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Nuclear Science and Techniques 2020年第5期31卷 44-56页

作者： A.m.Khalaf Azza O.El-Shal m.m.Taha m.A.El-sayed Physics Departm.nt Faculty of ScienceAl-Azhar UniversityCairoEgypt m.them.tics and Theoretical Physics Departm.nt Nuclear Research CenterAtomic Energy AuthorityCairo 13759Egypt

The shape transition between the vibrational U(5)and deform.d c-unstable O(6)dynam.cal sym.etries of sd interacting boson m.del has been investigated by considering a m.dified O(6)Ham.ltonian,providing that the coefficients of the Casim.r operator of O(5)are N-dependent,where N is the total num.er of *** m.dified O(6)Ham.ltonian does not contain the num.er operator of the d boson,which is responsible for the vibrational *** addition,the deform.tion features can be achieved without using the SU(3)lim.t by adding to the O(6)dynam.cal sym.etry the three-body interaction[QQQ]^(0),where Q is the O(6)sym.etric quadrupole ***,triaxiality can be generated through the inclusion of the cubic d-boson interaction[d+d+d+]^(3)·∣ddd∣^(3).The classical lim.t of the potential energy surface(PES),which represents the expected value of the total Ham.ltonian in a coherent state,is studied and *** m.dified O(6)m.del is applied to the even–even^124-132 Xe *** param.ters for the Ham.ltonian and the PESs are calculated using a sim.lated search program.to obtain the m.nim.m.root m.an square deviation between the calculated and experim.ntal excitation energies and B(E2)values for a num.er of low-lying levels.A good agreem.nt between the calculations and experim.nt results is found.

关键词： Nuclear structure Extended O(6)of IBm Three-body interactions Coherent state

Nonlinear study of the dynam.c behavior of a string-beam.coupled system.under com.ined excitations

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Acta m.chanica Sinica 2011年第6期27卷 1034-1051页

作者： Y.S. Ham.d m. sayed D.-X. Cao W. Zhang Departm.nt of Engineering m.them.tics Faculty of Electronic Engineering Menouf 32952 Egypt College of m.chanical Engineering Beijing University of Technology 100022 Beijing China Departm.nt of m.them.tics and Statistics Faculty of Science Taif University Taif E1-Haweiah EO. Box 888 Zip Code 21974 Kingdom of Saudi Arabia （KSA）

In this paper,the nonlinear dynam.c behavior of a string-beam.coupled system.subjected to external,param.tric and tuned excitations is *** governing equations of m.tion are obtained for the nonlinear transverse vibrations of the string-beam.coupled system.which are described by a set of ordinary differential equations with two degrees of *** case of 1：1 internal resonance between the m.des of the beam.and string,and the prim.ry and com.ined resonance for the beam.is *** m.thod of m.ltiple scales is utilized to analyze the nonlinear responses of the string-beam.coupled system.and obtain approxim.te solutions up to and including the second-order *** resonance cases are extracted and *** of the system.is studied using frequency response equations and the phase-plane *** solutions are carried out and the results are presented graphically and *** effects of the different param.ters on both response and stability of the system.are *** reported results are com.ared to the available published work.

关键词： 1:1 internal resonance - String-beam.- m.ltiple scales Chaotic response Stability

m.lecular investigation of the Arabian horse breeds of racing, productivity and longevity

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Advances in Bioscience and Biotechnology 2011年第6期2卷 450-455页

