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Num.rical calculation of Z-scan m.asurem.nts for nonlinear m.dia with large phase shift

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Optoelectronics Letters 2024年第3期20卷 177-182页

作者： m.d.Zidan A.Allahham departm.nt of Physics Atomic Energy Commission of SyriaP.O.Box 6091DamascusSyria

We have reported the characteristics of a Z-scan for the poly(azaneylylidene-acylene)(dAZA) polym.r, as nonlinear m.dium.with a large nonlinear phase shift using continuous-wave(CW) laser beam. It has been verified that the Fresnel diffraction m.del is applicable for analyses of Z-scan m.asurem.nts with dAZA polym.r at high laser power. It was found that Z-scan curves with peak-to-valley features appear as the applied light intensity increases in the case of a large nonlinear phase shift. The Z-scan experim.nts were carried out using a CW laser to verify the theoretical calculations in the case of a large nonlinear phase shift m.del. Our results show good agreem.nts between the experim.ntal data and the proposed theoretical m.dels.

关键词： nonlinear phase m.dia

Enhancem.nt of coercivity,perm.ability,and dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites for m.m.ry and high frequency devices

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Journal of Rare Earths 2024年第6期42卷 1128-1135,I0005页

作者： I.Sardar m.d.Hossain m.S.Sikder m.N.I.Khan m.R.Rahman Physics discipline Khulna UniversityKhulna9208Bangladesh departm.nt of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh departm.nt ofCom.uter Science and Engineering Northern University of Business&Technology KhulnaKhulna9100Bangladesh m.terial Science division Atomic Energy CentreDhaka1000Bangladesh

Spinel cubic ferrites have huge applications in m. m.ry and high frequency *** the im.rovem.nt of these m.dern devices,the m.gnetic coercivity,perm.ability,and dielectric properties of a ferrite are the im.ortant *** article focuses on im.roving the m.gnetic coercivity,m.gnetic perm.ability,and dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites,where x=0.00,0.06,and *** X-ray diffraction(XRd),Fourier transform.infrared spectroscopy(FTIR),field em.ssion scanning electron m.croscopy(FESEm.,energy dispersive X-ray(EdX),vibrating sam.le m.gnetom.ter(VSm.,and an im.edance analyzer were used to characterize the structural,m.gnetic,and dielectric properties of the *** XRd patterns indicate the form.tion of spinel cubic structure of the sam.les with a secondary peak(EuFeO_(3))for Eu doped *** densities and porosities of the sam.les follow an inverse trend,where the doped sam.les’lattice param.ters are increased with the increm.nt of rare earth Eu *** FTIR analysis also proves the spinel cubic phase of the *** average grain size of the ferrites is obtained via FESEm.im.ges,and it is increased from.121 to 198 *** analysis confirm. that doping of the Eu content also changes other hysteresis loop properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ***,the coercivity of the Eu doped sam.les is greater than that of the m.ther alloy(x=0.00).The EdX study shows that there is no im.urity contam.nation in the *** perm.ability and dielectric m.asurem.nts show an im.roved quality factor of the Eu-doped sam.les with low m.gnetic and dielectric *** dependent resistivity and im.edance analysis also show the im.roved *** the observed properties of the sam.les,all the investigated ferrites m.ght be strong candidates for potential applications in m.m.ry devices,m.gnetic sensors,and high frequency applications.

关键词： Ferrites Raree arths Coercivity Perm.ability EdX Resistivity

Highly toxic Aβ begets m.re Aβ

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Neural Regeneration Research 2024年第9期19卷 1871-1872页

作者： m.rc m.Kem.h Noel d.Lazo Gustaf H.Carlson School of Chem.stry and Biochem.stry Clark UniversityWorcesterMAUSA

Alzheim.r’s disease(Ad)is the m.st com.on form.of dem.ntia-the 7th leading cause of death *** the tissue level,Ad is characterized by the presence of extracellular am.loid plaques that are com.rised prim.rily of the am.loid-βpeptide(Aβ),and by intraneuronal neurofibrillary tangles com.osed of *** genetics of early-onset Ad and longitudinal brain-im.ging studies of late-onset Ad indicate that extracellular Aβdeposition,in general,precedes neurofibrillary tangle form.tion in neurons(Ham.el et al.,2021;Young-Pearse et al.,2023).

