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만성신부전 환자의 혈액투석 및 복막투석에 따른 피부 변화에 대한 고찰
최승일 ( Seung Il Choi ),이종석 ( Jong Suk Lee ),이성열 ( Sung Yul Lee ),이은영 ( Eun Young Lee ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.10
Background: End-stage renal disease (ESRD) is accompanied by various skin manifestations, and recently, the survival time of patients is increasing owing to the development of dialysis treatment, and skin manifestations are on the rise. Objective: The objective of this study is to investigate the differences in skin changes, according to the dialysis method and period in ESRD patients, and to verify whether a correlation exists between the factors that affect pruritus. Methods: Various kinds of skin manifestations were identified by examining and asking 80 outpatients detailed questions and the difference was examined by classifying them into groups, according to the dialysis method and period. Results: The most common symptoms were xerosis (91%) and pruritus (85%). The study showed that most symptoms occurred more frequently in the peritoneal dialysis group than the hemodialysis, and among these, the change of sweating had a significant difference (p=0.043). As the dialysis period got longer, skin manifestation generally showed a higher frequency, and the particular bleeding tendencies and nail abnormalities showed an obvious difference. Results considering the relation of severity of pruritus and xerosis with the dialysis method and period showed a significant increase only in pruritus, according to the dialysis period (p=0.003). Conclusion: Skin changes showed a high frequency in peritoneal dialysis, but it didn`t show a significant difference. Bleeding tendencies, changes of sweating, and nail abnormalities, according to the dialysis period, showed a significant difference. Factors causing pruritus were more related with xerosis than blood levels showing a renal function. (Korean J Dermatol 2012;50(10):845∼854)
최승일 ( Seung-il Choi ),김진호 ( Jin-ho Kim ),황인극 ( In-keuk Hwang ) 대한설비관리학회 2016 대한설비관리학회지 Vol.21 No.4
Trends in power costs by energy source and causes for these changes are investigated. Levelized Costs of Electricity(LCOE) are used as power costs. According to International Energy Agency(IEA) report, LCOE`s of base power increased a little in 2015 compared to 2010, whereas LCOE`s of renewable power decreased due to technical advancements. In particular, onshore wind power has reached a level that is not a big difference to base power in costs. LCOE`s of domestic power plants are analyzed according to load factors. At higher discount rates levelised fixed costs increase and so do LCOE`s. Despite of high fuel cost, Combined Cycle Gas Turbines(CCGT) turn out to be economic in case of low load factors. Prices of emission trading are used to reflect carbon costs of reducing greenhouse gas emission and effects of social costs of nuclear power, emerged after the Fukushima nuclear accident, are taken into account. Construction costs of nuclear power plants are likely to increase due to higher safety standards and so are back-end costs of nuclear fuel cycle and decommissioning costs. And coal power plants will have higher costs due to emission of environmental pollution. These changes of power costs will have impacts on energy policies and energy mix planning.
인터넷쇼핑몰의 특성이 고객충성도에 미치는 영향에 관한 연구
최승일(Choi Seung-Il) 한국콘텐츠학회 2005 한국콘텐츠학회 종합학술대회 논문집 Vol.3 No.1
본 연구에서는 최근 급격한 성장을 보이고 있는 기업과 소비자간의 거래 형태를 연구 대상으로 하고 있으며, 기업들의 인터넷 쇼핑몰에서의 특성요인을 제품의 특성요인, 시스템 특성요인, 고객과 쇼핑몰의 상호작용 특성요인으로 각각 구분하여 구분된 특성요인들이 고객 충성도에 어떠한 영향을 마치는 지를 살펴보고자 한다. The object of this study is the business form between the consumer and the enterprise having a rapid growth nowadays. We classified enterprises' characteristic factors in internet shopping mall into product's characteristic factors on shopping mall, characteristic factors of the system on shopping mall and characteristic factors of the interaction between customers and shopping mall in the internet shopping mall. And then we investigated how these classified characteristic factors on shopping mall could influence on customer loyalty.
해외관광상품의 서비스품질이 고객만족, 재 구매의도에 미치는 영향에 관한 연구
최승일(Choi, Seung-Il),김동일(Kim, Dong-Il) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.8
해외 관광 상품의 개발과 촉진은 민간 외교부문과 국가이미지 제고뿐만 아니라 경제적인 측면에서도 중요한 변수이다. 또한 해외 관광 상품은 국내 관광산업의 활성화와 외국인의 국내 방문에도 긍정적인 효과를 줄 수 있다. 그러므로 여행 산업의 개발과 촉진은 특정국가의 경쟁력과 발전 기회를 제공하며, 다른 산업의 투자유치에도 영향을 준다. 따라서 본 연구에서는 이러한 해외 관광 상품의 서비스품질이 고객만족과 재 구매 의도에 미치는 영향을 분석 하고, 향후 관광산업의 경쟁력 강화요인을 검증 하였다. 연구분석 결과에서는 서비스품질의 유형성, 확신성, 공감성은 고객만족에 영향을 미치는 것으로 나타났으며, 신뢰성과 반응성은 고객만족에 별 다른 영향을 미치지 못하는 것으로 나타났다. 본 연구는 향후 관광산업의 특성을 분석하거나, 해외 관광 상품의 주요 성공요인이 될 수 있는 변수를 개 발하는데 지침을 제공할 수 있을 것이다. Development and promotion of foreign tourism products is an important factor for economical side as well as to improving the foreign relation and the image of nation. Also, foreign tourism products can give a positive effect in activation of the domestic tourism industry and foreigner's domestic visit. Thus, development and promotion of travel industry may offer competitive power of the specification country and a development opportunity, and influence in investment infancy of different industry. Therefore, in this study, service quality of this foreign tourism products analyze effect about customer satisfaction and re-purchase intention, investigated competitive power factors of the tourism industry in the future. In the final study, service quality patten, confidence, attraction could be influenced on customer satisfaction, reliability and responsiveness was not affected by the other factors. This study may suggest guideline that analyze the special character factors of the tourism industry future, or develop the critical success factor of foreign tourism products.