Vortex 하이브리드 로켓의 스월러와 pre-chamber 변화에 따른 연료 후퇴율에 관한 연구

김수종,김진곤 한국항공대학교 항공우주산업기술연구소 2003 航空宇宙産業技術硏究所 硏究誌 Vol.13 No.-

In this paper, an experimental study on the dependence of solid fuel regression rate of vortex hybrid rocket engine on the variation of swirler and pre-chamber was performed. Vortex hybrid rocket engine was designed and 10 types of swirler and 3 types of pre-chamber were used for this study. Experiments were consisted of three different cases. In the first case, the total inlet port area was held identical. Only the number of port was varied at 3, 4 and 5. In the second case, the inlet port diameter was held identical, so that the total inlet area was increased by 1/3 with each additional port. For the variation of pre-chamber, three different types were applied for this study, straight shape, 20 mm converging shape and 30 mm converging shape, respectively.

허브공항 경쟁우위 확보를 위한 핵심역량 연구 : 전략적 네트워크를 중심으로

김수곤,허희영,이윤철 한국항공대학교 경영연구소 2000 경영연구 Vol.7 No.2

아시아지역에서 건설되었거나 확장될 대부분의 공항은 허브공항이 되기 위하여 심한 경쟁을 할 것이다. 이 목적을 달성하기 위하여 공항당국은 핵심역량을 파악할 필요가 있다. 유럽의 공항들을 그들의 허브공항으로서의 성과지표인 전체승객수와 환승율에 따라 4개 그룹(순수 허브형, 자체수요 의존형, 연계수요 의존형, 순수 스포크형)으로 구분하였다. 자원기반접근방법(Resource-based Approach)을 이용하여 허브화에 성공한 타입의 전략적 핵심역량을 규명하였다. 특히 공항당국의 협력적 네트워크 구축이 결정적 역량으로 제시되었다. 이 연구에서 파악된 핵심역량(항공사, 컨세션업체 등과의 협력적 네트워크의 구축, 환승시설의 편의성, 쇼핑·여가시설의 다양성 등)은 허브공항화를 추구하는 공항당국에게 많은 도움을 줄 것이다. Most airports having been built or expanded in Asia will face fierce competition to become hub airports. To accomplish this goal, airport authorities will need to identify core capabilities. Some airports in Europe were categorized into 4 different typedpure hub type, self-demand dependent type, transfer-demand dependent type, pure spoke type) depending on their performance variables, the number of total passengers and the transfer passenger to total passenger ratio. Resource-based approach identified core strategic capabilities from successful hub type of airports. Especially, cooperative networks of airport authorities were suggested to be one of critical strategic capabilities. These core capabilities (cooperative networks with airlines, concessionaires, convenience of transfer facilities, and diversity of shopping and leisure facilities, etc) will help airport authorities become hub airports.

國民經濟倫理와 國民의 姿勢

金秀坤 漢陽大學校 行政問題硏究所 1982 行政問題論集 Vol.3 No.-

21世紀를 향한 人力資源管理戰略

金秀坤 경희대학교 기업경영연구소 1994 기업경영연구 Vol.1 No.-

近代英語의 性格

金手坤 全北大學校 1969 論文集 Vol.11 No.-

자기 성장 훈련이 자아 개념에 미치는 효과

金赫坤,李壽進 순천대학 학생생활연구소 1997 學生生活硏究 Vol.16 No.-

체형별 승용차 구매 평가기준의 차이 : 경영혁신의 체형별 성공요인 Sucess Factors with Body Types in Business Innovations

김임곤,김수동 한국정보전략학회 2001 한국정보전략학회지 Vol.4 No.1

It is supposed that if consumers' purchasing behaviors are different according to body types, these difference could be utilized for the sales policy of products. The purpose of this research is to analyze, with body types, whether there are any difference in a degree of values of the purchasing evaluation criteria, when they purchase automobiles. Weight and height of men from 25 year-old to 29 year-old are measured and then how to evaluate the 10 purchasing evaluation criteria of automobiles presented in questionaires are investigated. And body types are classified as lean, slightly lean, normal, slightly obese, and obese type with measured weight and height, The founding of this analysis is that there are significant difference in a degree of values of each purchasing evaluation criteria. This result shows that lean type and obese type are considerably different from the other body types, and also the types are different from each other in a degree of values of the criteria. Obese type highly evaluate factors related to comfort, lean type highly evaluate related to design and dignity, but slightly lean type and slightly obese type lowly evaluate factors related to comfort and design. Improved some problems and carried out more concrete researches, the result of the research could be better utilized for establishing automobile sales-production policies and strategies.

