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Migration routes and differences in migration strategies of Whooper Swans between spring and autumn

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Avian Research 2023年第3期14卷 345-353页

作者： Ji-yeon Lee Hyung-kyu Nam Jin-Young Park Seung-Gu Kang Nyambayar Batbayar Dong-Won Kim Jae-Woong hwang Otgonbayar Tsend Tseveenmyadag Natsagdorj Jugdernamjil Nergui Tuvshintugs Sukhbaatar Wee-Haeng Hur Jeong-Chil Yoo The Korea Institute of Ornithology and Department of Biology Graduate SchoolKyung Hee University26 Kyungheedae-roDongdaemun-guSeoul02447Republic of Korea National Institute of Biological Resources 42 Hwangyeong-roSeo-guIncheon22689Republic of Korea Endangered Species Research Center National Institute of EcologyYeongyang36351Republic of Korea Wildlife Sciences and Conservation Center of Mongolia Union BuildingB-701UNESCO str.Ulaanbaatar14210Mongolia

Long-distance migratory birds travel more rapidly in spring than in autumn,as they face temporal breeding ***,several species travel slower in spring owing to environmental influences,such as food availability and wind *** trackers were attached to 17 Whooper Swans(Cygnus cygnus) inhabiting northeastern Mongolia,to determine their migration routes and stopover sites in spring and *** between spring and autumn migrations,migration-influencing parameters,and the effect of spring stopover site temperatures were *** swans completed perfect tours between their wintering and breeding sites,and these data were used for *** migration lasted 57 days,with 49.2 days spent at 3.7 stopover *** migration lasted 21.5 days,with 17.5 days spent at 1.0 stopover ***,the swans traveled more rapidly in autumn than in *** distance,number of stopovers,migration speed,and straightness were important migration determinants in both spring and *** distance,stopover duration,number of stopovers,daily travel speed,travel duration,and migration speed differed significantly between spring and *** spring migration,the temperature at the current stopover sites and that at the future stopover sites displayed significant variations(t=1585.8,df=631.6,p <0.001).These findings are critical for the conservation and management of Whooper Swans and their key habitats in East Asian regions,and the data are anticipated to make a particularly significant contribution toward developing detailed management plans for the conservation of their key habitats.

关键词： Key stopover sites Migration characteristics Migration route Migration strategy Tracking Whooper Swan

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Dimensionality-driven metal to Mott insulator transition in two-dimensional 1T-TaSe2

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National Science Review 2024年第3期11卷 108-118页

作者： Ning Tian Zhe Huang Bo Gyu Jang Shuaifei Guo Ya-Jun Yan Jingjing Gao Yijun Yu Jinwoong hwang Cenyao Tang Meixiao Wang Xuan Luo Yu Ping Sun Zhongkai Liu Dong-Lai Feng Xianhui Chen Sung-Kwan Mo Minjae Kim Young-Woo Son Dawei Shen Wei Ruan Yuanbo Zhang State Key Laboratory of Surface Physics New Cornerstone Science Laboratory and Department of PhysicsFudan University Shanghai Qi Zhi Institute Shanghai Research Center for Quantum Sciences Institute for Nanoelectronic Devices and Quantum Computing Fudan University Zhangjiang Fudan International Innovation Center Fudan University State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of Sciences School of Physical Science and Technology ShanghaiTech University Korea Institute for Advanced Study School of Emerging Technology and Department of Physics University of Science and Technology of China Advanced Light Source Lawrence Berkeley National Laboratory ShanghaiTech Laboratory for Topological Physics Key Laboratory of Materials Physics Institute of Solid State Physics Hefei Institutes of Physical ScienceChinese Academy of Sciences High Magnetic Field Laboratory Hefei Institutes of Physical Science Chinese Academy of Sciences Collaborative Innovation Centre of Advanced Microstructures Nanjing University Department of Physics University of Science and Technology of China and Key Laboratory of Strongly Coupled Quantum Matter Physics Chinese Academy of Sciences National Synchrotron Radiation Laboratory University of Science and Technology of China

