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화장품(化粧品)에서 무기분말(无機粉末)에 의한 방부제(防腐剤)의 효능저하(效能低下)
정광수 ( Kwang Soo Jung ) 대한화장품학회 1985 대한화장품학회지 Vol.11 No.1
Polyoxyethylene계 유화제를 이용한 유화계에 있어서 talc 및 TiO<sub>2</sub>에 의한 methyl p-hydroxy benzoate의 흡착과 그에 따른 방부력 감소를 여러 가지 분석방법과 미생물 실험을 통하여 측정하였다. 이 유화계에 있어서 methyl p-hydroxy benzoate는 talc 및 TiO<sub>2</sub>에 흡착되어 방부력이 감소함을 알 수 있으며 방부력 저하에 미치는 영향은 TiO<sub>2</sub>보다 talc가 더 크고, talc에 의한 methyl p-hydroxy benzoate의 흡착량은 20℃에서 다음과 같은 식으로 나타낼 수 있었다. 즉 a=11.511C<sup>0.747</sup> The decreased preservative effect by tale and TiO<sub>2</sub> for emulsions obtained with polyoxyethylene surfactant was studied by various analytical methods and biological test. The preservative effect of methyl p-hydroxybenzoate was decreased by the addition of talc and TiO<sub>2</sub> and this result was attributed to the adsorption of methyl p-hydroxybenzoate on them. Talc exhibited more decreased preservative effect than that of TiO<sub>2</sub>. The amount of the adsorption of methyl p-phydroxybenzoate by talc at 20℃ could be represented by the following equation; a=11.511C<sup>0.747</sup>
‘거북선과 학익진 대형의 진법도’에 담겨있는 승첩과 리더십의 비결
정광수(Jung Kwang Soo) 순천향대학교 이순신연구소 2005 이순신연구논총 Vol.- No.5
우리는 ‘거북선에 대한 자료는 태무하다’고 하면서 각양각색의 거북선을 만들어 왔는데, 실은 直衝, 又衝, 而今등을 오역했기에 있는 자료를 두고도 자료가 태무하다고 잘못 알아온 것이다. 반면 이들 오역을 바로 잡으면, 23전 23승의 해전도가 선명하게 그려지고, 20세기 세계 해군들의 학익진 연구와 승계사도 설득력 있게 정립된다. 충무공은 어려운 전란 중에도 군영경영과 후방고을 경영에 성공한바, 이 역시 승첩과 리더십 비결의 원천이 된 거 같다. When looking at Janggye of Chungmugong, there is a phrase ‘besieging from the east and the west, and it means Hakikjinbeop in the Okpo Sea Battle. In the Sachunpo Sea Battle, the Geobukseon was added to Hakikjin of the Okpo Sea Battle. In the Dangpo Sea Battle, the Geobukseon approached the Japanese ship and collided with the ship as the water depth of Dangpo was deep, and Yongmeoripo (dragon head-shaped cannon) attached a Japanese general of Chungryu (Hamgyo). In the Danghangpo Sea Batter, there appeared Ssanghakikjin. By the way, although there are data mistranslating ‘直衝(Jikchung), 又衝(Uchung), 而今(Yigeum)’ in Janggye of Chungmugong, we have been misled that there has been no data. Upon the right interpretation on Janggye of Chungmugong, the ‘principle of Guhbooksun+Hakikjin’ is deciphered from the Okpo Sea Battle to the Danghangpo Sea Battle, and then, the sea battle pictures are also deciphered applying the ‘principle of Geobukseon +Hakikjin’ to the battles from the Hansando Sea Battle to the Noryang Sea Battle. From thereon, the successive history of the principle of Yi Sun Shin’s sea battles is deciphered for the 20th century navy worldwide. If we correct the mistranslation in Janggye of Chungmugong, we can clearly picture the sea battle recording 23 victories among 23 battles. That tells us the secret of leadership that made Yi Sun Sin invincible.
냉장고 가스켓 형상 변화에 따른 냉장고 열손실 저감 효과
하지수(Ji Soo Ha),정광수(Kwang Soo Jung),김태권(Tae Kwon Kim),김경호(Kyung Ho Kim),김석로(Seok Ro Kim) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.5
The amount of heat loss of a refrigerator through the gasket is nearly 30% of total refrigerator heat loss. In this paper, quantitative evaluation analysis of heat loss through gasket is established with numerical heat transfer analysis. Extending the gasket shape to protect the heat loss from the gasket, power consumption is measured by using real refrigerator in a temperature and humidity chamber and suggest the gasket shape to reduce the heat loss. From the present result of the numerical simulation of heat transfer and experiment with varying gasket shape, we are able to reduce the heat loss about 20~40% by using extended gasket and the power consumption can be reduced about 5%.
냉장고 가스켓 주위 형상 및 물성치 변화에 의한 열손실 영향 연구
하지수(Ji Soo Ha),정광수(Kwang Soo Jung),김태권(Tae Kwon Kim),심재성(Jae Sung Shim) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.6
The amount of heat loss of a refrigerator through the gasket is nearly 30% of total refrigerator heat loss. In this paper, quantitative evaluation for the effects of various effort to reduce heat losses through the gasket. The first trial is to extend the inner gasket to prevent the heat loss flowing from the inner of refrigerator. The effects of thermal conductivity changes of gasket and magnet are investigated by the numerical heat transfer analysis. The position change of hot line is also examined in the present research. From the present result of the numerical simulation of heat transfer, we are able to reduce the heat loss about 20~40% by using inner gasket extension. The reducing of thermal conductivity of gasket is considerable in the heat loss reduction. On the other hand, the thermal conductivity change of magnet has no apparent effect in heat loss reduction. The position change of hot line has considerable positive effect in the reduction of heat loss near gasket region.
냉장고 가스켓 형상 변화에 따른 냉장고 열손실 저감 효과
하지수(Ji Soo Ha),정광수(Kwang Soo Jung),김태권(Tae Kwon Kim),김경호(Kyung Ho Kim),정관식(Gwan Sik Jeong),김석로(Seok Ro Kim) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
Insulation of refrigerator with gasket material near door becomes the technical point at the aspect of heat loss and energy efficiency. Heat loss of refrigerator through the gasket is nearly 30%. In this paper, quantitative evaluation method of heat loss through gasket in established suggest the method for the improvement of heat loss. To analyze the heat transfer, we have used the common software Fluent that is used to CFD. Because of using the convection coefficient of heat transfer, we have solved only the equation of energy for heat transfer. As a result, we have known that heat loss flows through the heat flux vector and that the heat gathered out of the outside iron plate is transferred inner part through the gasket and ABS, etc. Through the result of the numerical simulation that use sub-gasket, we have known that we are able to reduce the heat loss about 20~40%. when we applied that sub-gasket on a real refrigerator, the power consumption had reduced about 4.76%. In addition, when we applied a more improved sub-gasket on a real refrigerator and measured the power of the refrigerator the power consumption does reduce about 3% and we will try to apply the improved sub-gasket on a new models of refrigerator.