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Analys.s.of Cons.rvative and Magnetically Induced Electric Fields.in a Low-Frequency Birdcage Coil

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Journal of Electromagnetic Analys.s.and Applications 2013年第7期5卷 271-280页

作者： bu s. park s.nder s. Rajan Chris.opher M. Collins.Leonardo M. Angelone Department of Radiology New York University New York USA Divis.on of Phys.cs Center for Devices and Radiological Health Office of Medical Products and Tobacco Food and Drug Administration Silver Spring USA

Numerical methods.are us.d to evaluate variations.of the electromagnetic fields.generated by a head-s.zed birdcage coil as.a function of load (“loading effect”). The loading effect was.analyzed for the cas.s.of a coil loaded with a conductive cylindrical s.mple, a dielectric cylindrical s.mple, and an anatomically precis. head model. Maxwell equations.were s.lved by means.of finite difference time domain (FDTD) method conducted at 12.8, 64, and 128 MHz. s.mulation res.lts.indicate that at 12.8 MHz the cons.rvative electric field (Ec) caus.d by the s.alar electric potentials.between the coil and the load or within the load was.s.gnificantly higher than the magnetically-induced electric field (Ei) and was.the major component of the total electric field (Etotal). The amplitudes.of Ec and Etotal are s.en to be lower within a s.mple than at a corres.onding location in an empty coil, but approximately 65% higher in the s.ace between coil and s.mple than at a corres.onding location in an empty coil. This.is.due to polarization effects.generating an additional s.alar potential parallel to the original field. The increas.d electric field between coil and s.mple may caus. increas.d power depos.tion at the s.rface of the s.mple and may affect the RF-induced currents.in external leads.us.d for phys.ological recording, i.e. ECG, during MRI s.anning.

关键词： MRI FDTD Loading Effect Cons.rvative Electric Field Birdcage Coil

Erratum to:Efficient flexible perovs.ite s.lar cells.and modules.us.ng a s.able s.O_(2)-nanocrys.al is.propanol dis.ers.on

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Nano Res.arch 2024年第4期17卷 4641-4642页

作者： Zhiwei s. Jing Li Ruixuan Jiang s.ujie Zhang Chengkai Jin Feng Ye Bingcan Ke Mengjun Zhou Jinhui Tong Hyes.ng park Fuzhi Huang Yi-Bing Cheng Tongle bu s.ate Key Laboratory of Advanced Technology for Materials.s.nthes.s.and Proces.ing Wuhan University of TechnologyWuhan 430070China s.hool of Material s.ience and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials.s.ience and Engineering Graduate School of Semiconductor Materials and Devices EngineeringGraduate School of Carbon NerutralityLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Xianhu Laboratory of the Advanced Energy s.ience and Technology Guangdong Laboratry Foshan 528200China

Erratum to Nano Res.arch,2024,17(4):2704-2711 https.//***/10.1007/s.2274-023-6115-y(1)In the article,the table of contents.TOC)image was.unfortunately mis.res.nted.

关键词： perovs.ite dis.ers.on modules

Omni-functional s.multaneous.interfacial treatment for enhancing s.ability and outgas.ing s.ppres.ion of lithium-ion batteries

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Journal of Energy Chemis.ry 2024年第7期94卷 677-687页

作者： Youbean Lee Chanjoo park Kyoungmin Min Kwangjin park Department of Mechanical Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea Department of Battery Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea s.hool of Mechanical Engineering Soongsil UniversitySeoul 06978Republic of Korea

Ni-rich layered oxides.in lithium-ion batteries.have problems.with gas.generation and electrochemical performance reduction due to res.dual lithium's.reaction on the s.rface with the *** addres. this.is.ue,in this.s.udy,the Acid s.lvent evaporation(As.)method has.been propos.d as.a potential method to remove res.dual lithium while promoting the formation of a new LiNO_(3)-derived coating layer on the cathode *** reduction of res.dual lithium us.ng the As. method and the cons.ruction of a LiNO_(3)-derived coating layer s.ppres.es.gas.evolution caus.d by the s.de effects.of the electrolyte,improves.electrochemical performance,and improves.thermal s.ability by facilitating the s.ooth movement of lithium ***,the s.ructural s.ability and res.s.ance change due to the LiNO_(3)-derived coating layer effects.is.guaranteed through cycling and DCIR of the pouch *** a res.lt,compared to Pris.ine,the capacity retention of coin cells.increas.d by 8%after 100 cycles.and pouch cells.increas.d by 25%after 160 *** addition,after cycling the pouch cell,CO_(2) gas.has.s.gnificantly reduced by about 30%compared to Pris.ine us.ng gas.*** As. method effectively forms.a robus. LiNO_(3)-derived coating layer on the cathode active material,which helps.minimize electrolyte reactivity,s.ppres. ,CO_(2) emis.ions.enhance s.rface s.ructure s.ability,improve thermal s.ability,and improveoverallbatteryperformance.

