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Articles 7741 - 7770 of 10319
Full-Text Articles in Physical Sciences and Mathematics
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 …
Sr And Nd Isotopic Characteristics Of Some S-, I- And A-Type Granitoids From Central Anatolia, Serhat Köksal, M. Cemal Göncüoğlu
Sr And Nd Isotopic Characteristics Of Some S-, I- And A-Type Granitoids From Central Anatolia, Serhat Köksal, M. Cemal Göncüoğlu
Turkish Journal of Earth Sciences
The petrogenesis of some Late Cretaceous S-, I- and A-type granitoids in the Aksaray and Kırşehir regions of Central Anatolia is investigated by means of whole-rock Sr and Nd isotope data with supplementary field, petrographic, and whole-rock geochemical studies. The S-type Central Anatolian granitoids (Sinandı and Namlıkışla) have calc-alkaline peraluminous characteristics and show LILE and LREE enrichment. The I-type Central Anatolian granitoids (Borucu, Terlemez, Hisarkaya, Baranadağ), on the other hand, are calc-alkaline (excepting the alkaline Baranadağ sample) and metaluminous or slightly peraluminous with LILE and LREE enriched patterns and variable Eu-anomalies. Additionally, the A-type Çamsarı granitoid is alkaline and metaluminous …
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 …
Quaternary Calcrete Development In The Mersin Area, Southern Turkey, Muhsi̇n Eren, Selahatti̇n Kadi̇r, Zübeyde Hati̇poğlu, Murat Gül
Quaternary Calcrete Development In The Mersin Area, Southern Turkey, Muhsi̇n Eren, Selahatti̇n Kadi̇r, Zübeyde Hati̇poğlu, Murat Gül
Turkish Journal of Earth Sciences
Quaternary calcretes are widespread in the Mersin area and occur in a variety of forms. Several distinct calcrete profiles are recognized and subdivided into two major groups defined by mature and immature profiles. Mature calcrete profiles comprise a generally isolated calcrete horizon at the base and hard laminated crust at the top with rarely pisolithic crust in the uppermost part. The immature calcrete profiles consist mainly of an isolated calcrete horizon which is rarely overlain by a laminated crust. Calcrete forms show three main stages of development: (i) a mottled or plugged horizon, comprising isolated calcrete forms such as powdery, …
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.
Multiple Period Search For K, M And C Type Semiregular Variables In Tübi̇tak National Observatory, Cahi̇t Yeşi̇lyaprak, Ti̇mur Şahi̇n, Ahmet İskender
Multiple Period Search For K, M And C Type Semiregular Variables In Tübi̇tak National Observatory, Cahi̇t Yeşi̇lyaprak, Ti̇mur Şahi̇n, Ahmet İskender
Turkish Journal of Physics
In this study, periods obtained from long-term multi-bands (Johnson V and R filters) photometric observations of some K, M and C spectral type semiregular (SR) variables obtained with the T40 telescope (40 cm) and SSP5A photometer at TÜBİTAK National Observatory (TNO) between 1998 and 2005 were examined. We have found that some of these SR variables have multiple (long and short) periods as appeared mostly from Hipparcos observations; three variables are, for the first time, observed to have a period. The light curves, the variation amplitude in R band and the maximum light Epoch(s) of SR variables were also given. …
Photo Organic Field Effect Transistor´S Properties, Khasan S. Karimov, Ibrahim N. Ibrahim, M. Mahroof Tahir, Tauseef Ahmed Khan, Umar Shafique
Photo Organic Field Effect Transistor´S Properties, Khasan S. Karimov, Ibrahim N. Ibrahim, M. Mahroof Tahir, Tauseef Ahmed Khan, Umar Shafique
Turkish Journal of Physics
A thin organic films of p-type semiconducting copper phthalocynanine (CuPc) film and semitransparent Al film were deposited in sequence by vacuum evaporation on glass substrate with Ag source and drain electrodes, fabricating an organic field effect transistor with metal (aluminum)-semiconductor (copper phthalocyanine) Schottky junction. The transistor was investigated for effect of illumination on its characteristics. It was found that the gate-source (Al-Ag) and gate-drain (also Al-Ag) dark current-voltage characteristics show rectification behavior. Under non-modulated filament-lamp illumination, photo-potential is developed between gate-source and gate-drain terminals. Drain current of this organic phototransistor (OPT) increased with illumination. An energy band diagram of the …
Stability Effect In Photoconducting Studies Of Some Chemically Deposited Cds, (Cd-Pb)S And (Cd-Zn)S Films, Shashi Bhushan, Tandesh Chandra
Stability Effect In Photoconducting Studies Of Some Chemically Deposited Cds, (Cd-Pb)S And (Cd-Zn)S Films, Shashi Bhushan, Tandesh Chandra
Turkish Journal of Physics
Stability effects in photoconductivity (PC) rise and decay have been studied over a period of 2 years in thin films of (Cd-Pb)S:LiF, La/Pr and (Cd-Zn)S: LiF,La/Pr and have been found quite stable; however, those of CdS are not that stable. Results of annealing effect are also included, which present more stable values. XRD studies show prominent lines of base materials. Further, XRD and SEM studies show the particle sizes are in the nanometer range. Results of optical absorption spectra have been used to evaluate the band gap of the materials. Effect of thickness of the Ag electrode has also been …
