• Journal of Korea Foundry Society
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• v.27 no.7
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• pp.62-69
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• 2007

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2003.10a
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• pp.64-64
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• 2003

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.1216-1217
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• 2006

We investigated on the additive effect of carbon nanotube in the sulfur electrode on the first discharge curve and cycling property of lithium/sulfur cell. The sulfur electrode with carbon nanotube had two discharge plateau potentials and the first discharge capacity about 1200 mAh/g sulfur. The addition carbon nanotube into the sulfur electrode did not affect the first discharge behavior, but improved the cycling property of lithium/sulfur cell. The optimum content of carbon nanotube was 6 wt% of sulfur electrode

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.961.2-961.2
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• 2006

• Proceedings of the Membrane Society of Korea Conference
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• 2005.11a
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• pp.51-59
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• 2005

• International Journal of Aerospace System Engineering
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• v.1 no.1
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• pp.29-33
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• 2014

A displacement measurement system that uses fiber-optical common-path interferometry has been developed. The system includes fiber-optic devices and a collimator attached to a linear translation stage. The interferometry effect was detected with a photodetector whose signal was measured on an oscilloscope. Experiments showed that vibration of the stage disturbed the signal by causing nanoscale interference. Under stable conditions, the measured distance was the almost the same as the value calculated from the linear translation stage parameters.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2007.11a
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• pp.338-343
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• 2007

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2004.11a
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• pp.48-48
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• 2004

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2004.11a
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• pp.49-49
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• 2004

• KSBB Journal
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• v.29 no.3
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• pp.183-187
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• 2014

Sick-building syndrome occurs when indoor air is polluted with harmful volatile organic compounds such as formaldehyde which are contained in furniture or new building materials. In this study, formaldehyde-shielding chitosangel sheet was developed and its performance was evaluated. Chitosan and agar were dissolved in acetic acid solution. The optimal concentrations of chitosan, acetic acid and agar were 3, 3, and 2.5 %(w/w). Formaldehyde was spreaded on gypsum board and then wall paper was attached on it by using glue. When chitosan-gel sheet was attached on this control board, the amount of formaldehyde released from the board was decreased by 63% than in control board. On the other hand, decrease in formaldehyde releasing was only 32% when liquid solution of chitosan was spreaded on the control board. This result clearly indicates that chitosan-gel sheet removes formaldehyde more effectively than liqud solution of chitosan. Furthermore, this type of sheet is more applicable to new building than spraying type.