공간통계기법을 이용한 도로교통기반의 온실가스 관한 연구 -대구광역시를 대상으로-

이상우,이승욱,이승엽,홍원화,Lee, Sang Woo,Lee, Seung Wook,Lee, Seung Yeob,Hong, Won Hwa 한국공간정보학회 2014 한국공간정보학회지 Vol.22 No.1

본 연구는 대구광역시의 주요도로를 대상으로 공간통계기법을 이용하여 도로교통 온실가스 배출량을 신뢰성있게 예측하여 추정된 배출량으로 행정구별에 따라 도로교통에서 발생한 온실가스 배출량을 산정하는 것을 목적으로 하였다. 첫째, 주요도로의 교통량 관측지점에서 실시간으로 조사한 교통량을 이용하여 관측지점에서 발생한 온실가스 배출량을 산정하였다. 둘째, 일반 크리깅(Universal Kriging)기법을 이용하여 공간적 상관성에 의해 미 관측지점의 온실가스 배출량을 신뢰성 있게 추정하기 위해 적합한 베리오그램 모델링을 설정하였다. 이에 교차검증을 통하여 적합한 베리오그램 모델과 크리깅 기법의 타당성을 검증하였다. 셋째, 검증된 크리깅 기법으로 미 관측지점의 도로교통에서 발생한 온실가스 배출량을 예측하여 행정구별로 도로교통 온실가스 배출량을 추정하여 산정하였다. 그 결과, 도로교통 온실가스 배출량을 행정구별로 보면 북구가 약 $291,878,020kgCO_2eq/yr$로 가장 많은 온실가스를 배출하는 것으로 나타났다. This study was intended to reliably predict the traffic green house gas emission in Daegu with the use of spatial statistical technique and calculate the traffic green house gas emission of each administrative district on the basis of the accurately predicted emission. First, with the use of the traffic actually surveyed at a traffic observation point, and traffic green house gas emission was calculated. Secondly, on the basis of the calculation, and with the use of Universal Kriging technique, this researcher set a suitable variogram modeling to accurately and reliably predict the green house gas emission at non-observation point suitable through spatial correlation, and then performed cross validation to prove the validity of the proper variogram modeling and Kriging technique. Thirdly, with the use of the validated kriging technique, traffic green gas emission was visualized, and its distribution features were analyzed to predict and calculate the traffic green house gas emission of each administrative district. As a result, regarding the traffic green house gas emission of each administration, it was found that Bukgu had the highest green house gas emission of $291,878,020kgCO_2eq/yr$.

소형 연료전지 연계형 DC GRID 부하 특성

이상우,이상철,권오성,배준형,박태준,강진규,이동하,Lee, Sang-Woo,Lee, Sang-Cheol,Kwon, O-Sung,Bae, Jun-Hyung,Park, Tae-Joon,Kang, Jin-Kyu,Lee, Dong-Ha 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3

In recent years, understanding the dynamics of DC distribution system has become critically important due mainly to the increasing needs for the interconnection of DC distributed generators and the (DC-based) electric vehicle (EV) charging systems. In this paper, the characteristics of the DC grid system connected to the compact proton exchange membrane fuel cell (PEMFC) has been studied. In particular, the voltage and current transient phenomena were measured by varying the load of the DC grid system. Also, the voltage and current ripple were measured at the different load conditions. Our experimental results clearly manifested that the study contributes to the establishment of fundamental method to characterize the small DC grid system including distributed generation.

천수만 해역에서 장마기 담수 방류가 플랑크톤에 미치는 영향

이상우,박철,이두별,이재광,Lee, Sangwoo,Park, Chul,Lee, Doobyoul,Lee, Jaegwang 한국해양학회 2014 바다 Vol.19 No.1

