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이원근(Won-Keun Lee) 한국태양에너지학회 1992 한국태양에너지학회 논문집 Vol.12 No.2
본 연구에서는 자연형 태양열 시스템의 하나인 축열벽혁 (Trombe Wall System)에 대한 전산해석을 수행하였다. 자연대류가 있는 2차원 정상사태 층류 해석모형을 설정하고, 상용 유동해석 프로그램인 PHOENICS를 이용하여 형상 변화가 성능에 미치는 영향을 검토하였다. 주된 인자인 통기구 넓이, 벽 간격, 통기구 위치에 따라 질량유속, 최고온도 등이 변하여 각각의 경우에 열활용율이 최대가 되는 조건이 있음을 보이고, 세가지 인자를 모두 고려한 더욱 정밀한 해석을 통하여 최적의 형상을 제시하였다. A numerical study on the Thrombi wall system, a kind of passive solar systems, has been performed. The system is modelled as the 2-dimensional steady laminar flow with the natural convection. The PHOENICS code was employed to analyse the performance variation due to the change in the geometrical factor. The mass flow rate and the maximum temperature are changed by the variations in the width of the vents, the width between the window and the wall, and the location of the vents. And there exists the optimal condition to maximize the utilization factor. Further precise analysis has been performed to show the optimal geometry with regard to the above three factors.
이원근 ( Won Keun Lee ) 한국국제무역학회 2002 國際貿易硏究 = Journal of international trade studies Vol.8 No.1
본 연구는 중국의 중·근대 관세제도에 대한 역사적 고찰이다. 중국에 있어서 관세제도의 기원에 대해서는 명확하지는 않지만 주왕조 때 이미 관세가 존재하고 있었던 것으로 보여지나 국가간 교역량이 적어 내국관세으로서의 통과세가 주된 것이었다. 그러나 中代에 이르러서는 당 왕조와 같이 거대한 통일국가가 성립하면서 처음으로 외국과의 해상교역이 시작되었고 늘어나는 교역이익을 통제할 필요성이 요구되었다. 이에 보조를 같이하여 처음으로 금일의 세관에 해당되는 市舶司가 설립되었으며, 관세도 하나의 제도화된 형태로 나타나기 시작하였다. 近代에 들어서면서 중국에 대한 서구 열강들의 침탈이 강화되면서 중국관세조직에 대한 외국인의 참여가 증대되면서 전통적인 중국의 관세제도는 자취를 감추고 금일과 같은 서구화된 海關형태를 갖추게 되었다. Customs serves as a important means in financial and economic policy in every countries and it`s historical study provides us with many valuable materials that be of help to understand a change of customs system in the future. This study lays emphasis on collecting and analyzing materials of korean ancient customs system through historical study for chinese customs systems which have had influence on korean history directly and indirectly. All of the dynasty in china in ancient times mainly imposed transit duties in spite of there was a customhouse in the border and the volume of trade between countries was not so much in medieval times, importance for customs have been increased by means of active transaction at home or abroad in consequence, in the tang dynasty a special customs system which is called as Shih-po-ssu(市舶司) has been appeared in chinese customs history for the first time. in modem times, as national strength of china gradually went into a decline, customs business have been controlled by foreign office.
이원근(Lee, Won Keun) 한국무역상무학회 2010 貿易商務硏究 Vol.47 No.-
The Ministry of Agriculture, Forestry and Fisheries(MAFF) of Japan established the aim which exports the agriculture, forestry and Fisheries products amounting to a trillion Yen until 2013 in 2004, endeavoring to realize the aim in strengthening both overseas publicity activities and domestic product system. Such changes means that the Japanese agriculture is exchanging defence into attack and gives a important meaning to our agricultures which have a similar agriculture base as Japan. The countermeasures for agricultural products export promotion by MAFF is greeting a 5th year now and obtains a considerable result in agricultural products exports and the export item. Meantime, There are also opinions that the Japanese agriculture has to make efforts to cut the product cost by a large margin in order to prepares a competitive power. we have to consider the counter-measure which will be able to accommodate harmoniously both of two facts that first, Japanese Export Promotion Strategy for agricultural products is giving a hope in the Japanese rural society which have been considered that remaking will be impossible until now, and secondly, the agricultural reform which the cutting of cost and price of agricultural products will be possible in has to be promoted.