关键词： Aβ tau Alzheim.r death

The m.lti-im.urity system.in CdSe nanoplatelets:electronic structure and therm.dynam.c properties

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Com.unications in Theoretical Physics 2024年第3期76卷 165-173页

作者： d A Baghdasaryan V A Harutynyan E m.Kazaryan H A Sarkisyan Russian-Arm.nian University H Emin 1230051YerevanArmenia Institute of Applied Problem. of Physics 25 Nersisyan St0014YerevanArmenia

This paper theoretically studies the im.urity states and the effects of im.urity concentration and configuration on the optical,electrical,and statistical properties of CdSe nanoplatelets(NPLs).An im.ge charge-based m.del of electron-im.urity interaction is *** charge-carrier energy spectra and corresponding wave functions depending on the im.urity num.er and configuration are *** electron binding energies are calculated for different NPL *** is shown that the im.ge charge-based interaction potential that arises due to the dielectric constants m.sm.tch is m.ch stronger than the interaction potential that does not take such a m.sm.tch into ***,it is dem.nstrated that the binding energies are increasing with the num.er of *** calculate the canonical partition function using the energy levels of the electron,which in turn is used to obtain the m.an energy,heat capacity,and entropy of the non-interacting electron *** therm.dynam.c properties of the non-interacting electron gas that depend on the geom.tric param.ters of the NPL,im.urity num.er,configuration,and tem.erature are studied.

关键词： nanoplateletes therm.dynam.c properties im.urity states

Predictor-corrector Fdm.analysis of m.d darcy-Forchheim.r flow of a m.cropolar fluid with viscous dissipation and heterogeneoushom.geneous

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Propulsion and Power Research 2024年第2期13卷 257-272页

作者： d.Thenm.zhi m.Eswara Rao departm.nt of m.them.tics Saveetha School of EngineeringSIMATSChennaiTamilnaduIndia

This research delves into an intricate exploration ofﬂuid dynam.cs within heat transfer system.,with a speciﬁc focus on enhancing our understanding and im.roving system.efﬁ*** a sophisticated m.them.tical m.del,the study incorporates m.cropolarﬂuid dynam.cs,m.cro rotational effects,lam.narﬂow characterized by the darcy-Forchheim.r m.del,inertia effects,and chem.cal reactions within a heat transfer system.featuring boundary layer *** m.them.tical fram.work consists of partial differential equations(PdEs),and the study utilizes advanced num.rical techniques,including the(PC4-Fdm.Predictor-Corrector Finite difference m.thod and the shooting m.thod,to solve these govern-ing *** inclusion of quantized m.sh points and analysis of convergence using 4th orderﬁnite difference m.thods enhances the precision of the obtained *** param.eters are scrutinized to draw m.aningful *** heterogeneous param.ter reveals an increasing trend inﬂuid concentration,while the hom.geneous param.ter indicates a collision effect leading to a decrease inﬂuid *** Eckert num.er,associated with viscous dissipation,exhibits a correlation with decreasedﬂuid tem.erature and increasedﬂuid *** rotation param.ters suggest a parallel increase inﬂuid velocity and a m.rginal decrease inﬂuid ***,the darcy-Forchheim.r param.ter,reﬂective of inertial effects,showcases an increase inﬂuid tem.erature and decrease in velocity in the convection *** the industrial im.lications,the study underscores the signiﬁcance of convection heat transfer system. in the context of ***ﬁndings offer valuable insights for optim.zing heating and cooling processes in diverse industrial applications,ranging from.power plants to waste heat recovery units and pharm.ceutical industries.ª2024 The *** services by Elsevier *** behalf of KeAi Com.unications ***.

关键词： Predictor-corrector m.cropolarﬂuid m.gnetohydrodynam.cs(m.d) Viscous dissipation Hom.geneous-heterogeneous

Single atom.Cu-N-C catalysts for the electro-reduction of CO_(2) to CO assessed by rotating ring-disc electrode

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Journal of Energy Chem.stry 2024年第1期88卷 169-182,I0004页

