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Search Results: 1 - 10 of 13340 matches for " Fawzi Gooda El Desouky "
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Structural, Magnetic and Dielectric Properties of Fe-Co Co-Doped Ba0.9Sr0.1TiO3 Prepared by Sol Gel Technique  [PDF]
Inas Kamal Batttisha, Ibrahim Sayed Ahmed Farag, Mostafa Kamal, Mohamed Ali Ahmed, Emad Girgis, Hesham Azmi El Meleegi, Fawzi Gooda El Desouky
New Journal of Glass and Ceramics (NJGC) , 2014, DOI: 10.4236/njgc.2014.42003
Abstract: The structural, dielectric and magnetic properties of pure and Fe-Co co-doped Ba0.9Sr0.1TiO3, (Ba(1-x)SrxTiO3, where (x = 0.10) and (Ba0.9Sr0.1Ti(1-x-y)FexCoyO3), where (x = 0.1, y = 0) and (x = 0 and y
Effect of Chloride Concentration on the Corrosion Rate of Maraging Steel  [PDF]
Hussam El Desouky, Hisham A. Aboeldahab
Open Journal of Physical Chemistry (OJPC) , 2014, DOI: 10.4236/ojpc.2014.44018
Abstract: The corrosion behavior of Maraging steel has been studied by using different techniques, including open circuit potential and polarization measurements in addition to microstructure examination such as optical microscopy and XRD (X-Ray Diffraction) investigation. The corrosion behavior of Maraging steel has been examined in sodium chloride solutions with different concentrations from 0.1 M to 2 M. It was found that the corrosion resistance of Maraging steel is inversely proportional with the concentration of sodium chloride solution. The corrosion resistance is directly proportional to the Mo and Ti content in the Maraging steel. Heat treatment of the Maraging steel improved its mechanical properties with no effect on the corrosion behavior as the precipitation of inter-metallic compounds leading to some galvanic action. However, sample IV having lower Mo content than sample V showed after heat treatment an improvement in the corrosion resistance.
A New Global Scalarization Method for Multiobjective Optimization with an Arbitrary Ordering Cone  [PDF]
El-Desouky Rahmo, Marcin Studniarski
Applied Mathematics (AM) , 2017, DOI: 10.4236/am.2017.82013
Abstract: We propose a new scalarization method which consists in constructing, for a given multiobjective optimization problem, a single scalarization function, whose global minimum points are exactly vector critical points of the original problem. This equivalence holds globally and enables one to use global optimization algorithms (for example, classical genetic algorithms with “roulette wheel” selection) to produce multiple solutions of the multiobjective problem. In this article we prove the mentioned equivalence and show that, if the ordering cone is polyhedral and the function being optimized is piecewise differentiable, then computing the values of a scalarization function reduces to solving a quadratic programming problem. We also present some preliminary numerical results pertaining to this new method.
New Extension of Unified Family Apostol-Type of Polynomials and Numbers  [PDF]
Beih El-Sayed El-Desouky, Rabab Sabry Gomaa
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.69134
Abstract: The purpose of this paper is to introduce and investigate new unification of unified family of Apostol-type polynomials and numbers based on results given in [1] [2]. Also, we derive some properties for these polynomials and obtain some relationships between the Jacobi polynomials, Laguerre polynomials, Hermite polynomials, Stirling numbers and some other types of generalized polynomials.
The Numerical Solution of the MRLW Equation Using the Multigrid Method  [PDF]
Yasser Mohamed Abo Essa, Ibrahim Abouefarag, El-Desouky Rahmo
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.521310
Abstract: In this paper, we obtained the numerical solutions of the modified regularized long-wave (MRLW) equation\"\", by using the multigrid method and finite difference method. The solitary wave motion, interaction of two and three solitary waves, and development of the Maxwellian initial condition into solitary waves are studied using the proposed method. The numerical solutions are compared with the known analytical solutions. Using\"\"error norms and conservative properties of mass, momentum and energy, accuracy and efficiency of the mentioned method will be established through comparison with other techniques.
Some New Results on the Number of Paths  [PDF]
Beih S. El-Desouky, Abdelfattah Mustafa, E. M. Mahmoud
Open Journal of Modelling and Simulation (OJMSi) , 2015, DOI: 10.4236/ojmsi.2015.33007
Abstract: Khidr and El-Desouky [1] derived a symmetric sum involving the Stirling numbers of the first kind through the process of counting the number of paths along a rectangular array n*m denoted by ?Anm. We investigate the generating function for the general case and hence some special cases as well. The probability function of the number of paths along is obtained. Moreover, the moment generating function of the random variable X and hence the mean and variance are obtained. Finally, some applications are introduced.
Solution of Nonlinear Stochastic Langevin’s Equation Using WHEP, Pickard and HPM Methods  [PDF]
Maha Hamed, Magdy A. El-Twail, Beih El-desouky, Mohamed A. El-Beltagy
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.53041

This paper introduces analytical and numerical solutions of the nonlinear Langevin’s equation under square nonlinearity with stochastic non-homogeneity. The solution is obtained by using the Wiener-Hermite expansion with perturbation (WHEP) technique, and the results are compared with those of Picard iterations and the homotopy perturbation method (HPM). The WHEP technique is used to obtain up to fourth order approximation for different number of corrections. The mean and variance of the solution are obtained and compared among the different methods, and some parametric studies are done by using Matlab.

Generalization of Some Problems with s-Separation  [PDF]
Beih El-Sayed El-Desouky, Mohamed Moustafa Gad, Shimaa El-Eraqy
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.61001
Abstract: In this article we apply and discuss El-Desouky technique to derive a generalization of the problem of selecting k balls from an n-line with no two adjacent balls being s-separation. We solve the problem in which the separation of the adjacent elements is not having odd and even separation. Also we enumerate the number of ways of selecting k objects from n-line objects with no two adjacent being of separations m, m + 1, , pm, where p is positive integer. Moreover we discuss some applications on these problems.
Effect of Learning Rate on the Recognition of Images
M. Hamed,A. El Desouky
Active and Passive Electronic Components , 1996, DOI: 10.1155/1996/45086
A Family of Generalized Stirling Numbers of the First Kind  [PDF]
Beih S. El-Desouky, Nabela A. El-Bedwehy, Abdelfattah Mustafa, Fatma M. Abdel Menem
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.510150
Abstract: A modified approach via differential operator is given to derive a new family of generalized Stirling numbers of the first kind. This approach gives us an extension of the techniques given by El-Desouky [1] and Gould [2]. Some new combinatorial identities and many relations between different types of Stirling numbers are found. Furthermore, some interesting special cases of the generalized Stirling numbers of the first kind are deduced. Also, a connection between these numbers and the generalized harmonic numbers is derived. Finally, some applications in coherent states and matrix representation of some results obtained are given.
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