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몽골의 침략과 고려 무인정권 및 삼별초의 ‘島嶼海洋戰略’
姜鳳龍(Bong-yong Kang) 동양사학회 2011 東洋史學硏究 Vol.115 No.-
Facing invasion by the Mongol Empire in 1231, Goryeo immediately relocated its capital from Gaegyeong to Ganghwa Island and moved its people there for safety (called “ip-bo”, 入保). Goryeo’s move to Ganghwa Island exploited the Mongols weakness: attacking over water. As the relocation mainly aimed to secure the sea route by using the island as a strategic foothold with which repel the Mongols, the strategy can be called the “Island-Marine Military Strategy”. The initial Mongolian military strategy had ravaged parts of the Korean peninsula. The second military operation, launched in1250s, focused on attacking the coastal areas and islands of Goryeo to little effect. Thus, the Mongolians intensified the pressure on Goryeo by alternating between armed incursions and peace talks. The Goryeo scholars who had insisted on peace with Mongolia gained greater influence, and Goryeo struck peace with the Mongo Empire in 1270, whereby the capital was moved back to Gaegyeong. However, some military officials, in what was known as the “Sambyeolcho” (a special capital defense unit), refused to surrender and relocated to certain islands (Jin Island and Jeju Island) off the southern shore of the Korean peninsula. They brought the nearby islands and coastal regions under their control and continued to resist the Mongolians for another three years by re-launching the “Island-Marine Military Strategy.” The end to their resistance came with the capture of Jeju Island in 1273 by the Mongolians. However, the Sambyeolcho forces and their sympathizers had not been completely annihilated. Some of the Sambyeolcho forces escaped from Jeju Island and reached Okinawa, while local forces stationed around other islands and coastal regions remained a considerable threat to the Mongolians and Goryeo. In response, the Mongols and Goryeo took the drastic action of ordering “Gongdo”(moving people off the islands) in order to drive out the remaining forces of the rebellion from the islands and coastal regions. In conclusion, the Mongol invasion of Goryeo in the 13th century, which had served as the foundation for their war against East Asia to conquer the Southern Song Dynasty and Japan, led to “Gongdo” following an almost 40 year-long struggle. In retrospect, this move appears to have been a prelude to the imminent “Haegeum” (ban on maritime activities) and the other examples of “Gongdo” seen in East Asia in the 14th century.
강봉용(Bong-Yong Kang),심지연(Ji-Yeon Shim),김일수(Ill-Soo Kim),박동환(Dong-Hwan Park) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Magnetic Pulse Forming (MPF) is one of the most useful forming process of forming ability of the light weight materials such as Aluminum, Magnesium. MPF is a technologies for forming of light weight materials by means of repulsive force on account of the interaction between magnetic field of forming coil and current induced plate. The goal of this study was to develops the magnetic pulse forming system for forming of thin Al sheet. Developed system is consist of magnetic pulse power source, forming coil, interface press. For the verification of developed system performed the 0.5㎜ Al sheet forming experiment.