Simultaneously Finite Size And Interaction Effects On A Harmonically Trapped ^{87}Rb Gas, Ahmed Sayed Hassan, Hassab Eldyeam Hadi
Simultaneously Finite Size And Interaction Effects On A Harmonically Trapped ^{87}Rb Gas, Ahmed Sayed Hassan, Hassab Eldyeam Hadi
Turkish Journal of Physics
In the framework of the semiclassical approximation (K_B T >> \hbar\Omega), an accurate ansatz formula for the density of states is suggested. This formula is able to include the finite size, interatomic interaction effects, and the role of dimensionality simultaneously. Condensed fraction, and average energy per particle for a condensed ^{87}Rb gas in anisotropic trap in 3D and 2D are calculated. The results for the above mentioned thermodynamic quantities show good agreement with the measured experimental results. Furthermore, full agreement is obtained with the other method used to calculate the same quantities.
The Study Of Copper Zinc Sulphide (Cuzns_2) Thin Films, Chidi Chukwuemeka Uhuegbu, Elisha Bamidele Babatunde, Cornelius O. Oluwafemi
The Study Of Copper Zinc Sulphide (Cuzns_2) Thin Films, Chidi Chukwuemeka Uhuegbu, Elisha Bamidele Babatunde, Cornelius O. Oluwafemi
Turkish Journal of Physics
Thin films of CuZnS_2 were successfully deposited on glass substrates from aqueous solution of copper chloride in which EDTA and TEA were used as complexing agents. The optical and solid state properties were studied include: absorbance, transmittance, reflectance, extinction coefficient, refractive index, absorption coefficient, optical conductivity, dielectric constants. The direct and indirect band gaps obtained ranges from 2.2 eV to 2.4 eV for direct band gap and 0.4 eV to 0.9 eV for indirect band gap. The possible applications were also mentioned.
Investigation Of The Ground State Features Of Some Excotic Nuclei By Using Effective Skyrme Interaction, Hüseyi̇n Ayteki̇n, Eyyüp Tel, Ridvan Baldik
Investigation Of The Ground State Features Of Some Excotic Nuclei By Using Effective Skyrme Interaction, Hüseyi̇n Ayteki̇n, Eyyüp Tel, Ridvan Baldik
Turkish Journal of Physics
Nuclear many-body system is usually described through a mean-field built upon a nucleon-nucleon effective interaction. This interaction has been developed over the years for both stable and unstable nuclei as precise spectroscopic data has been built up. In this study, the proton and neutron densities, charge densities, root mean square (rms) nuclear charge radii, rms nuclear mass radii, rms nuclear proton and neutron radii, and neutron skin thickness were calculated for the neutron-rich Ni, Kr and Sn isotopes by the Hartree-Fock method with an effective Skyrme force based on nucleon-nucleon interactions known as SI, SIII, SVI, T3, SKM and SKM^*. …
Theoretical Investigation Of Superconducting State Parameters Of Binary Metallic Glasses Cu_{1-C}Sn_C, Aditya M. Vora
Theoretical Investigation Of Superconducting State Parameters Of Binary Metallic Glasses Cu_{1-C}Sn_C, Aditya M. Vora
Turkish Journal of Physics
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 seven Cu_{1-c} Sn_c binary metallic glasses have been reported using Ashcroft's empty core (EMC) model potential for the first time. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are used in the present investigation to study the screening influence on the aforesaid properties. The T_C obtained from H-local field correction function are found in qualitative agreement with available experimental data …
Optical And Structural Properties Of The Gas_Xse_{1-X}, Gase, Tlgase_2 And Tlins_2 Semiconductors, Aydin Ulubey Kulibekov
Optical And Structural Properties Of The Gas_Xse_{1-X}, Gase, Tlgase_2 And Tlins_2 Semiconductors, Aydin Ulubey Kulibekov
Turkish Journal of Physics
In the present work, crystal structure and optical properties of the layered chalcogenides GaS_xSe_{1-x}, GaSe, TlGaSe_2 and TlInS_2 were investigated in the visible (VIS) and infrared (IR) range of spectra. Partial content of the elements were performed and the space group were determined by help of X-ray diffraction experiments. Making use of the experimental results, we have constructed a scheme of band motion for the transition from GaSe to GaS. It has been established that that the infrared active optical modes show typical two-mode behaviour. DOI: 10.1007/s10762-005-0294-3, 10.1063/1.2128694
New Exact Traveling Wave Solutions For The Nonlinear Klein-Gordon Equation, Zaiyun Zhang
New Exact Traveling Wave Solutions For The Nonlinear Klein-Gordon Equation, Zaiyun Zhang
Turkish Journal of Physics
In this paper we discuss the nonlinear Klein-Gordon equation and we derive the new traveling wave solutions by applying trigonometric function series method. Also, they are complex linear combinations of kink solitary wave solutions and bell solitary wave solutions.
