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횡문근 융해증이 발생한 농약중독 환자에서 급성 신부전 발생의 연관요인
강창우,이경우,정진희,강태신,김동훈,김성춘,박인성,Kang, Chang-Woo,Lee, Kyung-Woo,Jung, Jin-Hee,Kang, Tae-Shin,Kim, Dong-Hoon,Kim, Sung-Choon,Park, In-Sung 대한임상독성학회 2009 대한임상독성학회지 Vol.7 No.2
Purpose: Rhabdomyolysis is one of the most important complications of pesticide intoxication. It affects a patient's clinical prognosis and can cause acute renal failure. It is important that patients diagnosed with pesticide intoxication receive an accurate initial diagnosis and proper treatment to prevent significant complications. This study's objective was to investigate and confirm related factors causing acute renal failure by verifying clinical observations and laboratory findings collected following pesticide intoxication. Methods: A retrospective analysis was made of 734 patients who presenting to our emergency medical center after ingesting pesticides between January 2006 and December 2008, Of these, 513 patients were selected for the study. Two hundred and twenty-one patients were excluded because of paraquat intoxication, age (if under 18), or chronic renal failure. Seventy-four patients were diagnosed with rhabdomyolysis, based on serum creatinine phosphokinase levels were > 1,000U/L. Acute renal failure was diagnosed when creatinine levels were > 2.0 mg/dL. Results: Among the 74 patients diagnosed with rhabdomyolysis, 26 (35.1%) experienced acute renal failure. The most meaningful related factor in the prediction of acute renal failure was initial arterial pH and creatinine level. Conclusion: Initial arterial pH and creatinine level are predictors of complications such as acute renal failure in patients with rhabdomyolysis.
몬테카를로 방사선 수송 모델을 활용한 우주방사선 차폐체 설계 관련 선행연구
강창우,김영찬,Kang, Chang-Woo,Kim, Yeong-Chan 한국방사선학회 2022 한국방사선학회 논문지 Vol.16 No.5
The radiation shielding characteristic of neutron shielding material has been studied as the preliminary study in order to design cosmic-ray shielding material. Specially, Soft Magnetic Material, known to be effective in EMP and radiation shielding, has been investigated to check if the material would be applicable to cosmic-ray shielding. In this work, thermal neutron shielding experiment was conducted and the Monte Carlo N-Particle(MCNP) was applied to employ skymap.dat, which is cosmic-ray data embedded in MCNP. As a result, polyethylene, borated polyethylene, and carbon nano tube, containing carbon or hydrogen, have been found to be effective in reduction of neutron flux below 20 MeV (including thermal, epithermal, evaporation). In contrast, the materials composed of iron such as SS316 and Soft Magnetic Material show a good shielding performance in the cascade energy range (above 20 MeV). Since Soft Magnetic Material is consisting of 13% of boron, it can also decrease thermal neutron flux, so it is expected that it would show a significant reduction on the entire range of neutron energy if the Soft Magnetic Material is used with hydrogen and carbon, so called low Z material.
강창우(Kang, Chang-Woo),양승우(Yang, Seung-Woo) 서울시립대학교 서울학연구소 2014 서울학연구 Vol.- No.57
A Study on the traits of urban tissue in northeast Gyungseong during the Japanese colonial era. The purpose of this study is to find out the characteristics of urban tissue formation in northeast Gyungseong during the Japanese colonial era by the analyzing relationship between urban planning projects and creating the village area. Beginning in the 1920s the lack of available housing coupled with rising populations results in the creation of villages in the Gyungseong area. In particular, urban development was performed in the northeast area of Gyungseong, and caused the transformation of its urban tissue, there still remains that kind of form now. Some projects concerning the urban planning I described below made constructing villages in the north area possible. In 1912, the implementation of city street improvement projects in Gyungseong was the basis of urban traffic networks. As a result, city street improvement added roads heading north and south by implementing the number 11 electric car line 11, and roads from the center of the city to the northeast area by creating lines 10, 11. In 1934, according to Gyungseong town planning started, many roads were widened. Two town planning were created in northeast. As a result, electric car lines and bus lines widened. People could go from the center to the suburban districts easily, this lead to the quick urbanization of the northeastern area. In 1939, the opening of two electric lines, a bus line and extending a bus line made accessibility to city hall easy. The completion of an town planning created the mobility that enabled the citizens with their range of activity. This lead to substantial regional economy growth. Therefore, in the northeastern area of Gyeongseong, villages were created because of the convenient form of transportation, and the appropriate location for citizens to live not far from the central business districts.
