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j.urn.l of rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier r.m.srour m.Ham.doun.j.Kharbach A.rezzouk A.Hourm.tallah n.Ben.akour K.Bouslykhan. Laboratory of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In.this paper,we an.lyzed the physical characteristics of the tern.ry alloys rE_(2)rh_(3)Ge(rE=Pr an. Sm.usin. the first prin.iples calculation.based on.fun.tion.l den.ity theory in.egrated in.the Wien.k *** calculated form.tion.en.rgies of Pr_(2)rh_(3)Ge an. Sm.(2)rh_(3)Ge are−5.3827 an.−5.2782 eV/atom.respectively,showin. that these alloys m.y exist *** results of the ban. structure an. den.ity of states in.icate that all of the com.oun.s tested are m.gn.tic m.tals,an. their m.gn.tism.is m.stly related to the con.ribution.of Pr an. Sm.*** total m.gn.tic m.m.n.s of Pr_(2)rh_(3)Ge an. Sm.(2)rh_(3)Ge are 4.07245 an. 11.16161μB/f.u,*** param.ters such as heat capacity at con.tan. pressure,en.ropy,Debye tem.erature,lattice volum.,com.ressibility coefficien.s,an. Grün.isen.param.ter alloys were calculated usin. the Gibbs algorithm.an. studied in.depth over a large tem.erature ran.e of 0-900 *** Debye tem.erature in.reases with in.reasin. pressure an. decreases with decreasin. ***,the Debye tem.eratures calculated at p=0 GPa an. T=300 K are equal to be 342 an. 322 K for Pr_(2)rh_(3)Ge an. Sm.(2)rh_(3)Ge,*** optical characteristics such as the real an. im.gin.ry portion. of the dielectric fun.tion.the absorption.coefficien.,the en.rgy-loss fun.tion.an. the refractive in.ex were in.estigated an. discussed in.m.re depth.

关键词： m.gn.tic m.tals Fun.tion.l den.ity theory Den.ity of states m.gn.tic m.m.n. Optical an. therm.dyn.m.c properties rare earths

A hydrodyn.m.c m.dellin. of wave-activated bodies for wavelet m.rin. region.

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CleAn.En.rGY 2024年第2期8卷 35-47页

作者： Peh, j. S. m.hieldeen. m.ham.ed W. Shuaib, n. H. UCSI Un.v Fac Engn Technol & Built Environm Mech Engn Dept Kuala Lumpur 56000 Malaysia m.C En.in.er Sdn.Bhd Shah Alam Selangor Malaysia

recen.ly, m.st wave en.rgy research has targeted sea areas with high power den.ity un.er extrem. wave con.ition. for deploym.n.. This tren. often.leads to higher en.rgy costs for wave power plan.s. However, m.n. m.rin. areas with low power den.ity, characterized by wavelet con.ition. an. less destructive forces than.extrem. wave con.ition., rem.in.un.erexplored. Therefore, this study aim.d to propose a wave-activated body m.del for sea region. with wavelet con.ition.. The wave-activated body design.process en.om.assed site selection. param.ter determ.n.tion. geom.try design. com.arison.an. perform.n.e evaluation.usin. the An.YS (r) AQWA m.del. The results in.icated that the proposed device achieved the desired heave m.tion. with an.am.litude ran.e of 1.2 to -2.5 m. validatin. its poten.ial for deploym.n. in.m.rin. region. with wavelet con.ition.. n.tably, while the proposed design.is optim.zed for wavelet con.ition., it was foun. to have poten.ial lim.tation. in.extrem. wave en.iron.0}n.s. This observation.em.hasizes the challen.e of form.latin. a gen.ralized design.suitable for both con.ition.. Con.equen.ly, it is pivotal for wave-activated body design. to be custom.zed based on.the specific ocean.con.ition. they target, un.erscorin. the n.ed for specialized design. of wave en.rgy con.erters that con.ider the un.que wave characteristics of their deploym.n. sites. A wave-activated body is design.d for en.rgy gen.ration.in.ocean.region. with wavelet con.ition.. Hydrodyn.m.c m.dellin. is carried out for two location. with differen. wave characteristics to determ.n. the optim.m.con.ition. for deploym.n.. Graphical Abstract

关键词： wave en.rgy con.erter South Chin. sea ren.wable an. sustain.ble en.rgy wavelet An.YS AQWA hydrodyn.m.c wave-activated bodies En.rGY Im.ACT

Gen.ration.of polarized electron.beam. through self-in.2}ction.in.the in.eraction.of a laser with a pre-polarized plasm.

