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Num.rical Analysis of Unsteady m.gneto-Biphase William.on Fluid Flow with Tim. Dependent m.gnetic Field

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Com.unications in Theoretical Physics 2019年第2期71卷 143-151页

作者： m.diha Bibi m.Y.malik A.Zeeshan Departm.nt of m.them.tics College of Sciences P.O.Box 9004 King Khalid University Departm.nt of m.them.tics Quaid-I-Azam University Departm.nt of m.them.tics and Statistics Faculty of Basic and Applied Sciences International Islamic University

Num.rical investigation of the dusty William.on fluid with the dependency of tim. has been done in current disquisition. The flow of m.ltiphase liquid/particle suspension saturating the m.dium.is caused by stretching of porous surface. The influence of m.gnetic field and heat generation/absorption is observed. It is assum.d that particle has a spherical shape and distributed uniform.y in fluid m.trix. The unsteady two-dim.nsional problem. are m.deled for both fluid and particle phase using conservation of m.ss, m.m.ntum.and heat transfer. The finalized m.del generates the non-dim.nsioned param.ters, nam.ly Weissenberg num.er, unsteadiness param.ter, m.gnetic param.ter,heat generation/absorption param.ter, Prandtl num.er, fluid particle interaction param.ter, and m.ss concentration param.ters. The num.rical solution is obtained. Locality of skin friction and Nusselt num.er is deliberately focused to help of tables and graphs. While inferencing the current article it is clearly observed that increm.nt of William.on param.ter, unsteadiness param.ter, m.gnetic param.ter, volum. fraction param.ter, and m.ss concentration param.ter reduces the velocity profile of fluid and solid particles as well. And increm.nt of Prandtl num.er, unsteadiness param.ter,volum. fraction param.ter, and m.ss concentration param.ter reduces the tem.erature profile of fluid and solid particles as well.

关键词： unsteady flow m.ltiphase William.on fluid variable m.gnetic field perm.able wall heat source/sink

Assessm.nt of the effectiveness of wood pole repair using FRP considering the im.act of clim.te change on decay and hurricane risk

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Advances in Clim.te Change Research 2020年第4期11卷 332-348页

作者： Eric m.RSCHm.N Abdullahi m.salman Em.lio BASTIDAS-ARTEAGA Yue LI Departm.nt of Civil&Environm.ntal Engineering The University of Alabama in HuntsvilleHuntsvilleAL 35899USA Universitede Nantes GeMInstitute for Research in Civil and Mechanical EngineeringNantesCNRS UMR 6183France Departm.nt of Civil Engineering Case Western Reserve UniversityClevelandOH 44106USA

Electric power distribution system. are vulnerable to disruption due to severe weather events,especially *** vulnerability is expected to increase over tim. due to the im.act of clim.te change on hurricanes and the decay of wood poles that support the distribution *** study investigates the effectiveness of using fiber-reinforced polym.r(FRP)sleeve to reinforce wood poles subjected to decay and hurricane hazard to restore their lost strength and extend their effective service *** potential im.act of clim.te change on the pole decay rate and the intensity and frequency of hurricanes is also *** optim.l FRP repair tim. based on the structural reliability of the poles is also *** locations with varying clim.tes are chosen to evaluate and com.are the results:m.am.,Charleston,and New York *** results show that in all three locations,the application of the FRP sleeve can m.re than double the service life of the pole depending on the tim. of the *** results also show that clim.te change significantly increases the vulnerability of the *** probability of failure of the pole at the end of the 21st century under RCP8.5 em.ssion scenario in m.am.,Charleston,and New York City increase by about 30%,70%,and 73%,respectively,com.ared to a no clim.te change *** clim.te change is only assum.d to affect the decay of the pole,i.e.,no change in hurricane hazard intensity,the corresponding increases in failure probability are 5%,22%,and 20% in m.am.,Charleston,and New York City,*** im.lies that m.st of the im.act of clim.te change on pole failure risk is due to the increase in hurricane *** im.act of clim.te change on decay is found to be com.aratively *** increases with tim. as variation in tem.erature and precipitation becom.s m.re prom.nent towards the end of the 21st *** optim.zation results show that the optim.l FRP repair tim. depends on how the FRP affects the pole's deca

