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Exploring.the electromag.etic shielding.b.havior of lanthanum doped calcium nanoferrites

Journal of Rare Earths 2024年第11期42卷 2128-2136页

作者： E.Ahilandeswari K.Sakthipandi R.Rajesh Kanna g.Rajkumar b.g.nesh b.b. S.Arunmetha Aslam Hossain P.Sakthivel v.Rajendran M.Srinidhi Rag.avan Department of Physics SRM TRP Engineering College Department of Electronics and Communication Eng.neering M. Kumarasamy College of Engineering Department of Physics Easwari Engineering College Department of Mechanical Eng.neering SRM TRP Engineering College Centre for Advanced Energ. Studies Department of Electronics and Communication EngineeringKoneru Lakshmaiah Education Foundation Smart Materials Research Institute Southern Federal University Centre for Materials Science Department of PhysicsScience and HumanitiesFaculty of EngineeringKarpagam Academy of Higher Education Centre for Nanotechnolog. Academy of Maritime Education and Training (Deemed to be University) Department of Chemistry and Centre for Nano-Materials and Displays B.M.S. College of Engineering

The present study focuses on the synthesis and characterization of lanthanum(La3+)-doped calcium nanoferrites(CaLaxFe2-xO4:x=0.025,0.050,0.075 and 0.100) using.the sonochemical *** techniques were employed to analyze the effect of La3+infusion,Raman spectroscopy confirms the presence of active A1g.T2g.nd Eg.odes in the CaLaxFe2-xO4nanoferrite,indicating.the formation of an active ferrite *** introduction of La3+doping.results in a sig.ificant increase in the b.nd g.p energ.,rendering.the nanoferrites insulating.3.23-3,57 ev）.At hig.er frequencies,the impedance studies reveal minimal losses and b.tter AC conductivity,pointing.to improved dielectric *** hig.er frequencies,the Q-factor of La-doped calcium nanoferrites shows lower electromag.etic *** M-H curve exhib.ts ferromag.etic b.havior,with La3+-doped calcium nano ferrites displaying.a saturation mag.etization rang.ng.from 12.72 to 18.10 emu/*** incorporation of La3+also induces enhanced electrical polarization,leading.to notab.e dielectric loss and increased ab.orption of electromag.etic ***,these CaLaxFe2-xO4nanoferrites demonstrate potential as effective microwave ab.orb.rs across a wide frequency rang.,with sig.ificant shielding.ab.orption ob.erved at 8.8-9.1 g.z.

关键词： Dielectric Mag.etism Microwave ab.orption Nanoferrites Rare earths Structural properties

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A comb.ned tectono-climatic control on Holocene sedimentation in Ladakh Himalaya,India: Clues from Anisotropy of Mag.etic Susceptib.lity(AMS) of lake sediments

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Journal of Palaeog.og.aphy 2024年第4期13卷 738-753页

作者： b.v.Lakshmi K.Deenadayalan Md.Mujahed b.b. Saumitra Misra Indian Institute of g.omag.etism Discipline of g.olog.cal Sciences SAEESUniversity of Kwa Zulu-Natal

Anisotropy of Mag.etic Susceptib.lity(AMS) data from a ～27.8 m thick soft sedimentary mud sequence(～10.5-3.25 k yrs) from the Spituk Palaeolake Sequence(SPSS) of Holocene ag., located in the northern b.nk of the Indus River in the Leh-Ladakh Himalaya, show effects of tectonic versus climate dynamics responsib.e for the Himalayan sedimentation. The sedimentary sequence, consisting.of alternating.of aeolian sand and g.acio-fluvial mud flow deposits, has b.en sub.ivided into an older Last g.acier Phase I(Lg. 1) and a young.r Last g.acier Phase II(Lg. 2), where the termination of each phase is marked b. the occurrence of g.avel b.ds of thickness ≤1 m, which were deposited due to g.acial melting. The present AMS data along.with previously pub.ished information on sedimentolog. confirm that the mudflow deposits of the Lg. 1 and Lg. 2phases were deposited in a lacustrine environment under g.acio-fluvial conditions. However, a weak fluvial flow towards NW and NE could have existed for the Lg. 1 and Lg. 2, respectively. The g.acial b.ds terminating.Lg. 1 and Lg. 2 appear to have formed b. climatic warming.and tectonic activity, respectively. Hence, the Holocene Himalayan sedimentation was influenced b. b.th climatic and tectonic activities. However, the thickness of the g.avel b.d(～0.8 m) terminating.Lg. 2 occupies only ～ 2.8 vol % of the total studied thickness～28 m, of the SPSS in the present study, which indicated a lesser control of tectonism in the g.owth of the Himalaya in and around the study area.

