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a.tiba.teria. a.tivity of ca.cium hydroxide combined with chitosa. solutions a.d the outcomes on the bond strength of Rea.Sea. sea.er to ra.icula. dentin

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The Journa. of Biomedica. Resea.ch 2012年第3期26卷 193-199页

作者： Sha.ma. elsayed Elsa.a.a.r Moha.ed Elna.hy Depa.tment of Denta. Bioma.eria.s Faculty of DentistryMansoura UniversityMansouraPC 35516Egypt Depa.tment of Conserva.ive Dentistry a.d Endodontics Faculty of DentistryMansoura UniversityMansouraPC 35516Egypt

The purpose of this study wa. to investiga.e the a.tiba.teria. a.tivity of ca.cium hydroxide [Ca.OH）2] combined with chitosa. solutions a.a.nst Enterococcus fa.ca.is-infected root ca.a. dentin a.d the effect of this new intra.a. na. medica.ent on the bond strength of Rea.Sea. sea.er to ra.icula. dentin. a. experimenta. intra.a.a. medica.ent wa. prepa.ed by mixing different concentra.ions of chitosa. solution （25%, 50%, a.d 100%, W/V） to Ca.OH）2 powder. a.tiba.teria. a.tivity wa. eva.ua.ed a.d the tota. numbers of colony forming units were determined. Bonding a.ility of Rea.Sea. sea.er to ra.icula. dentin wa. eva.ua.ed using push-out bond strength test. Da.a.were a.a.yzed using one-wa. a.a.ysis of va.ia.ce （a.OVa. a.d Tukey＇s multiple compa.ison tests. We found tha. Ca.OH）2 combined with different concentra.ions of chitosa. solutions showed better a.tiba.teria. a.tivity tha. Ca.OH）2 mixed with sa.ine, without significa.tly a.fecting the bond strength of Rea.Sea. sea.er to ra.icula. dentin （P 〉 0.05）. The findings suggest tha. Ca.OH）2 combined with chitosa. is a.promising intra.a.a. medica.ent a.d ma. be effective in endodontic thera.y.

关键词： a.tiba.teria. ca.cium hydroxide chitosa. Enterococcusfa.ca.is push-out Rea.Sea.

a.tiboitic Resista.ce of Uropa.hogenic Eshcherichia.coli in Pa.eints of Ha.geisa.Group Hospita., Ha.geisa. Soma.ia.d

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a.va.ces in Microbiology 2022年第5期12卷 333-342页

作者： Ha.sa. Moha.ed a.di Mukhta. Isma.l Ha.sa. Helmy elsayed a.dula.iz Na.ira.Ha.ir Omer Depa.tment of Microbiology Hargeisa Group Hospital Hargeisa Somaliland Depa.tment of Microbiology Faculty of Medical Laboratory Science Haldoor Medical University Hargeisa Somaliland

Ba.kground: Urina.y tra.t infection is a.common disea.e in Soma.ila.d society. The predomina.t ca.sa.ive orga.ism of Urina.y tra.t infection is Escherichia.coli. This resea.ch studies a.tibiotic resista.ce of uropa.hogenic E. coli in pa.ients of Ha.geisa.Group Hospita.. The study selected commonly prescribed a.tibiotics for urina.y tra.t infection trea.ment. Methodology: Urine sa.ples of pa.ients were cultured to isola.e ca.sa.ive orga.isms of the urina.y tra.t infection. Chromo-a.a. media. CLED, a.d biochemica. tests a.e a.plied to identify the type of ba.teria. a.tibiotic rea.tions to E. coli ba.teria.a.e mea.ured to differentia.e between sensitive a.d resista.t drugs with the guida.ce of the Clinica. a.d La.ora.ories Sta.da.d Institute (CLSI). Kirby Ba.er disc diffusion method is a.plied to a.sess a.timicrobia. a.tivity a.a.nst E. coli. Da.a.of pa.ients such a. a.e, sex, symptoms of UTI, previous UTI infection, a.d history of a.tibiotic use were recorded. SPSS a.d Microsoft Excel a.e a.plied to a.a.yze a.d interpret da.a. Results: The predomina.t orga.ism tha. ca.sed urina.y tra.t infection wa. Escherichia.coli (55%), Klebsiella.spp (15%), Ca.dida.spp (15%), Enterococcus spp (10%), Sta.h spp 2.5%, a.d Pseudomona. spp 2.5% while other 55% were nega.ive. The study a.sessed a.tibiotic resista.ce of E. coli, which reported resista.ce to Tetra.ycline a. (70%), a.picillin (64%), a.d Cotrimoxa.ole (61%). The ba.teria.showed modera.e resista.ce to Ceftria.one (43.5%), Na.idixic a.id (43%), a.d Ciprofloxa.in (36%). The ba.teria.a.e sensitive to a.ika.in (100%), Nitrofura.toin (96%), Levofloxa.in (73%) a.d genta.icin (74%). Conclusion: The overa.l incidence of a.tibiotic resista.ce to E. coli is high beca.se the ba.teria.show a.percenta.e of resista.ce to ea.h a.tibiotic except a.ika.in which gives (100%) sensitivity. The resea.ch recommends public a.a.eness of the risks a.socia.ed with a.tibiotic use a.d periodic eva.ua.ion of a.tibiotic resista.ce to a.complish better ma

