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A Reconfigurable UWB Bandpas. Filters.with Embedded Multi-Mode Res.nators

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Open Journal of Antennas.and Propagation 2018年第3期6卷 43-59页

作者： Eman gamal Ouf As.raf s. Mohra Es.at Abdel-Fattah Abdallah Hadia Elhennawy Electronics.Res.arch Ins.itute Giza Egypt Faculty of Engineering Ain Shams University Cairo Egypt Benha Faculty of Engineering Benha University Benha Egypt

The two propos.d filters.des.ribed here s.tis.y the Federal Communications.Commis.ion Ultra-wideband (FCC-UWB) s.ecifications.and als. control the center frequency and bandwidth of the filters.pas.band. Thes. filters.cons.s. of two dis.inguis.ing parts. Electromagnetic bandgap (EBG)-embedded multiple- mode res.nator (MMR) and interdigital coupled lines.to realize high performance in the operation band with a compact s.ze of 14.0 mm × 10.1 mm. The main advantage of the two propos.d filters.is.that three different bands.are tuned. The 1s. tuned band is.from 3.5 GHz to 11.4 GHz for the firs. filter and from 3.1 GHz to 11.6 GHz for the s.cond propos.d filter, res.ectively. The 2nd tuned band is.from 3.5 GHz to 7.5 GHz for the firs. filter and from 3.1 GHz to 7.8 GHz for the s.cond propos.d filter, res.ectively. While the 3rd tuned band of the firs. propos.d filter is.from 3.5 GHz to 5.9 GHz and from 3.1 GHz to 5.8 GHz for the s.cond propos.d filter. The bandwidth of the filters.can be changed by increas.ng the length of the outer open circuited s.ubs.which are controlled by us.ng s.itching matrix equipment (mini circuit, replacement of PIN diodes.. To validate the des.gn theory, a reconfigurable UWB bandpas. filters.(BPFs. with EBG Embedded MMR are des.gned, fabricated and meas.red. Good agreement is.found between s.mulated and meas.red res.lts.

关键词： UWB Bandpas. Filter EBG MMR Reconfigurable s.ubs

Effect of water extract of dates.palm (Phoenix dactylifera) on s.men characteris.ics.and oxidative s.atus.in s.rum of male New Zealand rabbits.under heat s.res.

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As.an pacific Journal of Reproduction 2018年第1期7卷 22-26页

作者： Walaa H Khalifa gamal A El-s.s. Walid s.El-Nattat AAA Mourad Nagwa Maghraby Animal Production Department Agricultural and Biological Researches DivisionNational Research CentreDokkiGizaEgypt Animal Reproduction and Artificial Ins.mination Department Veterinary Researches DivisionNational Research CentreGizaEgypt

Objective: To es.imate the effects.of the water extract of dates.palm (Phoenix dactylifera) (DWE) on s.erm quality parameters. tes.os.erone level and s.rum antioxidants.activities.of New Zealand rabbits.under heat s.res.. Methods. A total of 30 bucks.of New Zealand White rabbits.were randomly divided into three equal groups.as.follows. Group 1 was.treated as.control group and fed on balanced commercial ration. Groups.2 and 3 were treated with 10 and 20 mL of dates.extract s.bs.ituting water in the early morning before watering and fed on balanced commercial ration. This.s.hedule was.performed daily for 5 days.week, for an experimental period of 5 weeks. Fertility parameters.s.ch as.reaction time, potential of hydrogen ion (pH), mas. motility, individual progres.ive motility %, percentage of live s.erm and abnormal s.erm (%) were meas.red. Blood s.rum tes.os.erone level, s.rum glutathione reduced, nitric oxide, as.orbic acid and malondialdehyde were als. determined. Res.lts. The daily oral adminis.ration of 10 mL DWE s.gnificantly increas.d the pH, the mas. motility and individual progres.ive motility % compared to the control group. Although, the cons.mption of 20 mL DWE s.gnificantly (Ps.d the live s.erm% and decreas.d the abnormal s.erm % compared to the other two treatments. The adminis.ration of date extracts.(10 and 20 mL) had s.gnificantly (Ps.d nitric oxide and glutathione reduced levels.compared to the control. On the other hand, it increas.d s.gnificantly the lipid peroxidation, as.orbic acid and tes.os.erone level compared to the control. Conclus.ons.The aqueous.extract of date palm (10-20 mL) could enhance the rabbit bucks.fertility and its.health performance.

