연구논문(硏究論文) : LiDAR를 활용한 국토환경성평가지도 산림부문 신규 평가항목의 도입 가능성 평가

전성우 ( Seong Woo Jeon ),홍현정 ( Hyun Jung Hong ),이종수 ( Chong Soo Lee ),이우균 ( Woo Kyun Lee ),성현찬 ( Hyun Chan Sung ) 한국환경복원기술학회 2007 한국환경복원기술학회지 Vol.10 No.5

위식도역류질환의 표현형과 렙틴은 상관성이 있는가

전성우 ( Seong Woo Jeon ),정민규 ( Min Kyu Jung ),이명훈 ( Myung Hoon Lee ),권중구 ( Joong Goo Kwon ) 대한소화기학회 2010 대한소화기학회지 Vol.56 No.1

Background/Aims: Obesity is associated with gastroesophageal reflux disease (GERD). Leptin is a hormone which controls appetite and energy homeostasis. Alterations of its level in humans have been linked with obesity and related carcinogenesis. We postulated that the leptin level in plasma or tissues might be different according to the phenotype of GERD. We evaluated this hormone in patients with non-erosive reflux disease (NERD) and reflux esophagitis (RE) with demographic characteristics to confirm the postulation. Methods: The patients with typical GERD symptoms such as acid regurgitation and heartburn were prospectively enrolled and evaluated. The demographic data included body mass index, waist circumference, smoking, and the consumption of coffee. Rapid urease test was done to evaluate the status of Helicobacter pylori infection. We measured plasma leptin level along with the tissue level, which was obtained from the fundus of stomach. Results: A total of 44 patients were evaluated (RE 20 cases, NERD 24 cases). No demographic data was different between the two groups, except waist circumference (mean 88.6 cm in RE, 80.9 cm in NERD, p=0.006), smoking (45% in RE, 12.5% in NERD, p=0.021) and coffee consumption (85% in RE, 50% in NERD, p=0.025). The level of plasma leptin was not different between the two groups. The level of tissue leptin was also not different between the two groups with an increasing tendency in RE (mean 32.5 ng/mL vs. 28.0 ng/mL in NERD). Conclusions: We could not find any association between plasma and tissue leptin levels and the phenotype of GERD. However, increasing tendency in RE could afford to further studies in near future. (Korean J Gastroenterol 2010;56:15-19)

빛의 파장에 따른 나도공단풀의 생육 비교

전성우 ( Seong-woo Jeon ),강대영 ( Dae-yeong Kang ),김나은 ( Na-eun Kim ),이명우 ( Myung-woo Lee ),김현태 ( Hyeon-tae Kim ) 한국농업기계학회 2022 농업기계공학 Vol.2 No.1

The purpose of this research is to find out the effect of different wavelengths on the growth of the Cuban jute (Sida rhombifolia L.). In this experiment, plants were grown in five chambers block for avoiding the role of sunlight during the growing period. To find out the effects of wavelengths on plants, we classified the light sources into 5 groups e.g., COB LED, full-spectrum LED, W2+R1, R2+B1, and R4+B1. The length and thickness of stem, number of leaves, and leaf area of plants were calculated using the equation of ellipse in order to observe the role of wavelength on growth. The wavelengths in this study were measured using a spectrometer and the range was found from 450 nm to 660 nm. The illuminance values were also measured using a light quantity meter to observe the effects on plant growth as well. The study found that the illuminance values were maximum for COB LED light source followed by Full-spectrum LED > W2+R1 > R2+B1 > R4+B1 appear. It was also examined that the COB LED light source was the best for plant growth compared to Full-spectrum LED, W2+R1, R2+B1, R4+B1 light sources. According to the current study, it can be concluded that the COB LED light source with a full-spectrum LED is suitable for growing Cuban jute plants.

