감로수-중국고사 "해어의 꽃"

이기춘,Lee, Gi-Chun 한국관개배수위원회 2007 한국관개배수회지 Vol.37 No.-

방재과학세미나-냉수해 방지를 위한 농공학적 물관리 대책

이기춘,Lee, Gi-Chun 한국과학기술단체총연합회 1981 과학과 기술 Vol.14 No.2

한발 재해와 그 대책

이기춘,Lee, Gi-Chun 한국과학기술단체총연합회 1980 과학과 기술 Vol.133 No.-

감로수-재미있는 물 이야기-물과 관련된 꿈

이기춘,Lee, Gi-Chun 한국관개배수위원회 2007 한국관개배수회지 Vol.38 No.-

전국 확률강수량 산정을 위한 비정상성 빈도해석 기법의 적용

김광섭,이기춘,Kim, Gwang-Seob,Lee, Gi-Chun 한국농공학회 2012 한국농공학회논문집 Vol.54 No.5

In this study, we estimated probable precipitation amounts at the target year (2020, 2030, 2040) of 55 weather stations in Korea using the 24 hour annual maximum precipitation data from 1973 through 2009 which should be useful for management of agricultural reservoirs. Not only trend tests but also non-stationary tests were performed and non-stationary frequency analysis were conducted to all of 55 sites. Gumbel distribution was chosen and probability weighted moment method was used to estimate model parameters. The behavior of the mean of extreme precipitation data, scale parameter, and location parameter were analyzed. The probable precipitation amount at the target year was estimated by a non-stationary frequency analysis using the linear regression analysis for the mean of extreme precipitation data, scale parameter, and location parameter. Overall results demonstrated that the probable precipitation amounts using the non-stationary frequency analysis were overestimated. There were large increase of the probable precipitation amounts of middle part of Korea and decrease at several sites in Southern part. The non-stationary frequency analysis using a linear model should be applicable to relatively short projection periods.

봄철 강수량 및 강수효율의 지역적 특성별 변화분석

김광섭,김종필,이기춘,Kim, Gwang-Seob,Kim, Jong-Pil,Lee, Gi-Chun 한국농공학회 2011 한국농공학회논문집 Vol.53 No.3

The temporal variability of spring (March, April, May) monthly precipitation, precipitation effectiveness, monthly maximum precipitation, monthly precipitation of different durations, and the precipitation days over several threshold (i.e. 0, 10, 20, 30, 40, and 50 mm/day) of 59 weather stations between 1973 and 2009 were analyzed. Also to analyze the regional characteristics of temporal variability, 59 weather stations were classified by elevations, latitudes, longitudes, river basins, inland or shore (east sea, south sea, west sea) area and the level of urbanization. Results demonstrated that trends of variables increase in April and decrease in May except precipitation day. Overall trend of precipitation amount and precipitation effectiveness is same but precipitation effectiveness of several sites decrease despite the trend of precipitation amount increases which may be caused by the air temperature increase. Therefore more effective water supply strategy is essential for Spring season. Regional characteristics of Spring precipitation variability can be summarized that increase trend during May become stronger with the increase of latitude and elevation which is similar to that of Summer season. The temporal variability of variables showed different behaviors according to river basins, inland or shore (east sea, south sea, west sea) area and the level of urbanization.

지역특성별 연강수특성 변화분석

김광섭,김종필,이기춘,Kim,Gwang-Seob,Kim,Jong-Pil,Lee,Gi-Chun 한국방재학회 2011 한국방재학회논문집 Vol.11 No.2

