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이욱,이욱(2) 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
VFA(Vinylformamide)는 독성이 강한 Acrylamide를 대체할 수 있는 새로운 물질로 대두되고 있으며 VFA를 이용하여 다양한 형태의 PVAm(Polyvinylamine)을 합성하여 제지공정에 다양한 용도로 적용이 가능하다. 현재 제지산업의 가장 큰 목표는 기존 종이물성을 유지하면서 filler(탄산칼슘)의 첨가량을 늘려 원가절감을 실현하는 것으로 이러한 과정에서 종이 강도 저하, 인쇄품질 저하, 공정오염 등의 많은 문제가 발생되며 이러한 문제를 해결할 수 있는 약품으로 PVAm이 주목받고 있다.
朴範鎭,宋七永,金宣我,李寅世,李承雨,전양,李旭 忠南大學校 環境問題硏究所 1996 環境硏究 Vol.14 No.-
Growth analysis of Quercus mongolica and Juglans manshurica was carried out in Chungju experimental forest, Chungnam National University. Quercus mongolica stand is natural and Juglans manshurica stand is plantation. Average age is 67 and 25 years, respectively. Average tree of each species was selected and after diameter measuring disks were taken at 30㎝ from the ground. The number of annual rings were counted and ratio of root collar diameter(RCD) was calculated. Tree hight was estimated with the equation of root collar diameter and T-test was followed. Individual tree volume of each ages was computed with Smalian's equation and growth ratio of individual tree volume was calculated. Equation form of growth ratio was ??=(??-??)/?? × 100; ?? is growth ratio in %, ?? is RCD, Hight and volume in measuring in cm, m, ㎥, di is RCD, Hight and volume after n(=5) years from the time measured in cm, m, ㎥ and estimate equation of hight was H-??; H is tree hight in m, a is a constant, b is an exponent. Values of measurement and estimate was compared with T-test resulted with no significant difference at P≤0.05. Stand stock was 130.88㎥/ha in Quercus mongolica and 66.05㎥/ha in Juglans manshurica. Annual growth ratio of components were as follows in beginning five years; increment ratio of RCD was 118.45%, growth ratio of tree hight was 56.57%, growth ratio of tree volume was 3649.99% in Quercus mongolica, respectively and in Juglans manshurica, increment ratio of RCD was 189.41%, growth ratio of tree hight was 98.24%, growth ratio of tree volume was 8506.85% respectively. In recent five years, annual growth ratio of components were as follows; increment ratio of RCD was 2.88%, growth ratio of hight was 1.96%, growth ratio of tree volume was 8.52% in Quercus mongolica, respectively and in Juglans manshurica, increment ratio of RCD was 3.39%, growth ratio of hight was 2.49%, growth ratio of tree volume was 10.53% respectively. From the result of growth analysis, Annual growth ratio in beginning and recent five years were shown higher in plantation of Juglans manshurica than in Quercus mongolica in all part of RCD, hight and individual tree volume. We knew that the increment of individual tree volume depended upon the ratio of beginning growth. Therefore, the success of effective forest management relied upon if it could improve beginning growth and how long could it be continued to maintain the ratio of beginning growth.
李旭,金南俊 대진대학교 1993 大眞論叢 Vol.1 No.-
This paper describes the fuzzy logic controller for the speed control of induction motor. For the change of the load inertia moment and load torque, compared with the conventional PI controller, the performance of the speed controller using fuzzy algorithm is investigated. Simulation and experimental results show that the speed controller using fuzzy algorithm is more robust than the conventional PI controller
이욱 농업협동조합중앙회 2004 농협조사월보 Vol.561 No.-
WTO 체제 출범 이후 농산물 수입이 증가하면서 주요 농산물의 재배면적과 재배농가수가 감소하는 등 생산기반이 약화되었으며, 경쟁력이 낮은 품목은 수입 농산물에 의해 대체되면서 산업이 위축되고 있다. 일부 식량작물과 특용작물의 경우 고율의 양허관세 부과에도 불구하고 국산의 가격 경쟁력이 낮아 수입산의 비중이 국내 생산을 넘어섰고, 가격 경쟁력이 있는 일부 신선 품목들도 단순 가공품에 대한 역관세 체계로 인해 실질적인 산업보호가 이루어지지 못하고 있는 실정이다. 또한 현행 양허관세 수준이 국내외 가격차보다 높은 품목은 일부에 불과한 반면, 대부분의 품목은 양허관세가 국내외 가격차보다 낮아 추가로 관세가 인하펼 경우 많은 피해가 예상된다. 이러한 상황하에서 현재 진행중인 DDA 농업협상은 관세 수준별 품목군에 따라 각각 다른 관세 감축률을 적용하고, 민감 품목에 대해서는 낮은 관세 감축률을 적용하는 방향으로 회원국들의 의견이 모아지고 있다. 따라서 DDA 농업협상에서 민감품목 선정과 품목군 분류를 위한 연구가 필요하며, 본고에서는 이러한 연구의 일환으로 주요 농축산물의 수입과 생산동향,가격 경쟁력, 관세수준 등을 살펴보고, 국내 농업비중, 수입상황, 양허관세와 국내외 가격차 등을 기준으로 품목분류를 실시하였다.