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파력발전 적지 선정을 위한 제주 해역 파랑에너지 분포특성 연구
홍기용(KEY-YONG HONG),류황진(HWANG-JIN RYU),신승호(SEUNG-HO SHIN),홍석원(SEOK-WON HONG) 한국해양공학회 2004 韓國海洋工學會誌 Vol.18 No.6
Wave power distribution is investigated to determine the optimal sites for wave power generation at Jeju sea which has the highest wave energy density in the Korean coastal waters. The spatial and seasonal variation of wave power per unit length is calculated in the Jeju sea area based on the monthly mean wave data from 1979 to 2002 which is produced by the SWAN wave model simulation in prior research. The selected favorable locations for wave power generation are compared in terms of magnitude of wave energy density and distribution characteristics of wave parameters. The results suggest that Chagui-Do is the most optimal site for wave power generation in the Jeju sea. The seasonal distribution of wave energy density reveals that the highest wave energy density occurs in the northwest sea in the winter and it is dominated by wind waves, while the second highest one happens at south sea in the summer and it is dominated by a swell sea. The annual average of wave energy density shows that it gradually increases from east to west of the Jeju sea. At Chagui-Do, the energy density of the sea swell sea is relatively uniform while the energy density of the wind waves is variable and strong in the winter.
홍기용 ( Hong Ki Yong ),강명훈 ( Myung Hun Kang ) 한국지역개발학회 1993 韓國地域開發學會誌 Vol.5 No.1
The Purpose of this study, is to identify and evaluate the economic performance of various regions except for Seoul during 1988-1989 by using regional gross products data from the Ministry of Domestic Affairs. Various research methods such ogive, entropy index and multiple regression are employed to meet the research objectives. The major finding are as follows ; 1. The big-sized urban regions including metropolitan expect Seoul, Pusan and Daegu areas produces 57 percent of national gross production(GNP), followed by the medium-sized areas with 22 percent and the small-sized regions with 20 percent. 2. The regional industrial specialization is well under-performed through local resources in Korea. The food industry tends to concentrate in small-sized region while the textile and metal industries in the medium-sized regions. The big-sized regions has the highest specialization index in high technology and chemical industries. 3. The productivity in manufacturing industry is twice as much as any other industries and five times more than agriculturc and fisheries. And rural regions shows the highest labor pro ductivity over whole industries and the big-sized urban regions have the lowest labor productivity. In fact, the small-sized urban regions have the highest labor productivity, but the big-sized urban regions show the lowest. 4. The industrial specialization index given by ogive and entropy measures shows that the small-sized regions perform well in the process of industrial diversification and the big-sized urban regions perform relatively less. 5. The regression analysis by using regional production function statistically fit well in most research models. The research results reveals that the regional congestion costs will increase by growth in amount of agriculture and fisheries production over any other industries and decrease in space utility by the industries. This means that the congestion costs and space utility of industry location are important factors to increase absolute amount of production.
홍기용(Gi-Yong Hong),응오 꽝 히오(Quang Hieu Ngo),홍금식(Keum-Shik Hong) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
The offshore container crane is used to load/unload containers between a huge container ship (called the “other ship” and a smaller ship (called the “obile harbor”, on which the crane is installed. The purpose of the mobile harbor is to load/unload containers in the open sea and transport them to shallower water where they can be offloaded at existing conventional ports, thereby obviating the need for expansive and expensive new facilities. In the paper, the pendulum motion (i.e., “way” of the load in the presence of the waveinduced movements (heave, roll, and pitch) of the mobile harbor is discussed. A Stewart platform and 3D pilot crane have been used to demonstrate the ship and pendulum motions to verify the dynamics of the offshore container crane.