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Articles 1 - 30 of 57
Full-Text Articles in Physics
Establishment Of A Chebyshev-Dependent Inhomogeneous Second Order Differential Equation For The Applied Physics-Related Boubaker-Turki Polynomials, Micahel Dada, O. Bamidele Awojoyogbe, Maximilian Hasler, Karem B. Ben Mahmoud, Amine Bannour
Establishment Of A Chebyshev-Dependent Inhomogeneous Second Order Differential Equation For The Applied Physics-Related Boubaker-Turki Polynomials, Micahel Dada, O. Bamidele Awojoyogbe, Maximilian Hasler, Karem B. Ben Mahmoud, Amine Bannour
Applications and Applied Mathematics: An International Journal (AAM)
This paper proposes Chebyshev-dependent inhomogeneous second order differential equation for the m-Boubaker polynomials (or Boubaker-Turki polynomials). This differential equation is also presented as a guide to applied physics studies. A concrete example is given through an attempt to solve the Bloch NMR flow equation inside blood vessels.
50th Rocky Mountain Conference On Analytical Chemistry
50th Rocky Mountain Conference On Analytical Chemistry
Rocky Mountain Conference on Magnetic Resonance
Final program, abstracts, and information about the 50th annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-endorsed by the Colorado Section of the American Chemical Society and the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Breckenridge, Colorado, July 27-31, 2008.
Peristaltic Pumping Of A Non-Newtonian Fluid, Amit Medhavi
Peristaltic Pumping Of A Non-Newtonian Fluid, Amit Medhavi
Applications and Applied Mathematics: An International Journal (AAM)
The flow induced by sinusoidal peristaltic motion of the tube wall of a non-Newtonian fluid obeying Herschel-Bulkley equation (a general rheological equation that represents a powerlaw, Bingham and Newtonian fluid for particular choice of parameters) under long wavelength and low Reynolds number approximation is investigated. The results obtained for flow rate, pressure drop and friction force are discussed both qualitatively and quantitatively and compared with other related studies. It is found that the pressure drop increases with the flow rate and yield stress but decreases with the increasing amplitude ratio. The flow behaviour index shows significant impact on the magnitude …
Effects Of Finite Layer Thickness On The Differential Capacitance Of Electron Bilayers, J. J. Durrant
Effects Of Finite Layer Thickness On The Differential Capacitance Of Electron Bilayers, J. J. Durrant
McNair Scholars Research Journal
We have calculated the effects of finite thickness on electron or hole layers in double-quantum-well systems. In particular, we apply our model to calculate the Eisenstein ratio and the interlayer capacitance of a biased bilayer device; these are direct measures of the compressibility of the charge carriers in the layers. We show that our model agrees well with the experimental layer-occupancy data for a device of this type. We present results for the regime of negligible interlayer tunneling, zero applied magnetic field, and low layer densities, when the compressibility of one or both layers is negative.
A Call For A Statewide Bioinformatics Institute, John R. Rose
A Call For A Statewide Bioinformatics Institute, John R. Rose
Journal of the South Carolina Academy of Science
No abstract provided.
Sc Inbre: A Catalyst For Biomedical Research Development In South Carolina, Lucia A. Pirisi-Creek M.D, Scott Little, Ph.D.
Sc Inbre: A Catalyst For Biomedical Research Development In South Carolina, Lucia A. Pirisi-Creek M.D, Scott Little, Ph.D.
Journal of the South Carolina Academy of Science
No abstract provided.
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.