동북아 생태네트워크 구축을 위한 방안 고찰

전성우 ( Seong Woo Jeon ),이명진 ( Moung Jin Lee ),강병진 ( Byung Jin Kang ) 한국환경정책평가연구원 2009 환경정책연구 Vol.8 No.3

본 연구는 실질적인 동북아 생태네트워크 구축을 위한 추진 방안을 마련하기 위하여 이론적 모형을 제시하였고, 위성영상자료를 분석하여 체계적인 동북아 생태네트워크 분석 및 검증을 수행하였으며, 이를 바탕으로 동북아 생태네트워크 추진방안에 대한 정책적 사항을 제안하였다. 동북아 생태네트워크 분석 결과 한반도의 경우 일부 분산된 핵심지역들이 분포하고 있으며, 중국은 동북 3성 일부에만 핵심지역이 존재하였다. 극동 러시아의 경우 대부분이 핵심지역에 속하며 종에 대한 안정적 서식처로 활용될수 있을 것이다. 몽골의 경우 중국 동북 3성 지역과 연계되어 핵심지역이 존재하는 것으로 파악되었다. 본 연구에서 제안한 방안은 국가 수준을 넘어서는 생태네트워크의 개념을 동북아지역에 도입하기 위한 방안을 모색하기 위한 연구라고 할 수 있다. 또한 국가 수준을 넘어서는 국제 생태네트워크 구축 및 동북아 생태네트워크 구축을 위한 사례 검증을 제시하였으며, 향후 실제 추진과정에 있어 가이드라인으로 기능할 수 있도록 하였다. 앞으로 시계열 위성영상 및 환경관련 공간정보가 보다 많이 확보된다면 동북아 전체의 토지피복 및 식생에 대한 변화를 분석할 수 있으며, 동북아 생태네트워크 분석 및 구축에 보다 용이할 것이다. In the 1990s, when the viewpoint that an ecosystem is a single network within a specific region was adopted, the preservation and management of natural ecosystems was proposed. With regard to Northeast Asia, the expansion of trans-boundary pollution due to rapid development and the swift destruction of the natural environment emphasize the necessity for environmental cooperation. The Northeast Asia region made up of South Korea, North Korea, three northeastern prefectures in China, the Russian far-east, and parts of Mongolia were selected to be analyzed for an ecological network. The significance of this study lies in the development of a methodology for building a Northeast Asian ecological network through the use of satellite images. Regarding the methods of analysis, stable habitats for four priority species were selected to be performed using overlay analysis. The result of the analysis of the ecological networks in the whole Northeast Asia region showed that there were key areas partly dispersed in the Korean Peninsula, but whether the key areas would be maintained in the long term is unknown. As for China, key areas were concentrated in the border areas around the Tumen River and in parts of the three northeastern prefectures. Russia had wide-ranging areas that could function as stable habitats for most species. As a result of the actual conditions of the ecological networks, most of the Northeast Asia region, including the Korean Peninsula, was in poor condition, requiring appropriate measures and their operation as soon as possible. Also, it was revealed that further investigation and research was necessary for border areas that were identified to be key areas.

채소정식기의 절삭날에 의한 생분해성 포트의 낙하속도 측정

전성우 ( Seong-woo Jeon ),이건호 ( Gun-ho Lee ),볼라 ( Bhola-paudel ),파우델 ( Nibas-chandra Deb ),니바스찬드라뎁 ( Hyeon-tae Kim ),김현태 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

농업의 기계화가 진행됨에 따라 벼농사의 기계화율은 97%를 넘어가는 것에 비하여 밭농업 기계화율은 50%에 머물러 있다. 밭농업의 기계화를 위한 작물에 맞는 밭작물 기계를 연구에 관심이 높아지고 있지만, 여전히 농민의 요구에 비해 부족한 상황이다. 밭농업 기계 중 채소 정식기는 기존의 인력 작업속도 보다는 빠르지만 취출시 작물의 뿌리에 손상을 주거나 복토의 파괴 등 문제점이 나타났다. 본 연구의 목적은 생분해성 포트용 채소 정식기의 이식 과정 최적화로 컷팅에 의한 포트의 낙하 속도를 측정하는 실험을 진행하였다. 본 실험에는 임의로 선택된 생분해성 포트를 함수율을 다르게 하여 절삭날의 충격량에 따라 변하는 낙하 속도를 초고속카메라로 촬영하였다. 샘플 포트를 무게측정 한 후 증류수에 5분간 담가둔 뒤 물기를 털고 다시 5분간 담가두는 과정을 30분간 반복 하였다. 이 후 침지 시간을 15분으로 늘리고 이 과정을 240분간 16번 반복하였다. 24시간 25℃에서 침지 하여 최대 수분 흡수를 결정하였다. 생분해성 포트를 건조 시간을 날짜순으로 하여 낙하실험을 진행하였다. 초고속카메라를 사용하여 프레임당 포트가 변하는 위치를 계산해서 낙하 속도를 계산하였다.

