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Probing temperature-dependent interlayer coupling in a MoS2/h-BN heterostructure

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Nano Research 2020年第2期13卷 576-582页

作者： Hamin Park Gwang Hyuk Shin Khang june Lee Sung-Yool Choi School of Electrical Engineering Centerfor Advanced Materials Discovery towards 3D Display KAISTDaejeon 34141Republic of Korea

Stacking of atomically thin layers of two-dimensional materials has revealed extraordinary physical phenomena owing to van der Waals(vdW)interaction at the ***,most of the studies focused on the transition metal dichalcogenide(TMD)/TMD heterostructure,while the interlayer coupling of the TMD/hexagonal boron nitride(h-BN)heterostructure has not been extensively explored despite its *** this study,the temperature-dependent interlayer coupling is demonstrated in a heterostructure of molybdenum disulfide(MoS2)and *** interface between MoS2 and the insulating substrate exerts a significant spectroscopic impact on MoS2 through substrate-induced local strain,charged impurity,and vdW *** non-resonant conditions,temperature-dependent peak shifts in Raman and photoluminescence(PL)spectra of MoS2 reveal the evolution of interlayer *** frequencies and PL peak energies at different temperatures demonstrate how substrate-induced strain,impurity,and vdW interactions at the interface influence phonon vibration and excitonic transition of *** resonant conditions at low temperature,anomalous Raman modes appear in the MoS2/h-BN heterostructure because of the enhanced electron-phonon coupling and vdW *** anomalous Raman modes are quantitatively investigated by the deconvolution of the resonance Raman spectra and described by interlayer coupling at low temperature,in agreement with complementary indications from the temperature-dependent evolution of non-resonant Raman and PL spectra.

关键词： van der Waals heterostructures interlayer coupling Raman spectroscopy excitonic resonance photoluminescence

Transforming Role of Rehabilitation Psychologists： New Paradigm Challenges, and Directions

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中国康复医学杂志 2010年第4期25卷 293-300页

作者： june LY Tang Tatia MC Lee Laboratory of Neuropsychology The University of Hong Kong Hong Kong China institute of Clinical Neuropsychology MacLehose Medical Rehabilitation Centre and The University of Hong Kong

Rehabilitation is an integrated program of interventions that support individuals with disabilities and chronic health conditions to attain 'personally fulfilling, socially meaningful,

关键词：《中国康复医学杂志》期刊编辑部读者

Crushing behavior of lightmass structural member

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中国有色金属学会会刊：英文版 2009年第B9期19卷 276-279页

作者： Kil-Sung LEE Yong-june YANG Woo-Chae HWANG in-Young YANG Department of Mechatronics Chosun University of Science and Technology Department of Advanced Part and Materials Engineering Chosun University Department of Mechanical Design Engineering Chosun University

Carbon fiber reinforced plastic (CFRP) of the advanced composite materials is widely used in lightmass structural materials of air planes, ship and automobiles because of high strength and stiffness. in this study, experimental investigation was performed for each specimen. The square section members consist of aluminum, CFRP and hybrid (aluminum/CFRP) member, and hat-shaped section members consist of CFRP and hybrid (aluminum/CFRP) members specimen. Based on the collapse characteristics of aluminum square section member, the collapse characteristics and energy absorption capability of hat-shaped section members were analyzed. The axial static collapse tests were carried out for each section member. The collapse modes and the energy absorption capability of the members were analyzed. in the lightmass design aspect, the collapse characteristics and energy absorption capability of the members were compared.

关键词：碳纤维增强复合材料碳纤维复合材料能量吸收能力行为构件破碎航空飞机 CFRP

A Branch and Bound-Based Algorithm for the Weak Linear Bilevel Programming Problems

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Wuhan University Journal of Natural Sciences 2018年第6期23卷 480-486页

作者： LiU june HONG Yunfei ZHENG Yue School of Management Huaibei Normal UniversityHuaibei 235000 Anhui China School of information and Mathematics Yangtze University Jingzhou 434023 Hubei China

Most real-world optimization problems are hierarchical involving non-cooperative objectives. Many of these problems can be formulated in terms of the first（upper level） objective function being minimized over the solution set mapping of the second（lower level） optimization problem. Often the upper level decision maker is risk-averse. The resulting class of problem is named weak bilevel programming problem. This paper presents a new algorithm which embeds a penalty function method into a branch and bound algorithm to deal with a weak linear bilevel programming problem. An example illustrates the feasibility of the proposed algorithm.

关键词： bilevel programming penalty function branch andbound algorithm

Segmented tomographic evaluation of structural degradation of carbon support in proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第11期31卷 359-367,I0010页

作者： Jung A.Hong Min-Hyoung Jung Sung Yong Cho Eun-Byeol Park Daehee Yang Young-Hoon Kim Sang-Hyeok Yang Woo-Sung Jang Jae Hyuck Jang Hyo june Lee Sungchul Lee Hu Young Jeong Young-Min Kim Department of Energy Science Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Fuel Cell Core Parts Development Cell Hyundai Mobis Co.Ltd.Uiwang 16082Republic of Korea Electron Microscopy&Spectroscopy Team Korea Basic Science Institute(KBSI)Daejeon 34133Republic of Korea Graduate School of Semiconductor Materials and Devices Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

The variation of the three-dimensional(3D)structure of the membrane electrode of a fuel cell during proton exchange cycling involves the corrosion/compaction of the carbon *** increasing degradation of the carbon structure continuously reduces the electrocatalytic performance of proton exchange membrane fuel cells(PEM-FCs).This phenomenon can be explained by performing 3D tomographic analysis at the ***,conventional tomographic approaches which present limited experimental feasibility,cannot perform such evaluation and have not provided sufficient structural information with statistical significance thus ***,a reliable methodology is required for the 3D geometrical evaluation of the carbon ***,we propose a segmented tomographic approach which employs pore network analysis that enables the visualization of the geometrical parameters corresponding to the porous carbon structure at a high *** approach can be utilized to evaluate the 3D structural degradation of the porous carbon structure after cycling in terms of local surface area,pore size distribution,and their 3D *** geometrical parameters of the carbon body were demonstrated to be substantially reduced owing to the cycling-induced *** information enables a deeper understanding of the degradation phenomenon of carbon supports and can contribute to the development of stable PEM-FC electrodes.

