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Energy & Environm.ntal materials 2024年第4期7卷 344-354页

作者： Jamil Ur Rahm.n Woo Hyun nam Yong-Jae jung Jong Ho Won Jong-m.n Oh nguyen Van Du Gul Rahm.n Víctor m.García-Suárez Ran He Kornelius nielsch jung Young Cho Won-Seon Seo Jong wook Roh Sang-il Kim Soonil Lee Kyu Hyoung Lee Hyun Sik Kim Weon Ho Shin Leibniz Institute for Solid State and materials Research Advanced materials Convergence R&D Division Korea Institute of Ceramic Engineering & Technology Departm.nt of Electronic materials Engineering Kwangwoon University Departm.nt of Energy Engineering Dankook University Faculty of Fundam.ntal Science Phenikaa University Departm.nt of Physics Quaid-i-Azam University Departam.nto de Física Universidad de Oviedo nanomaterials and nanotechnology Research Center-CInn Departm.nt of materials Science and Engineering Yonsei University School of nano & materials Science and Engineering Kyungpook National University Departm.nt of materials Science and Engineering University of Seoul School of materials Science and Engineering Changwon National University

Bi2Te3-based materials have drawn much attention from the thermoelectric comm.nity due to their excellent thermoelectric perform.nce near room ***,the stability of existing n-type Bi2（Te,Se）3materials is still low due to the evaporation energy of Se (37.70 kJ mol-1) being much lower than that of Te (52.55 kJ mol-1).The evaporated Se from the material causes problems in interconnects of the module while degrading the efficiency.

关键词： Bi2Te3 energy harvesting FeTe2 nanoinclusion n-type materials thermoelectric

Switchable p-n-p conduction and thermoelectric properties of selenium-doped tellurium crystal

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Rare metals 2024年第11期 5975-5984页

作者： Stanley Abbey Hanhwi Jang Brakowaa Frimpong Van Quang nguyen Sunglae Cho Yeon Sik jung m.n-wook Oh Departm.nt of materials Science and Engineering Hanbat National University Departm.nt of materials Science and Engineering Korea Advance Institute of Science and Technology Departm.nt of Phy sics and Energy Harvest-Storage Research Center University of Ulsan

Switchable conductivity in elem.ntary semiconducting materials has a high potential for the design of diodes,transistors and energy conversion ***,the ability to utilize their physical properties is dependent on doping within the carrier density transition ***-crystal tellurium has a high Seebeck coefficient and intrinsic p-n-p conduction at room temperature and therefore,is not suitable for thermoelectric *** dem.nstrate that the addition of iso valent Se lowers the Fermi level to achieve a stable p-type conductivity with a high band degeneracy near the valence *** observed shifts in the n-p transition temperature below the intrinsic conductivity at 470 K based on changes in stoichiometry and carrier concentration above *** addition,the high thermal conductivity is significantly reduced with the increase in Se alloying due to the mass and strain *** results in a moderately high zT of 0.4 at 673 K.

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Unraveling the role of mETTL14 in metabolic dysfunction-associated fatty liver disease:insights and therapeutic implications

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Signal Transduction and Targeted Therapy 2024年第5期9卷 1781-1783页

作者： So jung Kim Jeongeun Hyun Institute of Tissue Regeneration Engineering(ITREn) Dankook UniversityCheonanRepublic of Korea Departm.nt of nanobiomedical Science and BK21 PLUS nBm Global Research Center for Regenerative medicine Dankook UniversityCheonanRepublic of Korea mechanobiology Dental medicine Research Center College of DentistryDankook UniversityCheonanRepublic of Korea

The recent article published in Signal Transduction and Targeted Therapy sheds light on the significance of n6-methyladenosine(m6A)methyltransferase-like protein mETTL14 in mitigating the progression of metabolic dysfunction-associated fatty liver disease(mAFLD).1 In this study,Wang et *** the downregulation of mETTL14 in hepatocytes from both mAFLD patients and high-fat diet(HFD)-induced mAFLD mouse models,underscoring its pivotal role in maintaining hepatic lipid and redox homeostasis in normal livers.

