• The KSFM Journal of Fluid Machinery
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• v.7 no.4 s.25
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• pp.47-52
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• 2004

Cryogenic pump test facility (CPTF) is designed and developed in KARI. Hydraulic and cavitation performance of pump and inducer in cryogenic environment can be measured. Working fluid is liquid nitrogen and operating temperature is $-197^{\circ}C$. Run tank, catch tank of liquid nitrogen and their pressurizing tank has been built and remote tank pressure control system are installed. Maximum power of driving motor is 320 kW and its maximum speed is 32000rpm. Cryogenic fluids and lubricating systems are effectively separated that long test times are acquired. Therefore hydraulic and cavitation performance can be measured accurately and effectively. Pre-cooling test of the facility was successfully accomplished. This facility will contribute greatly to the development of turbopump for KSLV.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.10 no.3
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• pp.251-259
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• 1998

Environmental control facilities are used to simulate an environment or combination of environments under which many kinds of research and tests can be performed. The design of the control system to maintain desired environmental conditions is essential to proper operation of the facility. A simulation model of the facility has been developed by analyzing each component of the system thermodynamically with necessary properties and heat transfer relations. Using the system simulation model, the required characteristics of the control system has been investigated. PI controller is considered as the most probable controller for this kind of the facility, and electric heater power is shown as the Proper manipulated variable for temperature control.

• International Journal of Air-Conditioning and Refrigeration
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• v.8 no.1
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• pp.62-72
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• 2000

Environmental control facilities are used to simulate an environment or combination of environments under which many kinds of research and tests can be performed. The design of the control system to maintain desired environmental conditions is essential to proper operation of the facility. A simulation model of the facility has been developed by analyzing each component of the system thermodynamically. with necessary properties and heat transfer relations. Using the system simulation model, the required characteristics of the control system has been investigated. PI controller is considered as the most probable controller for this kind of the facility, and electric heater power is shown as the proper manipulated variable for temperature control.

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.793-794
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• 2004

• The Journal of Sustainable Design and Educational Environment Research
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• v.10 no.1
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• pp.26-33
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• 2011

The deaths caused by industrial accidents during the construction of the mortality rate is considerably higher than in other industries. To prevent such a disaster workers and to minimize unsafe behavior measures to be drawn, and construction companies recently to stimulate the emotions of the workers to participate in voluntary activities are safe. In this study, the construction workers can stimulate emotions and activities on the environment by examining the preferences of the workers on-site management will want to take advantage. This study revealed that the construction workers prefer the incentive most and then working environment.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2002.11a
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• pp.161-166
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• 2002

Functional ability is an important criterion to predict the capability of older persons to maintain independent living in the community setting. This study focused on the effect of built-environment features to ameliorate declines in functional ability and reduce the likelihood of relocation. Using longitudinal data from the Asset and Health Dynamics Among the Oldest Old (1993, 1995), relocation was analyzed for 6,225 respondents aged 70 or older. Findings are that while functional decline in household activities of daily living among older persons increased their residential moves in the community, functional declines in basic activities of daily living, household activities of daily living, and advanced activities of daily living among them increased their entrance into an institutional care facility However, they were less likely to enter an institutional care facility when their home was equipped with built-environment features such as street level ramps, special railings, modifications to allow someone in a wheelchair, grab bars or shower seat in the bathroom, and special call device or system to get help.

• Journal of Families and Better Life
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• v.23 no.4 s.76
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• pp.67-77
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• 2005

The purpose of this study was to identify housing attributes that make residents feel 'at home' in ALFs in Southwest Virginia. For this purpose, residents' needs, experiences, and opinions of the physical environment, the social environment and the organizational environments such as policies and programs of ALFs were identified. As a multi-case study, five ALFs in Southwest Virginia were studied using constant comparative methods of data analysis. In addition to face-to-face interviews with 25 residents and 5 administrators of five ALFs, observations were conducted with personal journal. Each facility was designed to be a single-family house or multi-family dwelling in outside appearance. Most of the respondents were satisfied with their current dwelling as a 'home' in terms of homelike attributes such as 'autonomy/ privacy', personalization,' safety and security,' services and care,' independence,' social interaction/friendship,' family support,' and 'rules and regulations.' In spite of high satisfaction with the facility, however, many people did not think of their current dwelling as a real 'home'. As the biggest difference between living in their own homes and living in the ALF, people feinted out a lack of independence and social interaction. Residents of ALFs may have reordered their priorities in their current life situation so that safety, security, and caie were more important to them than fooling "at home."

• Journal of the Korean housing association
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• v.21 no.5
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• pp.125-135
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• 2010

As the educational environment is qualitatively improved by revision of the school curriculum, local residents become increasingly interested in sharing the educational environment through the mixed-use of school facilities. The purpose of this study was to obtain a better understanding of the use and need for school facilities. This study involved a literature review and a survey of local residents who have used school facilities. The results are as follows: (1) sports and learning facilities were the most used of five different types of school facilities, (2) school facilities were mainly used in the evenings (18:00~22:00 hrs), but the respondents differed in terms of time of use according to gender, age and work hours, (3) the result showed high needs for all types of facility and needs for sports facilities among them were the highest, and (4) preferred time of use was varied according to the type of facility and the residents' characteristics. In conclusion, this study explored various directions for the mixed-use of school facilities by analyzing local residents' current use and their needs for further use of these facilities, taking into account the different characteristics of the users.

• Journal of Korean Society on Water Environment
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• v.28 no.1
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• pp.121-128
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• 2012

The purpose of this study is to solve the problem of nutrient removal due to rapid hydraulic retention time (HRT) variation in small size private sewage treatment facility and to have better effluent quality by using natural zeolite as a coagulant aid. The experiments were conducted by applying different conditions of HRT, coagulant, and zeolite dosages. As an experimental result, $TBOD_{5}$, TSS, and TP removal efficiencies were 64.9%, 94.5%, and 98.8% at co-injection with zeolite. Overall removal efficiencies of $TBOD_{5}$, TSS, and TP have improved 15.7, 28.7, 6.1%, respectively. This result shows that zeolite addition could improve flocculation, increase setting velocity, and thus have better treatment. Therefore the use of zeolite as a coagulant aid can be useful in small size private sewage treatment facility, where especially extra nutrient removal is required to meet the legal standard for discharge.

• Journal of the Korean Institute of Educational Facilities
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• v.25 no.3
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• pp.3-12
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• 2018

This study was executed by means of "user participatory design method", as a part of the public facility remodelling project supervised by the Seoul Municipality. This study aimed to complement and improve the methodology through reviewing the whole process of participatory design implementation and examining closely whether the activities, design methods and tools that have been applied at each stage were helpful to reflect the users' demands successfully. Given all of those, it implies; first, it is very meaningful that public facility remodelling project by "user participatory design" leads the ordinary users to have direct opportunity to participate in the public business and to change their perception of the restroom environment in school. Second, it is necessary to integrate the roles of the facilitator and the architect from the beginning stage of the process, which makes it feasible to reflect the users' needs to the final stage. Third, it is required to modify the design tools that enable non-professional participants to understand their tasks and to perform them effectively at the stage of decision making.