• The International Journal of Costume Culture
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• 제3권2호
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• pp.100-123
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• 2000

The purpose of this research was to understand changes in Korean shrouds and to enhance practical usage of them by examing the items and shapes of Korean shrouds classified into two categories, traditional and current. We first examined the history of shrouds and funeral ceremonies from the prehistoric age to the Chos o n dynasty, and second, examined the items and shapes of traditional and current shrouds. As for the items, no big changes were recognized though there had been some changes in the way of using Keum(衾), Po(袍), and Kwadu(裏　). Overall, the items had becamesomewhat simplified The traditional shapes of shrouds are relatively well-maintained despite some changes in current shrouds Aksu, Yeomo(女帽), etc, which had been made easier to put on.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.380-387
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• 2000

In this paper, a successful result of modification of an axial flow fan and a shroud for noise reduction of a window type air conditioner is presented especially in order to verify the importance of blade shape improvement and the searching for the optimal shape of shrouds. Effective ways to work out the result as mentioned above are to make the tip of the blade varied in thickness and to have special shapes. From the viewpoint of the shape in a shroud, several cases were examined and the particular value of a design parameter of the shroud was acquired to get the best noise reduction of an air conditioner. Through the application of the methods, the air conditioner became less noisy by 4.5 dB(A) in terms of air-borne noise produced only by the axial flow fan and consumed less energy by 20.9% compared to the current one.