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Lie group analysis for thermophoretic and radiative augmentation of heat and mass transfer in a Brinkman-Darcy flow over a flat surface with heat generation

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Acta Mechanica Sinica 2011年第4期27卷 531-540页

作者： Faiza a.salama Department of Mathematics Faculty of ScienceSuez Canal UniversityEgypt

A boundary layer analysis is presented to investigate numerically the effects of radiation, thermophoresis and the dimensionless heat generation or absorption on hydromagnetic flow with heat and mass transfer over a flat surface in a porous medium. The boundary layer equations are transformed to non-linear ordinary differential equations using scaling group of transformations and they are solved numerically by using the fourth order Runge-Kutta method with shooting technique for some values of physical parameters. Comparisons with previously published work are performed and the results are found to be in very good agreement. Many results are obtained and a representative set is displayed graphically to illustrate the influence of the various parameters on the dimensionless velocity, temperature and concentration profiles as well as the local skin-friction coefficient, wall heat transfer, particle deposition rate and wall thermophoretic deposition velocity. The results show that the magnetic field induces acceleration of the flow, rather than deceleration （as in classical magnetohydrodynamics （MHD） boundary layer flow） but to reduce temperature and increase concentration of particles in boundary layer. Also, there is a strong dependency of the concentration in the boundary layer on both the Schmidt number and mass transfer parameter.

关键词： Lie group analysis Brinkman-Darcy flowBoundary layer Heat and mass transfer

Silicon-mediated highly efficient synthesis of 1,8-dioxo-octahydroxanthenes and their transformation to novel functionalized pyrano-tetrazolo[1,5-a]azepine derivatives

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Chinese Chemical Letters 2013年第5期24卷 404-406页

作者： Hanan A.Soliman Tarek a.salama Photochemistry Department National Research Center Chemistry Department Faculty of ScienceMansoura University

A facile and highly efficient protocol for the synthesis of 1,8-dioxo-octahydroxanthene derivatives was achieved through cascade Knoevenagel-Michael condensations and cyclo-dehydration reaction utilizing tetrachlorosilane（TCS） as catalyst under mild *** of the titled compounds with TCSNaN_3 to give novel functionalized pyrano[3,2-c]tetrazolo[1,5-a]azepine derivatives is also described.

关键词： Tetrachlorosilane 1,8-Dioxo-octahydroxanthenes Synthesis Tetrazoln[1,5-a]azepines

Silicon mediated synthesis and selected transformations of β-chloroketones

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Chinese Chemical Letters 2011年第10期22卷 1171-1174页

作者： Tarek a.salama Saad S.Elmorsy Chemistry Department Faculty of ScienceMansoura University35516 MansouraEgypt Chemistry Department Faculty of EducationAmran UniversityAmranYemen

A combination of tetrachlorosilane（TCS） and phenol in dichloromethane was found to be an efficient reagent for hydro-chlorination ofα,β-unsaturated ketones to afford the correspondingβ-chloroketones in good yield at ambient temperature. Reactions of the titled compounds with TCS-NaN_3 as well as with nitriles utilizing TCS-ZnCl_2 to give 1,5-disubstituted tetrazole derivatives orβ-amido ketones respectively are also described.

关键词： Tetrachlorosilane Phenol β-Chloroketones Synthesis Tetrazoles β-Amido ketones

Plenty of analytical and semi-analytical wave solutions of shallow water beneath gravity

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Journal of Ocean Engineering and Science 2022年第3期7卷 237-243页

作者： Mostafa M.A.Khater Samira.salama Department of Mathematics Faculty of ScienceJiangsu UniversityZhenjiang 212013China Department of Mathematics Obour High Institute For Engineering and TechnologyCairo 11828Egypt Division of Biochemistry Department of PharmacologyCollege of PharmacyTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

This article studies novel soliton wave solutions of the nonlinear fractional ill-posed Boussinesq(NLFIPB)dynamic wave equation by applying the extended Riccati-expansion(ERE)*** Hadamard has formulated the investigated model to figure out the dynamic characterizations of waves in shallow water under *** obtained solutions are explained through some sketches in 2D and 3D and contour *** the same time,the results’accuracy is checked by comparing the obtained solutions with semianalytical solutions through the well-known Adomian decomposition(AD)*** superiority of the ERE method over the original method is *** constructed solutions are checked by submitting them back into the original model through Mathematica 12 software.

关键词： Ill-posed Boussinesq dynamical wave Analytical and semi-analytical simulations

Semi-analytical and numerical simulations of the modified Benjamin-Bona-Mahony model

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Journal of Ocean Engineering and Science 2022年第3期7卷 264-271页

作者： Mostafa M.A.Khater Samira.salama Department of Mathematics Faculty of ScienceJiangsu UniversityZhenjiang212013China Department of Mathematics Obour High Institute For Engineering and TechnologyCairo11828Egypt Division of Biochemistry Department of PharmacologyCollege of PharmacyTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

In this article,semi-analytical and numerical simulations of the well-known modified Benjamin-Bona-Mahony(mBBM)equation are *** study targets to check the accuracy of the obtained analytical solutions of the mBBM model that have been obtained in[1]through three recent analytical schemes(extended simplest equation(ESE)method,modified kudryashov(mKud)method,and SechTanh(ST)expansion method).The considered model describes the propagation of long waves in the nonlinear dispersive media in a visual *** Homotopy iteration(HI)method,exponential cubic-B-spline(ECBS)method,and trigonometric-quantic-B-spline(TQBS)method are employed to construct novel semi-analytical and accurate numerical *** obtained solutions’accuracy has been checked through some different types of two-dimensional graphs.

