• 대한조선학회논문집
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• 제46권6호
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• pp.595-602
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• 2009

Great number of ships has been built by Korean Shipyards since early of 2,000 due to the expanding worldwide trade. Most of shipyards have enlarged the weight of erection block and many blocks have been assembled in block fabrication factories outside the shipyards to reduce the shipbuilding period. Especially, Giga blocks that exceed 2,000 tons are often assembled by the block fabrication factories outside the shipyard. Generally, the blocks are transported to building dock in shipyard by towing barges. Accident can be occurred during the sea transportation and it may bring about not only the delay of delivery but also a disaster on the ocean environments. Transportation condition of GPE (Grand Pre-Erection) block differs from the ocean going conditions of marine vessels. Special consideration should be included before transportation work in order to guarantee the safety of GPE blocks and barge carriers. In this paper, several examples, which have been investigated to set up the safety standard of transportation of the GPE blocks on coastal routes, are introduced. For the barge transportation on coastal sea route, the design criteria are discussed, considering the design wave, the acceleration induced by wave, structural strength, and the fixture condition of blocks.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.2275-2276
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• 2008

Currently the quarter prediction giga it is used SE3208 from EISC ISA [1]] where it does in base. But the prediction which is perfect is difficult improved Pipeline structures and PC the structure which is not Delay to add it decided. Even PC and IF/ID blocks, the area and expense were added, but Bubble without it will be able to control Conditional Branch doors and the possibility of decreasing a help in processor performance improvements.

• International Journal of Naval Architecture and Ocean Engineering
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• 제10권1호
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• pp.95-102
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• 2018

This paper proposes a dual lifting and its cooperative control system with two different kinds of floating cranes. The Mega-erection and Giga-erection in the ship building are used to handle heavier and wider blocks and modules as ships and off-shore platforms are enlarged. However, there is no equipment to handle such Tera-blocks. In order to overcome the limit on performance of existing floating cranes, the dual lifting is proposed in this research. In the dual lifting, two floating cranes are well-coordinated to add up the lift capabilities of both cranes without any loss such that virtually a single crane is lifting, maneuvering and unloading. Two main constraints for the dual lifting are as follows: First, two barges of floating cranes should be constrained as a rigid body not to cause a relative motion between two barges and main hooks of the two cranes should be controlled as main hooks of a single crane. In order words, it is necessary to develop the cooperative control of two floating cranes in order to sustain a center of gravity of the module and minimize the tilting angle during the lifting and unloading by the two floating cranes. Two floating cranes are handled as a master-slave system. The master crane is able to gather information about all working conditions and make a decision to control the individual hook speed, which communicates the slave crane by TCP/IP. The developed control system has been embedded in the real floating crane systems and the dual lifting has been demonstrated five times at SHI shipyard in 2015. The moving angles of the lifting module are analyzed and verified to be suitable for hoisting control. It is verified that the dual lifting can be applied for many heavier and wider blocks and modules to shorten the construction time of ships and off-shore platforms.

• 한국정보통신학회논문지
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• 제21권6호
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• pp.1075-1082
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• 2017

본 논문에서는 새로운 해쉬 알고리듬인 SHA-3과 출력 길이 확장함수인 SHAKE256을 구현하는 해쉬 프로세서를 설계하였다. 해쉬 프로세서는 성능을 극대화하기 위해 Padder 블록, 라운드 코어 블록, 출력 블록이 블록 단계에서 파이프라인 구조로 동작한다. Padder 블록은 가변길이의 입력을 여러 개의 블록으로 만들고, 라운드 코어 블록은 on-the-fly 라운드 상수 생성기를 사용하여 SHA-3와 SHAKE256에 대응하는 해쉬 및 출력 확장 결과를 생성하며, 출력 블록은 결과 값을 호스트로 전달하는 기능을 수행한다. 해쉬 프로세서는 Xilinx Virtex-5 FPGA에서 최대 동작 속도는 220 MHz이며, SHA3-512의 경우 5.28 Gbps의 처리율을 갖는다. 프로세서는 SHA-3 와 SHAKE-256 알고리듬을 지원하므로 무결성, 키 생성, 난수 생성 등의 암호 분야에 응용이 가능하다.