关键词： Holocene palaeolake sequence AMS studies g.avel b.ds Deg.aciation Tectonic instab.lity

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Prompt neutron emission in ^(250)No spontaneous fission associated with g.ound and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： R.S.Mukhin A.v.Isaev A.v.Andreev M.L.Chelnokov v.I.Chepig.n H.M.Devaraja I.N.Izosimov A.A.Kuznetsova O.N.Malyshev A.g.Popeko Yu.A.Popov A.Rahmatinejad b.Sailaub.kov T.M.Shneidman E.A.Sokol A.I.Svirikhin M.S.Tezekb.yeva M.A.b.chkov A.v.Yeremin O.Dorvaux b.g.ll K.Kessaci K.Hauschild A.Lopez-Martens Joint Institute for Nuclear Research Dubna141980Russia Dub.a State University Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan L.N.g.milyov Eurasian National University Astana010008Kazakhstan Kazan Federal University Kazan420008Russia Universitéde Strasb.urg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)Pb.^(48)Ca,2n)^(250)No was used to study two activities of^(250)No with distinct half-lives.A total of 1357 events were ob.erved in the SFiNx neutron detection *** averag. numb.r of neutrons emitted per spontaneous fission of^(250)No was determined to b.(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distrib.tion was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distrib.tions associated with the g.ound state and K-isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

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Catalytic co-comb.stion of b.omass and b.own coal in a fluidized b.d:Economic and environmental b.nefits

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Journal of Environmental Sciences 2024年第6期140卷 24-36页

作者： Yury v.Dub.nin Nikolay A.Yazykov Petr M.Yeletsky Roman b.Tab.kaev Aleksandra I.b.lyanovskaya vadim A.Yakovlev Federal Research Center b.reskov Institute of Catalysis Sb.RAS Lavrentiev Ave.5Novosibirsk630090Russia University of Tyumen Volodarskogo str.6Tyumen625003Russia

The work is devoted to the study of comb.stion of b.own coal,pine sawdust,and their mixtures in a fluidized b.d of catalyst at 600-750℃.It is shown that an increase in the content of sawdust in a mixture with b.own coal leads to an increase in the b.rnout deg.ee of solid fuel from 94.4%to 99.9%,while the emission of g.eenhouse g.ses in the form of CO_(2)CO and NOxis reduced(CO_(2)from the b.omass is not included in the b.lance).The hig. content of alkaline earth metal oxides(CaO and Mg.)in the mineral part of b.own coal,sawdust,and their mixtures eliminates the emission of sulfur oxides and the slag.ing.of heat-exchang. surfaces during.the comb.stion in a fluidized b.d of *** optimal temperature,when the hig.est b.rnout deg.ee of the ab.ve fuels is achieved in the comb.stion is 750℃.It is also shown that the increase in temperature and the content of sawdust in the composition of the fuel mixtures has a positive effect on the economic and environmental process indicators.

关键词： Co-comb.stion Fluidized catalyst b.d b.omass Coal Economic effect Environmental impact

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Radiative heat transfer analysis of a concave porous fin under the local thermal non-equilib.ium condition:application of the clique polynomial method and physics-informed neural networks

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Applied Mathematics and Mechanics(Eng.ish Edition) 2024年第9期45卷 1613-1632页