关键词： Modified Benjamin-Bona-Mahony equation Approximate solutions

Effect of thermal conductivity on heat transfer for a power-law non-Newtonian fluid over a continuous stretched surface with various injection parameters

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Applied Mathematics and Mechanics(English Edition) 2010年第8期31卷 963-968页

作者： F.a.salama Department of Mathematics Faculty of Science Suez Canal University

The two-dimensional non-Newtonian steady flow on a power-law stretched surface with suction or injection is studied. Thermal conductivity is assumed to vary as a linear function of temperature. The transformed governing equations in the present study are solved numerically using the Runge-Kutta method. Through a comparison, results for a special case of the problem show excellent agreement with those in a previous work. Two cases are considered, one corresponding to a cooled surface temperature and the other to a uniform surface temperature. Numerical results show that the thermal conductivity variation parameter, the injection parameter, and the power-law index have significant influences on the temperature profiles and the Nusselt number.

关键词： non-Newtonian fluid thermal conductivity power-law fluid heat transfer

Blockchain with Explainable Artificial Intelligence Driven Intrusion Detection for Clustered IoT Driven Ubiquitous Computing System

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Computer Systems Science & Engineering 2023年第9期46卷 2917-2932页

作者： Reda.salama Mahmoud Ragab Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Faculty of ScienceAl-Azhar UniversityNaser City11884CairoEgypt

In the Internet of Things(IoT)based system,the multi-level client’s requirements can be fulfilled by incorporating communication technologies with distributed homogeneous networks called ubiquitous computing systems(UCS).The UCS necessitates heterogeneity,management level,and data transmission for distributed ***,security remains a major issue in the IoT-driven ***,energy-limited IoT devices need an effective clustering strategy for optimal energy *** recent developments of explainable artificial intelligence(XAI)concepts can be employed to effectively design intrusion detection systems(IDS)for accomplishing security in *** this view,this study designs a novel Blockchain with Explainable Artificial Intelligence Driven Intrusion Detection for IoT Driven Ubiquitous Computing System(BXAI-IDCUCS)*** major intention of the BXAI-IDCUCS model is to accomplish energy efficacy and security in the IoT *** BXAI-IDCUCS model initially clusters the IoT nodes using an energy-aware duck swarm optimization(EADSO)algorithm to accomplish ***,deep neural network(DNN)is employed for detecting and classifying intrusions in the IoT ***,blockchain technology is exploited for secure inter-cluster data transmission *** ensure the productive performance of the BXAI-IDCUCS model,a comprehensive experimentation study is applied,and the outcomes are assessed under different *** comparison study emphasized the superiority of the BXAI-IDCUCS model over the current state-of-the-art approaches with a packet delivery ratio of 99.29%,a packet loss rate of 0.71%,a throughput of 92.95 Mbps,energy consumption of 0.0891 mJ,a lifetime of 3529 rounds,and accuracy of 99.38%.

关键词： Blockchain internet of things ubiquitous computing explainable artificial intelligence clustering deep learning

A New Form of Fuzzy Compact Spaces and Related Topics via Fuzzy Idealization

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模糊系统与数学 2010年第2期24卷 33-39页

作者： A.a.salama Department of Mathematics Faculty of Science in Port SaidSuez Canal University

Fuzzy ideals and the notion of fuzzy local function were introduced and studied by Sarkar[12] and by Mahmoud in [9]. The purpose of this paper deals with a fuzzy compactness modulo a fuzzy ideal. Many new sorts of weak and strong fuzzy compactness have been introduced to fuzzy topological spaces in the last twenty years but not have been studied using fuzzy ideals so,the main aim of our work in this paper is to define and study some new various types of fuzzy compactness with respect to fuzzy ideals namely fuzzy L-compact and L*-compact spaces. Also fuzzy compactness with respect to ideal is useful as unification and generalization of several others widely studied concepts. Possible application to superstrings and E∞ space-time are touched upon.

关键词：模糊系统计算方法智能系统自动化

Electrical Properties of Li-doped P-type ZnO Ceramics

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Journal of Materials Science & Technology 2009年第3期25卷 314-318页

作者： A.H. salama F.F. Hammad Physical Chemistry Department National Research Center Inorganic Chemistry Department National Research Center

Li-doped p-type ZnO ceramics were prepared by conventional methods according to the chemical formula Zn1-xLixO2 where x=0.5, 1.0, 1.5 and 2.0 mole fraction, respectively. The crystal structures of the prepared samples were studied by X-ray diffraction analysis. The dielectric properties （including dielectric constant ε′ and dielectric loss ε″） and dc-electrical conductivity [σ（Ω^-***^-1）] were investigated. The dielectric constant ε′ was sharply decreased at the low frequency range and independent on frequency at high frequency range. Otherwise, the dielectric loss ε″ varied with frequency and showed absorption peak located from 200 Hz to 4 kHz and moved to higher frequency as the concentration of Li＋ doped increased. It was found that dcelectrical conductivity logσ varied from -9 to -5 and the energy gap width were calculated by using Arrhenius equation. The p-type conductivity of Li-doped ZnO may be attributed to the formation of a Lizn-Lii donor complex, which is limited by reducing the amount of Lii.

关键词： P-type ZnO ceramics Dielectric constant Dielectric loss dc-conductivity