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압축성 유체용 글로브 밸브의 유량특성 향상에 관한 연구
배지원,정우영,장지성 사단법인 유공압건설기계학회 2019 드라이브·컨트롤 Vol.16 No.4
Glove valves are used for various purposes in the process control field because such valves enable easy control of temperature and pressure. However, such valves are associated with significant loss of pressure and also have the disadvantage of complicating the shape of the cage or plug to facilitate linear flow rate change. In this paper, the shape of the plug, one of the valve flow control elements, was designed to improve the flow characteristics of the glove valve, and then CFD analysis was performed using compressible fluid. The numerical analysis results of the glove valve were analyzed according to the opening ratio and the pressure ratio of the valve. From these results, it was found that the proper notch on the side of the plug contributed to reducing the energy loss of the fluid through the valve and improving the linearity of the valve.
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배지원,문장원 한독심리운동학회 2023 심리운동연구 Vol.9 No.1
There are various emotional theories that explain what emotions are and how they work. Emotions are difficult because they can be analyzed from various perspectives. In a sense, emotions are sophisticated and subtle and typical of what makes us human. In a different sense, however, human emotions appear to be very similar to the reactions expressed by other animals. Emotions and how to express them also reflect our social environment, but it may have been shaped by natural selection over time. These conflicting features of emotions made it difficult to construct theories and led to the generation of various theories. The purpose of this study is to get closer to the reality of emotions and expand the scope of understanding of the experience of emotions by reviewing existing emotional theories. To this end, the researched emotional theories were reviewed to explore the origin and nature of emotions, and scientific explanations of emotional experiences and psychological frameworks for understanding emotional experiences were explored. The result of the tentatively derived study is that it is unlikely that a single theory will prevail anytime soon because not all emotional theories compete directly with each other. The vast amount of emotional-related empirical research done over the past half century has made the theorizing of emotions an interesting challenge, and the homework to be solved is to explain all available empirical evidence. 정서가 무엇이며 어떻게 작동하는지 설명하는 다양한 정서 이론이 있다. 정서는 다양한 관점에서 분석될 수 있기 때문에 어렵다. 어떤 의미에서, 정서는 정교하고 미묘하며 우리를 인간으로 만드는 것의 전형이다. 그러나 다른 의미에서, 인간의 정서는 다른 동물이 나타내는 반응과 매우 유사한 것으로 보인다. 또한 정서와 그것을 어떻게 표현하는지는 우리의 사회적 환경을 반영하지만, 시간이 지남에 따라 자연 선택에 의해 형성되었을 가능성도 있다. 정서의 이러한 상반되는 특징들은 이론을 구성하는 것을 어렵게 만들고 다양한 이론의 생성으로 이어졌다. 이 연구의 목적은 기존의 정서 이론들을 검토함으로써 정서의 실체에 대해 좀 더 가까이 접근해 보고 정서의 경험에 대한 이해의 폭을 넓히고자 함이다. 이를 위해 정서의 기원과 본질을 탐색하기 위해 연구된 정서 이론들을 검토하였고, 정서 경험에 대한 과학적 설명과 정서 경험을 이해하기 위한 심리적 틀에 대해 탐색하였다. 잠정적으로 도출된 연구의 결과는, 모든 정서 이론들은 서로 직접 경쟁하는 것은 아니기 때문에 단일 이론이 조만간 우세할 것 같지는 않다는 것이다. 지난 반세기 동안 이루어진 방대한 양의 정서 관련 경험적 연구는 정서에 대한 이론화를 흥미로운 도전으로 만들었고, 풀어야 할 숙제는 이용 가능한 모든 경험적 증거를 설명하는 것이다.
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배지원,정범진 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.4
We investigated the influence of the aspect ratio (H/R) of the oxide layer on the reactor vessel heating inthree-layer configuration. Based on the analogy between heat and mass transfers, we performed masstransfer experiments to achieve high Rayleigh numbers ranging from 6.70 1010 to 7.84 1012. Twodimensional(2-D) semi-circular apparatuses having the internal heat source were used whose surfacesof top, bottom and side simulate the interfaces of the oxide layer with the light metal layer, theheavy metal layer, and the reactor vessel, respectively. Multi-cell flow pattern was identified when the H/R was reduced to 0.47 or less, which promoted the downward heat transfer from the oxide layer andpossibly mitigated the focusing effect at the upper metallic layer. The top boundary condition greatlyaffected the natural convection of the oxide layer due to the presence of secondary flows underneath thecold light metal layer
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연구논문 : 유치원 친환경급식 실시에 따른 학부모의 인식도 및 유아의 식행동
배지원 ( Ji Won Bae ),오명숙 ( Myung Suk Oh ) 한국식생활문화학회 2012 韓國食生活文化學會誌 Vol.27 No.6
This study was conducted to investigate the differences in households, parental perception, and dietary behaviors of preschool children from kindergartens with environment-friendly food service (environment-friendly food service group; EFG) versus children from kindergartens with general food service (general food service group; GFG). We sought this basic information to examine the impact of environment-friendly agricultural products in preschool food services. Age, education level, and monthly family income of the EFG were significantly higher than the GFG. The frequency of purchasing environment-friendly agricultural products was significantly higher in the EFG than the GFG, with the most frequently purchased items in both groups being vegetables. The GFG had a significantly higher perception than the EFG in the superior quality of environment-friendly agricultural products; however, a greater proportion of the GFG than the EFG thought environment-friendly products were too expensive. The most frequent reason for purchasing environment-friendly agricultural products in both groups was safety. When purchasing environment-friendly agricultural products, the most important selection factor for the majority of both groups was the label certifying quality assurance. Both groups also considered price reduction as essential for promoting environment-friendly agricultural products. In regard to parental perceptions on food service in kindergarten, the EFG had a significantly higher satisfaction with the nutritional adequacy of the menu compared 10 the GFG. Both groups considered food safety and health as primary reasons for using environmentfriendly foods in the preschool food service, with a greater proportion of the EFG than the GFG responding this way. There were significant differences between the EFG and GFG, as the main satisfaction from using environment-friendly foods in the EFG was safety, freshness, and good hygiene, whereas the main satisfaction in the GFG was a good food service menu, freshness and good hygiene, Dietary behaviors of preschool children in the EFG were also significantly superior to the GFG. Thus, environment-friendly agricultural products have positive effects on the dietary behaviors of preschool children and should be increased in the preschool food service. Lowering prices and a strict supervision of quality assurance is also necessary to promote consumption of environment-friendly food materials.
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