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안승기,최환준,이현주 대한수부외과학회 2017 대한수부외과학회지 Vol.22 No.4
Metachronous cancers were defined as those that were detected after an interval of more than 6 months. The instance of two histologically distinct sarcomas in one patient is very unusual. A 42-year-old woman presented for evaluation of a painless mass in her right axilla area. She gave a history of operation 8 years ago for treating a fibrosarcoma on her right upper arm at local clinic. Eight years ago, the lesion was widely excised. Magnetic resonance imaging revealed a new generated tumor at her right axilla. After a wide surgical resection, we performed anterolateral thigh free flap for cover the defect. Second neoplasm is leiomyosarcoma. These two neoplasms are 2 histologically distinct tumors. There is no report of a case of metachronous soft tissue sarcoma both pleomorphic leiomyosarcoma and fibrosarcoma in upper extremity within one person. We emphasize the importance of considering the possibility of metachronous sarcoma.
퍼스널 트레이닝 경험자의 사회적 체형 불안, 권력거리 신념, 그리고 트레이너의 권위적 행동에 따른 소비자 만족 차이 분석
안승기,강다희,김현우 한국체육과학회 2024 한국체육과학회지 Vol.33 No.1
The purpose of this study was to investigate the effects of social physique anxiety, power distance belief, and trainer’s autocratic behavior on consumer satisfaction in order to suggest strategies to improve competitive advantage in the highly competitive fitness industry in South Korea. For the study, a total of 332 primary data were collected by sampling members of Seoul-based S-gym who are enrolled in or have experienced personal training services. The study conducted 2 (Social Physique Anxiety) x 2 (Power Distance Belief) x 2 (Trainer's Autocratic Behavior) ANOVA to derive the results, which showed that the power distance beliefs and trainer's autocratic behavior of personal training experience had a significant effect on consumer satisfaction, and the interaction effect between social physique anxiety and trainer's autocratic behavior was found. Based on the results, practical discussions and implications are provided.
안승기 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4
독일의 패전으로 새로운 기술을 접한 열강들은 고속비행에 눈을 뜨게 되고 서둘러 천음속, 초음속 영역의 시험에 필요한 풍동 건설에 투자하게 된다. 그 후 풍동은 대량의 공력자료 생산에 적합한 설비로 항공우주산업의 중요한 자리를 차지하고 있다. 그러나 항공 산업의 개발 물량 축소와 비용절감에 대한 압박 등으로 풍동의 성장은 끝나고 유지마저도 어려운 상황으로 변하고 있다. 본 논문에서는 풍동시설의 성장과 쇠퇴에 대해 소개하고, 전산유체역학의 발전 추이와 현재 진행 중인 세계의 적용추세를 바탕으로 공력 데이터베이스의 구축방안, 향후 풍동시험의 진로 등에 대해 대안을 제시하고자 하였다. With the fall of the Third Reich and new technologies emerging, Allies began to understand the importance of high speed flight. They started to invest to build wind tunnels that they can test transonic or supersonic speed regime. Wind tunnels became "the important facilities" in aerospace industry because of their high productivity. But, with a shrink of new development programs and a strong pressure to minimize the cost, wind tunnels become facilities even hard to maintain. In this paper, a short history of the rise and fall of wind tunnels is introduced. Then, with the advance of CFD and the world trends, a new alternative in developing an Aerodynamic Data Base along with a new direction for future wind tunnel testing is suggested.
Subcutaneous Sparganosis on Abdomen Mimicking Multiple Lipomas
안승기,최환준,김준혁 대한기생충학ㆍ열대의학회 2019 The Korean Journal of Parasitology Vol.57 No.5
Human sparganosis is a food-borne zoonosis mainly caused by the plerocercoid belonging to the genus Spirometra. The most common clinical sign of sparganosis is a subcutaneous mass in the trunk including abdominal or chest wall. The mass may be mistaken for a malignant tumor, thereby causing difficulty in terms of diagnosis and treatment. A 66-year-old woman visited our clinic for the removal of a lipoma-like mass. It was movable, hard, and painless. We identified 2 white mass, measuring 0.2×4 cm and 0.2×1 cm. Pathologic findings indicated the white mass was a sparganum. She recalled having eaten a raw frog approximately 60 years before. A 35-year-old who lived North Korea was also presented to our clinic with an asymptomatic nodule on her abdomen. Intraoperatively, we found sparganum approximately 24 cm size. Subcutaneous masses are associated with clinical signs of inflammation or they may mimic a soft tissue neoplasm. While the incidence rate of sparganosis has decreased with economic development and advancements in sanitation, surgeons still encounter patients with sparganosis in the clinical setting. Therefore, a careful history is required in order to diagnose sparganosis.