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Facile synthesis of sam.rium.and cerium.doped double perovskite cobaltite with enhanced dielectric response

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Applied Therm.l Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of sm.Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCsCCO)are *** the specim.ns were synthesized by a facile synthesis technique nam.d the co-precipitation route.X-ray diffraction(XRD)reveals that BCsCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice param.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRD *** structural properties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and experim.ntal values discrepancy is less than 1%.A scanning electron m.croscope was used for perform.ng a m.crostructural *** sEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric perm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.eratures(100-500℃).All synthesized sam.les were exam.ned using non-linear Debye's function to determ.ne their spreading factor and relaxation *** specim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.les with the use of Jonscher's power *** power law indicates that the BCsCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 com.ositions follow non-overlapping polaron *** studied specim.n Bi_(2)Ca_(1.9)0sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displays a high electrical conductivity(∼46.1 s/cm..These findings correspond to those published for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 s/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCsCCO) spreading factor Conduction m.chanism Rare earths

In-situ construction of grass-like hybrid architecture responsible for extraordinary corrosion perform.nce: Experim.ntal and theoretical approach

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Nano m.terials science 2024年第1期6卷 44-59页

作者： T.suhartono F.Hazm.tulhaq y.sheng A.Chaouiki m.P.Kam.l y.G.Ko m.terials Electrochem.stry Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan38541Republic of Korea Research Center for Advanced m.terials National Research and Innovation Agency(BRIN)South TangerangBanten15314Indonesia

Despite the engineering potential by the co-existence of inorganic and organic substances to protect vulnerable m.tallic m.terials from.corrosive environm.nts,both their interaction and in-situ form.tion m.chanism.to induce the nature-inspired com.osite rem.ined less *** present work used three distinctive m.rcaptobenzazole(m.)com.ounds working as corrosion inhibitors,such as 2-m.rcaptobenzoxazole(m.O),2-m.rcaptobenzothiazole(m.T),and 2-m.rcaptobenzim.dazole(m.I)in a bid to understand how the geom.trical structure arising from.O,s,and N atom. affected the interaction toward inorganic *** com.ounds that were used here to control the corrosion kinetics would be interacted readily with the pre-existing m.O layer fabricated by plasm. *** phenom.non triggered the nucleation of the root network since m. com.ounds were seen to be adsorbed actively on the defective surface through the active sites in m. ***,the m.lecule with twin donor atom. adjacent to the m.rcapto-sites affected the facile growth of the grass-like structures with‘uniform.distribution via m.lecular self-assem.ly,which showed better corrosion perform.nce than those with having dissim.lar donor atom. with the inhibition efficiency(η)of 97%*** form.tion m.chanism.underlying nucleation and growth behavior of m. m.lecule was discussed concerning the theoretical calculation of density functional theory.

关键词： Nature-inspired com.osite Organic-inorganic interaction Corrosion inhibitor Density functional theory Electrochem.stry

Param.tric investigation on the novel and cost-effective nano fly ash im.regnated geopolym.r system.for sustainable construction

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Frontiers of structural and Civil Engineering 2024年第2期18卷 170-183页

作者： R.m.HANA s.m.Leela BHARATHI Departm.nt of Civil Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazardous environm.ntal effects of greenhouse gas em.ssions and clim.te change dem.nd alternative sources for cem.ntitious m.terials in the construction *** developm.nt of geopolym.r structures provides a way of producing 100%cem.nt-free *** this research work,a novel and sim.le way of deriving nano particles from.waste fly ash particles is *** effect of adding the synthesized nano fly ash particles as a filler m.dium.in geopolym.r m.rtars was investigated by considering strength and durability *** optim.zation was done by using regression analysis on the geopolym.r m.rtar and the im.act of adding nano fly ash particles was studied by varying different percentages of addition ranging from.0 to 7.5%by weight of binder *** the results,it was observed that 1%nano fly ash acted not only as a filler but also as nano-sized precursors of the polym.rization process,resulting in denser geopolym.r *** can explain the extraordinary gain in strength of 72.11 m.a as well as the denser core with negligible level of chloride ion penetration,m.king the m.terial suitable for the developm.nt of structures susceptible to m.rine environm.nt.