Fractional Poisson Bracket, Alireza Khalili Golmankhaneh
Fractional Poisson Bracket, Alireza Khalili Golmankhaneh
Turkish Journal of Physics
In the present paper fractional Hamilton-Jacobi equation has been derived for dynamical systems involving the Caputo derivative. Fractional Poisson-bracket is introduced. Further Hamilton's canonical equations are formulated and quantum wave equation corresponds to the fractional Hamilton-Jacobi equation is suggested. Illustrative examples have been worked out to explain the formalism.
The Electrical Resistance Of Mo_{0.5}W_{0.5}S_2 Single Crystal Under Pressure, A. K. Shah, P. N. Gajjar
The Electrical Resistance Of Mo_{0.5}W_{0.5}S_2 Single Crystal Under Pressure, A. K. Shah, P. N. Gajjar
Turkish Journal of Physics
Single crystals of Mo_{0.5}W_{0.5}S_2 were grown by chemical vapour transport and direct vapour transport techniques. The crystals have been characterized by X-ray energy dispersive analysis and X-ray powder diffraction. The dc electrical resistance of the grown single crystals of Mo_{0.5}W_{0.5}S_2 was measured in Bridgman anvil set-up to 8 GPa to identify occurrence of structural phase transitions. The drastic changes in electrical resistance were observed at \sim2.5 GPa and \sim4.6 GPa, and are similar to the structural phase transitions in WS_2 single crystals.
Pressure Induced Phase Transition In Monopnictides Cesb And Lasb, Sadhna Singh, Raja Chauhan, Atul Gour
Pressure Induced Phase Transition In Monopnictides Cesb And Lasb, Sadhna Singh, Raja Chauhan, Atul Gour
Turkish Journal of Physics
In the present paper, monopnictides of Ce and La, which crystallize in B_1 structure, have been studied using effective interaction potential (EIP) approach. The phase transition pressure and volume collapses for CeSb and LaSb predicted from this approach are found to be close to experimental data.
High Field Conduction In Thin Films Of A-(Ge_{.20}{Se0}_{.80})_{1-X}{Pb}_X Glassy Alloys, Rachna Singh, Santosh Kumar
High Field Conduction In Thin Films Of A-(Ge_{.20}{Se0}_{.80})_{1-X}{Pb}_X Glassy Alloys, Rachna Singh, Santosh Kumar
Turkish Journal of Physics
The present paper reports d.c. conductivity measurements at high electric fields in vacuum evaporated amorphous thin films of (Ge_{.20}Se0_{.80})_{1-x}Pb_x (where x = 0, 0.02, 0.04, 0.06 and 0.10) glassy alloys. Current-Voltage (I-V) Characteristics have been measured at various fixed temperatures. In these samples, at low electric fields, ohmic behavior is observed. However, at high electric fields (E \sim 10^4 V/cm), non-ohmic behavior is observed. An analysis of the experimental data confirms the presence of space charge limited conduction (SCLC) in the glassy materials studied in the present case. From the fitting of the data to the theory of SCLC, the …
Five Dimensional Stiff Fluid Models In Lyra Geometry, Ganeshwar Mohanty, Kamal Lochan Mahanta
Five Dimensional Stiff Fluid Models In Lyra Geometry, Ganeshwar Mohanty, Kamal Lochan Mahanta
Turkish Journal of Physics
We have constructed stiff fluid cosmological models in five dimensional space-time based on Lyra geometry. Some physical and geometrical properties of the models are discussed.
Path Integral Evaluation Of A Time-Dependent Oscillator In An External Field, Akpan Ndem Ikot, Eno Etim Ituen, Ime. E. Essien, Louis Ete Akpabio
Path Integral Evaluation Of A Time-Dependent Oscillator In An External Field, Akpan Ndem Ikot, Eno Etim Ituen, Ime. E. Essien, Louis Ete Akpabio
Turkish Journal of Physics
The Lagrangian of a system describing the dynamical behaviour of a time-dependent harmonic oscillator is modified and then used to evaluate the Feynman path integral of the oscillator. The path integral of the time-dependent oscillator is shown to reduce to the time-independent within certain limits.