关键词： liver homeostasis al.

mXene-based hybrid materials for electrochemical and photoelectrochemical H_(2) generation

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Journal of Energy Chemistry 2024年第6期93卷 111-125,I0004页

作者： Jun Young Kim Seung Hun Roh Chengkai Xia Uk Sim jung Kyu Kim School of material Science and Engineering North University of ChinaTaiyuan 030051China School of Chemical Engineering Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology(KENTECH)NajuJeollanamdo 58330Republic of Korea SKKU Advanced Institute of nano Technology(SAInT) Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea

The conversion of solar energy to produce clean hydrogen fuel through water splitting is an emerging strategy for efficiently storing solar energy in the form of solar *** aligns with the increasing global dem.nd for the developm.nt of an ideal energy alternative to fossil fuels that does not emit greenhouse ***(EC) and photoelectrochemical(PEC) water splitting technologies have garnered significant attention worldwide for advanced hydrogen solar fuel production in recent *** achieve sustainable green H_(2) production,it is essential to create efficient catalyst materials that are low-cost and can replace expensive noble metal-based *** characteristics make them an ideal catalyst material for the ***-dim.nsional mXenes with m_(n+1)X_(n) structure have been identified as a promising option for EC and PEC water splitting due to their superior hydrophilicity,metal-like conductivity,large surface area,and adjustable surface ***,we present a summary of recent advancem.nts in the synthesis and perform.nce enhancem.nt methods for mXene hybrid materials in hydrogen production through EC and PEC water ***,we exam.ne the challenges and insights associated with the rational design of mXene-based hybrid materials to facilitate efficient water splitting for sustainable solar fuel production.

关键词： mXene Hybrid materials EC PEC HER OER Water splitting

[001]-texturing of(K,na)nbO_(3)-based piezoceramics with a pseudocubic structure and their application to piezoelectric devices

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Journal of materiomics 2024年第3期10卷 632-642页

作者： Su-Hwan Go Seok-jung Park Seung-Hyun Kim Seok-June Chae Eun-Ji Kim Geun-Su Lee Sahn nahm Departm.nt of materials Science and Engineering Korea UniversitySeoul02841Republic of Korea

0.96(K_(0.5)na_(0.5-z)Li_(z))(nb_(0.92)Sb_(0.08))O_(3)-0.04(Ca_(0.5)Sr_(0.5))ZrO_(3)[(Kn_(0.5-z)L_(z))nS-CSZ]piezoceramics(0≤z≤0.04)were aligned in the[001]orientation using 3%(in mole)nanbO_(3)templates with a large Lotgering factor(>97%).Their crystal structures transformed from the orthorhombic-pseudocubic(O-P)structure to the orthorhombic-tetragonal-pseudocubic(O-T-P)structure with an increasing *** P structure was interpreted as a rhombohedral R3m *** piezoelectricity of the compositions increased after[001]-texturing,and the enhancem.nt was proportional to the O phase *** composition(z=0.03)exhibited the highest piezoelectric constant(d_(33);670 pC/n)and electromechanical coupling factor(k_(p);0.56).Piezoelectric energy harvesters were produced using the untextured and textured samples(z=0.03).The textured harvester delivered a large power density of 26.6 mW/mm^(3),which was larger than that of the untextured harvester owing to the enhanced kp and d_(33)×g_(33) of the textured piezoceramic.A multilayer actuator was produced using the textured sample(z=0.03),and it exhibited a large acceleration(44.2 G)and displacem.nt(±3,730 mm)at±25 ***,the[001]-textured(Kn_(0.47)L_(0.03))nS-CSZ piezoceramic is suitable for piezoelectric energy harvesters and actuators.

关键词： Knn-Based piezoceramic Lead-free Energy harvester Actuator Reactive template grain growth

Some Results on noetherian Warfield Domains

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Algebra Colloquium 2022年第1期29卷 67-78页

作者： Kui Hu jung wook Lim Dechuan Zhou College of Science Southwest University of Science and Technology MianyangSichuan 621010China Kyungpook national University Daegu 41566Korea Departm.nt of mathematics College of Natural Sciences Kyungpook National UniversityDaegu 41566Korea

Let R be a *** this paper,we show that if R is one dim.nsional,then R is a noetherian Warfield domain if and only if every maximal ideal of R is 2-generated and for every maximal ideal m of R,m is divisorial in the ring(m:m).We also prove that a noetherian domain R is a noetherian Warfield domain if and only if for every maximal ideal m of R,m^(2) can be generated by two ***,we give a sufficient condition under which all ideals of R are strongly Gorenstein projective.