반폐쇄적인 천수만에서 장마기 동안 짧은 기간에 대량의 담수가 집중적으로 유입될 때 발생할 수 있는 플랑크톤 생태계의 영향을 파악하고자 하였다. 이를 위해 장마기 전 후, 2012년 6월 27일부터 9월 1일까지 약 열흘 간격으로 수온, 염분, chlorophyll a 농도, 영양염 농도와 동물플랑크톤의 분포를 조사하여, 이들 각 변수간의 관계를 파악해 보았다. 담수 방류 후 영양염 농도는 약 2배 이상 증가하였고, 그 결과로 나타나는 chlorophyll a 농도 증가는 수 일이 소요되는 것으로 추정되었다. 동물플랑크톤의 경우는 먹이생물인 식물플랑크톤의 증가에 따른 개체수 증가라는 긍정적인 면과 염분 충격으로 인한 사망이라는 부정적인 면이 동시에 나타나는 것으로 여겨졌다. 급격한 염분 하강으로 인한 동물플랑크톤의 사망률은 최고 40%까지 나타났으나, 사체의 빠른 침강으로 신뢰할 만한 사망률 추정에는 한계가 있었다. The impact of freshwater discharge on plankton was investigated in a semi-closed Cheonsu Bay during the rainy season. Field observations for environmental factors (seawater temperatures, salinities, chlorophyll a concentrations and nutrient concentrations) and zooplankton sampling were carried out from June 27 to September 1, 2012 at about 10 days interval. The relationship between the measured parameters and estimated values of zooplankton abundance were examined. After freshwater discharge, nutrient concentrations increased up to about twice and resultant increase of chlorophyll a followed within about 10 days. Both positive and negative impacts on zooplankton were observed. Positive one was the numerical response of zooplankton on this increased food supply, and negative one was the increased mortality caused by sudden changes in salinity. Maximum mortality of copepods was found to be up to 40%, although fast sinking of carcass made it difficult to estimate reliable mortality caused by salinity shock.

물리화학적 처리를 이용한 군부대 사격장 내 중금속 오염 토양의 정화

이상우,이우춘,이상환,김순오,Lee, Sang-Woo,Lee, Woo-Chun,Lee, Sang-Hwan,Kim, Soon-Oh 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.5

This study evaluated the feasibility of combined use of physical separation and soil washing to remediate heavy metals (Pb and Cu) contaminated soil in a military shooting range. The soils were classified into two types based on the level of heavy metal concentrations: a higher contaminated soil (HCS) with Pb and Cu concentrations of 6,243 mg/kg and 407 mg/kg, respectively, and a lower contaminated soil (LCS) with their concentrations of 1,658 mg/kg and 232 mg/kg. Pb level in both soils exceeded the regulatory limit (700 mg/kg), and its concentration generally increased with decreasing soil particle size. However, in some cases, Pb concentrations increased with increasing soil particle size, presumably due to the presence of residues of bullets in the soil matrix. As a pretreatment step, a shaking table was used for physical separation of soil to remove bullet residues while fractionating the contaminated soils into different sizes. The most effective separation and fractionation were achieved at vibration velocity of 296 rpm/min, the table slope of 7.0°, and the separating water flow rate of 23 L/min. The efficiency of ensuing soil washing process for LCS was maximized by using 0.5% HCl with the soil:washing solution mixing ratio of 1:3 for 1 hr treatment. On the contrary, HCS was most effectively remediated by using 1.0% HCl with the same soil:solution mixing ratio for 3 hr. This work demonstrated that the combined use of physical separation and soil washing could be a viable option to remediate soils highly contaminated with heavy metals.

$Ar/N_2 및 Kr/N_2$혼합가스의 교류절연파괴 특성

이상우,김인식,이동인,이광식,김이국,Lee, Sang-Woo,Kim, In-Sik,Lee, Dong-In,Lee, Kwang-Sik,Kim, Lee-Kook 대한전기학회 2001 전기학회논문지C Vol.50 No.12

In this paper, the ac breakdown characteristics of pure Ar, Kr and $N_2$ gas with gas pressure range of 58.8-137.3[kPa] under uniform and non-uniform fields were investigated, and the measured values were compared with those In Ar/$N_2$ and Kr/$N_2$ gas mixtures with pressure varying. Summarizing the experimental results, the breakdown voltages of Pure $N_2$gas, under uniform and non-uniform fields, were increased about 4.8 and 1.1 times than those of pure Ar gas, and about 4.4 and 1.2 times than those of pure Kr gas, and the ac breakdown voltage increased with the pressure increasing. The breakdown voltages of Ar/$N_2$ gas mixtures were decreased with decreasing the mixture ratio of Pure $N_2$ gas. In case of Ar(85%)/$N_2$ (15%) and Ar(70%)/$N_2$ (30%) gas mixtures comparing to the pure Ar gas, the breakdown voltages under uniform field were increased about 1.8 and 2.2 times, and under non-uniform field were increased about 1.1 and 1.3 times at the pressure of 101.3[kPa]. Also, in case of Kr(85%)/$N_2$ (15%) and Kr(70%)/$N_2$ (30%) gas mixtures comparing to the pure Kr gas, the breakdown voltages under uniform field were increased about 1.7 and 2.0 times, and under non-uniform field were increased about 1.0 and 1.2 times. Corona inception voltage of Kr(70%)/$N_2$(30%) gas mixtures under non-uniform fields were increased about 1.28 times than those of Ar(70%)/$N_2$ (30%) gas mixtures. In case of practical incandescent lamps, luminous and lifetime of Kr(70%)/$N_2$ (30%) gas mixtures were increased about 1.15 and 1.21 times than those of Ar(70%)/$N_2$ (30%) gas mixtures.

