• 설비공학논문집
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• 제28권5호
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• pp.186-194
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• 2016

As a turbulence-enhancing device, a mixing vane installed at a spacer grid of the fuel assembly plays a role in improving the convective heat transfer by generating either swirl flow in the subchannels or cross flow between fuel rod gaps. Therefore, both configuration and arrangement pattern of a mixing vane are important factors that determine the performance of a mixing vane. In this study, in order to examine the flow distribution features inside $5{\times}5$ fuel assembly with swirl-type mixing vanes used in benchmark calculation of OECD/NEA, simulations were conducted with commercial CFD software ANSYS CFX R.14. Predicted results were compared to data measured from MATiS-H (Measurement and Analysis of Turbulent Mixing in Subchannels-Horizontal) test facility. In addition, the effect of swirl-type mixing vanes on flow pattern inside the fuel assembly was described.

• Child Health Nursing Research
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• 제14권2호
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• pp.155-162
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• 2008

Purpose: The purpose of this study was to provide basic data for the development of health and safety programs by examining child-care teacher's knowledge, self-confidence and practice concerning the health and safety of children under their care. Method: The participants were 72 teachers from 15 child care centers in Seoul City and Chung-Nam Province. Data were collected using self-report questionnaires. Data were analyzed using descriptive statistics, ANOVA and Pearson correlation coefficients with SPSS 12.0 Win program. Results: The mean score for self-confidence was lower than knowledge and practice. Self-confidence score about emergency care for falls, fractures and resuscitation were lowest. For safety knowledge, scores about facility and environment were lowest. For health knowledge, scores about disease and symptoms were lowest. For practice, scores about seat belts and safe furniture arrangement were lowest. Significant correlations were found between practice and self-confidence. There were significant differences in the degree of knowledge according to education, and in practice according to age. Conclusions: Health and safety education programs for child care teachers are necessary for the promotion of knowledge, self-confidence and practice in health and safety. The results suggest that health and safety education program should be provided systematically and continuously for child care teachers.

• 한국주거학회논문집
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• 제17권1호
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• pp.1-8
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• 2006

The purpose of this study is to understand how visual factors of healthcare facilities would have an effect on psycho-physiological health of inpatients. First, visual factors of a ward, where inpatients mostly spend their time in a hospital, were extracted in order to find out how visual environment would affect inpatient's health. Then experimental samples were made and inpatients' reactions against them were analyzed. This study is composed of two approaches a questionnaire for psychological analysis and an electroencephalogram measurement for physiological analysis. The results of this experiment show that psycho-physiological health of subject's can be remarkably improved according to artificial arrangement of visual environment of a ward. Especially, they also show that insignificant changes of visual environment such as furnishing trees, flowerpots or framed pictures in a ward, where there is no view and completely closed, will be able to exert a range of positive effects on an subject's psycho-physiological health. In conclusion, further studies need to be delivered about indoor designs to positively bring in natural elements to a ward as well as visibility ratio of views and skylines from a ward.

• 한국연소학회:학술대회논문집
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• 대한연소학회 2003년도 제27회 KOSCO SYMPOSIUM 논문집
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• pp.243-250
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• 2003

The present study discuss about numerical methods to analyze design parameters of pyrolysis-melting incineration system. Various numerical methods of different viewpoint are introduced to simulate the performance of the system. Process analysis of the overall system is the beginning procedure of basic design process. Heat and material flow of each element are connected and are influential to each other, hence, an appropriate process modeling should be executed to prevent from unacceptable process design concepts that may results in system failure. Models to simulate performance of each elementary facility generate valuable informations on design and operation parameters, and, derive the basic design concept to be optimized. A pyrolysis model derived from waste bed combustion model is introduced to simulate the mass conversion and heat transfer in the pyrolysis process. CFD(Computational fluid dynamics) is an effective method to optimize the thermal reacting flow in various reactors such as combustor and heat exchanger. Secondary air jets arrangement and the shape of the combustor could be optimized by CFD technology.

• 교육시설
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• 제7권4호
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• pp.5-15
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• 2000

As the core of community, schools should play not only for the educational facilities but also for the public facilities. With the mixture of those facilities, the people in the community are able to use these facilities conveniently. The students could also make the best use of the school with the well-established facilities for sport and cultural functions. With those consideration in mind, this study aims to identify the planning feature of mixed-use school. Firstly, the concept of mixed-use and the typology of the development are reviewed. The pre-condition for the design of the mixed-use school are also studied with consideration of the planning tendencies of mixed-use schools in four countries(UK, USA, Japan and Korea). Secondly, eight case schools are selected in Japan and Korea. We analyzed them in terms of following three aspects; 1) The major functions to combine with school design, 2) The spatial arrangement how different functions could be connected in horizontal and vertical order, 3) The circulation system with which students and different user are able to access separately to those function.