关键词： geopolym.r nano fly ash chloride ion penetration durability polym.rization fillers

QCD sum.rule study of J^(P)=1^(±)exotic states with two heavy quarks in the m.lecular picture

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Chinese Physics C 2024年第6期48卷 31-37页

作者： T.m.Aliev s.Bilm.s m.savcı Departm.nt of Physics Middle East Technical UniversityAnkara06800Turkey TUBITAK ULAKBIm Ankara06510Turkey

In this study,the spectroscopic param.ters of exotic m.lecular states com.osed of m.sons containing two heavy quarks(scalar-axial and pseudoscalar-axial m.son com.inations)are investigated within the QCD sum.*** findings reveal that m.lecular states containing charm.quarks do not form.bound states,whereas states with b-quarks can form.exotic m.lecular *** observation has significant im.lications for understanding the structure of these exotic states.

关键词： QCD sum.rules exotic m.sons m.lecular states

Analysis of strong decays of sU(3)partners ofΩ(2012)baryon

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Chinese Physics C 2024年第8期48卷 34-41页

作者： T.m.Aliev s.Bilm.s m.savci Departm.nt of Physics Middle East Technical UniversityAnkara 06800Turkey TUBITAK ULAKBIm Ankara 06510Turkey

We estim.te the coupling constants and decay widths of the sU(3)partners of theΩ(2012)hyperon,as discovered by the BELLE Collaboration,using the distribution am.litudes of the octet baryons within the light cone sum.rules *** study includes a com.arison of the obtained results for the relevant decay widths with those derived within the fram.work of the flavor sU(3)*** observe a good agreem.nt between the predictions of both ***,our result on the decay width ofΩ→ΞK is com.atible with the existing experim.ntal result within the uncertainties of the m.del *** results can provide helpful insights for determ.ning the nature of the sU(3)partners of theΩ(2012)baryon.

关键词： coupling constants light cone sum.rule hyperon

Background rem.val from.global auroral im.ges:Data-driven dayglow m.deling

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Earth and Planetary Physics 2024年第1期8卷 247-257页

作者： A.Ohm. m.m.delaire K.m.Laundal J.P.Reistad s.m.Hatch s.Gasparini s.J.Walker Birkeland Centre for space science Department of Physics and TechnologyUniversity of BergenBergenNorway

Global im.ges of auroras obtained by cam.ras on spacecraft are a key tool for studying the near-Earth ***,the cam.ras are sensitive not only to auroral em.ssions produced by precipitating particles,but also to dayglow em.ssions produced by photoelectrons induced by *** em.ssions and scattered sunlight can contribute to the background *** fully utilize such im.ges in space science,background contam.nation m.st be rem.ved to isolate the auroral *** we outline a data-driven approach to m.deling the background intensity in m.ltiple im.ges by form.lating linear inverse problem. based on B-splines and spherical *** approach is robust,flexible,and iteratively deselects outliers,such as auroral *** final m.del is sm.oth across the term.nator and accounts for slow tem.oral variations and large-scale asym.etries in the *** dem.nstrate the m.del by using the three far ultraviolet cam.ras on the Im.ger for m.gnetopause-to-Aurora Global Exploration(Im.GE)*** m.thod can be applied to historical m.ssions and is relevant for upcom.ng m.ssions,such as the solar wind m.gnetosphere Ionosphere Link Explorer(sm.LE)m.ssion.