본 연구에서는 1973년부터 2009년까지 전국 기상관측소 59개 지점에 대한 연강수량, 지속시간별 연최대강수량, 그리고 한계치별(threshold) 강수일수 등 극한지수를 이용하여 지역특성에 따른 추세특성을 분석하였다. 그리고 59개 지점에 대한 위치적 특성을 구분하기 위하여 고도, 위도, 경도, 유역, 내륙 및 해안(동해, 서해, 남해), 도시화 및 비도시화 등으로 분류하여 지역특성에 따른 추세분석을 실시하였다. 강수량 자료에 대한 추세분석 결과, 강수일수를 제외한 대부분의 변수들은 증가하는 경향성이 나타났다. 지역특성별 증가특성의 경우 고도가 높아질수록 증가추세가 뚜렷하였고, 유역별로는 한강유역의 증가추세가 가장 크고 영산강유역의 증가추세가 가장 작았으며, 위도별로는 위도가 높아질수록 증가추세가 커졌다. 해안별 특성은 동해안의 증가 추세가 가장 크고 남해안의 증가 추세가 가장 작았으며 이는 해안의 고도차에 따른 영향으로 판단된다. 위도증가에 따라 내륙의 평균 증가폭은 해안 전체의 평균 증가폭과 비슷했다. 경도별로는 내륙에서 태백산맥에 해당하는 부분이 가장 큰 증가추세를 보였다. 도시화 지역이 비도시화 지역에 비하여 상대적으로 큰 증가추세를 보였다. 증가추세는 전반적으로 고도와 위도가 증가할수록 증가추세가 뚜렷하고 통계적으로 유의한 것으로 나타났다. In this study, recent trends of the annual precipitation, the annual maximum precipitation of different durations and the rain days over several thresholds(i.e. 0, 10, 20, 40, 60 and 80 mm/day) according to the different local features were analyzed using daily precipitation data of 59 weather stations between 1973 and 2009. To analyze the variability according to the regional characteristics, 59 weather stations were classified by elevations, latitudes, longitudes, river basins, inland or shore(east sea, south sea, west sea) area and the level of urbanization. Results demonstrated that overall trend of variables increases except rain day. Results according to the regional characteristics showed that the increase trend becomes stronger with elevation increase. The increase trend of Han river basin is largest and that of Youngsan river basin is smallest. Also the increase trend becomes stronger with latitude increase and that of East coast is larger than that of South coast since it may be caused by the regional difference of elevation. The increase trend of urban area is larger than that of rural area. Overall trend showed that increase trend becomes stronger with elevation and latitude increase.

의료서비스에 대한 소비자만족과 기대불일치 모델의 검증

김미라 ( Kim Mi La ),이기춘 ( Lee Gi Chun ) 한국소비자학회 2004 소비자학연구 Vol.15 No.1

The purpose of this study was to develop the model of consumer satisfaction with medical services in the basis of expectation-disconfirmation theory. The major findings were as follows: 1. The level of consumer satisfaction with medical services was not high. The level of consumer satisfaction with physicians was the highest and the level with facilities was the lowest among the dimensions of the medical services. 2. In the model of the outpatient service, the performance of the personal aspects, the performance of the facilities, the perceived disconfirmation of the personal aspects and the perceived disconfirmation of the facilities had a casual effect. The performance of the facilities had the greatest casual effect among them. 3. In the model of the inpatient service, the performance of the personal aspects, the performance of the facilities and the perceived disconfirmation of the facilities had a casual effect. The performance of the facilities had the greatest casual effect among them.

공업화학(전기화학, 분석화학 포함) 촉매/반응공학 란탄 기반 페롭스카이트 촉매를 이용한 악취 유발 물질의 저온 산화 반응

방용주 ( Yong Ju Bang ),서정길 ( Jeong Gil Seo ),이기춘 ( Gi Chun Lee ),박찬정 ( Chan Jung Park ),김형태 ( Hyung Tae Kim ),송인규 ( In Kyu Song ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.2

Various La-based perovskite catalysts were prepared by a Pechini method, and they were applied to the low-temperature oxidation of odor compounds exhausted from waste food treatment process for effective deodorization. Quantitative and qualitative analyses of exhausted gas were conducted to measure the amount of major odor compounds with respect to operation time. A standard odor sample composed of major odor compounds was then prepared for use as a feed for oxidation reaction system. Various transition metal(M)-substituted La-based perovskite catalysts (LaMO3: M=Cr, Mn, Fe, Co, and Ni) were prepared and applied to the oxidation of odor compounds in order to investigate the effect of transition metal M. Among the catalysts tested, LaNiO3 catalyst showed the best catalytic performance. Pt-substituted perovskite catalysts (LaNi1-xPt03: x=0, 0.03, 0.1, and 0.3) were then prepared for enhancing the catalytic performance. It was found that LaNi0.9Pt0.1O3 catalyst served as the most efficient catalyst. Supported perovskite catalysts (XLaNi0.9Pt0.1O3/Al2O3: X=perovskite content(wt%), 0, 10, 20, 30, 40, 50, and 100) were finally applied for the purpose of maximizing the catalytic performance of perovskite catalyst in the low-temperature oxidation reaction. Catalytic performance of XLaNi0.9Pt0.lO3/Al2O3 catalysts showed a volcano-shaped curve with respect to perovskite content. Among the catalysts tested, 20LaNi0.9Pt0.1O3/A12O3 catalyst exhibited the highest conversion of odor compounds of 88.7% at 180℃.