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엄명철 ( Eom Myung-chul ),조국현 ( Jo Guk-hyun ),임종완 ( Lim Jong-wan ),김태철 ( Kim Tae-chul ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
Geumgang canal is planned to connect Geumgang lake with Saemangeum reservoir to accelerate desalinization and dillute polluted water in Saemangeum reservoir. The purpose of this study is to evaluate the variations of water quality by divesion of Geumgang lake flow to the Saemangeum reservoir. WASP5 model was used to estimate water quality concentration of Geumgang lake. Model calibration and verification was done for water quality data for 2001 and 2002. As a result of simulating water quality concentration for 4 scenarios, which was considered whether Geumgang canal will be built, there was little influence on water quality in Geumgang lake though Geumgang lake flow diverted to Saemangeum reservoir.
엄명철 ( Eom Myung-chul ),이광야 ( Lee Kwang-ya ),공동수 ( Kong Dong-soo ),권순국 ( Kwun Soon-kuk ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
Discharge characteristics of pollutant loadings from sewage systems were estimated in the catchment area of a reclaimed area - Saemangeum -. Pollutant loadings were estismated according to the discharge pattern of small treatment facilities. BOD pollutant loadings produced by population were 84,380kg/day, which were composed of nightsoil 35% and sewage 65%.
엄명철 ( Eom Myung Chul ),조국현 ( Jo Guk Hyun ),이광야 ( Lee Kwang Ya ),김계현 ( Kim Kye Hyun ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
The purpose of this study is to construct an Environment Database Management System (EDMS) for the Saemangeum watershed based on the linkage of Water Quality Model, i.e. QUALKO and WASP model, and GIS database to estimate water quality effectively in this area. There are two major river systems on this study area, the Mangyeong and the Dongjin rivers. Input data are automatically generated through the calculation of the pollutant loading and inflow concentration from the point and non-point sources. The developed system is composed of three different phases, such as pre-process, model performance and post-process. The Model performance is supported by the database at pre-process phase and model performance results were shown in the graphs and attribution data at post-process phase. The measured data from the Mangyeong and the Dongjin rivers are used to evaluate the applicability of EDMS. The EDMS shows higher reliability, and it is expected to contribute to the effective management and improvement of water quality modeling in the Saemangeum watershed since the system reduces complications of using a model in DOS operating environment and increases the accuracy of water quality analysis.
Myung Chul Kim,Min Gyu Kim,Young Soo Jo,Ho Sun Song,Tae In Eom,Sang Soo Sim 대한생리학회-대한약리학회 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.3
To investigate the underlying mechanisms of C18 fatty acids (stearic acid, oleic acid, linoleic acid and α-linolenic acid) on mast cells, we measured the effect of C18 fatty acids on intracellular Ca<sup>2+</sup> mobilization and histamine release in RBL-2H3 mast cells. Stearic acid rapidly increased initial peak of intracellular Ca<sup>2+</sup> mobilization, whereas linoleic acid and α-linolenic acid gradually increased this mobilization. In the absence of extracellular Ca<sup>2+</sup>, stearic acid (100 μM) did not cause any increase of intracellular Ca<sup>2+</sup> mobilization. Both linoleic acid and α-linolenic acid increased intracellular Ca<sup>2+</sup> mobilization, but the increase was smaller than that in the presence of extracellular Ca<sup>2+</sup>. These results suggest that C18 fatty acid-induced intracellular Ca<sup>2+</sup> mobilization is mainly dependent on extracellular Ca<sup>2+</sup> influx. Verapamil dose-dependently inhibited stearic acid-induced intracellular Ca<sup>2+</sup> mobilization, but did not affect both linoleic acid- and α-linolenic acid-induced intracellular Ca<sup>2+</sup> mobilization. These data suggest that the underlying mechanism of stearic acid, linoleic acid and α-linolenic acid on intracellular Ca<sup>2+</sup> mobilization may differ. Linoleic acid and α-linolenic acid significantly increased histamine release. Linoleic acid (C18:2: ω-6)-induced intracellular Ca<sup>2+</sup> mobilization and histamine release were more prominent than α-linolenic acid (C18:3: ω-3). These data support the view that the intake of more α-linolenic acid than linoleic acid is useful in preventing inflammation.
