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A study on the Optimal Combat Exchange Components Selection Method
전동주,이수중,이승률,임재훈 한국산업경영시스템학회 2017 한국산업경영시스템학회 학술대회 Vol.2017 No.추계초록
The navy that operates a large size of weapon systems, relatively a small quantity of, in order to minimize the loss of war potential caused by the breakdown of weapon system during long-term naval area of operation assigns allowance parts such as Maintenance Float (M/F), Combat Exchange Components, Concurrent Spare Parts (CSP) and so on to each unit and makes them use the allowance parts. Among them, Combat Exchange Components is being calculated in accordance with heuristic method because there is no standardized method to calculate it differently from Maintenance Float and Concurrent Spare Parts. In this article, more systematic calculation optimization method of it is suggested by selecting the optimum Combat Exchange Components in accordance with integer programming and presenting it, comparing it with the list of Combat Exchange Components calculated by actual heuristic method.
전동주 ( Dong Joo Jeun ),차윤엽 ( Yun Yeop Cha ),이은 ( Eun Lee ) 한방재활의학과학회 2011 한방재활의학과학회지 Vol.21 No.1
Objectives: The present study investigated inflammatory effect of Rheum undulatum L. in lipopolysaccharide-exposed rats and Raw 264.7 cells. Methods: Male rats weighting 185.39±8.21 g fed basal diet for 1 week and 32 rats were divided into a control group and 3 experimental groups. We fed a control group of rats a basal diet and administered normal saline(100 mg/kg, 1time/1day) for 6 weeks. And we fed basal diet and administered an extract of Rheum undulatum L.(100 mg/kg, 200 mg/kg, 300 mg/kg, 1time/1day) to each experimental group of rats. We measured the plasma concentration of IL-1β(interleukin-1β), IL-6 and TNF-α(tumor necrosis factor-α), liver cytokines, Raw 264.7 macrophages cytokines. Results: The plasma concentration of IL-1β, IL-6 and TNF-α peaked at 5h(hour) after LPS(lipopolysaccharides) injection, and the values of the Rheum undulatum L. extract groups were lower than those of the control group. In the increment of these cytokines concentration at 2h and 5h after LPS injection, the Rheum undulatum L. groups were lower than that of control group. The plasma concentration of IL-10 peaked at 5h after LPS injection, and the values of the Rheum undulatum L. extract groups were higher than those of the control group. In the increment of this cytokine concentration at 2h and 5h after LPS injection, the Rheum undulatum L. groups were higher than that of control group. Liver cytokines measurement was done at 5h after LPS injection. The concentration of liver IL-1β and IL-6 in the Rheum undulatum L. groups was lower than that of the control group. The concentrations of liver TNF-α, and IL-10 showed no significant differences among all the treatment groups. In the studies of lipopolysaccharide-exposed Raw 264.7 cells, the concentration of IL-1β, IL-6 and TNF-α in the lipopolysaccharide-exposed cells groups was higher than that of control group(normal group), and in the lipopolysaccharide-exposed cells groups, these values showed a tendency to decrease in the Rheum undulatum L. groups. The concentration of IL-10 in the lipopolysaccharide-exposed cells groups was higher than that of control group(normal group), and in the lipopolysaccharide-exposed cells groups, the values showed a tendency to increase in the Rheum undulatum L. groups. Conclusions: These results indicate that the Rheum undulatum L. extracts have an functional material for inflammatory activities.
Performance Model을 이용한 무기체계 운용화면 GUI 사용성 평가 및 개선에 대한 연구
전동주(Dong-Ju Jeon),이승률(Seung-Ryool Lee),최영원(Young-Won Choi),이혜원(Hye-Won Lee),김두정(Doo-Jung Kim) 한국산업경영시스템학회 2016 한국산업경영시스템학회지 Vol.39 No.3
The recent development of modern weapon system by SOS (System of System) has required users to have more exact decision making. It is possible to achieve the control of complex weapon system more efficiently and effectively by increasing usability. Accordingly, many studies on graphical display have been conducted for several years in the field of HCI (Human Computer Interaction) and GUI (Graphic User Interface), starting from its design stage. Therefore, this paper focuses on evaluating the system GUI usability and analyzing several important points based on performance model, which is a tool for the evaluation and the improvement of service quality. Performance Model, the main focus of this study, reflects user expectations (which is defined as user importance in this paper). The study consists of four steps. First, 34 checklists are drawn from the existing studies related to GUI usability evaluation by using a heuristic method, and then the checklists are matched with 11 weapon system design factors. Next, the study evaluates the importance of GUI element and the usability of weapon system “A” with the checklists twice respectively. Third, the performance of user importance ( ?? ) and the performance of usability ( ?? ) are calculated by modifying a numerical formula for normalization in this step. Finally, the study compares the approach it takes and the existing usability evaluation method, demonstrating that there is a significant difference between the two methods as a result. In addition, 4 improvement factors are suggested for weapon system “A” as “Shortcut” and “Description of Abbreviation,” and so on. Although it is necessary to conduct more studies for higher reliability and validity of the results, this study is meaningful considering it takes a new point of view.