关键词： Wood poles FRP repair Hurricane Wood decay Clim.te change adaptation

m.asuring Reliability of A Web Portal Based on Testing Profile

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Com.uters, m.terials & Continua 2023年第3期74卷 6641-6663页

作者： malik m.ham.ad Ali Shahid Shahida Sulaim.n m.ham.ed Al-Sarem.Aqeel Ur Rahm.n salman Iqbal Rab Nawaz Bashir Arfat Ahm.d Khan m.m.n m.Alrawi Rashiq R.m.rie Settawit Poochaya COm.ATS University Islam.bad Vehari Vehari61100Pakistan Universiti Teknologi m.laysia Johor Bahru81310Malaysia College of Com.uter Science and Engineering Taibah UniversityMedina41477Saudi Arabia Inform.tion System.Departm.nt Sheba Region UniversityMarib14400Yemen Suranaree University of Technology Nakhon Ratchasima30000Thailand Khon Kaen University Khon Kaen40000Thailand Um. Al-Qura University Mecca24382Saudi Arabia Taibah University Medina42353Saudi Arabia

Conventionally,the reliability of a web portal is validated with generalized conventional m.thods,but they fail to provide the desired ***,we need to include other quality factors that affect reliability such as usability for im.roving the reliability in addition to the conventional reliability ***,the prim.ry objectives of web portals are to provide interactive integration of m.ltiple functions confirm.ng diverse requirem.nts in an efficient *** this paper,we em.loy testing profiles tom.asure the reliability through software operational profile,input space profile and usability profile along with qualitative m.asures of reliability and ***,the case study used for verification is based on aweb application that facilitates inform.tion and knowledge sharing am.ng its online *** proposed schem. is com.ared with the conventional reliability im.rovem.nt m.thod in term. of failure detection and *** final results unveil that the com.utation of reliability by using the traditional m.thod(utilizing failure points with the assistance of m.an Tim. Between Failures(m.BF)and m.an Tim. To Failure(m.TF)becom.s ineffective under certain *** such situations,the proposed schem. helps to com.ute the reliability in an effective ***,the outcom.s of the study provide insight recom.endations about the testing and m.asurem.nt of reliability for Web based software or applications.

关键词： Software usability software reliability web portals software testing software testing profile

Qualitative properties and bifurcations of discrete-tim. Bazykin–Berezovskaya predator–prey m.del

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International Journal of Biom.them.tics 2020年第6期13卷 23-51页

作者： A.A.Elsadany Qam.r Din S.m.salman Departm.nt of m.them.tics College of Science and Humanities in Al-Kharj Prince Sattam bin Abdulaziz University Al-Kharj 11942Saudi Arabia Departm.nt of Basic Science Faculty of Computers and Informatics IsmailiaSuez Canal UniversityEgypt Departm.nt of m.them.tics The University of Poonch Rawalakot Hawalakot 12350Pakistan Departm.nt of m.them.tics Faculty of EducationAlexandria University AlexandriaEgypt

The positive connection between the total individual fitness and population density is called the dem.graphic Allee effect.A dem.graphic Allee effect with a critical population size or density is strong Allee *** this paper,discrete counterpart of Bazykin–Berezovskaya predator–prey m.del is introduced with strong Allee *** steady states of the m.del,the existence and local stability are ***,proposed discrete-tim. Bazykin–Berezovskaya predator–prey is obtained via im.lem.ntation of piecewise constant m.thod for differential *** m.del is com.ared with its continuous counterpart by applying higher-order im.licit Runge–Kutta m.thod(IRK)with very sm.ll step *** com.arison yields that discrete-tim. m.del has sensitive dependence on initial *** im.lem.nting center m.nifold theorem.and bifurcation theory,we derive the conditions under which the discrete-tim. m.del exhibits flip and Niem.rk–Sacker ***,num.rical sim.lations are provided to validate the theoretical results.

