• The Korean Journal of Ecology
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• v.13 no.1
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• pp.67-73
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• 1990

The airborne pollens were investigated by 11 pollen traps in Seoul from September to November, 1986 and from March to May, 1987. There were 25 families and 36 genera of which pollens were observed, the amount of airborne pollens was most in May, and least in November. Distribution patterns of ariborne pollens were that of herbs, such as Ambrosia, Artemisia, Humulus, and persicaria in fall, and that of trees, such as Alnus, Salix, Corylus, Pinus, Platanus Betula, and Quercus in spring. From the viewpoint of regional distribution, pollens were much observed at a residential section and an industrial area in fall, and at a park region in spring.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2002.10a
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• pp.77-80
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• 2002

This research was carried out to show the method of preserving high-grade farmland or Agricultural Development Area to contribute to the self-sufficiency of food as well as promotion of industrialization and urbanization, which has reduced 22,000 ha of farmland per year during last 10 years. However, in securing housing estate areas, the farmland conservation policy conflicts with housing supply policy for demands on more comfortable dwelling life for people, which leads to serious situation in Capital Circle of living more than 50 % of total national population. Therefore, this presents the method of fulfillment both the farmland conservation policy for self-sufficiency of food and the housing supply policy for proposition of securable residential areas.

• International Journal of High-Rise Buildings
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• v.1 no.3
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• pp.155-167
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• 2012

This paper introduces the outlines of review and approval processes, general criteria and usual practices taken in Japan for the seismic design of high-rise buildings. The structural calculations are based on time-history analyses followed by performance evaluations. This paper also introduces structural design of two high-rise buildings: one is a 100 m high reinforced concrete residential building, and the other is a 300 m high steel building for mixed use.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 2005.03a
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• pp.195-202
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• 2005

High-rise residential buildings in these days tend to adopt a building frame system as primary earthquake resisting structural system for some architectural reasons. But there exist several ambiguities in designing such building frame systems according to current codes, with regards to : the effective stiffness property of RC cracked section in static and dynamic analyses, analytical model to evaluate story drift ratio and, deformation compatibility requirements of frames. The comparative study for these issues by appling IBC 2000 and KBC 2005 to a typical building frame system shows that demands of member strength and story drift ratio can be different significantly depending on designer's interpretation and application of code requirements.

• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.201-204
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• 2004

Consider the optimal design for PV system, it is apply to 3kW interconnected electric power PV system, that is a point of reference for 3kW PV the spread residential section system. Through the driving various practical system, we look into that for efficiency of generation and stability of interconnected system. Using obtained data acquisition, It can be suggest that installation and management for system parameter to optimal design maximum generation electric power. PV system have some losses that are variation radiation, shadow, change temperature, unbalanced grid connection, serial circuit loss, MPP deference loss, PCS loss and so forth. Using obtained various performance characteristic result, we can make database in the future, through the this study, we can get the reliance and have regard to spread PV system.

• Journal of Korean Association for Spatial Structures
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• v.19 no.3
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• pp.77-83
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• 2019

AU(A plus U-shaped) composite beam was developed for reducing the story height in the residential buildings, and saving the cosrtuction cost of floor structures. Structural performance and economic feasibility of the composite beam have been sufficiently approved through the structural experiments and the analytical studies. Fire safety for the practical application of the composite beam has also been verified through the fire resistance tests and the heat transfer analyses. In this study 2-points bending tests were performed on the four specimens already tested for fire resistance to evaluate the residual bending strength of AU composite beam after fire accident. The same bending test was performed on the one fresh specimen having the same section and span of the specimens for practically comparative study.

• Journal of the Korea Concrete Institute
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• v.26 no.5
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• pp.635-642
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• 2014

The weight of concrete could be reduced by using hollow core slabs instead of heavy solid slabs, leading to cost reduction. The long span be also achieved by introducing prestress in hollow core slabs. but the evaluation of shear strength of precast-prestressed hollow core slabs are needed because the cross section is reduced in web and arranging shear reinforcement is not possible. In this study, the shear strength of precast-prestressed hollow core slabs were evaluated based on experimental tests. For this purpose, six full scale specimens were made and tested. The shear strength of the specimens were compared with those evaluated from current design provision(EC2 ACI, EN1168 and AASHTO).

• The Journal of the Korea Contents Association
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• v.10 no.10
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• pp.294-303
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• 2010

The law on promoting rationalization of mansion management is the one that was enacted with the aim of enhancing stability of people's life and further of promoting sound development in national economy, by securing good residential environment of mansion in Japan. A rise in mansion, the distinct characteristics of a residential form that only mansion has, and the insufficiency of legal modification related to this are the issues that have been steadily proposed in academic circles and practical affairs in Japan. Also, in the managerial aspect, even problems about the operation of the management association, the maintenance & repair, the management contract on management agency in management association, and the correct transfer of design completion plan have been pointed out. To solve these problems, the law of rationalization was legislated. However, the law of rationalization can be ultimately evaluated to suggest its solution on a problem about forming agreement on mansion management. On the other hand, it is concerned about the management association and section owner in mansion, and about mansion that was progressed aging considerably. For example, it is proposing or suggesting duties in several forms caused by dwellers' diversity to local self-government. Thus, it is a fact that a number of difficulties exist in smoothly enforcing the law of rationalization.

• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.195-198
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• 2008

In this study we analyzed flood runoff and flood characteristics of an small urban river basin which is in an apartment complex in Yewol-Dong, Buchun-Si, Gyunggi-Do. A little discharge normally flows in the river, however this small river has a relatively high potential of flood damage risk in the flood season due to the high flood level and velocity. Therefore we used the GIS data, cross section data in the river, HEC-RAS model, etc. for investigating safety of a river against flood runoff and also we investigated the stability of hydraulic structures and ability of flood prevention in the river. As the result of investigation, we found that the river had the risk of flood damage occurrence due to the hydraulic structures constructed for various purposes in the river. So we should analyze backwater effect by the structures and consider the risk factors can be occurred by the flood runoff and velocity for more safe design of a small river basin in the residential area such as an apartment complex in the urban area.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.5
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• pp.71-78
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• 2018

This study seeks to identify elements of spatial planning for areas surrounding children's parks in order to improve child safety. It will identify different aspects of child safety and extract elements of safety planning for the areas surrounding children's parks from a literature review of both domestic and international research. The study classifies the space between one's residence and the children's park as either a "means of access", such as pedestrian walkways and streets, or a "boundary", which consists of the entrance, exit, and fences; then, the derived safety planning elements were categorized in accordance with this classification. In order to ensure the validity of the planning elements, an expert survey was conducted of environment planners who specialize in the palnning and designing of residential area as well as government employees who are in direct charge of managing children's parks. The survey findings were as follow. First, the pedestrian walkway(means of access) near the park is the most crucial factor in regards to the safety of children, followed by the entrance and exit(boundary), fency(boundary), and streets (means of access), in descending order of importance. Thus, improving the safety of the pedestrian walkway should be considered first and foremost, and it should precede improving the surrounding streets. Second, an investigation of the need for safety devices near the children's park showed that securing visibility, through the installation of an illegal parking prevention device, is imperative. Illegal parking near children's parks poses a grave risk to pedestrian safety and demands immediate action. Furthermore, a section of streets within 300m of the park entrance should be designated as a children protection zone, in addition to the designation of school zones near elementary schools.