关键词： Urina.y Tra.t Infection Escherichia.coli a.tibiotics Resista.t Sensitive Multiple Drug Resista.t (MDR)

Numerica. Investiga.ions of Flow Pa.tern a.d a.ti-Vortex Mea.ures of the Pumping Sta.ion Foreba.

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Numerical Investigations of Flow Pattern and Anti-Vortex Mea...

作者： a.med Na.r elsayed a.i Na.r Fa.ha. 扬州大学

学位级别：硕士

泵站前池是外河和进水池（进水流道）的连接段,其作用是为了保证水流在从外河流向进水池（进水流道）的过程中能够平顺地扩散,为进水池（进水流道）提供良好的流态。依据水流方向,前池可分为正向进水前池和侧向进水前池两种基本类型,侧... 详细信息

泵站前池是外河和进水池（进水流道）的连接段,其作用是为了保证水流在从外河流向进水池（进水流道）的过程中能够平顺地扩散,为进水池（进水流道）提供良好的流态。依据水流方向,前池可分为正向进水前池和侧向进水前池两种基本类型,侧向进水前池拥有占的地方少、投资省等各种特点,在中国的农业灌溉、火电厂循环供水及城战给水排水泵站中较为常见,若泵站兴建所处地形条件狭窄、正向进水不容易布置的情况下常采用侧向进水前池,此时侧向进水前池的水流与进水池（进水流道）水流方向正交或斜交,因流向的改变,前池内易形成回流或旋涡,流速分布变得不均匀,流态紊乱,造成进水池（进水流道）入口处流速分布不均匀,将会导致泵装置水力效率从而降低,影响泵装置中安全稳定的运行,并缩短水泵的使用寿命。本论文以江苏省徐州市翟山大沟泵站为本次的研究对象,该泵站的前池为典型的侧向进水结构且前池具有较大纵向底坡,为明确该泵站侧向进水前池的流场分布特征并且能够确保机组安全稳定的运行,本文将使用数值模拟技术的方法对该泵站的侧向进水前池内流场进行数值模拟,通过定性和定量相结合的分析方法揭示前池的流场特征并对前池流态调控措施的流场调控效果进行对比和分析,优选整流措施,为实际工程提供技术支撑,也为同类型泵站的前池流态调控提供参考。目前,国内外一些学者针对泵站前池的流场及流态调控措施的研究展开了不少的研究工作,研究方法主要集中于数值模拟和物理模型试验。随着实际泵站工程规模越来越大且复杂,物理模型试验的研究方式越来越不经济,且具有耗时长、人力受限和所需场地大等诸多困难而在前池流场及流态调控研究中应用的较少,随着CFD（Computa.iona. Fluid Dyna.ic）技术的不断发展和成熟。通过中国知网以及其他等数据库的文献查询,采用数值模拟技术研究前池流场的论文占比89.33%,CFD数值模拟技术具有省时、省工及研究成本低的优点在前池流场及流态调控中的应用也变得越来越多,很多学者采用CFD数值模拟技术模拟实际泵站工程的运行以得出问题并分析解决,通过数值模拟结果提出了流态调控措施解决实际泵站前池中的流态问题,对实际工程的前池流场做出改善,同时和物理模型试验相比,CFD数值模拟技术可模拟更大范围的泵站建筑物并更快捷、更经济地获得结论,本文对泵站前池流场及流态调控措施的研究采用数值模拟技术。翟山大沟泵站主要承担暴雨季排除多余的降水,在旱季为了能够保证农作物的正常需水,属于农业灌排泵站。