• Journal of Ceramic Processing Research
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• v.23 no.2
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• pp.109-112
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• 2022

Ni-rich layered material can be regarded as an one of the promising cathode for high-energy lithium ion batteries. In this paper, Ca-doped Ni-rich LiNi_0.8Co_0.1Mn_0.1O₂ cathode material is prepared to investigate the effect of Ca doping on the structural properties and electrochemical performances. In structural properties, there is no obvious difference between the two samples in terms of crystallinity or morphology. In electrochemical performances, the initial capacity and electrochemical behavior are almost identical, while the degree of capacity deterioration in long-term cycle performance is obviously different. This is because Ca doping can increase the bond dissociation energy and pathways for electrons and lithium ions.

• Steel and Composite Structures
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• v.32 no.2
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• pp.265-279
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• 2019

The self-centering capacity and energy dissipation performance have been recognized critically for increasing the seismic performance of structures. This paper presents an innovative steel moment frame with self-centering steel reinforced concrete (SRC) wall panel incorporating replaceable energy dissipation devices (SF-SCWD). The self-centering mechanism and energy dissipation mechanism of the structure were validated by cyclic tests. The earthquake resilience of wall panel has the ability to limit structural damage and residual drift, while the energy dissipation devices located at wall toes are used to dissipate energy and reduce the seismic response. The oriented post-tensioned strands provide additional overturning force resistance and help to reduce residual drift. The main parameters were studied by numerical analysis to understand the complex structural behavior of this new system, such as initial stress of post-tensioning strands, yield strength of damper plates and height-width ratio of the wall panel. The static push-over analysis was conducted to investigate the failure process of the SF-SCWD. Moreover, nonlinear time history analysis of the 6-story frame was carried out, which confirmed the availability of the proposed structures in permanent drift mitigation.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.339-340
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• 2018

• Environmental Engineering Research
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• v.8 no.3
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• pp.130-140
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• 2003

• 대한방사선방어학회:학술대회논문집
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• 2010.04a
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• pp.170-171
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• 2010

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.260-261
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.1305-1306
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• 2004

• Journal of Korean Association for Spatial Structures
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• v.6 no.2 s.20
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• pp.131-136
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• 2006

It is important to evaluate energy absorption capacity of frames required during a design earthquake. An inelastic computer analysis based on mathematical modelling of energy absorbing frames and elements makes it possible to evaluate required energy absorption capacity. But such an analysis sometimes consumes much computation time particularly in case of complicated structural system. This paper presents a proposal to predict energy absorption of multi-bent steel frames by simple equivalent linear method.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.157-158
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• 2018

In this work, we developed a customized shielded cask transport system which is equipped with a railguided travelling unit and a position adjustment unit for the cask without any crane service. The designed solid model was verified to have sufficient safety margin by using structural analysis. The developed system was introduced to a hot-cell and successfully tested and verified to have required target performance.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.10a
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• pp.367-368
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• 2017