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바이오가스의 효율적 활용을 위한 중공사 기체분리막 시스템 연구
권오훈,전용우 한국폐기물자원순환학회(구 한국폐기물학회) 2014 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2014 No.-
유기성 폐자원의 생물학적 전환과정에서 생산되는 바이오가스의 분리공정은 크게 바이오메탄 생산을 위한 CH<sub>4</sub> 고질화 공정과 CO<sub>2</sub> 를 분리이용하기 위한 CO<sub>2</sub> 회수공정으로 분류될 수 있다. 본 연구에서는 중공사 기체분리막 모듈을 이용하여 각각의 분리공정에 대한 최적 운전조건을 도출하였다. CO<sub>2</sub> 회수실험에서는 모듈의 배열을 다양하게 실험하여 95% 이상의 고농도 CO<sub>2</sub> 회수가 가능한 모듈배열을 확인하였으며, CH<sub>4</sub> 회수실험에서도 모듈배열을 다양하게 실험한 결과 97% 이상의 CH<sub>4</sub> 농도와 최대 79% 이상의 CH<sub>4</sub> 회수율을 얻을 수 있는 모듈배열을 찾았다. 중공사막 모듈을 이용한 바이오가스 분리기술을 적용하여 바이오가스에서 CO<sub>2</sub> 와 CH<sub>4</sub> 의 분리를 위한 각각의 최적 모듈구성을 확인하였다.
권오훈(O Hoon Kwon) 한국기독교학회 2011 한국기독교신학논총 Vol.73 No.-
John Wesley, the founder of Methodism, believed that faith working through love (Galatians 5:6) is the essence of true religion and a true Christian. The author thus studies further each component of John Wesley`s faith working through love based on John Wesley`s 53 Standard Sermons. The Standard Sermons, along with his Explanatory Notes upon the New Testament, were set forward by John Wesley for doctrinal standards of Methodists in 1763. In chapter 2, the author deals with grace and faith as the gift of God. Grace makes good works unnecessary. Faith is not something a Christian earns through meritorious work; it is the free gift of God (Eph. 2:8-9). In chapter 3, the author handles good works as outward signs of inward faith and love. Although faith is glorious and honorable, it is still only the handmaid of love. Only love is the sum of perfection in heaven. Good works are an immediate and necessary fruit of faith. Wesley urges Christians to be zealous of works of mercy, as well as works of piety. In chapter 4, the author discusses Christian perfection as holy love/loving-holiness. Full sanctification and complete salvation are God`s gradual or instantaneous great work in the soul. Christian perfection is holiness and love combined. Faith working through love produces obedience and holiness. It is all inward and outward holiness. It leads us into a new creation, all things in us becoming new. The author concludes this article by emphasizing that John Wesley`s holistic concept holy love/loving-holiness can be an antidote for Korean Christianity which is sharply divided by a holiness-oriented group (works of piety, evangelism) and a love-oriented group (works of mercy, social responsibility). According to John Wesley, a true Christian can be truly evangelical and truly social concurrently.
권오훈,김종 에스케이텔레콤 (주) 2003 Telecommunications Review Vol.13 No.2
인터넷을 기반으로 다양한 응용 서비스들이 통합됨에 따라 서비스 품질(QoS, Quality of Service)과 보안을 동시에 요구하는 경우가 많아지고 있다. 따라서 최근에는 다양한 품질의 보안 서비스를 지원하기 위한 보안 서비스 품질모델에 대한 연구, 기존의 서비스 품질 모델의 보안 취약점을 보완하는 기술에 대한 연구 등 크게 두 가지 방향의 연구가 이루어지고 있다. 본 논문에서는 이와 같은 보안과 서비스 품질의 연동 기술에 대한 연구 동향을 소개하고 향후 연구되어야 할 문제들을 살펴 본다.
권오훈 한국수자원학회 1977 한국수자원학회논문집 Vol.10 No.1
The empirical area-reduction method by W.M. Borland and C.R. Miller and its revised procedure by W.T. Moody were made of fitting the area and storage curves to the Van't Hul distributions. It should be noted that the reservoir is classified into one of the four standard types on the basis of the topographical feature of the reservoir in application of the method. In other words, this method did not take into account several considerafble factors affecting the mode of sediment deposition, but only the shape of the reservoir as a governign factor. This is why the method occasionally creates ambiguity in classification and accordingly leads to unexpected mode of deposition. This paper describes a generating an formula to decide the standard classification of four types Van's Hul distributions, taking into consideration quantitatively sediment-loss percent and capacity-inflow ratio as well as the shape of the reservoirs by multiple regression analysis using the least square method to get a better fit to the design curves. The result is expressed as $Y=-1.95+55.8X_1+0.14X_2+0.12X_3$ in which the the values of Y locate the standard type I through type IV in the range from ten to forty with the interval of ten. The regression analysis was correlated well with the standard errors of estimate of around two except for the case of the type IV. This formula does not give big difference from the Borland's work in general sityation, but it demonstrates acceptable results, giving somewhat precise replys for the specific reservoirs. Its application to the Soyang Lake, one of the largest reservoirs in the country, defined clearly the type II, while the original method located it in the boundary of the type II and type III.