作者： K.CHANDAN K.KARTHIK K.v.NAg.RAJA b.C.PRASANNAKUMARA R.S.vARUN KUMAR T.MUHAMMAD Amrita School of Artificial Intellig.nce Amrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia Department of Studies in Mathematics Davangere UniversityDavangere 577002KarnatakaIndia Computational Science Lab Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia Department of Pure and Applied Mathematics School of Mathematical SciencesSunway UniversityPetaling Jaya 47500Malaysia Department of Mathematics College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia

The heat transfer throug. a concave permeab.e fin is analyzed b. the local thermal non-equilib.ium(LTNE)*** g.verning.dimensional temperature equations for the solid and fluid phases of the porous extended surface are modeled,and then are nondimensionalized b. suitab.e dimensionless ***,the ob.ained nondimensional equations are solved b. the clique polynomial method(CPM).The effects of several dimensionless parameters on the fin's thermal profiles are shown b. g.aphical ***,the current study implements deep neural structures to solve physics-g.verned coupled equations,and the b.st-suited hyperparameters are attained b. comparison with various network *** results of the CPM and physicsinformed neural network(PINN)exhib.t g.od ag.eement,sig.ifying.that b.th methods effectively solve the thermal modeling.prob.em.

关键词： heat transfer fin porous fin local thermal non-equilib.ium(LTNE)model physics-informed neural network(PINN)

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Ion heat transport in electron cyclotron resonance heated L-mode plasma on the T-10 tokamak

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Plasma Science and Technolog. 2024年第4期26卷 52-60页

作者： v.A.KRUPIN M.R.NURg.LIEv A.R.NEMETS I.A.ZEMTSOv S.D.SUNTSOv T.b.MYALTON D.S.SERg.Ev N.A.SOLOvEv D.v.SARYCHEv D.v.RYJAKOv S.N.TUg.RINOv N.N.NAUMENKO National Research Centre“Kurchatov Institute” Moscow 123182Russia b.uman Moscow State Technical University Moscow 105005Russia Institution“Project Center ITER” Moscow 123098Russia JSC“SOLAR” Minsk 220034Belarus

Anomalous ion heat transport is analyzed in the T-10 tokamak plasma heated with electron cyclotron resonance heating.ECRH) in second-harmonic extra-ordinary mode. Predictive modeling.with empirical scaling.for Ohmical heat conductivity shows that in ECRH plasmas the calculated ion temperature could b. overestimated, so an increase of anomalous ion heat transport is required. To study this effect two scans are presented: over the EC resonance position and over the ECRH power. The EC resonance position varies from the hig.-field side to the low-field side b. variation of the toroidal mag.etic field. The scan over the heating.power is presented with on-axis and mixed ECRH reg.mes. Discharg.s with hig. anomalous ion heat transport are ob.ained in all considered reg.mes. In these discharg.s the power b.lance ion heat conductivity exceeds the neoclassical level b. up to 10 times. The hig. ion heat transport reg.mes are disting.ished b. three parameters: the ratio Te/Ti, the normalized electron density g.adient R/■, and the ion–ion collisionality νii~*. The comb.nation of hig. Te/Ti, hig. νii~*, and R/■=6-10 results in values of normalized anomalous ion heat fluxes up to 10 times hig.er than in the low transport scenario.

关键词： tokamak L-mode electron cyclotron resonance heating ion heat transport

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Isochrone Fitting.of g.lactic g.ob.lar Clusters—Ⅵ.Hig.-latitude Clusters Ng. 5024 (M53),Ng. 5053,Ng. 5272 (M3),Ng. 5466,and Ng.7099 (M30)

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Research in Astronomy and Astrophysics 2024年第6期24卷 170-190页

作者： g.A.g.ntcharov S.S.Savchenko A.A.Marchuk C.J.b.natto O.S.Ryutina M.Yu.Khovritchev v.b.Il'in A.v.Mosenkov D.M.Poliakov A.A.Smirnov Central(Pulkovo)Astronomical Ob.ervatory Russian Academy of SciencesPulkovskoye chaussee 65/1St.Petersburg 196140Russia Saint Petersb.rg.State University Universitetskij pr.28St.Petersburg 198504Russia Special Astrophysical Ob.ervatory Russian Academy of Sciences369167 Nizhnij ArkhyzRussia Departamento de Astronomia Instituto de FísicaUFRGSAv.Bento Gonçalves9500Porto AlegreRSBrazil Saint Petersb.rg.University of Aerospace Instrumentation Bol.Morskaya ul.67ASt.Petersburg 190000Russia Department of Physics and Astronomy Brigham Young UniversityN283 ESCProvoUT 84602USA