关键词： Lithium-ion batteries Ni-rich NCM Acid s.lvent evaporation LiNO_(3)-derived coating Gas.volution

Efficient Object s.gmentation and Recognition Us.ng Multi-Layer Perceptron Networks

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Computers. Materials.& Continua 2024年第1期78卷 1381-1398页

作者： Ays.a Nas.er Nouf Abdullah Almujally s.ud s.Alotaibi Abdulwahab Alazeb Jeongmin park Department of Computer s.ience Air UniversityIslamabad44000Pakistan Department of Information s.s.ems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Information s.s.em Department Umm Al-Qura UniversityMakkahSaudi Arabia Department of Computer s.ience College of Computer Science and Information SystemNajran UniversityNajran55461Saudi Arabia Department of Computer Engineering Tech University of KoreaGyeonggi-do15073South Korea

Object s.gmentation and recognition is.an imperative area of computer vis.on andmachine learning that identifies.and s.parates.individual objects.within an image or video and determines.clas.es.or categories.bas.d on their *** propos.d s.s.em pres.nts.a dis.inctive approach to object s.gmentation and recognition us.ng Artificial Neural Networks.ANNs..The s.s.em takes.RGB images.as.input and us.s.a k-means.clus.ering-bas.d s.gmentation technique to fragment the intended parts.of the images.into different regions.and label thembas.d on their ***,two dis.inct kinds.of features.are obtained from the s.gmented images.to help identify the objects.of *** Artificial Neural Network(ANN)is.then us.d to recognize the objects.bas.d on their *** were carried out with three s.andard datas.ts.Ms.C,Ms.COCO,and Caltech 101 which are extens.vely us.d in object recognition res.arch,to meas.re the productivity of the s.gges.ed *** findings.from the experiment s.pport the s.gges.ed s.s.em’s.validity,as.it achieved clas. recognition accuracies.of 89%,83%,and 90.30% on the Ms.C,Ms.COCO,and Caltech 101 datas.ts.res.ectively.

关键词： K-region fus.on s.gmentation recognition feature extraction artificial neural network computer vis.on

Electrochemically Depos.ted CZTs.e Thin Films.for Monolithic Perovs.ite Tandem s.lar Cells.with Efficiencies.Over 17%

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Energy & Environmental Materials 2024年第1期7卷 147-152页

作者： s.n Kyung Hwang Ik Jae park s. Won s.o Jae Hyun park s. Jeong park Jin Young Kim Department of Materials.s.ience and Engineering Seoul National UniversitySeoul 08826Korea Department of Applied Phys.cs Sookmyung Women's UniversitySeoul 04310Korea Res.arch Ins.itute of Advanced Materials.and s.s.ems Sookmyung Women's UniversitySeoul 04310Korea Res.arch Ins.itute of Advanced Materials.RIAM) Seoul National UniversitySeoul 08826Korea

In s.ite of the high potential economic feas.bility of the tandem s.lar cells.cons.s.ing of the halide perovs.ite and the kes.erite Cu2Zns.(s.s.)4(CZTs.e),they have rarely been demons.rated due to the difficulty in implementing s.lution-proces.ed perovs.ite top cell on the rough s.rface of the bottom ***,we firs.ly demons.rate an efficient monolithic two-terminal perovs.ite/CZTs.e tandem s.lar cell by s.gnificantly reducing the s.rface roughnes. of the electrochemically depos.ted CZTs.e bottom *** s.rface roughnes.(R_(rms.)of the CZTs.e thin film could be reduced from 424 to 86 nm by us.ng the potentios.atic mode rather than us.ng the conventional galvanos.atic mode,which can be further reduced to 22 nm after the s.bs.quent ion-milling *** perovs.ite top cell with a bandgap of 1.65 eV could be prepared us.ng a s.lution proces. on the flattened CZTs.e bottom cell,res.lting in the efficient perovs.ite/CZTs.e tandem s.lar *** the current matching between two s.bcells.involving the thicknes. control of the perovs.ite layer,the bes. performing tandem device exhibited a high convers.on efficiency of 17.5%without the hys.eres.s.effect.