반응표면법을 이용한 안전밸브의 최적화

이상우,신대영,변철웅,Lee, Sang-Woo,Shin, Dae-Young,Byun, Cheol-Woong 한국전산구조공학회 2007 한국전산구조공학회논문집 Vol.20 No.5

소화시스템에 사용되는 고압의 소화가스 저장용기에는 저장용기의 파손을 막아주는 안전밸브가 있다. 이러한 안전밸브의 내부에는 원형 박판의 파열 판이 들어 있는데, 저장용기의 내압이 위험수준에 도달하면 파열 판이 파손하여 내압을 배출하는 역할을 한다. 안전밸브의 설계인자는 파열 판의 두께, 안전밸브의 유로 직경, 플라스틱 패킹 링의 내부 직경 그리고 파열 판을 고정하는 볼트 안쪽의 필렛 반경이 있다. 이중에서 파열 판의 두께는 0.2mm로 고정을 하였다. 요인배치법을 사용하여 주효과를 결정하였고 회귀방정식을 유도하였다. 이러한 회귀방정식은 추후 안전밸브의 설계에 있어서 기초 설계 자료로서 활용할 수 있도록 실험 결과와 비교하여 검증하였다. 검증실험 및 회귀방정식에 의한 결과의 오차는 약 $2{\sim}5%$ 정도인 것을 확인하였다. 그리고 반응표면법을 사용하여 기밀테스트 압력인 25MPa에서 파열할 수 있는 안전밸브의 최적 모델을 결정하였다. High pressure storage of the agent gas in fire suppression system was composed of tank, main valve and safety valve, which prevents the fracture of the high pressure storage. The safety valve has circular thin plate as fracture plate that was destroyed over fracture pressure. When inner pressure of the storage is reached the fracture pressure, the safety valve discharges gas and degrades simultaneously the inner pressure of the storage. There are design variables such as flow path diameter, inner diameter of the plastic packing ring, thickness of plate and fillet radius. In this variables, thickness of plate is set to be a value of 0.2mm. The main effect of variables on the inner pressure, has been decided using factorial design and statistical analysis. Therefore, the relation of variables are expressed by regression equation. It is disclosed results that the difference of fracture pressures between the equation and experiment has $2{\sim}5%$. Finally, using response surface method, the optimal design of the safety valve could be decided with safety pressure of 25MPa, where the fracture occurs on circular thin plate.

수확기(收穫機)의 성능향상(性能向上)에 관(關)한 연구(硏究)(I) - 수도(水稻)의 탈립저항력(脫粒抵抗力)에 관(關)하여

이상우,허윤근,Lee, Sang Woo,Hur, Yun Kun 충남대학교 농업과학연구소 1981 Korean Journal of Agricultural Science Vol.8 No.2