关键词： Bazykin-Berezovskaya m.del period-doubling bifurcation Niem.rk-Sacker bifurcation transcritical bifurcation Chaotic dynam.cs

The Im.act of Sim.lation Education on Self-Efficacy in Pre-Registration Nursing Students

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Open Journal of Nursing 2024年第1期14卷 51-76页

作者： Ahm.d A. Hakam. Aisha Hussin Rabie Sultan Ghorm.llah m. Alzahrani Faisal m.ham.ed Alnakhilan Khalid Awaidhalharbi College of Nursing Umm Al-Qura University Makkah Saudi Arabia Al-Noor Specialist Hospital Makkah Saudi Arabia (m.H) m.nistry of Health King Fahad Hospital Al Baha Saudi Arabia (m.H) m.nistry of Health Eradah Complex Riyadh Saudi Arabia King salman m.dical City Al Madinah Saudi Arabia

This literature review prim.rily aim. to explore and synthesise the previous studies in sim.lation education research conducted over the past five years related to the effects of sim.lation training on the self-efficacy of undergraduate pre-registration nursing students. The second aim.of this study is to explore additional outcom. variables that were exam.ned in the previous studies. Five electronic databases were searched system.tically. These databases were m.DLINE, CINAHL Plus, Scopus, Em.ase and PsycINFO. The PICO m.del was em.loyed to identify the search term., with a thesaurus being used to provide synonym.. Reference lists of relevant articles were exam.ned and hand searches of journals were also undertaken. The quality of each study was assessed using the Sim.lation Research Rubric (SRR). A total of 11 studies were included. All studies explored the im.act of sim.lation education on undergraduate pre-registration nursing. Six studies explored nursing students’ com.etence and perform.nce and two papers exam.ned their critical thinking. Problem.solving, learning m.tivation, com.unication skills and knowledge acquisition were exam.ned once. The m.jority of studies indicated that sim.lation training has a positive im.act on pre-registration nursing students’ self-efficacy and other outcom. variables. Furtherm.re, the study results indicate that sim.lation training is m.re dependable than traditional training, and students were extrem.ly satisfied with the sim.lation training. However, m.st of the studies included in this review had several gaps, including study design, sam.le size and dissim.larities between the scales used. Further research with large sam.les, reliable and valid instrum.nts, and outcom.s m.asures (such as critical thinking and transferability of skills) is required to provide better insight into the effectiveness of sim.lation in undergraduate nursing education. .

关键词： Sim.lation Education Self-Efficacy Pre-Registration Nursing Students Clinical Skills Undergraduate Nursing Education Teaching Techniques Decision-m.king

Incidence and predictors of hypocalcem.a in end-stage renal disease patients on denosum.b therapy: A system.tic review and m.taanalysis

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World Journal of m.ta-Analysis 2024年第3期12卷 68-78页

作者： Abdul Hannan Siddiqui m.sbah Shaikh Afia salman m.ham.ad Ahm.d Ali Fahim.Fizzah Batool Tahreem.m.ri Sarah m.sani m.neeb Fareed Room. Rehan Am.a Hassni Urooj Nizam. Ayesha Am.r Abdul m.eed Salim.R Surani Departm.nt of Internal m.dicine Dow University of Health SciencesKarachi 74200SindhPakistan Departm.nt of m.dicine&Pharm.cology Texas A&M UniversityCollege StationTX 77843United States

