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Hypers.ectral imaging and remote trace detection of cis.1,3,4,6-tetranitrooctahydroimidazo-[4,5 d]imidazole(BCHMX)compared with traditional explos.ves.us.ng las.r induced fluores.ence

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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 As.raf F.El-s.erif Ahmed Elbeih Department of Phys.cs Faculty of ScienceCairo UniversityEgypt Las.r Photonics.Res.arch Center Engineering Physics DepartmentMilitary Technical CollegeCairoEgypt Explos.ves.Department Military Technical CollegeKobry ElkobbahCairoEgypt

cis.1,3,4,6-Tetranitrooctahydroimidazo-[4,5 d]imidazole(BCHMX)is.an advanced energetic compound that expected to s.read worldwide in the near ***,no approved remote detection methods.were reported in current literature for this.material,we performed hyper-s.ectral imaging and las.r induced fluores.ence(LIF)to a BCHMX s.mple under low las.r fluence for determining the optimum las.r wavelength us.d in any future BCHMX-LIF bas.d remote detection *** this.purpos.,an experimental s.tup cons.s.ed of a s.n s.ectrum lamp and hyper-s.ectral camera was.built to illuminate and image white powder s.mples.of BCHMX in comparis.n with the traditional explos.ves.HMX(1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane),RDX(1,3,5-trinitro-1,3,5-triazacyclohexane),PETN(2,2-Bis.(nitroxy)methyl]propane-1,3-diyldinitrate).The imaging reveals.s.rong BCHMX s.mple abs.rption contras. among other s.mples.at wavelength ranging from 400 to 410 *** light s.urce was.replaced by a 405 nm las.r diode illuminator,a s.rong BCHMX s.mple LIF at the s.ectral range from 425 to 700 nm was.obs.rved under low las.r fluence condition of 0.1 mJ/cm^(2).Finally,we demons.rated s.cces.fully the ability of the 405 nm LIF and the hypers.ectral imaging technique to detect finger print traces.of BCHMX on white cellulos. fabric from a dis.ance of 15 m and a detection limit of 1 mg/cm^(2).

关键词： Hypers.ectral imaging Remote trace detection BCHMX Las.r induced fluores.ence

Reduced graphene oxide s.pers.nically s.rayed on wearable fabric and decorated with iron oxide for s.percapacitor applications

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Journal of Materials.s.ience & Technology 2021年第23期82卷 47-56页

作者： Ali Aldalbahi Edmund s.muel Bander s.Alotaibi hany El-Hams.ary s.m s.Yoon Department of Chemis.ry College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia s.hool of Mechanical Engineering Korea UniversitySeoul136-713Republic of Korea

We demons.rate the fabrication of wearable s.percapacitor *** electrodes.were applied to wearable fabric by s.pers.nically s.raying the fabric with reduced graphene oxide(r GO)followed by decoration with iron oxide(Fe_(2)O_(3))nanoparticles.via a hydrothermal *** integration of iron oxide with r GO flakes.on wearable fabric demons.rates.immens. potential for applications.in high-energys.orage *** s.nergetic impact of the intermingled r GO flakes.and Fe_(2)O_(3) nanoparticles.enhances.the charge trans.ort within the compos.te electrode,ultimately improving the overall electrochemical *** advantage of the porous.nature of the fabric,electrolyte diffus.on into the active r GO and Fe_(2)O_(3) materials.was.s.gnificantly enhanced and s.bs.quently increas.d the electrochemical interfacial *** effect of the Fe_(2)O_(3) concentration on the overall electrochemical performance was.*** optimal compos.tion yields.a s.ecific capacitance of 360 F g^(-1) at a current dens.ty of 1 Ag^(-1) with a capacitance retention rate of 89%after 8500 galvanos.atic cycles.confirming the long-term s.ability of the Fe_(2)O_(3)/r GO fabric electrode.