Two-dimensional materials represent a major frontier for research into exotic many-body quantum phenomena. In the extreme two-dimensional limit, electron-electron interaction often dominates over other electronic energy scales, leading to strongly correlated effects such as quantum spin liquid and unconventional *** dominance is conventionally attributed to the lack of electron screening in the third dimension. Here, we discover an intriguing metal to Mott insulator transition in 1T-TaSe2that defies conventional wisdom. Specifically, we find that dimensionality crossover, instead of reduced screening, drives the transition in atomically thin 1T-TaSe2. A dispersive band crossing the Fermi level is found to be responsible for the bulk metallicity in the material. Reducing the dimensionality,however, effectively quenches the kinetic energy of these initially itinerant electrons, and drives the material into a Mott insulating *** dimensionality-driven metal to Mott insulator transition resolves the long-standing dichotomy between metallic bulk and insulating surface of 1T-TaSe2. Our work further reveals a new pathway for modulating two-dimensional materials that enables exploring strongly correlated systems across uncharted parameter space.

关键词： two-dimensional materials 1T-TaSe2 dimensionality crossover metal to Mott insulator transition

Long-lasting,reinforced electrical networking in a high-loading Li_(2)S cathode for high-performance lithium–sulfur batteries

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Carbon Energy 2023年第8期5卷 1-14页

作者： Hun Kim Kyeong-Jun Min Sangin Bang Jang-yeon hwang Jung Ho Kim Chong SYoon Yang-Kook Sun Department of Energy Engineering Hanyang UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Chonnam National UniversityGwangjuRepublic of Korea Institute for Superconducting&Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)University of WollongongNew South WalesNorth WollongongAustralia Department of Materials Science and Engineering Hanyang UniversitySeoulRepublic of Korea

Realizing a lithium sulfide(Li_(2)S)cathode with both high energy density and a long lifespan requires an innovative cathode design that maximizes electrochemical performance and resists electrode ***,a high-loading Li_(2)S-based cathode with micrometric Li_(2)S particles composed of two-dimensional graphene(Gr)and one-dimensional carbon nanotubes(CNTs)in a compact geometry is developed,and the role of CNTs in stable cycling of high-capacity Li–S batteries is *** a dimensionally combined carbon matrix,CNTs embedded within the Gr sheets create robust and sustainable electron diffusion pathways while suppressing the passivation of the active carbon *** a unique point,during the first charging process,the proposed cathode is fully activated through the direct conversion of Li_(2)S into S_(8) without inducing lithium polysulfide *** direct conversion of Li_(2)S into S_(8) in the composite cathode is ubiquitously investigated using the combined study of in situ Raman spectroscopy,in situ optical microscopy,and cryogenic transmission electron *** composite cathode demonstrates unprecedented electrochemical properties even with a high Li_(2)S loading of 10 mg cm^(–2);in particular,the practical and safe Li–S full cell coupled with a graphite anode shows ultra-long-term cycling stability over 800 cycles.

关键词： carbon nanotubes electrical network high energy high loading Li_(2)S cathode lithium-sulfur batteries

Efficient Gauss-Seidel Precoding with Parallel Calculation in Massive MIMO Systems

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Computers, Materials & Continua 2022年第1期70卷 491-504页

作者： Hyun-Sun hwang Jae-Hyun Ro Chan-Yeob Park Young-Hwan You Hyoung-kyu Song Department of Information and Communication Engineering Convergence Engineering for Intelligent DroneSejong UniversitySeoul05006Korea Department of Convergence Engineering for Intelligent Drone Sejong UniversitySeoul05006Korea Department of Computer Engineering Convergence Engineering for Intelligent DroneSejong UniversitySeoul05006Korea

A number of requirements for 5G mobile communication are satisfied by adopting multiple input multiple output(MIMO)*** inter user interference(IUI)which is an inevitable problem in MIMO systems becomes controllable when the precoding scheme is *** this paper,the horizontal Gauss-Seidel(HGS)method is proposed as precoding scheme in massive MIMO *** massive MIMO systems,the exact inversion of channel matrix is impractical due to the severe computational ***,the conventionalGauss-Seidel(GS)method is used to approximate the inversion of channel *** GS has good performance by using previous calculation results as ***,the required time for obtaining the precoding symbols is too long due to the sequential process of ***,the HGS with parallel calculation is proposed in this paper to reduce the required *** rows of channel matrix are eliminated for parallel calculation *** addition,HGSuses the ordered channelmatrix to prevent performance degradation which is occurred by parallel *** HGS with proper number of parallelly computed symbols has better performance and reduced required time compared to the traditional GS.

