• Journal of The Korea Institute of Healthcare Architecture
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• v.19 no.2
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• pp.51-59
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• 2013

Purpose: At the moment, a lot of poor older people live in permanent rental housing in Korea. But many rental apartments are not suitable for elderly living because most of them have many problems related to the lack of accessibility and adaptability for older people with physical and mental disabilities. So it is necessary to upgrade the old permanent rental housing for convenience of elderly living. The purpose of this paper is to construct basic data for remodeling of worn out and small rental housing block in order to realize the concept of "Aging in Place". Methods: Questionnaires and interviews about elderly living have been conducted on 104 elderly who live in Suwon Wooman permanent rental apartment block which was constructed 21 years ago. From the collected data, dining pattern, inconvenient area, small area, satisfaction level on unit area and demand for unit expansion type have been analysed in order to find out the direction for remodeling of permanent rental apartment unit. Results: The problems of existing permanent rental apartment can be summarized into improper laundry space, small dining area, inconvenient bath and so on. According to the family size, the elderly resident has the different preference about the expansion type of his resident unit. Big families usually want to enlarge their living unit though they pay for additional monthly rental fee. Implications: Lifetime home concept adopting Universal Design has to be applied to the whole residential block especially to the social rental housing. And this concept had better be expanded to Lifetime neighbor design.

• Journal of the Korean Association of Geographic Information Studies
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• v.15 no.4
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• pp.42-54
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• 2012

The main purpose of this study is to suggest the spatial statistical approach suitable for the delimitation of Busan CBD. For this purpose, Getis-Ord $G_i^*$ and both of IDW (Inverse Distance Weight) and FDB(Fixed Distance Band) were applied to delimit the CBD boundary. And then, the results of the CBD boundary were compared and verified with the methodologies of the previous studies. The result of IDW accorded with the previous study relating to the delimitation of the boundary of CBD, and the result of FDB was reflecting the characteristics of the mixed-use residential of a transition zone. As a result of the land use quotient, the mixed land use of residential and commercial was highly specialized in the boundary of FDB. These results will be able to support the understanding of urban spatial structure and the effective CBD management.

• Korean Journal of Construction Engineering and Management
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• v.13 no.3
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• pp.34-42
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• 2012

Green frame technology intended to facilitate the remodeling of apartment housing complexes in Korea and extend their service life has been developed. Green frame design is a Rahmen structure using composite precast concrete members and, unlike a bearing-wall structure, lifting and installing structural members accounts for major steps of structural construction. Therefore, if green frame structure construction is to be scheduled appropriately, systematic lifting plan needs to be developed in advance. Development of lifting plan also requires unit lifting process of composite PC members (columns and beams) that consist of green frame to be analyzed first. Therefore, this study attempts to analyze the lifting process of composite PC members used in green frame structure. To that end, lifting procedure and time of composite PC column and beam are estimated and applied to a project case to analyze the lifting cycle of reference floor. Outcomes produced herein will be used as key data for development of lifting plan in subsequent green frame structure construction.

• The Journal of Engineering Geology
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• v.18 no.1
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• pp.103-115
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• 2008

The purposes of this study are to understand characteristic water-rock interaction mechanisms of groundwater in the granite area of Geochang and Hapcheon areas, Gyeongnam-do and to clarify the origin of fluoride. The possible water-rock interaction process and the source of fluorine were studied using water chemistry, rock chemistry, mineralogy by XRD, and microtexture analysis by backscattered electron image of the electron microprobe. No clear relationships between F and hardness was found. But the fluorine content increases to some extent with pH and well depth. Preferential alteration due to water-rock interaction took place along edges or cleavage, or margins of biotite. Because biotite is highly subject to alteration in granite aquifer, fluorine in groundwater is originated from the leaching of biotite.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2005.10a
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• pp.97-106
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• 2005

현재 우리나라에서만 연간 약 26만들이 발생되고 있는 농업용 폐비닐은 재생원료로 재활용되어지면 국내외에서 그 용도가 매우 많으나 멀칭용으로 사용되었던 폐비닐은 그 오염도가 워낙 심하여 쉽게 재활용할 수 없는 처지이다. 즉 공급과 수요는 많으나 재생기술의 한계가 병목으로 작용하고 있는 현실이다. 따라서 간단하고 경제적인 방법으로 재활용할 수 있는 습식 및 건식 재생기술의 개발이 계속되어 요구되어 왔다. 강제 세척, 회전분리, 열풍 건조 및 압착성형을 이용한 새로운 간이습식공정을 통하여 멀칭용 농업용 폐비닐을 순도 95% 이상의 탄화 및 열화가 적은 압착 펠렛을 경제적으로 제조할 수 있었다. 이들의 재생 수지는 인장강도 $168.6{\pm}3.9kgf/cm^2$, 파단신을 315.8%, 인장탄성을 $2,551.8{\pm}50.1kgf/cm^2$, 굴곡강도와 굴곡탄성을 $166.7{\pm}7.4kgf/cm^2,\;5,716.2{\pm}242.2kgf/cm^2$ 그리고 충격강도는 $49.2kgf\;cm/cm$을 각각 보여 연질수지로써 기능하기 위한 충분한 성능을 보유하고 있음을 알 수 있었다. 또한 이들의 응용분야 확대를 위하여 fly ash 및 탄산칼슘을 배합하여 이들의 물성변화를 살폈다.