关键词： Electron tomography Fuel cell Proton exchange membrane Membrane electrode assembly Carbon corrosion

Overview of single-port laparoscopic surgery for colorectal cancers: Past, present, and the future

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World Journal of Gastroenterology 2014年第4期20卷 997-100页

作者： Say-june Kim Byung-Jo Choi Sang Chul Lee Department of Surgery Daejeon St. Mary’s Hospital the Catholic University of Korea

Single-port laparoscopic surgery(SPLS)is implemented through a tailored minimal single incision through which a number of laparoscopic instruments *** of operation-customized port system,utilization of a camera without a separate external light,and instruments with different lengths has brought the favorable environment for ***,performing SPLS still creates several hardships compared to multiport laparoscopic surgery;a single-port system inevitably leads to clashing of surgical instruments due to *** overcome such difficulties,investigators has developed novel concepts and maneuvers,including the concept of inverse triangulation and the maneuvers of pivoting,spreading out dissection,hanging suture,and transluminal *** final destination of SPLS is expected to be a completely seamless operation,maximizing the minimal *** extraction through the umbilicus can undermine cosmesis by inducing a larger ***,hybrid laparoscopic technique,which combined laparoscopic surgical technique with natural orifice specimen extraction(NOSE)-i.e.,transvaginal or transanal route-,has been *** and NOSE seemed to be the best combination in pursuit of minimal *** the near future,robotic SPLS with natural orifice transluminal endoscopic surgery’s way of specimen extraction seems to be *** is expected to provide a completely or nearly complete seamless operation regardless of location of the lesion in the abdomen.

关键词： Colorectal neoplasms Colectomy Laparoscopy Natural

A New Variant of Penalty Method for Weak Linear Bilevel Programming Problems

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Wuhan University Journal of Natural Sciences 2018年第4期23卷 328-332页

作者： LiU june HONG Yunfei ZHENG Yue School of Management Huaibei Normal University Huaibei235000 Anhui China School of information and Mathematics Yangtze UniversityJingzhou 434023 Hubei China

We present a new variant of penalty method, which is different from the existing penalty methods, for solving the weak linear bilevel programming problems. We then transform it into a single-level optimization problem using Kuhn-Tucker optimality condition and discuss the relations between them. Finally, two examples are used to illustrate the feasibility of the proposed penalty method.

关键词： bilevel programming pessimistic formulation penalty method

MicroRNAs are key regulators controlling iNKT and regulatory T-cell development and function

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Cellular & Molecular immunology 2011年第5期8卷 380-387页

作者： Li Zhou Jang-june Park Quanhui Zheng Zheng Dong Qingsheng Mi Henry Ford immunology Program Henry Ford Health SystemDetroitMIUSA Department of Dermatology Henry Ford Health SystemDetroitMIUSA Department of internal Medicine Henry Ford Health SystemDetroitMIUSA Department of Cellular Biology and Anatomy Medical College of GeorgiaAugustaGAUSA

MicroRNAs(miRNAs)are an abundant class of evolutionarily conserved,small,non-coding RNAs that post-transcriptionally regulate expression of their target *** evidence indicates that miRNAs are important regulators that control the development,differentiation and function of different immune *** CD4^(+)CD25^(+)Foxp3^(+) regulatory T(Treg)cells and invariant natural killer T(iNKT)cells are critical for immune homeostasis and play a pivotal role in the maintenance of self-tolerance and ***,we review the important roles of miRNAs in the development and function of iNKT and Treg cells.

关键词： invariant natural killer T cells microRNA regulatory T cells

Atomically thin heterostructure with gap-mode plasmon for overcoming trade-off between photoresponsivity and response time

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Nano Research 2021年第5期14卷 1305-1310页

作者： Khang june Lee Cheolmin Park Hyeok Jun Jin Gwang Hyuk Shin Sung-Yool Choi School of Electrical Engineering Center for Advanced Materials Discovery towards 3D DisplaysKorea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon34141Republic of Korea

Two-dimensional(2D)materials have recently provided a new perspective on optoelectronics because of their unique layered structure and excellent physical ***,their potential use as optoelectric devices has been limited by the trade-off between photoresponsivity and response ***,based on a vertically stacked atomically thin p-n junction,we propose a gap-mode plasmon structure that simultaneously enables enhanced responsivity and rapid *** atomically thin 2D materials act as a spacer for enhancing the gap-mode plasmons,and their short transit length in the vertical direction allows fast photocarrier *** demonstrate a high responsivity of up to 8.67 A/W with a high operation speed that exceeds 35 MHz under a 30 nW laser *** photocurrent,absorption,and a numerical simulation are used to verify the effectiveness of the gap-mode plasmons in the *** believe that the design strategy proposed in this study can pave the way for a platform to overcome the trade-off between responsivity and response time.

关键词： atomically thin heterostructure gap-mode plasmons photodetectors high responsivity fast response time