An Investigation Of Temperature Effect On Phonon Dispersion Spectra Of Ni By Molecular Dynamics Simulation, Sefa Kazanç, Soner Özgen
An Investigation Of Temperature Effect On Phonon Dispersion Spectra Of Ni By Molecular Dynamics Simulation, Sefa Kazanç, Soner Özgen
Turkish Journal of Physics
Lattice vibrations have great influences on physical and mechanical properties of materials. In this study, changes of acoustic phonon frequencies of Ni model system with temperature was investigated by Molecular Dynamic (MD) simulation for [100], [110] and [111] high symmetry directions of the Brillouin zone. To model the interactions between atoms, Sutton-Chen type of Embedded Atom Method (SCEAM) based on many-body interactions were used. The obtained results show that the increase of temperature causes a decrease in longitudinal and transverse acoustic phonon frequencies because of thermal expansion.
Computational Study Of Vibrational Dynamics Of Binary Mg_{0.70}Zn_{0.30} Metallic Glass By A Pseudopotential Theory, Aditya M. Vora
Computational Study Of Vibrational Dynamics Of Binary Mg_{0.70}Zn_{0.30} Metallic Glass By A Pseudopotential Theory, Aditya M. Vora
Turkish Journal of Physics
The vibrational dynamics of Mg_{70}Zn_{30} metallic glass has been studied at room temperature in terms of phonon eigen-frequencies of longitudinal and transverse modes employing three different approaches proposed by Hubbard-Beeby (HB), Takeno-Goda (TG) and Bhatia-Singh (BS). The well-recognized model potential is employed successfully to explain electron-ion interaction in the metallic glass; instead of using experimental values of the pair correlation function g(r), which is generated from the computed pair potential. The present findings of phonon dispersion curve are found in fair agreement with available theoretical as well as experimental data. The thermodynamic properties obtained by HB and TG approaches are …
Electric Dipole Oscillator Strengths Of Boron, Gökhan Tekeli̇, Şule Ateş, Gülteki̇n Çeli̇k
Electric Dipole Oscillator Strengths Of Boron, Gökhan Tekeli̇, Şule Ateş, Gülteki̇n Çeli̇k
Turkish Journal of Physics
Electric dipole oscillator strengths for both individual and multiplet lines between some excited levels of atomic boron are calculated using the Weakest Bound Electron Potential Model Theory (WBEPMT). The Numerical Coulomb Approximation wave functions for expectation values of radii in all states and experimental ionization energies have been employed to determinate the parameters. The obtained results from this work agree very well with the accepted values taken from NIST, Multi-Configurational Hartree-Fock (MCHF) results and atomic line data.
Textural And Compositional Evidence For Magma Mixing In The Evolution Of The Çamlıdere Volcanic Rocks (Galatean Volcanic Province), Central Anatolia, Turkey, Eli̇f Varol, Abi̇di̇n Temel, Alain Gourgaud
Textural And Compositional Evidence For Magma Mixing In The Evolution Of The Çamlıdere Volcanic Rocks (Galatean Volcanic Province), Central Anatolia, Turkey, Eli̇f Varol, Abi̇di̇n Temel, Alain Gourgaud
Turkish Journal of Earth Sciences
The Çamlıdere area, in the Galatean Volcanic Province (Ankara), Turkey, is composed of rhyolitic, andesitic, trachytic, dacitic and locally basaltic rocks. The older volcanic rocks in the studied area are rhyolitic and the younger ones basaltic. The phenocrysts from all the volcanic rocks exhibit some petrographic disequilibrium features such as: (a) coexistence of reversely, normally and oscillatory zoned sieved or unsieved plagioclase in the same rock; (b) wide compositional variation of An% in feldspar phenocrysts; (c) sieved, unsieved, normally and reversely zoned pyroxenes occur together in a single rock; (d) some orthopyroxene phenocrysts are surrounded by clinopyroxene; (e) reaction textures, …
Nonexistence Of Stable Exponentially Harmonic Maps From Or Into Compact Convex Hypersurfaces In R^{M+1}, Jiancheng Liu
Nonexistence Of Stable Exponentially Harmonic Maps From Or Into Compact Convex Hypersurfaces In R^{M+1}, Jiancheng Liu
Turkish Journal of Mathematics
In this paper, we study the nonexistence problems for stable exponentially harmonic map into or from compact convex hypersurface M^m \subset R^{m+1}, and show that every nonconstant exponentially harmonic map f, between M^m and any compact Riemannian manifold, is unstable if (4) holds.