Serum Protein Values of Racehorse in Korea

이창우,이성엽,이승모,엄영호,Lee Chang-Woo,Lee Sung-Yub,Lee Sung-Mo,Eom Yeong-Ho The Korean Society of Veterinary Clinics 1987 한국임상수의학회지 Vol.4 No.2

임상적으로 건강하고 휴식상태에 있는 한국 경주마의 혈청단백질치를 조사하였다. 총단백질농도는 6.5$\pm$0.3g/100ml(평균$\pm$표준편차)이였다. 알부민 농도는 3.4$\pm$0.2, $\alpha$-글로부린 농도는 0.8$\pm$0.1, $\beta$-글로부린 농도는 1.2$\pm$0.2, ${\gamma}$-글로부린 농도는 1.1$\pm$0.3g/100ml이었으며, A/G 비는 1.15$\pm$0.21이었다. 성, 연령, 계절에 따르는 혈청단백질치의 차이를 통계적으로 분석하여 보고하였다.

산업동물 임상체계 재구축

이창우,Lee, Chang-U 대한수의사회 2007 대한수의사회지 Vol.43 No.1

사슴의 출혈성패혈증예

이창우,Lee Chang Woo 대한수의사회 1978 대한수의사회지 Vol.14 No.2

An outbreak of hemorrhagic septicemia was reported in a herd of 25 Formosan deer and 27 elks, 3 of Formosan deer and 4 of elks died of it. Clinically they were characterized by dullness, anorexia, loss of rumination, bloody and mucous soft feces, and sudd

의과대학 여학생 증가에 따른 수련교육 변화의 필요성

이창우,Lee, Chang-Woo 연세대학교 의과대학 2011 의학교육논단 Vol.13 No.2

Women's educational opportunities have been increasing and women's general advancement in higher education is the underlying factor behind the increasing number of female students in medical school. A number of issues affect female students and residents, including the existence of gender bias and sexual harassment, higher stress levels and lower levels of work satisfaction, the lack of role models in academic medicine, and conflict between work and family roles, including challenges surrounding having children. To what extent female and male medical students and residents make different career and life style choices is also an important issue. The shortage of doctors in surgical departments and maldistribution among specialties are of great concern in the health care system and medicine's future. We must prepare to solve these problems. New medical policies and educational approaches are needed for the future.

역사기록서 고찰을 통한 조선시대 산사태 특성 분석

이창우,서준표,강영호,Lee. Changwoo,Seo. Junpyo,Kang. Youngho 한국방재학회 2013 한국방재학회논문집 Vol.13 No.6

본 연구는 조선시대 산사태 발생현황과 특성에 대해서 현시대와 비교 분석하였다. 본 연구에 활용된 역사기록서는 조선왕조실록, 승정원일기, 비변사등록으로 이들 역사기록서에서 산사태, 토석류, 낙석을 포함하는 기록들을 고찰하였다. 조선시대 산사태 발생 원인은 강우가 81%로 가장 높았고, 50년 단위연도별 발생비율은 호우빈도와 유사한 결과로 나타났다. 그리고 월별산사태 발생 피해비율은 8월(30.7%), 7월(22.9%) 9월(18.8%) 순으로 나타났다. 또한 지역별 산사태 발생 피해비율은 강원도(16.3%), 서울(14.4%), 경기도 (13.4%), 경상북도(11.4%), 경상남도(10.9%) 순으로 나타났다. 결론적으로 조선시대의 산사태 특징은 발생원인과 빈발하는 월이 현재와 유사하였다. 또한 지역에 따른 피해발생비율도 유사점은 있었으나, 도심지에서는 다소 차이가 나타났다. 이러한 결과는 미래의 산사태 연구방향 및 정책수립에 대한 기초자료로 활용될 것으로 판단된다. In this study, the characteristic and occurrence on landslide of Joseon Dynasty were analyzed in order to compare with those of the present. Using the historical records on the Annals of Joseon Dynasty(朝鮮王朝實錄). The daily records of royal secretariat of Joseon Dynasty(承政院日記) and Bibyeonsadeungnok(備邊司謄錄), the record of landslide, debris flow and rockfall of Joseon Dynasty was investigated. The major cause of landslide of Joseon Dynasty was rainfall that was occupied by 81%, the ratio of landslide occurrence per 50 years was similar to frequency of torrential rain for same period. The ratio of landslide damage by month was the highest in August(30.7%) and the next was the July(22.9%) and September(18.8%) in order. And the ratio of landslide damage by region was the highest in Kangwon province(16.3%) and the next was the Seoul city(14.4%), Gyeonggi(13.4%), Gyeongbuk(11.4%), Gyeongnam(10.9%) province in order. The result show that causes, occurrence period and the damage ratio by regional on landslide of Joseon Dynasty were similar to those of the present, but there was a little difference in the city area. These results will be helpful to predict landslide trend in the future and set up policy countermeasures for landslide.

