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Review on observational studies of western tropical Pacific Ocean circulation and climate

Journal of Oceanology and Limnology 2020年第4期38卷 906-929页

作者： HU Dunxin WANG Fan SPRINTALL Janet WU Lixin RISER Stephen CRAVATTE Sophie GORDON Arnold ZHANG Linlin CHEN Dake ZHOU Hui ANDO Kentaro WANG Jianing LEE Jae-Hak HU Shijian WANG Jing ZHANG Dongxiao FENG Junqiao LIU Lingling VILLANOY Cesar KALUWIN Chalapan QU Tangdong MA Yixin Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Scripps Institution of Oceanography University of CaliforniaSan DiegoLa JollaCalifornia 92093USA Ocean University of China Qingdao 266100China School of Oceanography University of WashingtonSeattle WA 98195-7940USA LEGOS Universitéde ToulouseIRDCNESCNRSUPSToulouse 31520France Lamont‐Doherty Earth Observatory Columbia UniversityPalisadesNew York 10027USA State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural Resources(MNR)Hangzhou 310012China Research and Development Center for Global Change Japan Agency for Marine‐Earth Science and TechnologyYokosuka 237-0061Japan Ocean Circulation and Climate Research Korea Institute of Ocean Science and TechnologyBusan 49111Korea Joint Institute for the Study of the Atmosphere and Ocean University of WashingtonSeattleWashington 98195USA Marine Science Institute University of the PhilippinesDilimanQuezon City 1101Philippines School of Natural and Physical Sciences University of Papua New GuineaPortmoresby 134Papua New Guinea Joint Institute for Regional Earth System Sciences and Engineering University of CaliforniaLos Angeles CA 90095USA

The Western Tropical Pacific(WTP) Ocean holds the largest area of warm water(>28℃) in the world ocean referred to as the Western Pacific Warm Pool(WPWP),which modulates the regional and global climate through strong atmospheric convection and its *** WTP is unique in terms of its complex 3-D ocean circulation system and intensive multiscale variability,making it crucial in the water and energy cycle of the global *** advances have been made in understanding the complexity of the WTP ocean circulation and associated climate impact by the international scientific community since the 1960 s through field *** this study,we review the evolving insight to the 3-D structure and multi-scale variability of the ocean circulation in the WTP and their climatic impacts based on in-situ ocean observations in the past decades,with emphasis on the achievements since *** challenges and open que stions remaining are reviewed as well as future plan for international study of the WTP ocean circulation and climate.

关键词： Western Tropical Pacific(WTP) ocean circulation climate observation

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Underwater sound focusing via quasi-three-dimensional gradient-index lens

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Physical Review Applied 2025年第6期23卷 064057-064057页

作者： Seong-Jin Lee Jung-Woo Kim Sang-Hoon Kim Dongwoo Lee Beomseok Oh Junsuk Rho Gunn Hwang Aerodynamics and Performance Research Team Korea Aerospace Research Institute Daejeon 34113 Republic of Korea Department of Aerospace System Engineering University of Science and Technology Daejeon 34113 Republic of Korea Department of Naval Architecture Republic of Korea Naval Academy Changwon 51698 Republic of Korea Division of Marine Engineering Mokpo National Maritime University Mokpo 58628 Republic of Korea Naval Ship Performance R&D Team Defense Technology R&D Center Hanwha Ocean Geoje 53302 Republic of Korea Department of Mechanical Engineering Pohang University of Science and Technology Pohang 37673 Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology Pohang 37673 Republic of Korea Department of Electrical Engineering Pohang University of Science and Technology Pohang 37673 Republic of Korea POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang 37673 Republic of Korea Department of Drone and Mechanical Engineering Konyang University Nonsan 32992 Republic of Korea

Gradient-index lenses, enabled by meta-atoms, have demonstrated effective focusing capabilities in both airborne and submerged environments. However, the current focusing capabilities remain constrained primarily to two-dimensional systems. Here we introduce a quasi-3D gradient-index lens designed for underwater sound focusing. This lens, characterized by a simple yet effective design, features an additional degree of freedom along the axial direction, enabling controlled wave refraction in longitudinal and lateral directions. To achieve this, eigenfrequency analysis and a scattering parameter retrieval method are used to calculate the band structure and characterize the effective material properties. Numerical simulations and experimental validation confirm the efficacy of the lens in focusing underwater sound and highlight its potential for high-resolution sensing, advanced biomedical imaging, and efficient energy harvesting.

