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Surgi.al Sci.nce 2014年第1期5卷 1-5页

作者： Mohammad H. Abo-Ryi. Hamdy S. Abd-Allah Osama H. El-Khadrawy gamal i. moussa Department of Surgery Gastrointestinal Surgery Unit Tanta University Hospital Tanta Egypt

Background: Obesi.y alone and rapi. wei.ht loss i.duced by bari.tri. surgery are recogni.ed ri.k factors for the development of choleli.hi.si.. Thi. study ai.ed to i.enti.y the predi.ti.e factors for gallstone formati.n after bari.tri. surgery. Pati.nt and methods: The fi.es of all morbi.ly obese pati.nts underwent bari.tri. surgery i. our uni. duri.g the peri.d from March 2003 ti.l October 2010 were revi.wed and analyzed. All pati.nts underwent routi.e preoperati.e ultrasonography and selecti.e concomi.ant cholecystectomy was done i. all pati.nts wi.h ultrasonographi.-confi.med choleli.hi.si.. After excludi.g cases wi.h pri.r and concomi.ant cholecystectomi.s, pati.nts were di.i.ed i.to two groups;those who developed gallstones and those who di. not and the two groups were compared. Results: Of the 143 revi.wed fi.es 135 were eli.i.le to be i.cluded i. the study. The i.ci.ence of choleli.hi.si. before surgery was 25.9% (35 cases). 19 cases (19%) of the 100 cases free at surgery developed gallstone at a mean of 13.2 months. Compari.g the two groups, no si.ni.i.ant di.ference was revealed regardi.g gender, age, preoperati.e BMi.or type of the operati.n. But the percent of excess wei.ht loss was si.ni.i.antly hi.her i. the group that formed gallstones. Conclusi.n: Gender, age, preoperati.e BMi.and type of the operati.n were not predi.ti.e of gallstones formati.n after bari.tri. surgery. The percent of excess wei.ht loss was the only predi.ti.e postoperati.e factor.

关键词： Obesi.y Gallstone Bari.tri. Surgery

Cosmologi.al appli.ati.ns i. Kaluza-Klei. theory

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Chi.ese Physi.s B 2012年第4期21卷 631-637页

作者： M. i. Wanas gamal G. L. Nashed A. A. Nowaya Astronomy Department Faculty of Science Cairo University Giza Egypt Mathemati.s Department Faculty of Science Ain Shams University Cairo 11566 Egypt Center for Theoreti.al Physi.s British University of Egypt Sherouk City 11837 P.O. Box 43 Egypt Mathemati.s Department Faculty of Science King Faisal University P.O. Box 380 Al-Ahsaa 31982 the Kingdom of Saudi Arabia Egypti.n Relati.i.y Group (ERG) Physics Department Faculty of Science Monofia University Monofia Egypt

The fi.ld equati.ns of Kaluz-Klei. （KK） theory have been appli.d i. the domai. of cosmology. These equati.ns are solved for a fi.t uni.erse by taki.g the gravi.ati.nal and the cosmologi.al constants as a functi.n of ti.e t. We use Taylor＇s expansi.n of cosmologi.al functi.n, A（t）, up to the fi.st order of the ti.e t. The cosmologi.al parameters are calculated and some cosmologi.al problems are di.cussed.

关键词： Kaluz-Klei. theory cosmology Taylor's expansi.n of cosmologi.al functi.n

The performance of acti.ated carbon/Ni.e_(2)O_(4) magneti. composi.e to retai. heavy metal i.ns from aqueous soluti.n

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Chi.ese Journal of Chemi.al Engi.eeri.g 2021年第1期34卷 135-145页

作者： S.i.moussa M.M.S.Ali.Reda R.Sheha Nuclear Chem.Dept. Hot Lab CenterAtomic Energy AuthorityCairo 13759Egypt Analyti.al Chem.Dept. Hot Lab CenterAtomic Energy AuthorityCairo 13759Egypt

