• Proceedings of the SAREK Conference
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• 2007.11a
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• pp.105-112
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• 2007

Recently developed raised floor heating system is not only capable of basic function to reduce noise between floors, but also is a multi-functional floor heating system enabling natural ventilation. The procedure of this system for natural ventilation is to import outdoor air through bottom space of the floor heating system, circulate indoor space and discharge it out of ceiling. In winter, powerless natural ventilation is possible with buoyancy effect caused by temperature difference between outdoor and indoor. And it also allows saving of energy by importing pre-heated air in bottom space of the floor heating system. To evaluate ventilation performance of this system, on-site measurement was conducted in 2 test laboratories, and the nominal air change rate was satisfied as 0.4$\sim$0.8 h-1 under the condition of outdoor temperature $5^{\circ}C{\sim}-5^{\circ}C$, which was evaluated as highly possible to be applied as a natural ventilation system in multi-family houses.

• Korean Institute of Interior Design Journal
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• v.24 no.2
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• pp.217-226
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• 2015

As the aging society is globally increasing, the guide for the aged-friendly city is suggested by WHO and many cities are preparing to meet with it. The base of this guide for an age-friendly city is an active aging. This study examined how degree the neighborhood environment is age-friendly from older persons' standpoints. The data were collected through the interview with old persons who aged more than 65 years, 117 persons in an urban area and 110 ones in a rural area. The age-friendly degree of neighborhood environment was examined from two aspects. One is how close 12 neighborhood facilities were from the elderly's houses. Another one is how degree the elderly were considered in 4 areas: pedestrian road, traffic, the amount of housing for the elderly, and space layouts of their houses. Findings were as follows. First, the elderly related neighborhood facilities in urban area were closer located to old persons' houses than in rural area, except the senior center. Second, in case of the age-friendly degree of their neighborhood environments, the space layout of house was the highest, and then traffic, pedestrian road, and the amount of housing for the elderly, in order. The consideration degree of wheelchair users was the lowest. Third, the age-friendly degree of pedestrian road, traffic, and room layout of house in rural area were higher than in urban area. However, the amount of housing for the elderly in urban area was higher than in rural area.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.20 no.3
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• pp.55-64
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• 2017

The problem of the population number of honeybees that is decreasing not only domestically but also globally, has a great influence on human beings and the entire ecosystem. The habitat of honeybees is recognized to be superior in urban environment rather than rural environment, and predicting for habitat assessment and conservation is necessary. Based on this, we targeted Cheonan City and neighboring administrative areas where the distribution of agricultural areas, urban areas, and forest areas is displayed equally. In order to predict the habitat preferred by honeybees, we apply the Maxent model what based on the presence information of the species. We also selected 10 environmental variables expected to influence honeybees habitat environment through literature survey. As a result of constructing the species distribution model using the Maxent model, 71.7% of the training data were shown on the AUC(Area Under Cover) basis, and it was be confirmed with an area of 20.73% in the whole target area, based on the 50% probability of presence of honeybees. It was confirmed that the contribution of the variable has influence on land covering, distance from the forest, altitude, aspect. Based on this, the possibility of honeybee's habitat characteristics were confirmed to be higher in wetland environment, in agricultural land, close to forest and lower elevation, southeast and west. The prediction of these habitat environments has significance as a lead research that presents the habitat of honeybees with high conservation value of ecosystems in terms of urban space, and it will be useful for future urban park planning and conservation area selection.

• Journal of Korean Society for Atmospheric Environment
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• v.15 no.5
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• pp.625-638
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• 1999

Air quality modeling for coastal urban region has been composed of a complex system including meteorological, chemical and physical processes and emission characteristics in complex terrain. In this study, we studied about an effect prediction for deposition phenomenon affecting on air quality in Pusan metopolitan metropolitan city. In air quality modeling including ship sources, a situation considered deposition process habe better result than not considered when compared with observed value. Air pollutants emitted into urban air during the daytime nearly removed through urban atmosphere polluted. Also these phenomena correlated concentration variation connent with sea/land breezes and terrain effect. Therefore we conclude that the concentration was low at daytime when deposition flux is high, and deposition effect on industrial complex and Dongrae region is considerable in particular.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.28-33
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• 2005

This paper is about applicable technology for Advanced Urban Transit System. The first step for Advanced Urban Transit System development is marking definition of system requirement, researching foreign country's case, and setting suitable requirement spec for domestic environment. We're also trying to select suitable technology to domestic environment and reflect Advanced Urban Transit System development business through researching and analyzing involved technology form domestic also overseas.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.100-103
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• 2009

The impermeable area on the surface of city has been increased as buildings and artificial landcover have continually been increased. Urban development has gradually decreased the green zone in downtown and alienated the city from the natural environment on outskirt area devastating the natural eco system. There arise the environmental problems peculiar to city including urban heat island phenomenon, urban flood, air pollution and urban desertification. As one of urban plans to solve such problems, green roof system is attracting attentions. The purpose of this study was to investigate the heat reduction effect according to the development of green roof system and to quantify the heat reduction effect by analyzing through simulation the heat environment before and after green roof system. For thermal environment analysis, Thermo-Render 3.0 was used that was developed by Tokyo Industrial College to simulate. The simulation showed that the heat island index before and after the development of tree-planting on rooftop changed maximum $0.86^{\circ}C$ and the surface temperature changed about $20^{\circ}C$. Only with lawn planting, heat reduction effect was great and it means that the green roof system in low-management-light-weight type is enough to see effect. The simulation identified that only lawn planting for green rooftop brought such difference and could lower the heat island index at a narrow area. It is judged that application of green roof system to wider areas might relieve urban heat island phenomenon positively.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2010.10a
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• pp.159-162
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• 2010

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2005.10a
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• pp.242-243
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• 2005

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2009.11a
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• pp.508-509
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• 2009

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.04a
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• pp.157-161
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• 2006