• Korean Journal of Construction Engineering and Management
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• v.9 no.6
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• pp.204-215
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• 2008

Demolition work is a precedence activity that is performed earlier than other remodeling activities. And demolition work is one of the critical path activities. So, demolition work is needed for systematic plan and management. However, contractors of the remodeling project established a rough plan and did not consider recycling wastes, safety of workers and structural stable of building. To improve this problem, a eco-friend process model of remodeling project is needed to be established. The process model is composed of five phases; 1) survey and analysis of general condition of demolition work, 2) prepare documents of demolition work 3) establishing demolition work plan, 4) demolition and inspection, 5) post-demolition management. Especially, demolition documents are based on establishing WBS, selecting the equipment and method, waste management and structure reinforcement. A process model of eco-friend demolition work is developed by using IDEF0 method.

• Korean Journal of Medicinal Crop Science
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• v.9 no.4
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• pp.259-264
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• 2001

This experiment was conducted to examine the seed structure and to investigate the changes of seed vigor and germinability according to storage condition of Astragalus membranaceus. In case of the hard seed, there observed a gap between a testa and an embryo with abnormal shapes of an hilum and its micropyle. Seeds stored at room temperature maintained vitality for 4 months but continued to lose its vitality, while increase the hand seeds ratio as storing time longer. The content of Ca increased in proportion to the length of storing time.

• Journal of Environmental Impact Assessment
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• v.21 no.2
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• pp.297-314
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• 2012

This study investigates the stigma effect of unwelcomed facilities on apartment prices through multiple regressions based on hedonic price method. The areas studied are Sang-gye Jugong 7, 9, 10 apartment complexes. The facilities analyzed are the Chang-dong Electric Subway Depot and the Do-bong Driver's License Agency. The factors studied include the environmental variable (the elapsed time since the announcement of the re-location of these facilities), the view commanding, the distance from Chang-dong Depot, the distance from Do-bong Driver's License Test Course, the distance from neighboring facilities (subway stations, schools, parks and so on), the floor and each dwelling's exclusive space. The data used are 2,822 sales which have been collected since January 1, 2006. The facts found are as follows; first, the view commanding and the distance from the unwelcomed facilities are statistically significant. second, the environmental variable, 'days' turns out to have a positive (+) and a negative (-) significant relationship with the dependent variable, 'price', in period II and period IV respectively. This implies that the stigma effect is real. third, there are significant differences in the influence on the apartment prices among the independent variables according to time. fourth, the stigma effect is estimated as 33,686,920 Korean won in the case of the apartments which have the view commanding and 30,311,844 won in the other case before the global economic crisis. This effect seems to decrease to 22,085,078 won after the crisis. These facts suggest that stigma effects could be considered as one of the benefits in the cost-benefit analysis of Chang-dong Depot re-location project to produce somewhat higher NPV or B/C ratio.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.8 no.6
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• pp.21-33
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• 2005

This study aims to find out actual conditions of environmental-friendly design on outdoor space of housing estate, and then to propose the direction of environmental-friendly design in order to construct the adequate environmental-friendly housing estates. First of all, this study investigated the environmental-friendly design elements on outdoor space of housing estates through literature survey and selected 9 major elements based on the result of the investigation. And then 15 KNHC housing estates were analyzed to find out design actualities of environmental-friendly elements. Major results of this study are as follows. 1) The environmental-friendly design elements were highly adopted in outdoor space of housing estates. The adoption rate of environmental-friendly design elements is 81.0% in average. But, 5 major elements were passively adopted out of 9. 2) According to the comparative analysis of KNHC housing estates, The adoption rate of environmental-friendly design elements was similar in metropolitan housing estates and non-metropolitan housing estates. But, the adoption level of environmental-friendly design element in metropolitan housing estates was higher than one in non-metropolitan. It shows that metropolitan housing estates are more activly adopted in 6 major elements. 3) According to the comparative analysis of design method of KNHC housing estates, The adoption rate and the adoption level of environmental-friendly design elements by turn-key design method and competition design method were higher than by general design. It shows that the housing estates designed by turn-key and competition design method are more activly adopted in 7 major elements.

• Korean Journal of Construction Engineering and Management
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• v.10 no.2
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• pp.26-33
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• 2009

The required level of detail in scheduling depends on the stages in the construction life-cycle. The objective of this study is to provide a Standardized Schedule Model (SSM) with an aim to facilitate the estimating of construction duration in the planning stage. The SSM modularizes work items; establishes relations between preceding and succeeding activities; and calculates approximate construction duration. The estimated duration of the SSM was compared with the detailed duration from the commercial scheduling tool using actual work activities. The difference showed to be ranged between -3.1% and +15%, which demonstrates that the SSM can be feasibly applied to the approximate estimation of construction duration.