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TiO<sub>2</sub>/Cu<sub>x</sub>O (1<x<2)의 광촉매 활성 및 항균작용
조성우,이용임,김이한,정동운,Cho, Sungwoo,Lee, Yong-Im,Kim, Lee-Han,Jung, Dongwoon 대한화학회 2013 대한화학회지 Vol.57 No.4
$CuCl_2$로부터 용액합성법에 의해 CuO를 제조하였다. $CuCl_2$를 용액에 첨가하기 전에 용액내에 anatase형 $TiO_2$ 입자를 분산시켜 CuO가 형성되는 과정에서 $TiO_2$/CuO 결합입자를 합성하였다. 얻어진 $TiO_2$/CuO에 적당량의 글루코스를 가하여 반응시켜 CuO의 일부를 $Cu_2O$로 환원시켰다. 얻어진 시료 $TiO_2/Cu_xO$ (1<x<2) 복합체의 광특성, 광촉매 활성 및 항균작용에 대하여 실험하였다. 얻어진 $TiO_2/Cu_xO$ 복합체는 anatase와는 다르게 가시광선 전 영역에서 흡광이 발생했으며 당연한 결과로 태양광선에서 $TiO_2/Cu_xO$ 복합체의 광촉매 활성은 anatase $TiO_2$에 비하여 매우 뛰어난 것으로 나타났다. 또한 $TiO_2/Cu_xO$ 복합체의 항균성이 대단히 뛰어난 것으로 나타났다. Copper oxide (CuO) was synthesized from $CuCl_2$ by solution method. Anatase $TiO_2$ particle was dispersed into the solution before preparing CuO, so that $TiO_2$/CuO heterojunction was created through the nucleation of CuO onto the $TiO_2$ surface. Some amount of CuO was reduced to $Cu_2O$ by treating glucose into the solution, thereby preparing $TiO_2/Cu_xO$ complex. The obtained $TiO_2/Cu_xO$ complex showed advanced phtocatalytic activity under the sun light compared with the P-25 sample. In addition, the the $TiO_2/Cu_xO$ complex showed excellent antipathogenic effect.
조성우(Sungwoo Cho) 한국공공정책학회 2006 공공정책연구 Vol.21 No.-
본 논문에서는 부산항의 물류단지화를 하기위해 필요한 항만배후공간의 현황과 문제점 그리고 효율적 이용방안에 대해서 살펴보고 물류단지화에 따른 지역경제효과를 분석하였다. On-Dock Terminal이 시행된 경우, 2000년 기준 컨테이너 터미널 사용료의 절감액은 무려 430억원에 달하며, 이는 수출입화물 해상운임의 0.33% 및 수출입 금액의 0.011%에 상당하는 것으로 분석되었다. 또한 이러한 터미널 사용료의 절감은 부산지역의 전체산업의 0.1255%의 평균적인 가격인하 효과를 유발하며, 직접적인 생산 증가액은 약 1,260억원으로 추정되었으며, 직?간접적으로 유발되는 모든 생산유발액은 1,912억원으로 추정되었다. 또한 부산지역의 부가가치 유발효과는 전체 1,260억원이며, 제1차금속이 4.811874로 가장 높게 나타났다. On-Dock Terminal로 인한 직?간접적 고용유발효과는 ODCY 폐쇄에 따라 상당 부분 상쇄될 것으로 예상되고 있어 순고용 유발은 상대적으로 적을 것으로 예상되었다. The purpose of this study is to present the development of logistics center and the regional economic effects in Busan Port, Korea. This paper is mainly based on the analysis of secondary & survey data and a review of the research reports and papers. Section three attempts to investigate the actual conditions and the problems of the hinterland in Busan Port. Development strategies of logistics center in the hinterland and the solution to the problems are presented in section four. The regional economic effects are identified in the fifth section and the regional input-output model is used to analyze the economic structure of Busan . The port is the place of contact between land and maritime spaces, and it provides services to both hinterland and maritime organization. Its primary function is to transfer goods vessels to land or to inland carriers, and vice versa. Recently, the volume of transshipment cargo has increased rapidly in Busan port. To this end, better integrated logistic center should be constructed within the hinterland of Busan port. The method of effective development in the hinterland as follow : First, One story bonded warehouse located in general pier must be reconstructed high tech and high storied logistic center like singapore or hong-kong. Second, the system should be changed to use easily exclusive pier(pier 8) of the U.S. Armed Forces in Korea when the U.S. navy transport ship doesn"t be in pier 8. Third, Yong-Dang area have to be developed the hinterland in Busan port. It will be a great help to solve the insufficient container yard and make up for the weak logistic function. There are some regional economic effect in case of achieving the logistic center. The most typical thing is to be introduced On-Dock Terminal. It can be cut down terminal handling charge, changed goods rate and the price of exportation and importation. In the end, Busan port"s ranking will rise in global competitiveness.
