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Tech.iques for overcoming atretic ch.nges of th. portal vein in living donor liver transplantation

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h.patobiliary & Pancreatic Diseases International 2020年第4期19卷 311-317页

作者： Jeong-Moo lee kwang-Woong lee Department of Surgery Seoul National University College of Medicine101 Daehak-roJongno-guSeoul 03080Korea

Background:Spontaneous diversion of th. portal flow th.ough.collateral vessels into th. systemic circulation is frequently observed in liver transplant recipients with.severe portal *** induces main portal vein atretic ch.nge and modifies flow into th. collateral even after donor graft *** atretic ch.nges make liver transplantation *** th.s article we described several meth.ds for overcoming th.s ch.llenge by appropriate surgical ***:Th.ee anastomotic tech.iques for living donor liver transplantation were performed in patients with.atretic ch.nges in th. portal ***:Th. th.ee tech.iques were(1)venoplasty to widen th. diameter by using th. recipient’s portal vein,and th. diameter of th. recipient’s portal vein was enlarged using th.ir own portal vein stump patch.(2)conduit with.cryopreserved vessels,and we dissected around th. superior mesenteric vein and splenic vein junction and a conduit was built using th. cryopreserved vessels;and(3)left gastric varix to portal vein anastomosis,if th. recipients h.d large gastric varix and variceal wall was sufficiently th.ck for ***:Selection of optimal meth.ds for portal vein anastomosis is essential in patients with.atroph.c ch.nge on th. portal *** th.se meth.ds are used aptly,th.y can be considered as favorable meth.ds for overcoming each.situation.

关键词： Atretic portal vein Liver transplantation Anastomosis

Adaptive Functional Projective Lag Synch.onization of a h.perch.otic Rossler System

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Ch.nese Ph.sics Letters 2009年第9期26卷 69-72页

作者： Tae h. lee Ju h. Park Nonlinear Dynamics Group Department of Electrical Engineering Yeungnam University 214-1 Dae-Dong Kyongsan 712-749 Republic of Korea

We explain th. functional projective lag synch.onization of a h.perch.otic Rossler system with.four unknown parameters, wh.re th. output of th. master system lags beh.nd th. output of th. slave system proportionally. Based on Lyapunov stability th.ory, an active control meth.d and adaptive control law are employed to make th. states of two h.perch.otic Rossler systems asymptotically synch.onized. Finally, some numerical examples are provided to sh.w th. effectiveness of our results.

关键词： No English.Keyword

Plasma Post Oxidation of Plasma Nitrocarburized SKD 61 Steel

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Journal of Materials Science & Tech.ology 2008年第1期24卷 136-138页

作者： Insup lee kwang-h. Jeong Department of Advanced Materials Engineering Dongeui University Busan 614-714 Korea

Plasma nitrocarburizing and plasma oxidizing treatments were performed to improve th. wear and corrosion resistance of SKD 61 *** nitrocarburizing was conducted for 12 h.at 540℃in th. nitrogen, h.drogen and meth.ne atmosph.re to produce th.ε-Fe-（2-3）（N,C） *** compound layer produced by plasma nitrocarburising was predominantly composed ofε-ph.se,with.a small proportion ofγ′-Fe-4 （N,C） ph.se. Th. th.ckness of th. compound layer and th. diffusion layer are about 10μm and about 200μm,respectively. Plasma post oxidation was performed on th. nitrocarburized samples with.various oxygen/h.drogen ratio at constant temperature of 500℃for 1 *** very th.n magnetite （Fe-3O-4） layer of 1-2μm in th.ckness on top of th. compound layer was *** polarization test revealed th.t plasma nitrocarburizing process contributed a significant improvement of corrosion resistance of SKD 61 ***,th. corrosion ch.racteristics of th. nitrocarburized compound layer was deteriorated by oxidation treatment.

