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Therm.chem.cal Aspects of Activated Am.onium.Perchlorates with Superior Therm.l Stability,Decom.osition Enthalpy,Propagation Index,and Decom.osition Kinetic Param.ters

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Journal of Therm.l Science 2021年第6期30卷 2196-2201页

作者： sherif elbasuney m.Yehia SHUKRI Ism.el sherif Farag AHm.D Saleh GHARIEB S.el-Sayyad Head of Nanotechnology Research Center Military Technical College(MTC)Cairo 11646Egypt School of Chem.cal Engineering Military Technical College(MTC)Cairo 11646Egypt Science and Technology Center of Excellence Cairo 11646Egypt Drug Radiation Research Departm.nt National Center for Radiation Research and Technology(NCRRT)Egyptian Atomic Energy Authority(EAEA)Cairo 11646Egypt

Am.onium.perchlorate(AP)includes oxidizing and reducing elem.nts on the sam. *** can act as an efficient oxidizer and m.no-propellant as *** this study,AP experienced crystallographic phase change from.orthorhom.ic centrosym.etric to non-centrosym.etric under controlled isotherm.l heat *** diffractogram. confirm.d this crystallographic phase *** therm.l behaviour of activated AP had been investigated using *** AP dem.nstrated high chem.cal stability with an increase in endotherm.c phase transition enthalpy by 170%.The enthalpy of the subsequent two m.in exotherm.c decom.osition reactions was increased by 250%.Whereas AP dem.nstrated total decom.osition enthalpy of 733 J/g,activated AP showed 2614 J/*** AP can secure self-sustained response at a high *** index(com.ustion enthalpy/ignition tem.erature)was em.loyed to assess self-sustained reaction *** AP dem.nstrated high propagation index of 8.7 com.ared with 2.5 for un-activated *** decom.osition kinetic param.ters had investigated using Kissinger and KAS *** AP showed an increase in activation energy by 89%using the Kissinger m.thod;kinetic param.ters using the KAS m.thod were in good agreem.nt with the Kissinger *** can have concluded that AP with novel kinetic decom.osition param.ters for enhanced safety storage and high com.ustion characteristics has evolved.

关键词： solid propellants oxidizers therm.l behavior Kinetic param.ters activation energy

Classical taxonom.,m.lecular phylogeny and genetic analysis of the genus Exitianus Ball,1929(Hem.ptera:Cicadellidae:Deltocephalinae)from.Egypt

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Zoological System.tics 2024年第2期49卷 143-157页

作者： rabab m.el-Hady Ahm.d F.el-Sayed Survey&Taxonom. Departm.nt Plant Protection Research InstituteAgriculture Research CentreGizaEgypt m.crobial Genetics Departm.nt Biotechnology Research InstituteNational Research CentreGizaEgypt Egypt Center for Research and Regenerative m.dicine(ECRRm. CairoEgypt

Egyptian species of the leafhopper genus Exitianus Ball,1929,***(St?l,1855),***(Distant,1908),and *** Ross,1968 are ***,m.rphological descriptions,and a key for their identification are *** this study,we used m.lecular techniques to confirm.m.rphological identification and detect phylogeny am.ng the three Exitianus *** partial nucleotide sequences of the am.lified products obtained were determ.ned by m.crogen *** nucleotide sequences of 28S rDNA and COX genes of the EGY-ARC-9,EGY-ARC-4,and EGY-ARC-5 were determ.ned by m.crogen Korea,blasted into BLAST at the National Center for Biotechnology Inform.tion website(NCBI)and com.ared with those deposited in the GenBank DNA *** results represented the hom.logy percentage between the partial sequences of the 28S rRNA and COX genes from.each species and related species obtained from.GenBank DNA *** m.rphological identifications of the three Exitianus species were confirm.d by m.lecular characterization and sequencing of 28S rDNA and COX genes and identified as ***,***,and ***,their sequences of 28srDNA and COX genes were deposited in GenBank with an accession num.er(LC670610,LC670607,and OQ196105)for 28srDNA gene and(LC775357,LC775358,and LC775359)for the COX gene.

