• Journal of Drive and Control
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• v.17 no.1
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• pp.68-75
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• 2020

• Journal of Advanced Research in Ocean Engineering
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• v.3 no.4
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• pp.204-204
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• 2017

• Journal of Drive and Control
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• v.9 no.1
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• pp.77-82
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• 2012

• Journal of Drive and Control
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• v.8 no.1
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• pp.40-43
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• 2011

• Journal of Drive and Control
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• v.8 no.1
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• pp.44-49
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• 2011

• Journal of the Korean institute of surface engineering
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• v.21 no.3
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• pp.114-129
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• 1988

The principles of the physical vapour deposition processes(PVC); evaporation, sputting, and ion plating are presented and compared with each other with respect to coating properties, deposition rate and process control. The significance of coating sources and vacuum equipment for hard materials coating is discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2249-2253
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• 2011

This paper analyzed the problems of the Korean output regulation in the relevant band through an analytic comparison of the current trend of each country and their standard values concerning the technical standard of low power u-IT equipments. In connection with the standard value of technical values of each country, which has been proposed in the registration of the appropriate electric wave, the paper aims to propose the standard value that could actually be introduced for suitable low power u-IT installations in Korea. Provided that the Korean standard may be upgraded based on the tolerances of technical standards proposed in this paper, this is expected to be committed to the distribution and advancement of low power u-IT equipments; and further, it is anticipated to be prepared with competitiveness not only in the Korean communications market, but also in the international communications market.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.5716-5720
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• 2012

To expand the use of three dimensional(3D) product modelling in the army, we have analyzed military technical data management system, as well as the military guidelines for the unique format and content of technical data package. Because traditional munition sector is based on the machinery and equipment industry, they have usually applied two dimensional(2D) drawings to prepare a design and to make a product. For that reason, there is no provision for 3D product modelling as a technical data package in the military guideline. In this study, we proposed an improvement scheme for the vitalization of 3D product modelling in the army not only in terms of related guideline but also military technical data management system.

• Korean Journal of Human Ecology
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• v.10 no.2
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• pp.5-18
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• 2007

The purpose of this study was to examine middle school students' three behavioral systemic needs for the Housing chapter in Home Economics curriculum, Through literature review, the concepts of the three behavioral systems in this study were divided into technical, interpretive and emancipatory one. The questionnaire survey method was used, The subjects were selected randomly the third grade 259 students at 6 middle schools located in Jeonju city, from December 17, 2004 to January 17, 2005, Data were analyzed by using SPSS/WIN 11.5 program. The results were as follows; 1) Average of importance which middle school students recognized was showed the interpretive behavioral system> the emancipatory behavioral system> the technical behavioral system, That of reflection of the text book was showed that the technical was same with the interpretive, and the emancipatory was a little lower value than two systems, And needs in each system were the emancipatory behavioral system> the technical behavioral system> the interpretive behavioral system, 2) Average needs were showed according to the sub-chapter of housing. 'Preservation and Repair of house' in the technical behavioral system and 'Indoor Environment and Equipment' in the interpretive and the emancipatory behavioral systems.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.527-532
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• 2014

Generator is the main equipment of a power plant that generates electric power. The line frequency is 60Hz, since that is operated at 3600rpm in fossil power plant. Therefore, the specific frequency 120Hz by the electromagnetic excitation force is generated inherently. If the looseness of stator at generator happens, abnormal sound that has 120Hz and the harmonic frequency is emitted from generator frame. In that case, binding of end-winding or re-wedging is needed for the reduction of sound level. In case of severe level of sound, belly band can be additionally installed at core. In this paper, the characteristics of generator sound is described and modal data is analyzed after installation of belly band.