关键词： Massive MIMO GS matrix inversion linear precoding

Lubricant skin on diverse biomaterials with complex shapes via polydopamine-mediated surface functionalization for biomedical applications

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Bioactive Materials 2023年第7期25卷 555-568页

作者： Kijun Park Seunghoi Kim Yejin Jo Jae Park Inwoo Kim Sooyoung hwang yeontaek Lee So yeon Kim Jungmok Seo School of Electronic and Electronic Engineering Yonsei UniversitySeoul03722Republic of Korea Center for Biomaterials Biomedical Research InstituteKorea Institute of Science and TechnologiesSeoul02792Republic of Korea Center for Theragnosis Biomedical Research InstituteKorea Institute of Science and TechnologiesSeoul02792Republic of Korea

Implantable biomedical devices require an anti-biofouling,mechanically robust,low friction surface for a prolonged lifespan and improved ***,there exist no methods that could provide uniform and effective coatings for medical devices with complex shapes and materials to prevent immune-related side effects and thrombosis when they encounter biological ***,we report a lubricant skin(L-skin),a coating method based on the application of thin layers of bio-adhesive and lubricant-swellable perfluoropolymer that impart anti-biofouling,frictionless,robust,and heat-mediated self-healing *** demonstrate biocompatible,mechanically robust,and sterilization-safe L-skin in applications of bioprinting,microfluidics,catheter,and long and narrow medical *** envision that diverse applications of L-skin improve device longevity,as well as anti-biofouling attributes in biomedical devices with complex shapes and material compositions.

关键词： Anti-biofouling Lubricant-infused Biomedical applications Biomaterials Biointerface

Does the advantage of transcutaneous oximetry measurements in diabetic foot ulcer apply equally to free flap reconstruction?

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World Journal of Clinical Cases 2023年第31期11卷 7570-7582页

作者： Da Woon Lee Yong Seon hwang Je yeon Byeon Jun Hyuk Kim Hwan Jun Choi Department of Plastic and Reconstructive Surgery College of MedicineSoonchunhyang UniversityCheonan-si 31151South Korea

BACKGROUND Transcutaneous oxygen pressure(TcpO2)is a precise method for determining oxygen perfusion in wounded *** device uses either electrochemical or optical *** To evaluate the usefulness of TcpO2 measurements on free flaps(FFs)in diabetic foot ulcers(DFUs).METHODS TcpO2 was measured in 17 patients with DFUs who underwent anterolateral thigh(ALT)-FF surgery and compared with 30 patients with DFU without FF *** Significant differences were observed in the ankle-brachial index;duration of diabetes;and haemoglobin,creatinine,and C-reactive protein levels between the two ***2 values were similar between two groups except on postoperative days 30 and 60 when the values in the ALT-FF group remained50 *** Even if the flap is clinically stable,sympathectomy due to adventitia stripping during anastomosis and arteriovenous shunt progression due to diabetic polyneuropathy could lead to low TcpO2 values in the ALT-FF owing to its thick fat tissues,which is supported by the slow recovery of the sympathetic tone following ***,TcpO2 measurements in patients with DFU who underwent FF reconstruction may be less accurate than in those who did not.

关键词： Arteriovenous shunt Surgical Diabetic neuropathies Free tissue flaps Sympathectomy Blood gas monitoring Transcutaneous Diabetic angiopathies

以包容的空间塑造面向未来的潜力2024密斯凡德罗奖

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艺术与设计 2024年第4期 120-123页

作者：黄巍锋不详

作为欧盟重要的建筑奖项,自1988年始的密斯凡德罗奖(Mies van der Rohe Awards)上个月公布了今年的获奖建筑项目。作为表彰欧洲当代优秀建筑的大奖,今年的密斯凡德罗奖建筑奖(Architecture Prize)获奖项目德国布伦瑞克工业大学研究馆(St... 详细信息

