• Proceedings of the KIEE Conference
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• 2006.11a
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• pp.57-59
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• 2006

에너지저장소자로 커패시터를 이용하여 순간정전 또는 순간전압강하 방지의 목적으로 사용되는 동적전압보상장치(Dynamic Voltage Restorer)에 울트라커패시터를 적용/시험하였다. 이로부터 울트라커패시터의 적용가능성을 에너지저장소자들 간의 출력특성 관점에서 비교하였다.

• Proceedings of the Korean Nuclear Society Conference
• /
• 1998.05a
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• pp.329-334
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• 1998

원자력발전소와 같이 복잡하고 안전성이 강조되는 경보처리 및 표시계통은 개발개념의 적합성 (설계요건의 타당성), 적용된 알고리즘의 완결성(지식기반과 소프트웨어의 확인)과 인간공학적 유용성의 평가가 상당히 중요하다. 동적 경보계통(Alarm and Diagnosis-Integrated Operator Support System : ADIOS)은 다음과 같은 실험을 통해 경보처리 알고리즘의 완결성과 인간공학적 유용성을 확인하였다.·예비기능시험(Preliminary functional test)·Petri net 을 이용한 알고리즘의 완결성 확인(Verification)·전규모 시뮬레이션 환경에서의 인간공학적 성능평가(Validation and Evaluation)

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2005.05a
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• pp.347-347
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• 2005

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2011.09a
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• pp.187-191
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• 2011

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.11a
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• pp.239-240
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• 2008

• 한국도로학회:학술대회논문집
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• 2004.02a
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• pp.75-84
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• 2004

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2005.10a
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• pp.225-241
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• 2005

• Proceedings of the KWS Conference
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• 2001.10a
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• pp.247-251
• /
• 2001

• Tunnel and Underground Space
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• v.13 no.3
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• pp.180-186
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• 2003

The fracture processes under dynamic loading in tension were simulated using a proposed numerical approach and analyzed to determine dynamic tensile strength. The dynamic tensile strength and the scatter of the strength data decreased with increasing uniformity coefficients. The differences of static and dynamic tensile strength were due to the stress concentrations and redistribution mechanisms in the rock specimen. Although there were different mechanisms for the static and dynamic fracture processes, the static and dynamic tensile strengths were close to the mean microscopic tensile strength at high values of the uniformity coefficient. This paper shows that the rock inhomogeneity has an effect on dynamic tensile strength and is a factor that contributes to the different specimen strengths under dynamic and static loading conditions.

• Journal of the Korean Geotechnical Society
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• v.21 no.8
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• pp.55-61
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• 2005

Mononobe-Okabe method is generally used to evaluate dynamic earth pressure for the seismic design of retaining walls. However, Mononobe-Okabe method does not consider the effects of dynamic interactions between backfill soil and walls. In this research, shaking table tests on retaining walls were performed to analyze the phase and magnitude of dynamic earth pressure. The unit weight of walls, the amplitude of input acceleration and the base friction coefficient of walls were varied to analyze the influence of these factors on the dynamic earth pressure. Test results showed that the dynamic earth pressure was 180 degrees out of phase with the wall inertia force for the low sliding velocity of the wall, whereas small peaks of the dynamic earth pressure, which are in phase with the wall inertia force, were developed for the high sliding velocity of the wall. The amplitude of dynamic earth pressure was proportional to that of wall acceleration and the unit weight of the wall. In addition, the dynamic earth forces calculated by the Mononobe-Okabe method were the upper limit of the dynamic earth pressures.