Bacteroides fragilis에 의한 심장막농양 1예

김석연,문수영,김경엽,권성진,김명곤,이미숙,이희주 대한감염학회 2007 감염과 화학요법 Vol.39 No.6

화농성 심장막염은 전 세계적으로 매우 드물고 사망률이 높은 질환이다. 화농성 심장막염은 대부분 심장막을 침범하지만, 국소적으로 농양을 형성하는 경우도 보고 되고 있다. 세균에 의한 화농성 심장막염은 전체 급성 심장막염의 원인 중 6% 정도를 차지하고 있다. 그 중에서 혐기균에 의한 화농성 심장막염은 호기균에 의한 것보다 훨씬 드물다. 저자들은 만성 신질환으로 혈액 투석을 받고 있는 58세 남자에서 발생한 B. fragilis에 의한 화농성 심장막 농양과 심장눌림증을 국내에서 처음으로 경험하였기에 이를 고찰과 함께 보고하는 바이다. Purulent pericarditis is a rare, life-threatening condition and usually ivolves the whole pericardium. However only few cases have been reported in which a loculated pericardial abscess occurred from purulent pericarditis. The prevalence of acute pericarditis due to bacteria was 6%. Purulent pericarditis due to anaerobic bacteria has been reported less frequently than aerobic bacteria. There was no report about purulent pericarditis due to Bacteroides fragilis in Korea until now. So we report the first case of pericardial abscess due to B. fragilis in 59 year old Korean male with history of chronic renal failure and hemodialysis, that was complicated with pericardial tamponade.

과량의 Vitamin A가 Rat 태자에 미치는 영향

조순곤,김수일,곽명순,김원식 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.1

For the study on the effects of vitamin A on the rat fetuses, 500mg/kg of retinol palmitate was administered orally once at the day 8.5 of gestation. In this study, the Sprague-Dawley rats were used as an experimental animal, which was divided into control and retinol palmitate treated groups. The animals were sacrificed under ether anesthesia at the day 12.5, 13.5, 14.5, 15.5 and 16.5 of gestation, laparotomized and hysterectomized. After counting the pregnant sacs, opened the sacs and removed the fetuses under stereoscopic observations, - fetal status, congenital malformations and other external anomalies etc.. The weight of live fetuses was measured and analysed it statistically, and compared the growth curves between 2 groups. The results were as follows ; 1. The survival rate of fetuses in the retinol palmitate treated group was lower significantly than that of control group except the day 12.5 of gestation. The rate was lowered daily from the day 12.5 to the day 16.5 of gestation. 2. The mean body weight of fetuses was lowered in the retinol palmitate treated group significantly from the day 12.5 to the day 16.5 of gestation, daily. 3. The congenital anomalies induced by retinol palmitate in this experiment were anencephaly, exencephaly and severe underdevelopment. According to the above results, it is considered that the retinol palmitate induces intrauterine fetal death caused by major congenital anomalies such as exencephaly and anencephaly, and delay the fetal growth by inhibition of differentiation and proliferation during organogenesis. But the exact mechanism of action cannot be known. And it is necessary to study the effects of retinol palmitate on the growth of fetuses with its congenital anomalies should be done with changing the dose, method of administration and the duration of treatment.

CV黑鉛鑄鐵의 黑鉛型態 및 機械的 性質에 미치는 Ni첨가 효과에 관한 연구

許甫寧,金水泳,南泰運,徐弘三,金學權 慶尙大學校 1985 論文集 Vol.24 No.1

In this study, an easy production method of CV (Compacted/vermicular) graphite cast iron with small addition of a Ni which is known as the element of the graphitization was investigated. And so, the effects of fading (holding) time and of Ni addition after the treatments with spheroidizer (Fe-Si-Mg-Ca-Al-Ti-Ce) were also investigated. The results obtained are as follows. 1. According as Ni contents in CV molten cast iron increase, the graphite No. and CV radio were increased. And so, graphite form and the distribution of the graphite were homogenized. 2. When the addition treated with Ni, the tensile strength were increased, and the effect of fading time were decreased.