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PSP를 이용한 15<sup>°</sup> 반와류 홀과 30-7-7 팬형상 홀의 막냉각 효율 비교 연구
김예지,박순상,이동호,곽재수,Kim, Ye Jee,Park, Soon Sang,Rhee, Dong Ho,Kwak, Jae Su 한국유체기계학회 2016 한국유체기계학회 논문집 Vol.19 No.4
The various film cooling hole shapes have been proposed for effective external cooling of gas turbine blade. In this study, the film cooling effectiveness by three different hole shapes (cylindrical hole, $15^{\circ}$ angle anti-vortex hole, 30-7-7 fan-shaped hole) were examined experimentally. Pressure Sensitive Paint (PSP) technique was used to measure the film cooling effectiveness. The coolant to mainstream density ratio was 1.0 and three blowing ratios of 0.5, 1.0, and 2.0 were considered. Results clearly showed that the effect of hole shape on the distribution of film cooling effectiveness. For the cylindrical hole case, the film cooling effectiveness decreased remarkably as the blowing ratio increased due to the jet lift off. Because of large hole exit area and low coolant momentum, the 30-7-7 fan-shaped hole case showed the highest film cooling effectiveness at all blowing ratio, followed by the anti-vortex hole case.
김예지(Kim, Ye Jee),구지영(Koo, Ji Young),이재희(Lee, Jae Hee),이민정(Lee, Min Jung),김승인(Kim, Seung In) 한국디지털디자인협의회 2015 디지털디자인학연구 Vol.15 No.1
캠핑 문화가 크게 확산되고 있는 가운데, 서울시가 운영하는 캠핑장 또한 큰 호응을 얻고 있다. 주말은 이용객들이 많아 예약이 힘들 정도로 포화상태를 이루지만, 평일은 실적이 저조한 상황이다. 이에 본 연구는 한강시민공원 난지캠핑장을 중심으로 평일 이용 활성화 방안을 연구하고자 한다. 본 연구는 더블 다이아몬드 서비스 프로세스를 활용하여 진행하였다. 현장답사를 통한 난지캠핑장 시설 및 이용현황 분석을 바탕으로 오락요인이 부족함을 알 수 있었다. 더블 다이아몬드 서비스 모델을 활용하여 저예산영화, 인디밴드공연, 프리마켓, 셔틀버스 4개의 키워드를 추출하였다. 이를 토대로 이용 활성화 방안으로 문화예술 중심의 새로운 문화공간에 대한 구역별 방안을 제시하였다. 접근성이 좋은 자유 이용 공간은 프리마켓과 아웃도어 키친으로, 전기 시설이 구비된 자가 텐트 구역은 공연 존으로, 편의 시설 접근이 우수한 몽골 텐트 구역은 캠핑 존으로, 실내 활동이 가능한 야생탐사센터는 난지캠핑장의 부족한 편의휴게 시설이자 창작 예술촌으로, 주차구역 일부는 자동차 야외극장 형태의 시네마 존으로 활용되길 제안한다. 본 연구는 다목적 문화예술 공간으로의 난지캠핑장을 제안함으로써 기회 창출과 지역 경제 활성화에 도움이 되는 실속 있는 여가 공안으로 발전할 것으로 기대한다. 본 연구는 이용객 중심의 연구로 향후 이해관계자와 공급자를 중심으로 한 캠핑레저 활성화 및 문화관광자원화를 위한 후속 연구 과제의 발굴이 필요하다. Since the camping culture has been widely expanded, the campsites operated by Seoul district has been highly acknowledged. These campsites become heavily congested on weekends; however, they remain underutilized during the weekdays. In regards to this, the purpose of this thesis is focused on the revitalization of the Han River campsite for day-use visitors during the weekdays. This thesis has been processed by using the ‘Double Diamond’ service design model. Based on the field trip to Nanji campsite, the campsite facilities and usage analysis was found to the lack of entertainment. In consideration to this, four keywords have been determined when processing analysis of implementing Nanji campsite revitalization: low-budget film, indie band performance, flea market, and shuttle bus. Based on analysis of these cases, this thesis proposes a specific direction to more effective utilization of its area and the cultural art space. The intention of this idea is to provide a free spaces as a flea market and outdoor kitchen zone, tent areas as a performance zone, Mongolian tent areas as a camping zone where environmentally sustainable amenities are easily accessible, a wild exploration center as a rest facilities and creative art amenities, and the portion of a parking lot will be subdivided as a car outdoor cinema zone. Overall, this thesis will aim to support the Nanji campsite as multiple cases of cultural art space that is expected to be developed into a recreational area with substantial opportunities to help the local economy revitalization. For the future study, it needs a further inclusive approach to camping leisure revitalization and cultural tourism resources focused on the stakeholder and suppliers.
김예지 ( Ye Jee Kim ),이수형 ( Sue Hyung Lee ),박실비아 ( Sylvia Park ),나현오 ( Hyen Oh Na ),최병호 ( Byong Ho Tchoe ) 한국보건행정학회 2015 보건행정학회지 Vol.25 No.4
Background: Antibiotic resistance has been becoming serious challenge to human beings. Overuse of antibiotics, especially, for infants is concerned, but studies are very few for the prescribing pattern of antibiotic use for infants. This study analyzes prescribing patterns of antibiotics in outpatients of preschool children with acute respiratory tract infections in South Korea. Methods: Data are used from 2011 Health Insurance Review & Assessment Services-pediatric patients sample. Inclusion criteria is outpatient children (0 to 5 years) with top five frequent diseases. Prescription rates are analyzed by types of disease, provider, specialty, region, and ages. Binary or multinomial logit models are used to analyze determinants of providers’ prescription pattern. Results: The main findings are as follows. First, distributions of prescription rates are shown as L-shape or M-shape depending on the types of disease. Second, the prescription variation is so large among providers, where providers are polarized as a group with low prescription rates and the other group with high prescription rates, though the shapes are shown diversified across types of disease. Third, prescription rates appear to be lower in pediatrics and higher in ENT (ear-nose-throat). Fourth, broad spectrum antibiotics are widely used among children. Finally, the logit analysis shows similar results with descriptive statistics, but partly different results across types of disease. Conclusion: Antibiotics for respiratory tract infections of infants are used excessively with a large variation among providers, and especially broad spectrum antibiotics are used. The prescription guideline for antibiotics should be provided for each specific disease to reduce antibiotic resistance in the future.