서부 경남 지역 외상 환자의 임상적 양상에 대한 기술적 연구
강창우 ( Chang Woo Kang ),박인성 ( In Sung Park ),김동훈 ( Dong Hoon Kim ) 대한외상학회 2005 大韓外傷學會誌 Vol.18 No.2
Purpose: This study was conducted to gather descriptive data on trauma victims and to observe the general demographic characteristics and clinical profile of trauma victims who were admitted to a regional emergency medical center in the west southern Kyungsangnam-do area. Objects & Method: The study population consisted of 1,909 trauma patients who visited the emergency department of Gyeongsang National University Hospital between January 2003 and December 2004. The medical records were reviewed in a retrospective manner. Demographic data, the mechanism of injury, and clinical information were collected by three professional medical affairs recorders and an emergency physician and a Revised Trauma Score (RTS) and an Injury Severity Score (ISS) were calculated for each patient. Collected data were analyzed with SPSS software version 12.0. Results: Male patients outmembered female patients (M:F=2.54:1), and the mean age of the population was 40.5±21.4 years. The mean RTS and ISS were 7.45±1.11 and 8.40±7.44, respectively. The seventies showed the highest ISS(10.94±8.66). The most common mechanism of injury was motor-vehicle accidents (45.57%), followed by falls or slips(28.26%), and other blunt injuries(12.68%). The most frequent causes of death was cerebral herniation due to head injury(68.4%) and irreversible shock(26.3%). Conclusion: The present study clarified the demographic and clinical characteristics of trauma patients in the Kyungsangnam-do area. In the future, prospective clinical data collection is needed for a more sophisticated trauma study.
반경방향으로의 온도구배가 Circular-Couette 유동에 미치는 영향
강창우(Chang-Woo Kang),양경수(Kyung-Soo Yang),Innocent Mutabazi 한국전산유체공학회 2009 한국전산유체공학회지 Vol.14 No.3
Numerical simulation has been carried out to investigate the influence of radial temperature gradient on the Circular-Couette flow. Varying the Grashof number, we study the detailed flow and temperature fields. The current numerical results show good agreement with the analytical and experimental results currently available. It turns out that spiral vortices are generated by increasing temperature gradient. We classify the flow patterns for various Grashof number based on the characteristics of flow fields and spiral vortices. The correlation between Richardson number with wave number shows that the spiral angle and size of spiral vortices increase with increasing Richardson number.
강창우(Chang Woo Kang),김상우(Sang Woo Kim) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
FPD(Flat Panel Display) 반송 장치의 특성상 주기적인 Maintenance가 어려우며 단 하나의 Unit 의 고장 발생으로도 치명적인 Loss를 유발함으로 사후 대응이 아닌 사전진단을 통한 예방 모듈을 개발하고자함.
실린더의 회전 주파수 진동이 Taylor 와류에 미치는 영향
강창우(Chang-Woo Kang),양경수(Kyung-Soo Yang),Innocent Mutabazi 한국전산유체공학회 2009 한국전산유체공학회지 Vol.14 No.3
We study time-periodic Taylor-Couette flow with the outer cylinder at rest and the inner one oscillating with a mean angular velocity. Varying the frequency of inner cylinder, we investigate the change of Taylor vortices at a given amplitude and a mean angular velocity. With a small frequency of modulation, we find that Taylor vortices appear and disappear periodically. With a higher frequency, Taylor vortices do not disappear, but the intensity of Taylor vortices modulates periodically. As the frequency increases, Taylor vortices modulate harmonically.
반경방향으로의 온도구배가 Taylor-Couette 유동에 미치는 영향
강창우(Chang-Woo Kang),양경수(Kyung-Soo Yang),윤동혁(Dong-Hyeog Yoon) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Numerical simulation has been carried out to investigate the influence of radial temperature gradient on the Taylor-Couette flow. Varying the Grashof number, we study the detailed flow. The current numerical results show good agreement with the experimental results currently available. It turns out that spiral vortices are generated by increasing temperature gradient.
반경방향으로의 온도구배가 Taylor Vortex에 미치는 영향에 대한 수치적 연구
강창우(Chang-Woo Kang),양경수(Kyung-Soo Yang),윤동혁(Dong-Hyeog Yoon) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.11
Numerical simulation has been carried out to investigate the influence of radial temperature gradient on the Taylor Vortex flow. Varying the Grashof number, we study the detailed flow and temperature fields. The current numerical results show good agreement with the experimental results currently available. It turns out that wavy spiral vortices are generated by increasing temperature gradient. We classify flow patterns for various Grashof numbers based on the characteristics of flow fields and spiral vortices. The correlation between Grashof number with wave number shows that the spiral angle and size of Taylor vortices increase with increasing temperature gradient. Temperature gradient does not have a great influence on the heat transfer rate of the cylinder surfaces.