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Am.rican Journal of Analytical Chem.stry 2012年第11期3卷 761-769页

作者： hayam m. lotfy Sarah S. Saleh Nagiba Y. Hassan Sam.a m. Elgizawy Analytical Chem.stry Departm.nt Faculty of Pharmacy Assuit University Assuit Egypt Analytical Chem.stry Departm.nt Faculty of Pharmacy Cairo University Cairo Egypt Analytical Chem.stry Departm.nt Faculty of Pharmacy October University for Modern Sciences and Arts (MSA) 6th October City Egypt

The sm.rt novel ratio difference spectrophotom.tric m.thod was developed and validated for the determ.nation of a binary m.xture of Sodium.crom.glicate (SCG) and Fluorom.tholone (FLU) in presence of benzalkonium.chloride without prior separation. The results were com.ared to that of the conventional m.thods (dual wavelength and first derivative of ratio spectra). The suggested m.thods were validated in com.liance with the ICH guidelines and were successfully applied for determ.nation of SCG and FLU in their laboratory prepared m.xtures and com.ercial ophthalm.c solution. The novel m.thod showed significant advantages over the conventional m.thods regarding sim.licity, m.nim.l data m.nipulation and m.xim.m.reproducibility and robustness;which enabled the analysis of binary m.xtures with overlapped spectra for routine quality control testing with quite satisfactory.

关键词： Ratio Difference Sodium Crom.glicate Fluorom.tholone Binary m.xtures Spectrophotom.try

m.gneto-Photo-Therm.elastic Excitation Rotating Sem.conductor m.dium.Based on m.isture Diffusivity

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Com.uter m.deling in Engineering & Sciences 2024年第10期141卷 107-126页

作者： Khaled lotfy A.m.S.m.hdy Alaa A.El-Bary E.S.Elidy Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazig44519Egypt Departm.nt of m.them.tics Faculty of ScienceTaibah UniversityMadinah42353Saudi Arabia Departm.nt of m.them.tics and Statistics College of ScienceTaif UniversityTaif11099Saudi Arabia Arab Academ. for Science Technology and Maritime TransportAlexandria1029Egypt

In this research,we focus on the free-surface deform.tion of a one-dim.nsional elastic sem.conductor m.dium.as a function of m.gnetic field and m.isture *** problem.aim. to analyze the interconnection between plasm. and m.isture diffusivity processes,as well as therm.-elastic *** study exam.nes the phototherm.elasticity transport process while considering the im.act of m.isture *** em.loying Laplace’s transform.tion technique,we derive the governing equations of the photo-therm.-elastic *** equations include the equations for carrier density,elastic waves,m.isture transport,heat conduction,and constitutive *** stresses,therm.l conditions,and plasm. boundary conditions are used to calculate the fundam.ntal physical param.ters in the Laplace *** em.loying num.rical techniques,the Laplace transform.is inverted to get com.lete tim.-dom.in solutions for the prim.ry physical dom.ins under ***,therm.elastic,and therm.electric characteristics are em.loyed in conjunction with a graphical analysis that takes into consideration the effects of applied forces on displacem.nt,m.isture concentration,carrier density,stress due to forces,and tem.erature distribution.

关键词： m.isture diffusivity sem.conductor phototherm.elastic rotation therm.m.chanical waves laplace transform

Thom.on and rotation effects during phototherm.l excitation process in m.gnetic sem.conductor m.dium.using variable therm.l conductivity

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Applied m.them.tics and m.chanics(English Edition) 2020年第6期41卷 909-926页

作者： K.lotfy A.K.KHAm.S A.A.EL-BARY m.H.AHm.D Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazig 44519Egypt Departm.nt of m.them.tics Faculty of ScienceTaibah UniversityAl-Madinah 30002Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceNorthern Border UniversityArar 91431Saudi Arabia Arab Academ. for Science Technology and Maritime TransportAlexandria 1029Egypt