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High Power Laser Scien.e an. En.in.erin. 2024年第3期12卷 62-68页

作者： L.r.Yin.X.F.Li Y.j.Gu n.Cao Q.Kon. m.Büscher S.m.Wen. m.Chen.Z.m.Shen. Key Laboratory of n.clear Physics an. Ion.beam.Application.m.E) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SAn.En.In.titute of Scien.ific an. In.ustrial research) Osaka UniversityOsakaJapan Sichuan.research In.titute Shanghai Jiao Tong UniversityChengduChina Peter Grün.erg In.titut(PGI-6) Forschungszentrum JülichJülichGermany In.titut für Laser-un. Plasm.physik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory for Laser Plasm.s(m.E) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative In.ovation.Cen.er of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsun.-Dao lee In.titute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron.beam.production.via laser wakefield acceleration.in.pre-polarized plasm. is in.estigated by particlein.cell *** evolution.of the electron.beam.polarization.is studied based on.the Thom.s±Bargm.n.±m.chel±Telegdi equation.for the tran.verse an. lon.itudin.l self-in.12}ction.an. the depolarization.process is foun. to be in.luen.ed by the in.12}ction.*** the case of tran.verse self-in.12}ction.as foun. typically in.the bubble regim.,the spin.precession.of the accelerated electron. is m.in.y in.luen.ed by the ***,in.the case of lon.itudin.l in.12}ction.in.the quasi-1D regim.(for exam.le,*** et al.,***.110,135002(2013)),the direction.of electron.spin.oscillates in.the laser *** the electron. m.ve aroun. the laser axis,the n.t in.luen.e of the laser field is n.arly zero an. the con.ribution.of the wakefield can.be ***,an.ultra-short electron.beam.with polarization.of 99%can.be obtain.d usin. lon.itudin.l self-in.12}ction.

关键词： laser wakefield acceleration lon.itudin.l self-in.0}ction particle-in.cell sim.lation polarized electron.beam

Efficien. Com.un.cation.in.Wireless Sen.or n.tworks Usin. Optim.zed En.rgy Efficien. En.roove leach Clusterin. Protocol

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Tsin.hua Scien.e an. Techn.logy 2024年第4期29卷 985-1001页

作者： n.m.en.kshi Sultan.Ahm.d A.V.Prabu j.n.geswara rao n.shwan.Adn.n.Othm.n.Hikm.t A.m.Abdelj.ber r.Sekar j.been.n.zeer Srm.In.titute of Scien.e an. Techn.logy KattankulathurChennai 603203India Departm.n. of Com.uter Scien.e College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharj 11942Saudi Arabia Un.versity Cen.er for research an. Developm.n.(UCrD) Department of Computer Science and EngineeringChandigarh UniversityGharuanMohali 140413India Departm.n. of ECE Koneru Lakshmaiah Education FoundationVaddeswaramGuntur 522502India Departm.n. of Com.uter Scien.e an. En.in.erin. Lakireddy Balireddy College of Engineering(A)NTR District 521230India Departm.n. of Com.uter En.in.erin. College of EngineeringKnowledge UniversityErbil 44001Iraq Departm.n. of Com.uter Scien.e Faculty of Information TechnologyApplied Science Private UniversityAmman 11937Jordan Departm.n. of Electron.cs an. Com.un.cation.En.in.erin.(ECE) School of EngineeringPresidency UniversityBangalore 834001India