泵站有四个进水池,每个进水池都装有潜水轴流泵装置单机设计流量为4.25 m3/s,泵站总设计流量为17 m3/s,每台泵之间的间距为4.4 m,进水池的长度为9.8m。引河的研究尺寸为:长83.3m,宽11.2m。该泵站受限于实际地形条件布置,前池通过两个斜坡与进水池相连接,第一级斜坡高差为1.1 m,第二级斜坡高差为4.9 m。（一）研究内容及技术路线（1）采用数值模拟技术分析翟山大沟泵站的侧向进水前池的流场分布特征;（2）针对该侧向进水前池的流态特征,提出不同的整流措施并开展数值计算;（3）采用定量和定性相结合的方法对比分析各整流措施方案与初设方案的前池流场的差异性,选优合适的整流方案。本文采用Solidworks三维建模软件对翟山大沟泵站引河、前池、进水池和潜水泵进行流体域的整体三维建模,通过网格数量无关性和网格收敛性确定数值计算网格数量从而确保数值计算的有效性,在分析初设方案前池流场特征的基础上提出若干侧向进水前池的整流措施,并通过定量和定性相结合的方法对比分析各整流措施方案,最终优选合适的整流措施,本文所研究的技术路线如图1所示:图1技术路线图（二）数值计算方法基于对三维不可压缩流体的雷诺时均N-S方程和RNG k-ε湍流模型,RNG k-ε湍流模型计算式如式（1）所示,壁面函数采用可伸缩壁面函数处理近壁区流动,采用a.SYSCFX软件对翟山大沟泵站的引河、前池、进水池和潜水泵的流场进行整体数值求解。非结构化网格拥有着很强的自适应几何形体的优点,则引河、前池、进水池和潜水泵均使用非结构化网格剖分,针对流场分析的重点关注区域进行了局部网格加密处理。计算模型的进口边界条件设置为流量,出口边界条件设置为压力,固体壁面采用无滑移壁面处理,引河的平均粗糙度设置为2.5 mm,前池和进水池的壁面粗糙度设置为2 mm。引河、前池和进水池的表面为自由液面,忽略空气对水面产生的切应力和热交换采用对称平面条件,各相连过流建筑物的交界面均采用静静交界面。泵站前池数值计算各物理量的残差收敛精度设置为1×10-6。Ra.S可以如下进行:（1）k方程可以表示为:（2）ε方程可以定义为:（3）ε方程可以从Ra.S方程得到。涡流粘度为:μt=ρCμk2/ε（4）常数σκ,σε,C1,C2,＆Cμ是根据软件a.SYS-CFX中基于实验数据在5%

关键词：泵站前池流态数值模拟整流侧向进水

Utilizing Socia. Media.Da.a.a.a.ytics to Enha.ce Ba.king Services

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Intelligent Informa.ion Ma.a.ement 2022年第1期14卷 1-14页

作者： Moha.ed a.d El-Ha.id Fa.a. a.med a.ka. a.a. elsayed a.outa.l a.r Ga.a. Business Informa.ion Systems Faculty of Commerce and Business Administration Helwan University Cairo Egypt Fa.ulty of Computers a.d a.tificia. Intelligence Helwan University Cairo Egypt Fa.ulty of Commerce a.d Business a.ministra.ion Helwan University Cairo Egypt

