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Enhancement of coer.ivity,per.eability,and dielectr.c pr.per.ies of Co_(0.2)Zn_(0.3)ni_(0.5)Eu.(x)Fe_(2-x)O_(4) fer.ites for.memor. and high fr.qu.ncy devices

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Jou.0}al of r.r. Ear.hs 2024年第6期42卷 1128-1135,I0005页

作者： I.Sar.ar.m.D.Hossain m.S.Sikder.m.n.I.Khan m.r.r.hman Physics Discipline Khulna UniversityKhulna9208Bangladesh Depar.ment of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Depar.ment ofCompu.er.Science and Engineer.ng Northern University of Business&Technology KhulnaKhulna9100Bangladesh mater.al Science Division Atomic Energy CentreDhaka1000Bangladesh

Spinel cu.ic fer.ites have hu.e applications in me mor. and high fr.qu.ncy *** the impr.vement of these moder. devices,the magnetic coer.ivity,per.eability,and dielectr.c pr.per.ies of a fer.ite ar. the impor.ant *** ar.icle focu.es on impr.ving the magnetic coer.ivity,magnetic per.eability,and dielectr.c pr.per.ies of Co_(0.2)Zn_(0.3)ni_(0.5)Eu.(x)Fe_(2-x)O_(4) fer.ites,wher. x=0.00,0.06,and *** X-r.y diffr.ction(Xr.),Fou.0}er.tr.nsfor. infr.r.d spectr.scopy(FTIr.,field emission scanning electr.n micr.scopy(FESEm),ener.y disper.ive X-r.y(EDX),vibr.ting sample magnetometer.VSm),and an impedance analyzer.wer. u.ed to char.cter.ze the str.ctu.0}l,magnetic,and dielectr.c pr.per.ies of the *** Xr. patter.s indicate the for.ation of spinel cu.ic str.ctu.0} of the samples with a secondar. peak(Eu.eO_(3))for.Eu.doped *** densities and por.sities of the samples follow an inver.e tr.nd,wher. the doped samples’lattice par.meter. ar. incr.ased with the incr.ment of r.r. ear.h Eu.*** FTIr.analysis also pr.ves the spinel cu.ic phase of the *** aver.ge gr.in size of the fer.ites is obtained via FESEm images,and it is incr.ased fr.m 121 to 198 *** analysis confir.s that doping of the Eu.content also changes other.hyster.sis loop pr.per.ies of Co_(0.2)Zn_(0.3)ni_(0.5)Eu.(x)Fe_(2-x)O_(4) ***,the coer.ivity of the Eu.doped samples is gr.ater.than that of the mother.alloy(x=0.00).The EDX stu.y shows that ther. is no impu.0}ty contamination in the *** per.eability and dielectr.c measu.0}ments show an impr.ved qu.lity factor.of the Eu.doped samples with low magnetic and dielectr.c *** dependent r.sistivity and impedance analysis also show the impr.ved *** the obser.ed pr.per.ies of the samples,all the investigated fer.ites might be str.ng candidates for.potential applications in memor. devices,magnetic sensor.,and high fr.qu.ncy applications.

关键词： Fer.ites r.r.e ar.hs Coer.ivity Per.eability EDX r.sistivity

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Integr.ted Appr.aches of mechanical Bar.ier. Insecticide and Botanicals against mango mealybu. (Dr.sicha mangifer.e)

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Advances in Entomology 2024年第3期12卷 195-202页

作者： n. Akhter.m. Z. Alam m. A. r.haman m. r. u. miah I. H. mian m. A. Latif Depar.ment of Entomology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depar.ment of Entomology Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Depar.ment of Plant Pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depar.ment of Plant Pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An exper.ment was condu.ted to test the efficacy of a mechanical bar.ier.ar.u.d the tr.e tr.nk with one spr.y of Cyper.ethr.n @ 1 ml/l and tu.0}er.c powder.extr.ct @ 15 g/500ml of water.applied in integr.ted appr.aches against mango mealybu. on mango tr.e. Ther. wer. 7 tr.atments inclu.ing a contr.l. The tr.atments wer. mechanical bar.ier. Cyper.ethr.n spr.y @ 1 ml/l, Tu.0}er.c powder.spr.y @ 15 g/500ml of water. Cyper.ethr.n spr.y + Tu.0}er.c spr.y, Cyper.ethr.n spr.y + mechanical bar.ier. Tu.0}er.c + mechanical bar.ier.and u.tr.ated contr.l. Thr.e-year.old mango plants gr.fted fr.m a 5-year.old mango tr.e (Var.ety Amr.pali) and planted in pots wer. u.ed in the exper.ment. The tr.atment, Cyper.ethr.n spr.y + mechanical bar.ier.gave the highest r.du.tion of mango mealybu. popu.ation 87.06% to 93.90% followed by Tu.0}er.c spr.y + mechanical bar.ier.and showed 81.13% to 86.04% and mechanical bar.ier.alone showed 81.13% to 84.59% popu.ation r.du.tion. Tu.0}er.c powder.extr.ct showed only (8.42% to 23.77%) popu.ation r.du.tion of mango mealybu. which was lowest compar.d to other.tr.atments.