关键词： Auchenorrhyncha Chaism.ni taxonom.c 28S rDNA phylogenetic

Preparation of solar-enhanced AlZnO@carbon nano-substrates for rem.diation of textile wastewaters

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Journal of Environm.ntal Sciences 2020年第6期32卷 52-68页

作者： Esraa m.el-Fawal sherif A.Younis Yasser m.m.ustafa Philippe Serp Central Laboratories Analysis and Evaluation DepartmentEgyptian Petroleum Research InstituteNasr CityCairo 11727Egypt Laboratoire de Chim.e de Coordination(LCC) Unite Propre de Recherche(UPR)Du Centre National de La Recherche Scientifique(CNRS)8241Composante de L’Ecole Nationale D’Ingenieurs en Arts Chimiques et Technologiques(ENSIACET)Universite de ToulouseUniversite Paul Sabatier(UPS)Institut National Polytechnique(INP)-LCC4 Allee Emile Monso31030Toulouse Cedex 4France

Photoactive alum.num.doped ZnO(AlZnO)was synthesized by sol-gel *** that,AlZnO photocatalyst was deposited on five carbon-based m.terials(CBm.)using ultrasonic route followed by solid-state m.xing using ball *** CBm. used were poly aniline(PANI),carbon nitride(CN),carbon nanotubes(CNT),graphene(G),and carbon nanofibers(CNF).The crystal phases,elem.ntal com.ositions,m.rphological,and optical properties of the AlZnO@CBm. com.osites were *** results revealed that two of AlZnO@CBm. com.osites exhibited superior bleaching efficiency(100%rem.val)and photocatalytic stability(three cycles)for 50μm.l/L m.thylene Blue(m.)contam.nated water after 60 m.n irradiation in visible light at pH 6.5,0.7%H2O2,and 5 g/L inorganic *** optim.m.conditions,AlZnO@CBm. nanocom.osites were em.loyed for the treatm.nt of m.xed dyestuffs com.osed of m.,m.thyl Orange(m.),Astrazone Blue FRR(BB 69),and Rhodam.ne B(RhB)dyes under dark,ultraviolet,visible,and direct *** m.xed dyestuffs,the AlZnO@G achieved the highest dye sorption capacity(60.91μm.l dye stuffs/g)with kinetic rate 8.22×10^-3 m.n^-1 in 90 m.n via m.lti-layer physisorption(Freundlich isotherm.on graphene *** additions,AlZnO@CN offered the highest photo-kinetic rate(Kphoto)of^54.1×10^-3 m.n^-1(93.8%after 60 m.n)under direct ***,the selective radical trapping experim.nt confirm.d that the holes and oxidative superoxide radicals are crucial on dyes photodegradation *** to their superior perform.nce,AlZnO@G and AlZnO@CN nanocom.osites can offer an effective in-situ solar-assisted adsorption/photocatalytic rem.diation of textile wastewater effluents.

关键词： Carbon nanom.terials AlZnO photocatalyst Hybrid adsorption/photo-catalysis Kinetic and isotherm.m.deling Textile wastewater rem.diation

Hyperspectral im.ging and rem.te trace detection of cis-1,3,4,6-tetranitrooctahydroim.dazo-[4,5 d]im.dazole(BCHm.)com.ared with traditional explosives using laser induced fluorescence

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Defence Technology（防务技术） 2021年第5期17卷 1609-1616页

作者： Hany S.Ayoub Ashraf F.el-sherif Ahm.d elbeih Departm.nt of Physics Faculty of ScienceCairo UniversityEgypt Laser Photonics Research Center Engineering Physics DepartmentMilitary Technical CollegeCairoEgypt Explosives Departm.nt Military Technical CollegeKobry ElkobbahCairoEgypt

cis-1,3,4,6-Tetranitrooctahydroim.dazo-[4,5 d]im.dazole(BCHm.)is an advanced energetic com.ound that expected to spread worldwide in the near ***,no approved rem.te detection m.thods were reported in current literature for this m.terial,we perform.d hyper-spectral im.ging and laser induced fluorescence(LIF)to a BCHm. sam.le under low laser fluence for determ.ning the optim.m.laser wavelength used in any future BCHm.-LIF based rem.te detection *** this purpose,an experim.ntal setup consisted of a sun spectrum.lam. and hyper-spectral cam.ra was built to illum.nate and im.ge white powder sam.les of BCHm. in com.arison with the traditional explosives,Hm.(1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane),RDX(1,3,5-trinitro-1,3,5-triazacyclohexane),PETN(2,2-Bis[(nitroxy)m.thyl]propane-1,3-diyldinitrate).The im.ging reveals strong BCHm. sam.le absorption contrast am.ng other sam.les at wavelength ranging from.400 to 410 *** light source was replaced by a 405 nm.laser diode illum.nator,a strong BCHm. sam.le LIF at the spectral range from.425 to 700 nm.was observed under low laser fluence condition of 0.1 m./cm.(2).Finally,we dem.nstrated successfully the ability of the 405 nm.LIF and the hyperspectral im.ging technique to detect finger print traces of BCHm. on white cellulose fabric from.a distance of 15 m.and a detection lim.t of 1 m./cm.(2).

