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고형 장기 이식 후 발생하는 피부암과 피부암 전구증으로 최근 22년간 단일 기관을 방문한 환자들에 대한 임상 양상과 인구통계학적 고찰(1995∼2017)
박찬성 ( Chan Seong Park ),박지혜 ( Ji-hye Park ),이종희 ( Jong Hee Lee ),이동윤 ( Dong-youn Lee ),이주흥 ( Joo-heung Lee ),양준모 ( Jun-mo Yang ) 대한피부과학회 2018 대한피부과학회지 Vol.56 No.10
Background: It is well known that skin cancer and precancerous disease develop more frequently in patients undergoing solid organ transplantation than normal populations in the normal population in Western countries. However, to date, the clinical and demographic features of skin cancer and precancerous disease after solid organ transplantation are not established in Asian countries. We evaluated the clinical and demographic features of primary skin cancer and precancerous lesions after solid organ transplantation and compared these with the trends observed in Western countries. Methods: We retrospectively reviewed the medical records of patients who underwent kidney, liver, heart, and lung transplantation between January 1995 and April 2017 and who developed skin cancer or precancerous lesions after transplantation. The various lesions observed were squamous and basal cell carcinoma, malignant melanoma, Kaposi sarcoma, Bowen’s disease, and actinic keratosis. Results: We identified 4604 patients who received organ transplant. The mean age of patients was 44.8 years (male, 64.6%; female, 35.4%), and the sum of the person-year of observation time was 31,024 person-years. The incidence rate per 100,000 person-years was 29.01 for squamous cell carcinoma, 19.34 for basal cell carcinoma, 6.45 for malignant melanoma 3.22 for Kaposi sarcoma, and 74.17 for Bowen’s disease and actinic keratosis. The incidence rate per 100,000 person-years was the highest in patients undergoing heart transplantation (610.50), followed by those who underwent kidney transplantation (136.54) and liver transplantation (90.15). Koreans showed lower incidence rates than those observed in Westerners. Conclusion: The incidence of primary skin cancer and precancerous lesions after solid organ transplantation in Koreans was lower than that in Westerners. Squamous cell carcinoma was the most common skin cancer in patients undergoing solid organ transplantation and the incidence rate of skin cancer and precancerous lesions was the highest in patients undergoing heart transplantation. (Korean J Dermatol 2018;56(10):603∼608)
전승원 ( Seung Won Jeon ),박찬성 ( Chan Seong Park ),김윤호 ( Yoon Ho Kim ),이규정 ( Kyu Jung Lee ) 한국안전학회 2009 한국안전학회지 Vol.24 No.4
침식마모로 인하여 손상되어 차량화재를 유발한 차량용 워터펌프의 성능저하를 CFX프로그램을 이용하여 해석하였다. 손상에 따른 성능저하를 해석하기 위하여, 블레이드의 굽힘변형과 간극의 증가를 고려하였다. 캐비테이션 해석 시에는 포화증기 발생과 응축 과정을 모델링하기 위하여 Rayleigh-Plesset 모델을 적용하였다. A flow analysis for the erosion-corrosion damaged automotive water pump which causes vehicle fire is numerically performed using the CFX program, computational fluid dynamics (CFD) code. The blade bending deformation and the blade clearance enlargement are considered in the analysis of performance reduction. For the cavitation analysis, the homogeneous multi phase model is adopted using the Ralyleigh-Plesset model for the rate equation controlling vapor generation and condensation.
정지민(Ji Min Jung),박찬성(Chan Seong Park),박재원(Jae Won Park),최경민(Kyeong Min Choi),신병록(Byeong Rog Shin) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this paper an air floated wind power generation system is designed and manufactured to investigate performance characteristics and efficiency of wind turbine. A floating body of Magenn's actual running used and modified by using similarity law. From the experiments, it was found that the wind turbine has a performance characteristics indicating maximum peak of power at velocity ratio of 1.5 by circumferential velocity and main stream, and at the given wind speed such as 7㎧ and 7.5㎧.