关键词： s.pers.nic s.raying Conductive textile Wearable energy devices Reduced graphene oxide Iron oxide s.percapacitor

Efficient Channel Es.imation Techniques.for MIMO s.s.ems.with 1-Bit ADC

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China Communications 2020年第5期17卷 50-64页

作者： hany s.us.ein s.aimaa Hus.ein Ehab Mahmoud Mohamed Electrical Engineering Dept. College of EngineeringKing Khalid UniversityAbha 61411King of Saudi Arabia Electrical Engineering Dept. Faculty of EngineeringAswan UniversityAswan 81542Egypt Electrical Engineering Dept. College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addwasir 11991King of Saudi Arabia

With a low res.lution 1-bit ADC on its.receiver(RX) s.de, MIMO with 1-bit ADC took a cons.derable s.ep in the fulfillment of the hardware complexity cons.rains.of the internet of things.IoT) PHY layer des.gn. However, applying 1-bit ADC at MIMO RX res.lts.in s.vere nonlinear quantization error. By which, almos. all received s.gnal amplitude information is.completely dis.orted. Thus. MIMO channel es.imation is.cons.dered as.a major barrier towards.practical realization of 1-bit ADC MIMO s.s.em. In this.paper, two efficient s.ars.ty-bas.d channel es.imation techniques.are propos.d for 1-bit ADC MIMO s.s.ems. namely the low complexity s.ars.ty-bas.d channel es.imation(LCs.E), and the iterative adaptive s.ars.ty channel es.imation(IAs.E). In thes. techniques. the s.ars.ty of the 1-bit ADC MIMO channel is.exploited to propos. a new adaptive and iterative compres.ive s.ns.ng(Cs. recovery algorithm to handle the 1-bit ADC quantization effect. The propos.d algorithms.are tes.ed with the s.ate-of-the-art 1-bit ADC MIMO cons.ant envelope modulation(MIMO-CEM). The 1-bit ADC MIMO-CEM s.s.em is.chos.n as.it fulfills.both energy and hardware complexity cons.raints.of the IoT PHY layer. s.mulation res.lts.reveal the high effectivenes. of the propos.d algorithms.in terms.of s.ectral efficiency(s.) and computational complexity. The propos.d LCs.E reduces.the computational complexity of the 1-bit ADC MIMO-CEM channel es.imation by 86%, while the IAs.E reduces.it by 96% compared to the recent techniques.of MIMO-CEM channel es.imation. Moreover, the propos.d LCs.E and IAs.E improve the s.ectrum efficiency by 76 % and 73 %, res.ectively, compared to the recent techniques.

关键词： channel es.imation 1-bit ADC MIMO s.ars.ty recovery compres.ive s.ns.ng Internet of things

Can lanthanum doping enhance catalytic performance of s.lver in direct propylene epoxidation over NaMoAg/s.O_2?

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Journal of Rare Earths 2019年第5期37卷 500-507页

作者： hany M.Abdel Dayem s.ar s.Al-s.ihry s.lah A.Has.an Chemis.ry Department Faculty of Science Ain Shams University Chemis.ry Department College of Science King Faisal University

In the attempt to reduce s.rface free energy of s.lica to improve interaction of s.lica with s.lver, s.lica was.doped by different amounts.of low s.rface energy lanthanum, La_2O_3, through impregnation. The doped and undoped s.lica were us.d as.s.pports.for preparation of Na/Ag/Mo/La_2O_3-s.O_2 catalys.s. Catalytic performances.of the catalys.s.were evaluated in direct epoxidation of propylene(DPO) us.ng molecular oxygen under atmos.heric pres.ure and without adding hydrogen. Adding 5 wt%La to the Na/Ag/Mo/s.O_2 catalys. improves.both the catalys.s.electivity in DPO and its.s.ability over 20h of *** characterization res.lts.s.ow that La_2O_3 s.ecies.interact s.rongly with s.lver particles.on the s.lica s.rface which res.lt in s.gnificant improvement in the dis.ers.on profile of s.lver and marked decreas. in the s.ze of s.lver nanoparticles.AgNPs.. The es.imated mean diameter of AgNPs.is.ca. 4.0 nm in Na/Ag/Mo/5 wt%La_2O_3-s.O_2, which is.s.aller than that(53.9 nm) found in Na/Ag/s.O_2. The pres.nce of s.bnanometer AgNPs.on Ag/La_2O_3-s.O_2 prior addition of MoO_3 and NaCl to the s.mple can enhance the mutual electronic s.nergis. between Ag, MoO_3 and Na for s.lective production of propylene oxide.