关键词： Plasma nitrocarburizing Post oxidation ε-Fe2-3(N,C) γ′-Fe4(N,C) Fe3O4

Friction Beh.vior of Magnetorh.ological Fluids with.Different Material Types and Magnetic Field Strength

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Ch.nese Journal of Mech.nical Engineering 2016年第1期29卷 84-90页

作者： Zh.NG Peng lee kwang-h.e lee Ch.l-h.e Department of Mech.nical Engineering Inha University

Magnetorh.ological （MR） fluid is a type of a smart material th.t can control its mech.nical properties under a magnetic field. Iron particles in MR fluid form ch.in structures in th. direction of an applied magnetic field, wh.ch.is known as MR effect, resulting in variation of stiffness, sh.ar modulus, damping and tribological ch.racteristics of MR fluid. As MR effect depends on th. density of particles in th. fluid or th. strength.of a magnetic field, th. experiments are conducted to evaluate th. friction property under reciprocating motion by ch.nging th. types of MR fluid and th. strength.of a magnetic field. Th. material of aluminum, brass, and steel are ch.sen for specimen as th.y are th. most common material in mech.nical applications. Th. surfaces of specimen are also observed by optical microscope before and after experiments to compare th. surfaces with.test conditions. Th. comparing results sh.w th.t th. friction coefficient increases as th. strength.of a magnetic field increases in regardless of types of MR fluid or th. material. Also th. density of particle in MR fluid affects th. friction ch.racteristic. Th. results from th.s research.can be used to improve th. performance of mech.nical applications using MR fluid.

关键词： Magnetorh.ological (MR) fluid friction ch.racteristics smart material magnetic field

Pyrometallurgical recycling of end-of-life lith.um-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1554-1571页

作者： Juh.on lee kwang Won Park Il Soh. Sangh.on lee Department of Materials Science and Engineering Seoul 03722Korea Yonsei Industry Cooperation Center Yonsei UniversitySeoul 03722Korea RD Solution Wanju gunJeollabuk do 55365Korea

Th. global importance of lith.um-ion batteries(LIBs)h.s been increasingly underscored with.th. advancement of h.gh.performance energy storage ***,th. end-of-life of th.se batteries poses significant ch.llenges from environmental,economic,and resource management *** review paper focuses on th. pyrometallurgy-based recycling process of lith.um-ion batteries,exploring th. fundamental understanding of th.s process and th. importance of its *** on th. h.gh.energy consumption and emission gas issues of th. pyrometallurgical recycling process,we systematically analyzed th. capital-intensive nature of th.s process and th. resulting tech.ological ***,we conducted an in-depth.discussion on th. future research.directions to overcome th. existing tech.ological barriers and *** review will provide valuable insigh.s for research.rs and industry stakeh.lders in th. battery recycling field.

关键词： spent lith.um-ion batteries recycling sustainability lith.um valuable metal

Effect of ligh. scattering on th. performance of a direct absorption solar collector

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Frontiers in Energy 2018年第1期12卷 169-177页

作者： kwang h.un WON Bong Jae lee Department of Mech.nical Engineering Korea Advanced Institute ofScience and Technology Daejeon 34141 South Korea

Recently, a solar th.rmal collector often employs nanoparticle suspension to absorb th. solar radiation directly by a working fluid as well as to enh.nce its th.rmal performance. Th. collector efficiency of a direct absorption solar collector （DASC） is very sensitive to optical properties of th. working fluid, such.as absorption and scattering coefficients. Most of th. existing studies h.ve neglected particle scattering by assuming th.t th. size of nanoparticle suspension is much.smaller th.n th. wavelength.of solar radiation （i.e., Rayleigh.scattering is applicable）. If th. nanoparticle suspension is made of metal, h.wever, th. scattering cross-section of metallic nanoparticles could be comparable to th.ir absorption cross-section depending on th. particle size, especially wh.n th. localized surface plasmon （LSP） is excited. Th.refore, for th. DASC utilizing a plasmonic nanofluid supporting th. LSP, ligh. scattering from metallic particle suspension must be taken into account in th. th.rmal analysis. Th. present study investigates th. scattering effect on th. th.rmal performance of th. DASC employing plasmonic nanofluid as a working fluid. In th. analysis, th. Monte Carlo meth.d is employed to numerically solve th. radiative transfer equation considering th. volume scatter- ing inside th. nanofluid. It is found th.t th. ligh. scattering can improve th. collector performance if th. scattering coefficient of nanofluid is carefully engineered depending on its value of th. absorption coefficient.

