• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문발표회
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• pp.107-111
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• 2003

The need for this study must be considerable, as being activate of green roofs research that the organization and construction obtain access to more development technologies. Nevertheless, the green roofs system has begun to apply since 1980's, the green roofs technology was restricted to develop without verification of technologies such as a load or water leakage. There is a limit as urethane waterproofing to almost domestic waterproofing materials and methods of construction for general green roofs. The introduction of materials and methods of construction which are appropriated to property of green roofs could be a decisive factor in a long-range durability and economical maintenance cost, moreover. it support to variety construction system and organization. This present paper describes a necessity of waterproofing and root barrier system is one of the sub-organization based on green roofs construction. which have enormously large impact on the durability.

• 농촌지도와개발
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• 제23권3호
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• pp.335-346
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• 2016

For the purpose, this study examines to identify factors influencing urban to rrual migration for farming. This study analyzed 217 urban to rural migrant farmers. The result of this study were as follows: the influence of the main variables on the agricultural challenges of the urban to rural migrant farmers were observed as the relationship of the level of financial preparations, the motivations of urban to rural migration, the agricultural income, the annual of urban to rural migration, the size of agricultural, gender, and age. This study result show that urban to rural migrant farmers' agricultural challenges is influenced by almost economical factors. Therefore, for the successful agricultural activities of the urban to rural migrant farmers show significant impact to need on the composite effort of all such as the individual, the family, the rural society, local autonomous entity, the government.

• 대한조선학회지
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• 제52권2호
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• pp.19-24
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• 2015

A reliable assessment and analysis of the condition of high pressure and temperature steam pipelines requires defining stress state, which will take into consideration not just the impact of internal pressure and temperature but all applied loads. For that, usage of modeling and numerical methods for calculation and analysis of stress state is essential. The main aim of piping stress analysis is to check the design of piping layout, which will allow simple, efficient and economical piping supports and provide flexibility to the piping system for loads and stresses. The piping stress analysis is carried out using CAESER II software. By using this software we can evaluate stresses, stress ratios, flange condition, support loads, element forces and displacements at each node and points. In this paper, only the maximum and minimum displacement results are tabulated, which is also shown in detail by an example of main steam pipelines of UST Main Engine System [1].

• 한국초전도ㆍ저온공학회논문지
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• 제10권1호
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• pp.62-66
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• 2008

The characteristic of the superconducting magnetic energy storage(SMES) system is faster response, longer life time, more economical, and environment friendly than other uninterruptible power supply(UPS) using battery. So, the SMES system can be used to develop methods for improving power quality where a short interruption of power could lead to a long and costly shutdown. Recently, cryogen free SMES has developed using BSCCO(Bismuth Strontium Calcium Copper Oxide) wire. We fabricated and tested the conduction cooling system for the 600 kJ class HTS SMES. The experiment was accomplished for the simulation coils. The simulation coils were made of aluminium, it is equivalent to thermal mass of 600 kJ HTS SMES coil. The coil is cooled with two GM coolers through the copper conduction bar. In this paper, we report that the test results of cool-down and heat loads characteristics of the simulation coils. The developed conduction cooling system adapted to 600 kJ HTS SMES system and cope with the unexpected sudden heat impact, too.

• 한국환경생태학회지
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• 제28권3호
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• pp.374-380
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• 2014

본 연구는 최근 우리나라 자연환경 기반 휴양시설의 중요한 공급요소로서 숲길의 조성과 운영에 대한 지역주민들의 태도을 파악하여 향후 체계적인 숲길운영을 위한 기초자료 제공을 목적으로 수행되었다. 이를 위해, 지리산 둘레길을 주변에 거주하는 지역주민 대상의 설문조사를 실시하였다. 조사결과, 지리산둘레길 조성 사업이 지역사회에 미치는 영향요인으로서 경제 환경 측면의 긍정적 영향과 부정적 영향의 4가지 요인이 도출되었다. 지역주민은 숲길 조성이 지역경제에는 긍정적인 영향을 미치고 있는 것으로 인식하였다. 반면에 숲길조성의 환경적 영향에는 부정적인 태도를 보였다. 지역주민이 참여하고자 하는 서비스 업종은 방문객이 선호하는 서비스인 지역 숙박업으로 나타났다. 그러나 이러한 관광서비스 업종은 아직 지역사회의 숲길 연계 사업구조로서 취약하여 향후 적합한 지역 사업모델에 대한 전문적이고 체계적인 접근이 필요할 것으로 사료된다.