충남농촌진흥원(忠南農村振興院) 포장(圃場)에서 표준시비법(標準施肥法)으로 재배(栽培)한 Japonica형(型) 품종(品種) 이이(裡里)348호(號), 이이(裡里)345호(號) 및 밀양(密陽)15호(號) 3개斗(個)와 Indica ${\times}$ Japonica hybrid형(型) 품종(品種) 밀양(密陽)23호(號), 이이(裡里)342호(號), 수원(水原)294호(號)의 4개(個), 계(計) 7 개(個) 품종(品種)에 대해 적정수확기간(適定收穫期間)을 중심(中心)으로 9월(月)28일(日)부터 10월(月)20일(日)까지 2일간격(日間隔)으로 3축방향(軸方向)에 대(對)하여 탈립저항력(脫粒低抗力)을 측정(測定)하였다. 10월(月)1일(日) 채취(採取)된 시료(試料)를 실험실(實驗室)에서 자연건조(自然乾燥)시키면서 함수율별(含水率別) 탈립증항력(脫粒拯抗力)을 측정(測定)하였다. 본(本) 연구(硏究)의 결과(結果)는 다음과 같다. 1. 외력(外力)이 지경(枝梗)과 평행방향(平行方向)으로 작용(作用)될 경우 Japonica형(型) 품종(品種)의 탈립저항력(脫粒低航力) 평균(平均) 113grdljTEk. 2. 외력(外力)이 지경(枝梗)과 $90^{\circ}$ 측방향(側方向)으로 작용(作用)될 경우의 탈립증항력(脫粒拯抗力)은 평행방향(平行方向)과 비교(比較)하여 Japonica형(型) 품종(品種)은 33~50%인 59.8~115.0gr이었고, Indica ${\times}$ Japonica hybrid형(型) 품종(品種)은 7~21%인 9.8~28.2gr으로 현저(顯著)히 작았다. 3. 기온(氣溫)이 영하(零下)로 강하(降下)하지 않은 본실험기간중(本實驗期間中) 예취일(刈取日)에 따른 탈립심지항력(脫粒甚至抗力)의 변화(變化)는 크게 없었다. 4. 예취후(刈取後) 자연건조(自然乾燥)에 따른 탈립심지항력(脫粒甚至抗力)은 함수율(含水率)의 감소(減少)와 함께 감소(減少)하였다. 5. 이삭 부위별(部位別) 탈립서항력(脫粒鼠抗力)은 상부측(上部側)에 비(比)해 하부측(下部側)에서 약간 큰값을 나타냈다. Threshing forces of seven varieties, that is, three Japonica type varieties-Irri 348, Irri 345, and Milyang 15, and four Indica type varieties-Milyang 23, Irri 342, Suweon 294 and Suweon 287-, which have been cultivated in the standard fertilization field being at Chungnam Provincial Office of Rural Development, Youseong, Chungnam-do, they were measured every other day in the period from September 28 to October 20 which were included the proper harves ting time. Also the threshing forces were checked in three-dimensional directions. Relationships between threshing forces and moisture contents of the unthreshed rice were examined in the laboratory as dried in the natural condition. The results of this study were as follows; 1. The mean threshing force of Japonica type varieties was about 1969r. and that of Indica type varieties was about 113gr. when external force was loaded in the direction parallel to the grain. 2. The threshing force bent to the grain was about 9.8through 28.2gr. equal to 7 through 21 percent to the threshing force parallel to the grain in Indica type varieties meanwhile about 59.8 through 115.0gr equal to 33 through 50 percent in Japonica type varieties. 3. Under the warmer temperature than $0^{\circ}C$, the change of threshing forces was not great in this experimental period on the harvesting dates. 4. The threshing force decreased s lightly as moisture content decreased in natural drying under the shade after cutting. 5. The threshing force of the lower portion was a little biger than that of the upper portion in an ear.

Phenothiazine 유도체(誘導體)의 용혈작용(溶血作用)에 관(關)한 실험적(實驗的) 연구(硏究)

이상우,Lee, Sang-Wu 대한약리학회 1968 대한약리학잡지 Vol.4 No.1

The author studied the hemolytic action of phenothiazine derivatives such as promazine, prochlorper azine, perphenazine and thiethylperazine on rabbit erythrocytes, and obtained the following results: 1. Promazine, prochlorperazine, perphenazine and thiethylperazine caused hemolysis in vitro in the following order: Thiethylperazine>perphenazine>prochlorperazine>promazine. 2. Cholesterol inhibited the hemolytic action of prochlorperazine, perphenazine and thiethylperazine, but had no effect on promazine hemolysis. 3. Dextrose, albumin and blood plasma protected erythrocytes against promazine, prochlorperazine, perphenazine and thiethylperazine. 4. The intravenous injection of promazine, prochlorperazine, perphenazine and thiethylperazine caused hemolysis in the same order as they did in vitro.

실무자 인터뷰를 통한 청주시 아동 그룹홈의 주거 개선 요구 조사

이상우,이민서,우자강,이현정,Lee, Sang Woo,Yi, Minseo,You, Zikang,Lee, Hyun-Jeong 인천대학교 도시과학연구원 2020 도시과학 Vol.9 No.2

The purpose of this study was to assess needs for housing improvement of children group homes in Cheongju-si through interviews with the group home directors and staffs. From April 6, 2018, to April 25, 2018, a series of face-to-face interviews with four directors and three staffs working in four children group homes was conducted. The results were analyzed using thematic analysis technique. Highlights of major findings and implications were as follow: (1) Bedroom: Needs for independent bedrooms and desks for each child were dominant. (2) Common activity space: Interviewees showed somewhat different opinions on common activity spaces according to group home types and/or between directors and staffs. (3) Between "a big and good-quality house" and "a house in good location", interviewees were found to prefer "a big and good-quality house" in order for children to have enough space to run and play. (4) Interviewees insisted that to provide proper group home services and protection similar to a real family, current policy to accommodate up to eight children in one group home should be improved.

ceo가 읽은 책 - 조직관리의 세계관으로 다가오는 도

이상우,Lee, Sang-U 대한출판문화협회 2003 출판저널 Vol.330 No.-