농업의 홍수조절기능과 수자원함양기능 계량화 및 가치평가에 관한 연구
서명철(Myung-Chul Seo),강기경(Ki-Kyung Kang),현병근(Byung-Geun Hyun),윤홍배(Hong-Bae Yun),엄기철(Ki-Cheol Eom) 한국토양비료학회 2008 한국토양비료학회지 Vol.41 No.2
In order to share the understanding agricultural multifunctionality with people, we carried out quantification and monetary evaluation for controlling flood and fostering water resources function in paddy and upland farming in Korea. The amount of water controlling flood and fostering water resources function in paddy farming was much greater than that in upland. The quantification of flood control function could be estimated by sum of the height of dike and water infiltrated during the flooding periods in paddy farming, and water excepting runoff water from precipitation at flooding time in upland farming. As results of estimation of flood control function, the amounts of water controlling flood have been evaluated as 294 mm year-1 in paddy farming and 72.6 mm year-1 upland farming, and was calculated 3.71 billion MT on a nation basis in 2006. When it was carried out monetary estimation as the cost of dam construction and the depreciation expense by using replacement cost method, flood control functions in paddy and upland were evaluated as 44,338.9 and 7,221.5 billion won, respectively. Comparing with previous reports, monetary value was analyzed much to increase because of rising price cost recently. Fostering water resource functions were also quantified in paddy and upland farming as the amount of water keeping and infiltrating water during the cultivation. In the basis of estimation model, it was showed that paddy and upland farming had been estimated to have 414.28 mm year-1, 18.7 mm year-1, respectively. They were also calculated to 4.49 and 0.137 billion MT on a nation basis in 2006, respectively. The economic values of fostering water resources function in paddy and upland farming were also estimated to 1,769.4 and 52.8 billion won, respectively, as replacing the amount of water to the cost of drinking water in 2006. There were differences by much to the amounts of controlling flood function and fostering water resource between paddy and upland farming. It means that paddy farming more play an important role in environment than upland farming in Korea.
전도냉각형 특성평가장치용 시편 홀드 설계를 위한 자장 해석
손명환(Myung-Hwan Sohn),박해용(Hae-Yong Park),엄범용(Beom-Yong Eom),배준한(Joon-Han Bae),성기철(Ki-Chul Seong),심기덕(Kideok Sim),김석호(Seokho Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
초전도 특성평가장치는 외부 인가 자장과 온도를 변화시켜 가며 고온 초전도 선재의 특성을 측정할 수 있는 장치이다. 본 논문에서는 제작된 초전도 특성평가장치용 마그네트에 장착할 임계전류 측정용시편홀더 설계에 필요한 전자장 해석을 하였다. 고온초전도선재는 자장의 세기가 증가함에 따라 임계전류의 값이 크게 감소한다. 시편에 공급하는 리턴 전류리드의 배치에 따라 초전도선재 시편이 경험하는 수직자장의 세기가 달라 임계전류값에 영향을 미칠 수 있다. 그 가능성을 최소로 하기 위해 리턴 전류리드와 시편사이의 거리, 리턴되는 전류리드의 개수에 따른 초전도선재 시편의 각 위치에서의 수직자장 분포를 해석하였다. 이 결과들을 바탕으로 실제 제작할 시편홀더를 설계하였다.
Kim, Myung Chul,Kim, Min Gyu,Jo, Young Soo,Song, Ho Sun,Eom, Tae In,Sim, Sang Soo The Korean Society of Pharmacology 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.3
To investigate the underlying mechanisms of C18 fatty acids (stearic acid, oleic acid, linoleic acid and ${\alpha}$-linolenic acid) on mast cells, we measured the effect of C18 fatty acids on intracellular $Ca^{2+}$ mobilization and histamine release in RBL-2H3 mast cells. Stearic acid rapidly increased initial peak of intracellular $Ca^{2+}$ mobilization, whereas linoleic acid and ${\alpha}$-linolenic acid gradually increased this mobilization. In the absence of extracellular $Ca^{2+}$, stearic acid ($100{\mu}M$) did not cause any increase of intracellular $Ca^{2+}$ mobilization. Both linoleic acid and ${\alpha}$-linolenic acid increased intracellular $Ca^{2+}$ mobilization, but the increase was smaller than that in the presence of extracellular $Ca^{2+}$. These results suggest that C18 fatty acid-induced intracellular $Ca^{2+}$ mobilization is mainly dependent on extracellular $Ca^{2+}$ influx. Verapamil dose-dependently inhibited stearic acid-induced intracellular $Ca^{2+}$ mobilization, but did not affect both linoleic acid- and ${\alpha}$-linolenic acid-induced intracellular $Ca^{2+}$ mobilization. These data suggest that the underlying mechanism of stearic acid, linoleic acid and ${\alpha}$-linolenic acid on intracellular $Ca^{2+}$ mobilization may differ. Linoleic acid and ${\alpha}$-linolenic acid significantly increased histamine release. Linoleic acid (C18:2: ${\omega}$-6)-induced intracellular $Ca^{2+}$ mobilization and histamine release were more prominent than ${\alpha}$-linolenic acid (C18:3: ${\omega}$-3). These data support the view that the intake of more ${\alpha}$-linolenic acid than linoleic acid is useful in preventing inflammation.
엄명철,이광야,조국헌,임종완,Eom Myung Chul,Lee Kwang Ya,Guk Guk Hyun,Lim Jong Wan 한국관개배수위원회 2004 한국관개배수논문집 Vol.11 No.1
The objective of this study is to analyze the characteristics of pollutant runoff loads on rainy days compared with dry days in the Mangyeong and Dongjin watersheds of Saemangeum tidal reclaimed area. Water samples were collected at 10 sites on the Mangye