비정질 루테늄 산화물을 사용한 수계 Supercapacitor의 전기화학적 특성

최상진,도칠훈,문성인,윤문수,육경창,김상길,Choi, Sang-Jin,Doh, Chil-Hoon,Moon, Seong-In,Yun, Mun-Su,Yug, Gyeong-Chang,Kim, Sang-Gil 한국전기화학회 2002 한국전기화학회지 Vol.5 No.1

비정질 루테늄 산화물을 사용한 수퍼캐패시터를 개발하였다. 삼염화루테늄 수화물$(RuCl_3{\cdot}xH_2O)$로부터 제조한 비정질의 이산화루테늄 수화물$(RuO_2{\cdot}nH_2O)$을 사용하여 수퍼캐패시터 전극을 제조하였다. 집전체로는 티타늄 및 STS 304박막에 비해 보다 넓은 전위창을 가지는 탄탈륨 박막을 사용하였다. 제조한 전극과 4.8M 황산 전해액을 사용하여 수퍼캐패시터를 제조하였다. 전극의 비정전용량은 순환전위전류분석에서 미분 최대 값으로 산화 및 환원 과정 각각 710 및 $645\;F/g-RuO_2{\cdot}nH_2O$이었으며, 평균값은 $521\;F/g-RuO_2{\cdot}nH_2O$으로 나타났다. 수퍼캐패시터를 포화카로멜기준전극에 대하여 0.5 V로 protonation level을 조정하고, 충방전 시험한 바, $151\;F/g-RuO_2{\cdot}nH_2O$의 비정전용량을 나타내었다. A supercapacitor was developed using an amorphous ruthenium oxide material. The electrode of supercapacitor was prepared using an amorphous ruthenium oxide, which was synthesized from ruthenium trichloide hydrate$(RuCl_3{\cdo5}xH_2O)$. Thin film of tantalum was used as a current collector because it had wide. potential window characteristics than titanium and 575304 materials. A supercapacitor was assembled with ruthenium oxide as an electrode active material and 4.8M sulfuric acid solution as an electrolyte. The specific capacitance of the electrode was tested by a cyclic voltammetry using a half cell. The maximum differential specific capacitances during the oxidative and the reductive scans were 710 and $645\;F/g-RuO_2{\cdot}nH_2O$, respectively. The average specific capacitance was $521\;F/g-RuO_2{\cdot}nH_2O$. The assembled supercapacitor was protonated to the potential level of 0.5V vs. SCE. Super-capacitor, which was adjusted to the appropriate protonation level, had the specific capacitance of $151\;F/g-RuO_2{\cdot}nH_2O$ based on the concept of full cell.

