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Multi-Walled Carbon Nanotubes (MWCNT) 인쇄박막의 제작과 화학센서 동작 특성에 관한 연구
노재하,최준석,고동완,서준영,이상태,정정열,장지호,Noh, Jae Ha,Choi, Junseck,Ko, Dongwan,Seo, Joonyoung,Lee, Sangtae,Jung, Jung-Yeul,Chang, Jiho 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.3
Hazardous and noxious substance (HNS) detection sensors were fabricated using multi-walled carbon nanotubes (MWCNTs) and various binder materials for ion batteries. To obtain uniformly printed films, the printing precision according to the substrate cleaning method was monitored, and the printing paste mixing ratio was investigated. Binders were prepared using styrene butadiene rubber + carboxymethyl cellulose (SBR+CMC), polyvinylidene fluoride + n-methyl-2-pyrrolidene (PVDF+NMP), and mixed with MWCNTs. The surface morphology of the printed films was examined using an optical microscope and a scanning electron microscope, and their electrical properties are investigated using an I-V sourcemeter. Finally, sensing properties of MWCNT printed films were measured according to changes in the concentration of the chemical under the various applied voltages. In conclusion, the MWCNT printed films made of (SBR+CMC) were found to be feasible for application to the detection of hazardous and noxious chemicals spilled in seawater.
공적개발원조(ODA)와 지역사회개발에서 사회적 자본과의 관계 : 배태성과 자율성개념을 중심으로
박용순(Park, Yongsoon),고동완(Ko, Dongwan) 대한관광경영학회 2021 觀光硏究 Vol.36 No.2
Social capital is the main keyword that best describes the change in the ODA paradigm. Since the UN s SDGs were presented, the ODA project is looking at an endogenous development strategy that emphasizes the subjective role of the recipient country, out of effectiveness in the economic aspect of the donor country. This study applies Woolcock s concept of embeddedness and autonomy, which is examining social capital, and explores the construction of social capital from a micro, macro and an integrated perspective on the development of communities in ODA recipient countries. As a result, in the microscopic aspect, it is necessary to expand social capital through integration and connection among community members, In the macroscopic aspect, it is necessary to establish a system that can systematically support communities through the establishment of cooperative relations and provision of laws and systems. In addition, from an integrated perspective, the integration of community members from the bottom and support from the administration (central, local) from the top can promote sustainable endogenous development of the local community. The main contribution in this study is to share the doner country s development experience with the recipient country through a horizontal relationship as mutual partnership rather than the master-slave relationship between donation and recipient of ODA projects. Through this, social capital is being dealt with to enhance the effectiveness of the ODA project. In conclusion, in order for the ODA recipient country s local community development to achieve endogenous development, it will be possible to achieve results when the micro and macro aspects of social capital are complementary. 사회적 자본은 ODA 패러다임의 변화를 가장 잘 설명하는 주요한 키워드이다. UN의 SDGs가 제시된 이후 ODA사업은 공여국의 경제적 측면에서 효과성을 벗어나 수원국의 주체적인 역할을 강조하는 내생적 발전전략을 중요하게 바라보고 있다. 본 연구는 사회적 자본에 대해서 고찰하고 있는 Woolcock의 배태성과 자율성 개념을 적용하여 ODA 수원국의 지역사회개발에 대해서 미시적 관점과 거시적 관점, 그리고 통합적인 관점으로 사회적 자본의 확충에 대해서 탐구하고 있다. 논의결과, 미시적 측면에서는 공동체 구성원 간의 통합과 연계라는 과정과 결과로서 사회적 자본의 확충이 필요하다면, 거시적 측면에서는 협력적 관계구축과 법ㆍ제도의 마련을 통해 지역사회를 체계적으로 지원할 수 있는 체계의 마련이 필요하다. 또한 통합적 관점에서 지역사회 사회적 자본을 확충하기 위해서는 밑으로부터는 지역사회 구성원의 통합과 위로부터는 행정(중앙, 지방)의 지원이 지역사회의 지속가능한 내생적 발전을 도모할 수 있다. 본 연구에서의 주요한 기여는 ODA사업의 공여와 수원이라는 주종관계가 아니라 상호 파트너십으로서의 수평적 관계를 통해 공여국의 개발경험을 수원국과 공유하고, 이를 통해 ODA사업의 효과성을 제고하기 위해 사회적 자본을 다루고 있다는 것이다. 결국, ODA 수원국의 지역사회개발이 내생적 발전을 이루기 위해서는 사회적 자본의 미시적 측면과 거시적 측면이 상호 보완적으로 이루질 때 성과를 나타낼 수 있을 것이다.
서준영 ( Joonyoung Seo ),고동완 ( Dongwan Ko ),최준석 ( Junseck Choi ),노재하 ( Jaeha Noh ),정정열 ( Jung-yeul Jung ),이문진 ( Moonjin Lee ),이상태 ( Sangtae Lee ),장지호 ( Jiho Chang ) 한국센서학회 2020 센서학회지 Vol.29 No.1
An integrated multifunctional sensor, capable of raising an early electric-fire warning, was fabricated. An arc-light, temperature, and humidity sensor was fabricated on a flexible substrate using a printed thin film of indium tin oxide. A polyethylene terephthalate (PET) substrate was used as the flexible substrate. The sensor was fabricated on a PET substrate, and its operating characteristics were tested. The operating performances of the sensor when serving as an arc-light, a temperature, and a humidity sensor were estimated to be 0.6247 Ω/W, 80.6 Ω/K, and -4.08 Ω/RH, respectively. The feasibility of the proposed fire sensor was demonstrated; it costs low and offers multiple functionalities
NO<SUB>X</SUB> 및 CO 동시 저감 관군보일러 운전 기술 개발
권민준(Minjun Kwon),황제영(Je Young Hwang),고동완(Dongwan Ko),이상진(Sangjin Lee),한상후(Sanghu Han),김세원(Sewon Kim) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
This study aims to develop low NOx and CO technology in an industrial furnaceless boiler. The combustion chamber of a furnaceless boiler is very small, thus premixed flame with short flame length is required. In this study, the metal fiber burner system with premixing chamber is developed. The metal fiber burner showed different performances depending on the distribution of the fuel-air mixture. The distribution structure of the air-fuel mixture is optimized to achieve uniform fuel-air mixture. The catalyst is installed at the stack to reduce CO emission. The maximum load of the burner is 3.8MW and commercial LNG is used for fuel. The results showed that NOx concentration is 7.3ppm and CO concentration is 2ppm with catalyst at 7% flue gas O₂.