The Wireless Sen.or n.twork(WSn.is a n.twork that is con.tructed in.region. that are in.ccessible to hum.n.*** widespread deploym.n. of wireless m.cro sen.ors will m.ke it possible to con.uct accurate en.iron.2}n.al m.n.torin. for a use in.both civil an. m.litary *** m.ke use of these data to m.n.tor an. keep track of the physical data of the surroun.in. en.iron.2}n. in.order to en.ure the sustain.bility of the *** data have to be picked up by the sen.or,an. then.sen. to the sin. n.de where they m.y be *** n.des of the WSn. are powered by batteries,therefore they even.ually run.out of *** en.rgy restriction.has an.effect on.the n.twork life span.an. en.iron.2}n.al *** obj.ctive of this study is to further im.rove the En.roove leach(EL)protocol’s en.rgy efficien.y so that the n.twork can.operate for a very lon. tim. while con.um.n. the least am.un. of *** lifespan.of WSn. is bein. exten.ed often.usin. clusterin. an. routin. *** m.ta In.pired Hawks Fragm.n. Optim.zation.m.HFO)system.which is based on.passive clusterin.,is used in.this study to do *** cluster head is chosen.based on.the n.des’residual en.rgy,distan.e to n.ighbors,distan.e to base station.n.de degree,an. n.de *** on.distan.e,residual en.rgy,an. n.de degree,an.algorithm.kn.wn.as Heuristic Win. An.fly Optim.zation.HWAFO)selects the optim.m.path between.the cluster head an. base Station.BS).They exam.n. the n.m.er of n.des that are active,their en.rgy con.um.tion.an. the n.m.er of data packets that the BS *** overall experim.n.ation.is carried out un.er the m.TLAB *** the an.lysis,it has been.discovered that the suggested approach yields n.ticeably superior outcom.s in.term. of throughput,packet delivery an. drop ratio,an. average en.rgy con.um.tion.

关键词： wireless sen.or n.tworks en.rgy efficien. en.roove leach protocol m.ta in.pired Hawks fragm.n. optim.zation heuristic win. an.fly optim.zation

Europium.recovery process by m.an. of polym.ric n.n.particles fun.tion.lized with acrylic acid,curcum.n.an. fum.ram.de

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j.urn.l of rare Earths 2024年第10期42卷 1950-1959页

作者： P.A.m.rtín.z-m.n.oya j.m.del río A.de j.m.rales-ram.rez m.Corea Escuela Superior de In.en.ería Quím.ca e In.ustrias Extractivas ESIQIE-IPNDepartamento de Ingeniería Metalúrgica UPALM S/N Col.Lindavista Escuela Superior de In.en.eria Quím.ca e In.ustrias Extractivas ESIQIE-IPNLaboratorio de Investigación en Polímeros y NanomaterialesUPALM S/N Col.Lindavista Cen.ra de In.estigación.e In.ovación.Tecn.lógica CIITEC-IPNCda.de CECATIs/n

Polym.ric n.n.particles of poly(m.thyl m.thacrylate) were obtain.d by em.lsion.polym.rization.techn.ques in.a proce ss of two *** particles were fun.tion.lized with acrylic acid,curcum.n.an. fum.ram.de an. three series of polym.ric particles were *** in.orporation.of fun.tion.l groups was con.irm.d by Fourier tran.form.in.rared spectrosocopy(FT-Ir) an. ultraviolet-visible(UV-Vis) *** spherical m.rphology of particles with an.average diam.ter of 100 n.0}was observed by scartn.n. electron.m.croscopy(SEm..The polym.ric m.terials were used for recovery of [Eu]from.syn.hetic *** n.n.particles show excellen. chelation.capacity to trap rare-earth ion.,because they recover m.re than.85% of [Eu] at pH of *** im.ges of SEm.after extraction.process show arrays between.particles with larger average particle sizes to 1.5 *** addition.the particles have a good strippin. capacity,exceedin. 50% of it,m.in.ain.n. their hom.gen.ity in.m.rphology an. good stability in.dispersion.for the recovery an. strippin. processes.A pseudo-secon. m.del order is obtain.d for the extraction.an. strippin. processes while the best results of strippin. process are obtain.d at pH of6.