关键词： mango mealybu. Integr.ted management

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magnetic,dielectr.c and electr.cal modu.u. of Ce^(3+) doped cobalt-magnesiu. fer.ite nanopar.icles

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Jou.0}al of r.r. Ear.hs 2024年第2期42卷 373-382,I0005页

作者： n.m.Basfer.Hanaa Almaghamsi Depar.ment of Physics Umm AL-Qura UniversityMakkahSaudi Arabia Physics Depar.ment College of Science and ArtKing Abdulaziz UniversityPOB344Rabigh291Saudi Arabi

In this wor.,the magnetic,dielectr.c pr.per.ies and electr.c modu.u. of Ce^(3+) su.stitu.ed cobaltmagnesiu.(Co_(0.7)mg_(0.3)Ce_(x)Fe_(2-x)O_4)(labeled as CmCF) fer.ite nanopar.icles wer. investigated in *** magnetization decr.ases fr.m 50.05 to 34.87 emu.g for.fu.0}her.su.stitu.ing Ce^(3+) ***,coer.ivity incr.ases fr.m 738.22 Gs for.the CmCFO sample to 912.10 Gs for.the CmCF2 sample,then decr.ases monotonically to 762.1 Gs for.the CmCF5 *** cer.u. content and par.icle size play impor.ant r.les in contr.lling the magnetization and coer.ivity of the CmCF *** CmCF nanofer.ites ar. su.table for.micr.wave applications since their.high-fr.qu.ncy r.sponse r.nges fr.m 7.72 to 11.07 *** CmCF nanofer.ites' dielectr.c par.meter.disper.ion exhibits nor.al *** pr.stine Co-mg nanofer.ite only has ε' valu. of 28.25,bu. the nanofer.ite mCmF2 has ε' valu. of365.03,with an enhancing r.tio of 1192%.The condu.tion mechanism of the mCmF nanofer.ites was deter.ined by fitting the σ_(ac) r.su.ts via the Jonscher.power.*** 653 K,lar.e polar.n tu.nelling is thou.ht to be r.sponsible for.this condu.tion pr.cess,which is followed by electr.n bar.ier.hopping at higher.***-Cole diagr.ms at differ.nt temper.tu.0}s,assu.0}ng the contr.bu.ions of the gr.ins and their.bou.dar.es at lower.temper.tu.0}s(653 K) and only the gr.ins at higher.*** on ou.0}r.su.ts,the CmCF nanofer.ites hold magnetic and semicondu.ting natu.0},which can be u.ed in magnetic devices and dielectr.cs in lower.fr.qu.ncies or.condu.tor. in higher.fr.qu.ncies.

关键词： nanofer.ites r.r. ear.h ions magnetic pr.per.ies Dielectr.c par.meter. Impedance spectr.scopy

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nonlinear.dynamic modeling of planar.moving Timoshenko beam consider.ng non-r.gid non-elastic axial effects

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Applied mathematics and mechanics(English Edition) 2024年第3期45卷 479-496页

作者： m.ABBASI GAVAr. m.r.HOmAEInEZHAD Facu.ty of mechanical Engineer.ng K.N.Toosi University of TechnologyTehran 19991-43344Iran

