arms. Numerical results show that properties of the generated bright and dark pulses are strongly dependent on the launching optical powers of both the pump pulse and CW carriers, and on the waveguide length.
Unsteady Free Convection Flow With Thermal Radiation Past A Vertical Porous Plate With Newtonian Heating, Promise Mebine, Emmanuel Munakurogha Adigio
Unsteady Free Convection Flow With Thermal Radiation Past A Vertical Porous Plate With Newtonian Heating, Promise Mebine, Emmanuel Munakurogha Adigio
Turkish Journal of Physics
This paper considers exact solutions of unsteady free convection flow with thermal radiation past a vertical porous plate with Newtonian heating. The technique of Laplace transform was employed in deriving the solutions to the governing flow and energy equations. A parametric study of all parameters involved was conducted, and a representative set of results showing the effect of the radiation parameter N, the ratio of uniform suction to characteristic velocity parameter R, and the free convection parameter Gr on the velocity and temperature are illustrated graphically. The skin friction or shear and heat flux are discussed quantitatively. It is evident …
Composition Dependent Of Dielectric Properties In Se_{100-X}Pb_X Glassy Alloys, Jyoti Sharma, Santosh Kumar
Composition Dependent Of Dielectric Properties In Se_{100-X}Pb_X Glassy Alloys, Jyoti Sharma, Santosh Kumar
Turkish Journal of Physics
In this paper we report the composition dependent of dielectric properties in Se_{100-x}Pb_x (x = 0, 2, 4, 6 and 10) glassy alloys. The temperature and frequency dependence of the dielectric constants and the dielectric losses in the above glassy systems in the frequency range 1 kHz-5 MHz and temperature range 300-340 K have been measured. It has been found that dielectric constant and the dielectric loss both are highly dependent on frequency and temperature and also found to be increased with increasing concentration of Pb in pure amorphous Se. The results have been interpreted in terms of increase in …
The Electrical Conduction Mechanisms And Thermoelectric Power Of Snse Single Crystals, M. M. Nassary
The Electrical Conduction Mechanisms And Thermoelectric Power Of Snse Single Crystals, M. M. Nassary
Turkish Journal of Physics
Single crystals of SnSe were prepared in our laboratory by a special modified Bridgman technique. Measurements of the electrical conductivity and Hall effect between 141 K and 553 K were carried out on SnSe sample in two crystallographic directions. The investigated sample was found to be of p-type conductivity. The Hall mobilities parallel and perpendicular to layers plane at room temperature, were 7835.9 cm^2/ V \cdots and 7274.7 cm^2/ V.s, respectively. The free carrier concentration P = 3.52 \times 10^{12} cm^{-3} at room temperature. Also, the thermoelectric power (TEP) was investigated in the temperature range from 176 to 553 K. …
Growth And Microindentation Analysis Of Pure And Doped Sb_2se_3 Crystals, K. A. Chandrasekharan, A. G. Kunjomana
Growth And Microindentation Analysis Of Pure And Doped Sb_2se_3 Crystals, K. A. Chandrasekharan, A. G. Kunjomana
Turkish Journal of Physics
Pure and doped antimony selenide (Sb_2Se_3, Sb_2Se_{2.8}Te_{0.2}, and Sb_2Se_{2.6}Te_{0.4}) crystals have been grown from melt by the Bridgman Stockbarger method. X-ray powder diffraction analysis was carried out to determine the lattice parameters of the grown samples. The morphology of cleavage planes was observed using SEM. Energy dispersive analysis by X-rays (EDAX) was done to find out the chemical composition of the grown samples. Correlation of microhardness with other mechanical characteristics such as toughness, brittleness, and yield strength, has been investigated. The effects of Te doping on the mechanical behaviour and energy gap were also studied on the cleavage faces.
