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Split-dose bowel preparation improves adequacy of bowel preparation and gastroenterologists' adherence to National Colorectal Cancer Screening and Surveillance Guidelines

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World Journal of Gastroenterology 2018年第6期24卷 716-724页

作者： Stacy Bartnik Menees h Myra kim Philip Schoenfeld Division of Gastroenterology University of Michigan Health System Division of Gastroenterology Ann Arbor Veterans’ Administration Hospital Center for Statistical Consultation and Research University of Michigan Department of Biostatistics University of Michigan Division of Gastroenterology John D.Dingell VA Medical Center

AIM To quantify the impact of split-dose regimen on endoscopists' compliance with guideline recommendations for timing of repeat colonoscopy in patients with normal colonoscopy or 1-2 small polyps(hODS A retrospective chart review of all endoscopy reports was undertaken in average-risk individuals > 50 years old with.a normal screening colonoscopy and 1-2 small polyps. Data were abstracted from two time periods, pre and post-split-dose bowel preparation institution. Main outcome measurements were recommendation for timing of repeat colonoscopy and bowel preparation quality. Bivariate analysis by χ~2 tests and Student's t-tests were performed to assess differences between the two cohorts. Multivariable logistic regression was used with guideline consistent recommendations as the dependent variables and an indicator for 2011 cohort as the primary predictor. RESULTS Four thousand two hundred and twenty-five patients were included in the study; 47.0%(1987) prior to the institution of split dose bowel preparation, and 53.0%(2238) after the institution of split dose bowel preparation. Overall, 82.2%(n = 3472) of the colonoscopies were compliant with guideline recommendations, with.a small but significantly increased compliance rate in year 2011(83.7%) compared to year 2009(80.4%, P = 0.005), corresponding to an unadjusted odds ratio of 1.25(95%CI: 1.07-1.47; P = 0.005). Colonoscopies with either "Adequate" or "Excellent" had increased from 30.6% in year 2009 to 39.6% in year 2011(P however, there was no significant difference in poor/inadequate category of bowel preparation as there was a mild increase from 4.6% in year 2009 to 5.1% in year 2011(P = 0.50). CONCLUSION Split-dose bowel regimen increases endoscopists' compliance to guidelines in average-risk patients with normal colonoscopy or 1-2 small polyps.

关键词： Colorectal cancer screening Bowel preparation Colonoscopy Average-risk

R & D ACTIVITIES ON AEROSPACE MATERIALS IN KOREA

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 417-421页

作者： h.M. kim(Korea Institute of Machinery and Materials,Korea ) Korea Inst of Machinery and Materials South Korea

This paper briefly reviews research.and development programs in Korean aerospace industry,with.an emphasis on aircraft materials technology. International collaborations in these areas are outlined and the R & D activities are highlighted against the background of the national *** is shown that the investment from government agencies and large enterprises has led to h.althy development of aerospace materials industries in Korea.

关键词： R & D aerospace materials international collaboration Korea

Microstructure,Elastic Modulus and Tensile Properties of Ti-Nb-O Alloy System

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Journal of Materials Science & Technology 2008年第1期24卷 33-36页

作者： h.S.kim T.Y.Ra I.D.Yeo h.J.Bang Y.G.Yoo W.Y.kim Advanced Materials R＆D Division Korea Institute of Industrial Technology Incheon 406-800 Korea

In the present study Ti-Nb binary alloy system was chosen because it has excellent biocompatibility as well as reasonable mechanical properties,aiming at understanding oxygen content on microstructural formation, elastic modulus and tensile properties in Ti-Nb alloy *** alloy buttons of 50 mm in diameter were prepared by arc melting on a water-cooled copper h.arth under an argon gas atmosphere with.a non-consumable tungsten *** button ingots were then h.at treated in a vacuum atmosphere at 1273 K for 0.5 h followed by water quenching in a specially designed h.at treatment ***,elastic modulus and tensile properties were investigated in order to understand the effect of oxygen content in quenched Ti- Nb alloy *** orthorhombic structuredα″martensite was changed to bcc structuredβ-phase with increasing Nb ***,it was found that oxygen makesβ-phase stable in quenched Ti-Nb alloy *** modulus values were sensitive to phase stability of constituent *** strength increased with increasing oxygen *** will be explained by phase formation and stability behavior.

