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Ac Conductivity And Ultrasonic Studies In Khco_3 Compound, Fathy Salman, Sayed Abouelhassan, Eslam Sheha, Mabrouk Elmansy
Ac Conductivity And Ultrasonic Studies In Khco_3 Compound, Fathy Salman, Sayed Abouelhassan, Eslam Sheha, Mabrouk Elmansy
Turkish Journal of Physics
The total conductivity of KHCO_3 compound is studied in the frequency range 50 Hz-1 MHz and in the temperature range 300-370 K. The conductivity frequency dependence relation is divided into three regions: one at low frequency (dc conductivity), while the others appear at a moderate and relatively higher frequency range. In general, the conductivity frequency dependence conductivity obeys a double power law relation, \sigma_{tot} = \sigma_{dc} + A\omega^p + B\omega^q. The powers p and q have been found to be in the range 0 to 1 and 1 to 2, respectively. The attenuation coefficient \beta of KHCO_3 compound was studied …
Nonlinear Two-Mode Squeezed Vacuum States As Realization Of Su(1,1) Lie Algebra, Gamal Mohamed Abd Al-Kader, Abdel-Shafy Fahmy Obada
Nonlinear Two-Mode Squeezed Vacuum States As Realization Of Su(1,1) Lie Algebra, Gamal Mohamed Abd Al-Kader, Abdel-Shafy Fahmy Obada
Turkish Journal of Physics
Nonlinear extensions of the two-mode squeezed vacuum states (NTMSVS's) are constructed and special cases of these states are discussed. We have constructed the NTMSVS's realization of SU(1,1) Lie algebra. Two cases of the definition are considered for unitary and non-unitary deformation operator functions. Some nonclassical properties of these states are discussed.
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.
Stability Of Hickson Groups Of Galaxies, Ibrahim Selim, Naseer Iqbal
Stability Of Hickson Groups Of Galaxies, Ibrahim Selim, Naseer Iqbal
Turkish Journal of Physics
In this work we have used the Viril theorem to investigate the dynamical stability of Hickson compact groups of galaxies. The average luminous mass of the galaxies member is approximately 1.3 \times 0^{11} M_{\odot} and average total luminous mass of group is approximately 4.6 \times 0^{11} M_{\odot}. The virial theorem has used to estimate the virial mass. The average Virial mass of group of galaxies is approximately 6.3 \times 0^{13} M_{\odot} This is attributed to the presence of large amount of dark matter which is more than 90% in this group. Hickson compact groups of galaxies are unstable system due …
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.
High Pressure Phase Transition Of Copper Halides, Deoshree Baghmar, Neeraj Kumar Gaur, Sadhna Singh, Dinesh Chandra Gupta
High Pressure Phase Transition Of Copper Halides, Deoshree Baghmar, Neeraj Kumar Gaur, Sadhna Singh, Dinesh Chandra Gupta
Turkish Journal of Physics
The structural changes within copper halides induced by pressure from zinc-blend to rock-salt passing through an intermediate tetragonal structure have been investigated using an effective interionic interaction potential. The values of the phase transition pressures obtained by us for the copper halides are in good agreement with their available experimental data. We have also investigated the equation of state, which shows an appreciable volume collapses at the phase transition pressures.
Ergodicity Conditions In A Simple Best Effort Queueing Networks, Abdeldjebbar Kandouci, Abdelmadjid Ezzine, Toufik Guendouzi
Ergodicity Conditions In A Simple Best Effort Queueing Networks, Abdeldjebbar Kandouci, Abdelmadjid Ezzine, Toufik Guendouzi
Turkish Journal of Mathematics
No abstract provided.
Semi-Slant Submanifolds Of A Nearly Kaehler Manifold, Viqar Azam Khan, Meraj Ali Khan
Semi-Slant Submanifolds Of A Nearly Kaehler Manifold, Viqar Azam Khan, Meraj Ali Khan
Turkish Journal of Mathematics
The aim in the present paper is to study some basic geometric properties of semi-slant submanifolds of a nearly Kaehler manifold.
On Cartan Spaces With (\Alpha, \Beta)-Metric, H. G. Nagaraja
On Cartan Spaces With (\Alpha, \Beta)-Metric, H. G. Nagaraja
Turkish Journal of Mathematics
É. Cartan [2] has originally introduced a Cartan space, which is considered as dual of Finsler space. H. Rund [10], F. Brickell [1] and others studied the relation between these two spaces. The theory of Hamilton spaces was introduced and studied by R. Miron ([8 , [9]). He proved that Cartan space is a particular case of Hamilton space. T. Igrashi ([5], [6]) introduced the notion of the (\alpha, \beta)-metric in Cartan spaces and obtained the metric tensor and the invariants \rho and r which characterize the special classes of Cartan spaces with (\alpha, \beta)-metric. This paper presents a study …
The Compact Metric Space Of The Lattice Of Varieties And ^{*}-Varieties Of C^{*}-Algebras, G. Khalilzadeh, Mohammad Hasan Faroughi
The Compact Metric Space Of The Lattice Of Varieties And ^{*}-Varieties Of C^{*}-Algebras, G. Khalilzadeh, Mohammad Hasan Faroughi
Turkish Journal of Mathematics
Variety of Banach algebras is a non-empty class of Banach algebras in which there exist a family of laws such that all of its members satisfy all of the laws. In this paper, we have used merely mathematical items such as Banach algebras and varieties including Banach algebras in order to change the space of all varieties of Banach algebras into a compact metric space. We prove some theorems in the metric space of zero at infinity varieties, define the ^*-varieties of ^{*}-algebra and prove many theorems about ^*-varieties of C^*-algebras.