엣지 컴퓨팅에서 트래픽 분산을 위한 흐름 예측 기반 동적 클러스터링 기법

이창우,Lee, Chang Woo 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.8

This paper is a method for efficient traffic prediction in mobile edge computing, where many studies have recently been conducted. For distributed processing in mobile edge computing, tasks offloading from each mobile edge must be processed within the limited computing power of the edge. As a result, in the mobile nodes, it is necessary to efficiently select the surrounding edge server in consideration of performance dynamically. This paper aims to suggest the efficient clustering method by selecting edges in a cloud environment and predicting mobile traffic. Then, our dynamic clustering method is to reduce offloading overload to the edge server when offloading required by mobile terminals affects the performance of the edge server compared with the existing offloading schemes.

이달의 책, 이달의 저자 깊이 읽기

이창우,Lee, Chang-U 대한출판문화협회 2006 출판저널 Vol.364 No.-

장대도로터널의 자연환기력 예측 사례연구

이창우,김상현,길세원,조우철,Lee, Chang-Woo,Kim, Sang-Hyun,Gil, Se-Won,Cho, Woo-Chul 한국터널지하공간학회 2009 한국터널지하공간학회논문집 Vol.11 No.4

장대터널의 환기 및 방재시스템 설계시 주요한 요소설계인자 중 하나인 자연환기력은 그 중요성에도 불구하고 관련 영향변수들의 상호관계는 정량화가 매우 복잡하여, 자연환기력에 의한 유입 자연풍에 관한 설계기준을 정량적 근거하에서 제시하고 있지 못하다. 최근 발생한 터널화재에 의한 문제 및 터널 이용자에 의한 보다 나은 공기질에 대한 요구 등으로 터널 환기시스템의 최적화가 시급히 필요하며, 따라서 최적화의 주요 설계인자인 자연환기력에 대한 연구가 절실히 요구된다. 본 연구에서는 국내 최장대 도로터널로 계획된 인제터널(연장 10.9 km)을 대상으로 자연환기력의 예측을 목적으로 하였다. 지형적 요인에 의한 외부풍의 풍압에 기인하는 자연환기력의 최대 가능수준을 예측할 수 있는 기압장벽고의 개념을 적용하여 외부풍에 의한 자연환기력을 추정하고 터널내외부 공기 밀도차로 인한 굴뚝효과에 따른 자연환기력을 동시에 분석하였다. One of the key design factors for the ventilation and safety system at extra long tunnel is the airflow velocity induced by the natural ventilation force. Despite of the importance, it has not been widely studied due to the complicated influencing variables and the relationship among them is difficult to quantify. At this moment none of the countries in the world defines its specific value on verified ground. It is also the case in Korea. The recent worldwide disasters by tunnel fires and demands for better air quality inside tunnel by users require the optimization of the tunnel ventilation system. This indicates why the natural ventilation force is necessary to be thoroughly studied. This paper aims at predicting the natural ventilation force at a 11 km-long tunnel which is in the stage of detailed design and will be the longest vehicle tunnel in Korea. The concept of barometric barrier which can provide the maximum possible natural ventilation force generated by the topographic effect on the external wind is applied to estimate the effect of wind pressure and the chimney effect caused by the in and outside temperature difference is also analyzed.

소의 호흡기 감염증에 대한 Danofloxacin과 Oxytetracycline의 효과 비교

이창우,김본원,김철규,조영웅,Lee Ghang-Woo,Kim Bonn-Won,Kim Cheol-Kyu,Jo Yong-Woong 한국임상수의학회 1993 한국임상수의학회지 Vol.10 No.1

