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辐射防护 2020年第6期40卷 486-490页

作者： Jae Hyun KIM Myeong Hyeon WOO chang ho shin Jong Kyung KIM Department of Nuclear Engineering Hanyang University222Wangsimni-roSeongdongSeoulKorea

The content analysis of radioactive waste and radiation dose evaluation is considered as one of the important factors in the reactor facility *** kind of buildings consists of the concrete for the most part and uses it as the structure and shield of the ***,the concrete has impurities such as cobalt,europium,nickel,and cesium with specific content depending on the production method or manufacturing *** radioactive nuclides generated from the fundamental components of concrete are considered that it is less contributed to the radiation dose because they are beta decay nuclides in ***,impurities of irradiated concrete in the reactor facilities,are considered occasionally an important evaluation factor for induced *** this study,the influence on the activation of impurities in concrete was evaluated from the radiation dose and induced activity *** calculation was evaluated at the bio-shield which is one of the areas with the highest neutron irradiation among the concrete structure in the reactor *** results show that radioactive nuclides with gamma decay were produced in these ***,the radiation dose of concrete with impurities was higher than concrete without *** increased radiation dose was quantified through the content of impurities.

关键词： radiation dose concrete impurity activation analysis

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红带与镜带商场

城市环境设计 2015年第5期92卷 124-131页

作者： Sung-ho Kim chang-ho shin Bok-ki Lee Jung-hoon Lee Eun-young Kim Kyung Rho WISE建筑事务所

建筑位于首尔江南区驿三洞618-2号,共两层,水平的条形镜带与垂直向的红色透明条互相重叠并且反射,营造出强烈的视觉错觉。沿着层间狭窄的楼梯往上走,反复的折射光和摇晃的不锈钢条使行走其中的人产生一种晕炫感。楼梯连接着地面和屋顶平... 详细信息

建筑位于首尔江南区驿三洞618-2号,共两层,水平的条形镜带与垂直向的红色透明条互相重叠并且反射,营造出强烈的视觉错觉。沿着层间狭窄的楼梯往上走,反复的折射光和摇晃的不锈钢条使行走其中的人产生一种晕炫感。楼梯连接着地面和屋顶平台,提供了不同的行走体验,改变了过去首尔常见的商业体块模式。我们将这条红色反光镜组成的楼梯走道称为"非凡的建筑漫步通道"。最

关键词：商业建筑商场百货商店楼梯江南区镜面板走道屋顶平台

Optimal rotor wear design in hypotrochoidal gear pump using genetic algorithm

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Journal of Central South University 2011年第3期18卷 718-725页

作者： KWON Soon-man KIM chang-Hyun shin Joong-ho Department of Mechanical Design and Manufacturing Engineering Changwon National University

The wear rate between the rotors of a hypotrochoidal gear pump is *** the knowledge of shape design on the rotors,the contact stresses without hydrodynamic effect between the rotor teeth were evaluated through the calculation of the Hertzian contact *** on the above results and the sliding velocity between the rotors,a genetic algorithm (GA) was used as an optimization technique forminimizing the wear rate proportional factor (WRPF).The result shows that the wear rate or the WRPF can be reduced considerably,*** 12.8%,throughout the optimization using GA.

关键词： gerotor hypotrochoidal gear pump Hertzian contact stress wear rate proportional factor genetic algorithm

Dual cycloid gear mechanism for automobile safety pretensioners

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Journal of Central South University 2012年第2期19卷 365-373页

作者： shin Joong-ho KIM chang-hyun YUN Pyeong-hwa KWON Soon-man Department of Mechanical Design and Manufacturing Changwon National University

The most conventional vehicle pretensioner system consists of an internal gear pair with involute teeth. however, it has been well known that the corresponding gear pairs are relatively weak under the situation of impact loadings. To improve this phenomenon, a new pretensioning gear system with cycloid teeth rather than the involute ones was proposed, and dual cycloidal gear mechanisms were designed for satisfying geometric constraints and dynamic loading conditions. The simulations of the prototypes were conducted by LS-DYNA program and the experiments for a prototype were performed for a dynamic model with impact loading devices. The results show that the better operation and the smoother motion are confirmed in the proposed cycloidal gear system rather than the conventional one without interferences between gear teeth under the impact of a crash.

