• The Science & Technology
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• v.19 no.3 s.202
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• pp.59-63
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• 1986

• Korean Architects
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• v.5 no.4 s.20
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• pp.67-68
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• 1970

• Proceedings of the Korean Nuclear Society Conference
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• 2003.10a
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• pp.419-419
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• 2003

• Journal of Korea Fair Competition Federation
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• no.124
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• pp.20-46
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• 2006

• Digital Contents
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• no.5 s.84
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• pp.80-85
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• 2000

• Proceedings of the Korean Nuclear Society Conference
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• 1997.10a
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• pp.152-157
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• 1997

To test the viability of CANFLEX-SEU bundles in an existing CANDU 6 reactor, core follow-up simulation has been carried out using the reactor fueling simulation program of the CANDU 6, RFSP computer code, and a lattice physics code, WIMS-AECL. During the core follow-up, bundle and channel powers and zone levels have been checked against their operating limits at each simulation. It is observed from the simulation results that an equilibrium core loaded with 0.9 w/o CANFLEX-SEU bundles could be refueled ,and maintained for 550 FPD without any significant violations in the channel and bundle power limits and the permissible operating range of the liquid zone controllers.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.2
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• pp.417-422
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• 2010

When memory devices are exposed to space environments, they suffer various effects such as SEU(Single Event Upset). Memory systems for space applications are generally equipped with error detection and correction(EDAC) logics against SEUs. In this paper, several error detection and correction codes - RS(10,8) code, (7,4) Hamming code and (16,8) code - are analyzed and compared with each other. Each code is implemented using VHDL and its performances(encoding/decoding speed, required memory size) are compared. Also the failure probability equation of each EDAC code is derived, and the probability value is analyzed for various occurrence rates of SEUs which the STSAT-3 possibly suffers. Finally, the EDAC algorithm for STSAT-3 is determined based on the comparison results.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.6
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• pp.519-524
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• 2007

The OBC(on-board computer) of a satellite which plays a role of the controller for the satellite should be equipped with preventive measures against transient errors caused by SEU(single event upset). Since memory devices are pretty much susceptible to these transient errors, it is essential to protect memory devices against SFU. A common method exploits an error detection and correction code and additional memory devices, combined with periodic memory scrubbing. This paper proposes an effective memory scrubbing scheme for the OBC of STSAT-2. The memory system of the OBC is briefly mentioned and the reliability of the information stored in the memory system is analyzed. The result of the reliability analysis shows that there exist optimal scrubbing periods achieving the maximum reliability for allowed overall scrubbing overhead and they are dependent on the significance of the information stored. These optimal scrubbing periods from a reliability point of view are derived analytically.

• 어항어장
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• s.80
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• pp.38-42
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• 2007

아오모리현에서는 천연해초 조장 및 이식 해초 조장에 해삼 치자 착저를 기대할 수 있는 가리비 패각을 살포해 해삼 유생의 착저효과나 살포 후의 생물 모습의 변화 등에 대하여 조사를 실시하고 있다.

• KLA journal
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• v.4 no.5
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• pp.30-32
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• 1963

본고는 UNESCO의 Division of Libraries, Documentation and Archives에 제출된 회원국의 국제교환사업 보고문중의 일편으로서 EXCHANGE OF PUBLICATION Circular No. 27에 게재된 Pakistan 분의 전문번역입니다.