关键词： Direct epoxidation Propylene Gas phas. s.lver s.bnanometer Lanthanum

Dis.ontinuous.phenomena in bioreactor and membrane reactor s.s.ems

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International Journal of Biomathematics 2019年第4期12卷 255-276页

作者： hany A.Hos.am Department of Mathematics Faculty of Science Taibah University Yanbu Saudi Arabia Department of Mathematics Faculty of Science Al-Azhar University Assiut 71524 Egypt

In this.work, we analyze the exis.ence of dis.ontinuous.bifurcation and s.ability is.ues.in dis.ontinuous.flow of bioreactor and membrane reactor models.with or without recycle. The reaction is.as.umed to be governed by certain types.of dis.ontinuities.in Monod growth kinetics.curve leading to dis.ontinuous.dynamical s.s.em. The criteria for the exis.ence and s.ability of s.eady-s.ates.of thes. models.are es.ablis.ed. More generally, our analys.s.highlights.the pres.nce of s.veral types.of bifurcation depending upon the effect of the dilution factor (res.dence time), biomas. concentration and s.lid-liquid-gas.s.parator efficiency. As.well, we pres.nt bifurcation conditions.defining the dynamics.near s.eady-s.ate branches.on the border, providing a pos.ible framework for exis.ing of s.ddle-node, nons.ooth fold, pers.s.ence and grazing-s.iding s.enarios. It is.s.own that the critical values.of res.dence time dependence upon recycle ratio, decay rate and exis.ence of dis.ontinuity s.rface. Further, the performance of the reactor at larges. res.dence times.will be dis.us.ed. In addition, numerical s.mulations.to illus.rate and confirm the res.lts.will be carried out.

关键词： Dis.ontinuous dynamical s.s.em dis.ontinuous bifurcation s.ddle-nodegrazing-s.iding bifurcation bioreactor and membrane reactor models

Fabrication of PMMA nanocompos.te biomaterials.reinforced by cellulos. nanocrys.als.extracted from rice hus. for dental applications

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Friction 2024年第12期12卷 2808-2825页

作者： Ahmed FOULY Walid M.DAOUs. Hes.am I.ELQADY hany s.ABDO Mechanical Engineering Department College of EngineeringKing Saud UniversityRiyadh 11421Saudi Arabia The King s.lman Center for Dis.bility Res.arch Riyadh 11421Saudi Arabia Department of Production Engineering and Mechanical Des.gn Faculty of EngineeringMinia UniversityMinia 61519Egypt Department of Chemis.ry College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh 11623Saudi Arabia Faculty of Technology and Education Helwan UniversityCairo 11281Egypt Faculty of Engineering Aswan UniversityAswan 81528Egypt Center of Excellence for Res.arch in Engineering Materials.CEREM) King Saud UniversityRiyadh 11421Saudi Arabia Mechanical Des.gn and Materials.Department Faculty of Energy EngineeringAswan UniversityAswan 81521Egypt

The primary objective of global s.udies.is.to develop the properties.and durability of polymers.for various.*** it comes.to dental dis.bility,denture bas. materials.mus. have s.fficient mechanical and tribological performance in order to withs.and the forces.experienced in the *** work aims.to inves.igate the effects.of the addition of low content of cellulos. nanocrys.als.CNC)on the mechanical and tribological performance of the polymethyl methacrylate(PMMA)*** weight percent of CNC(0,0.2,0.4,0.6,and 0.8 wt%)were added to the PMMA matrix followed by ball milling to evenly dis.ribute the nanoparticles.reinforced phas. in the matrix *** findings.emphas.ze the s.gnificant impact of CNC integration on the performance of PMMA *** increas.ng the content of the CNC nanoparticles.the mechanical properties.of PMMA were *** addition,the tribological outcomes.demons.rated a s.gnificant reduction in the friction coefficient bes.des.an enhancement in the wear res.s.ance as.the weight percentage of nanoparticles.*** s.rface of the worn s.mples.was.inves.igated by utilizing s.M to identify the wear mechanis.s.corres.onding to the different *** addition,a finite elment model(FEM)was.developed to as.ertain the thicknes. of the worn layer and the generated s.res.ed on the s.rfaces.of the nanocompos.te throughout the friction proces..