关键词： seat belt pretensioner internal gear pairs involute gear dual cycloid gear

Effects of dispersoid preforming via multistep sintering of oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy

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Journal of Materials Science & Technology 2023年第9期140卷 187-200页

作者： SeungHyeok Chung Ji ho shin ho Jin Ryu Department of Nuclear and Quantum Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Central Research Institute Korea Hydro and Nuclear Power Co.Ltd.(KHNP)Daejeon 34101Republic of Korea

Dispersoid formation and microstructural evolution in an oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy(HEA)using a newly designed multistep sintering process are *** proposed multistep sintering consists of a dispersoid preforming heat treatment of as-milled 0.1 wt%Y_(2)O_(3)-CoCrFeMnNi high-entropy alloy powders at 800℃,followed by sintering at 800–1000℃ under uniaxial *** the conventional single-step sintered bulk,the coarsened BCC Y_(2)O_(3)dispersoids mainly form with an incoherent interface with the HEA *** contrast,finer FCC Y_(2)O_(3)dispersoids,an atypical form of Y_(2)O_(3),are formed in the matrix region after multistep *** of FCC Y_(2)O_(3)disper-soids is initiated on the favorable facet,the{111}plane of the austenitic matrix,with the formation of a semi-coherent interface with the matrix during the dispersoid preforming heat treatment and it maintains its refined size even after *** is found that dispersoid preforming prior to sintering appears promising to control the finer dispersoid formation and refined grain structure.

关键词： Oxide dispersion strengthening High-Entropy alloy Multistep sintering Dispersoid preforming Microstructure evolution Interfacial structure

Photocatalytic decomposition of mobile-source related pollutants using a continuous-flow reactor

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Journal of Environmental Sciences 2010年第3期22卷 460-466页

作者： Wan-Kuen Jo Seung-ho shin Department of Environmental Engineering Kyungpook National University

This study evaluated the application of a continuous-flow photocatalytic reactor for the control of two mobile-derived pollutants, methyl-tertiary butyl ether （MTBE） and naphthalene, present at in-vehicle levels. Variables tested for this study included the hydraulic diameter （HD）, stream flow rate （SFR）, relative humidity （RH）, and feeding type （FT）. The fixed parameters included contaminant concentration, ultraviolet light source, and the weight of TiO2. In all experimental conditions the adsorption process reached equilibrium within 30 to 180 min for the target compounds, and the outlet concentrations of the photocatalytic oxidation （PCO） reactor while operating reached a steady state within 60 to 180 min. The degradation of the target compounds was dependent on RH, HD, FT, or SFR. The PCO system exhibited high degradation （up to nearly 100% for certain conditions） and mineralization efficiencies of target compounds, suggesting that this system can effiectively be employed to improve indoor air quality. Moreover, it was confirmed that trichloroethylene at urban-ambient level also could enhance the degradation efficiency of naphthalene when applying the PCO technology inside vehicles.

关键词： in-vehicle level methyl-tertiary butyl ether naphthalene trichloroethylene

Surgical palliation of unresectable pancreatic head cancer in elderly patients

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World Journal of Gastroenterology 2009年第8期15卷 978-982页

作者： Sang Il Hwang Hyung Ook Kim Byung ho Son chang Hak Yoo Hungdai Kim Jun ho shin Department of Surgery Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Seoul 110-746 South Korea

AIM: To determine if surgical biliary bypass would provide improved quality of residual life and safe palliation in elderly patients with unresectable pancreatic head cancer. METhoDS: Nineteen patients, 65 years of age or older, were managed with surgical biliary bypass (Group A). These patients were compared with 19 patients under 65 years of age who were managed with surgical biliary bypass (Group B). In addition, the results for group A were compared with those obtained from 17 patients, 65 years of age or older (Group C), who received percutaneous transhepatic biliary drainage to evaluate the quality of residual life. RESULTS: Five patients (26.0%) in Group A had complications, including one intraabdominal abscess, one pulmonary atelectasis, and three wound infections. One death (5.3%) occurred on postoperative day 3. With respect to morbidity, mortality, and postoperative hospitalization, no statistically significant difference was noted between Groups A and B. The number of readmissions and the rate of recurrent jaundice were lower in Group A than in Group C, to a statistically significant degree (P = 0.019, P = 0.029, respectively). The median hospital-free survival period and themedian overall survival were also signifi cantly longer in Group A (P = 0.001 and P < 0.001, respectively). CONCLUSION: Surgical palliation does not increase the morbidity or mortality rates, but it does increase the survival rate and improve the quality of life in elderly patients with unresectable pancreatic head cancer.