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Stem Cell-Derived Extracellular Vesicles in Skin Antiaging Treatments

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ACS nano 2025年第25期19卷 2025 Jun 17页

作者： Ji Yeong Park Se Young Jung Donghyeon Yoo Sihun Lee Dabin Go Van Dat Bui Won-Kyo Jung Dong Gil You Jae Hyung Park Wooram Um Department of Biotechnology College of Fisheries Science Pukyong National University Busan 48513 Republic of Korea. School of Chemical Engineering College of Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea. Vinmec Research Institute of Stem Cell and Gene Technology College of Health Sciences VinUniversity Vinhomes Ocean Park Gia Lam District Hanoi 1310 Vietnam. Marine Integrated Biomedical Technology Center The National Key Research Institutes in Universities Pukyong National University Busan 48513 Republic of Korea. Department of Chemical Engineering and Biotechnology Tech University of Korea Siheung 15073 Republic of Korea.

As the median age of the global population rises and the demand for aesthetic enhancement increases, interest in antiaging skin technologies has been growing significantly. This review first addresses the molecular mechanisms underlying skin aging, followed by an overview of traditional antiaging approaches and their benefits and limitations. Furthermore, it emphasizes the potential of mesenchymal stem cell-derived extracellular vesicles (MSC-EVs) as promising alternatives to address the shortcomings of conventional strategies. This article highlights the antiaging effects and therapeutic mechanisms of MSC-EVs in the skin microenvironment and identifies promising targets for skin antiaging interventions based on the functional properties of MSC-EVs. Finally, this review introduces the recent advances and future directions for MSC-EV-based antiaging strategies.

关键词： antiaging therapies exosomes extracellular vesicles regenerative medicines regenerative therapies skin aesthetics skin aging skin rejuvenation stem cells

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Plasmon induced field amplification for enhancing photoelectrochemical oxidative valorization

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Applied Catalysis B: Environment and Energy 2025年 378卷

作者： Seung Hun Roh Yuankai Li Jun Young Kim Won Tae Hong Hyungu Han Chan-Woo Jung Young Moon Choi Gang Min Noh Yoon Seo Jang Ki Hyun Kim Jun-Hyuk Choi Dae-Geun Choi Sae Byeok Jo Jong Hyeok Park Chan-Hwa Chung Seok Joon Kwon Ji-Hee Kim Jung Kyu Kim School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Department of Biomedical-Chemical Engineering Catholic University of Korea Bucheon 14662 Republic of Korea Department of Energy Science Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei University Seoul 03722 Republic of Korea School of Pharmacy Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Nano Lithography & Manufacturing Research Center Korea Institute of Machinery & Materials Daejeon 34103 Republic of Korea SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea SKKU Institute of Energy Science and Technology (SIEST) Department of Semiconductor Convergence Engineering and Department of Quantum Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Department of Physics Pusan National University Busan 46241 Republic of Korea SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea

Photoelectrochemical (PEC) oxidative reaction provides promising strategies to valorization of massively produced low-value waste resources, such as glycerol. However, the PEC oxidative valorization of glycerol to formic acid (FA) is limited by insufficient conversion rate and challenge in selectivity control, attributed to the multistep reaction pathway of the glycerol oxidation reaction (GOR). Herein, we demonstrate the plasmon-induced resonant energy transfer driven amplification of E-field into the n-type metal oxide photoanode by introducing a hierarchically ordered array of Au nanoparticles cluster ( c -Au) for boosting PEC GOR. The nanopositioned c -Au array effectively amplified the E-field within the BiVO 4 -based photoanode (BVO) by unique plasmonic coupling, realized by inter- and intra-cluster interactions. The amplified E-field notably prolongs the charge carrier lifetime, suppresses the direct charge recombination, and ameliorates the charge separation, inducing the enhanced the surface photovoltage. Consequently, the designed c -Au shows significantly promoted PEC GOR, effectively achieving the ∼3-fold higher conversion rate of glycerol to FA and significantly improving its Faradaic efficiency from 18.8 % for BVO to 27.8 %. These improvements are attributed to the promoting GOR over the multistep pathway by c -Au while suppressing the competing water oxidation reaction. Our report can be extended for manipulating PEC oxidative reactions toward targeting expandable productions.

