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송인섭 ( In Sub Song ),정미경 ( Mi Kyung Chung ),김효원 ( Hyo Won Kim ),최영미 ( Young Mi Choi ) 한국아동교육학회 2011 아동교육 Vol.20 No.3
The purpose of this study is 1) to define the concept of the career maturity: 2) to develop and validate the scale of career maturity for elementary school students. In order to answer these purposes, we first reviewed related documents and inventories, as to research the constructed factors which to develop an career maturity scale, then defined the concept of career maturity and the theological constructive model. The were included in 2 components of attitude and cognitive abilities for career maturity accordingly in 6 sub-components 195 elementary school students were analysed at pilot test and 1010 students were conducted final test. Based on factor analysis and item analysis, 77 items were selected to final test items. And this scale was validated through the evidence based on internal structure. Significance, limitations, and future research directions were discussed.
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박일수(Park, Il-Soo),장유운(Jang, Yu-Woon),하상섭(Ha, Sang-Sub),장수환(Jang, Su-Hwan),정경원(Chung, Kyung-Won),김혜원(Kim, Hye-Won),김희선(Kim, Hee-Sun) 한국외국어대학교 중남미연구소 2016 중남미연구 Vol.35 No.2
콜롬비아 소가모스 지역에서 미세먼지 감축 시나리오를 TAPM 모델을 활용하여 도출하고 평가하였다. 시나리오 1의 제철소 및 금속 등 중공업 오염원을 대상으로 미세먼지 방지 기술을 이용하여 배출량을 80% 감축하는 방안에서는 도시 중심 평균 농도는 6.5 μg m-3로 1.5 % 감소하였고, 모델영역에서 최고 평균농도는 387 μg m-3 로 변동 없었다. 시나리오 2의 벽돌 및 석회공장 등을 대상으로 연료를 석탄에서 코크스로 교체하여 90 % 감축하는 방안에서는 도시 중심 평균 농도는 4.5 μg m-3로 31.8%, 모델영역에서 최고 평균농도는 111 μg m-3 로 71.6 % 감소하였다. 시나리오 1과 시나리오 2를 결합한 시나리오 3에서는 도시 중심에서 평균 농도는 4.3 μg m-3로 34.8 %, 모델영역에서 최고 평균농도는 110 μg m-3 로 71.7 % 감소하였다. 소가모스 지역에서 대기환경을 개선하는 로드맵 수립에는 수공업에서 주로 사용되는 석탄 연료를 청정연료인 코크스로 교체하는 방안이 최우선으로 고려되어야 하겠다. 이후 미세먼지 방지 시설을 굴뚝에 설치하는 방안도 차선책으로 고려하여 환경과 경제가 선 순환하는 녹색성장관점에서 장기적인 미세먼지 개선 마스터 플랜이 수립되어야 하겠다. Reduction scenarios for PM10 concentration in Sogamoso, Colombia were analyzed using the TAPM( The Air Pollution Model). The average concentration of PM10 in the downtown area was 6.5 μg m-3, a reduction of 1.5 %. The maximum average concentration in the model domain was 387 μg m-3 without any reduction in scenarios 1 which the PM10 emissions from heavy industries such as iron and metal was reduced by 80 % using the prevention technology. In scenario 2 which the PM10 emissions from the brick and lime industries was reduced by 90 % substituting coke (a cleaner fuel) for coal, the average concentration of PM10 in the downtown area was 4.5 μg m-3, a reduction of 31.8 % , the maximum average concentration in the model domain was 111 μg m-3 , a reduction of 71.6 %. In scenario 3 which the scenarios 1 and 2 were combined, the average concentration of PM10 in the downtown area was 4.3 μg m-3, a reduction of 34.8 % and the maximum average concentration was 110 μg m-3, a reduction of 71.7 %. To put forward a road map for the reduction of PM10 in the Sogamos region, substituting coke for coal in manual industries should have priority over reduction policies. Also, it is highly recommended that a longterm master plan for reducing PM10 concentrations should be established with a focus on environmentally-friendly development and future green growth policy with a win-win relationship between economy and environment.
