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Impatience 특성을 고려한 군 긴급정비시스템 정비인력 최적할당 연구
김성우,Kim, Sungwoo 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.4
Impatience characteristics are an important factor to be considered in the defense field, which is sensitive to time, but there are not many cases applied. In addition, due to the difficulty of analysis that must consider various probabilistic factors (breakdown/maintenance distribution, impatience characteristics, etc.), military decision makers consider only simple data (number of occurrences per year, maintenance time, etc.) Therefore, in this study, a model capable of analyzing the performance of the emergency maintenance system for determining the appropriate size and organization of military and civilian maintenance personnel was presented in consideration of impatience characteristics and probabilistic factors. And through numerical analysis, the appropriate size of the military and civilian emergency maintenance teams was analyzed. This study is significant in that it can improve readiness of operational power and prevent waste of defense budget through efficient operation of the military's emergency maintenance system.
창업·취업교육이 대학생의 창업·취업의도 영향요인에 미치는 효과
김성우,강민형,Kim, Sungwoo,Kang, Minhyung 한국공학교육학회 2016 공학교육연구 Vol.19 No.4
This paper explores antecedents of entrepreneurial and job search intentions based on the theory of planned behavior. Additionally, it examines the impact of entrepreneurship and job search education on these antecedents of entrepreneurial and job search intentions. The research model has been validated by analyzing 1,432 responses from undergraduate students in South Korea. The results of analysis provide several findings: First, entrepreneurship attitude, entrepreneurship subjective norm, and entrepreneurship self efficacy showed significant positive effects on entrepreneurial intention, but their effects on job search intention were insignificant. Second, while job search attitude showed significant positive effects on both intentions, job search subjective norm showed a significant effect only on job search intention, and job search self efficacy showed a significant effect only on entrepreneurial intention. Third, entrepreneurship education increased all the antecedents of entrepreneurial intention, and reduced job search attitude. These results imply that entrepreneurship and job search education should be managed comprehensively, considering their cross-effects on the antecedents of entrepreneurial and job search intentions.
김성우(Sungwoo Kim) 육군사관학교 화랑대연구소 2017 한국군사학논집 Vol.73 No.3
Being masters of each fields, both Sun Tzu and Lao Zi have been the subject of contemporary research in the fields of political science, business administration, and social science. The general viewpoints of the two thinkers are thought to be unrelated. However, if we take a closer look we can find that there are many commonalities. Thus, the purpose of this study is to discover the commonalities between their philosophies for an improved understanding of them and to examine their influence on each other. First, Lao Zi’s military thought is explored, and connections with that of Sun Tzu’s are then examined. Next, ideas similar to Lao Zi’s found in Sun Tzu’s writings are investigated. As a result, Sun Tzu’s concept of shì(勢) and Lao Zi’s nature(自然) are found to be analogous. Also, it is found that the concept of water(水) is important in the philosophies of both thinkers. In addition, it can be seen that their positions on war are similar in that their shared perspective is one of realistic pacifism, being fully aware of the harms and seriousness of war.
Down-Regulation of Aquaporin 4 in the Lithium-Treated Rat Brain
김성우(Sungwoo Kim),정용욱(Yong-Wook Jung) 대한해부학회 2007 Anatomy & Cell Biology Vol.40 No.4
리튬은 오래 전부터 양극성 정서장애를 치료하는 약제로 알려져 왔다. 그러나 최근에는 그 작용기전을 알 수 없으나 여러 실험을 통해서 리튬의 신경세포보호 작용이 알려지고 있다. 본 실험은 리튬의 전처치가 뇌부종을 일으키는 것으로 알려진 아쿠아포린4 단백질의 발현감소를 유도할 수 있는지를 알아보았다. 지속적인 리튬의 처치는 25일간 쥐 분말사료에 리튬을 40 mmol/dL 혹은 60 mmol/dL을 섞어 투여하였다. 혈장에서 리튬의 농도는 40+60 mmol/dL 투여군에서 0.60±0.1 mEq/L으로 임상적치료농도에 도달하였다. 리튬처리 후 뇌척수액과 뇌의 접촉면과 혈액-뇌장벽에서 농도에 따른 아쿠아포린4 발현의 감소가 관찰되었다. 따라서 리튬은 아쿠아포린4의 발현감소를 통하여 뇌부종을 치료 혹은 예방하는 약제로 사용가능하다는 것을 의미한다. Lithium has long been a primary drug used to treat bipolar mood disorder. Recently, in vivo and in vitro studies have demonstrated neuroprotective actions of lithium, even though therapeutic mechanisms of lithium remain obscure. The present study was undertaken to examine whether pretreatment with lithium can reduce the expression of aquaporin4 (AQP4) related to brain edema. Chronic lithium treatment was produced by pellet of standard diet containing 40 mmol/dL and/or 60 mmol/dL lithium chloride for 25 days. The serum concentrations of lithium were increased to 0.60±0.1 mEq/L in the 40 mM/dL and 60 mM/dL lithium treated rats which is therapeutic dose of clinical practice. After chronic lithium treatment, there was a dose-dependent down-regulation of AQP4 expression in the cerebrospinal fluid-brain interfaces and blood brain barrier. Down-regulation of AQP4 after chronic lithium treatment suggest that lithium may be used for the prevention or treatment of brain edema.
Characteristics of Emission and Fuel Economy of Fuel Additives in the Domestic Market
김성우(Kim, Sungwoo),이민호(Lee, Minho),인정민(Lee, Jeongmin),김재권(Kim, JaiGueon),정충섭(Jung, Choongsub) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
In the past, drivers bought a fuel additives to treat a combustion chambers or injector nozzles for carbon or gum deposit at market. But, nowadays, as raised cost of fuel for a vehicle the consumers also start focusing on a function of fuel additives that increases fuel economy of one. Some fuel additive manufacturers and agents advertise that their goods make a car it's initial state. This paper shows data for 3 years that were acquired during test for registration of an additive in domestic. The data were sorted according to kind of vehicle, kind of fuel, test mode, CO, HC, NOx, PM, total emission, fuel economy and accumulated mileage. And than by using simple linear regression analysis changes according to accumulated mileage was displayed. Normal distribution and histogram of rate of increase and decrease were displayed. the analyzed data indicated that a fuel additive maintain and make a car the first state of one but can't make a car be batter than initial the one.