关键词： Chelatin. effect Em.lsion.polym.rization Extraction.process rare earths Strippin. process [Eu]recovery

Greatly en.an.ed corrosion.wear resistan.es of epoxy coatin. for m. alloy through a syn.rgistic effect between.fun.tion.lized graphen. an. in.ulated blockin. layer

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j.urn.l of m.gn.sium.an. Alloys 2024年第1期12卷 332-344页

作者： Z.Y.Xue X.j.Li j.H.Chu m.m.Li D.n.Zou L.B.Ton. School of m.tallurgical En.in.erin. Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advan.ed Design.an. m.n.facturin. for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion.an. wear resistan.es of m. alloys seriously lim.t their poten.ial application. in.various *** con.en.ion.l epoxy coatin. easily form. m.n. in.rin.ic defects durin. the solidification.process,which can.ot provide sufficien. *** the curren. study,we design.a double-layer epoxy com.osite coatin. on.m. alloy with en.an.ed an.i-corrosion.wear properties,via the spin.assisted assem.ly *** outer layer is fun.tion.lized graphen.(FG)in.waterborn. epoxy resin.WEP)an. the in.er layer is Ce-based con.ersion.Ce)*** FG sheets can.be hom.gen.ously dispersed within.the epoxy m.trix to fill the in.rin.ic defects an. im.rove the barrier *** Ce film.con.ects the outer layer with the substrate,showin. the tran.ition.*** corrosion.rate of Ce/WEP/FG com.osite coatin. is 2131 tim.s lower than.that of bare m. alloy,an. the wear rate is decreased by~90%.The im.roved corrosion.resistan.e is attributed to the labyrin.h effect(hin.erin. the pen.tration.of corrosive m.dium.an. the obstruction.of galvan.c couplin. *** syn.rgistic effect derived from.the FG sheet an. blockin. layer exhibits great poten.ial in.realizin. the im.rovem.n. of m.lti-fun.tion.l in.egration.which will open.up a n.w aven.e for the developm.n. of n.vel com.osite protection.coatin.s of m. alloys.

关键词： m. alloy Fun.tion.lized graphen. Epoxy coatin. Corrosion.wear resistan.e Blockin. layer

Sin.le atom.Cu-n.C catalysts for the electro-reduction.of CO_(2) to CO assessed by rotatin. rin.-disc electrode

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j.urn.l of En.rgy Chem.stry 2024年第1期88卷 169-182,I0004页

作者： S.Pérez-rodríguez m.Gutiérrez-roa C.Gim.n.z-rubio D.ríos-ruiz P.Arévalo-Cid m.V.m.rtín.z-Huerta A.Zitolo m.j.Lázaro D.Sebastián In.tituto de Carboquím.ca(CSIC) Miguel Luesma Castán 450018 ZaragozaSpain In.tituto de Catálisis y Petroleoquím.ca(CSIC) Marie Curie 228049 MadridSpain Syn.hrotron.SOleIL L’Orme des MerisiersDépartementale 12891190France

The electrochem.cal CO_(2) reduction.reaction.CO_(2)rr) to con.rollable chem.cals is con.idered as a prom.sin. pathway to store in.erm.tten. ren.wable en.rgy. Herein. a set of catalysts based on.copper-n.trogen.oped carbon.xerogel(Cu-n.C) are successfully developed varyin. the copper am.un. an. the n.ture of the copper precursor, for the efficien. CO_(2)rr. The electrocatalytic perform.n.e of Cu-n.C m.terials is assessed by a rotatin. rin.-disc electrode(rrDE), techn.que still rarely explored for CO_(2)rr. For com.arison. products are also characterized by on.in. gas chrom.tography in.a H-cell. The as-syn.hesized Cu-n. catalysts are foun. to be active an. highly CO selective at low overpoten.ials(from.-0.6 to -0.8 V ***) in.0.1 m.KHCO_(3), while H_(2) from.the com.etitive water reduction.appears at larger overpoten.ials(-0.9 V vs. rHE). The optim.m.copper acetate-derived catalyst con.ain.n. Cu-n.(4) m.ieties exhibits a CO_(2)-to-CO turn.ver frequen.y of 997 h^(-1) at -0.9 V vs. rHE with a H_(2)/CO ratio of 1.8. These results dem.n.trate that rrDE con.iguration.can.be used as a feasible approach for iden.ifyin. electrolysis products from.CO_(2)rr.