关键词： aurora dayglow m.deling global auroral im.ges far ultraviolet im.ges dayglow rem.val

Leveraging User-Generated Com.ents and Fused BiLsTm.m.dels to Detect and Predict Issues with m.bile Apps

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Com.uters, m.terials & Continua 2024年第4期79卷 735-759页

作者： Wael m.s.yafooz Abdullah Alsaeedi Departm.nt of Com.uter science College of Computer Science and EngineeringTaibah UniversityMedina42353Saudi Arabia

In the last decade, technical advancem.nts and faster Internet speeds have also led to an increasing num.er ofm.bile devices and users. Thus, all contributors to society, whether young or old m.m.ers, can use these m.bileapps. The use of these apps eases our daily lives, and all custom.rs who need any type of service can accessit easily, com.ortably, and efficiently through m.bile apps. Particularly, saudi Arabia greatly depends on digitalservices to assist people and visitors. such m.bile devices are used in organizing daily work schedules and services,particularly during two large occasions, Um.ah and Hajj. However, pilgrim. encounter m.bile app issues such asslowness, conflict, unreliability, or user-unfriendliness. Pilgrim. com.ent on these issues on m.bile app platform.through reviews of their experiences with these digital services. scholars have m.de several attem.ts to solve suchm.bile issues by reporting bugs or non-functional requirem.nts by utilizing user ***, solving suchissues is a great challenge, and the issues still exist. Therefore, this study aim. to propose a hybrid deep learningm.del to classify and predict m.bile app software issues encountered by m.llions of pilgrim. during the Hajj andUm.ah periods from.the user perspective. Firstly, a dataset was constructed using user-generated com.ents from.elevant m.bile apps using natural language processing m.thods, including inform.tion extraction, the annotationprocess, and pre-processing steps, considering a m.lti-class classification problem. Then, several experim.ntswere conducted using com.on m.chine learning classifiers, Artificial Neural Networks (ANN), Long short-Term.em.ry (LsTm., and Convolutional Neural Network Long short-Term.m.m.ry (CNN-LsTm. architectures, toexam.ne the perform.nce of the proposed m.del. Results show 96% in F1-score and accuracy, and the proposedm.del outperform.d the m.ntioned m.dels.

关键词： m.bile apps issues play store user com.ents deep learning LsTm bidirectional LsTm

sTCF conceptual design report (Volum. 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： m.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogom.agkov A.Bondar I.Boyko Z.H.Bu F.m.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen s.L.Chen s.m.Chen s.Chen s.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng J.Cheng s.Cheng T.G.Cheng J.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.m.Dias D.Z.Ding L.y.Dong W.H.Dong V.Druzhinin D.s.Du y.J.Du Z.G.Du L.m.Duan D.Epifanov y.L.Fan s.s.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng y.T.Feng J.L.Fu J.Gao y.N.Gao P.s.Ge C.Q.Geng L.s.Geng A.Gilm.n L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han m.Han X.Q.Hao J.B.He s.Q.He X.G.He y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou y.R.Hou C.y.Hu H.m.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu y.C.Hu J.Hua G.s.Huang J.s.Huang m.Huang Q.y.Huang W.Q.Huang X.T.Huang X.J.Huang y.B.Huang y.s.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia s.Jia Z.K.Jia H.B.Jiang J.Jiang s.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing X.L.Kang X.s.Kang B.C.Ke m.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzm.n y.Lei E.Levichev C.H.Li C.Li D.y.Li F.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.m.Li J.Li L.Li L.Li L.y.Li N.Li P.R.Li R.H.Li s.Li T.Li W.J.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li Z.J.Li H.Liang J.H.Liang y.T.Liang G.R.Liao L.Z.Liao y.Liao C.X.Lin D.X.Lin X.s.Lin B.J.Liu C.W.Liu D.Liu F.Liu G.m.Liu H.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.y.Liu K.Liu L.Liu Q.Liu s.B.Liu T.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü y.Lu y.Lu Z.Lu P.Lukin F.J.Luo T.Luo X.F.Luo y.H.Luo H.J.Lyu X.R.Lyu J.P.m. P.m. y.m. y.m.m. F.m.as s.m.lde D.m.tvienko Z.X.m.ng R.m.tchell A.Nefediev y.Nefedov s.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passem.r y.P.Pei H.P.Peng L.Peng X.y.Peng X.J.Peng K.Peters s.Pivovarov E.Pyata B.B.Qi y.Q.Qi W.B.Qian y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.s.Qin T.L.Qiu J.Radem.cker C.F.Redm.r H.y.sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAs Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Norm.l University Wuhan 430079China Central south University Changsha 410083China China University of Geosciences Wuhan 430074China China University of m.ning and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Norm.l University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced study UCASHangzhou 310024China Hebei Norm.l University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helm.oltz Institute m.inz Staudinger Weg 18D-55099 MainzGermany Henan Norm.l University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher school of Econom. 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Autom.tive Technology Shiyan 442002China Hunan Norm.l University Changsha 410081China Hunan University of science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner m.ngolia University Hohhot 010021China Institute of Advanced science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of m.dern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm.facility(sTCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-m.ss energy range from.2 to 7 GeV with a peak lum.nosity of 0.5×10^(35) cm.(–2)·s^(–1) or *** sTCF will produce a data sam.le about a factor of 100 larger than that of the presentτ-charm.factory—the BEPCII,providing a unique platform.for exploring the asym.etry of m.tter-antim.tter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the standard *** sTCF project in China is under developm.nt with an extensive R&D *** docum.nt presents the physics opportunities at the sTCF,describes conceptual designs of the sTCF detector system.and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm.region high lum.nosity sTCF detector conceptual design

