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양윤선(Yang Yun-Sun),박종현(Park Jong-Hyun),이찬식(Lee Chan-Sik) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.10
Construction accidents occupy 21.13 percent of total industry accidents and 26.18 percent (the highest fatalities rate) of total deaths by disaster. The number of construction accidents rises every year according to the accident reports of 2007. Previous studies of assessing risks have almost exclusively focused on the probability component. To reduce disasters and successfully accomplish a construction project, it is quite often necessary to take out a disaster trade considering risk probability component as well as a severity component. In this study, 12,439 cases of accidents were investigated using the risk plane and the index of relative risk methods according to the accident reports from 2005 to 2007. According to data, painters have the highest risk score of all trades, followed by watertighters, brickmasons, blockmasons, and stonemasons, electricians, and welders. The lowest risk score trade is observed for common labor. It is expected that the information derived from research data presented in this paper could be applied to reduce the number of disasters by selecting fundamental data which is necessary for the safe planning of construction sites and the important management of trades.
양윤선(Yang Yun-Sun),채경석(Chai Kyung-Suk),정인수(Jung In-Su),이찬식(Lee Chan-Sik) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
The recently increased proportion of the deteriorated apartments makes housing problems. The need for remodeling is increasing as one of the solutions. This study aims to develop the remodeling elements which are guide lines for remodeling of the apartment and to provide fundamental data for further study of remodeling. Through the previous studies, remodeling elements have been drawn. These elements were classified into superordinate items through factor analysis. As a result, subordinate items were classified under twenty-three heads and superordinate were classified under five heads; enlargement of area, expansion of facility, improvement in convenience, improvement in space configuration, improvement in appearance. As a result of this study, these items are expected to provide basic guidelines for selecting remodeling elements. In future study, it is necessary for remodeling elements to be systematized for resident's properties.
양선임(Yang, Sun-Im),김혜진(Kim, Hye-Jin),양윤선(Yang, Yun-Sun),오병석(Oh, Byung-Seok),김동청(Kim, Dong-Chung) 한국외식산업경영학회 2014 외식산업경영연구 Vol.10 No.1
커피원두와 커피박 추출물의 항산화 활성을 비교하였다. 커피원두와 커피박 추출물의 페놀성화합물 함량은 각각 17.3μg/mg과 20.1μg/mg으로 나타났다. 환원력의 EC50은 커피원두와 커피박 추출물에서 각각 11.50μg/ml과 10.80μg/ml이었고, 유리라디칼 소거능의 EC50은 커피원두와 커피박 추출물에서 각각 14.16μg/ml과 14.12μg/ml로 나타났다. 커피원두와 커피박 추출물의 농도를 증가시킬수록 환원력과 유리라디칼 소거능도 비례하여 증가하였다. 따라서 커피박 추출물은 커피원두 추출물에 뒤지지 않는 우수한 항산화 활성을 보유하고 있었다. In this study, antioxdative ability between coffee bean and coffee waste extracts was compared. Total phenolic contents of coffee bean and coffee waste extracts were 17.3 μg/mg and 20.1 μg/mg, respectively. EC50 values of coffee bean and coffee waste extracts for reducing power were 11.50 μg/ml and 10.80 μg/ml, respectively. Also, their EC50 values for free radical scavenging activity were 14.16 μg/ml and 14.12 μg/ml, respectively. Their reducing power and free radical scavenging activity increased as their concentration increased. Thus, coffee waste extract possessed a potent antioxidative potential.
