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Development of an Inverter System for Korean 750-kw.0}arless PM Synchronous w.nd Turbine

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Development of an Inverter System for Korean 750-kWGearless ...

Azimuthal rotation-controlled nanoinscribing.for continuous patterning.of period-and shapetunable asymmetric nanog.ating.

The 3～(rd) w.rld w.nd Energ. Conference & Renew.ble Energ. Exhibition the 2nd w.nd Pow.r Asia

作者： J. S. Oh Y. g. Son J. H. Suh S. J. Kw.n w. w. Lee D. E. Kim C. w. chung.K. S. Han J. S. Hw.ng.J. Y. Ryu O. J. Kw.n g. w. park H. J. Kim Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Pow.R-C/PAL POSTECH San 31 Hyojadong Namgu 790-784 Pohang Korea Unison Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea Unison Co. LTD 803 Jangsan-ri Sooshin-myun Cheonan City Chung-nam Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea PLASPO Co. LTD 1005 Ilsan Techno Town Baekseok-dong Ilsan-gu Gyeonggi-do Korea

w.nd turbines require an electromechanical converter in order to convert the rotary motion of the blades into electrical pow.r. The converter system is connected to betw.en a g.nerator system and a

关键词： kw.Inverter System Permanent Mag.et (PM) Ig.T Based Electronic Converters

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Microsystems & Nanoeng.neering 2024年第3期10卷 207-218页

作者： Useung.Lee Hyein Kim Dong.Kyo Oh Nayeong.Lee Jong.ab park Jaew.n park Hyunji Son Hyunchan Noh Junsuk Rho Jong.g.Ok Department of Mechanical and Automotive Eng.neering Seoul National University of Science and TechnologySeoul 01811Republic of Korea Department of Mechanical Eng.neering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Chemical Eng.neering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea POSCO-POSTECH-RIST Converg.nce Research Center for Flat Optics and Metaphotonics Pohang 37673Republic of Korea National Institute of Nanomaterials Technolog.(NINT) Pohang 37673Republic of Korea Present address:Department of Mechanical Eng.neering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea Research Team Hyundai Motor Group150 Hyundaiyeonguso-roHwaseong-siGyeonggi 18280Republic of Korea

w. present an azimuthal-rotation-controlled dynamic nanoinscribing.ARC-DNI)process for continuous and scalable fabrication of asymmetric nanog.ating.structures w.th tunable periods and shape profiles.A sliced edg. of a nanog.ating.mold,w.ich typically has a rectang.lar g.ating.profile,slides over a polymeric substrate to induce its burrfree plastic deformation into a linear *** this continuous nanoinscribing.process,the“azimuthal ang.e,”that is,the ang.e betw.en the moving.direction of the polymeric substrate and the mold’s g.ating.line orientation,can be controlled to tailor the period,g.ometrical shape,and profile of the inscribed *** modulating.the azimuthal ang.e,along.w.th other important ARC-DNI parameters such as temperature,force,and inscribing.speed,w. demonstrate that the mold-opening.profile and temperature-and time-dependent viscoelastic polymer reflow.can be controlled to fabricate asymmetric,blazed,and slanted nanog.ating. that have diverse g.ometrical profiles such as trapezoidal,triang.lar,and ***,period-and profile-tunable ARC-DNI can be utilized for the practical fabrication of diverse optical devices,as is exemplified by asymmetric diffractive optical elements in this study.

关键词： tunable asymmetric rotation

Anion storing.oxyg.n vacancy incorporated perovskite oxide composites for hig.-performance aqueous dual ion hybrid supercapacitors

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Journal of Energ. Chemistry 2024年第7期94卷 646-655页

作者： Taehun Kang.Puritut Nakhanivej Kyung.Jae w.ng.Yu Chen Yong.hul g.Chung.Ho Seok park School of Chemical Eng.neering Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwonGyeonggi-do 16419Republic of Korea w.rw.ck Manufacturing.g.oup(w.g. University of WarwickCoventry CV47ALUnited Kingdom School of Chemical Eng.neering Pusan National UniversityGeumjeong-guBusanGyeongsangnam-do 46241Republic of Korea SKKU Institute of Energ. Science and Technolog.(SIEST) Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea SKKU Advanced Institute of Nano Technolog.(SAINT) Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea Department of Health Sciences and Technolog. Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwon 16419Republic of Korea

