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육군항공 회전익 조종사의 CRM 역량에 미치는 리더십 영향 연구
윤경섭,김현덕 한국항공운항학회 2024 한국항공운항학회지 Vol.32 No.4
Approximately 48% of Army aviation accidents are attributed to human factors, making it the most significant cause of these incidents. Army aviation helicopter pilots are composed of both officers and warrant officers, yet there is a lack of prior research specifically focused on leadership within this group. Additionally, studies examining the impact of leadership on Crew Resource Management (CRM) within Army aviation are also scarce. Due to differences in leadership training, it is expected that there will be distinct differences in empowering leadership between officers and warrant officers piloting Army helicopters, and that differences in flight experience will lead to varying CRM competencies based on flight qualifications. This study aims to identify the differences in empowering leadership between officers and warrant officers, analyze the differences in CRM competencies based on flight qualifications, and predict how empowering leadership influences their CRM competencies.
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윤경섭,최소론,김정아,홍정인,김정호,박상융 고신대학교(의대) 고신대학교 의과대학 학술지 2018 고신대학교 의과대학 학술지 Vol.33 No.2
Knotting of a pulmonary artery catheter (PAC) is a rare, but well-known complication of pulmonary artery (PA) catheterization. We report a case of a double-knotted PAC with a large loop in a patient with hepatocellular carcinoma (HCC) undergoing liver transplantation, which has been rarely reported in the literature. A PAC was advanced under pressure wave form guidance. PAC insertion was repeatedly attempted and the PAC was inserted 80 cm deep even though PAC should be normally inserted 45 to 55 cm deep. However, since no wave change was observed, we began deflating and pulling the balloon. At the 30-cm mark, the PAC could no longer be pulled. Fluoroscopy confirmed knotting of the PAC after surgery (The loop-formed PAC was shown in right internal jugular vein); thus, it was removed. For safe PA catheterization, deep insertion or repeated attempts should be avoided when the catheter cannot be easily inserted into the pulmonary artery. If possible, the insertion of PACs can be performed more safely by monitoring the movement of the catheter under fluoroscopy or transesophageal echocardiography.
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윤경섭,김미진,김무한 한국응용과학기술학회 2018 한국응용과학기술학회지 Vol.35 No.4
In this study, we investigated collagen production and hyaluronic acid production effects for wrinkle improvement test on 50 kinds of land plants and 10 kinds of marine plants native to Jeju Island as a part of developing customized cosmetic materials. Collagen and hyaluronic acid are recognized as major factors affecting skin aging. Cerastium holosteoides var. hallaisanense Mizushima extract (100 μg /mL) produced more than 190% of collagen in the extracts of 50 kinds of land plants. Vicia angustifolia var. segetilis K. Koch. extract (100 μg/mL) produced more than 160% of collagen. Ftsia japonica Decne. et Planch. extract (100 μg/mL), Euonymus japonica Thunb. extract (100 μg/mL), Suaeda malacosperma H.Hara extract (100 μg/mL), Elaeagnus umbelellata Thunb. extract (100 μg/mL), Sedum oryzifolium Makino extract (100 μg/mL), Vicia unijuga A. Br. extract (100 μg/mL), and Brassica juncea var. integrifolia Sinsk. extract (100 μg/mL) showed more than 140% collagen production effect. Among the 10 species of marine plants, Sargassum macrocarpum C. Agardh extract (50 μg/mL) produced more than 190% of collagen, and Carpopeltis angusta (Harvey) Okamura extract (100 μg/mL), Codiumcoactum Okamura extract (100 μg/mL), and Codium tenuifolium S. Shimada, T. Tadano & J. Tanaka extract (100 μg/mL) showed more than 140% collagen production. Suaeda malacosperma H.Hara extract (100 μg /mL) showed the effect of producing hyaluronic acid more than 140%, and Ftsia japonica Decne. et Planch. extract (20 μg/mL) and Wistaria floribunda A.P. DC extract (100 μg/mL) showed more than 130% hyalunonic acid production effect. Among the 10 species of marine plants, Peyssonnelia capensis Montagne extract (100 μg/mL) was the most effective. Carpopeltis angusta (Harvey) Okamura extract (100 μg/mL), Codiumcoactum Okamura extract (100 μg/mL), and Codium tenuifolium S. Shimada, T. Tadano & J. Tanaka extract (100 μ g/mL) showed more than 120% hyalunonic acid production. Jeju resources, which have good collagen and hyaluronic acid production, showed the potential to be applied to solve the skin troubles of customized cosmetics in the future. 본 연구에서 최근 한국 제주 지역에서 큰 관심을 보이고 있는 맞춤형화장품 소재 개발 일환으로서 제주도에서 자생하는 육상식물 50종과 해상식물 10종에 대해 주름개선 검증을 위한 콜라겐 생성 효과와 히알루론산 생성 효과를 조사하였다. 콜라겐과 히알루론산은 피부 노화에 영향을 주는 주요 요인으로 인식되고 있다. 실험 결과, 육상식물 50종 추출물 중에서 점나도나물추출물(100 μg/mL)은 190% 이상 콜라겐을 생성 하였으며, 살갈퀴추출물(100 μg/mL)은 160% 이상, 팔손이추출물(10 μg/mL), 금사철추출물(100 μ g/mL), 기수초추출물(100 μg/mL), 보리수나무추출물(100 μg/mL), 땅채송화추출물(100 μg/mL), 나비 나물추출물(100 μg/mL), 갓추출물 (100 μg/mL)은 140% 이상 콜라겐 생성 효과를 보였다. 해상식물 10 종 추출물 중에서는 큰열매모자반추출물(50 μg/mL)이 190% 이상 콜라겐을 생성하였으며, 붉은뼈까막살 추출물(100 μg/mL), 누운청각추출물(100 μg/mL), 우단청각추출물(100 μg/mL)의 경우는 140% 이상 콜라겐 생성 효과를 보였다. 제주 육상식물 50종 추출물 중에서 기수초추출물(100 μg/mL)이 140% 이상 히알루론산 생성 효과를 보였으며, 팔손이추출물(20 μg/mL), 등나무추출물(100 μg/mL)은 130% 이상의 히알루론산이 생성 효과를 나타냈다. 해상식물 10종 추출물 중에서는 자루바다표고추출물(100 μg/mL)이 가장 효과가 좋았 으며, 이 외에도 붉은뼈까막살추출물(100 μg/mL), 누운청각추출물(100 μg/mL), 우단청각추출물(100 μg/mL)에서 120% 이상 히알루론산 생성 효과를 보였다. 이들 콜라겐과 히알루론산 생성 효과가 양호한 제주 자원들은 향후 맞춤형화장품의 피부 고민을 해결 하는 데 적용될 수 있는 가능성을 보여 주었다.
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직류전동기에서 저주파 부하외란에 강인한 선형 모델추종제어기 설계
윤경섭,이치환,권우현 대한전자공학회 1998 전자공학회논문지T Vol.t35 No.1
PI controller has been used in the servo system. However the time response of the system designed using the PI control scheme does not provide with desirable time response in case of variation in system parameters or perturbation like a torque disturbance. LMFC(Linear model following controller) is being used to make the response of the system follow that of the model even though the parameter variation or the perturbation occurs. In this paper, a design method, RMFC(Robust Model Following Controller) is proposed, which use an auxiliary model in addition to the LMFC, which affords robustness against the low frequency load torque disturbance. The proposed method is more useful to rejecting the low frequency torque disturbance than LMFC. Proposed method is verified by simulation and experiment.
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