Effects Of Opacity On Stellar Radii And Their Relevance To Observational Data, Gülay İnlek, Aysun Böke, Oktay Yilmaz, Edwin Budding
Effects Of Opacity On Stellar Radii And Their Relevance To Observational Data, Gülay İnlek, Aysun Böke, Oktay Yilmaz, Edwin Budding
Turkish Journal of Physics
We have examined the effect of varying opacities on envelope structure with the aid of Paczynski's public domain stellar modelling programs. For this, we prepared new opacity tables from the data of Kurucz [1], using Lagrange interpolation to obtain the tabular values. We compare the results of these Kurucz opacities with similar tabulations from Huebner et al. [2], Iglesias and Rogers [3], Rogers and Iglesias [4] and Iglesias and Rogers [5]. We have checked calculations for the same ranges of stars considered originally by Schwarzschild [6], and compared our findings, using newer opacity data, with those of other sources. We …
The Energy Spectrum Of Two-Electron Semiconductor Quantum Dots, Mohammad K. Elsaid
The Energy Spectrum Of Two-Electron Semiconductor Quantum Dots, Mohammad K. Elsaid
Turkish Journal of Physics
The ground-state properties of a two-dimensional quantum-dot are studied. We have used the shifted 1/N expansion method to solve the relative part Hamiltonian of two electrons confined in a quantum in the presence of an applied uniform magnetic field. The spin singlet-triplet transition in the ground state of the QD is shown. We have also displayed the singlet-triplet energy gap, J = \Delta = E_T - E_S, against the strength of the magnetic field for two electron quantum dot. Based on comparisons, the eigenenergies obtained by the shifted method are in excellent agreement with exact, variational, Hartree-Fock (HF) and Full-Configuration …
Photoelectrochemical Investigations On Hg_Xcd_{1-X}Se Thin Film Electrode/Electrolyte System, Vithal Bhivaba Pujari, L. P. Deshmukh
Photoelectrochemical Investigations On Hg_Xcd_{1-X}Se Thin Film Electrode/Electrolyte System, Vithal Bhivaba Pujari, L. P. Deshmukh
Turkish Journal of Physics
Thin film electrodes of Hg_xCd_{1-x}Se (0 \le x \le 0.2) were prepared in an aqueous alkaline medium (pH \cong 11) on highly conducting stainless steel substrates by chemical bath technique. Use of these films was made as an active photoelectrode in an electrochemical photovoltaic cell, comprising: electrode; sodium polysulphide electrolyte; and impregnated graphite as a counter electrode. The investigations on these cells were made by studying I-V and C-V characteristics in dark, power output, built-in-potential, spectral and photo responses. Cell performance parameters were evaluated: open-circuit photopotential V_{ph}; and short-circuit photocurrent I_{ph}; series and shunt resistances R_{s} and R_{sh}; quantum conversion …
The Asymptotic Iteration Method For The Eigenenergies Of The Complex Potential V(X) = \Gamma X^4 + I \Beta X^3 + I \Alpha X, Abdallah Jamiel Sous
The Asymptotic Iteration Method For The Eigenenergies Of The Complex Potential V(X) = \Gamma X^4 + I \Beta X^3 + I \Alpha X, Abdallah Jamiel Sous
Turkish Journal of Physics
Recently, three complex potentials V(x) = i x^3,V(x) = i x^3 + i \alpha x, and V(x) = x^4 + i \alpha x have been studied in the literature. Here, we combine these potentials in one. With the aid of the asymptotic iteration method we have numerically calculated the eigenenergies of the new complex potential. The obtained numerical results are compared with those obtained by using the WKB, EMM, and MRF methods and found to be in an excellent agreement. We discuss how an adjustable parameter \zeta can help to improve our results.
Two-To-Four Coherent Beams Interference Patterns Of Non-Orthogonal Planes, Ali̇ekber Aktağ
Two-To-Four Coherent Beams Interference Patterns Of Non-Orthogonal Planes, Ali̇ekber Aktağ
Turkish Journal of Physics
In this paper, we present an analysis of intensity distribution of interference pattern of two-to-four linearly polarized plane waves at their intersection in a plane surface. A configuration in which the four plane waves intersect at different angles along four non-orthogonal planes is considered. We show that the shape and the intensity distribution of the interference pattern is strong function of the angles of planes, kinds of polarizations, beam incidence angles. A variety of two-dimensional intensity distribution arrays have been formed by two-to-four beams with differing plane angles, angles of beam incidence and beam polarizations, which may potentially be useful …
Heat Capacity Anomalies Of Tlins_2 And Tlgas_2 Single Crystals Detected By Differential Scanning Calorimetry (Dsc), Muhammed Açikgöz
Heat Capacity Anomalies Of Tlins_2 And Tlgas_2 Single Crystals Detected By Differential Scanning Calorimetry (Dsc), Muhammed Açikgöz
Turkish Journal of Physics
Specific heat capacity C_p anomalies of layered single crystals TlInS_2 and TlGaS_2 have been investigated using differential scanning calorimetry (DSC) as a new technique for such crystals. Special features of C_p have been revealed in the temperature range of the possible phase transitions of both crystals. A sequence of maximum values of C_p is obtained at 163, 174, 184, 193, 201, 212, 224, 254, and 259 K for TlInS_2. In the case of TlGaS_2, the temperatures of the obtained maximum C_p values at 177 and 241 K agree well with the intervals of the phase transition temperatures reported in the …
Characterization Of Thin Film Al/P-Cdte Schottky Diode, M. G. Mahesha, V. B. Kasturi, G. K. Shivakumar
Characterization Of Thin Film Al/P-Cdte Schottky Diode, M. G. Mahesha, V. B. Kasturi, G. K. Shivakumar
Turkish Journal of Physics
A study has been made on the behavior of Al/p-CdTe thin film junction grown by thermal evaporation method. I-V characteristics show that the Al makes Schottky contact with p-CdTe. The variation of junction capacitance with frequency and voltage has been studied to evaluate the barrier height. The activation energy and band gap have been estimated by studying variation of resistivity with temperature. Using all these data, band diagram of Al/p-CdTe has been proposed.