조성우(Sungwoo Cho),유승진(Seungjin Yoo),박철규(Cheol-Gyu Park) 대한기계학회 2015 大韓機械學會論文集A Vol.39 No.2
환경 문제 및 화석연료 고갈에 대한 관심으로 인하여 배기가스에 대한 규제는 나날이 엄격해지고 있으며 높은 연비에 대한 수요는 지속적으로 증가하고 있다. 이러한 시대적 요구를 뒷받침하기 위하여 저배기-고연비가 특징인 하이브리드 굴삭기가 현실적인 대안으로서 각광받고 있으며 지속적으로 연구되고 있다. 본 연구에서는 선회 구동 전동기, 엔진보조 전동기, 울트라 캐패시터, 전력변환장치를 중형 굴삭기에 탑재한 복합형 하이브리드 굴삭기를 개발하였으며, 일반적인 복합형 하이브리드 굴삭기의 연비개선요소(선회 구동 에너지 회생, 엔진 작동 속도 변경)외에 추가적으로 적용된 연비개선 방법론들에 대하여 다루고 있다. 본 방법론들을 적용함으로써 연비와 운전 조작성을 동시에 개선할 수 있었다. Emission gas regulations and constantly increasing fuel costs call for the worldwide use of environmentally friendly and energy-efficient machines in industry. To meet these requirements, a hybrid excavator prototype has been developed that incorporates an electric swing motor, engine assist motor, and ultra-capacitor module into a conventional hydraulic excavator of the 22-ton class. This paper mainly describes a few techniques to optimize its energy efficiency. These include 1) controlling the engine speed in proportion to the load torque, 2) controlling the pump displacement when driving the electric swing system, 3) managing the ultra-capacitor voltage to minimize the electrical energy loss, and 4) reducing the cooling fan speed to improve the energy efficiency of the system.
조성우(Sungwoo Cho),유성은(Seongeun Yu),정대봉(Daebong Jung),민경덕(Kyungdoug Min) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This research focused on analysis of energy flow in parallel hybrid electric vehicle system. Hybrid Powertrain system includes much more equipment than conventional system, so it is not easy to pick up the point which causes low system efficiency. By calculating from chemical energy of fuel to kinetic energy delivered on wheel, however, energy flow chart can be diagramed. And conversion efficiency computed with this chart can help researchers to know which step caused more energy loss than expected. CAN is used as data acquisition method, as it is more brief way to get the driving parameter than any other method in chassis test situation. Most of all, CAN communicates real driving parameter which is used in ECU communication, it would be the most reasonable method in analyzing energy flow.
마일드 하이브리드 차량에서 배터리 SoC에 따른 엔진의 작동효율 분석
조성우(Sungwoo Cho),정대봉(Daebong Jung),유성은(Seongeun Yu),민경덕(Kyungdoug Min) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This research focuses on the effects engine operating efficiency between battery SoC level in mild type hybrid electric vehicle. Although Hybrid electric power train system has been highlighted with potentials in low fuel consumption and exhaust gas emission, it is not easy matter to actualize these strengths. Hybrid electric power train system includes both engine system and electric system, so it is inevitable thing to optimize two different kinds of systems for ideal results. In this research, chassis driving test was conducted in different initial battery SoC condition. Based on experimental data, relation between engine efficiency and battery SoC was analyzed.