• Current Photovoltaic Research
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• 제11권4호
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• pp.134-143
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• 2023

Efforts are being made to respond to global warming. Interest in and demand for the private sector-led RE100 campaign is also increasing. Self-built solar power generation, one of the implementation tools for RE100, is not expanding. However, it can be an economical means of implementation in the long run. In this study, we intend to analyze the impact on the optimal ratio of self-solar power generation using HOMER simulation. OPR defines the optimal solar power generation ratio and looks into what changes there are in the optimal solar power ratio when self-power consumption increases and external power purchase price changes. As a result, the optimal rate of self-solar power generation has a low impact even if self-power consumption increases. As the external power unit price increases, the optimal ratio increases, and at a power unit price of 100 KRW/kWh, OPR is 24%; at 200 KRW/kWh OPR is 31%; and at 300 KRW/kWh OPR is 34%. This shows that the electricity price replaced during the life cycle has a high impact on the economic feasibility of solar power generation. However, when the external power unit price reached a certain level, the increase in OPR decreased. This shows that it is difficult for domestic companies to achieve RE100 based on the economic feasibility of solar energy alone. Therefore, efforts are needed to supply renewable energy in the public sector.

• 농촌지도와개발
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• 제16권3호
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• pp.503-532
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• 2009

This study aims at identifying any difference in the quality of life according to the patterns of living together in the family for the aged women who live in the rural areas. The findings of this study can be summarized in brief. First, those aged women who live alone showed a higher ratio of works like farming with less average income and less perception of living standards but better ADL than those of the aged women who live together with their family. Second, as a result of logistic regression analyses to identify factors to predict the patterns of living together in the family for the aged women in the rural areas, those aged women who live alone showed more cases of farming, higher ADL level, higher degree of economical preparations and more perception of intimacy with their offspring than those of aged women who live together with their family. Unlike these results, those aged women who live together with their family have less average income, more phone calls with their neighbor and higher quality of life that those of aged women who live alone. Third, as a result of impact variables in the quality of life by the pattern of living together in the family for the aged women in the rural areas, those aged women who live together their family showed higher quality of life with better preparations for the health, emotion and economy for their aged life, and with less number of offspring and more frequency of phone calls with their neighbor. In addition, those aged women who live along in the rural areas showed higher quality of life with better emotional preparations, better economic preparations, more number of offspring, more friendly with their neighbor and more emotional supports.

• 마케팅과학연구
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• 제13권
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• pp.1-27
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• 2004

인터넷 쇼핑몰 초기부터 지금까지 쟁점이 되고 있는 이슈인 종합쇼핑몰이 더 유리한가 아니면 전문쇼핑몰이 더 유리한가를 점검해 보고 또한 두 쇼핑몰 유형의 성과에 영향을 주는 요인들에 차이가 있는지를 검토해 볼 필요가 있다. 본 논문의 연구목적은 소비자들의 인터넷 쇼핑몰 평가기준과 쇼핑만족, 재방문빈도, 재구매의도 간의 인과관계를 규명하고 그러한 관계와 영향요인들이 인터넷 종합쇼핑몰과 전문쇼핑몰간에 차이가 있는지를 분석하는 것이다. 구조방정식 모형을 사용하여 연구가설을 검정한 분석결과는 다음과 같다. 첫째, 종합쇼핑몰에서는 쇼핑몰의 오락성과 상품에 대한 제품인증, 상품경제성, 배송적시성이 쇼핑만족에 유의한 영향을 미치는 것으로 나타났고, 전문쇼핑몰에서는 소비자의 쇼핑만족에 정보유용성 상품경제성, 그리고 배송적시성 등이 유의한 평가속성으로 나타났다. 둘째 기대와는 다르게 쇼핑몰의 사이트 디자인과 상품다양성은 종합쇼핑몰, 전문쇼핑몰 모두에서 쇼핑만족에 유의한 변수로 작용하지 못하였다. 마지막으로 인터넷 쇼핑몰에서의 쇼핑만족은 종합쇼핑몰과 전문쇼핑몰 모두에서 재방문빈도와 재구매의도에 영향을 미치고 재방문빈도가 높을수록 재구매의도도 높아지는 것으로 나타났다. 이러한 분석결과를 바탕으로 관리적 시사점이 도출되었다.