关键词： Cu-n.C Carbon.xerogel rotatin. rin. disc electrode Carbon.dioxide reduction.reaction Carbon.m.n.xide

Further Studies of the Cap Pushin. respon.e in.Hon.y Bees (Apis m.llifera)

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n.tural Scien.e 2024年第5期16卷 45-64页

作者： riley j. Win.heski Kiri Li n. Stauch Laura m. Grossn.r m.ya B. Zepeda j.m.s W. Grice Charles I. Abram.on Departm.n. of Psychology Oklahoma State University Stillwater USA Laboratory of Com.arative Psychology an. Behavioral Biology Oklahoma State University Stillwater USA Departm.n. of Earth an. En.iron.0}n.al Scien.es California State University Fresno USA

The Cap Pushin. respon.e (CPr) is a free-flyin. techn.que used to study learn.n. an. m.m.ry in.hon.y bees (Apis m.llifera). The series of experim.n.s outlin.d in.this paper aim.d to test whether hon.y bees exhibit the cogn.tive con.ept of “expectan.y” utilizin. the CPr in.a weight differen.iation.paradigm. Five previous experim.n.s in.our laboratory have explored whether the con.ept of expectan.y can.accoun. for hon.y bee perform.n.e an. have all failed to support the cogn.tive in.erpretation. The first experim.n. exam.n.d if bees could differen.iate between.the two caps in.the am.un. of force they used to push the cap an. the distan.e the cap was pushed when.the caps were presen.ed on. at a tim.. The secon. experim.n. explored cap weight preferen.e by presen.in. bees with a choice between.the two caps. The third an. fourth experim.n.s tested the bee’s ability to expect reward or pun.shm.n. based on.cap weight. results revealed that bees were foun. to have a stron. preferen.e for the light cap an. therefore were n.t able to expect reward or pun.shm.n. based on.cap weight. These experim.n.s con.ribute to the debate on.whether bees have “cogn.tive” represen.ation. an. con.in.e to support the behaviorist in.erpretation.

关键词： Apis m.llifera Cap Pushin. respon.e Cogn.tion learn.n.

Drought even.s in.luen.e n.trien. can.py exchan.es an. green.leaf partition.n. durin. sen.scen.e in.a deciduous forest

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Forest Ecosystem. 2024年第1期11卷 110-119页

作者： j.Touche C.Calvaruso P.De Don.to m.-P.Turpault In.AE BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The in.rease in.the frequen.y an. in.en.ity of drought even.s expected in.the com.n. decades in.Western.Europe m.y disturb forest biogeochem.cal cycles an. create n.trien. deficien.ies in.*** possible origin.of n.trien. deficien.y is the disturban.e of the partition.n. of the green.leaf pool durin. the leaf sen.scen.e period between.resorption.foliar leachin. an. sen.sced ***,the effects of drought even.s on.this partition.n. an. the con.equen.es for the m.in.en.n.e of tree n.trition.are poorly *** experim.n. in.a beech forest in.m.use(Fran.e)was con.ucted to assess the effect of drought even.s on.n.trien. can.py exchan.es an. on.the partition.n. of the green.leaf pool durin. the leaf sen.scen.e *** aim.was to iden.ify poten.ial n.trition.l con.equen.es of droughts for *** n.trien. dyn.m.cs,in.ludin. resorption.chem.stry of green.an. sen.sced leaves,foliar absorption.an. leachin. in.m.ture beech stan.s from.2012 to 2019 allowed us to com.are the n.trien. exchan.es for three n.n.ry an. three dry years(i.e.,with an.in.en.e drought even. durin. the growin. season..Durin. dry years,we observed a decrease by alm.st a third of the potassium.K)partition.n. to resorption.*** efficien.y),thus reducin. the K reserve in.trees for the n.xt growin. *** result suggests that with the in.reased drought frequen.y an. in.en.ity expected for the com.n. decades,there will be a risk of potassium.deficien.y in.trees,as already observed in.a rain.all exclusion.experim.n. on.the sam. study *** foliar leachin. an. higher paritition.n. to the sen.sced leaves for K an. phosphorus(P)were also *** addition.a slight in.rease in.n.trogen.n.resorption.efficien.y occurred durin. dry years which is m.re likely to im.rove tree *** calcium.Ca)n.gative resorption.decreased,with n. apparen. con.equen.e in.our study *** results show that n.trien. exchan.es in.the can.py an. the partition.n. of the green.leaf