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Clustering and power allocation for UAV-assisted NOMA-VLC systems: A swarm intelligence approach

arXiv

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arXiv 2020年

作者： Pham, Quoc-Viet Dao, Nhu-Ngoc Huynh-The, Thien Zhao, Jun Hwang, Won-Joo Research Institute of Computer Information and Communication Pusan National University Busan46241 Korea Republic of Department of Computer Science and Engineering Sejong University Seoul05006 Korea Republic of ICT Convergence Research Center Kumoh National Institute of Technology Gyeongsangbuk-do39177 Korea Republic of School of Computer Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore Department of Biomedical Convergence Engineering Pusan National University Busan46241 Korea Republic of

Integrating unmanned aerial vehicles (UAV) to nonorthogonal multiple access (NOMA) visible light communications (VLC) exposes many potentials over VLC and NOMA-VLC systems. In this circumstance, user grouping is of importance to reduce the NOMA decoding complexity when the number of users is large;however, this issue has not been considered in the existing study. In this paper, we aim to maximize the weighted sum-rate of all the users by jointly optimizing UAV placement, user grouping, and power allocation in downlink NOMA-VLC systems. We first consider an efficient user clustering strategy, then apply a swarm intelligence approach, namely Harris Hawk Optimization (HHO), to solve the joint UAV placement and power allocation problem. Simulation results show outperformance of the proposed algorithm in comparison with four alternatives: OMA, NOMA without pairing, NOMA-VLC with fixed UAV placement, and random user clustering. Copyright © 2020, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Corrigendum to "Repurposing chitin-rich seafood waste for Warm-water fish farming" [Heliyon 9 (7), (July 2023) Article e18197]

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Heliyon 2023年第8期9卷 e18873页

作者： Renuka Basawa Suhani Kabra Dnyanada Anil Khile Rahil Ummar Faruk Abbu Serin Joby Parekkadan Naomi Ann Thomas Se Kwon Kim Ritu Raval Department of Biotechnology Manipal Institute of Technology (MIT) Manipal Academy of Higher Education (MAHE) Manipal 576104 Karnataka India. Manipal Biomachines Manipal Institute of Technology (MIT) Manipal Academy of Higher Education (MAHE) Manipal 576104 Karnataka India. Department of Marine Science and Convergence Engineering College of Science and Technology Hanyang University Erica 55 Hanyangdae-ro Sangnol-gu Ansan-si 11558 Gyeonggi-do Republic of Korea.

[This corrects the article DOI: 10.1016/***.2023.e18197.].

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Intelligent radio signal processing: A survey

arXiv

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arXiv 2020年

作者： Pham, Quoc-Viet Nguyen, Nhan Thanh Huynh-The, Thien Le, Long Bao Lee, Kyungchun Hwang, Won-Joo The Korean Southeast Center for the 4th Industrial Revolution Leader Education Pusan National University Busan46241 Korea Republic of The Department of Electrical and Information Engineering Seoul National University of Science and Technology 01811 Korea Republic of The ICT Convergence Research Center Kumoh National Institute of Technology Gyeongsangbuk-do39177 Korea Republic of The INRS University of Quebec MontrealQC Canada The Department of Biomedical Convergence Engineering Pusan National University Yangsan50612 Korea Republic of

Intelligent signal processing for wireless communications is a vital task in modern wireless systems, but it faces new challenges because of network heterogeneity, diverse service requirements, a massive number of connections, and various radio characteristics. Owing to recent advancements in big data and computing technologies, artificial intelligence (AI) has become a useful tool for radio signal processing and has enabled the realization of intelligent radio signal processing. This survey covers four intelligent signal processing topics for the wireless physical layer, including modulation classification, signal detection, beamforming, and channel estimation. In particular, each theme is presented in a dedicated section, starting with the most fundamental principles, followed by a review of up-to-date studies and a summary. To provide the necessary background, we first present a brief overview of AI techniques such as machine learning, deep learning, and federated learning. Finally, we highlight a number of research challenges and future directions in the area of intelligent radio signal processing. We expect this survey to be a good source of information for anyone interested in intelligent radio signal processing, and the perspectives we provide therein will stimulate many more novel ideas and contributions in the future. Copyright © 2020, The Authors. All rights reserved.