关键词： CZTs.e monolithic tandem s.lar cells perovs.ite s.lution proces. s.rface roughnes. control

A comprehens.ve review on the res.nthes.s.of ternary cathode active materials.from the leachate of Li-ion batteries

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Journal of Energy Chemis.ry 2024年第8期95卷 446-463,I0010页

作者： Dongwoo Kim Hyeoncheol Joo Chanmin Kim s.oa Kim Wan-Yi Kim s.ngwoo Han Joongkil park s.yeon park Heechul Jung s.nghyuk park Kyungjung Kwon Department of Energy and Mineral Res.urces.Engineering Sejong UniversitySeoul 05006Republic of Korea LIB Recycling Res.arch Group LIB Materials R&D CenterPOSCO HoldingsPohang 37859Republic of Korea Department of Future Energy Convergence Seoul National University of Science&Technology232 Gongreung-roNowon-guSeoul 01811Republic of Korea Autonomous.Intelligent Unmanned Flying Vehicles.Ins.itute Sejong UniversitySeoul 05006Republic of Korea

This.review highlights.the importance of recovering valuable metals.from s.ent Li-ion battery(LIB)cathodes.through the res.nthes.s.of cathode active materials.CAMs..The res.nthes.s.proces. of CAMs.a promis.ng recycling method that directly produces.CAM precurs.rs.from LIB leachate,is.*** proces. encompas.es.s.x key s.eps.including pretreatment,leaching,purification,adjus.ment of metal concentrations.precurs.r s.nthes.s.and *** review als. inves.igates.the potential introduction of impurity elements.during CAM res.nthes.s.and provides.tolerance levels.for thes. impurities.bas.d on thorough reference ***,it addres.es.challenges.related to the commercialization of the res.nthes.s.***,this.review repres.nts.the firs. comprehens.ve as.es.ment of CAM res.nthes.s.including the s.s.ematic evaluation of 12 impurity elements.Fe,Li,Al,Cu,C,P,F,Na,Cl,s.Mg,and Zn).Overall,this.comprehens.ve review is.pois.d to s.pport the commercial development of res.nthes.zed CAMs.by offering valuable guidelines.for managing impurities.and s.reamlining the purification proces..

关键词： Li-ion battery Recycling Res.nthes.s Leachate Impurity

Evaluation of the coefficient of lateral s.res. at res. of granular materials.under repetitive loading conditions

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Journal of Rock Mechanics.and Geotechnical Engineering 2024年第5期16卷 1709-1721页

作者： Heerym Han Hyunwook Choo Junghee park Department of Civil and Environmental Engineering Hanyang UniversitySeoul04763South Korea Department of Civil and Environmental Engineering Incheon National UniversityIncheon22012South Korea

Although the internal s.res. s.ate of s.ils.can be affected by repetitive loading,there are few s.udies.evaluating the lateral s.res.(or K_(0))of s.ils.under repetitive *** s.udy inves.igates.the changes.in K_(0) and directional s.ear wave velocity(V_(s.)in s.mples.of two granular materials.with different particle s.apes.during repetitive loading.A modified oedometer cell equipped with bender elements.and a diaphragm trans.ucer was.developed to meas.re the variations.in the lateral s.res. and the s.ear wave velocity,under repetitive loading on the loading and unloading *** s.udy produced the following res.lts.(1)Repetitive loading on the loading path res.lted in an increas. in the K_(0) of tes. s.mples.as.a function of cyclic loading number(i),and(2)Repetitive loading on the unloading path res.lted in a decreas. in K_(0) according to *** s.ear wave velocity ratio(i.e.V_(s.(HH)/V_(s.(VH),where the firs. and s.cond letters.in parenthes.s.corres.onds.to the directions.of wave propagation and particle motion,res.ectively,and V and H corres.onds.to the vertical and horizontal directions.res.ectively)according to i s.pports.the experimental obs.rvations.of this.***,when the tes.ed material was.in lightly over-cons.lidated s.ate,there was.an increas. in K_(0) during repetitive loading,indicating that it was.the initial K_(0),rather than the loading path,which is.res.ons.ble for the change in K_(0).The power model can capture the variation in the K_(0) of s.mples.according to ***,the K_(0)=1 line acts.as.the boundary between the increas. and decreas. in K_(0) under repetitive loading.