생태계 서비스 가치평가를 위한 산림 유형 분류 방안 - 임상도와 토지피복지도 활용을 중심으로 -

전성우 ( Seong Woo Jeon ),김재욱 ( Jae Uk Kim ),정휘철 ( Hui Cheul Jung ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2013 한국환경복원기술학회지 Vol.16 No.3

Some researcher started studies of natural capital from 1980`s. But many researches are going along with the theme lately. Most assessment of ecosystem services are approaching a general assessment using a land-cover map. Therefore they have some problems such as overestimate, underestimate, and double counting, and so on. This study suggested a detailed typology for quantitative assessment about ecosystem services. It compared land-cover map and forest type map to select a based map and made criteria with reference to the literature and field survey. It subdivided a forest typology using ecological feature (natural forest, artifical forest), forest type (coniferous forest, mixed forest, hardwood forest) and age of stand in forest type map. Each forest type is widely distributed 21~40 ages of forests and biggest area is 21~40 ages of mixed forest in all forest typology. Further researches have to progress consistently assessment using detailed typology and function of forest ecosystem services.

4-Bar 링크 채소 정식기의 이식 작업속도 최적화

전성우 ( Seong Woo Jeon ),이건호 ( Gun Ho Lee ),파우델볼라 ( Bhola Paudel ),김현태 ( Hyeon Tae Kim ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.1

채소에 대한 수요 증가는 효과적인 기계화를 통해 상품을 증산하여 충족시킬 수 있습니다. 그러나 수확 및 타작 기계에 비해 정식기 기계의 개발은 여전히 한계가 있습니다. 대부분의 기존 정식기는 단일 속도로 작동하도록 설계되어 있기 때문에 여러 종류의 작물에는 적합하지 않은 단일 정식 간격이 발생합니다. 따라서 본 연구에서는 기존 한가지 및 비교적 낮은 속도로 작업하는 정식기를 다른 상용 정식기와 대응되는 여러 가지 정식 속도로 최적화하기 위해 노력했습니다. 먼저 기존 정식기 유닛의 설계 특징을 상용 시뮬레이션 소프트웨어(SOLIDWORKS)에서 추출하여 설계했습니다. 이후 고속 카메라 비디오에서 정식기의 실제 궤적을 추출하고 시뮬레이션 결과와 비교하여 설계 정확성을 보장했습니다. 다음으로, 상용 이식기와 유사한 다른 작동 속도 (150-350mm/s)에서 정식기 설계를 시뮬레이션하고 작동 궤적을 추출했습니다. 링크 궤적을 비교하여 이상적인 궤적 요건을 충족하는 속도를 선택했습니다. 선택된 속도는 토양 실험에서 이식기에서 시험 되었습니다. 30, 40 및 50 rpm의 크랭크 회전으로 200mm/s, 250mm/s 및 300mm/s의 속도로 이식기 장치를 작동할 수 있음을 확인했습니다. 선택된 속도 조합은 다른 상용 정식기와 유사하며, 실험 결과는 정식기의 심기 성능이 허용 범위 내에 있음을 여주었습니다.

프로톤펌프억제제와 클로피도그렐(clopidogrel) 병용투여는 안전한가?