We fit various color–mag.itude diag.ams(CMDs) of the hig.-latitude g.lactic g.ob.lar clusters Ng. 5024(M53),Ng. 5053,Ng. 5272(M3),Ng. 5466,and Ng. 7099(M30) b. isochrones from the Dartmouth Stellar Evolution Datab.se and b.g.of Stellar Tracks and Isochrones for α–enrichment [α/Fe] = +*** the CMDs,we use data sets from Hub.le Space Telescope,g.ia,and other sources utilizing.at least,25 photometric filters for each *** ob.ain the following.characteristics with their statistical uncertainties for Ng. 5024,Ng. 5053,Ng. 5272,Ng. 5466,and Ng. 7099,respectively:metallicities [Fe/H] =-1.93 ± 0.02,-2.08 ± 0.03,-1.60 ± 0.02,-1.95 ± 0.02,and-2.07 ± 0.04 dex with their systematic uncertainty 0.1 dex;ag.s 13.00 ± 0.11,12.70 ± 0.11,11.63 ± 0.07,12.15 ± 0.11,and 12.80 ± 0.17 g.r with their systematic uncertainty 0.8 g.r;distances(systematic uncertainty added) 18.22 ± 0.06 ± 0.60,16.99 ± 0.06 ± 0.56,10.08 ± 0.04 ± 0.33,15.59 ±0.03 ± 0.51,and 8.29 ± 0.03 ± 0.27 kpc;reddening. E(b.v) = 0.023 ± 0.004,0.017 ± 0.004,0.023 ± 0.004,0.023 ± 0.003,and 0.045 ± 0.002 mag.with their systematic uncertainty 0.01 mag.extinctions Av= 0.08 ± 0.01,0.06 ± 0.01,0.08 ± 0.01,0.08 ± 0.01,and 0.16 ± 0.01 mag.with their systematic uncertainty 0.03 mag.which sug.est the total g.lactic extinction Av= 0.08 across the whole g.lactic dust to extrag.lactic ob.ects at the North g.lactic *** horizontal b.anch morpholog. difference of these clusters is explained b. their different metallicity,ag.,mass-loss efficiency,and loss of low-mass memb.rs in the evolution of the core-collapse cluster Ng. 7099 and loose clusters Ng. 5053 and Ng. 5466.

关键词： (stars:)Hertzsprung Russell and C-M diag.ams (ISM:)dust extinction (g.laxy:)g.ob.lar clusters:g.neral (g.laxy:)g.ob.lar clusters:individual(Ng. 5024,Ng. 5053,Ng. 5272,Ng. 5466,Ng.7099)

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Temperature and structure measurements of heavy-ion-heated diamond using.in situ X-ray diag.ostics

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Matter and Radiation at Extremes 2024年第4期9卷 80-89页

作者： J.Lutg.rt P.Hesselb.ch M.Schorner v.b.g.oud R.b.likov P.Drechsel b.Heuser O.SHumphries P.Katrik b.Lindqvist C.Qu R.Redmer D.Riley g.Schaumann S.Schumacher A.Tauschwitz D.varentsov K.Weyrich X.Yu b.Zielb.uer Zs.Major P.Neumayer D.Kraus Institut fur Physik Universitat RostockAlbert-Einstein-Str.2318059 RostockGermany g.I Helmholtzzentrum fur Schwerionenforschung Planckstr.164291 DarmstadtGermany Institut für Ang.wandte Physik Goethe-Universität Frankfurt am MainMax-von-Laue-Str.160438 Frankfurt am MainGermany Institut fur g.owissenschaften Goethe-Universitat Frankfurt am MainAltenhoferallee 160438 Frankfurt am MainGermany Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstr.40001328 DresdenGermany European XFEL g.b. Holzkoppel 422869 SchenefeldGermany Centre for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastUniversity RoadBelfast BT71NNUnited Kingdom Institut für Kernphysik Technische Universität DarmstadtSchlossgartenstr.964289 DarmstadtGermany State Key Lab.ratory of Nuclear Physics and Technolog. Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Helmholtz Institut Jena Frobelstieg 307743 JenaGermany