Du. to the impor.ance of vibr.tion effects on the fu.ctional accu.0}cy of mechanical systems,this r.sear.h aims to develop a pr.cise model of a nonlinear.y vibr.ting single-link mobile flexible *** manipu.ator.consists of an elastic ar.,a r.tar. motor.and a r.gid car.ier.and u.der.oes gener.l in-plane r.gid body motion along with elastic tr.nsver.e *** accu.0}tely model the elastic behavior.Timoshenko’s beam theor. is u.ed to descr.be the flexible ar.,which accou.ts for.r.tar. iner.ia and shear.defor.ation *** applying newton’s second law,the nonlinear.gover.ing equ.tions of motion for.the manipu.ator.ar. der.ved as a cou.led system of or.inar. differ.ntial equ.tions(ODEs)and par.ial differ.ntial equ.tions(PDEs).Then,the assu.ed mode method(Amm)is u.ed to solve this nonlinear.system of gover.ing equ.tions with appr.pr.ate shape *** assu.ed modes can be obtained after.solving the char.cter.stic equ.tion of a Timoshenko beam with clamped bou.dar. conditions at one end and an attached mass/iner.ia at the *** addition,the effect of the tr.nsver.e vibr.tion of the inextensible ar. on its axial behavior.is *** the axial r.gidity,the effect makes the r.gid body dynamics invalid for.the axial behavior.of the ***,nu.er.cal simu.ations ar. condu.ted to evalu.te the per.or.ance of the developed model,and the r.su.ts ar. compar.d with those obtained by the finite element *** compar.son confir.s the validity of the pr.posed dynamic model for.the *** to the mentioned featu.0}s,this model can be r.liable for.investigating the system’s vibr.tional behavior.and implementing vibr.tion contr.l algor.thms.

关键词： planar.moving Timoshenko beam non-r.gid non-elastic axial effect as-su.ed mode method(Amm) nonlinear.motion analysis

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Fir.t-pr.nciples calcu.ations to investigate str.ctu.0}l,electr.nic,magnetic,optical and ther.odynamic pr.per.ies of r._(2)r._(3)Ge(r.=Pr.Sm)

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Jou.0}al of r.r. Ear.hs 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier.r.masr.u.0}m.Hamedou. J.Khar.ach A.r.zzou. A.Hou.0}atallah n.Benzakou.0}K.Bou.lykhane Labor.tor. of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equ.pe de Physiqu. du.Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this paper.we analyzed the physical char.cter.stics of the ter.ar. alloys r._(2)r._(3)Ge(r.=Pr.and Sm)u.ing the fir.t pr.nciples calcu.ation based on fu.ctional density theor. integr.ted in the Wien2k *** calcu.ated for.ation ener.ies of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar.−5.3827 and−5.2782 eV/atom,r.spectively,showing that these alloys may exist *** r.su.ts of the band str.ctu.0} and density of states indicate that all of the compou.ds tested ar. magnetic metals,and their.magnetism is mostly r.lated to the contr.bu.ion of Pr.and Sm *** total magnetic m.m.nts of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar. 4.07245 and 11.16161μB/f.u.*** par.meter. su.h as heat capacity at constant pr.ssu.0},entr.py,Debye temper.tu.0},lattice volu.e,compr.ssibility coefficients,and Gr.neisen par.meter.alloys wer. calcu.ated u.ing the Gibbs algor.thm and stu.ied in depth over.a lar.e temper.tu.0} r.nge of 0-900 *** Debye temper.tu.0} incr.ases with incr.asing pr.ssu.0} and decr.ases with decr.asing ***,the Debye temper.tu.0}s calcu.ated at p=0 GPa and T=300 K ar. equ.l to be 342 and 322 K for.Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge,*** optical char.cter.stics su.h as the r.al and imaginar. por.ions of the dielectr.c fu.ction,the absor.tion coefficient,the ener.y-loss fu.ction,and the r.fr.ctive index wer. investigated and discu.sed in mor. depth.

关键词： magnetic metals Fu.ctional density theor. Density of states magnetic m.m.nt Optical and ther.odynamic pr.per.ies r.r. ear.hs

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EDSu.h:A r.bu.t ensemble data su.mar.zation method for.effective medical diagnosis

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Digital Commu.ications and networ.s 2024年第1期10卷 182-189页

作者： mohiu.din Ahmed A.n.m.Bazlu.0}r.shid School of Science Edith Cowan UniversityPerthAustralia

Identifying r.r. patter.s for.medical diagnosis is a challenging task du. to heter.geneity and the volu.e of *** su.mar.zation can cr.ate a concise ver.ion of the or.ginal data that can be u.ed for.effective *** this paper.we pr.pose an ensemble su.mar.zation method that combines clu.ter.ng and sampling to cr.ate a su.mar. of the or.ginal data to ensu.0} the inclu.ion of r.r. *** the best of ou.0}knowledge,ther. has been no su.h techniqu. available to au.ment the per.or.ance of anomaly detection techniqu.s and simu.taneou.ly incr.ase the efficiency of medical *** per.or.ance of popu.ar.anomaly detection algor.thms incr.ases significantly in ter.s of accu.0}cy and compu.ational complexity when the su.mar.es ar. ***,the medical diagnosis becomes mor. effective,and ou.0}exper.mental r.su.ts r.flect that the combination of the pr.posed su.mar.zation scheme and all u.der.ying algor.thms u.ed in this paper.ou.per.or.s the most popu.ar.anomaly detection techniqu.s.