Thermoelectric Power And Low-Field Electron Mobility In Al_Xga_{1-X}N Lattice-Matched To Gan, H. Arabshahi
Thermoelectric Power And Low-Field Electron Mobility In Al_Xga_{1-X}N Lattice-Matched To Gan, H. Arabshahi
Turkish Journal of Physics
The results of thermoelectric power and electron drift mobility in Al_xGa_{1-x}N lattice-matched to GaN are calculated for different temperatures, free-electron concentrations and compositions. The two-mode nature of the polar optic phonons is considered jointly with deformation potential acoustic, piezoelectric, alloy and ionized-impurity scattering. Band non-parabolicity, admixture of p functions, arbitrary degeneracy of the electron distribution and the screening effects of free carriers on the scattering probabilities are incorporated. The Boltzmann equation is solved by an iterative technique using the currently established values of the material parameters. The iterative results are in fair agreement with other recent calculations obtained using the …
Study Of Second-Class Currents Effects On Polarization Characteristics In Quasi-Elastic Neutrino (Anti-Neutrino) Scattering By Nuclei, Adamou Ousmane Manga, Almoustapha Aboubacar
Study Of Second-Class Currents Effects On Polarization Characteristics In Quasi-Elastic Neutrino (Anti-Neutrino) Scattering By Nuclei, Adamou Ousmane Manga, Almoustapha Aboubacar
Turkish Journal of Physics
The differential cross section of quasi-elastic neutrino scattering by nuclei is computed. The numerical analysis of energy dependence of the spin asymmetry, the angular electron-neutrino (e\nu) correlation and the charge asymmetry coefficients shows that the relative contribution of the second-class current (SCC) tensor form factor can reach some tens of percents in the case of particular values of final nuclei alignment and polarization.
Behavior Of Transition Amplitude And Evolution Of The Energy Of Quantum Kicked Rotator, Abdolrasoul Gharaati
Behavior Of Transition Amplitude And Evolution Of The Energy Of Quantum Kicked Rotator, Abdolrasoul Gharaati
Turkish Journal of Physics
I give certain analytical properties of quantum kicked rotators, both theoretic and observed from computation. I give an expression for the wave function between two successive impulses. An element of the transition matrix, the matrix that takes the wave function from one impulse to another, exponentially falls away from the main diagonal. The decay parameter is given for a few special cases of a periodic potential. Finally, the transition matrix is used to derive the time evolution of the energy for periodic cases and for fundamental resonances. The empirical expressions of Dorizzi et al. are compatible with our analytical results.
Determination Of Soil Loss By ^{137}Cs Fallout Radionuclide In Ömerli Watershed Of İstanbul, Turkey, Muhammet Sahi̇p Kiziltaş, Sevi̇lay Haciyakupoğlu, Ferhat Gökbulak, Ahmet Hizal
Determination Of Soil Loss By ^{137}Cs Fallout Radionuclide In Ömerli Watershed Of İstanbul, Turkey, Muhammet Sahi̇p Kiziltaş, Sevi̇lay Haciyakupoğlu, Ferhat Gökbulak, Ahmet Hizal
Turkish Journal of Agriculture and Forestry
Soil erosion and sedimentation in watersheds are usually part of the information to be considered for soil and water conservation measures. Soil loss is generally estimated with models or measured with plot studies. Although fallout radionuclides (FRN) methodology provides a powerful technique for predicting the impacts of proposed land management strategies on soil erosion and sediment yield within river basins and estimates erosion based on fallout radioisotopes (Cs-137, Pb-210, Be-7) radioactivity, it is rarely used in Turkey. The aim of this study was to determine soil losses from different land use types with FRN's methodology by using caesium-137 radionuclide in …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Fresh And Brackish Water Ostracods Of Upper Miocene Deposits, Arguvan/Malatya (Eastern Anatolia), Ati̇ke Nazi̇k, İbrahi̇m Türkmen, Cali̇be Koç, Ercan Aksoy, Ni̇yazi̇ Avşar, Hülya Yayik
Fresh And Brackish Water Ostracods Of Upper Miocene Deposits, Arguvan/Malatya (Eastern Anatolia), Ati̇ke Nazi̇k, İbrahi̇m Türkmen, Cali̇be Koç, Ercan Aksoy, Ni̇yazi̇ Avşar, Hülya Yayik
Turkish Journal of Earth Sciences