Equilibria In A Dipersal Model For Structured Populations, Maref Y. M. Alzoubi
Equilibria In A Dipersal Model For Structured Populations, Maref Y. M. Alzoubi
Turkish Journal of Mathematics
We derive a model for structured population with a two-phase life cycle. Growth and reproduction occur during the first phase. The first phase is followed by a dispersal phase in which individuals are allowed to move throughout a habitat. Also, we prove the existence of a branch of positive equilibria using bifurcation results of Rabinowitz.
On Nuclearity Of Köthe Spaces, Erdal Karapinar, V. Zakharyuta
On Nuclearity Of Köthe Spaces, Erdal Karapinar, V. Zakharyuta
Turkish Journal of Mathematics
In this study we observe that the Köthe space K^{l_p}(A) is nuclear if it is isomorphic to a complemented subspace of K^{l_q}(B) for 1\leq p < q < \infty and p < 2.
Induced Mappings On Boolean Algebras Of Clopen Sets And On Projections Of The C^*-Algebra C(X), Ahmed Al-Rawashdeh, Wasfi Shatanawi
Induced Mappings On Boolean Algebras Of Clopen Sets And On Projections Of The C^*-Algebra C(X), Ahmed Al-Rawashdeh, Wasfi Shatanawi
Turkish Journal of Mathematics
For a compact space X, any group automorphism \varphi of C(X,S^1) induces a mapping \Theta on the Boolean algebra of the clopen subsets of X. We prove that the disjointness of \Theta equivalent to \theta_{\varphi} is an orthoisomorphism on the sets of projections of the C^*-algebra C(X), when \varphi(-1)=-1. Indeed, \Theta is a Boolean isomorphism iff \theta_{\varphi} preserves the product of projections. If X is equipped with a probability measure \mu, on a certain \sigma-algebra of X, we show (under some condition) that \Theta preserves the disjoint of clopen subsets, up to sets of measure zero, or equivalently, the mapping …
Some Remarks On The L^P - L^Q Boundedness Of Uc_{\Varphi}, M. R. Jabbarzadeh
Some Remarks On The L^P - L^Q Boundedness Of Uc_{\Varphi}, M. R. Jabbarzadeh
Turkish Journal of Mathematics
In this paper we will consider the weighted composition operators between two different L^p-spaces and then we characterize the functions u and transformations \varphi that induce weighted composition operator uC_{\varphi} between L^p(X, \Sigma, \mu)-spaces by using some properties of conditional expectation operator, pair (u, \varphi) and the measure space (X, \Sigma, \mu).
Braiding For Categorical And Crossed Lie Algebras And Simplicial Lie Algebras, Erdal Ulualan
Braiding For Categorical And Crossed Lie Algebras And Simplicial Lie Algebras, Erdal Ulualan
Turkish Journal of Mathematics
In this work, we give the notion of braiding for categorical Lie algebras and crossed modules of Lie algebras and we give an equivalence between them.
On The Unique Continuation Property For The Higher Order Nonlinear Schrödinger Equation With Constant Coefficients, Vanilde Bisognin, Octavio Paulo Vera Villagran
On The Unique Continuation Property For The Higher Order Nonlinear Schrödinger Equation With Constant Coefficients, Vanilde Bisognin, Octavio Paulo Vera Villagran
Turkish Journal of Mathematics
We solve the unique continuation property: If u is a solution of the higher order nonlinear Schrödinger equation with constant coefficients with t_1 < t_2 which is sufficiently smooth and such that supp u( . , t_j) \subset (a, b), -\infty < a < b < \infty, j = 1, 2, then u \equiv 0.
Steepness In Natural Exponential Families, Afif Masmoudi
Steepness In Natural Exponential Families, Afif Masmoudi
Turkish Journal of Mathematics
The present paper studies and develops the notion of steepness in multivariate natural exponential families. Let F = \{P(m,F); m \in M_F\} be a multidimensional natural exponential family parameterized by its domain of the means M_F and let \overline{m} be an element of \partial M_F the means domain boundary. A necessary and sufficient condition for the variance function V_F is established so that the family F be steep at \overline{m} \in \partial M_F. Some characteristic properties of a steep family are given. Also, we investigate the asymptotic behaviour of a steep family F at \overline{m}.