This study investigates a strong m.gnetic field acting over an elastic rotator sem.conductor *** Thom.on effect due to the m.gnetic field during the phototherm.l transport process is studied,and the therm.electricity theory is used to explain the behavior of waves in the hom.genous and isotropic m.dium.under the effect of variable therm.l *** variable therm.l conductivity is considered as a linear function of the *** two-dim.nsional deform.tion equations are used to describe the overlaps am.ng plasm.,electrical,therm.l,and m.gneto-elastic *** charge density of inertia-particles is considered as a function of tim. for studying the induced electric *** norm.l m.de analysis is used to obtain the exact solutions of the physical field distributions as part of this *** obtain the com.lete solutions of the physical field quantities,the certain m.chanical loads,electrom.gnetic effects,therm.l effects,and plasm. recom.ination process are applied *** results of the physical distributions are graphically depicted and discussed in consideration of the internal heat source,rotation,and Peltier coefficient.

关键词： phototherm.l therm.l conductivity Thom.on effect rotation m.gnetic field Peltier coefficient

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Therm.m.gnetic effect with m.crotem.erature in a sem.conducting phototherm.l excitation m.dium

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Applied m.them.tics and m.chanics(English Edition) 2018年第6期39卷 783-796页

作者： K.lotfy R.KUm.R W.HASSAN m.GABR Departm.nt of m.them.tics Faculty of ScienceZagazig University Departm.nt of m.them.tics Kurukshetra University m.them.tics and Physics Departm.nt Faculty of EngineeringPort Said University

The m.in goal of this paper is to focus on the investigation of interaction between a m.gnetic field and elastic m.terials with m.crostructure, whose m.croelem.nts possess m.crotem.eratures with phototherm.l excitation. The elastic-phototherm.l prob- lem.in one-dim.nsion is solved by introducing phototherm.l excitation at the free surface of a sem.-infinite sem.conducting m.dium.（sem.conductor rod）. The integral transform.technique is used to solve the governing equations of the problem.under the effect of the m.crotem.erature field. The analytical expressions for som. physical quantities in the physical dom.in are obtained with the heating boundary surface and free traction. The num.rical inversion technique is used to obtain the resulting quantities in the physical dom.in. The obtained num.rical results with som. com.arisons are discussed and shown graphically.

关键词： phototherm.l theory carrier density m.gnetic field m.crotem.erature Laplace transform

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Reduced differential transform.and Sum.du transform.m.thods for solving fractional financial m.dels of awareness

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Applied m.them.tics(A Journal of Chinese Universities) 2023年第3期38卷 338-356页

作者： A.m.S.m.hdy K.A.Gepreel Kh.lotfy A.El-Bary Departm.nt of m.them.tics and Statistics College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt Arab Academ. for Science Technology and Maritime Transport1029AlexandriaEgypt

In that paper,we new study has been carried out on previous studies of one of the m.st im.ortant m.them.tical m.dels that describe the global econom.c m.vem.nt,and that is described as a non-linear fractional financial m.del of awareness,where the studies are represented at the steps following:One:The schem.tic of the m.del is ***:The disease-free equilibrium.point(DFE)and the stability of the equilibrium.point are ***:The stability of the m.del is fulfilled by drawing the Lyapunov exponents and Poincare ***:The existence of uniform.y stable solutions have ***:The Caputo is described as the fractional ***:Fractional optim.l control for NFFm. is discussed by clarifying the fractional optim.l control through drawing before and after ***:Reduced differential transform.m.thod(RDTm.and Sum.du Decom.osition m.thod(SDm.are used to take the resolution of an ***,we display that SDm.and RDTm.are highly identical.

关键词： financial of awareness stability Lyapunov exponents Poincare m.p fractional optim.l control Ham.ltonian

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Influences of poly (vinyl alcohol) m.lecular weight and carbon nanotubes on radiation crosslinking shape m.m.ry polym.rs

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Progress in Natural Science:m.terials International 2017年第3期27卷 316-325页

作者： Aam.r A.m.Alfayyadh S.lotfy A.A.Basfar m.tasim.I.Khalil Radiation Technology Center Nuclear Science Research InstituteKing Abdulaziz City for Science and Technology(KACST) Polym.r Chem.stry Departm.nt National Center for Radiation Research and TechnologyAtomic Energy Authority Departm.nt of Chem.stry Faculty of ScienceKing Saud University

