• Transportation Technology and Policy
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• v.10 no.4
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• pp.14-20
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• 2013

• Phonetics and Speech Sciences
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• v.5 no.1
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• pp.73-80
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• 2013

Formant is one of the essential vocal features for research of voice production, recognition and synthesis. Numerous studies were established on foreign languages including English vowels. However, studies related to Korean were done with a limited number of voice data. In this study, we compare four formants according to age and gender using a large number of Korean monophthongs. A total of 2614 Korean speakers participated in our experiments. We summarize statistical results by mean and standard deviation for each formant of five monophthongs. The results show a notable difference in each age and gender group. A quantitative study based on a large dataset is suggested for future studies on Korean speech sounds.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.04a
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• pp.213-215
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• 2008

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.222-223
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• 2006

In this paper, the design of power supply for high power magnetron system is studied. For magnetron drive, three kinds of power supply is required for main high voltage, magnet and heating filament. Detail design was accomplished with basic simulation and real system is developing based on basic design.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.224-225
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• 2006

In this paper, the design of Power supply for high power magnetron system is stuied. For magnetron drive, three kinds of power supply is required for main high voltage, magnet and heating filament. Detail design was accomplished with basic simulation and real system is developing based on basic design.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.10 no.2
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• pp.107-112
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• 2005

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.675-677
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• 2009

• Proceedings of the Korean Society of Community Living Science Conference
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• 2011.10a
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• pp.85-85
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• 2011

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2006.10a
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• pp.89-91
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• 2006

• Proceedings of the KIEE Conference
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• 2001.04a
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• pp.353-356
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• 2001

This paper describes an analysis of electromagnetic system of Magnetic Switch using 3D and 2D finite element method. The electromagnetic blowout force acting on the arc is obtained by 3D finite element method. So, we are researching the arc chamber for dc current using permanent magnet.