关键词： strongly Gorenstein projective module noetherian Warfield domain strongly Gorenstein Dedekind domain

Vehicle Positioning Based on Optical Camera Comm.nication in V2I Environm.nts

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Computers, materials & Continua 2022年第8期72卷 2927-2945页

作者： Pankaj Singh Huijin Jeon Sookeun Yun Byung wook Kim Sung-Yoon jung Departm.nt of Electronic Engineering Yeungnam UniversityGyeongsan38541Korea HD map Developm.nt Team Hyundai Autoever Co.Ltd.Seoul06171Korea Departm.nt of Information and Comm.nication Engineering Changwon National UniversityChangwon51140Korea

Dem.nd for precise vehicle positioning(VP)increases as autonomous vehicles have recently been drawing *** paper proposes a scheme for positioning vehicles on the move based on optical camera comm.nication(OCC)technology in the vehicle-to-infrastructure(V2I)***-emitting diode(LED)streetlights and vehicle cameras are used as transmitters and receivers *** of streetlights are detected and traced by exam.ning images that are obtained from cameras of ***,a scheme for analyzing visible light data extracted from the images is *** proposed vehicle positioning scheme uses information on angles between vectors that are formed under the collinearity conditions between the absolute coordinates of at least three received streetlights,and the coordinates of an image *** experim.nts are performed under stationary state and moving state at a speed of 5 and 20 km/*** verify the reliability of the proposed scheme,a comparison is made between the actual and estimated location of the camera in the stationary *** addition,the path of a moving vehicle and the estimated path of the vehicle are compared to check the perform.nce of the *** perform.nce of the proposed technique is analyzed and experim.ntal dem.nstration confirms that the proposed OCC-based VP scheme achieves positioning accuracy of under 1 m.

关键词： Optical camera comm.nication vehicle-to-infrastructure LED streetlight intelligent transport system vehicle positioning collinearity

Pedestrian walking characteristics at stairs according to width change for application of piezoelectric energy harvesting

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Journal of Central South University 2012年第3期19卷 764-769页

作者： YI mi-hui nA wook-jung HOnG Won-hwa JEOn Gyu-yeob School of Architecture and Civil Engineering Kyungpook National University Daegu 702-701 South Korea Departm.nt of Architecture Jeju National University Jeju 690-756 South Korea

This work aims at finding pedestrian walking characteristics at U-type stairs according to the width change of stairs and appropriate spot for installing piezoelectric energy *** number of pedestrian at two kinds of stairs(one is stairs with 1.5 m in width and the other is stairs with 3 m in width) was estimated by calculating the number of steps on the stairs by a zone which is divided into 30 cm×30 *** result shows high density in the middle in the case of narrow stairs but traffic is concentrated on stair inside(pillar side) in stairs with large *** conclusion,the location for installation of piezoelectric energy harvesting system should be considered differently on stairs width and the number of installation depends on total expected traffic and the expected traffic for a device.

关键词： piezoelectric energy harvesting pedestrian walking hum.n power traffic distribution

Internal modification in transparent hybrid germ.nium-silica plates using plasma formation induced by a femtosecond laser

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中国有色金属学会会刊：英文版 2012年第S3期22卷 808-812页

作者： Ji-wook YOOn jung-Kyu PARK Kwang-Ho KIm myung-Chang KAnG Sung-Hak CHO nano machining Laboratory Korea Institute of Machinery and Materials Departm.nt of nano-mechatronics University of Science and Technology national Core Research Center for Hybrid materials Solution Pusan National University

The fabrication of an internal diffraction grating with photoinduced refractive index modification in planar hybrid germ.nium-silica plates was dem.nstrated using low-density plasma formation excited by a high-intensity femtosecond (150 fs) Ti:sapphire laser (λp=790 nm).The refractive index modifications with diameters ranging from 400 nm to 3 μm were photoinduced after plasma formation occurred upon irradiation with peak intensities of more than 2×1013 W/*** graded refractive index profile was fabricated to be a symmetric around from the center of the point at which low-density plasma occurred.

关键词： diffraction grating refractive index modification plasma formation hybrid germ.nium-silica plate femtosecond laser

microstructure and corrosion resistance of a mg2Sn-dispersed mg alloy subjected to pulsed electron beam treatm.nt

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Journal of magnesium and Alloys 2020年第2期8卷 345-351页

作者： Daseul Lee Beomcheol Kim Soo-m.n Baek Jisoo Kim Hyung wook Park jung Gu Lee Sung Soo Park School of materials Science and Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of mechanical Aerospace and Nuclear EngineeringUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of materials Science and Engineering University of UlsanUlsan 44610Republic of Korea

We report that the corrosion resistance of a mg-Sn-based alloy with mgzSn precipitates can be considerably improved by surface modification using pulsed electron beam *** alloy subjected to a pulse electron beam treatm.nt showed a modified surface layer with a thickness of〜12 μm,appearing more resistant to corrosion attack than the bare surface of the *** 0.6 m.naCl solution,the alloys with and without the surface modification exhibited average corrosion rates of 4.3 and 8.1 mm y^-1,*** improved corrosion resistance was attributed to reduced cathodic activation,resulting from the surficial reduction of relatively noble mg2Sn precipitates.

关键词： magnesium alloy mg2Sn Intermetallic compound Pulsed electron beam treatm.nt Corrosion