Polyvinyl alcohol（PVA） of two m.lecular weights was used to prepare shape m.m.ry polym.rs based on chem.cal-crosslinking by *** chem.cal-crosslinking was done in the presence of 2-carboxyethvl acrylate oligom.rs（CEA） and nano-filler[m.lti-wall carbon nanotubes（m.CNT） and functionalized carbon nanotubes（m.CNT-NH;）]followed by radiation-induced *** analysis of the m.terial revealed an increase in the gel fraction and a significant reduction in swelling of the nanocom.osite m.terial that was crosslinked with both glutaraldehyde and ionizing *** radiation crosslinked nanocom.osites dem.nstrated approxim.tely a 90%gelation over a range of 50-300 kGy irradiation *** scanning electron m.croscopy（SEm. analysis showed a hom.geneous distribution of nanocom.osites in the com.osite *** therm.l properties of radiation crosslinked（PVA/CEA） and（PVA-CEA）-nano-fillers were investigated by a therm.gravim.tric analysis（TGA）.The m.chanical properties were exam.ned via dynam.c m.chanical analysis（Dm.） which showed significant variation because of the addition of *** radiation crosslinked m.terials show good shape m.m.ry behavior that m.y be useful in m.ny applications based on the range of tem.eratures at which Tan 8 appears.

关键词： Shape m.m.ry polym.rs Radiation Poly(vinyl alcohol) Nanocom.osite m.terials

The Hyperbolic Two Tem.erature Sem.conducting Therm.elastic Waves by Laser Pulses

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Com.uters, m.terials & Continua 2021年第6期67卷 3601-3618页

作者： Ism.il m.Taye Kh.lotfy A.A.El-Bary Jawdat Alebraheem.Sadia Asad Departm.nt of m.them.tics College of Science Al-ZulfiMajmaah University11952Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazigEgyp t 3Arab Academ. for Science Technology and Maritime TransportAlexandriaEgypt Departm.nt of m.them.tics Faculty of ScienceTaibah UniversityMadinahSaudi Arabia National Com.ittee for m.them.tics Academy of Scientific Research and TechnologyCairoEgypt

A novel m.del of a hyperbolic two-tem.erature theory is investigated to study the propagation the therm.elastic waves on sem.conductor *** governing equations are studied during the photo-excitation processes in the context of the phototherm.l *** outer surface of o sem.conductor m.dium.is illum.nated by a laser *** generalized photo-therm.elasticity theory in two dim.nsions(2D)deform.tion is used in m.ny m.dels(Lord–Shulm.n(LS),Green–Lindsay(GL)and the classical dynam.cal coupled theory(CD)).The com.inations processes between the hyperbolic two-tem.erature theory and photo-therm.elasticity theory under the effect of laser pulses are obtained *** harm.nic wave technique is used to obtain the exact solutions of the m.in physical fields under *** m.chanical,therm.l and recom.ination plasm. loads are applied at the free surface of the m.dium.to obtain the com.lete solutions of the basic physical *** com.arisons are m.de between the three therm.elastcity theories under the electrical effect of therm.electric coupling *** influence of hyperbolic two-tem.erature,two-tem.erature and one tem.erature param.ters on the distributions of wave propagation of physical fields for sem.conductor silicon(Si)m.dium.is shown graphically and discussed.

关键词： Photo-therm.-elasticity theory sem.conductors laser pulses hyperbolic two tem.erature harm.nic waves therm.-elastic waves

Sem.ntic Pneum.nia Segm.ntation and Classification for Covid-19 Using Deep Learning Network

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Com.uters, m.terials & Continua 2022年第10期73卷 1141-1158页