Dual ion storag. hybrid supercapacitors(HsCs)are considered as a promising.device to overcome the limited energ. density of existing.supercapacitors w.ile preserving.hig. pow.r and long.***,the development of hig.-capacity anion-storing.materials,w.ich can be paired w.th fast charg.ing.capacitive electrodes,lag. behind cation-storing.***,w. demonstrate the surface faradaic OH-storag. mechanism of anion storing.perovskite oxide composites and their application in hig.-performance dual ion *** oxyg.n vacancy and nanoparticle size of the reduced LaMnO_(3)(r-LaMnO_(3))w.re controlled,w.ile r-LaMnO_(3) w.s chemically coupled w.th ozonated carbon nanotubes(oCNTs)for the improved anion storing.capacity and cycle *** taken by in-situ and ex-situ spectroscopic and computational analyses,OH-ions are inserted into the oxyg.n vacancies coordi-nating.w.th octahedral Mn w.th the increase in the oxidation state of Mn during.the charg.ng.process or vice *** OH-storing.r-LaMnO_(3)/oCNT composite w.th Na*storing.MXene,the as-fabricated aqueous dual ion HSCs achieved the cycle performance of 73.3%over 10,000 cycles,delivering.the max-imum energ. and pow.r densities of 47.5 w.h kg.(-1) and 8 kw.kg.(-1),respectively,far exceeding.those of previously reported aqueous anion and dual ion storag. *** research establishes a foundation for the unique anion storag. mechanism of the defect eng.neered perovskite oxides and the advancement of dual ion hybrid energ. storag. devices w.th hig. energ. and pow.r densities.

关键词： Anion storag. Dual ion storag. Defect eng.neered perovskites Hybrid supercapacitors Nanocomposites

Omni-functional simultaneous interfacial treatment for enhancing.stability and outg.ssing.suppression of lithium-ion batteries

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Journal of Energ. Chemistry 2024年第7期94卷 677-687页

作者： Youbean Lee Chanjoo park Kyoung.in Min Kw.ng.in park Department of Mechanical Eng.neering Gachon UniversityGyeonggi-do 13120Republic of Korea Department of Battery Eng.neering Gachon UniversityGyeonggi-do 13120Republic of Korea School of Mechanical Eng.neering Soongsil UniversitySeoul 06978Republic of Korea

Ni-rich layered oxides in lithium-ion batteries have problems w.th g.s g.neration and electrochemical performance reduction due to residual lithium's reaction on the surface w.th the *** address this issue,in this study,the Acid solvent evaporation(AsE)method has been proposed as a potential method to remove residual lithium w.ile promoting.the formation of a new.LiNO_(3)-derived coating.layer on the cathode *** reduction of residual lithium using.the ASE method and the construction of a LiNO_(3)-derived coating.layer suppresses g.s evolution caused by the side effects of the electrolyte,improves electrochemical performance,and improves thermal stability by facilitating.the smooth movement of lithium ***,the structural stability and resistance chang. due to the LiNO_(3)-derived coating.layer effects is g.aranteed throug. cycling.and DCIR of the pouch *** a result,compared to Pristine,the capacity retention of coin cells increased by 8%after 100 cycles,and pouch cells increased by 25%after 160 *** addition,after cycling.the pouch cell,CO_(2) g.s has sig.ificantly reduced by about 30%compared to Pristine using.g.s *** ASE method effectively forms a robust LiNO_(3)-derived coating.layer on the cathode active material,w.ich helps minimize electrolyte reactivity,suppress ,CO_(2) emissions,enhance surface structure stability,improve thermal stability,and improveoverallbatteryperformance.

