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Magnesium alloys as alternative anode materials for rechargeable magnesium-ion batteries:Review on the alloying phase and reaction mechanisms

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Journal of Magnesium and Alloys 2024年第9期12卷 3476-3490页

作者： Dedy Setiawan Hyeonjun Lee jangwook pyun Amey Nimkar Netanel Shpigel Daniel Sharon Seung-Tae Hong Doron Aurbach Munseok S.Chae Department of Energy Science and Engineering DGIST(Daegu Gyeongbuk Institute of Science and Technology)Daegu 42988Republic of Korea Research Center for Energy and Environmental Materials(GREEN) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbarakiJapan Department of Nanotechnology Engineering Pukyong National UniversityBusan 48513Republic of Korea Department of Chemistry and BINA-BIU Centre for Nanotechnology and Advanced Materials Bar Ilan UniversityRamat Gan 5290002Israel Department of Chemical Sciences Ariel UniversityAriel 40700Israel Institute of Chemistry The Hebrew University of Jerusalem9190401JerusalemIsrael Department of Chemistry and Chemical Biology University of New MexicoAlbuquerqueNew Mexico 87131United States

Magnesium-ion batteries(MIBs)are promising candidates for lithium-ion batteries because of their abundance,non-toxicity,and favorable electrochemical *** review explores the reaction mechanisms and electrochemical characteristics of Mg-alloy anode *** Mg metal anodes provide high volumetric capacity and dendrite-free electrodeposition,their practical application is hindered by challenges such as sluggish Mg^(2+)ion diffusion and electrolyte ***-type anodes that incorporate groups XIII,XIV,and XV elements have the potential to overcome these *** review various Mg alloys,emphasizing their alloying/dealloying reaction mechanisms,their theoretical capacities,and the practical aspects of ***,we discuss the influence of the electrolyte composition on the reversibility and efficiency of these alloy *** is placed on overcoming current limitations through innovative materials and structural *** review concludes with perspectives on future research directions aimed at enhancing the performance and commercial viability of Mg alloy anodes and contributing to the development of high-capacity,safe,and cost-effective energy storage systems.

关键词： Magnesium-ion battery Anode materials Magnesium alloy Electrochemical alloying

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Vinylic polymerization of Norbornenecarboxylic Acid Esters by Palladium Complexes

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应用化学 2001年第5期18卷 296-300页

作者： CHO，Iwhan pyun，Kwang－Soo 等 DepartmentofChemistryandInterdisciplinaryPrograminPolymerics KoreaAdvancednstituteofScienceandTechnol

New thermoplastic norbornene polymers containing ester groups were prepared byvinylic polymerization of norbornene-carboxylic acid esters by Pd(Ⅱ)-based catalysts. Themonomers were obtained by Diels-Alder reaction of cyclopentadiene with acrylic acid esters(methyl and butyl) as mixtures of endo/exo (ratio 40/60)-isomers and were converted topolymers in 60%～70% conversion. The endo-isomer was less reactive than the *** obtain higher molecular weight the more reactive pure exo-isomer was prepared andpolymerized with the Pd (Ⅱ)-catalysts, tetrakis (acetonitrile) Pd (Ⅱ) bis (tetrafluoroborate)and (η3-allyl)Pd(Ⅱ)SbF6, in high conversion. These polymers showed high glass transitiontemperatures, high transparency and good solubility in common solvents.

关键词：降冰片烯羧酸酯钯催化剂降冰片烯聚合物催化合成

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Photonic structures in radiative cooling

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Light(Science & Applications) 2023年第7期12卷 1187-1215页

作者： Minjae Lee Gwansik Kim Yeongju Jung Kyung Rok pyun Jinwoo Lee Byung-Wook Kim Seung Hwan Ko Applied Nano and Thermal Science Lab Department of Mechanical EngineeringSeoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea Electronic Device Research Team Hyundai Motor Group37Cheoldobangmulgwan-roUiwang-siGyeonggi-do 16082South Korea E-drive Materials Research Team Hyundai Motor Group37Cheoldobangmulgwan-roUiwang-siGyeonggi-do 16082South Korea Department of Mechanical Robotics and Energy EngineeringDongguk University30 pildong-ro 1-gilJung-guSeoul 04620South Korea. Department of Civil Engineering and Engineering Mechanics Columbia UniversityNew YorkNY 10027USA. Institute of Advanced Machinery and Design(SNU-IAMD)/lnstitute of Engineering Research Seoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea

