Mathematics, Statistics & Physics: Recent submissions
Now showing items 721-738 of 738
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A New One-Step Iterative Process for Common Fixed Points in Banach Spaces
( Hindawi Publishing Corporation , 2008 , Article)We introduce a new one-step iterative process and use it to approximate the common fixed points of two asymptotically nonexpansive mappings through some weak and strong convergence theorems. Our process is computationally ... -
An efficient technique for finding the eigenvalues of fourth-order Sturm–Liouville problems
( Elsevier , 2009 , Article)In this paper, we will develop a numerical technique for finding the eigenvalues of fourth-order non-singular Sturm–Liouville problems. We used the variational iteration methods as a basis for this technique. Numerical ... -
Homotopy analysis method for fractional IVPs
( Elsevier , 2007 , Article)In this paper, the homotopy analysis method is applied to solve linear and nonlinear fractional initial-value problems (fIVPs). The fractional derivatives are described by Caputo’s sense. Exact and/or approximate analytical ... -
The multistage homotopy-perturbation method: A powerful scheme for handling the Lorenz system
( Elsevier , 2007 , Article)In this paper, a new reliable algorithm based on an adaptation of the standard homotopy-perturbation method (HPM) is presented. The HPM is treated as an algorithm in a sequence of intervals (i.e. time step) for finding ... -
Complex-impedance response of an Ag/TeO2-V2O5/Ag structure
( Elsevier , 2009 , Article)The ac conductivity of glass samples of composition 50 mol% TeO2 and 50 mol% V2O5 has been analyzed. The samples were prepared by the usual melt-quench method. The electrical conductance and capacitance were measured over ... -
On reality and asymptotics of zeros of q-Hankel transforms
( Elsevier Inc. , 2008 , Article)We give sufficient conditions which guarantee that the finite q-Hankel transforms have only real zeros which satisfy some asymptotic relations. The study is carried out using two different techniques. The first is by a use ... -
Empirical likelihood intervals for the population mean and quantiles based on balanced ranked set samples
( Springer-Verlag , 2008 , Article)We consider nonparametric interval estimation for the population mean and quantiles based on a ranked set sample. The asymptotic distributions of the empirical log likelihood ratio statistic for the mean and quantiles are ... -
An efficient dynamical systems method for solving singularly perturbed integral equations with noise
( Elsevier , 2009 , Article)In this paper we apply the dynamical systems method (DSM) proposed by A. G. Ramm, and the variational regularization method (VRM), to obtain numerical solution to some singularly perturbed ill-posed problems contaminated ... -
Strange non-dissipative and non-chaotic attractors and Palmer’s deterministic quantum mechanics
( Elsevier Ltd , 2008 , Article) -
An adaptive allocation sampling design for which the conventional stratified estimator is an appropriate estimator
( Elsevier B.V. , 2009 , Article)Adaptive allocations in stratified sampling design are suitable for studying Biological and Environmental populations. Biologists tend to use the conventional stratified estimator for an adaptive allocation sampling design ... -
Density manifolds, geometric measures and high-energy physics in transfinite dimensions
( Elsevier B.V. , 2009 , Article)We discuss certain manifolds with density. Furthermore, we outline natural connections leading to E-infinity theory and high-energy physics from a geometric measure and transfinite dimensional theoretical viewpoints. -
Application of Homotopy Perturbation Method to Singularly Perturbed Volterra Integral Equations
( Asian Network for Scientific Information , 2008 , Article)In this study, the Homotopy-Perturbation Method (HPM) proposed by J.-H. He is adopted for solving singularly perturbed Volterra integral equations (SVIEs). Three numerical examples are given to demonstrate the effectiveness ... -
Wireless transmission using cooperation on demand
( Elsevier B.V. , 2009 , Article)Mobile users with single antennas can still take advantage of spatial diversity through repetition based cooperative transmission. In this paper, we consider a scheme in which the cooperation is triggered only if the ... -
The mathematical theory of finite and infinite dimensional topological spaces and its relevance to quantum gravity
( Elsevier Ltd , 2009 , Article)The present work gives first a review of the mathematical theory of finite and infinite dimensional topological spaces. Subsequently we connect the discussion with E-infinity theory and the theory of partially ordered sets. ... -
Mössbauer effect study of Li21+Me4+Fe63+O122−spinels
( Baltzer Science Publishers, Baarn/Kluwer Academic Publishers , 1986 , Article)Mossbauer effect spectra are obtained for the cubic ferrites Li2 Me Fe6 O12 (where Me4+ is one of the tetravalent elements Ge, Si and Ti) at 78K up to their magnetic transition temperatures. In a rather large temperature ... -
Mössbauer study of ZnxNi5/3−xFe1Sb1/3O4 spinel ferrite
( Springer Verlag , 1985 , Article)The antimony substituted nickel ferrite ZnxNi5/3–xFe1Sb1/3O4 with different values ofx are prepared, checked by x-ray and studied with57Fe Mössbauer spectroscopy over a wide temperature range. Characteristic spectra of ... -
A 6th-order local approximation by a cubic curve
( Qatar University , 1997 , Article)We derive and present a MAPLE program for the construction of a parametric cubic polynomial curve which has sixth-order contract with a given smooth curve at a given point, thus providing a local sixth-order approximation ... -
Effect of gamma radiation on the morphology and Thermophysical properties of the pollen wall of Phoenix dactylifera L.
( Qatar University , 1994 , Article)Pollen grains of Phoenix dactylifera were exposed to different doses of gamma radiation (250,500,1000 rad and 1 M rad). To access the effect of radiation on the external morphology of the pollen grains, they were examined ...
