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신문고지섬유 혼합 하드보드와 아세틸화섬유 포층구성 하드보드의 물성
이필우(Phil Woo Lee),신용수(Yong Soo Shin),이철주(Cheol Joo Lee) 한국가구학회 1996 한국가구학회지 Vol.7 No.1
Hardboards are made from physical composition and chemical change of the various treatments of raw materials by newly developed processes, and these products have various multilateral uses.<br/> On this research we fabricated ONP(old newspaper) fiber mixed hardboard with ratios of ONP fiber to wood fiber of 0 to 100(control), 30 to 70, 50 to 50. Using PMDI and fabricated surface layer acetylated harddboard with surface layer acetylated fiber to inner layer untreated wood fiber of 0 to 100(control), 30 to 70, 50 to 50.<br/> On the physical properties of ONP fiber mixed hardboard, water absorption and thickness swelling decreased with increasing of ONP fiber mixed level. On Mechanical properties, bending strength decreased with increasing of ONP fiber mixed level, but internal bond strength increased with increasing of ONP fiber mixed IeveI.<br/> The physicl properties of surface layer acetylated hardboard were improved by increasing of ratios of surface layer acetylated wood fiber. However mechanilcal properties Were decreased with increasing of composition ratios of surface layer acetylated fiber.<br/> Key words: Hardboard, ONP(old newspaper) fiber, acetylated fiber, mechanical properties, physic 외 properties.<br/>
申容守 단국대학교 1986 論文集 Vol.20 No.-
Our ancestors interpreted the term, "Loyalty and piety" into "to be loyalty to his country and pious to his parents". Piety is not what you do in the far remoted place but what you can do by your own action. Piety and loyalty in the past age and that in our age are not different altogether. The only difference is that there is the modern social request on its method to recognize the value of it. But there is no difference at all according to the ages in the value system on its quality. If piety is transferred to the side of devotion to the country, it is hightened to loyalty. If it is done in home affairs (in the husband-wife relationship), it does as harmony. If it is acted in the regional socity, it is hightened to credibility. If it is done downward to children or the young, it is expressed as mercy. And if the national leader governs his countrymen with the original quality of piety, it becomes the ethics of loving his countrymen.
전처리한 목섬유로 제조한 섬유판의 물리적 및 기계적 성질
李弼宇,辛榕洙 서울大學校 農業生命科學大學 農業開發硏究所 1996 서울대농학연구지 Vol.21 No.2
This paper reports on dimensional stability of the composites made from acetylated wood-fibers. The fiberboards at this study were made by different face-layer formulation ratios(10, 20, 30, 40 and 50%) of acetylated wood-fibers. In this experiment, acetylation of wood-fiber was reacted with liquid acetic anhydride in stainless steel cylinder. The WPG(weight percent gain) as a result of acetylation was calculated based on the weight of oven-dry untreated wood-fiber, and the 17% WPG could be achieved in reaction time from 2 hours. In physical properties of fiberbodards made from acetylated wood-fiber, thickness swelling and water absorption were more reduced than control fiberboards, but mechanical properties(MOR, MOE and IB) decreased with increasing of face-layer formulation ration of acetylated wood-fibers, which was probably due to poor adhesion and uncontinuous mat forming between acetylated fiberboards and control fiberboards. In the IB test on acetylated fiberboards most failure occurred in the boundary between acetylated face-layer and untreated core-layer. In the acetylated fiberboards, the failure was due to adhesive penetration and compressibility problems associated with acetylated fiber.
申容守 단국대학교 1989 論文集 Vol.23 No.-
As a genius of rarity throughout the 500 years of the Chosun(Yi) Dynasty, Yulgok(1536∼1584) was a great philosopher and statesman, in his time, as well as an educator. His philosophy is a version inherited from Chu Hsi's philosophy of li (active principle) and ch'i (inert matter), which he further refined after its rearrangement and scplematization. Some disputants, however, consider confucianism quite unrelated to modern democracy with their claim that it is a theorry of domination under the feudal system, or with their denunciation that it is not adaptable to modern industrial society as it was developed as a social norm that sustained agricultural society. In fact, these claims sound as plausible as they can be. Now let us fine out if they are as true as they sound. Generally speaking, seeing that an idea or a principle has differed auording to every one's taste from his own point of view throughout the age and across the world, it must be recognized that things will differ through the changes of times and society. As previously stated, the philosophical ideas of Yulgok were mainly developed to insure the people of an enjoyable life in peace, and were integrated into two problems: i (righteousness) as the problem of morality, and li (gain or self-interest) as the problem of living. In other words, i is the problem of the Taoist and li is that of the human heart. Here, Yulgok's cosmism and theory of human nature can be related to each other as the two problems are rooted in the mandate of Heaven.
Prime Ideals and Their Applications in Commutative Rings
Shin, Dong-Soo,Shin, Yong-Su 牧園大學校 1987 論文集 - 牧園大學校 Vol.12 No.-
可換環의 이데알이 어떤 경우에 素이데알이 되며, 그것이 應用에 關하여 硏究하였다.
The Structure of the Reduced Varieties
Lee, Dong-Soo,Shin, Yong-Su 충남대학교 자연과학연구소 1987 忠南科學硏究誌 Vol.14 No.2
일반적으로 다양체의 Hilbert 함수의 계산은 간단하게 할 수 있다. 그러나, 이 논문에서는 역으로 어떤 Hilbert 함수가 있을 때, 그 Hilbert 함수의 다양체에 대하여 연구하였다.