هندسة المباني

لقد حاول المعماريون والمهندسون المتخصصون بتكنولوجيا مواد البناء، من تطوير خواص القوة ، والتحمل لمادة الخرسانة ، حتى بات إستخدام الخرسانة التقليدية بخواصها المعروفه إساءة للمبنى والبيئة ، وكما يقولون فإن الحاجة أم الإختراع، فكانت الحاجة إما لمباني تناطح السحاب،وأبراج تصل إلى ارتفاعات غير تقليدية ، ومن أهم اسباب الإختراع والتطوير مادة الخرسانة عالية الكفاءة  .High performance concrete (HPC)لكن ماهي خصائص ...

 الملف المرفق عن كيفية التصنيع ومكونات الطوب الهوائي المجهز Autoclaved Aerated Concrete Block- AAC  والذي يطلق علية المتخصصون طوب الحاضر والمستقبل، يحوي الملف المرفق بالإضافة إلى ذلك اهم خصائصها الفيزيائية والميكانيكيه المقاله المرفقة من إعداد: م . رائد العطل، مهندس معماري، ماجستير تكنولوجيا مواد البناء  

للكاتب :M. E. Sayed-Ahmed and Karem M. KishkDepartment of Engineering Mathematics and Physics, Faculty of Engineering,Fayoum University ABSTRACTIn this study, we present a numerical solution for three dimensional laminar flow of Herschel-Bulkleynon-Newtonian fluids in the entrance region of a rectangular duct. The governing equations are solvediteratively by using finite difference method to obtain velocity components, pressure and frictionfactor. Modifications in computations ...

للكاتبين :Islam M. EL-Desoky and A. A. MousaDepartment of Basic Engineering sciences, Faculty of Engineering,Menofia University, Shebin El-Kom, Menofia, Egypt.ABSTRACTIn real systems, there is always a certain amount of slip, which, however, is hard to detectexperimentally because of the required space resolution. In this paper, the motion of acompressible viscous liquid with “slip” boundary condition is studied in an axisymmetriccylindrical ...

للكاتب :Tarek M. A. El-MistikawyDepartment of Engineering Mathematics and Physics, Faculty of Engineering,Cairo University, Giza, Egypt.ABSTRACTAn efficient numerical solver for the two-dimensional supersonic interacting boundary layer equationsis constructed. It is a two-sweep iterative approach that converges fast with the use of an enhancingparameter. It uses variable step sizes in both the streamwise and lateral directions, in order toaccommodate regions of ...

للكاتب :E. R HASSANFaculty of Engineering, Al-A zhar University, Nasr City, Cairo, Egypt.ABSTRAT. The existence of extremal solutions of the following functional Cauchy prob-lem [FCP]is investigated here. The main results established for non-funational Cauchy problem [N-FCP]in R [J. Math. Anal. Appl.198(1996),657-670] are generalized here in R, as well as in R’aswell as in Rⁿ

للكاتبين :Y. DJABALLAH and A. BELGACEM-BOUZIDALaboratoire d’Etude Physico-Chimique des Matériaux (LEPCM)Physics Department, Faculty of Science, University of Batna, AlgeriaABSTRACTThree semiconductor binary systems (Ga-P), (P-In) and (Ga-In) were optimized, usingCALPHAD method and the polynomial Redlich-Kister model to describe the Gibbs energy ofthe liquid phase. Together with published data on (GaP-PIn) pseudobinary system, isothermalsections of the ternary (Ga-P-In) system have been calculated ...

للكاتب :E. R. HASSANDepartment of Mathematics and Physics, Faculty of Engineering, Al-AzharUniversity, Nasr City,Cairo, Egypt.ABSTRACTIn [Proc. Ame. Math. Soc. vol.111, n01,1991] Majorana has considered the question of uniqueness for Cauchy problem for ordinary differential equation in R. The present paperextends these results to certain class of one-dimensional nonlinear integral equation ofVolterra type, as well as to certain classes of differential ...

للكاتبين :N. BOUKHALFA1 and A-H. MÉNIAI21Department of Industrial Chemistry. University of Biskra, Algeria.2Department of Industrial Chemistry. University of Constantine, AlgeriaABSTRACTIn this modeling work, we have applied the Marquardt-Levenberg method to optimize parametersof a thermodynamic model. The mathematical method was applied for 11 systems includingaqueous solutions of electrolytes. The thermodynamic model used requires three parameters foroptimization. We have elaborated a computer ...

للكاتب :M.H.SidkyFaculty of Engineering, Cairo University, Cairo , EgyptABSTRACTThis work presents a criterion to test the theoretical nuclear matrix element of ββ decaymodes for the isotopes128,130Te. The test has been carried out for the 0νββ decay mode by using different techniques with small and large basis of the Hilbert space. The lowest valuesof the mean deviation from the criterion used ...