• Transactions of the Korean Society of Automotive Engineers
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• v.5 no.1
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• pp.27-37
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• 1997

Internal combustion engine is the main source of environmental pollutants and therefore better technology is required to reduce harmful elements from the exhaust gases all over the world. Especially, harmful elements from the exhaust gases are caused by incomplete combustion of mixture inside the engine cylinder and this abnormal combustion like misfire or partial burning is the direct cause of the air pollution and engine performance degradation. the object of this research is to detect abnormal combustion like misfire and to keep the engine performance in the optimal operating state. Development of a new system therefore could be applied to a real car. To realize this, the spark-plug in a conventional ignition system is used as a misfire detection sensor and breakdown voltage is analyzed. In this research, bias voltage(about 3kV) was applied to the electrodes of spark-plug and breakdown voltage signal is obtained. This breakdown voltage signal is analyzed and found that a combustion phenomena in engine cylinder has close relationship with harmonic coefficient K which was introduced in this research. Newly developed combustion diagnostic method( breakdown voltage signal analysis) from this research can be used for the combustion diagnostic and combustion control system in an real car.

• Korean journal of food and cookery science
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• v.17 no.5
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• pp.497-502
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• 2001

능이버섯 〔Sarcodon aspratus(Berk.) S.Ito〕으로부터 단백질 가수분해 효소를 추출하여 75%(NH$_4$)$_2$SO$_4$ 염석과 DE52 anion exchange column chromatography 와 sepharyl-S 200 column 및 Mono s column chromatography 에 의해 정제하였는데 조 효소의 특이 활성은 55.2U/mg protein으로 조효소액에 비하여 11.26배 증가하였고 수율은 49.5%로 나타났다. 정제된 효소는 전기영동을 행한 결과 단일 band를 나타내었으며 분자량은 29,300으로 추정되었다. pH의 안정성은 4$^{\circ}C$에서 48시간 보존하였을 때 pH 8.5에서 가장 안정하였고, pH 5.5~10.5까지 높은 활성을 유지하였다. 온도에 대한 안정성은 30분간 보존 한 후 활성을 검토한 결과 단백분해능은 5$0^{\circ}C$까지 비교적 처음활성을 유지하다가 6$0^{\circ}C$에서는 53%정도의 활성이 유지되었으나 그 이상의 온도에서는 급격히 실화하여 7$0^{\circ}C$에서는 완전히 실화하였다. 금속 이온에 의해서는 크게 저해를 받지 않았으나 PMSF 저해제에 대하여 저해되어 본 효소가 serine protease임을 시사하였다.

• 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.

• 보건세계
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• v.55 no.6
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• pp.10-11
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• 2008

한국 최초의 우주인, 그리고 한국의 우주과학 기술을 주제로 한 올해의 씰이 드디어 세상에 나왔다. 도안 소재 선정, 도안가 섭외, 그리고 그림이 완성되어 인쇄가 되기까지 어느 하나 쉬운 것은 없지만, 특히 한국의 우주과학이라는 추상적인 개념을 씰 한 장에 담아야했던 올해의 씰은 도안과정에서 어려움이 많았다. 도안을 맡은 이복식 선생은 국내 유수의 광고 일러스트를 그렸으며 우표원화를 그리기도 했던 작가로, 마치 사진을 보는 듯 섬세한 필치로 하나하나 완성해나간 그림이 특징이다. 때문에 사람들은 그의 그림을 극사실화로 분류하기도 한다.

• Electrical & Electronic Materials
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• v.2 no.2
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• pp.103-108
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• 1989

새로운 전도성물질 중간체 합성기술의 기초연구의 일환으로 N, N-dialkylbenzamide를 ether 용액에서 lithiation 및 carboxylation시킨 결과, 저온 (-78.deg.~-20.deg.), 짧은 반응 시간에서는 방향족 고리 Ortho-위치에 carboxylation이 일어났고 상대적 고온 (0.deg.이상)에서는 아미드의 카보닐에 치환된 ketone이 얻어졌다. 이는 온도 조건에 따라 두 반응이 상호 경쟁적으로 진행되기 때문이라고 사료된다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2001.06a
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• pp.123-126
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• 2001

우리나라는 전 국토의 65%가 산지이며, 이중 97%가 입목지이다. 불에 잘 타는 침엽수 임상(林相)이 45%로 가장 많고, 잡목이 우거져 있으며, 가연성 낙엽이 많이 쌓여있기 때문에 일단 산불이 나면 수평적으로나 수직적으로 빠르게 확산된다. 산불은 대부분 인위적인 실화로 최근 5년 간 입산 자실화, 논ㆍ밭두렁소각에 의한 산불발생이 연평균 63%로 가장 많은 비중을 차지하고 있다.(중략)

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.945-947
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• 1997

Transmission capacity is becoming higher according to the increase of power demand. But construction of T/L is very difficult due to the securing of ROW and environmental problems. Then in order to consider efficient utilization of T/L, this paper suggests basic design methods of low-loss conductors.

• KOREAN POULTRY JOURNAL
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• v.41 no.11
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• pp.123-133
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• 2009

월간양계가 양계업 태동기인 지난 1969년 11월 창간된 이래 통권 481호를 발행하면서 40년간 양계인들의 눈과 귀가 되어 많은 정보들을 양계인들에게 제공하였다. 따라서 본고는 월간양계 창간 40년을 맞이하여 월간양계를 통해 실렸던 수 많은 내용들 중 기억될만한 에피소드나 실화를 묶어 '월간양계 40년사, 이런일 저런일 40선'을 엄선하여 선별, 게재하였다. 본 기사에 실린 내용 이외에도 IMF 위기, 계열업체 부도사태, 천재지변, 품질문제, 자조금 출범 등 양계산업에 기억될만한 사건들이 많이 있으나 지면관계상 부득이 40개만을 선정하게 되었다.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.101-103
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• 1998

New transmission lines are gradually constructed with high voltage and power for increase of electric power demands. And electric losses that are produced in line are increased. we made the algorithm for low loss wire and developed the computer program that makes loss of electric wire to be decreased for efficient power transmission. Electric wire is designed not to be decreased electrical and mechanical properties than that of existing electric wire.

• Fire Science and Engineering
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• v.27 no.6
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• pp.38-43
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• 2013

As a preliminary study to evaluate the reliability of the calculation method of fire load for residential furniture combustibles, the present study estimates the fire load considering the volume data obtained by the 3D geometrical information of combustibles and material properties based on the literature survey and sample burning test. A kitchen sink cabinet, couch and workstation were investigated for estimating its fire load and real fire test have been performed to measure total energy released from the combustibles. Based on total energy measured from real fire test, the relative error of the estimated fire load due to literature survey and measured material properties showed 6~120% and less than 20%, respectively. It shows that the estimation error of fire load are greatly affected by its material properties as well as geometrical information of combustibles and the present study will be able to contribute to accurate estimation of fire load.