• Proceedings of the Korean Vacuum Society Conference
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• 2002.06a
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• pp.104-104
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• 2002

• Proceedings of the KTCVS Conference
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• 1996.10a
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• pp.28-28
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• 1996

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2001.05a
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• pp.64-67
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• 2001

• Proceedings of the Korean Magnestics Society Conference
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• 1999.10a
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• pp.110-111
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• 1999

• Proceedings of the PSK Conference
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• 2001.10a
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• pp.238.1-238.1
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• 2001

• Proceedings of the Korean Magnestics Society Conference
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• 2000.09a
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• pp.504-505
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• 2000

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.5
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• pp.597-603
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• 2018

This Study investigates the Structural Integrity of Boats for Divers, given increased demands for Underwater and Recreational use. We conducted research on a Small Catamaran with a Moon Pool in the center of the Hull, using the Finite Element Method to calculate allowable stress based on the ISO Rule. We computed the coefficients defined in ISO 12215-5 and TC118.1225-7, and determined the suitability of using the ISO Standard and Allowable Stress Design method (ASD) by applying Longitudinal Bending Moment, Torsional moment, and Bottom Slamming Load. We also applied the Ultimate Strength Design Method (LFRD) using Finite Element Analysis (FEA). As a Result of this Research, it was found that ships with a Moon Pool do have Structural Integrity according to their Design in accordance with ISO and KR Regulations.

• Proceedings of the KAIS Fall Conference
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• 2008.11a
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• pp.379-381
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• 2008

본 논문에서는 도시의 소음문제와 기존 방음벽의 문제를 근본적으로 해결하기 위해서는 도시 생태계를 고려한 생태식생방음벽의 개발이 필요하며 이를 위해 시스템 및 소재개발, 설계 및 시공기술들을 개발이 필요하다. 방음벽의 소음의 저감을 위한 단순한 구조물차원을 벗어나 소음 저감 기능을 가지는 환경친화적인 녹화구조물로 개발될 필요가 있다. 이는 절대 녹지의 부족과 단절로 인해 파생되는 도시 생태적 문제를 적극적으로 해결할 수 있는 현실적인 대안이 될 수 있을 뿐만 아니라, 도시경관 및 운전자와 주민 정서의 순화에 크게 기여할 것으로 예상된다. 결론적으로, 도시생태환경에 악영향을 가져왔던 기존의 방음벽에 반해서, 도시 전체적으로 녹지의 확대와 더불어 경관의 향상, 생태계 복원 등 시너지 효과를 가져올 식생방음벽의 개발은 도시환경의 질적 개선을 위한 현실적인 대안으로 연구 개발이 필요하다고 판단된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3080-3086
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• 2009

We have analyzed the output characteristics of a LGP with pyramid shaped pattern by using a 3-D simulation tool. The influences on the LGP output of various parameters such as the pattern shape, pattern occupation ratio, pattern size, and etching angle were investigated. Comparing the pyramid shaped pattern with hemispherical patterns, little difference was observed. And, it was proved that the pattern occupation ratio and etching angle have relatively large effects on LGP output characteristics, while the pattern size has no effect. Therefore, we can improve the LGP characteristics by optimizing pattern structure and distribution.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.2
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• pp.208-216
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• 2014

Ground station in lunar mission is responsible to receive telemetry signal including sensor data from lunar orbiter and/or lander. At preliminary stage of developing this ground station, receiving performance such as antenna size and noise temperature should be designed on the basis of link budget analysis. When the antenna of ground station is pointing to the moon to communicate with lunar orbiter and/or lander, noise level is supposed to be increasing due to the lunar flux density. It means that the moon is working as a noise source to degrade receiving performance when antenna is pointing to the moon. Antenna noise temperature contributed by the moon was firstly calculated and secondary validated by using test configuration in this paper. Consequently, it was shown that antenna noise temperature caused by the moon was quietly matched with measured one and G/T degradation of receiving system in lunar mission can be calculated depending on antenna size and frequency.