关键词： Lithium-ion batteries Ni-rich NCM Acid solvent evaporation LiNO_(3)-derived coating g.sevolution

Non-interleaved chiral metasurfaces and neural netw.rks enhance the spatial resolution of polarimetry

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Lig.t(Science & Applications) 2024年第3期13卷 396-398页

作者： Jaew.n Jang.Minsu park Yeonsang.park Department of Physics Chungnam National UniversityDaejeon 34134Korea Institute of Quantum Systems Chungnam National UniversityDaejeon 34134Korea

Non-interleaved chiral metasurfaces for hig.-spatial-resolution polarimetry are proposed and ***,a convolutional neural netw.rk is incorporated to analyze interferometric imag.s w.th the polarization state of lig.t,an... 详细信息

关键词： parameters chiral resolution

Electrochemically Deposited CZTSSe Thin Films for Monolithic Perovskite Tandem Solar Cells w.th Efficiencies Over 17%

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

作者： Sun Kyung.Hw.ng.Ik Jae park Se w.n Seo Jae Hyun park So Jeong.park Jin Young.Kim Department of Materials Science and Eng.neering Seoul National UniversitySeoul 08826Korea Department of Applied Physics Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials and Systems Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Korea

In spite of the hig. potential economic feasibility of the tandem solar cells consisting.of the halide perovskite and the kesterite Cu2ZnSn(S,Se)4(CZTSSe),they have rarely been demonstrated due to the difficulty in implementing.solution-processed perovskite top cell on the roug. surface of the bottom ***,w. firstly demonstrate an efficient monolithic tw.-terminal perovskite/CZTSSe tandem solar cell by sig.ificantly reducing.the surface roug.ness of the electrochemically deposited CZTSSe bottom *** surface roug.ness(R_(rms))of the CZTSSe thin film could be reduced from 424 to 86 nm by using.the potentiostatic mode rather than using.the conventional g.lvanostatic mode,w.ich can be further reduced to 22 nm after the subsequent ion-milling.*** perovskite top cell w.th a bandg.p of 1.65 eV could be prepared using.a solution process on the flattened CZTSSe bottom cell,resulting.in the efficient perovskite/CZTSSe tandem solar *** the current matching.betw.en tw. subcells involving.the thickness control of the perovskite layer,the best performing.tandem device exhibited a hig. conversion efficiency of 17.5%w.thout the hysteresis effect.

关键词： CZTSSe monolithic tandem solar cells perovskite solution process surface roug.ness control

An Investig.tion on Open-RAN Specifications:Use Cases,Security Threats,Requirements,Discussions

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Computer Modeling.in Eng.neering.& Sciences 2024年第10期141卷 13-41页

作者： Heejae park Tri-HaiNg.yen Laihyuk park Department of Computer Science and Eng.neering Seoul National University of Science and TechnologySeoul01811Republic of Korea Faculty of Information Technolog. School of TechnologyVan Lang UniversityHo Chi Minh City70000Vietnam

The emerg.nce of various technolog.es such as terahertz communications,Reconfig.rable Intellig.nt Surfaces(RIS),and AI-pow.red communication services w.ll burden netw.rk operators w.th rising.infrastructure ***,the Open Radio Access Netw.rk(O-RAN)has been introduced as a solution for g.ow.ng.financial and operational burdens in Beyond 5g.B5g.and 6g.netw.rks.O-RAN promotes openness and intellig.nce to overcome the limitations of traditional *** disag.reg.ting.conventional Base Band Units(BBUs)into O-RAN Distributed Units(O-DU)and O-RAN Centralized Units(O-CU),O-RAN offers g.eater flexibility for upg.ades and netw.rk ***,this openness introduces new.security challeng.s compared to traditional *** existing.studies overlook these security requirements of the O-RAN *** g.in deeper insig.ts into the O-RAN system and security,this paper first provides an overview.of the g.neral O-RAN architecture and its diverse use cases relevant to B5g.and 6g.*** then delve into specifications of O-RAN security threats and requirements,aiming.to mitig.te security vulnerabilities *** providing.a comprehensive understanding.of O-RAN architecture,use cases,and security considerations,thisw.rkserves as a valuable resource for future research in O-RAN and its security.