关键词： Ti-Nb-O alloy Phase stability Elastic modulus Mechanical properties

Plant glycosylphosphatidylinositol anchored proteins at the plasma membrane-cell wall nexus

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Journal of Integrative Plant Biology 2018年第8期60卷 649-669页

作者： Trevor h.Yeats Antony Bacic kim L.Johnson School of Integrated Plant Sciences Section of Plant Biology Cornell University Robert W.holley Center for Agriculture and h.alth USDA-ARS Cornell University Australian Research Council Centre of Excellence in Plant Cell Walls School of Bio Sciences University of Melbourne La Trobe Institute for Agriculture & Food Department of Animal Plant and Soil Sciences La Trobe University

Approximately 1% of plant proteins are predicted to be post-translationally modified with.a glycosylphospha- tidylinositol （GPI） anchor that tethers the polypeptide to the outer leaflet of the plasma membrane. Whereas the synthesis and structure of GPI anchors is largely conserved across eukaryotes, the repertoire of functional domains present in the GPl-anchored proteome has diverged substantially. In plants, this includes a large fraction of the GPl-anchored proteome being further modified with plant-specific arabinogalactan （AG） O-glycans. The impor- tance of the GPl-anchored proteome to plant development is underscored by the fact that GPI biosynthetic null mutants exhibit embryo lethality. Mutations in genes encoding specific GPl-anchored proteins （GAPs） further supports their contribution to diverse biological processes, occurring at the interface of the plasma membrane and cell wall, including signaling, cell wall metabolism, cell wall polymer cross-linking, and plasmodesmatal transport. here, we review the literature concerning plant GPl-anchored proteins, in the context of their potential to act as molecular hubs that mediate interactions between the plasma membrane and the cell wall, and their potential to transduce the signal into the protoplast and, thereby, activate signal transduction path.ays.

关键词： GPI Plant glycosylphosphatidylinositol anchored proteins at the plasma membrane-cell wall nexus

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.Jeong S.W.Lee W.J.kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the h.ating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

Optimal deployment schedule of an active twist rotor for performance enhancement and vibration reduction in high-speed flights

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Chinese Journal of Aeronautics 2017年第4期30卷 1427-1440页

作者： Young h.YOU Sung N.JUNG Chang J.kim Department of Aerospace Information Engineering Konkuk University Seoul 05019 Republic of Korea

The best active twist schedules exploiting various waveform types are sought taking advantage of the global search.algorithm for the reduction of hub vibration and/or power required of a rotor in high-speed conditions. The active twist schedules include two non-harmonic inputs formed based on segmented step functions as well as the simple harmonic waveform input. An advanced Particle Swarm assisted Genetic Algorithm（PSGA） is employed for the optimizer. A rotorcraft Computational Structural Dynamics（CSD） code CAMRAD II is used to perform the rotor aeromechanics analysis. A Computation Fluid Dynamics（CFD） code is coupled with CSD for verification and some physical insights. The PSGA optimization results are verified against the parameter sweep study performed using the harmonic actuation. The optimum twist schedules according to the performance and/or vibration reduction strategy are obtained and their optimization gains are compared between the actuation cases. A two-phase non-harmonic actuation schedule demonstrates the best outcome in decreasing the power required while a four-phase non-harmonic schedule results in the best vibration reduction as well as the simultaneous reductions in the power required and vibration. The mechanism of reduction to the performance gains is identified illustrating the section airloads, angle-of-attack distribution, and elastic twist deformation predicted by the present approaches.

