• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.5
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• pp.454-463
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• 2013

The smart phone has already proliferated, and the smart devices of the living appliances and vehicles embedded with communication device, sensors and connected with the smart phone have been developed. Currently it can provide simple remote controller and user interfaces, it could be envisaged that intelligent technology is converged with the smart phone, and Personal Environment Service in which the smart devices are configured automatically as reflecting personal preference, device attribute, and living environment condition would be activated in the future. In this paper PES services, system architecture, and core technology are described.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1999.11a
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• pp.42-48
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• 1999

An experimental study was performed to discover the effect of environment on the tribological behavior of Si-incorporated diamond-like carbon(Si-DLC) film slid on a steel ball. The films were deposited on Si(100) wafers from radio-frequency glow discharge of mixtures of benzene and dilute silane gases. Experiments using a ball-on-disk test-rig was performed under vacuum, dry air and ambient air conditions. It was observed that coefficient of friction was decreased as the environmental condition changes from vacuum, to dry air. It was also observed that the coefficient of friction decreased with increasing silicon concentration in the film. Chemical analyses of debris suggested that the low and stable friction coefficient is closely related to the silicon rich oxide debris and the rolling action.

• Journal of the Korean housing association
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• v.17 no.2
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• pp.41-46
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• 2006

This study aims to analyzed thermal comfort characteristics and subject response for thermal environment of Korean traditional houses.. The air temperature and humidity in the living area of the residence were measured in during a day. And the subject response were surveyed to evaluate of controling the thermal environment factor (temperature, humidity, comfort) of the korean traditional houses. As a result, the variation of air temperature and humidity of most rooms are considerably static while condition of outdoors are much varied, it is showed that indoor climate has been controled with traditional soiled walls. And environmental control for the air temperature and humidity is estimated considerably satisfactory.

• Journal of the Korean Home Economics Association
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• v.30 no.3
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• pp.131-140
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• 1992

The purpose of this study was to investigate the heating regulation systems and the thermal environment of the Co-Generation apartment house in winter. Personal self-administration and interview method were used in the survey of this study. The respondents were 352 housewives who resided in Mokdong apartement using Co-Generation heating systems. Data was analyzed using SPSS PC+ computer package. The results of this study were summarised as follow; The typical patterns of heating regulation systems were intermittent and partial heating in the living room and bedroom exclusive of kitchen area. The present condition of the thermal environment were relatively warm in winter and Heatng regulation systems were influenced by type of location. Determinants of the thermal sensation and thermal comfort were the type of location of apartment as a architectural factor, clo as a personal factor.

• Aerospace Engineering and Technology
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• v.3 no.1
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• pp.86-96
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• 2004

Space environment has various hazard effects on satellite. These effects can not be experienced in earth ambient condition. In terrestrial space, plasma or atomic oxygen could erode satellite surface. Also ultra violet or particle radiation may damage surface materials or electronic parts which constitute satellite. So, in designing satellite, the natural environment of operational orbit should be investigated and appropriate mitigation should be prepared.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.901-905
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• 2008

This study was conducted to clarify the heat load characteristics and heat and moisture behavior of underground structures. The authors achieved this by carrying out a numerical analysis using simple heat diffusion and simultaneous heat and moisture transfer equations based on measurement data. This paper presents the results of a numerical analysis on the heat load characteristics and heat and moisture behavior of an underground basement and its surrounding ground under a condition of internal heat generation. The authors found it difficult to predict the heat behavior and heat load of the underground basement by simple heat diffusion alone. Accurate prediction of the thermal environment and heat load requires careful consideration of the influences of moisture and precipitation

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.1225-1230
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• 2008

Recently the building material have been developed with the concept of controlling the indoor environment as well as the concept of emitting contaminants less. So, a lot of products with humidity control characteristics put it on the market. However, objective evaluation to these products doesn't work out. Thus consumers cannot obtain accurate information to these products. Therefore, we selected inorganic paint in the functionality materials and evaluated its humidity control characteristic in this research. We divided by four stages and evaluated this inorganic paint. The 1st and 2nd third experiments were executed on a natural condition and the fourth experiment was executed with humidity had been raised by using the humidifier.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.877-882
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• 2008

The purpose of this study is to analyze the characteristics of outdoor thermal environment of flat-type apartment houses and tower-type apartment houses in summer by numerical simulation. After inputting a building condition at CAD, we calculated the surface temperature for two apartments by using the numerical simulation of a clear sky day in summer in Seoul. The results indicated that the variation in Heat Island Potential(HIP) of tow apartments were not only in the day but also in the night. According to form of apartment the flat-type apartment houses appeared $1.3^{\circ}C$ more highly tower-type apartment houses.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.19-23
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• 2010

Injection characteristics of a kerosene swirl injector of liquid rocket engine operating at supercritical environment have been investigated. Kerosene surrogate models are proposed to model the kerosene properties. Turbulent numerical model is based on large eddy simulation and contains Soave modification of Redlich-Kwong equation of state and Chung's model. Numerical analysis results at supercritical environment are compared with the one at transcritical condition. Differences of density and viscosity are analyzed at both liquid film and core gas in the swirl injector.

• Korean Journal of Environment and Ecology
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• v.11 no.4
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• pp.391-396
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• 1998

Herpetofauna of the Naesorak in Sorasan National Park was carried out both June 30, 1997~July 3, 1997. 6 species of 5 Families in Amphibian and 3 species of 3 families in Reptilian were observed in thes survey. It was observed relatively poor biota to Kaya, Sokri, and Chri National Park in Korea. There were three Specific Endangered Animal assigned by Minister of Environment such as Bufo stejnegeri, Rana dybowskii and Eremius argus. Especially Eremius argus was abundantly distributed around Limansuryonjang. So Limkansuryonjang should be conserve for Eremias argus's stable environmental condition.