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이윤갑(Lee, Yoon-Gap) 계명대학교 인문과학연구소 2013 동서인문학 Vol.0 No.47
This essay deals with Lee Seung Hee’s national movement. He was born in 1847 in the Confucian scholar family. He took methodical study about Confucianism that led him to the national movement. Also his movement was based upon the theory of Anti-Western Culture. The national movement was developed to make public appeals for Anti-Japan, presented a public appeals about Anti-Western culture, the campaign for a national debt redemption, and developed private diplomacy struggle until his asylum. His national movement was developed to set wholesome Confucianism atmosphere in Korea for popular stability, and to keep the sovereignty by diplomacy struggle. Lee Seung Hee sought asylum to Russia in 1907 after Emperor Gojong was abdicated by Imperialistic Japan. He met Lee Sang Sul who was a secret envoy for the Hague convention in Vladivostok. They discussed method of the national movement. Lee Seung Hee thought method of the national movement and built national movement bases in overseas country by Anti-Western culture. His purpose was the reconstruction of the Korean empire government. He moved to Andong and continued the national movement with the Beijing general Kongjiaohui. He thought the Beijing general Kongjiaohui united as an ideological and political pivot for Koreans in China. But He didn’t totally accepted K’ang Yu-Wei’s Grand-Unity. Because it had many differences with orgin-Confucianism. Also Lee Seung Hee wanted to develop center of the Beijing general Kongjiaohui in Andong with origin-Confucianism. Lee Seung Hee’s national movement was finished by his death in 1916. However his national movement was continued by Confucian scholars in Sungju whom he had contacted during his asylum. And they developed his national movement to the 3.1 independence movement in 1919 and the independence declaration movement in the Versailles Peace Conference.
실험동물 랫드를 이용한 미세먼지 기도노출에 따른 호흡기계 독성에 대한 마늘의 예방효과 탐색
이윤범(YoonBum Lee),김근우(GeunWoo Kim),송영민(YoungMin Song),한영훈(YoungHoon Han),하창수(ChangSu Ha),이지선(JiSun Lee),김민희(MinHee Kim),손혜영(HyeYoung Son),이기용(GiYong Lee),허 용(Yong Heo),김창열(ChangYul Kim) 한국환경보건학회 2020 한국환경보건학회지 Vol.46 No.6
Objectives: Exposure to fine dust (PM10) could contribute to the occurrence of cardiovascular disease or respiratory abnormalities. Since garlic is known to possess an anti-oxidative stress effect, the present study was performed to evaluate the effect of garlic intake on fine dust-mediated pulmonary toxicity. Methods: Rats were intratracheally instilled with fine dust at 15 mg/kg body weight (BW)/day for five days following five-day intragastric intubation of garlic at 0.7 or 1.4 g/kgBW/day, or 13.1 mg/kgBW/day S-allyl-cysteine (SAC) as a reference component in garlic. Blood and bronchoalveolar lavage fluid (BALF) were collected. Results: Deposit of fine dust was visually and histopathologically observed in the lungs. Body weight gain during the instillation period was significantly lowered in all the groups instilled with fine dust. Neutrophil numbers in blood were significantly elevated in the fine dust alone group, but this alteration was diminished in the groups administered with garlic. Levels of serum glutathione were lower in the rats instilled with fine dust alone, and this decrease in the glutathione level seems dose-dependently compensated among the groups administered with garlic. Similar findings were observed in the BALF with statistical significance. Typical pulmonary histopathological observation related with inflammation was demonstrated in the lungs of the rats exposed to fine dust alone, whereas such histopathologic findings were not improved in the groups administered with garlic. Conclusion: The present study suggests that garlic intake could alleviate fine dust-mediated pulmonary or systemic toxicities. Further investigation is necessary to delineate the mechanism of garlic-mediated effects on pulmonary function.
스마트무인기 연료계통 제트펌프의 내부 유동 특성에 관한 실험적 연구
이윤권(Yoonkwon Lee),이지근(Jeekeun Lee),이창호(Changho Lee),최희주(Heejoo Choi) 대한기계학회 2008 大韓機械學會論文集B Vol.32 No.2
The jet pumps are widely used to transfer the fuel between the tanks in an aircraft fuel supply system. However detailed design procedures for determining the size of components of the jet pumps are not known so well. In this paper, the flow characteristics of the jet pump, which is applied in the fuel transfer system for the smart UAV (Unmanned Aerial Vehicle), were experimentally investigated using the acrylic jet pump model for the visualization of the internal flow. The pressure distributions within the jet pump were measured, and then the loss coefficients of each part were calculated. The effects of Reynolds number and the distances (S) between the exit of the primary nozzle and the mixing chamber entrance were investigated. In addition, cavitation phenomena were considered through the flow visualization inside the jet pump. As a conclusion from the experiment, the contraction shape of the primary nozzle has a strong effect on the loss coefficient of the nozzle and the cavitation occurrence. Cavitation starts around the nozzle exit, and then it propagates to the full flow fields of the jet pump.
스마트무인기 연료시스템 연료이송 제트펌프의 성능평가에 관한 실험적 연구
이윤권(Yoonkwon Lee),김의수(Euisoo Kim),박설혜(Sulhye Park),이지근(Jeekeun Lee),이창호(Changho Lee),이수철(Soochul Lee),최희주(Heejoo Choi) 한국항공우주학회 2007 韓國航空宇宙學會誌 Vol.35 No.12
스마트무인기 연료공급시스템에 사용되는 제트펌프의 연료탱크 사이의 연료이송 특성이 실험적으로 조사되었다. 제트펌프의 작동조건은 비행체의 임무에 따른 엔진의 요구사항을 만족하도록 설정되었으며, 주어진 조건에서 제트펌프의 성능을 평가하였다. 제트펌프의 유량비 변화에 따른 압력비 및 효율이 측정되었으며 면적비 변화 등이 고려되었다. 평가 결과로부터 제트펌프는 주어진 압력비보다 큰 범위에서 작동목표인 유량비 2.23을 만족하였다. 효율보다 연료공급량이 중시되는 연료이송 제트펌프의 경우 면적비 변화를 통하여 허용 압력비 범위 내에서 유량비 조절이 가능함을 알 수 있었다. The fuel transfer characteristics of the jet pump between fuel tanks, which is applied in the smart UAV fuel supply system, were experimentally investigated. The operating conditions of the jet pump were setup to meet the engine requirement according to mission profile, and the jet pump performance was evaluated at those conditions. The pressure ratio and the efficiency of the jet pump were measured with the variation of flow ratio. In addition, the area ratio was taken into the consideration to examine the effect on the jet pump performance. From the evaluation results, the jet pump met the fundamental requirement to transfer fuel with the flow ratio of 2.23. In the case of the jet pump that is focused on the fuel transfer quantity rather than its efficiency, the flow ratio would be adjusted through the variation of area ratio of the jet pump within the permitted limit of pressure ratio.