Radiative cooling is a passive cooling technology without any energy consumption,compared to conventional cooling technologies that require power sources and dump waste heat into the *** decades,many radiative cooling studies have been introduced but its applications are mostly restricted to nighttime use ***,the emergence of photonic technologies to achieves daytime radiative cooling overcome the performance *** example,broadband and selective emissions in mid-IR and high reflectance in the solar spectral range have already been *** review article discusses the fundamentals of thermodynamic heat transfer that motivates radiative *** photonic structures such as multilayer,periodical,random;derived from nature,and associated design procedures were thoroughly *** integration with new functionality significantly enhances the effciency of radiative cooling technologies such as colored,transparent,and switchable radiative cooling applications has been *** commercial applications such as reducing cooling loads in vehicles,increasing the power generation of solar cells,generating electricity,saving water,and personal thermal regulation are also ***,perspectives on radiative cooling and emerging issues with potential solution strategies are discussed.

关键词： radiative overcome transparent

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Predictability of polygenic risk score for progression to dementia and its interaction with APOEε4 in mild cognitive impairment

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Translational Neurodegeneration 2021年第3期10卷 412-420页

作者： Jung‑Min pyun Young Ho Park Keon‑Joo Lee SangYun Kim Andrew J.Saykin Kwangsik Nho Department of Neurology Uijeongbu Eulji Medical CenterEulji UniversityUijeongbuRepublic of Korea Department of Neurology Seoul National University Bundang Hospital and Seoul National University College of Medi‑cineSeongnamRepublic of Korea Department of Radiology and Imaging Sciences and the Indiana Alzheimer Disease CenterIndiana University School of MedicineIndianapolisINUSA Department of Medical and Molecular Genetics Indiana University School of MedicineIndianapolisINUSA Center for Computational Biology and Bioinformatics Indiana University School of MedicineIndianapolisINUSA.

Background:The combinatorial efect of multiple genetic factors calculated as a polygenic risk score(PRS)has been studied to predict disease progression to Alzheimer’s disease(AD)from mild cognitive impairment(MCI).Previous studies have investigated the performance of PRS in the prediction of disease progression to AD by including and excluding single nucleotide polymorphisms within the region surrounding the APOE *** studies may have missed the APOE genotype-specifc predictability of PRS for disease progression to ***:We analyzed 732 MCI from the Alzheimer’s Disease Neuroimaging Initiative cohort,including those who progressed to AD within 5 years post-baseline(n=270)and remained stable as MCI(n=462).The predictability of PRS including and excluding the APOE region(PRS_(+APOE) and PRS_(−APOE))on the conversion to AD and its interaction with the APOEε4 carrier status were assessed using Cox regression ***:PRS_(+APOE)(hazard ratio[HR]1.468,95%CI 1.335-1.615)and PRS_(−APOE)(HR 1.293,95%CI 1.157-1.445)were both associated with a signifcantly increased risk of MCI progression to *** interaction between PRS_(+APOE) and APOEε4 carrier status was signifcant with a P-value of *** association of PRSs with the progression risk was stronger in APOEε4 non-carriers(PRS_(+APOE):HR 1.710,95%CI 1.244-2.351;PRS_(−APOE):HR 1.429,95%CI 1.182-1.728)than in APOEε4 carriers(PRS_(+APOE):HR 1.167,95%CI 1.005-1.355;PRS_(−APOE):HR 1.172,95%CI 1.020-1.346).Conclusions:PRS could predict the conversion of MCI to dementia with a stronger association in APOEε4 noncarriers than APOEε4 *** indicates PRS as a potential genetic predictor particularly for MCI with no APOEε4 alleles.

关键词： Polygenic risk score Mild cognitive impairment Alzheimer’s disease Disease progression APOEε4

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Prolonged and highly efficient intracellular extraction of photosynthetic electrons from single algal cells by optimized nanoelectrode insertion

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Nano Research 2018年第1期11卷 397-409页

作者： Hyeonaug Hong Yong Jae Kim Myungjin Han Gu YOO Hyun Woo Song Youngcheol Chae Jae-Chul pyun Arthur R. Grossman WonHyoung Ryu Department of Mechanical Engineering Yonsei University Seou103722 Republic of Korea Yonsei Institute of Convergence Technology and school of In tegrated Technology Yonsei University Incheon 21983 Republic of Korea Department of Materials Science & Engineering Yonsei University Seou103722 Republic of Korea Department of Electrical & Electronic Engineering Yonsei University Seou103722 Republic of Korea Deportment of Plant Biology Carnegie Institution for Science Department of Biology Stanford University Stanford CA 94305 USA