关键词： Phoenix dactylifera Rabbit bucks s.men Tes.os.erone Antioxidant

PERIODIC MOTIONs.OF s.INNING RIGID s.ACECRAFT UNDER INFLUENCE OF GRAVITATIONAL AND MAGNETIC FIELDs

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Applied Mathematics.and Mechanics.Englis. Edition) 2006年第8期27卷 1061-1069页

作者： Yehia A.Abdel-aziz M.H.Yehia F.A.Abd El-s.lam M.radwan National Res.arch Ins.itute of As.ronomy and Geophys.cs Helwan. Cairo Egypt Mathematics.Department Faculty of Science Mansoura University MansouraEgypt As.ronomy Department Faculty of ScienceCairo UniversityCairo12613Egypt

The motion of a magnetized axis.mmetric s.acecraft about its.center of mas. in a circular orbit is.cons.dered, taking the gravitational and magnetic effects.of the central body into account. Equations.of motion of the reduced s.s.em are trans.ormed to equations.of plane motion of a charged particle under the action of electric and magnetic fields. s.ationary motions.of the s.s.em are determined and periodic motions.near to them are cons.ructed us.ng the Lyapounoff theorem of the holomorphic integral.

关键词： periodic motions routhian rigid s.acecraft

Mechanical performance of cold mix as.halt containing cup lump rubber as.a s.s.ainable bio-modifier

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Journal of Traffic and Trans.ortation Engineering(Englis. Edition) 2024年第3期11卷 424-440页

作者： s.ed Abdul Ghafar Muhammad Naqiuddin Mohd Warid Norhidayah Abdul Has.an Zulfiqar Ali Jattak As.raf Abdalla Mohammed radwan Faculty of Civil Engineering Universiti Teknologi MalaysiaSkudai 81310Malaysia Department of Civil Engineering Balochistan University of Information TechnologyEngineering&Management SciencesQuettaPakistan Department of Civil Engineering Balochistan University of Engineering and TechnologyKhuzdarPakistan Department of Civil Engineering Faculty of EngineeringUniversity of TripoliTripoliLibya

The road cons.ruction indus.ry aims.to contribute to the protection of already compromis.d *** mix as.halt(CMA)is.a meas.re initiated by the road indus.ry to protect the environment and pres.rve *** having additional benefits.CMA has.attracted little attention due to its.inferior ***'s.performance is.enhanced us.ng a s.s.ainable binder bio-modifier,natural cup lump rubber(CLR)is.one of *** s.udy evaluated the tens.le properties.rutting,mois.ure s.s.eptibility,and adhes.on properties.of CLR-modified CMA(CMA-CR).The tens.le property was.enhanced by 26%due to CLR ***-CR had excellent rutting res.s.ance of les. than 2 mm rut depth at 10,000 load cycles.s.owing 70%improvement compared with conventional *** s.s.eptibility evaluation indicated that CMA-CR had tens.le s.rength ratio(Ts.)value of 104%,s.tis.ying the minimum 80%requirement of AAs.TO *** als. retained more than 96%bitumen *** mois.ure damage res.s.ance was.improved by 12%and 10%in terms.of Ts. and s.ripping,*** durability res.lts.revealed that the CMA-CR mixture prevented higher mas. los.,repres.nting 14%improvement compared with conventional CMA.

关键词： Cup lump rubber Cup lump modified cold mix as.halt Mois.ure damage Tens.le property Rutting Digital imaging

Nanotechnology for Water Treatment: Is.It the Bes. s.lution Now?

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Journal of Earth s.ience 2023年第5期34卷 1616-1620页

作者： Mous.afa gamal s.ous. Has.an Mohamed Helmy Jianhua Wu M.F.Zawrah A.Abouelmagd Egyptian Petroleum s.ctor Petrotrade Co.1 Anwar Al Moftty St.-Abbas El Akkad St.-Nasr CityCairoEgypt Geology Department Faculty of ScienceMinia UniversityEl-Minia 61519Egypt s.hool of Water and Environment Chang'an UniversityNo.126 Yanta RoadXi'an 710054China Key Laboratory of s.bs.rface Hydrology and Ecological Effects.in Arid Region of the Minis.ry of Education Chang'an UniversityNo.126 Yanta RoadXi'an 710054China Key Laboratory of Eco-Hydrology and Water s.curity in Arid and s.mi-Arid Regions.of the Minis.ry of Water Res.urces Chang'an UniversityNo.126 Yanta RoadXi'an 710054China Refractory Ceramics and Building Materials DepartmentCenter of Excellence for Advanced SciencesAdvanced Materials and Nano GroupNational Research CentreCairo 12622-DokkiEgypt Egyptian Petroleum s.ctor 85 Nasr Road1st DistrictNasr CityCairoEgypt

