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이창근,강형태,고성희,Lee, Chang-Keun,Kang, Hyung-Tai,Goh, Sung-Hee 국립문화재연구소 1987 保存科學硏究 Vol.8 No.-
Fifty ancient Korean coins originated in Choson dynasty have been determined for 9 elements such as Sn, Fe, As, Ag, Co, Sb, Ir, Ru and Ni by instrumental neutron activation analysis and for 3 elements such as Cu, Pb, and Zn by atomicalsorption spectrometry. Bronze coins originated in early days of the dynasty contain as major constituents Cu, Pb and Sn approximately in the ratio 90 : 4 : 3, where as, those in latter days contain in the ratio 7 : 2 : 0. Brass coins which had begun in 17century contain as major constituents Cu, Zn and Pb approximately in the ratio 7 : 1: 1. The multivariate date have been analyzed for the relation among elemental contents through the variance-covariance matrix. The data have been fur theranalyzed by a principal component mapping method. As the results training set of 8class have been chosen, based on the spread of sample points in an eigenvector plotand archaeolgical data such as age and the office of minting.
화물과 트롤리가 만드는 로프각이 화물의 진자운동에 미치는 영향: 적합조건과 분기조건
신장용(JANG-RYONG SHIN),고성희(SUNG-HEE GOH),홍경태(KYUNG-TAE HONG),홍금식(KEUM-SHIK HONG) 한국해양공학회 2005 韓國海洋工學會誌 Vol.19 No.2
This paper investigates the relationship between the fleet-angle of the hoisting rope and the swaying and pitching angles of a cargo in container cranes. It is found that for a given disturbance, when the fleet-angle is large, the sway Angle becomes smaller, but the pitching angle becomes larger. Therefore, for a quick suppression of a sway motion, it is desirable to have a large fleet-an gle. The compatibility and bifurcation conditions, regarding instability, are characterized.
로프각이 화물의 진자운동에 미치는 영향: 설계력의 계산
신장용(JANG-RYONG SHIN),박영현(YONG-HYUN PARK),고성희(SUNG-HEE GOH),홍금식(KEUM-SHIK HONG) 한국해양공학회 2005 韓國海洋工學會誌 Vol.19 No.1
Over the last 10 years, significant changes have taken place in the world of container shipping. The size and the speed of the quay-side crane have been increased considerably. As a result, the stiffness of a crane is decreased and the sway oscillation of cargo may become violent. The purpose of this paper is to determine the design force caused by the sway oscillation of the cargo, lifted by four ropes, with an initial fleet angle, and the governing equations of the lifting system for an anti-sway control system design.