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유태훈(Taehoon Yoo),유사무엘(Samuel Yu),안현식(Hyun-Sik Ahn) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
In this paper, the power losses in the pump motor drive circuit of the ESC system are calculated according to the functions of ABS, ESC, and TCS. The losses calculated here are the conduction loss and the switching loss which are typically considered in the loss analyses for MOSFETs. This paper shows the simulation of the thermal fluctuation of a MOSFET by applying calculated losses. The performance of the motor drive circuit can be predicted by performing thermal simulations for each function of the ESC system. Reliability can also be estimated by simulating the maximum environmental temperature condition of the ESC system and, moreover, the pump motor drive circuit can be optimally designed without performing real experimentation.
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변지용(Byeon, Ji Yong),이미경(Lee, Mi Kyung),정재연(Chung, Jae Youn),유사무엘(Yoo, Samuel),전용관(Jeon, Justin Y.) 대한종양간호학회 2019 Asian Oncology Nursing Vol.19 No.2
Purpose: The purpose of this study was to investigate the exercise participation experiences of colorectal cancer survivors. Methods: A phenomenological method was used in this study. Ten adult colorectal cancer survivors were recruited and data were collected through in-depth interviews. Results: The factors involved in the experiences of colorectal cancer survivors’ exercise participation were categorized into 3 parts: (1) mental depression and isolation due to physical change, (2) barriers of exercise, (3) exercise participation for recovery. Though participants were aware of their changed body after cancer treatment and faced difficulties participating in exercise, they want to overcome these challenges through exercise participation. Conclusion: The results of this study show the exercise participation experiences of colorectal cancer survivors. Based on these findings, exercise maintenance can be promoted more effectively, and a higher exercise adherence of colorectal cancer survivors can be achieved.
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소아청소년암 생존자의 운동 경험과 운동 제약에 대한 질적 사례연구
김지영 ( Kim Ji Young ),연수진 ( Yeon Su Jin ),변지용 ( Byeon Ji Yong ),유사무엘 ( Yoo Samuel ),유철주 ( Lyu Chuhl Joo ),전용관 ( Justin Y. Jeon ) 한국보건사회연구원 2021 保健社會硏究 Vol.41 No.4
본 연구는 아동·청소년 시기에 암을 진단받은 소아청소년암 생존자의 개별적인 운동 경험과 운동 제약을 파악하고, 공통적으로 나타나는 이슈와 실천적 함의에 대해 심층적으로 탐색하고자 하였다. 소아청소년암을 진단받고 치료를 완료한 9명의 청소년을 연구 참여자로 선정하였으며, 개인별 특수성을 이해하기 위해 질적 사례연구로 진행되었다. 개방형 질문을 사용하여 심층 면담을 1대1로 실시하였다. 운동 경험은 ‘발병 전 운동 경험’, ‘발병 후 운동 경험’으로 분류되었다. 참여자들은 암 발병 전에는 일반 청소년들과 다름없는 운동 경험을 가지고 있었지만, 진단 이후 치료 기간에 급격하게 신체활동량이 감소하였으며, 암 치료가 종료된 이후에도 이전과 같이 충분한 운동 참여를 하지 못하고 있었다. 참여자가 경험하는 운동 제약은 함께 운동할 친구 혹은 장소 부족과 같은 ‘환경적 제약 요인’과 낮은 체력 혹은 치료 후유증과 같은 ‘신체적 제약 요인’으로 분류되었다. 이러한 운동 제약으로 말미암아, 참여자들은 신체 활동 권고량을 충족하지 못하고 있었으며, 비활동적인 생활 습관을 가지고 있었다. 향후 소아청소년암 생존자의 운동 경험과 제약을 깊이 있게 이해하고, 이들이 운동에 활발하게 참여할 수 있도록 지역 사회와 학교에서 다양한 방안을 모색해야 할 것이다. The purpose of this study was to identify the exercise experience and perceived exercise barriers of childhood cancer survivors diagnosed with cancer in childhood and adolescence, and to explore common issues and practical implications in depth. Nine adolescents who were diagnosed with childhood cancer and completed treatment were selected as study participants, and a qualitative case study was conducted to understand individual characteristics. In-depth interviews were conducted one-on-one using open-ended questions. Our results showed that the exercise participation experience was classified as ‘exercise experience before diagnosis cancer’ and ‘exercise experience after diagnosis cancer’. Before cancer diagnosis, participants of the study experienced similar exercise and physical activity (PA) participation as children and adolescents without cancer. However, during cancer treatment, their PA participation decreased dramatically, even after cancer treatment, participants do not recover their pre-diagnosis PA levels. Exercise barriers which they experienced were classified into ‘environmental constraint factors’ such as lack of exercise partner and facilities, and ‘physical constraint factors’ such as such as low fitness levels and side effect of cancer treatment. Due to these exercise barriers, participants did not meet the recommended amount of PA levels for adolescents and had an inactive lifestyle. Based on the in-depth understanding of the exercise participation experience and exercise barriers of childhood cancer survivors, various methods will be proposed about participation in regular exercise in local communities and schools for childhood cancer survivors.
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