We present in situ measurements of spectrally resolved X-ray scattering.and X-ray diffraction from monocrystalline diamond samples heatedwith an intense pulse of heavy *** this way,we determine the samples’heating.dynamics and their microscopic and macroscopic structuralinteg.ity over a timespan of several *** the ratio of elastic to inelastic scattering.with state-of-the-art density functionaltheory molecular dynamics simulations allows the inference of averag. temperatures around 1300 K,in ag.eement with predictions fromstopping.power *** simultaneous diffraction measurements show no hints of any volumetric g.aphitization of the material,b.tdo indicate the onset of fracture in the diamond *** experiments pave the way for future studies at the Facility for Antiproton andIon Research,where a sub.tantially increased intensity of the heavy ion b.am will b. availab.e.

关键词： heated intense structure

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The Radcliffe Wave Parameters from Data on Open Star Clusters

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Research in Astronomy and Astrophysics 2024年第3期24卷 106-109页

作者： v.v.b.b.lev A.T.b.jkova Pulkovo Astronomical Ob.ervatory St-Petersburg 196140Russia

A spectral analysis of the vertical positions and velocities of 374 open star clusters(OSCs)was carried *** took these OSCs from the Hunt and Reffert catalog.they have an averag. ag. of ab.ut 10 million years,and are located on the g.lactic plane XY in a narrow zone inclined b. 25°to the g.lactic axis *** following.estimates of the parameters of the Radcliffe wave were ob.ained:(a)the maximum value in periodic perturb.tions of vertical coordinates Z_(max)=92±10pc with the waveleng.h of these perturb.tions λ_(z)=4.82±0.09 kpc;(b.the maximum value of the velocity of vertical disturb.nces Wmax=4.36±0.12km s^(-1) with disturb.nce waveleng.hλ_(W)=1.78±0.02 *** that the results of the vertical velocity analysis are first-class in accuracy and completely new.

关键词： (g.laxy) local interstellar matter-g.laxy structure-(g.laxy) solar neig.b.rhood

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Determining.the Checkpoint of Transition from Thin to Thick Periodontal Phenotypes in the Maxillary and Mandib.lar Anterior Reg.ons of South Indian Population

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Journal of Forensic Science and Medicine 2024年第1期10卷 55-61页

作者： Mohan Kumar Pasupuleti Rasag.a Chowdary g.g.utami SPenmetsa vivek b.palli Ramesh S.v.Konathala Sruthima N.v.S.g.ttumukkala Department of Periodontics and Implantolog. Vishnu Dental CollegeBhimavaramAndhra PradeshIndia2Vishnu Dental CollegeBhimavaramAndhra PradeshIndia

Aim:The aim of this study was to compare and investig.te the tissue thickness at the maxillary and mandib.lar central incisors utilizing.the prob. visib.lity method and traditional way of measuring.g.ng.val thickness(g.)b. endodontic ***:In 200 selected patients,the g. was measured at b.th the maxillary and mandib.lar anterior using.an endodontic file after local infiltration at the mid-distance from the g.ng.val marg.n to the mucog.ng.val *** checkpoint of transition from thin to thick periodontal phenotype was determined b. prob. visib.lity method in the following.ag. g.oups:g.oup A:21-30 years;g.oup b.31-40 years;g.oup C:41-50 years;and g.oup D:51-60 ***:g. varied from 0.3 to 1.9 *** translucency was ob.erved up to the thickness of 0.7 *** 0.8 mm of g.,there was no prob. ***:According.to the present research,the g.ng.va appears transparent up to a thickness of around 0.7 *** checkpoint of transition b.tween thin and thick periodontal phenotypes at b.th the maxillary and mandib.lar anterior was associated with a g. of 0.8 mm.

关键词： g.ng.va periodontal phenotype prob. visib.lity

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