• The Journal of Natural Sciences
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• v.9 no.1
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• pp.169-175
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• 1997

In this study, it was investigated about dyeability, light-fastness, wash-fastness and tensile strength in PET fiber using the effective carrier solvent such as benzyl alcohol, benzaldehyde and acetophenone. As a results, dyeability in mixed solvent was better than that of single solvent. And dyeability in mixed solvents of benzyl aldehyde and acetophenone was of them. But effective carrier action was resulted in decrease of properties such as light-fastness and tensile strength of PET fiber after dyeing.

• Proceedings of the Korea Contents Association Conference
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• 2004.05a
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• pp.461-466
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• 2004

Recently, the underground parking spaces in apartments have been constructed owing to lack of parking spaces in spite of their various environmental problems derived from the fact they are under ground. This study describes the daylighting performance evaluation of underground parking spaces throughout a set of scale model measurement. As a result, in the design of top light system, uncovered open ratio of 4% should be recommended to provide sufficient amount of natural light for the standard light level.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.571-573
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• 2001

대부분 영상검지기는 입력영상 전체영역의 밝기값에 기반하여 카메라가 받아들이는 광량을조절하는 자동 아이리스 방법을 채택하고 있다. 대형차량의 출현, 갑작스런 외부 일광의 변화가 있을 때 영상내 밝기값이 급격히 변할 수 있는데 기존 방법의 경우 기계적인 대응으로 인한 지연 때문에 차량을 미탐지하는 오류가 발생할 수 있다. 본 논문에서는 이러한 문제점을 해결하기 위해 사용자 제어 아이리스(UCI: User-Controlled Iris) 방법을 제안한다. 사용자 제어 아이리스를 사용할 경우 배경영상의 밝기값 변화에만 반응함으로써 움직이는 물체의 밝기값 또는 외부 일광이 급변하는 상황하에서도 양질의 입력영상을 얻을 수 있어 견고한 차량 탐지가 가능하다.

• Journal of the Korean Society of Clothing and Textiles
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• v.28 no.3_4
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• pp.414-421
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• 2004

To reduce farmer's stress from solar radiation and ultraviolet radiation(UV), the sunshade hat with a large brim and special structure for ventilation was developed and tested with manikin heads outdoors at previous study(Kim and Choi, 2002). To evaluate the protection efficiency of the sunshade hat, human trial test was performed at outdoors. The results were as follows; Skin temperatures(7 sites), heart rate, temperature inside the hats, temperature and relative humidity inside clothing on the back in wearing developed sunshade hat were significantly lower than those in wearing the controlled hat. In subjective sensation, subjects answered to feel significantly hotter, more humid and more uncomfortable in wearing the controlled hat. But relative humidity inside the hats was significantly higher in wearing developed hat. In rectal temperature, there were no significant differences between two hats.

• Journal of the Korean Home Economics Association
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• v.42 no.1
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• pp.99-113
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• 2004

To protect farmers from solar radiation and UV, the movable sunshade tent was designed and its protection efficiency was measured in the artificial chamber and outdoors. Sunshade tent and the existing farmer's hat were examined. The results were as followes； Heart rate, total body weight loss and temperature of clothing microclimate on the chest and the back were lower in using sunshade tent than those in wearing existing hat in two experiments. In subjective sensation, subjects answered to feel significantly hotter and more uncomfortable in wearing existing hat in two experiments. Rectal temperature was significantly lower using the sunshade hat in experiment at outdoors(p<0.001).

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.8
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• pp.1177-1185
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• 2002

This study was to develop the sunshade hat which reduced stress from solar radiation and ultraviolet radiation (UV), in order to keep the farmer's health and to promote their work efficiency. The new sunshade hat with a large brim, special structure for ventilation, stability and portability was designed and tested with manikin heads outdoors. Two newly designed sunshade hats(A, B) and three existing hat were tested Sunshade hat A made of double fabric with aluminum coating-nylon and black cotton cloth with a polyester mix(T/C) was the most protective from solar radiation. Sunshade hat B with larger brim was the most protective from ultraviolet radiation, even though it was made of aluminum coating-nylon single fabric.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.10a
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• pp.572-573
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• 2010

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2006.11a
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• pp.143-145
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• 2006

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2006.11a
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• pp.128-130
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• 2006

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.616-617
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• 2010