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Effects of rotation and m.gnetic field on the nonlinear peristaltic flow of a second-order fluid in an asym.etric channel through a porous m.dium

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Chinese Physics B 2013年第7期22卷 303-313页

作者： A. m. Abd-Alla S. m. abo-Dahab H. D. El-Shahrany Departm.nt of m.them.tics Faculty of ScienceTaif University Departm.nt of m.them.tics Faculty of Science Departm.nt of m.them.tics Faculty of ScienceSouth Valley University

In this paper, the effects of both rotation and m.gnetic field of the peristaltic transport of a second-order fluid through a porous m.dium.in a channel are studied analytically and com.uted num.rically. The m.terial is represented by the constitutive equations for a second-order fluid. Closed-form.solutions under the consideration of long wavelength and low Reynolds num.er is presented. The analytical expressions for the pressure gradient, pressure rise, friction force, stream.function, shear stress, and velocity are obtained in the physical dom.in. The effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow in the wave fram. are analyzed theoretically and com.uted num.rically. Num.rical results are given and illustrated graphically in each case considered. Com.arison was m.de with the results obtained in the presence and absence of rotation, m.gnetic field, and porosity. The results indicate that the effects of the non-dim.nsional wave am.litude, porosity, m.gnetic field, rotation, and the dim.nsionless tim.-m.an flow are very pronounced in the phenom.na.

关键词： peristaltic flow second-order fluid m.gnetic field porous m.dium

Lateral Waves near the Surface of Sea

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Journal of Electrom.gnetic Analysis and Applications 2011年第6期3卷 199-207页

作者： osam. m. abo-seida Sam.ra T. Bishay Khaled m. El-m.rabie 不详

In this research, we investigate the propagation of lateral electrom.gnetic wave near the surface of sea. Interference patterns generated by the superposition of the lateral and direct waves along the sea surface (flat and rough) are shown. The field generated by a vertical m.gnetic dipole em.edded below the sea surface (having a flat and perturbed upper surface) is shown to consist of a lateral-wave and a reflected-wave. Closed-form.expressions for the lateral waves near the surface of the sea are obtained and com.ared with those m.ntioned for the reflected waves num.rically for the con-sidered m.del.

关键词： Stratified m.dia Rough Surface Radiation In Sea Lateral Waves

Hydrogen Bonding in Hydrogenated Am.rphous Germ.nium

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Tsinghua Science and Technology 2004年第2期9卷 177-180页

作者： m. S. abo-Ghazala S. Al Hazm. Physics Departm.nt Faculty of Science Menoufia University Sheben El-Koom EgyptChemistry Department Faculty of Science Sana University Yemen

Thin film. of hydrogenated am.rphous germ.nium.(a-Ge:H) were prepared by radio frequency glow discharge deposition at various substrate tem.eratures. The hydrogen distribution and bonding struc-ture in a-Ge:H were discussed based on infrared absorption data. The correlation between infrared absorp-tion spectra and hydrogen effusion m.asurem.nts was used to determ.ne the proportionality constant for each vibration m.de of the Ge-H bonds. The results reveal that the bending m.de appearing at 835 cm.1 is associated with the Ge-H2 (dihydride) groups on the internal surfaces of voids. While 1880 cm.1 is assigned to vibrations of Ge-H (m.nohydride) groups in the bulk, the 2000 cm.1 stretching m.de is attributed to Ge-H and Ge-H2 bonds located on the surfaces of voids. For film. associated with bending m.des in the infrared spectra, the proportionality constant values of the stretching m.des near 1880 and 2000 cm.1 are found to be lower than those of film. which had no corresponding bending m.des.

关键词： hydrogenated am.rphous germ.nium hydrogen bonding film

Peristaltic Transport of m.gnetohydrodynam.c Carreau Nanofluid with Heat and m.ss Transfer inside Asym.etric Channel

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Am.rican Journal of Com.utational m.them.tics 2017年第1期7卷 1-20页

作者： Nabil T. m. Eldabe osam. m. abo-seida Adel A. S. abo-Seliem.A. A. ElShekhipy Nada Hegazy m.them.tics Departm.nt Faculty of Education Ain Shams University Cairo Egypt Faculty of Com.uters and Inform.tion Kafrelsheikh University Kafrelsheikh Egypt m.them.tics Departm.nt Faculty of Science Kafrelsheikh University Kafrelsheikh Egypt m.them.tics Departm.nt Faculty of Science Minia University El-Minia Egypt m.them.tics Departm.nt Faculty of science Imam Abdulrahman Bin Faisal University Al-Dammam KSA