A novel magneti. acti.ated carbon composi.e(AC/Ni.) was synthesi.ed by a preci.i.ati.n method and appli.d i. retenti.n of Cu(Ⅱ),and Zn(Ⅱ) i.ns from aqueous *** i.pact of di.ferent sorpti.n parameters such as:equi.i.rati.n ti.e,soluti.n pH value,competi.g cati.ns and i.ni. strength on the amount sorbed of Cu(Ⅱ),and Zn(Ⅱ) was *** i.lustrated that the magneti. composi.e had retenti.n abi.i.y towards both metal i.ns si.ni.i.antly hi.her than that of acti.ated carbon(AC).The magneti. composi.e exhi.i.ed an affi.i.y to adsorb Cu(Ⅱ) hi.her than Zn(Ⅱ) *** maxi.um sorpti.n capaci.i.s(Q_(max)) of the appli.d magneti. composi.e(AC/Ni.)towards Cu(Ⅱ) and Zn(Ⅱ) were 105.8 and 75.1 mg·g^(-1),*** of Cu(Ⅱ) and Zn(Ⅱ) was proposed to be achi.ved though an i.n exchange and surface adsorpti.n i. neutral condi.i.ns,whi.e preci.i.ati.n was beli.ved to be the relevant mechani.m i. thei. removal from basi. *** ki.eti. studi.s showed that sorpti.n process followed the ki.eti.s of pseudo-second-order reacti.ns wi.h rate constant of 3 × 10^(-3) and 2 × 10^(-3) mi.^(-1)for sorpti.n of Cu(Ⅱ) and Zn(Ⅱ) onto AC/Ni. *** of Cu(Ⅱ) sli.htly decreased wi.h i.creasi.g the i.ni. strength of aqueous soluti.n,usi.g NaCl as a background *** contrast,presence of Mn(Ⅱ),Mg(Ⅱ)and Co(Ⅱ) i. reacti.n soluti.ns hi.hly depressed the sorpti.n of Cu(Ⅱ) and Zn(Ⅱ) wi.h a competi.g effi.i.ncy followed the order:Mg(Ⅱ)> Mn(Ⅱ)> Co(Ⅱ).The magneti. composi.e was rapi.ly recovered from aqueous soluti.n by an external magneti. fi.ld,and effecti.ely regenerated usi.g 0.1 mol L^(-1) HCl and 0.1 mol L^(-1) FeCl_(3) as *** of Cu(Ⅱ) and Zn(Ⅱ) onto the surface of AC/Ni. composi.e occurred vi. a spontaneous *** thermodynami.ally favorable process had ΔH~o values of 30.9 kJ·mol^(-1) and 19.7 kJ·mol^(-1),*** results confi.m that the magneti. composi.e can be vi.wed as a promi.i.g novel composi.e opens new opportuni.i.s f

关键词： Acti.ated carbon Ni.kel ferri.e Composi.e Mechani.m

Energy and momentum of general spheri.ally symmetri. frames on the regulari.i.g teleparalleli.m

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Chi.ese Physi.s B 2012年第1期21卷 101-109页

作者： gamal G.L.Nashed Centre for Theoreti.al Physi.s The British University in EgyptEl-Sherouk City 11837Egypt Mathemati.s Department Faculty of ScienceAin Shams University

i. the context of the covari.nt teleparallel framework, we use the 2-form translati.nal momentum to compute the total energy of two general spheri.ally symmetri. frames. The fi.st one i. characteri.ed by an arbi.rary functi.n H（r）, whi.h preserves the spheri.al symmetry and reproduces all the previ.us soluti.ns, whi.e the other one i. characteri.ed by a parameter ξ whi.h ensures the vani.hi.g of the axi.l of trace of the torsi.n. We calculate the total energy by usi.g two procedures, i.e., when the Wei.zenbSck connecti.n Гα^β i. tri.i.l, and show how H（r） and ξ play the role of an i.erti. that leads the total energy to be unphysi.al. Therefore, we take i.to account Гα^β and show that although the spaceti.es we use contai. an arbi.rary functi.n and one parameter, they have no effect on the form of the total energy and momentum as i. should be.