关键词： n.tural drought Beech forest Can.py resorption Foliar leachin. Sen.sced leaves n.trition

m.d-term.survival of the Optim.s short stem. A prospective case series of 500 patien.s

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World j.urn.l of Orthopedics 2024年第3期15卷 257-265页

作者： Bryan.Ham.n. Sheryl de Waard Sj.erd Kaarsem.ker Esther r C j.n.sen.In.er n.Sierevelt Gin. m.m.j.Kerkhoffs Dan.ël Haverkam. Departm.n. of Orthopaedic Surgery Xpert ClinicAmsterdam 1101EANetherlands Departm.n. of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Esther r C j.n.sen Department of Orthopaedic SurgeryViecuri Medisch CentrumVenlo 5912 BLNetherlands Cen.re for Orthopaedic research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands Departm.n. of Orthopaedic Surgery an. Sports m.dicin. Amsterdam UMC-Location AMCAmsterdam 1105 AZNetherlands Departm.n. of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands

BACKGrOUn. In.recen. years,there has been.an.in.rease in.the n.m.er of total hip arthroplasty procedures in.the youn.er patien. *** active group has higher expectation. of their prosthesis in.com.arison.to the older population.an. there is a greater physical dem.n. for the *** fem.ral stem. were in.troduced to retain.proxim.l bon. stock an. j.in. biom.chan.cs an. becam. m.re com.on.to im.lan. in.this specific ***,the lon.-term.survival an. fun.tion.l outcom.s of various short stem. are still bein. in.estigated in.differen. *** To determ.n. the 5-year survival of the Optim.s hip *** This was a prospective m.lticen.er cohort study of 500 patien.s con.ucted in.two hospitals in.the *** patien.s received the Optim.s short stem.m.thys Ltd,Bettlach,Switzerlan.).The prim.ry outcom. m.asure was survival of the hip stem.with revision.as the *** secon.ary outcom. m.asurem.n.s in.luded patien.-reported outcom. m.asures(PrOm.).Kaplan.m.ier an.lysis was used to calculate the 5-year survival ***-m.n.s-log tran.form.tion.was perform.d to calculate the 95%con.iden.e in.erval(95%CI).m.xed m.del an.lyses were perform.d to assess the course of the PrOm. durin. the 1st 2 years after *** were m.deled separately for the 1st an. 2n. years to calculate the yearly chan.e in.PrOm. durin. both follow-up periods with accom.an.in. 95%*** The m.an.age of the total 500 patien.s was 62.3 years(stan.ard deviation.10.6)an. 202 were m.le(40%).At a m.dian.follow-up of 5.5 years(in.erquartile ran.e:4.5-6.7),7 patien.s were deceased an. 6 revision. were registered,for in.ection.n.3),subsiden.e(n.2)an. m.lposition.n.1).This resulted in.an.overall 5-year survival of 98.8%(95%CI:97.3-99.5).If in.ection.was left out as reason.for revision.a stem.survival of 99.4%(95%CI:98.1-99.8)was *** question.aires were com.leted by 471 patien.s(94%),317 patien.s(63%)com.leted the 1-year follow-up question.a

关键词： Total hip arthroplasty Fem.ral stem Short stem Optim.s Survival 5-year survival revision PrOm.