동물 이용 연구에 대한 법적 고찰 : 바이오장기연구를 중심으로
정규원 ( Kyu Won Jung ),양윤선 ( Yun Sun Yang ) 한양대학교 법학연구소 2009 법학논총 Vol.26 No.2
Many biomedical researches use animals as subjects. However, some argue that researches which use animals should be banned because animals are morally as valuable as human beings. There are two issues related to the biomedical researches which use animals. First, whether the use of animals in biomedical researches is necessary. Some argue that it is not necessary or even harmful, but history shows that using animals in biomedical researches is very useful. The second issue is moral issue, that is whether the use of animals in biomedical researches is morally justified. The most persuasive argument that animals are morally equal to human beings is based on the opinion that animals also feel pain. Although we can agree that animals feel pain, that is not enough to agree the argument that animals and human beings have the same moral value. In 2008, <Laboratory Animal Act> is enacted. This Act focuses on the appropriate management of laboratory animals and animal experimentation. However, there are many overlaps between <Laboratory Animal Act> and <Animal Protection Act>. These Acts should be revised to regulate using animals by human beings properly. Xenotransplantation research should use animals in nature. There are some differences between ordinary animal experimentations and xenotransplantation research. First, animals are given births in xenotransplantation research. Second biological materials which are originated from animals are transplanted onto human bodies. When we examine the ethical, legal issues of animal experimentation in xenotransplantation, we should consider these propertied.
진혜진(Hye Jin Jin),최수진(Soo Jin Choi),배윤경(Yun Kyung Bae),이수연(Soo Yeun Lee),길명옥(Myeong Og Gil),박찬미(Chan Mi Park),왕준호(Joon Ho Wang),오원일(Wonil Oh),양윤선(Yoon Sun Yang),조인호(Inho Jo),김철기(Cheol-Ki Kim),송해룡(Hae-R 대한정형외과학회 2007 대한정형외과학회지 Vol.42 No.6
목적: 인간 골수로부터 간엽줄기세포를 분리 배양하여 기증자의 나이에 따른 분화능력을 비교하였다. 대상 및 방법: 저연령 그룹 (n=16, 12.5±5.8세)와 고연령 그룹 (n=4, 48.5±7.2세)으로 나눠 총 20명의 환자로부터 동의를 얻어 골수를 채취하였고, 채취한 골수로부터 간엽줄기세포를 추출하였으며, 세포 형태와 면역표현형을 분석하였다. 또한, 세포의 노화를 두 그룹에서 계대 배양하여 측정하였다. 골, 연골, 지방세포로의 분화를 관찰하기 위해 역전사 중합효소연쇄반응을 수행하였으며, alkaline phosphatase, von Kossa, safranin O와 oil red O 염색을 시행하였다. 결과: 총 20명의 골수에서 모두 간엽줄기세포를 추출하였고, 저연령 그룹에서 획득한 간엽줄기세포의 수가 고연령 그룹에 비해 약 5배 많았다. 세포의 노화는 두 그룹 모두 10세대 이후에서 나타났으며, 면역표현형도 두 그룹에서 유사한 형태를 보였다. 골, 연골, 지방세포로의 다양한 분화능력을 보였으며, 두 그룹간의 차이는 없었다. 결론: 본 연구의 결과는 골수 기증자의 나이는 골수 간엽줄기세포의 분화능력에 영향을 주지 않음을 보여 주었다. Purpose: The aim of study was to compare the differentiation capacity of mesenchymal stem cells (MSCs) obtained from human bone marrow (BM) according to the age of the donors. Materials and Methods: MSCs were isolated from the BM of young (n=16, 12.5±5.8 years) and elder (n=4, 48.5±7.2 years) patients with the consent of them. We analyzed the cell morphology and the cell surface markers of the MSCs. In addition, we assessed the cell senescence with serial cultures from both age groups. Cell pluripotentiality was analyzed by osteogenic, chondrogenic, and adipogenic induction media. We performed RT-PCR, a measurement of expression of alkaline phosphatase, and staining with von Kossa, safranin O, and oil red O stain. Results: All of the MSC samples tested, irrespective of the age of the donors, MSCs were all successfully isolated from twenty bone marrows. However, the number of cells of from the young donors was five times greater than that of the elderly donors. Senescence was observed over 10 passages in both age groups. The immunophenotypes of both age groups showed similar patterns. MSCs obtained from young and older donors showed the potential to differentiate into osteogenic, chondrogenic, and adipogenic lineages with no difference for both age groups. Conclusion: Our study supports that age does not influence the pluripotential capacity of human BM derived MSCs.