In this work, the peristaltic m.tion of a nano non-Newtonian fluid which obeys Carreau m.del through a porous m.dium.inside an asym.etric channel is investigated. The hall current effects with Joule heating and viscous dissipation are considered. The problem.is m.dulated m.them.tically by a set of nonlinear partial differential equations which describe the conservation of m.ss, m.m.ntum. energy and concentration of nanoparticles. The non-dim.nsional form.of these equations is sim.lified under the assum.tion of long wavelength and low Reynolds num.er, and then resulting equations of coupled nonlinear differential equations are tackled num.rically with appropriate boundary conditions. Graphical results are presented for dim.nsionless velocity, tem.erature, concentration and pressure gradient in order to illustrate the variations of various param.ters of this problem.on these obtained solutions.

关键词： Peristaltic m.tion m.D Carreau Nanofluid Asym.etric Channel Porous m.dium Heat and m.ss Transfer

Effects of rotation and gravity on an electro-m.gneto-therm.elastic m.dium.with diffusion and voids by using the Lord-Shulm.n and dual-phase-lag m.dels

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Applied m.them.tics and m.chanics(English Edition) 2019年第8期40卷 1135-1154页

作者： S.m.abo-DAHAB A.m.ABD-ALLA A.A.KILANY Departm.nt of m.them.tics Faculty of SciencesTaif UniversityTaif 888Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceSouth Valley UniversityQena 83523Egypt Departm.nt of m.them.tics Faculty of ScienceSohag UniversitySohag 82524Egypt

The effects of rotation and gravity on an electro-m.gneto-therm.elastic m.dium.with diffusion and voids in a generalized therm.plastic half-space are studied by using the Lord-Shulm.n (L-S) m.del and the dual-phase-lag (DPL) m.del. The analytical solutions for the displacem.nts, stresses, tem.erature, diffusion concentration, and volum. fraction field with different values of the m.gnetic field, the rotation, the gravity, and the initial stress are obtained and portrayed graphically. The results indicate that the effects of gravity, rotation, voids, diffusion, initial stress, and electrom.gnetic field are very pronounced on the physical properties of the m.terial.

关键词： electrom.gnetic field gravity field rotation initial stress voids diffusion norm.l m.de analysis Lord-Shulm.n (L-S) m.del dual-phase-lag (DPL) m.del

Effect of m.gnetic field on poroelastic bone m.del for internal rem.deling

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Applied m.them.tics and m.chanics(English Edition) 2013年第7期34卷 889-906页

作者： A.m.ABD-ALLA S.m.abo-DAHAB Departm.nt of m.them.tics Faculty of Sciences Taif University Departm.nt of m.them.tics Faculty of Science Sohag University Departm.nt of m.them.tics Faculty of Science South Valley University

This paper studies the effects of the m.gnetic field and the porosity on a poroelastic bone m.del for internal rem.deling. The solution of the internal bone rem.deling process induced by a m.gnetic field is presented. The bone is treated as a poroelastic m.terial by Biot＇s form.lation. Based on the theory of sm.ll strain adaptive elasticity, a theoretical approach for the internal rem.deling is proposed. The com.onents of the stresses, the displacem.nts, and the rate of internal rem.deling are obtained in analytical form., and the num.rical results are represented graphically. The results indicate that the effects of the m.gnetic field and the porosity on the rate of internal rem.deling in bone are very pronounced.

关键词： wave propagation poroelastic wet bone internal rem.deling m.gnetic field

Linearly and Quadratically Separable Classifiers Using Adaptive Approach

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Journal of Com.uter Science & Technology 2011年第5期26卷 908-918页

作者： m.ham.d Abdel-Kawy m.ham.d Ali Solim.n Rasha m.abo-Bakr Departm.nt of Com.uter and System. Engineering Faculty of EngineeringZagazig UniversityZagazigEgypt Departem.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazigEgypt

This paper presents a fast adaptive iterative algorithm.to solve linearly separable classification problem. in R *** each iteration,a subset of the sam.ling data （n-points,where n is the num.er of features） is adaptively chosen and a hyperplane is constructed such that it separates the chosen n-points at a m.rgin and best classifies the rem.ining *** classification problem.is form.lated and the details of the algorithm.are ***,the algorithm.is extended to solving quadratically separable classification *** basic idea is based on m.pping the physical space to another larger one where the problem.becom.s linearly *** illustrations show that few iteration steps are sufficient for convergence when classes are linearly *** nonlinearly separable data,given a specified m.xim.m.num.er of iteration steps,the algorithm.returns the best hyperplane that m.nim.zes the num.er of m.sclassified points occurring through these *** with other m.chine learning algorithm. on practical and benchm.rk datasets are also presented,showing the perform.nce of the proposed algorithm.

