• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2002.11a
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• pp.233-241
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• 2002

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2001.11a
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• pp.311-319
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• 2001

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2002.05a
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• pp.154-162
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• 2002

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2005.11a
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• pp.272-280
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• 2005

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.04a
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• pp.139-143
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• 2008

• Korean Chemical Engineering Research
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• v.53 no.1
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• pp.16-21
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• 2015

The body structure of diaphragm type preaction valve was improved in order to reduce the pressure drop. The pressure drop must be kept within 20.7 kPa to pass the revised (2012. 2. 9) standard for alarm valve and preaction valve. The pressure drop test was carried out by KFI (Korea Fire Institute) standard. The pressure drop of a preaction valve was higher than that of an alarm valve. Causes for increasing the pressure drop were investigated with the fluid flow in the valve. The preaction valve had more pressure drop factors (changes in velocity and direction) compared with the alarm valve. Inner structure of the preaction valve was changed to the clapper type to remove the pressure drop factors. In 80A and 100A size of preaction valves, the pressure drop was reduced from 80.9 and 171.0 kPa to 14.4 and 14.2 kPa respectively, after the change of the structure.

• Journal of the Daesoon Academy of Sciences
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• v.16
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• pp.1-23
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• 2003

The Jeungsan(1871-1909)'s revelation is the important meaning. Jeungsan hands down the two revelation for solution of Chosun postscript problem and presentation of Utopia. One time Suwun(1824~1864) is handed down and afterwords Jeongsan(1895-1958) after Jeungsan's Hwachon at 1917. Two revelations accomplish the day of the Jeungsan in public but the character is the countenance. The Jeungsan's revelation to Suwun solves present generation problems, the Jeungsan revelation to Jeongsan is continuously to do the day of the Jeungsan even after Hwachon. The Jeungsan stepped on the failure of the Donghak and on the upper lifestyle with the Cham-Donghag it opened the different side. The Cham-Donghag is concerned about the future Chosun to be the first-class country and Chosun Haewon is related with Danju Haewon. Danju Haewon is to be a fifty years religous study of Jeongsan. The Jeungsan's Gangse is to accomplish the Sungsajaein and it actualizes the appearance of Dotonggunja. Jeongsan is trying to do the religious activity about Sungsajaein and Dotonggunja as the Daedumok. The Jeungsan starts from revelation to the Suwun, to accomplish thought of the Cham-Donghag after Hwachon. The Jeungsan continuously has handed revelation led from religion activity, let Jeongsan do fifty years religious study. In the long run, it completes the fact that it accomplishes the outer space and the Chosun society of new setup, and a sacred religious work has been arranged the advocate of the Cham-Donghag through the Jeongsan by Woodang(1917-1996)'s Daesoonjinrihoe(1969).

• Journal of the Daesoon Academy of Sciences
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• v.17
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• pp.49-71
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• 2004

Daesoon-thought is considered as the one that offers the new interpretation of the people who live in the modern society and advocates the new worldview based on the history of Korean thought. Basically, Dong-Hak, which was a root of Korean religions, was strongly against formalistic Confucianism that governed the whole society of Chosun dynasty, and showed its characteristics towards anti-neo confucianism. However, the people, who severely suffered from the gap between the ideal and real world with deploring their languishment, longed for the emergence of a new leader, since the sprit of Dong-Hak, which was pervaded up to Gab-o-keong-zang, was collapsed before the sword of Japanese forces. Jeungsan was well aware of people's thoughts, and provided with them hopes of life in a very active manner. So, his thought showed plebeianism and democratic nature in a certain sense with racialism that tried to recover the collapsed pride of Chosun. Particularly, Cheon-ji-gong-sa, one of his religious thoughts, is clearly distinguished from those advocated by other religious thinkers, and shows the positive will that overcomes the difficulties of the world in the religious way. This paper aims at shedding the light on how Daesoon-thought appeared with the background of late Chosun. For this, the trend appearing in religions and thoughts at the time of late Chosun when Daesoon-thought started, will be examined carefully. Also, based on such a background it will be further investigated how Daesoon-thought has been developed and systemized.

• Journal of the Daesoon Academy of Sciences
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• v.29
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• pp.1-36
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• 2017

The purpose of this article is to investigate the future prospects for establishing the True Donghak phase of Daesoon Thought. The True Donghak refers to 'the future prospect of having a true life, true thinking, and true living' in which enjoying the world in a state of good fortune became a true reality after the death of Suwun, according to faith in Gucheon Sangje. The correlation between "Attending to the Lord of Heaven" in Donghak, and "The Reordering Works of Heaven and Earth" in Daesoon shows the prospect of achieving the Daesoonist transformation into energy to gain true life and re-creation. The correlation between "Nourishing the Lord of Heaven" in Donghak and "Attending to Study and Attending to Law" in Daesoon show the transformation of Daesoon-reason into true thinking and renewing. The correlation between "Humanity is Divine" in Donghak and "The Salvation of Humanity is the Will of Heaven" in Daesoon show transformation into the practice of Daesoon for the true living and renewing. This investigation utilizes the literature review and the generation theory of life-philosophy to examine revelations regarding the conversation between Spirit and Mind. This is the future prospect for the establishing the True Donghak phase of Daesoon thought. It consists of a threefold connection among life, thinking, and living. The "public-centered spirituality of Daesoon Truth" which connects and mediates among people appears in three aspects. Firstly, it is thought to be the vision of the true life through the 'renewal of active, energetic power' bestowed by Gucheon Sangje. Secondly, it is thought to be the vision of true thinking through the "renewal via freedom from delusion". Thirdly, it is thought to be the vision of true living through the "renewal of true mind". To bring about the creation of true Donghak, Gucheon Sangje incarnated to the Korean peninsula instead of Suwun and the salvation of the world salvation now centers on Korea with regards to the threefold connection future prospect. Gucheon Sangje's revelation addresses and solves the postscript problem of Chosun and further establishes a Utopia. Suwun established Donghak but failed later on due to his lankiness. At last the true Donghak has been opened for the future by Gucheon Sangje and Jeongsan's fifty years of religious accomplishments. In the long run, it has been developed further by Woodang's Daesoon Jinrihoe.