전성우 ( Seong Woo Jeon ) 대한내과학회 2011 대한내과학회지 Vol.80 No.4

The treatment of acute coronary syndromes involves a combination of antiplatelet therapies. Proton pump inhibitors (PPIs) are often recommended for prophylaxis of gastrointestinal bleeding. Recent studies have shown that the cardiovascular harmful effects of the combination therapy with these two drugs cause serious results in patients with acute coronary syndrome. However, the data on this subject, especially on the clinical outcomes, are conflicting. Based on the available data, the decision to prescribe a PPI to a patient on clopidogrel should be done after evaluation of the cardiovascular risk and the gastrointestinal benefit. Further prospective randomized trials are needed to jump to the conclusions. (Korean J Med 2011;80:405-407)

식생 군집구조 안정성 평가항목 보완을 통한 국토환경성평가지도 개선방안 연구

전성우 ( Seong Woo Jeon ),송원경 ( Won Kyong Song ),이명진 ( Moung Jin Lee ),강병진 ( Byung Jin Kang ) 한국환경보건기술학회(구 한국환경복원녹화기술학회) 2010 한국환경복원기술학회지 Vol.13 No.2

The Environmental Conservation Value Assessment Map (ECVAM) is a five grade assessment map created with nationally integrated environmental information and environmental values. The map is made through the evaluation of 67 items, including greenbelt area and bio-diversity. The ECVAM assesses the stability of the community using forest maps. However, the existing assessment method is problematic because the assessment grades are evaluated using higher than practical values; in part because it uses even-valued overlay and minimal indicator methods. This study was performed in order to suggest an integrated assessment method that could complement the stability evaluation based on existing methods. Accordingly, this study added forest type information, including whether the forest was natural or artificial, to the overlay method using forest diameter maps and forest density maps. As a result, the proposed ECVAM indicated a drastic grade change. After applying the method in South Korea, GradeⅠ areas decreased 12.1%, from 52.6% to 40.6%, GradeⅡ areas increased 11.9%, from 17.4% to 29.2%, and GradeⅢ areas increased 0.2%, from 17.1% to 17.4%, respectively. From the results of the field survey, we found differences between natural forest and planted forest with regard to the number of mortality, species of shrubs, and vine cover. This means that natural forests are more stable than planted forests. This study suggests an improved assessment methodology to complement the existing EVCAM method. The results are expected to be used in environmental evaluations and forest conservation value assessments in ecology and environmental fields.

광역생태축 구축을 위한 기준 및 관리지역 설정 연구

전성우 ( Seong Woo Jeon ),천정윤 ( Joung Yoon Chun ),성현찬 ( Hyeon Chan Seong ),송원경 ( Won Kyong Song ),박지희 ( Ji Hee Park ) 한국환경보건기술학회(구 한국환경복원녹화기술학회) 2010 한국환경복원기술학회지 Vol.13 No.5

This study was performed to show criteria of a National Ecological Network (NEN) for South Korea and it was a part of a study of ecological network for broad areas on national land showed by Ministry of Environment of Korea. After 1970s, many european countries presented methods and criteria not on individual protected area but on networking among many habitats. The PEEN (Pan European Ecological Network) and NATURA 2000 are results of those. In South Korea, concepts and mapping metheods of ecological network was studied but those were not applied to the whole national land because the equality and local specialities were not reflected. So, in this study, we presented the criteria composed of forest, river, wildlife and coastal evaluation items in conservation ecology and showed the mapping method which can applied to the national land. After the evaluation on land area which composed of forest, river and wildlife axis. Core areas were 30,616km2, buffer zone were 21,870km2 and each accounted for 31% and 22% of the national land. Except for Taebaeck-Gangwon region, whole region`s core areas were accounted for 20~30% of it and buffer zone were accounted for 20~25% of it, so these can be applied to the national land with equality and local specialities. Forest axis and river axis were clearly linear and connected, but the wildlife axis was dispersed in point form. Therefore, to apply the NEN, a detailed habitat map is important and the interconnected implementation of forest, river, wildlife, and coastal axis is required.