가변 페브리-페로 필터와 FBG를 이용한 광세기 기반 자기기준 광섬유 센서

최상진,반재경,Choi, Sang-Jin,Pan, Jae-Kyung 대한전자공학회 2013 전자공학회논문지 Vol.49 No.11

본 논문에서는 자기기준 특성을 가지는 광세기 기반 광섬유 센서 구조를 제안하고 실험적으로 구현하여 성능을 제시한다. 제안하는 광섬유 센서는 광대역 광원(BLS), fiber Bragg grating (FBG), 가변 페브리-페로(Fabry-Perot) 필터, LabVIEW 프로그램으로 구성된다. 제안한 자기기준 광섬유 센서의 이론적인 해석을 통하여 측정 변수(X)와 보정 변수(${\beta}$)를 정의하고, 이를 바탕으로 전달함수(H)를 구한다. 또한 실험을 통하여 이론적인 해석의 타당성을 제시한다. 제안한 광섬유 센서 구조는 광대역 광원의 출력 광세기가 0 dB, 3 dB, 6 dB 감소해도 측정결과에 영향을 미치지 않는 자기기준 특성을 가진다. 또한 다른 특성의 FBG를 사용하여도 측정 가능하므로, 제안한 광섬유 센서 구조는 임의의 규격을 가진 FBG를 사용할 수 있다. 광원의 광세기가 감소하였을 때와 세 가지 다른 특성의 FBG 쌍을 이용하여 측정한 결과 이론적인 값과 잘 일치함을 보였다. 따라서 제안한 광섬유 센서는 자기기준 특성과 구성하는 FBG의 규격이 비교적 엄격하지 않아도 되는 장점을 가진다. In this paper, we have proposed and experimentally demonstrated an intensity-based self-referencing fiber optic sensor. The proposed fiber optic sensor consists of a broadband light source (BLS), fiber Bragg grating (FBG), tunable Fabry-Perot (F-P) filter, and LabVIEW program. We define the measurement parameter (X) and the calibration parameter (${\beta}$) to determine the transfer function(H) of the self-referencing fiber optic sensor, and the validity of the theoretical analysis is confirmed by experiments. The self-referencing characteristic for the proposed system has been validated by showing that the measurement parameter (X) is invariant for BLS optical power attenuations of 0 dB, 3 dB, and 6 dB. Also, the measured result is irrelevant to the FBGs with different characteristics. This means that the proposed fiber optic sensor offers the flexibility for determining the FBGs needed for implementation. Experimental results for the proposed fiber optic sensor are in good agreement with a theoretical analysis for BLS optical power attenuations and for three FBG pairs with different characteristics. So, the proposed fiber optic sensor has several benefits, including the self-referencing characteristic and the flexibility to determine the FBGs.

정비구역내 거주민들의 주거환경만족도와 정비사업에 대한 의식 및 의향에 관한 연구

최상진(Choi, Sang-Jin),김한수(Kim, Han-Soo) 한국주거학회 2020 한국주거학회 논문집 Vol.31 No.1

The purpose of this study was to measure the consciousness of residential environment improvement project for residents living in maintenance area. Based on this, I would like to help the data to clarify the contents to be considered in the future residential environment improvement project. For the analysis, we surveyed the residential environment satisfaction level and the residential environment satisfaction level by individual attribute for the residents in the current residential environment maintenance area. In addition, this study examined the interest in the maintenance business and the intention to resettle. In summary, the relationship between resettlement intention after completion of maintenance project and recognition of maintenance project was found to be resettlement as the overall understanding of the maintenance project and the general awareness of the project, such as whether to attend the information session or training. Thus, this study revealed that residential rearrangement projects in locations covering metropolitan areas and their suburb areas have positive impact on resolution of the doughnut effect and supply of houses based on the overall analysis of procedures implemented for areas in Daegu which were legally designated to be rearranged as part of the administrative effort to improve residential environment and secure houses and investigation of public awareness for residents living in such areas.