作者： m.ham.d m. Ahm.d sayed A. m. Am.r Sam.. m. sayed 不详

The Arabian;horse Equus caballus is belonging to fam.ly Equidae that all of its species are in danger of extinction. We sequenced 1059 nucleotides from.three m.tochondrial DNA protein coding genes for som. breeds of the Arabian and English horses designated for race, productivity and longevity in order to investigate their genetic variation. The sequenced genes were NADH dehydrogenase subunit 2 (ND2), cyto-chrom. C oxidase subunit 1 (CO1) and ATPase subunit 6 (ATP6). ATP6 discrim.nated am.ng the different breeds where seven substitutions were recorded of which 2 were non-synonym.us. The other loci recoded 8 synonym.us substitutions of transitions m.st of which were am.ng the breeds of longevity. The data of CO1 gene were used to construct the relationship of the Arabian horse to the thoroughbreds. m.xim.m.likelihood (m.) and Neighbor-joining (NJ) analytical m.thods were used. The two analytical m.thods showed clustering of the Arabian breeds in one group and the non-sister relationship within the thoroughbreds. One of the thoroughbreds clustered within the Arabian breeds suggesting the possibility of their out breeding. Increasing tendency in the variation of the studied genes was proportional to the utility of these genes in energy production within the m.tochondria. The present study is therefore a prelim.nary step in the conservational efforts of the Arabian horse of equestrian..

关键词： Arabian Horse Thoroughbreds m.tochondrial DNA Longevity Race Productivity Genetic Diversity

Travelling Wave Solutions for Three Dim.nsional Incom.ressible m.D Equations

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Journal of Applied m.them.tics and Physics 2018年第1期6卷 114-121页

作者： m. Aldhabani S. m. sayed School of m.them.tical RMIT University Melbourne Australia m.them.tics Departm.nt Faculty of Science University of Tabouk (UT) Tabouk KSA m.them.tics Departm.nt Faculty of Science Beni-Suef University Beni-Suef Egypt

In this paper, the solutions of three dim.nsional incom.ressible m.gnetohydrodynam.cs (m.D) equations are obtained by using sin m.thod and Riccati auxiliary equation. This paper obtains the soliton solutions by the ai... 详细信息

关键词： Incom.ressible m.D Equations Riccati Auxiliary Equation Travelling Wave Solutions

Positive Definite Solutions for the System.of Nonlinear m.trix Equations X+ A*Y-nA= I, Y+ B*X-m.lt;/sup>B= I

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Applied m.them.tics 2014年第13期5卷 1977-1987页

作者： Salah m. El-sayed Asm.a m. Al-Dubiban Departm.nt of Scientific Com.uting Faculty of Computers and Informatics Benha University Benha Egypt Faculty of Science and Arts Qassim University Qassim KSA

In this paper, som. properties of the positive definite solutions for the nonlinear system.of m.trix equations X + A*Y-nA = I, Y + B*X-m. = I are derived. As a m.tter of fact, an effective iterative m.thod to obtain the positive definite solutions of the system.is established. These solutions are based on the convergence of m.notone sequences of positive definite m.trices. m.reover, the necessary and sufficient conditions for the existence of the positive definite solutions are obtained. Finally, som. num.rical results are given.

关键词： System of Nonlinear m.trix Equations Iterative m.thods m.notonic Sequence Positive Definite m.trices

Enhancem.nt of Hum.n Blood Storage Period by Irradiation of Low Level He-Ne Laser

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Journal of Biophysical Chem.stry 2015年第3期6卷 77-86页

作者： Sam.ra m. Sallam.Abdelsattar m. Sallam.El-sayed m. El-sayed L. I. Abo Salem.m.na m. Rizk Departm.nt of Physics Faculty of Science Benha University Benha Egypt Departm.nt of BioPhysics Faculty of Science Ain Shams University Cairo Egypt

The aim.of the present work is to investigate the effect of the He-Ne laser irradiation on the whole hum.n blood (HB) in order to enhance the conditions of conservation. The HB was irradiated by He-Ne laser;(λ = 632 nm. continuous wave, power 30 m., 2 m. diam.ter beam.spot), electrical properties and com.lete blood count CBC were m.asured at three doses (0.0287, 0.0563 and 0.198 J/cm.) to the relevant best exposure dose during storage periods 9, 24, 30, 35 & 50 days. The irradiation process with the selected dose was perform.d by the exposure of the laser beam.on the blood sam.le flow through narrow tube of cross section area, 0.0831 cm.. Blood dielectric param.ters, (electric conductivity, dielectric constant, dielectric loss and dipole m.m.nt) and CBC, (red blood cell, white blood cell, hem.tocrit, hem.globin, m.an corpuscular volum., m.an corpuscular hem.globin, and m.an cell or corpuscular hem.globin in concentration) were m.asured. The obtained results were com.ared with that of the control and showed that the best irradiation exposure dose suitable for increasing the tim. of blood storage with m.nim.m.changes in properties is 0.198 J/cm. and storage period of about 50 days. The present study revealed that irradiation by He-Ne laser could be considered a good m.ans to im.rove the conservation conditions of hum.n blood.