The two most importa.t cha.lenges fa.ing ba.ks toda. a.e a.tra.ting new customers a.d reta.ning their existing ones. Resea.ch shows tha. 30 percent of ba.ks cited customer loya.ty a. their biggest cha.lenges. Thus, given tha. customer loya.ty is completely connected to customer delight. The cha.lenging question is: How do ba.ks a.hieve customer delight by ma.ing every intera.tion a.plea.a.t experience? In our viewpoint “The key is to stop trea.ing customers a. segments a.d persona.ize a.l customer intera.tions a.d services which ca. be a.hieved by using the la.est technologica. a.va.cements in Big Da.a.a.a.ytics, a.tificia. Intelligence (a.) a.d Ma.hine Lea.ning”. With the ra.idly increa.ing usa.e of socia. media.like Fa.ebook, Twitter, LinkedIn, a.d Insta.ra., business orga.iza.ions a.e now moving towa.ds a.a.ting this technology to drive business a.va.ta.es. This resea.ch will explore the power of socia. media.a.d how it ca. be used by ba.ks to provide a. edge over their competitors by providing improved products a.d services to their customers thereby ma.ing their experience ea.y a.d responsive. It a.so proposes a.fra.ework for socia. media.a.a.ytics a.d its importa.t components to a.dress a.l the technica. a.d business a.pects of the reta.l a.d online ba.king, however, wha. customer expects from this medium a.d wha. ba.ks offer to them needs to be widely studied a.d understood.

关键词： Na.ura. La.gua.e Processing (NLP) Sentiment a.a.ysis Socia. Ba.king Informa.ion Retrieva. (IR) Socia. Media.a.a.ytics

美国新生儿重症监护室床旁即时超声检查的临床方案解读

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中国当代儿科杂志 2023年第7期25卷 672-677页

作者：董文辉邓博引悦光 Ya.ser elsayed 巨容王建辉史源重庆医科大学附属儿童医院新生儿诊治中心/国家儿童健康与疾病临床医学研究中心/儿童发育疾病研究教育部重点实验室/儿科学重庆市重点实验室重庆400014 电子科技大学医学院附属妇女儿童医院/成都市妇女儿童中心医院四川成都611731 Depa.tment of Pedia.rics a.d Child Hea.th Max Rady College of MedicineUniversity of Manitoba-CanadaHealth Sciences Centre-WinnipegWinnipegManitobaCanada R0E0H0

2022年12月美国儿科学会发布了新生儿重症监护室(neona.a. intensive ca.e unit,NICU)床旁即时超声检查(point-of-ca.e ultra.onogra.hy,POCUS)的临床方案。该方案概述了NICU中POCUS的发展和现状,并对NICU顺利开展POCUS的核心要素和实施准则进行了总结。该文对该临床方案的要点进行了解读,并对国内POCUS的开展现状进行了分析,为国内新生儿科开展POCUS提供参考。

关键词：床旁即时超声检查临床方案解读新生儿

a.oxicillin–cla.ula.ic a.id induced sperm a.norma.ities a.d histopa.hologica. cha.ges in mice

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a.ia. Pa.ific Journa. of Tropica. Biomedicine 2017年第9期7卷 809-816页

作者： Ma.a.a. Fa.my a.ma. a. Fa.gha.y Ena.a. a. Oma.a.Zeina. M. Ha.sa. Fa.zia.a.E. a.y Souria.M. Donya.a.iza.a.E. Ibra.im elsayed M. Ba.oumy Depa.tment of Genetics a.d Cytology National Research CentreDokkiGizaEgypt Depa.tment of Pa.hology National Research CentreDokkiGizaEgypt Depa.tment of Chemistry of Na.ura. Compounds National Research CentreDokkiGizaEgypt Hydrobiology Depa.tment National Research CentreDokkiGizaEgypt Biology Depa.tment Girls Science CollegeUniversity of DammamSaudi Arabia

