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김문성(Mun Sung Kim),박종진(Jong Jin Park),안영규(Young Kyu Ahn),김홍수(Hong Su Kim),전호환(Ho Hwan Chun) 한국해양공학회 2015 韓國海洋工學會誌 Vol.29 No.4
With the increases in oil and gas prices, and energy consumption, drillship construction has increased during the last decade. A drillship using a dynamic positioning (DP) system to maintain its position and heading angle during drilling operations. In addition, a drillship is equipped with a moonpool structure to allow its drilling systems to be operated in the midship section. A drillship for the North Sea is specially designed to endure harsh environmental loads. For safe operation in the North Sea, the drillship should have good motion response and robust hull strength. A break water should be considered on the bow and side deck to prevent the green water on deck phenomenon from oncoming waves. In addition, the moonpool should be designed to reduce the speed loss and resonance motion. In this study, the hydrodynamic characteristics of a drillship for the North Sea were examined in relation to the motion, wave loads, green water, and moonpool resonance in the initial design stage.
김문성(Mun Sung Kim) 한국정책분석평가학회 2006 政策分析評價學會報 Vol.16 No.1
The goal of water resources policy is the maintenance of water quality and quantity. However, it is fundamental policy discord between the development of water quantity and the maintenance of water quality. This discord is the critical factor to make a big difference among the departments of the government and between the government and NGOs. The Water Quality Improvement Association was closed in 2004 without building an alternative organization, which was entrusted with top organization in Office of the Prime Minister for integrating water resources management policy. Although WQIA had not been working as expected, the closing of WQIA as the coordinating organization resulted in being unable to make comprehensive water policy. So the government is planning to rebuilding the integrated water resources management system. But this plan is not yet implemented because of the conflicts of the participators who have trade off relationship. Because of situation, this study suggests the direction for reforming the water management organization system.
김문성(Mun-Sung Kim),송우용(Woo-Yong Song),한심희(Sim-Hee Han),신수정(Soo-Jeong Shin) 한국펄프·종이공학회 2018 펄프.종이기술 Vol.50 No.4
Soda-anthraquinone (AQ) pulping of Fraxinus mandshurica was investigated with focused on Kappa number, yield, carbohydrate compositional change, and fiber characteristics with different pulping time. In chemical composition, Fraxinus mandshurica had similar lignin content with eucalyptus and higher polysaccharides content than yellow poplar or eucalyptus. Yield and Kappa number of Fraxinus mandshurica soda-AQ pulp was similar to yellow poplar or eucalyptus. Fraxinus mandshurica had more polysaccharides than yellow poplar, eucalyptus with higher xylan content than others based on wood chip. However, xylan in Fraxinus mandshurica was more degraded in soda-anthraquinone pulping process than others, with lower xylan content in soda-AQ pulps. Fiber length and width of Fraxinus mandshurica soda-anthraquinone pulp showed similar to pulp from yellow poplar.