• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.06a
• /
• pp.223-223
• /
• 2002

• Proceedings of the Korean Vacuum Society Conference
• /
• 2003.02a
• /
• pp.207-207
• /
• 2003

• Proceedings of the Korean Vacuum Society Conference
• /
• 2003.08a
• /
• pp.199-199
• /
• 2003

• Proceedings of the Korean Vacuum Society Conference
• /
• 2003.08a
• /
• pp.211-211
• /
• 2003

• Proceedings of the Korean Vacuum Society Conference
• /
• 2004.08a
• /
• pp.221-222
• /
• 2004

• Proceedings of the Korean Vacuum Society Conference
• /
• 2004.08a
• /
• pp.183-183
• /
• 2004

• Journal of Astronomy and Space Sciences
• /
• v.9 no.1
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• pp.97-110
• /
• 1992

Observed spectra of the long period eclipsing binary VV Cephei show emission features of Balmer and some ionized metal lines. These features were interpreted as the result of the extended envelope activity surrounding the secondary star. Radial velocities and equivalent widths were calculated from some metal lines.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.02a
• /
• pp.187-187
• /
• 2002

• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.06a
• /
• pp.197-197
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• 2002

• Journal of Korean Society for Atmospheric Environment
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• v.19 no.5
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• pp.541-549
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• 2003

A basic experimental study was conducted in order to find the optimum combustion control technology to decrease the thermal NO$_{x}$, by applying the catalytic combustion method with natural gas. NO$_{x}$ emission increased with increasing space velocity due to temperature rising in the furnace. In order to overcome the low resistance to high temperature, secondary air was supplied to the CST combustor. The following secondary fuel formed combustible mixture in part, which resulted in steep increase of the exiting temperature of the 2nd catalyst bed. It led to the more generator of NO$_{x}$, 30∼60% of the 1 st catalyst bed. It might be due to the potential increase of thermal NO$_{x}$.