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RUSLE 방법을 이용한 만대천 유역의 토사유출량 산정
최한규,박수진,국성표 江原大學校 産業技術硏究所 2010 産業技術硏究 Vol.30 No.B
This study was intended to estimate the soil runoff at the basin of Mandaechun where the measure needs to be taken to deal with the increasing muddy water resulting from soil runoff during wet season and torrential rain at the high reaches of the Soyang lake where highland vegetables are cultivated and soil replacement for improvement is carried out every two to three years. The study was carried out in such a way of identifying the topographic factors using geographical spatial data from Water Management Information System (WAMIS) and ARC-VIEW program and estimating the soil runoff by rainfall frequency using Revised Universal Soil Loss Equation (RUSLE), and furthermore, evaluating the soil runoff contribution at the basin of Mandaechun based on estimate of the soil runoff by section.
자원 제약 조건이 공기-비용 교환 문제에 미치는 영향 분석
홍성준,류한국,유정호,이현수 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
It has been generally accepted that cost and time are in reverse proportion. But, due to the resource constraints such as resource capacity, resource availability, resource continuity and resource level, time and cost could have unfixed relation and time-cost trade-off curves could take various forms. This study proposes the labor-related constraints affecting the time-cost trade-off problems and analyzes the effects.
김성호(Seong Ho Kim),강복희(Bok Hee Kang),노상균(Sang Gyun Noh),김종국(Jong Guk Kim),이상한(Sang Han Lee),이진만(Jin Man Lee) 한국생명과학회 2008 생명과학회지 Vol.18 No.4
홍삼액의 첨가에 따른 발효가능성을 알아보기 위하여 홍삼액의 첨가량을 달리하여 발효특성을 조사하였다. 본 실험에서는 Saccharomyces cerevisiae JF-Y3을 이용하여 발효를 실시하였으며, 홍삼액(20 °brix) 함량 10~50%, yeast extract 0.5~2.5%의 범위로 중심합성계획법에 의하여 10개의 구간으로 홍삼액의 알코올 발효특성을 살펴보았다. 효모수는 홍삼액 및 yeast extract 농도 모두에 영향을 받고 있었으며, 홍삼액 농도에 더 많은 영향을 받는 것으로 나타났다. 홍삼액 농도가 감소하고, yeast extract 농도가 증가할수록 효모수가 증가하는 것으로 나타났다. 알코올 함량이 가장 높게 나타난 발효조건은 홍삼액 함량 30%, yeast extract 함량 0.50%이었으며, 이때의 최대값은 12.45%로 예측되었다. 당도 및 총당 함량의 경우 각각 1%이내의 유의수준에서 유의성이 인정되었고, 당도의 경우 홍삼액 및 yeast extract 함량 두 조건에 모두 영향을 받는 것으로 나타났으며, 총당 함량의 경우 주로 홍삼액 농도에 영향을 받는 것으로 나타났다. 홍삼액 20°brix의 함량을 10~50%까지 증가하여도 발효액의 알코올 함량이 모두 10% 이상이었으며, 전반적으로 홍삼액 첨가에 따른 발효의 저해는 크게 일어나지 않는 것으로 나타나 홍삼의 유효한 성분을 이용한 기능성 주류 개발 시 홍삼농축액을 효율적으로 활용할 수 있을 것이다. 또한, 앞으로 홍삼액 발효 시의 알코올 성분에 대한 분석, 발효액에 대한 관능적 특성, 유효성분 등에 대한 특성 변화 등을 통한 고품질 홍삼주 제조와 관련하여 추가적인 연구가 필요할 것으로 생각된다. This study focused on alcohol fermentation properties of red ginseng extracts using Saccharomyces cerevisiae JF-Y3. Central composite design was employed to investigate the influence of red ginseng extract content (10~50%, v/v) and yeast extract (0.5~2.5%, w/v) on the properties of alcohol fermentation added with red ginseng extracts. Yeast cell growth was affected both by red ginseng extract content and yeast extract content, and red ginseng extract content had a greater effect on yeast cell number than yeast extract content. Yeast cell number increased along with decrease of the red ginseng extract content and with increase of yeast extract content. Alcohol content was maximal at 30% red ginseng extracts and 0.50% yeast extract and the predicted maximum value of alcohol content was 12.45%. Brix degree and total sugar content were significant within 1% level (p<0.01), and brix degree was affected both by red ginseng extract and yeast extract content. Total sugar content was significantly affected by red ginseng content.
김성국(Seong Guk Kim),조영근(Young Kuen Cho),고창용(Chang-Yong Ko),류제청(Jeicheong Ryu),김동현(Donghyung Kim),황동현(Dong Hyung Hwang),송예은(Ye Eun Song),김한성(Han Sung Kim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
Measuring shear force is important for investigating the pathology and prevention of pressure ulcers. In this study, we introduced a bi-axial shear transducer as a new shear sensor. The sensor is consisted of aluminum and polyvinyl chloride plates placed between quadrangular aluminum plates. The shear force on the interface between the human body and a stand-up wheelchair was measured during sitting or standing movements. Shear forces on the sacrum and ischium were almost five times higher than those on other sites during experiments periods. In conclusion, the proposed shear sensor may be reliable and useful for measuring the shear force on human?machine interfaces.