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Zr-V-Mn-Ni계 라브스상 합금의 미세 구조와 전기 화학적 특성
정치규(Chi Gyu Jeong),한동수(Dong Soo Han),정원섭(Won Sub Chung),김인곤(In Gon Kim),김원백(Won Baek Kim) 한국수소및신에너지학회 1997 한국수소 및 신에너지학회논문집 Vol.8 No.3
ZrV<sub>0.1</sub>Mn<sub>0.7</sub>Ni<sub>1.2</sub> alloy ingot (bulk alloy) made by the arc melting was found to be consisting of mostly of ZrV<sub>0.2</sub>Mn<sub>0.98</sub>Ni<sub>1.04</sub> matrix alloy and ZrV<sub>0.01</sub>Mn<sub>0.13</sub>Ni<sub>1.2</sub> 2nd phase alloy. The former alloy had the form of the C15 type Laves alloy structure and the latter one had the intermetallic compound structure of Zr<sub>9</sub>sNi<sub>11</sub>. In order to investigate the effect of these two phases on the electrochemical charge-discharge characteristics of bulk ZrV<sub>0.1</sub>Mn<sub>0.7</sub>Ni<sub>1.2</sub> alloy, the matrix and the 2nd phase alloys were fabricated separately by arc melting method and their electrochemical characteristics were studied and compared with the bulk alloy. It was found that the discharge capacity was the lowest of 160 mAh/g in the 2nd phase alloy. The matrix alloy exhibited 200 mAh/g. Both were lower than that of the bulk alloy of 250 mAh/g. The matrix and the bulk alloys showed a similar properties in the activation stage, the high rate dischargeability and the self discharge characteristics. Also a signigicant capacity decrease was observed after activation in both alloys. Whereas the 2nd phase alloy showed the very different characteristics. This alloy was found to be difficult to activate. However the capacity was remained constant after the activation. Also the self discharge rate was seen to be better than those of the matrix and the bulk alloys.
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Rho, Won-Yeop,Kim, Ho-Sub,Chung, Woo-Jae,Suh, Jung Sang,Jun, Bong-Hyun,Hahn, Yoon-Bong Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.429 No.-
<P><B>Abstract</B></P> <P>We have investigated the effect of TiO<SUB>2</SUB> nanoparticles/TiO<SUB>2</SUB> nanotubes-Ag nanoparticles (TiO<SUB>2</SUB>NPs/NTs-Ag@TiO<SUB>2</SUB> NPs) composites on the performance of dye-sensitized solar cells (DSSCs). The DSSC showed the power conversion efficiency (PCE) of 8.04% with TiO<SUB>2</SUB> NPs film only and 8.78% with TiO<SUB>2</SUB> NPs/NTs due to the improvement of electron transport through nanotubes. More interestingly, compared to the device with TiO<SUB>2</SUB> NPs film only, the TiO<SUB>2</SUB> NPs/NTs-Ag@TiO<SUB>2</SUB> NPs composites led to dramatic increases in <I>J<SUB>sc</SUB> </I> from 12.46 to 16.46mA/cm<SUP>2</SUP> (i.e., 32% increase) and PCE from 8.04 to 10.60% (i.e., 32% increase), attributed to a synergetic effect of fast electron conduction through TiO<SUB>2</SUB> NTs and plasmonic enhancement of Ag NPs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Composites composed of TiO<SUB>2</SUB> nanoparticles/nanotubes and Ag@TiO<SUB>2</SUB> nanoparticles for dye-sensitized solar cells (DSSCs). </LI> <LI> Dramatic increase in photocurrent density and power conversion efficiency with the composite-based DSSCs. </LI> <LI> A synergetic effect of fast electron conduction through TiO<SUB>2</SUB> NTs and plasmonic enhancement of Ag NPs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Ko, Young-Dae,Kang, Jin-Gu,Choi, Kyung Jin,Park, Jae-Gwan,Ahn, Jae-Pyoung,Chung, Kyung Yoon,Nam, Kyung-Wan,Yoon, Won-Sub,Kim, Dong-Wan Royal Society of Chemistry 2009 Journal of materials chemistry Vol.19 No.13
<P>Two-dimensional (2-D) nanoplates of iron-substituted calcium cobaltite (Ca<SUB>3</SUB>Co<SUB>3</SUB>FeO<SUB>9</SUB>) are synthesized through a simple citrate-gel method. The lithium electroactivity of Ca<SUB>3</SUB>Co<SUB>3</SUB>FeO<SUB>9</SUB> demonstrates that this is an applicable active anode material. In this study, we focus on the reversible conversion process and internally multi-phasic, nanostructured character occurring in Ca<SUB>3</SUB>Co<SUB>3</SUB>FeO<SUB>9</SUB> nanoplates. Moreover, we demonstrate that in-situ formation of active/inactive nanocomposite improves the conversion reaction kinetics by accommodating the large volume changes during lithium uptake and removal, thereby achieving outstanding rate capabilities.</P> <P>Graphic Abstract</P><P>Two-dimensional nanoplates of iron-substituted calcium cobaltite (Ca<SUB>3</SUB>Co<SUB>3</SUB>FeO<SUB>9</SUB>) synthesized through a simple citrate-gel method are found to be an active anode material. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b817120c'> </P>
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