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李宜明 陸軍士官學校 1985 한국군사학논집 Vol.29 No.-
Korean peasants had raised silkworms from the ancient time. The main purpose of the sericulture, however was not for the income of peasants, but for the production of tribute(貢物). The object of this paper is to study when Korean sericulture became the subsidiary business of peasants, why and how it proceeded. The conclusions of my study are as follows. First, from the 16th century Korean sericulture became the subsidiary business of peasants. Next, two historical conditions played as decisive roles for the development of Korean sericulture at that time; the government's development policy of sericulture and the profit of peasants. The development policy of sericulture was strongly propelled by each king of the Yi-dynasty in the 15th and the 16th century; and it included the establishment of cocoonery, the publication of sericultural book, the encouragement of planting the mulberry, and the religious service for Cocoon-god etc.
地震波의 不規則한 走時曲線에 의한 花崗土 地盤의 動的 土質定數 推定
鄭斗永,李義明 全北大學校 1989 論文集 Vol.31 No.-
In this study, in a case of the irregular Time-Distance Curves the analysis method was studied, therefore this method was used for evaluation of dynamic soil parameter in the weathered granite soil. Then, the utilization of the concept of a delay time and the application of phantoming was to evaluate the time-distance for the refracted waves in a measuring line and the depth in the detector point. From the results it was found that how much was Poisson's ratio influenced in the relationship between Vp and E, and Vs and G, and these data related in the correlation between N-values and Vs.