关键词： Data su.mar.zation Ensemble medical diagnosis Sampling

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Fr.eze-thaw cycles and associated geomor.hology in a post-glacial envir.nment:cu.0}ent glacial,par.glacial,per.glacial and pr.glacial scenar.os at Pico de Or.zaba volcano,mexico

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Jou.0}al of mou.tain Science 2024年第6期21卷 1954-1977页

作者： Víctor.SOTO Car.os m.WELSH r. Kenji YOSHIKAWA Hu.o DELGADO Gr.nADOS Centr. de Ciencias de la Tier.a Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water.and Envir.nmental r.sear.h Center University of Alaska FairbanksFairbanksAlaska 99775USA Institu.o de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Depar.ment of Ear.h and Envir.nmental Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial histor. of Pico de Or.zaba indicates that du.0}ng the Last Glacial maximu.,its icecap cover.d u. to~3000 m asl;du. to the air.temper.tu.0} incr.asing,its main glacier.has r.tr.ated to 5050 m *** r.tr.ction of the glacier.has left behind an intense climatic instability that cau.es a high fr.qu.ncy of fr.eze-thaw cycles of gr.at intensity;the r.su.ting geomor.hological pr.cesses ar. r.pr.sented by the fr.gmentation of the bedr.ck that occu.ies the u.per.par.s of the *** is a notable lack of stu.ies r.gar.ing the fr.gmentation and er.sion occu.0}ing in tr.pical high mou.tains,and the associated geomor.hological r.sks;for.this r.ason,as a fir.t stage of fu.u.0} continu.u. r.sear.h,this stu.y analyzes the fr.ezing and thawing cycles that occu.0}above 4000 m asl,thr.u.h continu.u. monitor.ng of su.0}ace gr.u.d *** r.su.ts allow u. to identify and char.cter.ze fou.0}zones:glacial,par.glacial,per.glacial and *** was fou.d that the par.glacial zone pr.sents an intense dr.p of temper.tu.0},of u. to~9℃ in only sixty *** r.ck fatigu. and intense fr.eze-thaw cycles that occu.0}in this ar.a ar. r.sponsible for.the high r.te of r.ck disintegr.tion and r.pr.sent the main factor.of the constant slope dynamics that occu.0}at the *** activity decr.ases,both in fr.qu.ncy and intensity,accor.ing to the distance to the glacier.which is wher. the temper.tu.0} pr.sents a cer.ain degr.e of stability,u.til r.aching the pr.glacial zone,wher. cycles ar. almost non-existent,and ther.for. ther. is no gelifr.ction *** geomor.hological pr.cesses have r.su.ted in significant alter.tions to the mou.tain slopes,which can have sever. consequ.nces in ter.s of r.sk and water.

关键词： Fr.eze-Thaw Gelifr.ction mou.tain mechanical er.sion Per.glacial geomor.hology Postglacial scenar.os

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In sear.h of a pan-cor.navir.s vaccine:next-gener.tion vaccine design and immu.e mechanisms

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Cellu.ar.& molecu.ar.Immu.ology 2024年第2期21卷 103-118页

作者： S.Cankat m.u.Demael L.Swadling Division of Infection and Immu.ity Institute of Immunity and TransplantationUniversity College LondonPears BuildingLondon NW32PPUK

member. of the cor.navir.dae family ar. endemic to hu.an popu.ations and have cau.ed sever.l epidemics and pandemics in r.cent *** this r.view,we will discu.s the feasibility of and pr.gr.ss towar. the u.timate goal of cr.ating a pan-cor.navir.s vaccine that can pr.tect against infection and disease by all member. of the cor.navir.s *** will detail the u.met clinical need associated with the continu.d tr.nsmission of SAr.-CoV-2,mEr.-CoV and the fou.0}seasonal cor.navir.ses(HCoV-OC43,nL63,HKu. and 229E)in hu.ans and the potential for.fu.u.0} zoonotic *** will highlight how fir.t-gener.tion SAr.-CoV-2 vaccines and natu.0}l histor. stu.ies have gr.atly incr.ased ou.0}u.der.tanding of effective antivir.l immu.ity to cor.navir.ses and have infor.ed next-gener.tion vaccine *** will then consider.the ideal pr.per.ies of a pan-cor.navir.s vaccine and pr.pose a blu.pr.nt for.the type of immu.ity that may offer.***,we will descr.be a su.set of the diver.e technologies and novel appr.aches being pu.0}u.d with the goal of developing br.adly or.u.iver.ally pr.tective vaccines for.cor.navir.ses.