关键词： Hyperspectral im.ging Rem.te trace detection BCHm. Laser induced fluorescence

High tem.erature oxidation behavior of alum.nide on a Ni-based single crystal superalloy in different surface orientations

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Progress in Natural Science:m.terials International 2014年第2期24卷 163-170页

作者： Faham.yah H.Latief Koji Kakehi el-Sayed m.sherif Departm.nt of m.chanical Engineering Tokyo Metropolitan University Center of Excellence for Research in Engineering m.terials (CEREm. Advanced Manufacturing Institute King Saud University electrochem.stry and Corrosion Laboratory Department of Physical Chemistry National Research Centre (NRC)

An investigation on oxidation behavior of coated Ni-based single crystal superalloy in different surface orientations has been carried out at1100 ℃. It has been found that the {100} surface shows a better oxidation resistance than the {110} one, which is attributed that the {110}surface had a slightly higher oxidation rate when com.ared to the {100} surface. The experim.ntal results also indicated that the anisotropic oxidation behavior took place even with a very sm.ll difference in the oxidation rates that was found between the two surfaces. The differences of the topologically close packed phase am.unt and its penetration depth between the two surfaces, including the ratio of α-Al2O3 after 500 h oxidation, were responsible for the oxidation anisotropy.

关键词： Ni-based superalloy Oxidation behavior m.crostructure Alum.nide coating Crystallographic orientation

An approach to evaluate the efficiency of γ-ray detectors to determ.ne the radioactivity in environm.ntal sam.les

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Chinese Physics C 2014年第6期38卷 60-66页

作者： m.ham.d.S.Badawi Ahm.d.m.el-Khatib Sam.h.m.Diab sherif.S.Nafee Ekram.A.el-m.llah Physics Departm.nt Faculty of Science Alexandria University 21511 Alexandria Egypt

This work provides an approach to determ.ne the efficiency of T-ray detectors with a good accuracy in order to determ.ne the concentrations of either naturally occurring or artificially prepared radionuclides. This approach is based on the efficiency transfer form.la （ET）, the effective solid angles, the self- absorptions of the source m.trix, the attenuation by the source container and the detector housing m.terials on the detector efficiency. The experim.ntal calibration process was done using radioactive （Cylindrical ＆ m.rinelli） sources, in different dim.nsions, that contain aqueous 152Eu radionuclide. The com.arison point to a fine agreem.nt between the experim.ntal m.asured and calculated efficiencies for the （NaI ＆ HPGe） detectors using volum.tric radioactive sources.

关键词： y-ray detector efficiency efficiency transfer effective solid angles radioactive source

Analysis of m.gnetic Resistive Flow of Generalized Brinkm.n Type Nanofluid Containing Carbon Nanotubes with Ram.ed Heating

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Com.uters, m.terials & Continua 2021年第4期67卷 1069-1084页

作者： m.ham.ad Saqib Ilyas Khan Sharidan Shafie Ahm.d Qushairi m.ham.d el-Sayed m.sherif Departm.nt of m.them.tical Sciences Faculty of ScienceUniversiti Teknologi MalaysiaJohor Bahru81310Malaysia Faculty of m.them.tics and Statistics Ton Duc Thang UniversityHo Chi Minh CityVietnam Center of Excellence for Research in Engineering m.terials(CEREm. King Saud UniversityAl-Riyadh11421Saudi Arabia Departm.nt of Physical Chem.stry Electrochemistry and Corrosion LaboratoryNational Research CentreCairo12622Egypt

In recent tim.s,scientists and engineers have been m.st attracted to electrically conducted nanofluids due to their num.rous applications in various fields of science and *** exam.le,they are used in cancer treatm.nt(hypertherm.a),m.gnetic resonance im.ging(m.I),drugdelivery,and m.gnetic refrigeration(m.).Bearing in m.nd the significance and im.ortance of electrically conducted nanofluids,this article aim. to study an electrically conducted water-based nanofluid containing carbon nanotubes(CNTs).CNTs are of two types,single-wall carbon nanotubes(SWCNTs)and m.ltiple-wall carbon nanotubes(m.CNTs).The CNTs(SWCNTs and m.CNTs)have been dispersed in regular water as base fluid to form.waterCNTs *** Brinkm.n Type nanofluid m.del is developed in term. of tim.-fractional *** ram.ed heating and sinusoidal oscillations conditions have been taken at the *** m.del has been solved for exact analytical solutions via the fractional Laplace transform.*** exact solutions have been graphically studied to explore the physics of various pertinent flow param.ters on velocity and tem.erature *** em.irical results reveal that the tem.erature and velocity fields decreased with increasing values of fractional param.ters due to variation in therm.l and m.m.ntum.boundary *** is also indicated that the isotherm.l velocity and tem.erature are higher than ram.ed velocity and tem.erature.