关键词： gravi.ati.n teleparallel gravi.y energy-momentum conserved currents

Nonli.ear electrodynami.s coupled to teleparallel theory of gravi.y

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Chi.ese Physi.s B 2011年第2期20卷 73-82页

作者： gamal G.L.Nashed Mathemati.s Department Faculty of ScienceAin Shams UniversityCairoEgypt

Usi.g nonli.ear electrodynami.s coupled to teleparallel theory of gravi.y, regular charged spheri.ally symmetri. soluti.ns are obtai.ed. The nonli.ear theory i. reduced to the Maxwell one i. the weak li.i. and the soluti.ns correspond to charged spaceti.es. One of the obtai.ed soluti.ns contai.s an arbi.rary functi.n whi.h we call general soluti.n si.ce we can generate from i. the other soluti.ns. The metri. associ.ted wi.h these spaceti.es i. the same, i.e., regular charged stati. spheri.ally symmetri. black hole. i. calculati.g the energy content of the general soluti.n usi.g the gravi.ati.nal energy momentum wi.hi. the framework of the teleparallel geometry, we fi.d that the resulti.g form depends on the arbi.rary functi.n. Usi.g the regulari.ed expressi.n of the gravi.ati.nal energy-momentum we obtai. the value of energy.

关键词： tetrad theory of gravi.ati.n nonli.ear electrodynami.s spheri.ally symmetri. black holes gravi.ati.nal energy-momentum

Cosmologi.al appli.ati.n on fi.e-di.ensi.nal teleparallel theory equi.alent to general relati.i.y

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Chi.ese Physi.s B 2012年第10期21卷 122-129页

作者： gamal G.L.Nashed Mathemati.s Department Faculty of ScienceKing Faisal UniversityP.O.Box 380 Al-Ahsaa 31982the Kingdom of Saudi Arabia Mathemati.s Department Faculty of ScienceAin Shams UniversityCairo 11566Egypt Center for Theoreti.al Physi.s British University of EgyptSherouk City 11837P.O.Box 43Egypt

A theory of（4＋1）-di.ensi.nal gravi.y has been developed on the basi. of whi.h equi.alent to the theory of general relati.i.y by *** fundamental gravi.ati.nal fi.ld vari.bles are the 5-di.ensi.nal（5D） vector fi.lds（pentad）,defi.ed globally on a mani.old M,and gravi.y i. attri.uted to the *** Lagrangi.n densi.y i. quadrati. i. the torsi.n *** then apply the fi.ld equati.ns to two di.ferent homogenous and i.otropi. geometri. structures whi.h gi.e the same li.e element,i.e.,FRW i. fi.e *** cosmologi.al parameters are calculated and some cosmologi.al problems are di.cussed.

关键词： 5D teleparallel equi.alent of general relati.i.y 5D soluti.ns cosmologi.al parameters cosmologi.al problems

Hi.her-Order Stati.ti.s for Automati. Weld Defect Detecti.n

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Journal of Software Engi.eeri.g and Appli.ati.ns 2013年第5期6卷 251-258页

作者： Sara Saber gamal i. Seli. Department of Computer Engi.eeri.g Faculty of Engineering and Technology Arab Academy for Science and Technology Cairo Egypt

i.age processi.g and i.age analysi. are the mai. aspects for obtai.i.g i.formati.n from di.i.al i.age owi.g to the fact that thi. techni.ues gi.e the desi.ed detai.s i. most of the appli.ati.ns generally and Non-Destructi.e testi.g speci.i.ally. Thi. paper presents a proposed method for the automati. detecti.n of weld defects i. radi.graphi. i.ages. Fi.stly, the radi.graphi. i.ages were enhanced usi.g adapti.e hi.togram equali.ati.n and are fi.tered usi.g mean and wi.ner fi.ters. Secondly, the weldi.g area i. selected from the radi.graphy i.age. Thi.dly, the Cepstral features are extracted from the Hi.her-Order Spectra (Bi.pectrum and Tri.pectrum). Fi.ally, neural networks are used for feature matchi.g. The proposed method i. tested usi.g 100 radi.graphi. i.ages i. the presence of noi.e and i.age blurri.g. Results show that i. spi.e of ti.e consumpti.n, the proposed method yi.lds best results for the automati. detecti.n of weld defects i. radi.graphy i.ages when the features were extracted from the Tri.pectrum of the i.age.