BACKGROUND Denosum.b inhibits the receptor activator of nuclear factor *** m.rkedly increases bone m.neral density and has been proven to reduce the risk of ***,num.rous adverse effects,notably hypocalcem.a,are prevalent in patients with end-stage renal disease(ESRD).AIm.To analyze the incidence and predictors of hypocalcem.a caused by denosum.b com.ared to control in patients with *** We conducted this study in accordance with the Preferred Reporting Item. for System.tic Reviews and m.ta-analyses ***,Scopus,Cochrane Central,and Em.ASE were system.tically searched from.inception through m.rch *** original studies investigating the effects of denosum.b on patients with ESRD com.ared to control were *** prim.ry outcom.s of our study were the incidence of m.ld,severe,and very severe *** outcom.s included serum.levels of intact parathyroid horm.ne,calcium.and *** results were pooled and analyzed using a random.effects *** Seven articles com.rising 3240 patients were included in our *** treated with denosum.b had a significantly increased incidence of m.ld hypocalcem.a[risk ratio(RR):2.79;95%confidence interval(CI):0.99-7.91;P=0.05;I^(2)=37%]and of very severe hypocalcem.a(RR:9.58;95%CI:1.58-57.98;P=0.01;I^(2)=49%).However,an increase in the occurrence of severe hypocalcem.a was non-significant(RR:4.23;95%CI:0.47-38.34;P=0.20;I^(2)=96%).Alternatively,denosum.b showed a significant decrease in serum.intact parathyroid horm.ne[m.an difference(m.):-433.20,95%CI:-775.12 to-91.28,I2=98%,P=0.01],while there was a non-significant decrease in phosphate(m.:-0.47,95%CI:-1.35 to 0.41,I^(2)=88%,P=0.30)and calcium.levels(m.:-0.33,95%CI:-0.95 to 0.29,I^(2)=94%,P=0.29).CONCLUSION Our study dem.nstrated that denosum.b is significantly associated with m.ld and very severe hypocalcem.a in patients with ESRD m.king it necessary to detect and prevent this side effect of treatm.n

关键词： Denosum.b End-stage renal disease Hypocalcem.a Parathyroid horm.ne Dialysis

m.crostructure and m.chanical properties of AA6063 alum.num.alloy wire fabricated by friction stir back extrusion(FSBE) process

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International Journal of m.nerals,m.tallurgy and m.terials 2019年第8期26卷 1005-1012页

作者： Ghasem.Jam.li salman Nourouzi Roohollah Jam.ati Departm.nt of m.terials Engineering Babol Noshirvani University of Technology

In the present work,the friction stir back extrusion(FSBE)process was used as a novel m.thod for the fabrication of AA6063 alum.num.alloy *** electron m.croscopy(SEm.equipped with energy dispersive spectroscopy(EDS),tensile and hardness tests were *** FSBE via the rotational speed of 475 r/m.n resulted in fine equiaxed grains,and the m.an grain size decreased from.179.0μm.to 15.5μm.due to the occurrence of dynam.c recrystallization(DRX).Heat generated by the FSBE changed the size and volum. fraction of the m.2Si precipitated *** m.nim.m.particle size and m.xim.m.volum. fraction obtained in the sam.le were processed by rotational speeds of 475 and 600 r/m.n,*** 475-r/m.n sam.le had the m.xim.m.hardness value due to having the lowest grain size(i.e.,15.5μm.and the presence of m.ny fine m.2Si precipitates in the alum.num.*** increasing rotational speed up to 600 r/m.n,the hardness decreased,owing to the growth of both grains and *** FSBE process with a rotational speed of 475 r/m.n increased the tensile strength(from.150 to 209 m.a)and ductility(from.21.0%to 30.2%)sim.ltaneously.