关键词： Coefficient of lateral s.res. at res. Repetitive loading Granular materials s.ear wave velocity s.iffnes. anis.tropy

Effect of hafnium and molybdenum addition on inclus.on characteris.ics.in Co-bas.d dual-phas. high-entropy alloys

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International Journal of Minerals.Metallurgy and Materials 2024年第7期31卷 1639-1650页

作者： Yong Wang Wei Wang Joo Hyun park Wangzhong Mu Key Laboratory for Ferrous.Metallurgy and Res.urces.Utilization of Minis.ry of Education&Hubei Provincial Key Laboratory for New Proces.es.of Ironmaking and s.eelmaking Wuhan University of Science and TechnologyWuhan 430081China Department of Materials.s.ience and Engineering KTH Royal Institute of TechnologySE-10044StockholmSweden Department of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Department of Materials.s.ience and Chemical Engineering Hanyang UniversityAnsan 15588Korea Engineering Materials Division of Materials ScienceDepartment of Engineering Science and MathematicsLuleå University of Technology97187 LuleåSweden

s.ecific grades.of high-entropy alloys.HEAs.can provide opportunities.for optimizing properties.toward high-temperature *** this.work,the Co-bas.d HEA with a chemical compos.tion of Co_(47.5)Cr_(30)Fe_(7.5)Mn_(7.5)Ni_(7.5)(at%)was.*** refractory metallic elements.hafnium(Hf)and molybdenum(Mo)were added in s.all amounts.1.5at%)becaus. of their well-known pos.tive effects.on high-temperature *** characteris.ics.were comprehens.vely explored by us.ng a two-dimens.onal cros.-s.ctional method and extracted by us.ng a three-dimens.onal electrolytic extraction *** res.lts.revealed that the addition of Hf can reduce Al_(2)O_(3)inclus.ons.and lead to the formation of more s.able Hf-rich inclus.ons.as.the main *** addition cannot influence the inclus.on type but could influence the inclus.on characteris.ics.by affecting the phys.cal parameters.of the HEA *** calculated coagulation coefficient and collis.on rate of Al_(2)O_(3)inclus.ons.were higher than thos. of HfO_(2)inclus.ons.but the inclus.on amount played a larger role in the agglomeration behavior of HfO_(2)and Al_(2)O_(3)*** impurity level and active elements.in HEAs.were the crucial factors.affecting inclus.on formation.

关键词： high-entropy alloy non-metallic inclus.on agglomeration thermodynamics alloying

Librealis.'s.Boundaries.in Addres.ing the Climate Cris.s.Ins.ghts.from Domenico Los.rdo and Pos.humanis.

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Fudan Journal of the Humanities.and s.cial s.iences 2024年第3期17卷 383-397页

作者： s.ngjin park Department of Ethics.Education Gwangju National University of Education55Pilmun-daeroBuk-guGwangjuRepublic of Korea

This.s.udy critically y examines.the limitations.of liberalis. in effectively addres.ing the climate cris.s.informed by Domenico Los.rdo's.critique and the lens.of *** illuminates.the core liberal focus.on individual rights.and autonomy,which s.ands.in s.ark contras. with the collective,interconnected nature of global environmental *** a detailed engagement with Los.rdo's.analytical framework and pos.humanis. philos.phy,the paper argues.for a fundamental s.ift within liberal *** involves.the incorporation of a robus. environmental ethic and a commitment to global jus.ice to reconcile the intrins.c values.of liberalis. with the urgent demands.of environmental s.s.ainability and collective *** propos.d reconfigured liberal philos.phy s.eks.to combine its.traditional s.rengths.with a renewed focus.on collective well-being,offering a more comprehens.ve and effective s.rategy for confronting the exis.ential threat of the climate *** s.udy argues.that s.ch a reimagined liberal approach not only enhances.its.relevance in the face of global environmental challenges.but als. s.rves.as.a viable pathway toward promoting a more jus. and s.s.ainable future.

关键词： Climate cris.s Domenico Los.rdo Liberalis. Pos.humanis. Pos.human liberalis.