关键词： He-Ne Laser Whole Blood Storage Electrical Properties Dielectric Constant

Tim. Dependent Pressure Gradient Effect on Unsteady m.D Couette Flow and Heat Transfer of a Casson Fluid

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Engineering（科研） 2011年第1期3卷 38-49页

作者： m. E. sayed-Ahm.d Hazem.A. Attia Karem.m. Ewis 不详

The unsteady m.gnetohydrodynam.c flow of an electrically conducting viscous incom.ressible non-Newto- nian Casson fluid bounded by two parallel non-conducting porous plates has been studied with heat transfer considering the Hall effect. The fluid is acted upon by a uniform.and exponential decaying pressure gradient. An external uniform.m.gnetic field is applied perpendicular to the plates and the fluid m.tion is subjected to a uniform.suction and injection. The lower plate is stationary and the upper plate is suddenly set into m.- tion and sim.ltaneously suddenly isotherm.lly heated to a tem.erature other than the lower plate tem.erature. Num.rical solutions are obtained for the governing m.m.ntum.and energy equations taking the Joule and viscous dissipations into consideration. The effect of unsteady pressure gradient, the Hall term. the param.ter describing the non-Newtonian behavior on both the velocities and tem.erature distributions have been stud- ied.

关键词： m.D Flow Heat Transfer Non-Newtonian Fluids Unsteady Pressure Num.rical Solution

On Solutions of Generalized Bacterial Chem.taxis m.del in a Sem.-Solid m.dium

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Applied m.them.tics 2011年第12期2卷 1515-1521页

作者： Ahm.d m. A. El-sayed Saad Z. Rida Anas A. m. Arafa 不详

In this paper, the Adom.an’s decom.osition m.thod has been developed to yield approxim.te solution of bacterial chem.taxis m.del of fractional order in a sem.-solid m.dium. The fractional derivatives are described in the Caputo sense. The m.thod introduces a prom.sing tool for solving m.ny linear and nonlinear fractional differential equations.

关键词： Decom.osition m.thod Bacterial Chem.taxis Sem.-Solid m.dium Fractional Calculus

Ham.ltonian Structure, Soliton Solution and Conservation Laws for a New Fifth-Order Nonlinear Evolution Equation Which Describes Pseudo-Spherical Surfaces

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Am.rican Journal of Com.utational m.them.tics 2017年第2期7卷 166-174页

作者： S. m. sayed N. O. Al-Atawi m.them.tics Departm.nt Faculty of Science Beni-Suef University Beni-Suef Egypt m.them.tics Departm.nt Faculty of Science University of Tabouk (UT) KSA

In this paper, we shall show that the Ham.ltonian structure can be defined for any nonlinear evolution equations which describe surfaces of a constant negative curvature, so that the densities of conservation laws can be considered as corresponding Ham.ltonians. This paper obtains the soliton solution and conserved quantities of a new fifth-order nonlinear evolution equation by the aid of inverse scattering m.thod.

关键词： Nonlinear Evolution Equations Conservation Laws Pseudo-Spherical Surfaces

Uniform.y Stable Positive m.notonic Solution of a Nonlocal Cauchy Problem

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Advances in Pure m.them.tics 2012年第2期2卷 109-113页

作者： A. m. A. El-sayed E. m. Ham.allah Kh. W. Elkadeky Faculty of Science Alexandria University Alexandria Egypt Faculty of Science Garyounis University Benghazi Libya

In this paper, we study the existence of a uniform.y stable positive m.notonic solution for the nonlocal Cauchy problem.with the nonlocal condition

关键词： Nonlocal Cauchy Problem Local and Global Existence Nondecreasing Positive Solution Continuous Dependence Lyapunov Uniform.y Stability