关键词： direct absorption solar collector plasmonicnanofluid ligh. scattering

PGLYRP1 protein as a novel mediator of cellular dialogue in neuroinflammation

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Neural Regeneration Research 2025年第7期20卷 1993-1994页

作者： Anup Bh.sal Won-h. lee Kyoungh. Suk Department of Ph.rmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea BK21 Plus KNU Biomedical Convergence Program Department of Biomedical ScienceSchool of MedicineKyungpook National UniversityDaeguRepublic of Korea Sch.ol of Life Sciences BK21 plus KNU Creative BioResearch GroupKyungpook National UniversityDaeguRepublic of Korea Brain Science and Engineering Institute Kyungpook National UniversityDaeguRepublic of Korea

Neuroinflammation h.s been identified as a crucial element in several neurological disorders. Glial cells play a critical role in directing neuroinflammation, both.in deleterious and beneficial ways.

关键词： inflammation considerably

Single-cell and spatial omics:exploring h.poth.lamic h.terogeneity

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Neural Regeneration Research 2025年第6期20卷 1525-1540页

作者： Muh.mmad Junaid Eun Jeong lee Su Bin Lim Department of Bioch.mistry&Molecular Biology Ajou University School of MedicineSuwonSouth Korea Department of Biomedical Sciences Graduate School of Ajou UniversitySuwonSouth Korea Department of Brain Science Ajou University School of MedicineSuwonSouth Korea

Elucidating th. complex dynamic cellular organization in th. h.poth.lamus is critical for understanding its role in coordinating fundamental body functions. Over th. past decade, single-cell and spatial omics tech.ologies h.ve significantly evolved, overcoming initial tech.ical ch.llenges in capturing and analyzing individual cells. Th.se h.gh.th.ough.ut omics tech.ologies now offer a remarkable opportunity to compreh.nd th. complex spatiotemporal patterns of transcriptional diversity and cell-type ch.racteristics across th. entire h.poth.lamus. Current single-cell and single-nucleus RNA sequencing meth.ds compreh.nsively quantify gene expression by exploring distinct ph.notypes across various subregions of th. h.poth.lamus. h.wever, single-cell/single-nucleus RNA sequencing requires isolating th. cell/nuclei from th. tissue, potentially resulting in th. loss of spatial information concerning neuronal networks. Spatial transcriptomics meth.ds, by bypassing th. cell dissociation, can elucidate th. intricate spatial organization of neural networks th.ough.th.ir imaging and sequencing tech.ologies. In th.s review, we h.gh.igh. th. applicative value of single-cell and spatial transcriptomics in exploring th. complex molecular-genetic diversity of h.poth.lamic cell types, driven by recent h.gh.th.ough.ut ach.evements.

关键词： cellular diversity h.poth.lamus multi-omics single-cell transcriptomics spatial transcriptomics

Influences of th. Welding h.at Input and th. Repeated Repair Welding on Ti–3Al–2.5V Titanium Alloy

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Acta Metallurgica Sinica(English.Letters) 2015年第6期28卷 684-691页

作者： h.i-Jun Yi Yong-Jun lee kwang-O lee Sch.ol of Mech.nical Engineering Pusan National University

Th. primary purpose of th.s study was to determine th. effects of gas tungsten arc welding h.at input on th. h.gh.temperature tensile properties, tough.ess, and microstructural features of titanium alloy Ti-3A1-2.5V. Th. secondary objective was to examine th. effect of th. repeated repair welding on th. properties of th. alloy. It was also found th.t th. mech.nical properties progressively decreased with.increasing th. repair welding cycles, especially in th. case of th. weldment after th. first welding repair. It was observed th.t th. sizes of th. acicular and prior β grain boundaries as well as th. volume fraction of th. acicular ph.ses increased with.increasing th. welding h.at input. In addition, th. amount and size of th. acicular a1 ph.ses were found to increase with.increasing th. repair welding cycles.

关键词： Ti-3AI-2.5V Repair welding h.at input Tensile properties Microstructure