关键词： Deep learning

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Basal texture formation behavior of M1 magnesium alloy during high-temperature compression deformation 7

Basal texture formation behavior of M1 magnesium alloy durin...

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7th International Conference on Recrystallization and Grain Growth, ReX and GG 2019

作者： Park, M. Kim, K. Tokyo Institute of Technology 4259 nagatsuta-cho Yokohama Midori-ku Kanagawa226-8503 Japan Department of Metallurgical Engineering Pukyong National University 45 Yongso-ro Busan Nam-gu48513 Korea Republic of Marine Convergence Design Co-work Pukyong National University 45 Yongso-ro Busan Nam-gu48513 Korea Republic of

Understanding the formation behavior of basal texture is important for improving formability. Many researchers found that deformation condition was an important factor in order to texture control on AZ system magnesium alloy. In case of M1 magnesium alloy has been investigated in texture formation resulting from grain size manipulation by precipitation, but there seems no studies on the texture development during high temperature on M1 magnesium alloy by deformation condition. In this study, microstructure evolution and texture formation behavior is investigated under various deformation conditions in M1 magnesium alloy. In order to make the same initial conditions, M1 magnesium ingot was rolled at 673K with a rolling reduction of 30%. Uniaxial compression test specimens were machined in such a way that the compression plane was parallel to the rolling plane, and subsequently annealed at 823 K for 1h. Uniaxial compression tests were carried out at 673K and 723K under a strain rate of 5.0x10-2s-1up to a strain of -1.0. EBSD measurement was performed for observation of crystal orientation distribution. As a result, occurrence of the dynamic recrystallization was confirmed. The position of maximum axis density of the texture and its intensity were varied depending on deformation conditions. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Magnesium alloys

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Omni-Directional Assembly of 2D Single-Crystalline Metal Nanosheets (Adv. Mater. 24/2025)

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Advanced Materials 2025年第24期37卷

作者： Seungyeon Kim Ho Kwang Choi Young-Seok Song Min-Young Seo Hyunjung Lee Sukang Bae Byung Joon Moon Seoung-Ki Lee Sang Hyun Lee Tae-Wook Kim Department of Flexible and Printable Electronics LANL-JBNU Engineering Institute-Korea Jeonbuk National University Jeonju 54896 Republic of Korea Functional Composite Materials Research Center Institute of Advanced Composite Materials Korea Institute of Science and Technology Jeollabuk-do 55324 Republic of Korea Department of JBNU-KIST Industry-Academia Convergence Research Jeonbuk National University 567 Baekje-daero Deokjin-gu Jeonju 54896 Republic of Korea School of Materials Science and Engineering Pusan National University 2 Busandaehak-ro-63-beon-gil Geumjeong-gu Busan 46241 Republic of Korea School of Chemical Engineering Chonnam National University 77 Yongbong-ro Buk-gu Gwangju 61186 Republic of Korea

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Corrections Statement to: The Role of the Bottom Oxide Layer in Oxide-Metal-Oxide (OMO) Electrode for Stretchable Organic Light-Emitting Diodes

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Advanced Materials Interfaces 2024年第16期11卷

作者： Chang Min Lee Yeong Beom Kim Subrata Sarker Dong Hyun Kim Tae Wook Kim Syed Hamad Ullah Shah Hyun Woo Cho Tae-Sung Bae Seung Min Yu Yong-Cheol Kang Sangmin Han Periyanayagam Justin Jesuraj Keum-Jin Ko Myungkwan Song Chang-Su Kim Seung Yoon Ryu Department of Applied Physics Korea University-Sejong Campus 2511 Sejong-ro Sejong 30019 Republic of Korea E-ICT–Culture-Sports Convergence Track Korea University-Sejong Campus 2511 Sejong-ro Sejong 30019 Republic of Korea Department of Materials Science and Engineering Hongik University Sejong 30016 Republic of Korea Jeonju Center Korea Basic Science Institute (KBSI) 20 Geonji-ro Deokjin-gu Jeonju Jeollabuk-do 54907 Republic of Korea Department of Chemistry Pukyong National University 45 Yongso-Ro Nam-gu Busan 48513 Republic of Korea Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603 203 India Surface Technology Division Korea Institute of Materials Science (KIMS) Changwon 51508 Republic of Korea Department of Physics Dongguk University Seoul 04620 Republic of Korea

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