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정해원,강훈,조성준,Jeong, Hae-Won,Gang, Hun,Jo, Seong-Jun 한국전자통신연구원 1997 전자통신동향분석 Vol.12 No.5
본 논문은 '96년 6월부터 ATM Forum에서 표준화가 진행되고 있는 무선 ATM에 대한 각 계층의 역할과 앞으로의 추진 방향 등에 대한 요약이다. 또한 표준화 작업을 위하여 기고된 기술 문서와 현재 국책사업으로 연구 개발 중인 ATM LAN을 토대로 하여 5 GHz 주파수대에서 25 Mbps 전송 속도로 운용되는 무선 ATM LAN에 대한 설계 예를 제시한다.
정해원 ( Hae Won Chung ),김효정 ( Hyo Jeong Kim ) 한국의류산업학회 2012 한국의류산업학회지 Vol.14 No.3
Cocoa is a popular drink for children and contains healthy polyphenols however; a deep brown stain is left when cocoa is spilled over clothes. The main pigments in cocoa are anthocyanins that change in washing solutions with different alkalinity and metals. The removal and color changes in a cocoa stain after washing with various pH solutions and water hardness were studied. Alkalinity and the water hardness of washing solutions were important factors for the removal of cocoa stains. The removal of cocoa things in washing solutions without detergent was low (and even became negative after removal and darker) in solutions with a pH 9 and above. The cocoa stain was not removed and only the fabric color faded, although the cocoa stained cloth was washed with Korea tap water that has a pH of 7. The cocoa stain removal in detergent solutions was conspicuously higher than for only water. Even in detergent solutions, the cocoa stain removal decreased as water hardness increased. Cocoa stain removal was more effective and the color dimmest when the stained cloth was washed in a solution without the metal cations, and the bleach added with the detergent at a temperature of 40˚C and for longer than 20 minutes. Effective and economical equipment for tap water softening for a washing machine should be developed and used to improve cocoa stain removal.