关键词： Active twist high-speed flight hub vibration Non-harmonic Power required

Direct Observation of Tunnelling through 100-nm-Wide All Metal Magnetic Junction into Si

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Chinese Physics Letters 2008年第4期25卷 1407-1410页

作者： Nam h.kim 王克强张宇王建青 Department of Physics State University of New York Binghamton NY 13902 USA School of Information Zhongkai University of Agriculture and Technology Guangzhou 510225 Department of EleetrieaJ Engineering State University of New York Binghamton NY 13902 USA

Nanoscaled spin-dependent tunnelling lines were patterned on doped Si and studied for tunnelling from the SDT ferromagnetic layer through.an insulating barrier into Si. The injection contacts have the form of long strips with width.and separation, ranging from 100 nm to 2 μm, and are patterned using e-beam lithography. The measured I-V characteristics versus temperature （80 to 300K） on the 100 nm scaled devices between the layered-magnetic metals and the semiconductor clearly showed ballistic tunnelling, with weak dependence on the temperature. This is qualitatively different, at elevated temperatures, from 2-μm-wide scaled-up spin-dependent tunnelling structures, where thermal-ionic emission was observed to dominate carrier transport.

关键词： supernova explosion proto-neutron star shock wave

New results on stability criteria for neural networks with time-varying delays

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Chinese Physics B 2011年第5期20卷 163-173页

作者： O.M.Kwon J.W.Kwon S.h.kim School of Electrical Engineering Chungbuk National University410 SungBong-RoHeungduk-guCheongju 361-763Republic of Korea Department of Computer Engineering Kyungwon UniversitySan 65Sujung-guSungnam 461-701Republic of Korea School of Integrated Technology College of EngineeringYonsei University50 Yonsei-RoSeodaemun-guSeoul 120-749Republic of Korea

In this paper, the problem of stability analysis for neural networks with time-varying delays is considered. By constructing a new augmented Lyapunov-Krasovskii＇s functional and some novel analysis techniques, improved delaydependent criteria for checking the stability of the neural networks are established. The proposed criteria are presented in terms of linear matrix inequalities （LMIs） which can be easily solved and checked by various convex optimization algorithms. Two numerical examples are included to show the superiority of our results.

关键词： neural networks time-varying delays stability Lyapunov method

Cathode nanoarchitectonics with Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3): Overcoming the energy barriers of multielectron reactions for sodium-ion batteries

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Carbon Energy 2024年第9期6卷 1-14页

作者： Vaiyapuri Soundharrajan Sungjin kim Subramanian Nith.ananth Muhammad h.alfaruqi JunJi Piao Duong Tung Pham Vinod Mathew Sang A.han Jung ho kim Jaekook kim Department of Materials Science and Engineering Chonnam National UniversityBukguGwangjuRepublic of Korea Graduate School of Science and Technology Shizuoka UniversityHamamatsuShizuokaJapan Departemen Teknik Metalurgi Universitas Teknologi SumbawaSumbawaIndonesia School of Engineering Physics Hanoi University of Science and TechnologyHanoiVietnam Institute for Superconducting and Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)University of WollongongNorth WollongongNew South WalesAustralia Research Center for Artificial Intelligence Assisted Ionics Based Materials Development Platform Chonnam National UniversityGwangjuRepublic of Korea

high electrochemical stability and safety make Na+superionic conductor(NASICON)-class cathodes highly desirable for Na-ion batteries(SIBs).however,their practical capacity is limited,leading to low specific ***,the low electrical conductivity combined with.a decline in capacity upon prolonged cycling(>1000 cycles)related to the loss of active material-carbon conducting contact regions contributes to moderate rate performance and cycling *** need for high specific energy cathodes that meet practical electrochemical requirements has prompted a search for new ***,we introduce a new carbon-coated Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3)(NVFTP/C)material as a promising candidate in the NASICON family of cathodes for *** a high specific energy of∼457 Wh kg^(-1) and a high Na+insertion voltage of 3.0 V versus Na^(+)/Na,this cathode can undergo a reversible single-phase solid-solution and two-phase(de)sodiation evolution at 28 C(1 C=174.7 mAh g^(-1))for up to 10,000 *** study highlights the potential of utilizing low-cost and highly efficient cathodes made from Earth.abundant and harmless materials(Fe and Ti)with enriched Na^(+)-storage properties in practical SIBs.

关键词： Fe and Ti swapping Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3) prolonged cycle life structural stabilit