Multipliers And The Relative Completion In L_W^P(G), Cenap Duyar, A. Turan Gürkanli
Multipliers And The Relative Completion In L_W^P(G), Cenap Duyar, A. Turan Gürkanli
Turkish Journal of Mathematics
Quek and Yap defined a relative completion à for a linear subspace A of L^p(G), 1 \leq p < \infty ; and proved that there is an isometric isomorphism, between Hom_{L^1(G)}(L^1(G), A) and Ã, where Hom_{L^1(G)}(L^1(G),A) is the space of the module homomorphisms (or multipliers) from L^1(G) to A. In the present, we defined a relative completion à for a linear subspace A of L_w^p(G) ,where w is a Beurling's weighted function and L_w^p(G) is the weighted L^p(G) space, ([14]). Also, we proved that there is an algeabric isomorphism and homeomorphism, between Hom_{L_w^1(G)} (L_w^1(G),A) and Ã. At the end of this work we gave some applications and examples.
The Construction Of Maximum Independent Set Of Matrices Via Clifford Algebras, Nedi̇m Deği̇rmenci̇, Nüli̇fer Özdemi̇r
The Construction Of Maximum Independent Set Of Matrices Via Clifford Algebras, Nedi̇m Deği̇rmenci̇, Nüli̇fer Özdemi̇r
Turkish Journal of Mathematics
In [1], [2] and [6] the maximum number of some special type n x n matrices with elements in F whose nontrivial linear combinations with real coefficients are nonsingular is studied where F is the real field R, the complex field C or the skew field H of quaternions. In this work we construct such matrices explicitly by using representations of Clifford algebras. At the end we give some analogues of the celebrated theorem of Radon-Hurwitz.
On The Normalizer Of The Congruence Subgroup H_0^5(I) Of The Hecke Group H^5, Süleyman Uzun
On The Normalizer Of The Congruence Subgroup H_0^5(I) Of The Hecke Group H^5, Süleyman Uzun
Turkish Journal of Mathematics
Let l = 2 cos \frac{\pi}{5} and let H^5 be the Hecke group associated to l. In this paper, the normalizers of the congruence subgroups H_0^5(I) in PSL(2Z[\lambda]) are studied in the case where I = (2)^aI ', (2, I') = 1 and I' is a prime ideal.
An Investigation On A Subclass Of P-Valently Starlike Functions In The Unit Disc, Yaşar Polatoğlu, Meti̇n Bolcal, Arzu Şen, Emel Yavuz Duman
An Investigation On A Subclass Of P-Valently Starlike Functions In The Unit Disc, Yaşar Polatoğlu, Meti̇n Bolcal, Arzu Şen, Emel Yavuz Duman
Turkish Journal of Mathematics
Let A_p denote the class of functions of the form f(z) = z^p+a_{p+1}z^{p+1}+a_{p+2}z^{p+2}+ ··· which are regular and p-valent in the open unit disc D = {z : z < 1}. Let M_p(\alpha) be the subclass of A_p consisting of functions f(z) which satisfy Re ( z \frac{f'(z)}{f(z)}) < \alpha, (z \in D) for some real \alpha (\alpha > 1). The aim of this paper is to give a representation theorem, a distortion theorem and a coefficient inequality for the class M_p(\alpha).
Estimates For Fourier Transform Of Measures Supported On Singular Hypersurfaces, Isroil A. Ikromov
Estimates For Fourier Transform Of Measures Supported On Singular Hypersurfaces, Isroil A. Ikromov
Turkish Journal of Mathematics
We consider hypersurfaces S \subset \RR^3 with zero Gaussian curvature at every ordinary point with surface measure dS and define the surface measure d\mu = \psi(x)dS(x) for smooth function \psi with compact support. We obtain uniform estimates for the Fourier transform of measures concentrated on such hypersurfaces. We show that due to the damping effect of the surface measure the Fourier transform decays faster than O( \xi ^{-1/h}), where h is the height of the phase function. In particular, Fourier transform of measures supported on the exceptional surfaces decays in the order O( \xi ^{-1/2}) (as \xi \to +\infty).
Uniqueness Of Coprimary Decompositions, M. Maani-Shirazi, P. F. Smith
Uniqueness Of Coprimary Decompositions, M. Maani-Shirazi, P. F. Smith
Turkish Journal of Mathematics
Uniqueness properties of coprimary decompositions of modules over non-commutative rings are presented.
Slant Submanifolds Of Kaehler Product Manifolds, Bayram Şahi̇n, Sadik Keleş
Slant Submanifolds Of Kaehler Product Manifolds, Bayram Şahi̇n, Sadik Keleş
Turkish Journal of Mathematics
In this paper, we study slant submanifolds of a Kaehler product manifold. We show that an F-invariant slant submanifold of Kaehler product manifold is a product manifold. We also obtain some curvature inequalities in terms of scalar curvature and Ricci tensor.