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형태학적 영상처리를 이용한 어체 측정 시스템 개발에 관한 연구
이동길 ( Dong Gil Lee ),양용수 ( Yong Su Yang ),김성훈 ( Seong Hun Kim ),최정화 ( Jung Hwa Choi ),강준구 ( Jun Gu Kang ),김희제 ( Hee Je Kim ) 한국어업기술학회 2012 수산해양기술연구 Vol.48 No.4
To manage, sort, and grade fishery resources, it is necessary to measure their morphometric characteristics. This labor-intensive task involves performing repetitive operations on land and on a research vessel. To reduce the amount of labor required, a vision-based automatic measurement system (VAMS) for the measurement of morphometric characteristics of flatfish, such as total length (TL), body width (BW), and body height (BH), has been developed as part of a database management system for fishery resources management. This system can also measure the mass (M) of flatfish. In the present study, we describe a morphological image processing algorithm for the measurement of certain characteristics of flatfish. This algorithm, which involves preprocessing, edge pattern matching, and edge point detection, is effective in cases where the flatfish being measured has a deformed tail and is randomly oriented. The satisfactory performance of the proposed algorithm is also demonstrated by means of experiments involving the measurement of the BW, TL and BH of a flatfish when it is straightened (BW:117mm, TL:329mm, BH: 24.5mm), when its tail is deformed, and when it is randomly oriented.
Xenon flashlamp와 광촉매를 이용한 타원형 반응기의 살균 특성에 관한 연구
이동길(Dong-Gil Lee),홍지태(Ji-Tae Hong),최경화(Kyoung-Hwa Choi),차재호(Jaeho Cha),김홍주(Hong-Ju Kim),김희제(Hee-Je Kim) 대한전기학회 2009 전기학회논문지 Vol.58 No.3
In this paper, we invented a new and unique technique for the sterilization of Escherichia coli(E. coli) in polluted water. We applied a rich ultra-violet(UV) light from pulsed xenon flashlamp and photocatalyst(TiO₂) to sterilize E. coli in polluted water. This method based on the use of UV light and photocatalyst is eco-friendly and does not cause secondary pollution. The proposed elliptical reactor is able to concentrate on quartz sleeve coated TiO₂ or general quartz sleeve. The primary objective of our research was to determine the important parameters such as pulse repetition rate and input voltage and to know on the sterilizing efficiency of quartz sleeve coated TiO₂ and general quartz sleeve. We obtained to achieve 99.999% sterilization in as little as 6 pulses at 800 V in case of quartz sleeve coated TiO₂, and 10 pulses at 800 V in case of general quartz sleeve for 5 minutes. Although transmitted light of quartz sleeve coated TiO₂ is deceased, the sterilizing efficiency is increased by 40% than general quartz sleeve. The reason of high sterilizing efficiency is that generated hydroxyl radical(OH) by photocatalyst and is able to concentrate light at a focus by using elliptical reactor.
이동길(Lee, Dong-Gil),윤순진(Yun, Sun-Jin) 서울행정학회 2016 한국사회와 행정연구 Vol.27 No.2
2015년 파리에서 있었던 UNFCCC COP-21에서는 신기후체제 마련을 합의하였는데, 2014년의 리마합의문에 따라 UNFCCC 회원국들은 온실가스 감축목표를 포함한 국가별 기여방안(INDC)을 총회가 열리기 전인 2015년 10월 1일까지 제출해야 했다. 이 연구에서는 다양한 선행연구에 대한 검토를 통해 분석틀을 설정한 후 한국의 INDC 수립과정의 거버넌스를 분석했을 뿐 아니라 거버넌스 분야에서 높은 평가를 받고 있고 국가 단위 배출권 거래제를 시행하는 유사성을 가진 뉴질랜드와의 비교검토를 수행하였다. 연구 방법으로는 문헌조사, 참여관찰, 심층면접을 활용하였다. 연구 결과, 한국 정부가 민관합동검토반을 장기간 운영하였다는 점은 긍정적인 부분이었으나, 감축목표 안 공개 이후 의견 수렴 방식은 상당히 미흡한 것으로 나타났다. 이러한 문제점은 뉴질랜드와의 비교에서 더욱 뚜렷이 확인할 수 있었다. 이후 기후변화 거버넌스에 있어서는 다음과 같은 개선이 필요하다: 첫째, 민관합동검토반 운영 자체는 바람직했지만 앞으로는 정보를 더 투명하게 공개해야 한다; 둘째, 보다 다양한 사회구성원들로부터 의견 수렴이 이루어져야 한다; 셋째, 여론 수렴 결과 반영 여부에 대해 뉴질랜드에서처럼 따로 문서를 발간하여 보다 상세히 공개할 필요가 있다; 넷째, 공론화 단계에서 전제조건, 배출전망, 분석모형과 관련한 자료를 폭넓게 공개해야 한다. The 2015 UNFCCC COP-21 in Paris laid foundations for a new climate change agreement and according to the 2014 Lima Agreement, UNFCCC member states were required to submit INDCs that include greenhouse gas emissions reduction goals on October 1st, 2015, before COP-21. This study analyzes the governance of the process of formation of Korea"s INDC and compares it with the case of New Zealand which has similarities to Korea in its implementation of a national emissions trading scheme and is highly recognized in the field of governance. The analysis framework of the study was selected prior to the analysis through the review of various previous literature. The research methodology includes literature research, participant observation and in-depth interviews. The results of the study show that although the Korean government"s long-term operation of the public-private joint review team was a positive aspect, its methods of collecting opinions after disclosing the emissions reduction goal was quite insufficient. This issue is made more distinct through comparison with New Zealand. The following improvements are necessary for future climate change governance: first, although the operation of the public-private joint review team was a desirable aspect, information must be made more transparent in the future; second, the collection of opinions from more diverse members of society must be made possible; third, after collecting public opinion, the inclusion of the opinion must be made more public by publishing a document; fourth, in the stages of publicizing information, documents related to the preconditions, emission projections and analysis model should be widely disclosed to the public.
자동차 밸브용 강재의 봉대봉 이종마찰용접부의 피로수명에 관한 연구
이동길(Dong-Gil Lee),이상열(Sang-Ryoul Lee),정재강(Jae-Kang Chung) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
The fatigue crack propagation behavior was tested with STR3, martensite stainless steel, and STR35, austenite stainless steel, to look over the fatigue properties on the friction welding zone according to the small artificial defect positions. From the experiment, the fatigue limits of the STR3 and STR35 base metal were 429.0㎫ and 409.4㎫ respectably. The fatigue lifes of the STR35 specimens showed about 190% for base metal specimen, about 82% for 1.0㎜ HAZ specimen higher than that of the STR3. To the contrary, the fatigue life of the STR35 specimens showed about 35% for 0.5㎜ HAZ specimen lower than that of the STR3. And the fatigue life of weld interface specimen was much lower than that of the other specimens.