Electronic And Structural Properties Of Zincblende B_Xga_{1-X}N, Abdelhadi Lachebi, Hamza Abid
Electronic And Structural Properties Of Zincblende B_Xga_{1-X}N, Abdelhadi Lachebi, Hamza Abid
Turkish Journal of Physics
We present structural and electronic properties of the cubic structure for different concentrations x of ternary alloy B_xGa_{1-x}N. The computational method is based on the full-potential linearised augmented plane wave method (FP-LAPW). The exchange and correlation energy is described in the local density approximation (LDA) and generalized gradient approximation (GGA). We have investigated the effect of composition on the ground state properties, lattice parameters, bulk modulus, pressure derivative and band gap of the zinc blend BN and GaN. The results obtained are in a good agreement with experimental and theoretical values concerning the variation of the gaps and crossover direct, …
Emc Effect Using Thermodynamical Bag Model, Kuppusamy Ganesamurthy, Raghavan Sambasivam
Emc Effect Using Thermodynamical Bag Model, Kuppusamy Ganesamurthy, Raghavan Sambasivam
Turkish Journal of Physics
The nuclear EMC effect has been evaluated in the entire range of Bjorken variable x for the value of Q^2 = 5 GeV^2 using the phenomenological model known as the Thermodynamical bag model (TBM) and the results have been compared with the experimental values obtained in the deep inelastic scattering by SLAC and BCDMS. Also the values of structure function ratio are obtained as a function of Nachtmann variable \xi , which is used to represent the quark momentum in the Bjorken limit.
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 Study Of Electronic Properties Of The Semi-Conductors Aln And Gan With The Empirical Pseudopotential Method Epm, Kaddour Bencherif, Mohamed Sehil, Hamza Abid, Mohamed Elhadi Louhibi
Theoretical Study Of Electronic Properties Of The Semi-Conductors Aln And Gan With The Empirical Pseudopotential Method Epm, Kaddour Bencherif, Mohamed Sehil, Hamza Abid, Mohamed Elhadi Louhibi
Turkish Journal of Physics
The electronic structure of binary compounds AlN and GaN are presented. We have used the empirical pseudo-potential method. Good agreement between the calculated results and experiment is obtained. The charge densities are presented for the sum of the four valence bands of both AlN and GaN.
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 …
Superconducting State Parameters Of Be-Zr Glassy Alloys, Aditya M. Vora
Superconducting State Parameters Of Be-Zr Glassy Alloys, Aditya M. Vora
Turkish Journal of Physics
The theoretical investigation of the 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 Be_c Zr_{1-c} (c= 0.30, 0.35, 0.40 and 0.45) 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. It is observed that the electron-phonon …
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.
Some Bulk Viscous String Cosmological Models, Ganeshwar Mohanty, Gauranga Charana Samanta
Some Bulk Viscous String Cosmological Models, Ganeshwar Mohanty, Gauranga Charana Samanta
Turkish Journal of Physics
Five dimensional String cosmological models in the presence of variable bulk viscous coefficient, constant bulk viscous coefficient and in the absence of bulk viscosity are constructed and some physical and kinematical behaviors of these models are discussed.
Path Integral Quantization Of Spinning Superparticle, Hanaa A. Elegla, N. I. Farahat
Path Integral Quantization Of Spinning Superparticle, Hanaa A. Elegla, N. I. Farahat
Turkish Journal of Physics
The Hamilton-Jacobi formalism is used to discuss the path integral quantization of a spinning superparticle model. The equations of motion are obtained as total differential equations in many variables. The equations of motion are integrable, and the path integral is obtained as an integration over the canonical phase space coordinates.