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- 저자 : 김길주(Gil Ju Kim) (검색결과 5 건)
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전산기에 의한 Ready-Mixed Concrete의 품질관리를 위한 배합계산법
김길주,Kim, Gil-Ju 한국레미콘공업협회 1986 레미콘 Vol.3 No.-
본고는 일본「Concrete공학 」(Vol.20,No.10. Oct 1982)에 발표된 아부도산, 후등화이, 최도홍의 "전산기에 의한 레미콘의 품질관리를 위한 배합계산법"를 토대로 하여, 건설재료연구회의 "레미콘의 제조와 품질관리"를 참고로 한 것이다.
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전완(前腕)의 국부(局部) 진동(振動)이 작업자의 굴근(屈筋) 및 신근(伸筋) 피로(疲勞)에 미치는 영향
이동춘,김길주,Lee, Dong-Chun,Kim, Gil-Ju 대한인간공학회 1999 大韓人間工學會誌 Vol.18 No.1
It is very common to use the powered hand tools to enhance the productivity in various types of industry. But the use of the powered hand tools could cause health problems such as cumulative trauma disorders and vibration white fingers. In this study. the effects of hand-arm vibration and anatomical hand position on localized muscle fatigue were analyzed. Eight healthy male subjects volunteered for the study. Vibration frequencies of 0, 40, 80, 100, 150, and 200Hz and hand position of flexion and ulnar deviation were selected for the independent variables of the experiment. Median frequency shifting was used as a dependent variable. The results indicated that at the vibration frequency of 40Hz and accelation of 2g, the muscle fatigue was the greatest. For the hand position. there was significant difference between neutral and flexion. and neutral and ulnar deviation, but no difference between flexion and ulnar deviation. These results could be applied in designing powered hand tools to minimize the health problems.
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윤상혁(Yun, Sang Hyeok),박상도(Park, Sang Do),홍성학(Hong, Sung Hak),김길주(Kim, Gil Ju),이혜민(Lee, Hye Min),이창재(Lee, Chang Jae),이경혜(Lee, Kyung Hye) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Currently, each country imposes penalties on automakers through fuel economy and carbon regulation, and in North America off-cycle credit B to B transaction is possible. Ventilation seat is recognized as an indirect fuel economy improvement technology(off-cycle credit). The purpose of this development is to increase the amount of credit earned from ventilation seat. And in North America, IQS is required antifouling performance of seat covering. So we would like to develop a ventilation seat that satisfies the antifouling performance. The double raschell fabric has an advantage in terms of shape stability, so using this fabric.
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나노탄소섬유 적외선등 난방이 절화장미의 생육과 수명 및 난방비에 미치는 영향
임미영(Lim Mi Young),고충호(Chung Ho Ko),손문숙(Moon Sook Son),이상복(Sang Bok Lee),김길주(Gil Ju Kim),김병수(Byung Soo Kim),김영복(Young Bok Kim),정병룡(Byoung Ryong Jeong) (사)한국생물환경조절학회 2009 생물환경조절학회지 Vol.18 No.1
장미 생산농가의 대부분은 겨울철 난방비가 생산비의 가장 큰 몫을 차지한다. 요즘과 같은 고유가 시대에 농가의 부담을 줄이기 위하여 난방비 절감율이 높은 난방시스템에 대한 연구를 수행하였다. 복사열을 이용한 적외선등 난방의 경우 식물체와 같은 물체를 먼저 가열하여 주변의 기온이 올리는 방식으로 빠르게 온도를 높일 수 있고 경유를 이용한 난방방식에 비해 비용이 절감되는 장점이 있다. 농가에 설치된 나노탄소 섬유 적외선등 난방시스템의 현지조사를 실시하여 난방효과 및 난방비 절감율을 분석하고, 나노탄소섬유 적외선등 난방시스템과 전기히터 난방시스템에서 생산된 ‘오렌지 플레쉬’ 장미의 생육과 절화수명을 조사하였다. 나노탄소섬유 적외선등의 경우 온실 내부 공기 설정온도가 20℃인 경우 식물체 온도는 1~2℃ 정도 더 높게 나타났을 뿐만 아니라 베드와 근권부 온도는 17~19℃ 정도로 유지하는 등 우수한 난방의 효과를 알 수 있었고, 전기히터 난방시스템과 온수보일러 난방 시스템의 추정 난방비를 비교한 결과 난방비 절감 효과가 아주 높게 나타났다. 장미의 생육을 조사한 결과 전기히터 난방시템에서 생육한 장미와 차이가 없었으며 화색이나 엽색의 발현이 더 좋았다. 절회수명에서는 나노탄소섬유 적외선등에서 생육한 장미가 생체중과 수분 흡수량이 높아 다소 더 길어진 절회수명을 뒷받침해 주었다. The greatest and major cost for cut rose production during winter seasons in Korea is cost of heating the greenhouse. A study was conducted on a cost-efficient heating system to reduce expenses of cut rose growers in times of high energy prices. An infrared heating system utilizing radiant energy has an obvious advantage over other heating methods in that the energy is first used to raise temperatures of plants and other objects and subsequently that of the atmosphere, resulting in faster reaching to desired plant temperatures at a reduced heating cost. In this study the heating effect and heating cost saving of a nano-carbon fiber infrared heating system (NCFIHS) installed in cut rose greenhouses in Gimhae, Gyeongnam Province were analyzed comparatively. In addition growth, quality, and vase life of 'Orange Fresh' roses grown in greenhouses heated by NCFIHS against those grown in greenhouses heated by so called an electrical heating system. In greenhouses with a NCFIHS with a set point ail" temperature of 20℃, plant temperature was maintained at 1~2℃ higher than the air temperature, and temperatures of growing bed surface and root zone were maintained at 17~19℃ throughout cold winter nights. The cost for heating in NCFIHS was about 25 and 51 % of that of an electrical heating system and a hot water heating system heated by petroleum, respectively. Growth of roses harvested in greenhouses with a NCFIHS was similar to those grown in greenhouses with an electrical heating system. However, cut roses with more intense petal and leaf colors and a longer vase life (fresh weight and amount of water uptake) were harvested in greenhouses with a NCFIHS as compared to those harvested in greenhouses with an electrical heating system.
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