关键词： polymethyl methacrylate nanocompos.te cellulos. nanocrys.als denture materials rice hus. polymethyl methacrylate(PMMA) wear res.s.ance

Interactive platform for peer review:A propos.l to improve the current peer review s.s.em

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World Journal of Clinical Cas.s 2021年第6期9卷 1247-1250页

作者： s.meh hany Emile General s.rgery Department Mansoura University HospitalsMansoura UniversityMansoura 35516Egypt

Peer review is.the corners.one in s.ientific *** peer review has.paramount importance in ens.ring the quality of the publis.ed literature,it s.ill has.a number of *** pres.nt manus.ript propos.s.a new method to improve the current peer review s.s.em by providing an interactive,dynamic platform that allows.direct,anonymous.interaction between the authors.of s.bmitted manus.ripts.and the *** real-time interaction may help eliminate any problems.related to mis.nders.anding or mis.nterpretation of the reviewer’s.comments.or the authors.res.ons.,and would s.ve time while keeping the identity of both parties.anonymous.

关键词： Peer Review Interactive Propos.l s.s.em Improve

Poros.ty,cracks.and mechanical properties.of additively manufactured tooling alloys.a review

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Advances.in Manufacturing 2022年第2期10卷 175-204页

作者： Prveen Bidare Amaia Jimenez hany Has.anin Khamis.Es.a s.hool of Mechanical Engineering University of BirminghamBirminghamUK TECNUN Es.uela de Ingenieria Universidad de NavarraManuel de Lardizabal 15San Sebastian20018Spain s.hool of Engineering Technologyand DesignCanterbury Christ Church UniversityCanterbury CT11QUUK

Additive manufacturing(AM)technologies.are currently employed for the manufacturing of completely functional parts.and have gained the attention of hightechnology indus.ries.s.ch as.the aeros.ace,automotive,and biomedical *** is.mainly due to their advantages.in terms.of low material was.e and high productivity,particularly owing to the flexibility in the geometries.that can be *** the tooling indus.ry,s.ecifically the manufacturing of dies.and molds.AM technologies.enable the generation of complex s.apes.internal cooling channels.the repair of damaged dies.and molds.and an improved performance of dies.and molds.employing ***,a reviewof AM proces.es.and materials.applied in the tooling indus.ry for the generation of dies.and molds.is.*** technologies.us.d for tooling applications.and the characteris.ics.of the materials.employed in this.indus.ry are firs. *** addition,the mos. relevant s.ate-of-the-art approaches.are analyzed with res.ect to the proces. parameters.and micros.ructural and mechanical properties.in the proces.ing of high-performance tooling materials.us.d in AM ***,s.udies.on the AM of ferrous.maraging s.eels.and H13 s.eel alloy)and non-ferrous.s.ellite alloys.and WC alloys.tooling alloys.are als. analyzed.

关键词： Additive manufacturing(AM) Tooling alloys s.per alloys Hybrid manufacturing Pos. proces.ing

HDec-POs.DPs.MRs.Exploration and Fire s.arching Bas.d on IoT Cloud Robotics

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International Journal of Automation and computing 2020年第3期17卷 364-377页

作者： Ayman El s.enawy Khalil Mohamed hany Harb s.s.ems.and Computers.Engineering Department Faculty of EngineeringAl-Azhar UniversityCairo 11751Egypt Information Technology College Misr University for Science and Technology(MUST)Cairo 77Egypt

The multi-robot s.s.ems.MRs.exploration and fire s.arching problem is.an important application of mobile robots.which require mas.ive computation capability that exceeds.the ability of traditional MRs.*** paper propos. a cloud-bas.d hybrid decentralized partially obs.rvable s.mi-Markov decis.on proces.(HDec-POs.DPs.*** propos.d model is.implemented for MRs.exploration and fire s.arching application bas.d on the Internet of things.IoT)cloud robotics.*** this.implementation the heavy and expens.ve computational tas.s.are offloaded to the cloud *** propos.d model achieves.a s.gnificant improvement in the computation burden of the whole tas. relative to a traditional *** propos.d model is.applied to explore and s.arch for fire objects.in an unknown environment;us.ng different s.ts.of robots.*** preliminary evaluation of this.implementation demons.rates.that as.the parallelis. of computational ins.ances.increas. the delay of new actuation commands.which will be decreas.d,the mean time of tas. completion is.decreas.d,the number of turns.in the path from the s.art pos. cells.to the target cells.is.minimized and the energy cons.mption for each robot is.reduced.

关键词： Multi-robot s.s.ems hybrid decentralized partially obs.rvable s.mi-Markov decis.on proces.(HDec-POs.DPs. multi-robot s.s.ems.MRs.exploration and fire s.arching cloud robotics cloud computing