A total of 108 Holstein calves with an average body weight of l19kg was studied in 4 farms in middle region of South Korea in late Autumn from November 8 to 27, 1991. Individuals were selected for treatment when they exhibited acute signs of pneumonia and had a rectal temperature of$\geq$4$0^{\circ}C$. Each animal received intramuscularly either danofloxacin at 1.25mg/kg once daily or oxytetracycline at 10mg/kg once daily for three consecutive days. The individuals which had a rectal temperature of$\geq$39.5$^{\circ}C$ at 24 hours after the third treatment received two further treatments. Treatment for three or five days with danofloxacin was very efficacious and superior to oxytetracycline in the treatment of calve pneumonia. Eighty-six per cent of 58 danofloxacin treated calves and sixty-six per cent of 50 oxytetracycline teated calves responded successfully to treatment for three days and the difference between treatment groups was highly significant. Danofloxacin was more efficacious than oxytetracycline in rapid and complete control of pyrexia and in resolution of clinical signs. The minimum inhibitory concentration of danofloxacin for Pasteurella hemolytica and Pasteurella multocida was equally 0.12~0.50 mcg/$m\ell$ while that of oxytetracycline for Pasteurella hemolytica and Pasteurella multocida was 2.0~4.0 and 4.0~16mcg/$m\ell$, respectively. During the treatment period side effect was not found in all animals of both treatment groups except some animals receiving oxytetracycline showed pain at the site of injection.

터널의 기하학적 형태 및 캐노피 설치가 터널 환기 및 화재 확산에 미치는 영향 분석

이창우,서기윤,김정욱,Lee, Chang-Woo,Suh, Ki-Yoon,Kim, Jung-Wook 한국터널지하공간학회 2006 한국터널지하공간학회논문집 Vol.8 No.4

시계조절이나 설해방지 목적으로 설치되는 캐노피 구간 내에서의 기류유동특성의 이해는 정상환기 뿐만 아니라 비상시 대처방안 강구를 위한 요건이다. 또한 터널 방재시스템 설계를 위하여서는 종단구배, 평면선형, 단면크기 및 형태 등과 같은 터널의 다양한 특성이 화재확산에 미치는 영향에 대한 정량적인 이해가 필요하다. 본 연구에서는 국내도로터널의 전형적인 특성을 적용한 터널에 캐노피가 된 경우와 종단 및 선형구배, 단면적 및 형태, 곡선구간이 환기 및 화재확산에 미치는 영향을 CFD분석함을 목적으로 하였다. 분석결과 145m길이의 캐노피인 경우 50%정도의 개구율이 기류유동 패턴 및 환기효과면에서 가장 바람직하였다. 1.8km 터널내에서 20MW 화재발생시 종단구배는 풍속분포와 화재연 확산에 큰 영향을 미치며 제트팬$({\varnothing}1250)$ 4대를 가동한 경우 화재발생 후 5분 경과시 하류 40m지점 부근에서의 화재연 농도는 +2% 구배에서는 13% 감소, -2% 구배의 경우에는 20%정도 증가하며 또한 backlayering거리가 45m정도에 달한다. 직사각형 단면터널의 경우, 화재연 농도 및 풍속분포는 말굽형 터널과 비교하여 현저한 차이가 관찰되지 않는다. 3차선 터널에서는 이들 변수는 모두 감소하며 100초 경과시 50m 정도의 backlayering을 보이며 이후 서서히 감소한다. 곡선터널인 경우는 화재연의 확산이 느리며 100초 경과시 50m에 달하던 backlayering현상은 급격히 사라진다. Understanding the airflow characteristics within the canopy structure installed between closely adjacent tunnels either for light adaptation or for protection from snow hazards is required for the normal ventilation as well as safety system design. Grade, horizontal alignment, cross-sectional area and shape are known to substantially influence the fire smoke behavior and their influences raise great concern for the safety design. This paper aims at studying the effects of tunnel geometrical characteristics and canopy installation on the ventilation and fire propagation through CFD analysis. In the case of 145m long canopy, 50% opening ratio is preferred with respect to the airflow pattern and ventilation efficiency. When a 20MW fire occurs in a 1.8km-long tunnel and four 1250mm reversible jet fans are instantly turned on, smoke concentration at 40m downstream of the fire decrease 13% for the upgrade tunnel with 2% gradient and increases 20% for -2% gradient, compared to the standard horizontal tunnel. Backlayering is observed within 45m-long segment toward the entrance in 2% down-graded tunnel. In a rectangular tunnel, there is no significant difference of smoke concentration as well as velocity profile from the standard crown tunnel. Three-laned tunnel shows lower level of both profiles and backlayering is detected up to 50m upstream of the fire, while the risky situation rapidly disappears thereafter.