作为欧盟重要的建筑奖项,自1988年始的密斯凡德罗奖(Mies van der Rohe Awards)上个月公布了今年的获奖建筑项目。作为表彰欧洲当代优秀建筑的大奖,今年的密斯凡德罗奖建筑奖(Architecture Prize)获奖项目德国布伦瑞克工业大学研究馆(Study Pavilion on the campus of the Technical University of Braunschweig,Germany)和新兴建筑奖(Emerging Architecture Prize)获奖项目巴塞罗那加夫列尔·加西亚·马尔克斯图书馆(Gabriel García Márquez Library in Barcelona),分别由常驻柏林的建筑师古斯塔夫·杜辛(Gustav Düsing)、马克斯·哈克(Max Hacke),以及创建于马德里的SUMA建筑事务所(SUMA Arquitectura)所建造。欧盟委员会和密斯凡德罗基金会的官员称赞获奖建筑“体现了新欧洲包豪斯的原则”,并且强调了“促进包容的重要性”。

关键词：密斯凡德罗建筑事务所获奖项目古斯塔夫空间塑造建筑奖

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镍闪速熔炼过程数值仿真

中南大学学报（自然科学版） 2024年第3期55卷 871-881页

作者：陈爱良王子彪刘瑶何利华张希军刘福林卢苏君 hwang Jiann-Yang 孙丰龙中南大学冶金与环境学院湖南长沙410083 镍钴资源综合利用国家重点实验室甘肃金昌737100 Michigan Technological University HoughtonMI 49931USA

采用数值模拟软件对国内某大型镍厂闪速炉内气相的速度、温度、浓度及不同粒径颗粒的速度和温度分布特性进行研究。研究结果表明:通过COMSOL软件模拟后,喷嘴喷入的混合气流入炉后发生膨胀,在闪速炉内形成涡流,并会向反应塔上部运动发生... 详细信息

采用数值模拟软件对国内某大型镍厂闪速炉内气相的速度、温度、浓度及不同粒径颗粒的速度和温度分布特性进行研究。研究结果表明:通过COMSOL软件模拟后,喷嘴喷入的混合气流入炉后发生膨胀,在闪速炉内形成涡流,并会向反应塔上部运动发生回流;氧化反应主要发生在离反应塔中心1.2 m区域内,在距塔顶5.59 m处氧化反应基本完成,且氧气未被完全消耗,沉淀池出口氧气体积分数为7.70%;喷嘴下方和反应塔中下部存在局部高温区域,反应塔中上部区域出现低温区域;小粒径混合物料颗粒与大粒径混合物料颗粒相比受气体影响程度较大,达到的最大速度更大,且由于着火点低,温度上升较快,控制混合物料颗粒粒径在60~80μm之间熔炼反应效果较好。

关键词：镍闪速熔炼数值模拟分布特性反应塔

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Strain hardening rate dependency of deformation shape,strain distribution,and contact pressure during wire flat rolling

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Journal of Iron and Steel Research(International) 2023年第3期30卷 475-486页

作者： Joong-Ki hwang School of Mechatronics Engineering Korea University of Technology and EducationCheonan 31253Republic of Korea

The effect of the strain hardening exponent(n)of a material on the changes in shape,strain inhomogeneity,and contact pressure was investigated during wire flat rolling to understand its effect on the deformation behavior of a flat-rolled wire and to determine the optimal working conditions with *** deformation behaviors of wires with various n values were systematically compared using finite element *** shape of the deformed wire was found to depend on the n value of the *** the contact width and lateral spreading of the wire decrease with increasing n,resulting in a large reduction in area with the n *** strain homogeneity of the wire increases with the n value of the *** improvement in the strain homogeneity with the n value is attributable to two factors:a lower strain concentration in the central region and a higher overall elongation as n *** addition,the average effective strain of the wire cross section decreases with the n value of a material during wire flat *** contact pressure distribution on the surface of the wire differs significantly depending on the n *** materials with a low n value,the contact pressure exhibits a higher value at the entry and edge zones of the contact *** contrast,materials with high n values exhibit a higher contact pressure at the exit *** behavior can be explained by the strain hardening behavior of the material during wire flat rolling.

关键词： Strain hardening exponent Wire flat rolling Shape change Strain inhomogeneity Contact pressure