关键词： Hi.h Order Stati.ti.s Defect Detecti.n Radi.graphi. i.ages Non-Destructi.e Testi.g

Spheri.ally Symmetri. Soluti.ns on a Non-Tri.i.l Frame i. f(T) Theori.s of Gravi.y

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Chi.ese Physi.s Letters 2012年第5期29卷 37-40页

作者： gamal G.L.Nashed Mathemati.s Department Faculty of ScienceKing Faisal UniversityP.O.Box 380 Al-Ahsaa 31982the Kingdom of Saudi Arabia Department of Mathemati.s Faculty of ScienceAin Shams UniversityCairo11566Egypt Center for Theoreti.al Physi.s British University of EgyptSherouk City 11837P.O.Box 43Egypt

A new soluti.n wi.h constant torsi.n i. deri.ed usi.g the fi.ld equati.ns of f(T).Asymptoti. forms of energy densi.y,radi.l and transversal pressures are shown to meet the standard energy condi.i.ns,i.e.,weak and 'null' energy condi.i.ns accordi.g to some restri.ti.ns on T0,f(T0) and fT(T0). Other soluti.ns are obtai.ed for vani.hi.g radi.l pressure and for speci.i. choi.es of f(T).The physi.s relevant to the resulti.g models i. di.cussed.

关键词： radi.l torsi.n vani.hi.g

Conserved charges of Kerr-Ads spaceti.e usi.g Poi.caré gauge versi.n

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Chi.ese Physi.s B 2013年第12期22卷 96-103页

作者： gamal G. L. Nashed Basi. Sci.nce Department Faculty of Engineering The British University in Egypt Sherouk City 11837P. O Box 43 Egypt Mathemati.s Department Faculty of Science Ain Shams UniversityCairo 11566 Egypt

The process of covari.nt conserved charge of gravi.ati.nal theory, whi.h i. covari.nt under general coordi.ate and local Lorentz transformati.ns, has been appli.d to many tetrad fi.lds, whi.h reproduce Kerr-Ads spaceti.e, to calculate thei. conserved charges. i. i. shown that thi. process gi.es an i.fi.i.e value of the conserved charges for Kerr–Ads spaceti.e. Therefore, the method of “regulari.ati.n through relocali.ati.n”, i.e., modi.i.ati.n of the Lagrangi.n of the gravi.ati.nal fi.ld through a total deri.ati.e, i. used. Thi. method gaves a fi.i.e and a consi.tent result of total energy and angular momentum for Kerr–Ads spaceti.e.

关键词： Kerr–Ads spaceti.es total conserved charges Poi.caré gauge versi.n

Fi.st-pri.ci.les study of structural,electroni.,and opti.al properti.s of cubi. i.As_xN_yP_(1-x-y) tri.ngular quaternary alloys

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Chi.ese Physi.s B 2017年第1期26卷 425-432页

作者： i.Hattabi.A Abdi.he F Soyalp R moussa R Ri.ne K Hadji.S Bi.-Omran R Khenata Laboratoi.e synthese et Catalyse Ibn Khaldoun Universite of Tiaret Tiaret 14000 Algeria Laboratoi.e de Physi.ue Quanti.ue et de Modeli.ati.n Mathemati.ue (LPQ3M) Departement de Technologie Universite de Mascara Mascara 29000 Algeria Department of Physi.s Faculty of Education Yuzuncu Ytl University 65080 Van Turkey Sci.nce and Technology D6partement i.n Khaldoun Uni.ersi.e de Ti.ret Ti.ret 14000 Algeria Department of Physi.s and Astronomy College of Science King Sand University Riyadh 11451 Saudi Arabia

i. thi. paper, we i.vesti.ated the structural, electroni. and opti.al properti.s of i.As, i.N and i.P bi.ary compounds and thei. related ternary and quaternary alloys by usi.g the full potenti.l li.eari.ed augmented plane wave（FP-LAPW）method based on densi.y functi.nal theory（DFT）. The total energi.s, the latti.e parameters, and the bulk modulus and i.s fi.st pressure deri.ati.e were calculated usi.g di.ferent exchange correlati.n approxi.ati.ns. The local densi.y approach（LDA） and Tran–Blaha modi.i.d Becke–Johnson（TB-m BJ） approxi.ati.ns were used to calculate the band *** vari.ti.ns of the latti.e parameters, the bulk modulus and the band gap wi.h composi.i.ns x and y are ***, the opti.al properti.s and the di.lectri. functi.n, refracti.e i.dex and loss energy were computed. Our results are i. good agreement wi.h the vali.ated experi.ental and theoreti.al data found i. the li.erature.

关键词： densi.y functi.nal theory full potenti.l li.eari.ed augmented plane wave Tran–Blaha modi.i.d Becke–Johnson approxi.ati.ns i.AsxNyP1-x-y