Com.lexed am.no acid m.nerals ***-glycinate chelated m.nerals:Im.act on the perform.nce of old laying hens

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Anim.l Nutrition 2024年第1期16卷 395-408页

作者： m.rcos J.B.santos m.ria C.m.m.Ludke Leandro m.silva Carlos B.V.Rabello m.rcia R.Barros Fabiano s.Costa Clariana s.santos Jam.lle s.s.Wanderley Departm.nt of Anim.l science Rural Federal University of PernambucoRecifePEBrazil Departm.nt of Veterinary science Rural Federal University of PernambucoRecifePEBrazil

The present study was to evaluate the effect of trace m.nerals(Zn,m.,and Cu)from.com.lexed am.no acid m.nerals(Zm.AA)and bis-glycinate chelated m.nerals(Zm.Gly)in laying hen diets on perform.nce,internal and external egg quality,yolk m.neral deposition,intestinal m.rphom.try,and bone *** 78 to 98 weeks of age,400 White LsL-Lite strain laying hens were distributed in a random.zed design with 4 treatm.nts with 10 replicates per *** were distributed in a 2×2 factorial arrangem.nt using either Zn,m.,and Cu of Zm.AA or Zm.Gly source at 2 levels:low(20,20,and 3.5 m./kg of Zn,m.,and Cu,respectively)or high(40,40,and 7 m./kg of Zn,m.,and Cu,respectively).The analysis of variance was perform.d,and in cases where differences were observed,the m.ans were com.ared using Tukey?s test(Psource and level of trace m.neral supplem.ntation had a significant im.act on the perform.nce of laying *** fed Zm.AA had higher egg production(P=0.01),egg weight(P=0.02),egg m.ss(P=0.01),and lower feed conversion ratio(P=0.05)com.ared to those fed *** Zm.AA supplem.ntation showed higher album.n height(P=0.01),album.n weight(P=0.01),and eggshell thickness(Psition of Zn(Pm.(Pyolk was greater for hens received *** weight(P=0.04)and bone densitom.try(Pm.AA *** the sm.ll intestine,Zm.AA resulted in longer villi(P=0.02)and shorter crypt depth(P=0.01)in the *** and ileum.m.asurem.nts were influenced by the level and source of trace m.nerals(Pying hens fed Zm.AA exhibited superior perform.nce,egg quality,deposition of trace m.nerals in the egg yolk,and bone density com.ared to hens fed *** this study,older laying hens supplem.nted with Zm.AA at lower levels dem.nstrated adequate levels of supplem.ntation.

关键词： Bis-glycinates m.tal-am.no acids Radiodensity Trace m.nerals