Objective: To explore the genotoxic potentia. a.d histopa.hologica. cha.ges induced in liver, kidney, testis, bra.n a.d hea.t a.ter using the a.tibiotic drug a.oxicillin/cla.ula.ic a.id(4:1).Methods: The study included chromosoma. a.erra.ion a.a.ysis in bone-ma.row a.d mouse sperma.ocytes, induction of sperm morphologica. a.norma.ities a.d histopa.hologica. cha.ges in different body orga.s. The drug wa. a.ministra.ed ora.ly a. a.dose of81 mg/kg body weight twice da.ly(Tota. = 162 mg/kg/da.) for va.ious periods of time equiva.ent to 625 mg/men(twice da.ly).Results: The results revea.ed non-significa.t chromosoma. a.erra.ions induced a.ter trea.ment with a.oxicillin/cla.ula.ic a.id(a.) in both bone ma.row a.d mouse sperma.ocytes a.ter 7 a.d 10 da.s trea.ment. On the other ha.d, sta.istica.ly significa.t percenta.es of sperm morphologica. a.norma.ities were recorded. Such percenta.e rea.hed 8.10 ± 0.55, 9.86 ± 0.63 a.d 12.12 ± 0.58 a. the three time interva.s tested(7, 14 a.d 35 da.s a.ter the 1 st trea.ment respectively)(trea.ment performed for 5 successive da.s) compa.ed with 2.78 ± 0.48 for the control. The results a.so revea.ed histopa.hologica. cha.ges in different body orga.s a.ter a. trea.ment which increa.ed with the prolonga.ion of the period of thera.y. Congestion of centra. va.n, liver hemorrha.e a.d hydropic cha.ges in hepa.ocytes were noticed in the liver. Degenera.ive cha.ges were found in kidney glomerulus a.d tubules while testis showed a.rophy of seminiferous tubules, a.d reduction of sperma.ogenesis. a. a.so induced neurotoxicity a.d a.tered bra.n neurotra.smitter levels. Hemorrha.e in the myoca.dium, disruption of ca.dia. muscle fibers a.d pyknotic nuclei in ca.diomyocytes were recorded a. side effects of a. in hea.t ***: The results concluded tha. a. trea.ment induced sperm morphologica. a.norma.ities a.d histopa.hologica. cha.ges in different body orga.s. Clinicia.s must be a.a.e of such results while describing the drug.

关键词： a.oxicillin/cla.ula.ic a.id Genotoxicity Sperm a.norma.ities Histopa.hologica. cha.ges

The influence of Thomson effect a.d inclined loa.s in a. electro-ma.neto-thermoela.tic solid with voids under green-Na.hdi theories

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Journa. of Ocea. Engineering a.d Science 2018年第3期3卷 253-264页

作者： elsayed M.a.d-Ela.iz Moha.ed I.M.Hila. Depa.tment of Ma.hema.ics Zagazig UniversityFaculty of ScienceP.O.Box 44519ZagazigEgypt

The present investiga.ion dea.s with the 2-dimensiona. deforma.ion in a.homogeneous thermoela.tic solid with voids subjected to inclined *** hea. conduction equa.ion is a.fected with the Thomson *** ba.ic governing equa.ions a.e modified by using Green-Na.hdi theory of *** norma. mode a.a.ysis technique is used to obta.n the components of stress,stra.n,tempera.ure,induced ma.netic field a.d cha.ge in volume fra.tion *** va.ia.ions of these qua.tities ha.e been depicted gra.hica.ly in the Green-Na.hdi theories of type-II a.d III for a. insula.ed *** numerica. ca.cula.ions,the effect of Thomson pa.a.eter a.d a.gle of inclina.ion on a.homogeneous,isotropic,electro-ma.neto-thermoela.tic ma.eria. with voids is revea.ed a.d discussed.

关键词： Electro-ma.neto-thermoela.ticity Norma. mode method Inclined loa.s Voids Thomson effect Green-Na.hdi theory

Enha.cing the explosive cha.a.teristics of a.Semtex explosive by involving a.mixtures of BCHMX a.d HMX

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Defence Technology（防务技术） 2020年第2期16卷 487-492页

作者： a.med Elbeih a.med K.Hussein Ta.er Elshena.y Sva.opluk Zema. Sa.a.M.Ha.ma. a.ma. Ba.a.a.Moha.ed a.elsayed Moha.ed Goba.a.Hesha. Ta.ta.y Milita.y Technica. College Kobry ElkobbahCairoEgypt Technica. Resea.ch Center CairoEgypt Institute of Energetic Ma.eria.s Faculty of Chemical TechnologyUniversity of PardubiceCzech Republic Fa.ulty of Pha.ma.y University of CairoGizaEgypt

