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RISS 인기검색어
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- 저자 : 최유란(Choi Yu-Ran) (검색결과 5 건)
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MAS를 이용한 대규모 복합개발의 주변상권에 대한 파급효과 분석
최유란(Choi Yu-ran),이명훈(Lee Myeong-Hun),전병혜(Jun Byung-Hye) 대한국토·도시계획학회 2009 國土計劃 Vol.44 No.1
The purpose of this study is to estimate the impacts of several large-scale mixed-use developments on inner city, which form parts of the urban regeneration plan, in the sight of the level of market-share. Using MAS (Multi-agent System), it is possible to simulate the state of spatial market competition whose structure is based on Huff's model. According to the results of this study, two simultaneous developments make more inroads into surrounding markets compared to each individual development. In addition, the trading areas for pedestrian of two development sites do not mutually influence to each other, while areas for car and public transportation are merged. Moreover, the impact is more apparent in other commercial area like neighborhood markets than general commercial zone. These outcomes imply that it is necessary to consider adequate volume of commercial facilities and distance to relieve the sales decrease of existing markets.
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배양 인체피부섬유모세포에 있어서 알러지성 접촉피부염 유발제인 구리에 대한 쇠비름 추출물의 항산화 효과
오용열 ( Yong Leol Oh ),최유란 ( Yu Ran Choi ),장병수 ( Byung Soo Chang ),정인주 ( In Ju Jung ) 대한미용학회 2012 대한미용학회지 Vol.8 No.4
To elucidate the cytotoxicity and antioxidative effect of Portulaca oleracea L. (PO) extract on copper (Cu), an allergic contact dermatitis(ACD)-induced agent, cell viability were analysed by XTT assay after the treatment of cupric sulfate (CuSO4) to cultured human skin fibroblasts (Detroit 551). And also, the effects of vitamin E and PO extract on CuSO4- induced cytotoxicity were measured after Detroit 551 cells were pretreated with vitamin E or PO extract for 2 hours. In the antioxidative effects of PO extract were measured by superoxide dismutase (SOD)-like activity, the inhibitory activity of lipid peroxidation (LP) and lactate dehydrogenase (LDH) activity. In this study, CuSO4 significantly decreased cell viability in dose-dependently compared with control, and the XTT50 value was calculated at 59.8μM of CuSO4. While, vitamin E effectively prevented CuSO4-induced cytotoxicity and also, PO extract significantly increased cell viability compared with CuSO4-treated group. In the antioxidative effect, PO extract showed the inhibitory activity of LP and the decrease of LDH activity as well as SOD-like activity. From these results, it is suggested that the PO extract effectively prevented the cytotoxicity induced by an ACD-induced agent, CuSO4 via antioxidative effect. Conclusively, plant extract such as PO may be a putative resources as an alternative antioxidant for the prevention or diminution of ACD induced by allergen of heavy metals correlated with oxidative stress.
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근력강화 운동프로그램의 운동 강도 적용방법에 따른 제2형 당뇨를 동반한 뇌졸중 환자의 보행 및 균형 능력, 혈당에 미치는 영향 비교
김동규 ( Dong-gyu Kim ),최유란 ( Yu-ran Choi ),차용준 ( Yong-jun Cha ) 대한물리의학회 2018 대한물리의학회지 Vol.13 No.4
PURPOSE: Strengthening training is effective at improving the function of stroke patients. This study was conducted to compare the effects of exercise intensity on walking, balancing ability, and blood glucose in stroke patients with type 2 diabetes mellitus and to suggest more effective exercise intensity for stroke patients. METHODS: Twenty-two patients with type 2 diabetes mellitus were divided into an experimental group (n=11) and a control group (n=11). In the experimental group, a 40-70% strength of 1RM exercise program was applied for 40 minutes a day, three times a week for 4 weeks. The control group received a 50% intensity of 1RM for the same number and duration of interventions as the experimental group. RESULTS: Both the experimental group and the control group showed significant improvement in the gait function, balance ability, and blood glucose level after the intervention compared to before the intervention. In the FGA (functional gait assessment), the experimental group showed a 52.4% greater increase than the control group, and the fasting blood glucose level was 16.7% greater in the experimental group than the control group. CONCLUSION: The strengthening exercise program, which gradually increases exercise intensity, seems to be effective at improving the function of stroke patients with type 2 diabetes.
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전병혜(Jun Byung-Hye),이명훈(Lee Myeong-Hun),최유란(Choi Yu-Ran) 대한국토·도시계획학회 2008 國土計劃 Vol.43 No.7
The purpose of this study is to find out the evaluation structure of conservation value about the Han-ok residential area in Seoul. For that, it carried out an analysis as follows; ⅰ) a questionnaire on the conservation of the Han-ok residential area, ⅱ) the economical evaluation on the conservation value using Contingent Valuation Method, ⅲ) analysis of the evaluation structure on the conservation value using Structural Equation Model. As the result, first, The majority of the citizen was hoping to the conservation of the Han-ok residential. Secondly, as WTP results of the investigation by the CVM more than 70% of citizens voted to fund the conservation and it is worth 5,000~5,482won per head. Third, as SEM results about the structure on the conservation value, to increase the value of the conservation of Han-ok residence, the largest variable was the residential environment, and external image. Finally, it needs to provide information about the Han-ok residence and improve the convenience of residential environment.
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애기똥풀 추출물이 정균제인 수은의 항산화 및 멜라닌화에 미치는 영향
손영우 ( Young Woo Son ),오성균 ( Seong Kyun Oh ),최유란 ( Yu Ran Choi ),박신희 ( Shin Hee Park ),서영미 ( Young Mi Seo ),이화정 ( Hwa Jeong Lee ),정인주 ( In Ju Jung ) 대한미용학회 2013 대한미용학회지 Vol.9 No.3
To clarify the effect of Chelidonium majus (CM) extract on mercury (Hg)-induced cytotoxicity and melanogenesis, cell viability was done by XTT assay after human skin melanoma cells (SK-MEL-3) were cultured in media containing various concentrations of mercuric chloride (HgCl2). And also, the effect of vitamin E on HgCl2-induced cytotoxicity was assessed. For the protective effect of CM extract on HgCl2-induced cytotoxicity and melanogenesis, SK-MEL-3 cells were pretreated with 50 or 80 μg/mL of CM extract for 2 hours, and also, the lactate dehydrogenase (LDH) activity for antioxidative effect as well as the melanin synthesis and tyrosinase activity for the melanogenesis on CM extract were analysed. In this study, HgCl2 significantly decreased cell viability in dose-dependent way compared with control, and the XTT50 value was calculated at 29.1 μM of HgCl2. In the protective effect of vitamin E, it effectively prevented HgCl2- induced cytotoxicity by a significant increase of cell viability. In the protective effect of CM extract on HgCl2-induced cytotoxicity, CM extract significantly increased cell viability which was decreased by HgCl2-induced cytotoxicity, and also it showed the inhibitory effect of LDH activity. While, in the melanogenesis of CM extract, CM extract remarkably decreased melanin synthesis and tyrosinase activity compared with HgCl2-treated group. From these results, it suggested that HgCl2-induced cytotoxicity was involved in oxidative stress, and also, CM extract effectively prevented HgCl2- induced cytotoxicity and melanogenesis. Conclusively, plant extract such as CM may be a putative beauty resources for the prevention or diminution of the toxicity or melanogenesis induced by heavy metals correlated with oxidative stress.
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