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민원규,W. K. Min 대한화학회 1963 대한화학회지 Vol.7 No.4
Six corrosion inhibitors for cooling water use were evaluated by means of a corrosometer in a laboratory bench scale test. A steel probe (Alloy 1020) was exposed and checked for the extent of corrosion in a recirculating water system, changing inhibitors and their concentrations at $40^{\circ}C$. A 95% inhibition was provided at the following concentrations of inhibitors. 50 ppm sodium hexametaphosphate 50 ppm commercial inhibitor A 50 ppm commercial inhibitor B 100 ppm disodium phosphate 200 ppm sodium chromate Sodium silicate was found to be use-less in this test. It was also observed that some inhibitors worked less effectively on the acid-cleaned steel probe.
민원규 대한금속재료학회(대한금속학회) 1968 대한금속·재료학회지 Vol.6 No.2
현장장치(보일러, 반응탑, 열교환기, 탱크, 관, 펌프 등)의 화학세척을 위한 예비조사로서는 세척대상의 검사와 침전물에 대한 용해시험을 실시하여 세제와 세척방법 등을 걱정한다. 셋째는 유탁세제, 알칼리 세제, 산세제 등으로 분류되는데 종래에는 유탁액이나 알칼리세제로서 침전물을 전처리한 다음 산세제로서 용해 제거하는 2단 세척이 사용되어 왔으나 차츰 단일단계 세척으로 전환되어 가고 있다. oil-acid emulsion이나 alkaline EDTA 세제는 대표적인 단일단계 세제이다. 산세제는 장치의 부식을 초래하므로 특성과 사용법에 관하여 상세한 설명을 한다. 현장 세척작업 요령은 Fill and soak cleaning, In-place circulating, spray cleaning, On-stream cleaning 등인데 이들에 관하여 각각 실례를 인용하여 설명한다.
金耕知,閔元奎 慶熙大學校 體育科學大學 1991 體育科學論叢 Vol.- No.4
Human activity make human life fine and make feeling cultivated by view point of education. In this respect Taekwondo the Korean art of empty-handed self-defense influences men's mental and physical development. Nowadays because Taekwondo becomes one of world-wide sports that disregards doctrine and ideology and it is famous as a disinterested cultural mission, we the suzerain state of Taekwondo take pride in it. By the view point of sociology of Physical Education, the role of Taekwondo is its social character and function with respect to physical education. As a traditional intangible cultral properties, Taekwondo is a excellent feats of arms that show Culture, Group, Instruction, Institution, Socialsystem, Social change. The role of Taekwondo has ethical social character Taekwondo hall is called moral social environment, and as it support social order, and take part in social maintenance as its moral and ethical value is high. 2nd: Taekwondo give a man of inhuanity who is denunciatory, escapist, anti-social, the opportunities of mutual cooperation an moral influence and so Taekwondo with help man to develop his personality. 3rd: Through gradual and planed trainning young boys and girls, who are in the most important times developmentally and physically. 4th: Taekwondo is a man-to-man finght skill it is possible that accidents happen. In the course of Taekwondo trainning, not simply can these accidents be forecasted, analyzed and prepared the safely of one and the other can be considered by the view point of self-defence. 5th: By the help of instructor of master, mutual respect of learner, self-control and the role of etiquette in tranning, a man will made a all-round character, the community will be sound and active. In a word, Taekwondo play an important role in society.
제트공조 시스템 적용에 따른 학교 대공간 실내 공기질 변화 분석
민원규(Won Gyu Min),이여경(Yeo Kyung Lee),김영일(Young Il Kim) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
As the risk of fine dust in Korea increases, physical education classes are held in large indoor spaces more frequently. Indoor air quality of the large space is important because children are vulnerable to fine dust. In this study, air jet systems with air purifying function applied to large space of school were analyzed with respect to PM2.5 and CO₂ concentrations. The PM2.5 concentration reduction effect was noticeable with the jet air conditioning system operation. However, concentration change of CO₂ was minimal.