a.well-known terna.y pla.tic explosive,Czech Semtex 1H,conta.ns a.mixture of PETN a.d RDX softened by *** this work,BCHMX wa. used to repla.e PETN in Semtex 1H to form Sem-BC+*** a.dition,a.other mixture ba.ed on BCHMX a.d HMX a. energetic fillers bonded by the polymeric ma.rix of Semtex 1H(Sem-BC+HMX)wa. *** pa.ticle size distribution of ea.h individua. explosive wa. determined to obta.n the optimum mixing *** a.d impa.t sensitivities were *** velocity of detona.ion wa. reported pra.tica.ly a.d the detona.ion properties were ca.cula.ed by EXPLO5 *** explosive strength of ea.h sa.ple wa. mea.ured by the ba.listic morta. *** conclusion confirms tha. the velocity of detona.ion of Sem-BC+HMX wa. the highest in compa.ison with the prepa.ed ***-BC+RDX ha. the lea.t impa.t a.d frictions ***-BC+RDX ha. higher detona.ion velocity,detona.ion properties a.d explosive strength tha. Semtex *** of BCHMX in Semtex 1H a. a.repla.ement for PETN is the ca.dida.e to produce a.high performa.ce a.va.ced Czech pla.tic explosive.

关键词： Semtex Explosives Combustion Sensitivity Detona.ion Explosive strength

Florid a.tonomic Fea.ures a.socia.ed with Medulla.y La.una. Stroke

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Interna.iona. Journa. of Clinica. Medicine 2022年第12期13卷 679-690页

作者： Mua. elsayed a.ra. Ha.a.een a.ma.Sha.s Pourna.y Sa.a.hcha.dra. Fera. a.ra.i Ta.seer Za.n Sa.ia.Noor Depa.tment of Neurology Al Qassemi Hospital (EHS) Emirates Health Services Sharjah UAE Fa.ulty of Medicine a.d Hea.th Sciences Omdurman Islamic University Omdurman Sudan

Introduction: a.tonomic nuclei a.fection results in va.ia.ions in hemodyna.ics, tempera.ure, swea.ing a.d ECG. Medulla.y strokes a.e cha.lenging in their presenta.ion, biza.re clinica. signs, work a.d neurologica. outcome. The commonest ca.se is infa.ction of the posterior inferior cerebella. a.tery (PICa.. a.a.omica. a.ea. a.fected include the inferior cerebella. peduncle, dorsola.era. medulla. nuclei of the Trigemina., vestibula. nuclei, Ninth a.d Va.us nerves. The descending sympa.hetic tra.ts a.d spin tha.a.ic tra.ts. Serious ca.diopulmona.y events ca. complica.e 11% of ca.es. Ca.e Presenta.ion: a.middle-a.ed fema.e developed sub-a.ute dizziness a.socia.ed with vomiting a.d right hea. pa.ns. She wa. una.le to wa.k but rema.ned cognitively clea.. Her ga.trointestina. symptoms were disa.ling a.d this wa. the ma.n fa.tor for presenting to the emergency room. The risk fa.tors included hypertension a.d dia.etes mellitus. Ima.ing studies were essentia. for posterior circula.ion stroke dia.nosis a.d follow-up. She ma.ifested rema.ka.le a.tonomic fea.ures rega.ding the skin a.d hemodyna.ics. Nevertheless, the hospita. course wa. controlla.le. Discussion: This ca.e report wa. consistent with releva.t litera.ure in the contra.la.era. va.o motor cha.ges a.d drop in body tempera.ure during the a.ute pha.e. Moreover, our pa.ient developed clinica. a.d ra.iologica. extension through double a.tipla.elets. Superiority of the ma.netic resona.ce ima.ing (MRI) sca.s in this pa.ient ena.led better dia.nostic a.cura.y in a.bra.nstem stroke. Conclusion: The a.tonomic fea.ures, in this ca.e, represent ma.or symptoma.ology a.d clinica. signs. The va.ia.ion in the hemodyna.ics a.d persistence of symptoms is thought provoking. This increa.es the a.a.eness of emergency doctors for a.ute stroke presenting with a.tonomic fea.ures will ena.le ea.ly detection a.d helps outcome.

关键词： a.tonomic Medulla.y Infa.ction Wa.lenberg’s Syndrome Bra.nstem Stroke