정렬 반얀망을 이용한 고속 스위치 설계

최상진(Sang-Jin Choi),권승탁(Seung-Tag Kwon) 대한전자공학회 2001 대한전자공학회 학술대회 Vol.2001 No.6

정비구역내 거주민의 의식에 관한 연구

최상진(Choi, Sang-Jin),김한수(Kim, Han-Soo) 한국주거학회 2019 한국주거학회 학술대회논문집 Vol.31 No.2

가변 페브리-페로 필터와 FBG를 이용한 광세기 기반 자기기준 광섬유 센서

최상진(Sang-Jin Choi),반재경(Jae-Kyung Pan) 대한전자공학회 2013 전자공학회논문지 Vol.50 No.3

본 논문에서는 자기기준 특성을 가지는 광세기 기반 광섬유 센서 구조를 제안하고 실험적으로 구현하여 성능을 제시한다. 제안하는 광섬유 센서는 광대역 광원(BLS), fiber Bragg grating (FBG), 가변 페브리-페로(Fabry-Perot) 필터, LabVIEW 프로그램으로 구성된다. 제안한 자기기준 광섬유 센서의 이론적인 해석을 통하여 측정 변수(Χ)와 보정 변수(β)를 정의하고, 이를 바탕으로 전달함수(Η)를 구한다. 또한 실험을 통하여 이론적인 해석의 타당성을 제시한다. 제안한 광섬유 센서 구조는 광대역 광원의 출력 광세기가 0 dB, 3 dB, 6 dB 감소해도 측정결과에 영향을 미치지 않는 자기기준 특성을 가진다. 또한 다른 특성의 FBG를 사용하여도 측정 가능하므로, 제안한 광섬유 센서 구조는 임의의 규격을 가진 FBG를 사용할 수 있다. 광원의 광세기가 감소하였을 때와 세 가지 다른 특성의 FBG 쌍을 이용하여 측정한 결과 이론적인 값과 잘 일치함을 보였다. 따라서 제안한 광섬유 센서는 자기기준 특성과 구성하는 FBG의 규격이 비교적 엄격하지 않아도 되는 장점을 가진다. In this paper, we have proposed and experimentally demonstrated an intensity-based self-referencing fiber optic sensor. The proposed fiber optic sensor consists of a broadband light source (BLS), fiber Bragg grating (FBG), tunable Fabry-Perot (F-P) filter, and LabVIEW program. We define the measurement parameter (Χ) and the calibration parameter (β) to determine the transfer function(Η) of the self-referencing fiber optic sensor, and the validity of the theoretical analysis is confirmed by experiments. The self-referencing characteristic for the proposed system has been validated by showing that the measurement parameter (Χ) is invariant for BLS optical power attenuations of 0 dB, 3 dB, and 6 dB. Also, the measured result is irrelevant to the FBGs with different characteristics. This means that the proposed fiber optic sensor offers the flexibility for determining the FBGs needed for implementation. Experimental results for the proposed fiber optic sensor are in good agreement with a theoretical analysis for BLS optical power attenuations and for three FBG pairs with different characteristics. So, the proposed fiber optic sensor has several benefits, including the self-referencing characteristic and the flexibility to determine the FBGs.

대학교 학생선수의 수업참여도와 진로결정 효능감 간의 관계 및 운동종목에 따른 조절효과 분석

최상진(Choi, Sang-Jin),박수근(Park, Soo-Keun) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.1

The purpose of this study was to investigate a study on the moderating effect between class participation and career decision efficacy of college student athletes according to sports event. The subjects of this study were collected 331 of college player who are belong to the department of physical education in Gyeoggi Province and Seoul area. The survey questionnaires were used to collect the data. The collected material was carried out by using Spss 18.0 version. The questionnaires for the class participation scale had been developed by Kim(2016) and Jang(2013), and career decision efficacy scale had been developed by Taylor & Bets(1983), Lee(2004), and Kim(2013). From the analyses of the data, the study reached the following conclusions. The research hypothesisⅠwas partially established, More details, Class interest affected the efficacy of career decisions, and the attitude of participation affected the efficacy of career decisions. The research hypothesis Ⅱwas partially established. More details, Interventions of sports events showed the interaction between classes and career determination efficacy. The interactive effects of classroom interest and the interaction of sports events were reflected in the collection of vocational information among the lower factors of career decision efficacy. The interactive effects of the participatory attitude and the exercise of sports events appeared in self-evaluation among the lower factors of career decision efficacy.

국내외 CO₂ 저감 및 처리 기술개발 정책동향 분석

최상진(Sang-Jin Choi),이덕기(Deok-Ki Lee),박수억(Soo-Uk Park) 한국기술혁신학회 2003 기술혁신학회지 Vol.6 No.4

기술시장 자격제도의 실태에 관한 연구

최상진(Sang-Jin Choi),이덕기(Deok-Ki Lee),박수억(Soo-Uk Park) 한국기술혁신학회 2003 기술혁신학회지 Vol.6 No.3

정비구역내 거주민들의 주거환경만족도에 관한 연구

최상진(Choi, Sang-Jin),김한수(Kim, Han-Soo) 한국주거학회 2019 한국주거학회 학술대회논문집 Vol.31 No.1