Harvesting photosynthetic electrons （PEs） from plant or algal cells can be a highly efficient and environmentally friendly way of generating renewable energy. Recent work on nanoelectrode insertion into algal cells has demonstrated the possibility to directly extract PEs from living algal cells with high efficiencies. However, the instability of the inserted cells limits the practicality of this technology. Here, the impact of nanoelectrode insertion on intracellular extraction of PEs is characterized with the goal of stabilizing algal cells after nanoelectrode insertion. Using nanoelectrodes 〈 500 nm in diameter, algal cells remained stable for over one week after insertion and continued to provide PEs through direct extraction by the inserted nanoelectrodes. After nanoelectrode insertion, a photosynthetic current density of 6 ***-2, which is several fold higher than the current densities attained using approaches based on isolated thylakoid membranes or photosystem I complexes, was observed in the dark and during illumination at various light intensities.

关键词： bio-solar energy photosynthetic electrons algal cells nanoelectrode cell insertion

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国际化网络协作学习的教学效果——学生视角的质性研究

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高教探索 2021年第10期 10-15,21页

作者：冯瑞玲 Kyunghee pyun 天津师范大学外国语学院天津300387 清华大学外文系纽约时装设计学院

国际化网络协作学习(Collaborative Online International Learning,COIL)是一种跨文化虚拟交流模式,它融合了互联网技术、项目式学习和小组协作。本研究对天津某高校大学英语课程与纽约某高校日本艺术与文明课程的COIL项目进行跟踪调研... 详细信息

国际化网络协作学习(Collaborative Online International Learning,COIL)是一种跨文化虚拟交流模式,它融合了互联网技术、项目式学习和小组协作。本研究对天津某高校大学英语课程与纽约某高校日本艺术与文明课程的COIL项目进行跟踪调研,通过访谈和反思日志收集数据,从中方学生的增能情况、对COIL的态度及建议等角度探讨COIL的人才培养效果。数据分析发现COIL可实现多维增能效果,如提升中方学生的语言技能、非语言技能、自信心和主动性等;中方学生对COIL的态度以积极为主,消极为辅,但也面临着语言、网络工具、数字鸿沟、时差、文化差异、COIL周期、教师指导等方面的困难,有待于从个性化、规范化、常态化的角度完善教学设计,提升学生的学习效果。

关键词：国际化网络协作学习国际化人才培养应用效果

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Luminescent Properties of Gd_(3)PO_(7):Eu in UV/VUV Region

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Chinese Physics Letters 2001年第5期18卷 690-691页

作者： ZENG Xiao-Qing HONG Guang-Yan YOU Hong-Peng WU Xue-Yan KIM Chang-Hong pyun Chong-Hong YU Byung-Yong BAE Hyun-Sook PARK Cheal-Hee KWON Il-Eok Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022 Solid State Chemistry Labortory Korea Institute of Science and TechnologyP.O.Box 131CheongryangSeoul 130-650Korea

The luminescent properties of Gd_(3)PO_(7):Eu were investigated in UV and VUV *** phosphor has so strong emissions around 618.5 nm under UV excitation,especially around 209\,nm,so that it has a better colour saturation than that of Y_(2)O_(3):*** would be a new potential red phosphor for lamp and other applications with UV-excitation source or even for displaying *** the VUV excitation spectrum of Eu^(3+)emissions,energy absorptions by Gd^(3+),Gd-O and PO_(4)^(3-) were observed,on which it can be inferred that there are three kinds of energy transferring processes to Eu^(3+)*** energy absorptions of Gd^(3+),Gd-O and PO_(4)^(3-) are induced by 4f→4f transitions,band-gap transition of Gd_(3)PO_(7) and intramolecular(2t_(2)→2a,3t_(2))transition,*** energy transfer efficiency of the PO_(4)^(3-) intramolecular transition is lower compared with that of the band-gap transition(Gd-O).

关键词： excitation intramolecular transition

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Wavepath tomography using a monochromatic frequency-domain wave equation

Wavepath tomography using a monochromatic frequency-domain w...