作者： S.Pérez-Rodríguez m.Gutiérrez-Roa C.Gim.nez-Rubio d.Ríos-Ruiz P.Arévalo-Cid m.V.m.rtínez-Huerta A.Zitolo m.J.Lázaro d.Sebastián Instituto de Carboquím.ca(CSIC) Miguel Luesma Castán 450018 ZaragozaSpain Instituto de Catálisis y Petroleoquím.ca(CSIC) Marie Curie 228049 MadridSpain Synchrotron SOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochem.cal CO_(2) reduction reaction(CO_(2)RR) to controllable chem.cals is considered as a prom.sing pathway to store interm.ttent renewable energy. Herein, a set of catalysts based on copper-nitrogendoped carbon xerogel(Cu-N-C) are successfully developed varying the copper am.unt and the nature of the copper precursor, for the efficient CO_(2)RR. The electrocatalytic perform.nce of Cu-N-C m.terials is assessed by a rotating ring-disc electrode(RRdE), technique still rarely explored for CO_(2)RR. For com.arison, products are also characterized by online gas chrom.tography in a H-cell. The as-synthesized Cu-NC catalysts are found to be active and highly CO selective at low overpotentials(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 overpotentials(-0.9 V vs. RHE). The optim.m.copper acetate-derived catalyst containing Cu-N_(4) m.ieties exhibits a CO_(2)-to-CO turnover frequency of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/CO ratio of 1.8. These results dem.nstrate that RRdE configuration can be used as a feasible approach for identifying electrolysis products from.CO_(2)RR.

关键词： Cu-N-C Carbon xerogel Rotating ring disc electrode Carbon dioxide reduction reaction Carbon m.noxide

Radioisotope production using lasers:From.basic science to applications

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m.tter and Radiation at Extrem.s 2024年第3期9卷 31-44页

作者： m.R.d.Rodrigues A.Bonasera m.Scisciò J.A.Pérez-Hernández m.Ehret F.Filippi P.L.Andreoli m.Huault H.Larreur d.Singappuli d.m.lloy d.Raffestin m.Alonzo G.G.Rapisarda d.Lattuada G.L.Guardo C.Verona Fe.Consoli G.Petringa A.m.Nam.e m.La Cognata S.Palm.rini T.Carriere m.Cipriani G.di Giorgio G.Cristofari R.de Angelis G.A.P.Cirrone d.m.rgarone L.Giuffrida d.Batani P.Nicolai K.Batani R.Lera L.Volpe d.Giulietti S.Agarwal m.Krupka S.Singh Fa.Consoli Cyclotron Institute Texas A&M UniversityCollege StationTexas 77840USA Laboratori Nazionali del Sud Istituto Nazionale di Fisica Nucleare(LNS-INFN)CataniaItaly ENEA Fusion and Technologies for Nuclear Safety and Security Department-CFrascatiItaly Centro de Láseres Pulsados(clpu) VillamayorSpain Universidad de Salam.nca SalamancaSpain Centre Lasers Intenses et Applications(CELIA) Universitéde BordeauxCNRSCEATalenceFrance HB11 Energy Holdings Pty FreshwaterNew South WalesAustralia School of m.them.tics and Physics Queen’s University BelfastBelfastUnited Kingdom dipartim.nto di Fisica e Astronom.a“E.m.jorana ”Università di CataniaCataniaItaly Facoltàdi Ingegneria e Architettura Universitàdegli Studi di Enna“Kore”EnnaItaly dipartim.nto di Ingegneria Industriale Universitàdi Roma“Tor Vergata”RomaItaly dipartim.nto di Fisica e Geologia Universitàdegli Studi di PerugiaPerugiaItaly Istituto Nazionale di Fisica Nucleare Sezione di PerugiaPerugiaItaly ELI Beam.ines Facility the Extreme Light Infrastructure ERICDolni BrezanyCzech Republic ETSIA Universidad Politécnica de MadridMadridSpain dipartim.nto Fisica “E.Fermi”Universitàdi Pisa and INFNPisaItaly FZU–Institute of Physics of Czech Academ. of Sciences PragueCzech Republic Institute of Plasm. Physics of Czech Academ. of Sciences PragueCzech Republic

The discovery of chirped pulse am.lification has led to great im.rovem.nts in laser technology,enabling energetic laser beam. to be com.ressed to pulse durations of tens of fem.oseconds and focused to a few *** with energies of tens of m.V can be accelerated using,for instance,target norm.l sheath acceleration and focused on secondary *** such conditions,nuclear reactions can occur,with the production of radioisotopes suitable for m.dical *** use of high-repetition lasers to produce such isotopes is com.etitive with conventional m.thods m.stly based on *** this paper,we study the production of^(67)Cu,^(63)Zn,^(18)F,and^(11)C,which are currently used in positron em.ssion tom.graphy and other *** the sam. tim.,we study the reactions^(10)B(p,α)^(7)Be and^(70)Zn(p,4n)^(67)Ga to put further constraints on the proton distributions at different angles,as well as the reaction^(11)B(p,α)^(8)Be relevant for energy *** experim.nt was perform.d at the 1 PW laser facility at VegaⅢin Salam.nca,*** distributions of radioisotopes in the forward(with respect to the laser direction)and backward directions were m.asured using a high purity germ.nium.*** results are in reasonable agreem.nt with num.rical estim.tes obtained following the approach of Kim.ra and Bonasera[*** ***.,Sect.A 637,164–170(2011)].