The Neogene Alibonca, Küseyin, Parçikan, Boyaca formations and the Mamaar volcanic unit occur at Arguvan (Malatya, Eastern Anatolia). Nine species of ostracods were identified and assigned to four genera in samples collected from the Küseyin and Parçikan formations. The faunal content in these units was characterized by few ostracod species and abundant individuals. Most samples contained fewer than nine species. Ilyocypris bradyi, Ilyocypris gibba, Candona parallela pannonica and Heterocypris salina are described in the Küseyin Formation. Cyprideis pannonica, Cyprideis anatolica, Cyprideis torosa, Ilyocypris gibba, Candona angulata, Candona neglecta, Candona parallela pannonica and Heterocypris salina are described in Parçikan Formation. Cyprideis, …
Geochemistry And Tectonic Environment Of Diverse Magma Generations Forming The Crustal Units Of The Kızıldağ (Hatay) Ophiolite, Southern Turkey, Utku Bağci, Osman Parlak, Volker Höck
Geochemistry And Tectonic Environment Of Diverse Magma Generations Forming The Crustal Units Of The Kızıldağ (Hatay) Ophiolite, Southern Turkey, Utku Bağci, Osman Parlak, Volker Höck
Turkish Journal of Earth Sciences
The Kızıldağ (Hatay) ophiolite is one of the best preserved Neotethyan oceanic lithospheric remnants in southern Turkey. It is represented by, from bottom to top, mantle tectonites, ultramafic to mafic cumulates, isotropic gabbros, sheeted dike complex, plagiogranites and extrusives (low-K tholeiites and boninites). The ultramafic to mafic cumulate rocks are composed of dunite, wehrlite, olivine gabbro, olivine gabbronorite and gabbro. The crystallization order of cumulus phases, and the presence of highly magnesian olivines and pyroxenes as well as highly calcic plagioclases in the cumulates, indicate a subduction-related tectonic environment and suggest derivation from an island arc tholeiitic magma. The isotropic …
Late Cenozoic Sedimentary Evolution Of The Antalya Basin, Southern Turkey, Atti̇la Çi̇ner, Mustafa Karabiyikoğlu, Olivier Monod, Max Deynoux, Sevi̇m Tuzcu
Late Cenozoic Sedimentary Evolution Of The Antalya Basin, Southern Turkey, Atti̇la Çi̇ner, Mustafa Karabiyikoğlu, Olivier Monod, Max Deynoux, Sevi̇m Tuzcu
Turkish Journal of Earth Sciences
The Late Cenozoic Antalya Basin developed unconformably on a foundered basement comprising Mesozoic autochthonous carbonate platform(s) overthrust by the Lycian Nappes, the Antalya Nappes and the Alanya Massif metamorphics within the Isparta Angle, southern Turkey. The present configuration of the basin consists of three distinct parts, referred herein as the Aksu, Köprüçay and Manavgat sub-basins, respectively, which are divided by the north-south-trending Kırkkavak Fault and the westward-verging Aksu Thrust. The Miocene fill of each sub-basin is characterized by thick accumulations of non-marine to marine clastics with locally developed coralgal reefs and reefal shelf carbonates. Based on lithostratigraphic and chronostratigraphic considerations, …
Palaeoenvironmental Investigation Of Sapropelic Sediments From The Marmara Sea: A Biostratigraphic Approach To Palaeoceanographic History During The Last Glacial-Holocene, Elmas Kirci Elmas, Oya Algan, İzver Özkar Öngen, Ulrich Struck, Alexander V. Altenbach, Eni̇s K. Sagular, Ati̇ke Nazi̇k
Palaeoenvironmental Investigation Of Sapropelic Sediments From The Marmara Sea: A Biostratigraphic Approach To Palaeoceanographic History During The Last Glacial-Holocene, Elmas Kirci Elmas, Oya Algan, İzver Özkar Öngen, Ulrich Struck, Alexander V. Altenbach, Eni̇s K. Sagular, Ati̇ke Nazi̇k
Turkish Journal of Earth Sciences
High-resolution micropalaeontological examination of two cores recovered from the Central Basin of the Marmara Sea distinguishes seven biostratigraphical zones within pre-sapropelic (Pr1 & 2 zones), sapropelic (Sap1 & 2 zones) and post-sapropelic (Po1-2-3 zones) sediments. The pre-sapropelic sediments at the basal section of the cores reflect the lake stage of the Marmara Sea when it was isolated both from the Black and Mediterranean seas. First colonization of foraminifers at about 11-10.4 ky BP indicate the beginning of marine conditions following the entry of Mediterranean waters through the Çanakkale Strait. Sapropelic sediments deposited at about 10.3-6.2 ky BP were associated with …
Petrology And ^{40}Ar-^{39}Ar Age Of The Bimodal Orduzu Volcanics (Malatya) From The Western End Of The Eastern Anatolian Neogene Volcanism, Turkey, Ayten Önal, Durmuş Boztuğ, Mehmet Arslan, Terry L. Spell, Sevcan Kürüm
Petrology And ^{40}Ar-^{39}Ar Age Of The Bimodal Orduzu Volcanics (Malatya) From The Western End Of The Eastern Anatolian Neogene Volcanism, Turkey, Ayten Önal, Durmuş Boztuğ, Mehmet Arslan, Terry L. Spell, Sevcan Kürüm