关键词： Adenocarcinoma Elderly Palliative surgery Pancreas neoplasms

Evaluation of leaching characteristic and kinetic study of lithium from lithium aluminum silicate glass-ceramics by NaOH

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Journal of Environmental Sciences 2021年第9期33卷 98-110页

作者： Dongseok Lee Sung-ho Joo Dong Ju shin Shun Myung shin Resources Recovery Research Center Korea Institute of Geoscience and Mineral Resources(KIGAM)124 Gwahak-roYuseong-guDaejeon 34132Republic of Korea Department of Resources Recycling University of Science and Technology(UST)217Gajeong-roYuseong-guDaejeon 34113Republic of Korea

The behavior and mechanism of Li leaching from lithium aluminum silicate glass-ceramics which can be used as a secondary source of Li using aqueous NaOH solution was *** Li leaching efficiency is increased with increasing concentration of NaOH, specific surface area, and reaction *** leached under optimum conditions, 2 mol/L NaOH, 53 μm particle undersize, 1:10 solid/liquid ratio, 250 r/min stirring speed, 100℃ reaction temperature, 12 hr, the Li leaching efficiency was approximately 70%.however, when the leaching experiment was performed for 48 hr, the concentration of Li+ ions contained in the leach liquor decreased from 1160 to 236 mg/*** investigate the origin of this phenomenon, the obtained leach residue was analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray *** analyses show that zeolite was formed around the lithium aluminum silicate glass-ceramics, which affected the leaching of by adsorbing Li+ *** addition, using the shrinking-core model and the Arrhenius equation, the leaching reaction with NaOH was found to depends on the chemical reaction of the two reactants, with a higher than 41.84 kJ/mol of the activation energy.

关键词： Lithium aluminum silicate glass-ceramics NaOH Lithium Leaching

Climatic Classification over Asia during the Middle holocene Climatic Optimum Based on PMIP Models

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Journal of Earth Science 2016年第1期27卷 123-129页

作者： Hyuntaik Oh ho-Jeong shin Center for Marine Environmental Impact Assessment National Fisheries Research and Development Institute Ocean Circulation and Climate Research Division Korea Institute of Ocean Science and Technology

When considering potential global warming projections, it is useful to understand the impact of each climate condition at 6 kyr before present. Asian paleoclimate was simulated by performing an integration of the multi-model ensemble with the paleoclimate modeling intercomparison project（PMIP） models. The reconstructed winter（summer） surface air temperature at 6 kyr before present was 0.85 oC（0.21 oC） lower（higher） than the present day over Asia, 60oE-150oE, 10oN-60oN. The seasonal variation and heating differences of land and ocean in summer at 6 kyr before present might be much larger than present day. The winter and summer precipitation of 6 kyr before present were 0.067 and 0.017 mm·day-1larger than present day, respectively. The Group B climate, which means the dry climates based on K？ppen climate classification, at 6 kyr before present decreased 17% compared to present day, but the Group D which means the continental and microthermal climates at 6 kyr before present increased over 7%. Comparison between the results from the model simulation and published paleo-proxy record agrees within the limited sparse paleo-proxy record data.

关键词： paleoclimate modeling intercomparison project (PMIP) paleoclimate global warming,Asian continent.

Revealing the influence of in-situ formed LiCl on garnet/Li interface for dendrite-free solid-state batteries

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Journal of Energy Chemistry 2024年第5期92卷 394-403页

作者： Seoyoon shin Jinuk Lee Tae ho shin Seokhee Lee Hydrogen Energy Materials Center Korea Institute of Ceramic Engineering&TechnologyJinju-siGyeongsangnam-do 52851Republic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoul 03722Republic of Korea

Inadequate interfacial contact between lithium and solid-state electrolytes(SSEs)leads to elevated impedance and the growth of lithium dendrites,presenting significant obstacles to the practical viability of solid-state batteries(SSBs).To ameliorate interfacial contact,optimizing the surface treatment of SSEs has been widely ***,the formation of LiCl through acid treatment,an equally crucial factor impacting SSB performance,has received limited attention,leaving its underlying mechanism *** study aims to shed light on SSE characteristics following LiCl formation and the removal of Li_(2)CO_(3) through acid *** seek to establish quantifiable links between SSE surface structure and SSB performance,focusing on interfacial resistance,current distribution,critical current density(CCD),and lithium *** formation of LiCl,occurring as Li_(2)CO_(3) is removed through acid treatment,effectively mitigates lithium dendrite formation on SSE *** action inhibits electron injection and reduces the diffusion rate of Li ***,acid treatment transforms the SSE surface into a lithiophilic state by eliminating surface Li_(2)CO_(3).Consequently,the interfacial resistance between lithium and SSEs substantially decreases from 487.67 to 35.99Ωcm^(2) at 25°*** leads to a notably high CCD of 1.3 mA cm^(-2) and a significantly extended cycle life of 1,000 ***,in full SSBs incorporating LiCoO_(2)cathodes and acid-treated garnet SSEs,we observe exceptional cyclability and rate *** findings highlight that acid treatment not only establishes a fundamental relationship between SSE surfaces and battery performance but also offers an effective strategy for addressing interfacial challenges in SSBs.

关键词： Solid-statebatteries Acidtreatment Interfacial stability LiCl Surface modification