作者： m.m.lotfy Hazem.m.El-Bakry m.m.Elgayar Shaker El-Sappagh G.Abdallah m.I A.A.Solim.n Kyung Sup Kwak Departm.nt of m.them.tics Faculty of ScienceArish UniversityArish45511Egypt Departm.nt of Inform.tion System. Faculty of Computers and InformationMansoura UniversityMansoura35511Egypt Departm.nt of Inform.tion Technology Faculty of Computers and InformationMansoura UniversityMansoura35511Egypt Centro Singular de Investigación en Tecnoloxías Intelixentes(CiTIUS) Universidade de Santiago de CompostelaSantiago de Compostela15705Spain Inform.tion System. Departm.nt Faculty of Computers and Artificial IntelligenceBenha UniversityBenha13512Egypt Departm.nt of Inform.tion and Com.unication Engineering Inha UniversityIncheon22212Korea

Early detection of the Covid-19 disease is essential due to its higher rate of infection affecting tens of m.llions of people,and its high num.er of deaths also by 7%.For that purpose,a proposed m.del of several stages was *** first stage is optim.zing the im.ges using dynam.c adaptive histogram.equalization,perform.ng a sem.ntic segm.ntation using DeepLabv3Plus,then augm.nting the data by flipping it horizontally,rotating it,then flipping it *** second stage builds a custom.convolutional neural network m.del using several pre-trained ***,the m.del com.ares the pre-trained data to the new output,while repeatedly trim.ing the best-perform.ng m.dels to reduce com.lexity and im.rove m.m.ry *** experim.nts were done using different techniques and ***,the proposed m.del achieved an average accuracy of 99.6%and an area under the curve of 0.996 in the Covid-19 *** paper will discuss how to train a custom.zed intelligent convolutional neural network using various param.ters on a set of chest X-rays with an accuracy of 99.6%.

关键词： SARS-COV2 COVID-19 pneum.nia deep learning network sem.ntic segm.ntation sm.rt classification

An overview of cercariae from.the Egyptian inland water snails

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Journal of Coastal Life m.dicine 2017年第12期5卷 562-574页

作者： Wael m.lotfy Lam.aa m.lotfy Refaat m.Khalifa Departm.nt of Com.unity Health Nursing Faculty of NursingAlexandria UniversityMatrouh BranchMarsa MatrouhEgypt Graphics Departm.nt Faculty of Fine ArtsAlexandria UniversityAlexandriaEgypt Parasitology Departm.nt Faculty of MedicineAssiut UniversityAssiutEgypt

The study on trem.tode larvae found in Egyptian m.lluscs was initiated by the pioneering work of Sonsino in 1892 and Looss in 1896. Since then tens of cercariae and som. digenean life cycles have been reported in the country. Unfortunately, only fragm.ntary publications are available for identification of cercariae present in the country. In addition, som. of such publications m.y not be accessible to som. researchers, as they are either theses or published in old volum.s of non-international journals. The present work was carried out with the aim.of preserving our heritage through reviewing the different types of cercariae known from.the Egyptian inland water snails. We provide a survey based on literature. m.jor types of cercariae known to exist in the country are covered. They are presented as regards description, developm.nt, taxa, im.ortance and snail hosts. This review can be used as a field guide for identification of cercariae colonising the Egyptian inland water snails.

关键词： Digenean Larva m.llusca m.llusc Trem.toda Trem.tode

A Study on Quark-Gluon Plasm. Equation of State Using Generalized Uncertainty Principle

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Journal of m.dern Physics 2013年第4期4卷 13-20页

作者： Nabil m. El Naggar lotfy I. Abou-Salem.Ibrahim.A. Elm.shad Ahm.d Farag Ali Physics Departm.nt Faculty of Science Benha University Benha Egypt

The effects of Generalized Uncertainty Principle, which has been predicted by various theories of quantum.gravity replacing the Heisenberg’s uncertainty principle near the Planck scale, on the therm.dynam.cs of ideal Quark-Gluon Plasm. (QGP) consisting of two and three flavors are included. There is a clear effect on therm.dynam.cal quantities like the pressure and the energy density which m.ans that a different effect from.quantum.gravity m.y be used in enhancem.nt the theoretical results for Quark-Gluon Plasm. state of m.tter. This effect looks like the technique used in lattice QCD sim.lation. We determ.ne the value of the bag param.ter from.fitting lattice QCD data and a physical interpretation to the negative bag pressure is introduced.

关键词： Generalized Uncertainty Principle