• Land and Housing Review
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• v.1 no.1
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• pp.75-82
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• 2010

Urban development is a cause of expansion of impervious area. A permanent storage is operated as a method of reducing runoff of watershed. The purpose of study is to propose reasonable choice of simulation model for rainfall-runoff in the prior review system on disaster effect. First, we indicated problem about concentration time choice in the flood simulation. To test the adequacy of a rainfall-runoff simulation model, We analyzed characteristics of rainfall-runoff about urban and natural watersheds. A simulation model was calibrated with the storm of july 7 to July 9 in 2009. From the result, we proposed that SWMM and kinematic wave method as the flood simulation models for urban and natural watersheds. A simulation model and design method of a permanent storage for flood that is proposed in this study will be useful for practical design of flood simulation. The hydrologic analysis method of the study can be used for capacity evaluation of permanent storage plan.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.12
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• pp.5614-5621
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• 2011

The purpose of this thesis is to derive the demand expediting measures of the garden-housing site suitable to the Pusan metropolitan region through understanding the characteristics of the preference based on the investigation of the demand. From the empirical study of the thesis, we developed the following demand expediting strategies of the garden-housing site. First, the development concept should be focused on the market demand and community building. Second, the garden-housing site has to be developed near the existing urban areas and the site must have the convenient facilities and infrastructures. Third, community building concept should be applied in the site design.

• 주택과사람들
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• s.207
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• pp.76-77
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• 2007

아파트와 단독주택 간 경계가 허물어지고 있다. 현대인들은 소득수준이 높아지고 삶의 질을 중요시 여기면서 편리함에 쾌적한 환경까지 욕심 내고 있다. 그래서 그들은 산과 들이 어우러진 곳에 살고자 전원주택으로 갔지만, 또 다른 현실적인 불편함을 극복하지 못한 채 다시 도시로 귀환하기 일쑤다. 이러한 현상에 맞춰 도심아파트에 단독주택의 쾌적성을 갖춘 아파트가 등장해 화제다.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.04a
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• pp.71-75
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• 2006

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.187-188
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• 2010

• Korean Journal of Agricultural and Forest Meteorology
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• v.19 no.4
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• pp.232-245
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• 2017

In this study, the high-resolution numerical simulation results considering landuse characteristics are analyzed by using single layer Urban Canopy Model (UCM) in Weather Research Forecast (WRF). For this, the impact of urban parameters such as roughness length and anthropogenic heat in UCM is analyzed. These values are adjusted to Seoul metropolitan area in Korea. The results of assessment are verified against observation from surface and flux tower. Forecast system equipped with UCM shows an overall improvement in the simulations of meteorological parameters, especially temperature at 2 m, surface sensible and latent heat flux. Major contribution of UCM is appreciably found in urban area rather than non-urban. The non-urban area is indirectly affected. In simulated latent heat flux, applying UCM is possible to simulate the change similarly with observations on urban area. Anthropogenic heat employed in UCM shows the most realistic results in terms of temperature and surface heat flux, indicating thermodynamic treatment of UCM could enhance the skills of high resolution forecast model in urban and non-urban area.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.155-162
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• 2020

We extracted the meaning of educational experience of the parents who moved to rural village for their children's education. While moving to the cities for the childen's education is general trend, moving to the rural village for the children's education is peculiar phenomenon. For the study, in-depth interviews were conducted with six parents who moved to rural village, and the statements were analyzed by the phenomenological analysis method of Colaizzi. As a result, thirty themes, eight theme clusters, and three meaning categories were extracted. Three categories which characterize the experience of parents who moved to rural village for their children are 'longing for nature-friendly life in rural area', 'positive experience of communication and empathy with neighbors', and 'children's happiness-centered education'. Eight theme clusters are 'dislike confined environment of an apartment', 'positive experience of childhood in the countryside', 'value direct and indirect experiences of variety', 'free and stimulating environment of countryside', 'experience of communicating and empathizing with neighbors','regret private education caused by parents' greed', 'value child centered education', 'yearn for the self-directed learning around character and art-physical abilities'. Based on the result, implications were discussed and follow-up studies were suggested.

• Journal of the Korean Society for Railway
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• v.19 no.3
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• pp.297-303
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• 2016

This paper introduces auxiliary power supply systems (APS) for railroad applications and proposes a new power conversion structure for highly-efficient and lightweight APS systems. The proposed structure focuses on an improvement of the power density in APS. It eliminates unnecessary power conversion stages in the conventional APS structure by modulating the dc/dc converter circuit and the structure of the system. The dc/dc converter circuit used in the proposed structure is based on a multi-level half-bridge converter, a widely used topology in railroad APS applications; a flying capacitor is newly added to the conventional circuit. The added capacitor is used not only to enhance the soft switching condition of the switches, but also so that the new pantograph will have a side voltage source of a battery charger in the APS structure. Since the battery charger uses the pantograph side voltage source in the proposed structure, rather than using the output of the main dc/dc converter in the conventional structure, the size and efficiency of the main dc/dc converter are reduced and increased, respectively. To verify the effectiveness of the proposed structure, simulation results will be presented with metropolitan transit APS specifications.

• Journal of the Korean housing association
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• v.17 no.1
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• pp.29-36
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• 2006

Welwyn Garden City benefits from the greater design cohesion and management of development which gave it a more distinctive 'brand image' almost from the outset than its older garden city(Letchworth, Hampstead). Its planner, Louis de Soissons, brought a more obvious sense of traditional formal urbanism to the design of the second garden city. This was rather different to the distinctive but rather more informal arts and crafts approach of Raymond Unwin. Here it attempts to analyze how they greatly and firmly established the concept of Housing Group in the residential design, and what similar elements between Unwin and de Soissons in the New Town planning. It is pointed out that the Housing Group theory is composed of recognizing urban life as totality, and group planning theory, and that they definitely originated a new technique in the residential area. It is analyzed that the syntactic relations between the group planning theory and enclosed housing cluster designs in the English garden city are epitomized in Welwyn Garden City.

• Proceedings of the KIEE Conference
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• summer
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• pp.1328-1330
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• 2004

기존노선을 이용한 고속화 신기술 개발사업 과제를 수행하여 중장거리 및 도시간의 교통해소를 위해 중고속 철도차량을 개발하여 최고속도 180km/h의 속도로 운행할수 있는 차량의 주요 전기시스템인 주변압기, 주변환장치, 견인전동기, 보조전원장치의 설계 및 사양을 정립하여 TTX차량을 제작하는 연구를 수행하였다.