• 보건행정학회지
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• 제26권1호
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• pp.24-29
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• 2016

Background: Socio-economical status, represented by poverty, is a potent factor in predicting health status, because preventable illness and death occurs due to poverty and socio-economical situation. This study aims to provide information towards on the correlation between poverty and self-rated health in consideration of elements of health behaviors and family and friend support in Philippines. Methods: Data was collected on 15th to 28th of February 2011 by using structured questionnaire through interview method. Study area is Antipolo and Tondo in Manila, Philippines. Sample size was 1,100 but only 658 cases was analyzed due to incomplete questionnaire. Results: Results show that the poverty has direct negative influence on self-rated health, while the presence of family and friend support decreased negative influence. And through the analysis of mediated moderation model, similarly poverty has also indirect negative effect on self-rated health by health behaviors and family and friend support. Especially, regular exercise was found to be a major variable that mediates poverty and self-rated health. Conclusion: In conclusion, to improve the self-rated health state of respondents need to provide emotional support especially from family and friends. Also regular exercise should be encouraged by raising health awareness through continuous health education and promotion for the residents in order to develop health behaviors.

• International Journal of Automotive Technology
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• 제4권2호
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• pp.77-86
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• 2003

How to compare the environmental damage caused by vehicles with different foe]s and drive trains\ulcorner This paper describes a methodology to assess the environmental impact of vehicles, using different approaches, and evaluating their benefits and limitations. Rating systems are analysed as tools to compare the environmental impact of vehicles, allowing decision makers to dedicate their financial and non-financial policies and support measures in function of the ecological damage. The paper is based on the "Clean Vehicles" research project, commissioned by the Brussels Capital Region via the BIM-IBGE (Brussels Institute for the Conservation of the Environment) (Van Mierlo et at., 2001). The VriJe Universiteit Brussel (ETEC) and the universite Libre do Bruxelles (CEESE) have jointly carried out the workprogramme. The most important results of this project are illustrated in this paper. First an overview of environmental, economical and technical characteristics of the different alternative fuels and drive trains is given. Afterward the basic principles to identify the environmental impact of cars are described. An outline of the considered emissions and their environmental impact leads to the definition of the calculation method, named Ecoscore. A rather simple and pragmatic approach would be stating that all alternative fuelled vehicles (LPG, CNG, EV, HEV, etc.) can be considered as ′clean′. Another basic approach is considering as ′clean′ all vehicles satisfying a stringent omission regulation like EURO IV or EEV. Such approaches however don′t tell anything about the real environmental damage of the vehicles. In the paper we describe "how should the environmental impact of vehicles be defined\ulcorner", including parameters affecting the emissions of vehicles and their influence on human beings and on the environment and "how could it be defined \ulcorner", taking into account the availability of accurate and reliable data. We take into account different damages (acid rain, photochemical air pollution, global warming. noise, etc.) and their impacts on several receptors like human beings (e.g., cancer, respiratory diseases, etc), ecosystems, or buildings. The presented methodology is based on a kind of Life Cycle Assessment (LCA) in which the contribution of all emissions to a certain damage are considered (e.g. using Exposure-Response damage function). The emissions will include oil extraction, transportation refinery, electricity production, distribution, (Well-to-Wheel approach), as well as the emission due to the production, use and dismantling of the vehicle (Cradle-to-Grave approach). The different damages will be normalized to be able to make a comparison. Hence a reference value (determined by the reference vehicle chosen) will be defined as a target value (the normalized value will thus measure a kind of Distance to Target). The contribution of the different normalized damages to a single value "Ecoscore" will be based on a panel weighting method. Some examples of the calculation of the Ecoscore for different alternative fuels and drive trains will be calculated as an illustration of the methodology.