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中国科学院地质与地球物理研究所2006学术年会

作者： Sukjoon pyun Changsoo Shin Seoul National University School of CivilUrban and Geosystem EngineeringSeoul151-742Korea

Traveltime tomographys requires an algorithm for efficient and accurate computation of traveltimes and their paths,i.e.,traveltime derivatives with respect to the subsurface parameters. Conventional ray-theoretical traveltime inversion algorithms calculate the traveltime and the corresponding raypaths using raytracing methods,which are all based on the assumption of infinte frequency,but the field seismic waves are *** conventional raytracing theory, wave-equation tomography can account for the band-limited charactereistics of seismic waves. Therefore,in this paper we compute traveltimes and their wavepaths by solving the suppressed monochromatic frequency-domain wave *** first-arrival traveltime is obtained by taking the natural logarithm of a strongly suppressed monochromatic wave field,and the wavepath is obtained by taking the imaginary part of the partial derivative wavefield,where the wavefield partial derivative is efficiently calculated by the virtual source principle and the reciprocity *** results show that the traveltime calculated by the wave equation is much smoother than the results show that the traveltime calculated by the wave equation is much smoother than the ary-theoretical traveltime,and the wavepath has different sensitivity and width for different velocity *** to the resolution analysis of ray density,the superposition of all the wavepaths can also give the resolution image. In our inversion algorithm,the objective function is built into the residual between the first-arrival traveltime in the field data and that in the forward-modeled *** the computation of the Hessian matrix is expensive,we regularized the steepest descent direction by the diagonal approximation of the Hessian ***,we demonstrate our method using high-velocity and low-velocity anomaly medels,respectively,And the results show that our tomography algorithm can invert the high-velocity anomaly and low-velocity ano

关键词： wavepath tomography frequency-domain modeling frist-arrival traveltime logarithm wavefield steep descent

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Machine-learned wearable sensors for real-time hand-motion recognition: toward practical applications

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National Science Review 2024年第2期11卷 231-263页

作者： Kyung Rok pyun Kangkyu Kwon Myung Jin Yoo Kyun Kyu Kim Dohyeon Gong Woon-Hong Yeo Seungyong Han Seung Hwan Ko Department of Mechanical Engineering Seoul National University IEN Center for Human-Centric Interfaces and Engineering Institute for Electronics and NanotechnologyGeorgia Institute of Technology School of Electrical and Computer Engineering Georgia Institute of Technology Department of Chemical Engineering Stanford University Department of Mechanical Engineering Ajou University George W.Woodruff School of Mechanical Engineering Georgia Institute of Technology Institute of Advanced Machinery and Design(SNU-IAMD) Seoul National University

Soft electromechanical sensors have led to a new paradigm of electronic devices for novel motion-based wearable applications in our daily lives. However, the vast amount of random and unidentified signals generated by complex body motions has hindered the precise recognition and practical application of this technology. Recent advancements in artificial-intelligence technology have enabled significant strides in extracting features from massive and intricate data sets, thereby presenting a breakthrough in utilizing wearable sensors for practical applications. Beyond traditional machine-learning techniques for classifying simple gestures, advanced machine-learning algorithms have been developed to handle more complex and nuanced motion-based tasks with restricted training data sets. Machine-learning techniques have improved the ability to perceive, and thus machine-learned wearable soft sensors have enabled accurate and rapid human-gesture recognition, providing real-time feedback to users. This forms a crucial component of future wearable electronics, contributing to a robust human–machine interface. In this review, we provide a comprehensive summary covering materials, structures and machine-learning algorithms for hand-gesture recognition and possible practical applications through machine-learned wearable electromechanical sensors.

关键词： wearable sensor soft electronics artificial intelligence machine learning human–machine interfaces gesture recognition

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Cirsiumjaponicum mitigates allergic nasal inflammation by regulating NRF2-mediated mucin production:Systematic transcriptome and molecular docking analyses

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药物分析学报（英文版） 2024年第10期14卷 1527-1530页

作者： Bo-Jeong pyun Su-Jin Baek Kyuhyung Jo Ik Soo Lee Musun Park Hye Jin Kim Joo Young Lee Susanna Choi Yun Hee Kim Taesoo Kim KM Convergence Research Division Korea Institute of Oriental Medicine1672 Yuseong-daero Yuseong-guDaejeon 34054Republic of Korea KM Data Division Korea Institute of Oriental Medicine1672 Yuseong-daeroYuseong-guDaejeon 34054Republic of Korea

Allergic rhinitis(AR)is an immunoglobulin(Ig)E-mediated allergic disease frequently recurring following seasonal changes and significantly impacting quality of life[1].Worsening AR symptoms can lead to more severe *** japonicum(CSJ,milk thistle)is an edible and medicinal plant with anti-oxidant,anti-inflammatory,and hepatoprotective properties;however,its effects and mechanisms of action in AR remain ***,we investigated the CSJ targets in AR and the under-lying mechanisms in an ovalbumin(OVA)-induced AR mouse model.

关键词： production docking molecular nicu mucin nasal apon allergic analyses inflammation

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