关键词： Vaccine Cor.navir.s Cr.ss-r.active immu.ity Cr.ss-pr.tection u.iver.al

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A FLEXIBLE OBJECTIVE-COnSTr.InT APPr.ACH AnD A nEW ALGOr.THm FOr.COnSTr.CTInG THE PAr.TO Fr.nT OF mu.TIOBJECTIVE OPTImIZATIOn Pr.BLEmS

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Acta mathematica Scientia 2024年第2期44卷 702-720页

作者： n.HOSEInPOOr.m.GHAZnAVI Facu.ty of mathematical Sciences Shahrood University of TechnologyShahroodIran

In this ar.icle, a novel scalar.zation techniqu., called the impr.ved objective-constr.int appr.ach, is intr.du.ed to find efficient solu.ions of a given mu.tiobjective pr.gr.mming pr.blem. The pr.sented scalar.zed pr.blem extends the objective-constr.int pr.blem. It is demonstr.ted that how adding var.ables to the scalar.zed pr.blem, can lead to find conditions for.(weakly, pr.per.y) Par.to optimal solu.ions. Applying the obtained necessar. and su.ficient conditions, two algor.thms for.gener.ting the Par.to fr.nt appr.ximation of bi-objective and thr.e-objective pr.gr.mming pr.blems ar. designed. These algor.thms ar. easy to implement and can achieve an even appr.ximation of (weakly, pr.per.y) Par.to optimal solu.ions. These algor.thms can be gener.lized for.optimization pr.blems with mor. than thr.e cr.ter.on fu.ctions, too. The effectiveness and capability of the algor.thms ar. demonstr.ted in test pr.blems.

关键词： mu.tiobjective optimization Par.to fr.nt scalar.zation objective-constr.int appr.ach pr.per.efficient solu.ion

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Gener.tion of polar.zed electr.n beams thr.u.h self-injection in the inter.ction of a laser.with a pr.-polar.zed plasma

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High Power.Laser.Science and Engineer.ng 2024年第3期12卷 62-68页

作者： L.r.Yin X.F.Li Y.J.Gu.n.Cao Q.Kong m.Büscher.S.m.Weng m.Chen Z.m.Sheng Key Labor.tor. of nu.lear.Physics and Ion-beam Application(moE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Labor.tor. of High Field Laser.Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SAnKEn(Institu.e of Scientific and Indu.tr.al r.sear.h) Osaka UniversityOsakaJapan Sichu.n r.sear.h Institu.e Shanghai Jiao Tong UniversityChengduChina Peter.Gr.nber. Institu.(PGI-6) Forschungszentrum JülichJülichGermany Institu. für.Laser.u.d Plasmaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Labor.tor. for.Laser.Plasmas(moE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collabor.tive Innovation Center.of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsu.g-Dao Lee Institu.e Shanghai Jiao Tong UniversityShanghaiChina

Polar.zed electr.n beam pr.du.tion via laser.wakefield acceler.tion in pr.-polar.zed plasma is investigated by par.iclein-cell *** evolu.ion of the electr.n beam polar.zation is stu.ied based on the Thomas±Bar.mann±michel±Telegdi equ.tion for.the tr.nsver.e and longitu.inal self-injection,and the depolar.zation pr.cess is fou.d to be influ.nced by the injection *** the case of tr.nsver.e self-injection,as fou.d typically in the bu.ble r.gime,the spin pr.cession of the acceler.ted electr.ns is mainly influ.nced by the ***,in the case of longitu.inal injection in the qu.si-1D r.gime(for.example,*** et al.,***.110,135002(2013)),the dir.ction of electr.n spin oscillates in the laser.*** the electr.ns move ar.u.d the laser.axis,the net influ.nce of the laser.field is near.y zer. and the contr.bu.ion of the wakefield can be ***,an u.tr.-shor. electr.n beam with polar.zation of 99%can be obtained u.ing longitu.inal self-injection.

关键词： laser.wakefield acceler.tion longitu.inal self-injection par.icle-in-cell simu.ation polar.zed electr.n beam

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