Turkish Journal of Earth Sciences
The Orduzu volcanics, which are part of the Yamadağ volcanics in the Malatya region, include rhyolite, rhyolitic dykes, trachyandesite and basaltic trachyandesitic dykes. Mafic globular occurrences within the basaltic trachyandesitic dykes, the existence of basaltic trachyandesite enclaves within the trachyandesite, and other textural and geochemical evidence all indicate magma mingling/mixing. Incremental ^{40}Ar-^{39}Ar dating on plagioclase from the rhyolite, from rhyolite dykes and basaltic trachyandesite yielded consistently 16 Ma (Middle Miocene). Primordial mantle-normalized spider diagrams of the rhyolite and rhyolitic dykes represent enrichments in some large ion lithophile elements (Cs, Rb, Ba, K, Th, U) but remarkably depletion in Sr, Nb, …
A First Record Of A Strike-Slip Basin In Western Anatolia And Its Tectonic Implication: The Cumaovası Basin, Bora Uzel, Hasan Sözbi̇li̇r
A First Record Of A Strike-Slip Basin In Western Anatolia And Its Tectonic Implication: The Cumaovası Basin, Bora Uzel, Hasan Sözbi̇li̇r
Turkish Journal of Earth Sciences
The Cumaovası basin, formerly known as the Çubukludağ Graben, is located at the western end of Gediz and Küçük Menderes grabens in the west Anatolian extensional province. It is 5-17-km wide and 35-km-long, NNE-SSW-trending, asymmetric basin that was formed under the control of strike-slip and oblique-slip normal faults. The basin contains two different infills that are separated by an angular unconformity: (1) an ancient basin fill consisting of Lower Miocene-Lower Pliocene sequences which accumulated in a fluvio-lacustrine depositional setting, and deformed by NE-SW-trending strike-slip faulting; and (2) a modern basin fill consisting of Plio-Quaternary units that are controlled by synchronous …
New Chemical Weathering Indices For Estimating The Mechanical Properties Of Rocks: A Case Study From The Kürtün Granodiorite, Ne Turkey, Şener Ceryan
Turkish Journal of Earth Sciences
The chemical weathering of rock proceeds by water-rock interaction. During weathering geochemically mobile elements, alkali and alkali-earth elements are easily leached from rocks, leaving the residual elements to combine with components from the atmosphere to form new minerals. No single weathering index given in the literature fits the model of the process involved in chemical weathering outlined above. This study deals with the derivation of three new chemical weathering indices by taking both chemical processes such as leaching and new mineral formation into account. The new indices are chemical leaching index (CLI), chemical weathering product index (CWPI) and total chemical …
Timidonella? Primitiva N. Sp. (Foraminiferida) From The Middle Jurassic Of The Eastern Taurides (Southern Turkey): Remarks On Evolutionary Steps Of Hauraniids, Erkan Ekmekci̇, Demi̇r Altiner
Timidonella? Primitiva N. Sp. (Foraminiferida) From The Middle Jurassic Of The Eastern Taurides (Southern Turkey): Remarks On Evolutionary Steps Of Hauraniids, Erkan Ekmekci̇, Demi̇r Altiner
Turkish Journal of Earth Sciences
A new species of complex benthic foraminifera, Timidonella? primitiva n.sp., has been identified from the Aalenian?-Bajocian of the eastern Taurides, Turkey. The new species, belonging to the family Hauraniidae SEPTFONTAINE, occurs in the lowermost beds of the Köroğlutepesi Formation and its test is composed of a planispirally coiled early stage followed by an uncoiled rectilinear portion. The internal structure is characterized by four different zones consisting of a subepidermal reticulate layer, a zone of subepidermal plates, a more internal empty zone in the chambers and a primitive interseptal pillar system in the most internal part of the chambers perforated by …
On The First Law Of Thermodynamics For (2+1) Dimensional Charged Btz Black Hole And Charged De Sitter Space, Eduard Alexis Larrañaga
On The First Law Of Thermodynamics For (2+1) Dimensional Charged Btz Black Hole And Charged De Sitter Space, Eduard Alexis Larrañaga
Turkish Journal of Physics
In this paper we will show that using the cosmological constant as a new thermodynamical state variable, the differential and integral mass formulas of the first law of thermodynamics for asymptotic flat spacetimes can be extended to (2+1) dimensional charged BTZ black holes and charged de Sitter space.