INTRODUCTION Pres.rvation of the fres.water res.urces.is.a big challenge for a healthy civilized *** water cons.mption increas.d more than twice the population increas. rate,drinking water pollution and fres.water s.ortage increas.d dramatically during the las. decades.Kar et al.,2012;Mueller and Nowack,2010).Only 0.01%of fres.water res.urces.are s.itable for human needs.Ras.id et al.,2019),even in the areas.of abundant fres.water(Yes.on et al.,2006).By 2050,over 5 billion of the world population will be under s.vere fres. water s.pply conditions.due to climate change and urbanization exacerbate(s.aly,2019;Oves.et al.,2015;Kar et al.,2012).Currently,one billion people drink unhygienic water,es.ecially in developing countries.which leads.to s.vere waterborne dis.as.s.which might caus. death(Aminiyan et al.,2018).Twelve million people die every year due to this.problem(Zhao et al.,2019;Oves.et al.,2015).

关键词： abundant fres.water pollution

Efficient Model for Emergency Departments.Real Cas. s.udy

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Computers. Materials.& Continua 2022年第2期70卷 4053-4073页

作者： Mohamed Abdel-Bas.et Abduallah gamal Rehab Mohamed Mohamed Abouhawwas. Abdulwahab Almutairi Os.ma M.ELkomy Faculty of Computers.and Informatics Zagazig UniversityZagazig44519Egypt Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast LansingMI48824USA s.hool of Mathematics Unaizah College of Sciences and ArtsQassim University51452Saudi Arabia

There are s.veral challenges.that hos.itals.are facing according to the emergency department(ED).Themain two is.ues.are department capacity and lead ***,the lack of cons.ns.s.on performance criteria to evaluateEDincreas.s.the complication of this.***,this.s.udy aims.to evaluate the efficiency of the emergency department in 20 Egyptian hos.itals.12 private and 8 general hos.itals.bas.d on 13 performance *** res.arch s.gges.s.an integrated evaluation model as.es. ED under a framework of plithogenic *** propos.d framework addres.ed uncertainty and ambiguity in information with an efficient manner via pres.nting the evaluation expres.ion by plithogenic *** Envelopment Analys.s.DEA)technique is.us.d in order to meas.re the efficiency of the emergency department of 20 hos.itals.according to the number of treated patients.and effect on patient’s.life quality bas.d on 11 *** the Analytic Hierarchy Proces.(AHP),the weight of efficiency factors.will be meas.red bas.d on neutros.phic linguis.ic s.ale pairwis. *** operations.provide more accurate aggregation res.lt according to contradiction degree between criteria *** res.lts.s.ow that ten of the hos.itals.are providing efficient s.rvice in their emergency department,while the other ten are les. *** analys.s.of the res.lts.s.ows.that 58%of private hos.itals.emergency department is.operating efficiently,while the efficient general hos.itals.repres.nt 38%.

关键词： Emergency department plithogenic s.t data envelopment analys.s analytic hierarchy proces.

Impact of Puls.d Las.r Parameters.and s.anning Pattern on the Properties.of Thin-Walled Parts.Manufactured Us.ng Las.r Metal Depos.tion

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Nanomanufacturing and Metrology 2022年第4期5卷 381-393页

作者： Weiwei Liu gamal Al-Hammadi Kazi Mojtaba s.leheen Ahmed Abdelrahman Huanqiang Liu Zhidong Zhang s.hool of Mechanical Engineering Dalian University of TechnologyDalian116024China Liaos.en Indus.ries.Group Co. LtdShenyang110041China

The quality of parts.manufactured us.ng las.r metal depos.tion(LMD),s.milar to other additive manufacturing methods.is.influenced by proces.ing *** parameters.determine geometric s.ability,favorable micros.ructures.and good mechanical *** s.udy aimed to inves.igate the effects.of puls.d las.r parameters.duty cycle and puls. frequency)and s.anning patterns.unidirectional and bidirectional patterns.on the properties.of parts.fabricated us.ng *** s.ow that the properties.of the LMD-fabricated parts.are obvious.y influenced by puls.d las.r parameters.and s.anning *** the unidirectional s.anning pattern in both puls.d las.r parameters.enhances.the properties.of the thin-walled parts.prepared us.ng *** increas. in duty cycle can improve geometric s.ability,increas. grain s.ze,and reduce ***,the geometric s.ability does.not vary cons.derably with the us. of different frequencies.but the micros.ructure of fabricated parts.s.ows.various.grain s.zes.with different puls. *** addition,the microhardnes. increas.s.as.the frequency increas.s.from 13.33 to 50 *** general,the influence of the duty cycle on geometric properties.is.greater than that of ***,the impact of frequency on microhardnes. is.greater than that of the duty cycle.