关键词： Nanofluid fractional derivatives Brinkm.n type fluid exact solutions

Double Deep Q-Network m.thod for Energy Efficiency and Throughput in a UAV-Assisted Terrestrial Network

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Com.uter System. Science & Engineering 2023年第7期46卷 73-92页

作者： m.ham.d Am.ne Ouam.i Reem.Alkanhel Daljeet Singh el-sayed m.el-kenaway sherif S.m.Ghoneim University Grenoble Alpes CNRSGrenoble INPLIGDRAKKAR Teams38000GrenobleFrance Laboratoire d’inform.tique m.dical Universitéde BejaiaTarga OuzemourQ22R+475Algeria Departm.nt of Inform.tion Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Departm.nt of Research and Developm.nt Centre for Space ResearchSchool of Electronics and Electrical EngineeringLovely Professional UniversityPhagwara144411India Departm.nt of Com.unication and electronics Delta Higher Institute of Engineering and TechnologyMansouraEgypt electrical Engineering Departm.nt College of EngineeringTaif UniversityP.O.BOX 11099Taif21944Saudi Arabia

Increasing the coverage and capacity of cellular networks by deploying additional base stations is one of the fundam.ntal objectives of fifth-generation(5G)***,it leads to perform.nce degradation and huge spectral consum.tion due to the m.ssive densification of connected devices and sim.ltaneous access *** m.et these access conditions and im.rove Quality of Service,resource allocation(RA)should be carefully ***,RA problem. are nonconvex optim.zations,which are perform.d using heuristic m.thods,such as genetic algorithm.particle swarm.optim.zation,and sim.lated ***,the application of these approaches rem.ins com.utationally expensive and unattractive for dense cellular ***,artificial intelligence algorithm. are used to im.rove traditional RA *** learning is a prom.sing tool for addressing resource m.nagem.nt problem. in wireless *** this study,we investigate a double deep Q-network-based RA fram.work that m.xim.zes energy efficiency(EE)and total network throughput in unm.nned aerial vehicle(UAV)-assisted terrestrial ***,the system.is studied under the constraints of ***,the optim.zation problem.is form.lated as a m.xed integer nonlinear *** this fram.work,we evaluated the effect of height and the num.er of UAVs on EE and ***,in accordance with the experim.ntal results,we com.are the proposed algorithm.with several artificial intelligence *** results indicate that the proposed approach can increase EE with a considerable throughput.

关键词： UAV terrestrial network reinforcem.nt learning m.Wave resource allocation

Stability Scrutinization of Agrawal Axisym.etric Flow of Nanofluid through a Perm.able m.ving Disk Due to Renewable Solar Radiation with Sm.luchowski Tem.erature and m.xwell Velocity Slip Boundary Conditions

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Com.uter m.deling in Engineering & Sciences 2023年第2期134卷 1371-1392页

作者： Um.ir Khan Aurang Zaib Anuar Ishak Iskandar Waini el-Sayed m.sherif Dum.tru Baleanu Departm.nt of m.them.tical Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi43600Malaysia Departm.nt of m.them.tics and Social Sciences Sukkur IBA UniversitySukkur65200Pakistan Departm.nt of m.them.tical Sciences Federal Urdu University of ArtsScience&TechnologyKarachi75300Pakistan Fakulti Teknologi Kejuruteraan m.kanikal dan Pem.uatan Universiti Teknikal Malaysia MelakaMelaka76100Malaysia m.chanical Engineering Departm.nt College of EngineeringKing Saud UniversityRiyadh11423Saudi Arabia Departm.nt of m.them.tics Cankaya UniversityAnkara06790Turkey Institute of Space Sciences Magurele077125Romania Departm.nt of m.dical Research China Medical University HospitalChina Medical UniversityTaichung40447Taiwan

The utilization of solar energy is essential to all living things since the beginning of *** addition to being a constant source of energy,solar energy(SE)can also be used to generate heat and *** technology enables to convert the solar energy into electricity by using therm.l solar *** energy is perhaps the m.st easily accessible and plentiful source of sustainable ***-based nanofluid has been considered as a m.thod to im.rove solar collector perform.nce by absorbing incom.ng solar energy *** goal of this research is to explore theoretically the Agrawal axisym.etric flow induced by Cu-water nanofluid over a m.ving perm.able disk caused by solar ***,the im.acts of m.xwell velocity and Sm.luchowski tem.erature slip are incorporated to discuss the fine points of nanofluid flow and characteristics of heat *** prim.ry partial differential equations are transform.d to sim.larity equations by em.loying sim.larity variables and then utilizing bvp4c to resolve the set of equations *** current num.rical approach can produce double solutions by providing suitable initial *** addition,the results revealed that the im.act of solar collector efficiency enhances significantly due to nanoparticle volum. *** suction param.ter delays the boundary layer ***,stability analysis is perform.d and is found that the upper solution is stable and physically trustworthy while the lower one is unstable.

关键词： Agrawal axisym.etric flow solar energy nanofluid heat transfer slip conditions