• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.315-315
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• 2004

자기베어링 시스템은 액츄에이터, 센서, 제어기, 전류앰프 등으로 구성되어 있으며 시스템의 신뢰도는 각 구성 요소의 신뢰도와 구성요소의 상호 작용에 의해 결정된다. 자기 베어링 기술이 현재 보다 많은 분야에 적용되기 위해서는 신뢰도의 향상이 필수적이다. 본 논문에서는 자기베어링에서 사용되는 센서 중 일부가 작동하지 않더라도 시스템이 정상적으로 작동하는 센서 고장 허용 자기 베어링 시스템을 기술하였다.(중략)

• 전기의세계
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• v.23 no.6
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• pp.56-59
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• 1974

It is well-known that the anode circuit of SCR has the current controlled negative resistance characteristic. Recently the present auther has shown that the gate circuit of SCR has the voltage controlled negative resistance characteristic for the constant anode voltage. It is shown of the equivalent model to SCR(when conducting) the voltage controlled negative resistance characteristic for gate circuit. And it is possible to make SCR gate oscillators with their desired characteristic for illustration.

• Proceedings of the Korea Concrete Institute Conference
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• 1996.10a
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• pp.321-327
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• 1996

The result of an experimental study on the mechanical properties of different types of polypropylene fiber reinforced concrete are presented in this paper. This study has been performed to obtain the properties of PFRC such as slump, Vee-Bee time, compressive strength, tensile strength, flexural strength, toughness and resistance to impact. The test variables are fiber content, fiber types, fiber length and W/C ratio. Polypropylene fibers were effective in reinforcing the matrix. A remarkable increase in toughness was observed by the addition of polypropylene fibers.

• Proceedings of the Korea Concrete Institute Conference
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• 1997.04a
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• pp.365-372
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• 1997

This study is aimed for manufacturing a High performance Concrete(HPC) Pile as using steel fibers, investigation the mechanical properties of HPC Pile and proposition the potential application. At this study. We found that mechanical properties(cracking moment and fracture moment) of Pretensioned spun High strength Concrete (PHC) Pile using steel fibers is much superior to without steel fibers. Therefore. we think that using steel fibers in Concrete Pile is to progress flexural strength energy absorption capacity and post-cracking resistance.

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.124.2-124
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• 2002

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.10a
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• pp.149-152
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• 2008

The purpose of this study is to develop a control software for daylight responsive dimming systems and automated roller shading systems. Developed software in this study is to used determinate sky conditions, calculation of solar profile angle, control height of roller shade, calculation of dimming level(%) for daylight responsive dimming systems.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.11a
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• pp.655-658
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• 2004

This study was performed to verify the possibility of the integrity estimation of the bridge substructure focusing on the dynamic property change of concrete pier with penetration depths using experimental modal analysis. As a result of the impact vibration test, it is found that scour reduces the stiffness of the foundation, and measurement the accelerance residue and natural frequency can be used for the estimation of the integrity index.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.05a
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• pp.195-199
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• 2004

The most important role of photosensor is to measure on exact workplan illuminance of room when daylight responsive dimming systems are used. The shape of most optimal photosensor must be able to measure exact luminous flux without changing setting position corresponding to the change of room situations. That is, shape and positioning of optimal photosensor should be corresponded to the optimal luminous flux measurement.

• 한국연소학회:학술대회논문집
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• 2015.12a
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• pp.99-102
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• 2015

To operate coal fired power plant efficiently is considered unburned carbon as important factor. But, unburned carbon contents change does not have an impact on Boiler performance simultaneously. we evaluated that unburned carbon contents change had an little influence on unburned carbon loss change for performance side at a real power plant.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.180-183
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• 2006

The recognition of emotionality becomes so important that it is called 'emotional consumption society'. The emotional design, which is mostly concerned about users consensus and experiences, is understood from a interactive point of view, human, and space. Today, the emotional design is a new paradigm. From this point of view, this paper, which presents patterns analysis of outdoor lighting by the emotional design, applies expression techniques of the emotional design in Analysis process of outdoor lighting patterns. Also, this paper shows examples at analysis process.