关键词： linear classification quadratic classification iterative approach adaptive technique

Electrochem.cal and Surface Characterization Studies of 2-am.no-6-m.thyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Com.ound on Copper in 2 m.HNO<sub>3</sub>

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Journal of m.terials Science and Chem.cal Engineering 2019年第12期7卷 71-86页

作者： Ahm.d m. Eldesoky Azza m. Attia Om.ym. E. Ahm.d m.ham.d A. abo-Elsoud Engineering Chem.stry Departm.nt High Institute of Engineering & Technology New Damietta Egypt Chem.stry Departm.nt Al-Qunfudah University College Umm Al-Qura University Mecca KSA Departm.nt of Chem.stry Faculty of Science Mansoura University Mansoura Egypt Faculty of Science and Arts Chemistry Department Najran University Najran KSA Evaluation and Analytical Departm.nt Egyptian Petroleum Research Institute Cairo Egypt Physics Departm.nt The University College in Al-Qunfudah Umm Al-Qura University Mecca KSA

The corrosion hindrance of Cu in 2.0 m.HNO3 solution by 2-am.no-6-m.thyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile com.ound has been studied, using Potentiodynam.c Polarization (PP), AC Im.edance (EIS), Electrochem.cal Frequency m.dulation (EFm. techniques. Also, EIS test was utilized to confirm.the corrosion protection m.chanism. 2-am.no-6-m.thyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile com.ound is suggested as a m.xed kind inhibitor. SEm.and EDX investigations of the Cu in 2.0 m.HNO3 surface revealed that assem.les protect Cu from.corrosion by adsorption on its surfaces by a form.ng coating film. Clearly, the assem.led m.chanism. play a role as a barrier to corrosive solution.

关键词： Carbonitrile Cu SEm EDX EIS EFm

m.le Breast Cancer:10-Year Experience at m.nsoura University Hospital in Egypt

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Clinical oncology and cancer researeh 2012年第1期9卷 23-28页

作者： Wafaa El-Beshbeshi Engy m.abo-Elnaga Departm.nt of Clinical Oncology and Nuclear m.dicine Faculty of MedicineMansoura University

Objective m.le breast cancer （m.C） is a rare disease representing less than 1% of all m.lignancies. The objective of the study is to report clinicopathological characteristics, treatm.nt patterns, and outcom.s of m.C in m.nsoura University Hospital, Egypt. m.thods This retrospective study focused on m.le breast cancer patients during 10 years （2000-2009）. The studied variables were data regarding general characteristics of patients, treatm.nt m.dalities and survival. Results The series included 37 patients （0.8% of all breast cancer）. The m.dian age was 57.7 years （range： 26-86 years）. The m.in clinical com.laint was a m.ss beneath the areola ill 94.5% of the cases. m.st patients had a locally advanced disease. 94.5% of tum.rs were invasive duct carcinom.s. The treatm.nt was essentially surgery in 91.8%, followed by adjuvant radiotherapy （in 89.2%）, horm.nal therapy （in 56.7%） and chem.therapy （in 91.8%）. Follow-up period ranged from.6-115 m.nths. Local recurrence occurred in 4 cases and m.tastasis in 11 cases. The 2-year and 5-year overall survival （OS） rates were 81.6% and 60.5%, respectively. The 2-year and 5-year disease-free survival （DFS） rates were 68.4%, and 52.6%, respectively. OS was not significantly affected by any of the studied param.ters. Factors influencing DFS were： T stage （P=0.05）, positive lym.h nodes （P=0.043）, m.tastasis （P=0.004）, and chem.therapy （1＇=0.046）. Conclusions m.C is a rare disease and often diagnosed at a locally advanced stage. The m.nagem.nt of m.le and fem.le breast carcinom. is identical. Future research for better understanding of this disease is needed to im.rove the m.nagem.nt and prognosis of m.le breast cancer patients.

关键词： breast neoplasm. m.le therapeutics Egypt