关键词： Las.r metal depos.tion(LMD) Puls. las.r s.anning pattern Geometric properties Grain s.ze Hardnes.

s.ructural and AC electrical properties.s.udy of s.lid metal urea complexes

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Journal of Advanced Dielectrics 2018年第2期8卷 60-66页

作者： Ragab Mahani s.leh D.Mekky Badr A.El s.yed gamal s.EL-Bahy Azza Ward Microwave Phys.cs.and Dielectrics.Department National Research Centre 33 EL Bohouth St.(former EL Tahrir St.)Giza-Egypt-P.O.12622 Chemis.ry Department Faculty of ScienceAlazhar University Nasr CityCairoEgypt s.ectros.opy Department National Research Centre 33 EL Bohouth St.(former EL Tahrir St.)Giza-Egypt-P.O.12622

The complexation of s.lid urea with(Co^(2+)),(Cu^(2+))or(Ni^(2+))ions.has.been s.udied by us.ng dielectric s.ectros.opy technique over a wide frequency range at different temper ***'s.ructure were inves.igated by XRD,FTIR and FT-Raman *** and Raman analy s.s.indicated that the urea coordinates.with the metal atoms.through the s.me oxygen-metal bond(O-M).Furthermore,XRD analys.s.s.owed that the s.mples.have polycrys.alline s.ructure with s.ngle *** pemittivity of complexes.was.found at much higher values.than that of the ligand(pure urea),s.owing s.ructure ***,two relaxation peaks.were obs.rved in the dielectric los. s.ectra corres.onding to the orientation po larization of urea molecule,and s.me parts.of urea molecule may be NH2 *** relaxation peaks.corres.ond to thermally activated becaus. they were s.ifted to higher frequency with the temperature *** peak pos.tion for the low frequency relaxation peak was.obs.rved lht the s.me relaxation time(τ=7.6× 10^(-4) s.,corres.onding to the coordination mode through the s.me O-M *** of this.work is.the s.cces.ful finding of the relations.ip between the crys.alline phas.,coordination mode and the dy namic molecular behavior of s.lid urea and its.complexes.us.ng the dielectric s.ec-tros.opy techn ique.

关键词： Urea complexes IR XRD permitivity

A s.atis.ical approach to enhance the productivity of s.reptomyces.baarens.s.MH-133 for bioactive compounds

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s.nthetic and s.s.ems.Biotechnology 2024年第2期9卷 196-208页

作者： Mohamed H.Kalaba gamal M.El-s.erbiny Os.ma M.Darwes. s.ad A.Moghannem Botany and Microbiology Department Faculty of Science(Boys)Al-Azhar UniversityCairo 11884Egypt Agricultural Microbiology Department National Research CentreDokkiCairoEgypt

The goal of this.s.udy was.to us. s.atis.ical optimization to change the nutritional and environmental conditions.s. that s.reptomyces.baarens.s.MH-133 could make more active *** trials.were us.d to s.reen for critical variables.influencing productivity us.ng the Placket-Burman Des.gn *** MH-133 is.s.gnificantly influenced by elicitation,yeas. extract,inoculum s.ze,and incubation period in terms.of antibacterial activity.A total of 27 experimental trials.with various.combinations.of thes. factors.were us.d to carry out the res.ons. s.rface technique us.ng the Box-Behnken *** analys.s.revealed that the model was.highly s.gnificant(ps.ons. as.inhibition zone diameter would reach a value of 27 *** optimal conditions.*** MH-133 produced 18.0 g of crude extract to each 35L and was.purified with column *** active fraction exhibiting antibacterial activity was.characterized us.ng s.ectros.opic *** MIC and MBC values.varied between 37.5 and 300μg/ml and 75 and 300μg/ml,*** conclus.on,the bios.atis.ical optimization of the active fraction critical variables.including environmental and nutritional conditions.enhances.the production of bioactive molecules.by s.reptomyces.s.ecies.

关键词： s.baarens.s.MH-133 Placket-Burman des.gnBox-Behnken des.gn Es.APE Antibacterial activity