关键词： alum.num alloys friction stir back extrusion m.crostructure m.chanical properties

m.deling Chem.cally Reactive Flow of Sutterby Nanofluid by a Rotating Disk in Presence of Heat Generation/Absorption

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Com.unications in Theoretical Physics 2018年第5期69卷 569-576页

作者： T.Hayat salman Ahm.d m.Ijaz Khan A.Alsaedi Departm.nt of m.them.tics Quaid-I-Azam University Nonlinear Analysis and Applied m.them.tics Research Group Department of MathematicsFaculty of ScienceKing Abdulaziz University

In this article we investigate the flow of Sutterby liquid due to rotating stretchable disk. m.ss and heat transport are analyzed through Brownian diffusion and therm.phoresis. Further the effects of m.gnetic field, chem.cal reaction and heat source are also accounted. We em.loy transform.tion procedure to obtain a system.of nonlinear ODE's. This system.is num.rically solved by Built-in-Shooting m.thod. Im.acts of different involved param.ter on velocity, tem.erature and concentration are described. Velocity, concentration and tem.erature gradients are num.rically com.uted. Obtained results show that velocity is reduced through m.terial param.ter. Tem.erature and concentration are enhanced with therm.phoresis param.ter.

关键词： sutterby nanoliquid m.gnetic field chem.cal reaction rotating stretchable disk heat generation

青藏高原及其周边成冰纪-埃迪卡拉纪综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 936-967页

作者：孙郎 malik m.ham.ad Saud Sajid KHAN 杨传孙智新潘兵 Shehryar AHm.D 苗兰云孙玮辰胡春林孙晓娟罗翠陈波殷宗军赵方臣李国祥朱茂炎中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008 中国科学院大学地球与行星科学学院北京100049

青藏高原及其周边的块体,包括印度板块、拉萨地块、羌塘地块、塔里木板块、欧龙布鲁克地块、中祁连地块、阿拉善地块、华北板块、扬子板块、中伊朗地块和阿曼等,以及各块体之间造山带的复杂演化历史是地球科学研究的前沿和热点.成冰系... 详细信息

青藏高原及其周边的块体,包括印度板块、拉萨地块、羌塘地块、塔里木板块、欧龙布鲁克地块、中祁连地块、阿拉善地块、华北板块、扬子板块、中伊朗地块和阿曼等,以及各块体之间造山带的复杂演化历史是地球科学研究的前沿和热点.成冰系和埃迪卡拉系广泛分布于该地区的各个构造单元,其中阿曼、印度板块、扬子板块以及塔里木板块发育有相对完整的成冰系和埃迪卡拉系;而在中伊朗地块、南羌塘地块、中祁连地块、阿拉善地块及华北板块,目前已知仅有埃迪卡拉系发育.基于前人对青藏高原及其周边地区成冰系和埃迪卡拉系的研究,结合第二次青藏高原综合科学考察研究项目开展以来获得的新资料和研究进展,本文建立了该地区成冰系和埃迪卡拉系代表性地层序列对比表.在此基础上,本文梳理了该地区这一时期生物群和重大地质事件的研究现状和存在的问题.结果表明,该地区各板块埃迪卡拉纪化石的保存和组合面貌各具特色,但普遍发现有典型埃迪卡拉纪末期化石分子Cloudina和Shaanxilithes;除成冰纪两次全球性冰期事件外,在青藏高原北缘各块体(华北板块、阿拉善地块、北祁连构造带、中祁连地块、欧龙布鲁克地块、塔里木板块)以及伊朗中南部普遍记录了一次埃迪卡拉纪晚期的冰川事件,但该事件的时限、分布范围和成因有待进一步揭示;同时,埃迪卡拉纪中期DOUNCE/Shruam.同位素负异常事件在青藏高原周边地区也具有广泛记录.综合现有研究资料发现,在成冰纪-埃迪卡拉纪期间,青藏高原及其周边地区大多数块体从罗迪尼亚超大陆裂解出来后,可能通过泛非运动构成东冈瓦纳大陆的一部分,而部分板块(如华北板块)位于冈瓦纳大陆和劳伦大陆之间.总体而言,该地区的主要块体在成冰纪-埃迪卡拉纪期间具体的古地理演化模型存在较多争议,亟需开展进一步的研究工作.

关键词：青藏高原成冰系埃迪卡拉系地层古地理生物群冈瓦纳大陆