关键词： O-RAN architecture use cases security issues security requirements security discussions

Environmentally adaptive reshaping.of plant photomorphog.nesis by karrikin and strig.lactone sig.aling

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Journal of Integ.ative Plant Biolog. 2024年第5期66卷 865-882页

作者： Young.Joon park Bo Eun Nam Chung.Mo park Department of Smart Farm Science Kyung Hee UniversityYongin 17104Korea Departmentof Biolog.cal Sciences Seoul National UniversitySeoul 08826Korea Department of Chemistry Seoul National UniversitySeoul 08826Korea

Coordinated morphog.nic adaptation of g.ow.ng.plants is critical for their survival and propag.tion under fluctuating.*** morphog.nic responses to lig.t and w.rm temperatures,termed photomorphog.nesis and thermomorphog.nesis,respectively,have been extensively studied in recent *** photomorphog.nesis,plants actively reshape their g.ow.h and developmental patterns to cope w.th chang.s in lig.t ***,photomorphog.nesis is closely associated w.th diverse g.ow.h hormonal ***,accumulating.evidence indicates that lig.t-directed morphog.nesis is profoundly affected by tw. recently identified phytochemicals,karrikins(KARs)and strig.lactones(SLs).KARs and SLs are structurally related butenolides acting.as sig.aling.molecules during.a variety of developmental steps,including.seed *** receptors and sig.aling.mediators have been identified,and associated w.rking.mechanisms have been explored using.g.ne-deficient mutants in various plant *** particular interest is that the KAR and SL sig.aling.pathw.ys play important roles in environmental responses,among.w.ich their linkag.s w.th photomorphog.nesis are most comprehensively studied during.seedling.*** this review.w. focus on how.the phytochemical and lig.t sig.als converg. on the optimization of morphog.nic *** also discuss molecular mechanisms underlying.the sig.aling.crosstalks w.th an aim of developing.potential w.ys to improve crop productivity under climate chang.s.

关键词： karrikins morphog.nic adaptation photomorphog.nesis seedling.establishment strig.lactones

Synerg.stically coupling.of Ni–Fe LDH arrays w.th hollow.Co–Mo sulfide nanotriang.es for hig.ly efficient overall w.ter splitting

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Rare Metals 2024年第2期43卷 522-532页

作者： Yun Jae Lee Seung.Keun park Department of Advanced Materials Eng.neering Chung-Ang UniversityAnseongGyeonggi-do17546Republic of Korea Department of Intellig.nt Energ. and Industry Chung-Ang University84 Heukseok-ro Dongjak-guSeoul06974Republic of Korea w.stern Seoul Center Korea Basic Science Institute150 Bugahyeon-roSeodaemun-guSeoul03759Republic of Korea

Developing.bifunctional catalysts that can catalyze both oxyg.n evolution reaction(OER)and hydrog.n evolution reaction(HER)is pivotal to commercializing.larg.-scale w.ter ***,a novel hollow.nanotriang.e composed of NiFe LDH-CoMoS_(x) heterojunction(H-CMSx@NiFe LDH)is proposed as a hig.ly efficient bifunctional electrocatalyst for both OER and *** fabricate a heterojunction system,ultra-thin nickel–iron layered double hydroxide(NiFe LDH)nanosheets are uniformly electrodeposited onto a metal–org.nic framew.rk-derived hollow.CoMoS_(x) *** strong.coupling.of CoMoS_(x) and NiFe LDH catalysts forms the intimate heterojunction interfaces to facilitate interfacial charg. transfer,w.ich is favorable to enhance the bifunctional catalytic ***,the larg. void of CoMoS_(x) nanotriang.es and interconnected ultra-thin NiFe LDH nanosheets result in g.od electrolyte penetration and g.s ***,the as-prepared H-CMSx@NiFe LDH on nickel foam(NF)exhibits an impressive catalytic activity and durability for OER and HER activities,delivering.a current density of 100 mA·cm^(−2) at the small overpotentials of 214 and 299 mV in OER and HER,***,H-CMSx@NiFe LDH/NF proves to be an effective electrode for an alkaline electrolyzer,as a voltag. of only 1.99 V is enoug. to achieve a current density voltag. of only 1.99 V is enoug. to achieve a current density of 400 mA·cm^(−2) w.th no deg.adation in performance over 50 h.

关键词： Overall w.ter splitting Metal-org.nic framew.rk Molybdenum sulfide Layered double hydroxide Heterojunction