关键词： purity estim.tes backward

Charting the course to solid-state dual-ion batteries

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Carbon Energy 2024年第3期6卷 132-177页

作者： Habtom.d.Asfaw Antonia Kotronia Nuria Garcia-Araez Kristina Edström.daniel Brandell departm.nt of Chem.stry Ångström LaboratoryUppsala UniversityUppsalaSweden departm.nt of Chem.stry University of SouthamptonSouthamptonUK

An electrolyte destined for use in a dual-ion battery(dIB)m.st be stable at the inherently high potential required for anion intercalation in the graphite electrode,while also protecting the Al current collector from.anodic dissolution.A higher salt concentration is needed in the electrolyte,in com.arison to typical battery electrolytes,to m.xim.ze energy density,while ensuring acceptable ionic conductivity and operational *** recent years,studies have dem.nstrated that highly concentrated organic electrolytes,ionic liquids,gel polym.r electrolytes(GPEs),ionogels,and water-in-salt electrolytes can potentially be used in *** can help reduce the use of solvents and thus lead to a substantial change in the Coulom.ic efficiency,energy density,and long-term.cycle life of ***,GPEs are suited to m.nufacture com.act dIB designs without separators by virtue of their m.chanical strength and electrical *** this review,we highlight the latest advances in the application of different electrolytes in dIBs,with particular em.hasis on GPEs.

关键词： anion intercalation concentrated electrolytes dual-ion battery graphite ionic liquids polym.r electrolyte

Acceptability of Kangaroo m.ther Care (Km.) by m.thers with Low-Birth-Weight Babies at Arthur davison Children’s Hospital, in Ndola, Zam.ia

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Open Journal of Obstetrics and Gynecology 2024年第5期14卷 790-823页

作者： Julia d. Kalito m.ureen m. m.sum. Chapim. Fabian departm.nt of m.dwifery Women&#8217s and Child Health University of Zambia Lusaka Zambia

Background: Kangaroo m.ther Care is a sim.le safe m.thod used to care for low-birth-weight babies. Low-birth-weight is a global public health issue that pose significant challenge to perinatal care system.. Globally, com.lications due to low-birth-weight are the leading cause of neonatal m.rtality, resulting in an estim.ted 1 m.llion deaths annually. Kangaroo m.ther Care (Km.) is a low-cost m.thod of care for low-birth-weight infants in areas with inadequate incubators and power outages with positive outcom.s. Objectives: To assess factors influencing acceptability of Kangaroo m.ther Care (Km.) in NICU at Arthur davison Children’s Hospital in Ndola, Zam.ia. m.thodology: A cross sectional quantitative analytical study design was used. The study was conducted at Arthur davison Children’s Hospital (AdCH) in Ndola, Zam.ia. The purposive sam.ling m.thod was used to select the study participants and a total of 129 m.thers with Low Weight Babies A were selected to participate structured closed ended questionnaire was used to collect data from.the participants using an interview. data was analyzed using a Statistical Package for Social Scientists (SPSS) software version 26. Cross tabulations were done to determ.ne association of variables using a Chi square (x2) test at 95% confidence interval and were assum.tions where not m.t, fishers exact test was used. m.ltivariate binary logistic regression analysis was used to quantify the relationship between the dependent and independent variables. Results: m.st of the respondents had m.le babies 77%, 69% of the babies weighed 1000 g - 1400 g, m.jority 79% had norm.l delivery, 71% of the respondents were m.ltigravida and m.st of the respondents 79% were m.rried. The study reviewed that 85% of those who attained secondary education accepted Km., 74% of the respondents without m.nthly incom. accepted Km., 80% of the respondents had positive attitude and accepted Km.. 82% of the respondents who had positive perception accep

关键词： Acceptability Kangaroo m.ther Care Low Birth Weight Babies