• 대한가정학회지
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• 제47권10호
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• pp.97-108
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• 2009

As one of the conservation strategies, the city of Jeonju established regulations to conserve and revitalize the Hanok village as an attractive tour site. Some of old traditional houses were renovated into traditional inns. A couple of traditional houses were additionally built for lodging houses. The need for urban rehabilitation and adaptive re-use has been growing in Jeonju province. The purpose of this study was to examine how the traditional houses were converted into lodging places balancing the conflict issues such as preserving the unique characteristics of Hanok and updating functional requirement of modern lodging in terms of sustainable reuse and development. For this study, site visits and intensive interview with the owners of the seven traditional lodges were conducted. There was lack of guidelines and strategies renovation or rehabilitation of Hanok as lodging facility for sustainable use and revitalization of city. For the seven traditional Hanok inns, layout of rooms characterized as separate and disconnected, while traditional houses were open, flexible and connected regarding room arrangement. In addition, for sustainable development, the living environment of the community should be secured and align with developing strategies of the area.

• 설비공학논문집
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• 제23권12호
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• pp.799-804
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• 2011

Radioactivity of high concentrations have existed in the handling nuclear materials in hot cell of PIEF(Post Irradiation Examination Facility). The exhaust filtration system was enabled to process cylindrical filters by using a manipulator in the hot cell. By establishing a double filtration system with two filters, backup protection against leakage or failure of the first is provided by the second filter. Additionally, this a arrangement is arrange intended to increase the total filtration efficiency. The result of the pressure drop changing in the air flow of the cylindrical and HEPA filters is observed by a curved line. A filtering efficiency of more than 99.99% to $0.3{\mu}m$ particle appears in the upstream and downstream during the efficiency test on the HEPA filters. The V-pleats type had a lower pressure drop than the separator type. There was no damage during usage and was found to be suitable with high capacity of air volume. Therefore, by carrying out performance tests of the exhaust filtration system, efficiency and safety can be achieved.

• Journal of Electrical Engineering and Technology
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• 제13권5호
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• pp.2050-2058
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• 2018

Impulse characteristic of transmission tower grounding grid is needed for lightning protection of transmission line. This paper describes an outdoor experimental test facility established for large-scale grounding grid of transmission tower, made up of four impulse current generators and a circle current return electrode. The amplitude of impulse current is up to 100 kA. The results of the CDEGS simulation and GPR measurement reveal the uniform current distribution in the test arrangement. An impulse test for a square electrode with extended conductors is carried out in condition of three current waveforms with different amplitude. Based on the electrical network model and iterative algorithm method, a calculation model is proposed to simulate the impulse characteristic of large-scale grounding grid considering soil ionization. The curve of impulse resistance against the current amplitude shows the soil ionization both from the simulation and test. Deviation between the simulation and test result is less than 15%.

• 한국농촌건축학회논문집
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• 제7권3호
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• pp.46-56
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• 2005

Social welfare center is a representation agency in the local welfare system to provide the local residents with necessary services directly. The purpose of this study is to give the fundamental materials for space program in terms of planning a social welfare center by means of analyzing spatial arrangement of each section in senior welfare activity. The structure of the social welfare center should be adopted to the reality and the center of local should pay attention to enhance the quality of life in elderly. As the aspects of the programs, distinctive program should be designed. To do so, social welfare center should be adjusted to the local situation and get flexibility on operating in the local level. Each program in senior welfare activity should be connected in the spatial organization and various space should be provided in desire of elderly. So the section of dining room and medical rehabilitation is a places mostly for the elderly. Multipurpose space for the interest and leisure and the space of the senior education facility are provided in social welfare center.

• 한국항공우주학회지
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• 제32권5호
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• pp.18-23
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• 2004

한 러 풍동시험 기술협력사업의 일환으로 러시아 TsAGI T-012 풍동에서 KARI가 보유하고 있는 전진익형 항공기 모델에 대한 풍동시험을 수행하였다. Wire-suspension 모델지지부를 사용하고 있는 T-102 시험결과와 KARI 3점지지부 및 2 점지지부 시험결과를 비교하였다. 항력의 경우 KARI 시험결과와 TsAGI T-102 시험결과는 매우 좋은 일치성을 보이고 있다. 조종면에 의한 영향을 비교한 결과 두 기관의 시험결과는 요잉모멘트와 롤링모멘트에서도 매우 좋은 일치성을 보이고있다.