• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.1
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• pp.60-70
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• 2010

• 한국도로학회지:도로
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• v.16 no.3
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• pp.27-32
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• 2014

• Magazine of the Korea Concrete Institute
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• v.22 no.5
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• pp.78-82
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• 2010

• 한국도로학회지:도로
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• v.13 no.4
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• pp.45-52
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• 2011

• Geotechnical Engineering
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• v.27 no.11
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• pp.10-20
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• 2011

• KDI Journal of Economic Policy
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• v.10 no.4
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• pp.39-59
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• 1988

우리나라 공기업부문(公企業部門)의 국민경제적(國民經濟的) 비중(比重)이 1970년대에 비하여 1980년대에 더욱 커진 요인(要因)은 정부투자기관(政府投資機關)의 급속한 확장(擴張) 및 성장(成長)에 있었다고 판단된다. 본(本) 연구(硏究)는 정부투자기관(政府投資機關)에서 차지하는 비중(比重)이 막중한 한국전력공사(韓國電力公社)와 한국전기통신공사(韓國電氣通信公社)의 성장요인(成長要因)을 가격요인(價格要因)과 생산성요인(生産性要因)으로 나누어 분석하고, 생산성요인(生産性要因)을 다시 투입요소별(投入要素別)로 분석하여 보았다. 우리나라 최대공익기간업체(最大公益基幹業體)인 이들 두 기관(機關)은 기업(企業)의 성장(成長)을 1979~82년 기간중(期間中)에서와 같이 가격적(價格的) 수단(手段)에 의하기보다는 실질적(實質的) 생산성증가(生産性增加)에 의하여야 할 것이며, 실질생산성(實質生産性) 향상(向上)을 위한 수출상품(輸出商品) 및 투입요소(投入要素)의 합리적(合理的) 재구성(再構成) 및 관련기술개발(關聯技術開發)에 보다 역점(力點)을 두는 경영(經營)을 해나가야 할 것이다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.813-816
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• 2008

The increasing number of vehicles owned by individuals in association with the rising income resulted in an acute shortage of parking spaces. We are not only seeing a serious traffic congestion arising from the vehicles parked in the streets adjacent to apartment buildings, but also the social issues of not being able to properly prepare for the emergency such as breakout of fires. Although remodeling of old apartment buildings are being discussed in measures to these problems, the research of parking space expansion is still insufficient. In a survey on remodeling of old apartment buildings, over 30 percent of those who answered cited the parking space as the most needed improvement and said they preferred direct entry as a way to expand parking space among lateral underground expansion methods. The direct entry is a method in which one directly enters the apartment house from the parking lot through the elevator and it requires extended operation of elevators. However, because there are no established systematic processes for elevator extension and works of such kinds are not common, elevator extension works are being done in an inefficient manner. In this research we reanalyzed the processes in order to present the items to be examined for more efficient elevator extension works, and through interviews of experts in the field, we produced the examination items by process from the perspectives of management and technology. This research will be used as a reference material for elevator extension works associated with expanding underground parking lot of apartment buildings.

• Journal of the Korea Concrete Institute
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• v.16 no.5 s.83
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• pp.645-650
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• 2004

As time passes, bridge structures require extension work on bridge in use from various effects such as social economical, or traffic environment change. When the concrete is poured at the connection of extension work initial curing concrete is influenced by vibration of vehicles that are passing through the old bridge superstructure. Concrete at early curing stage in construction site should be properly protected, enough to have established sufficient integrity to withstand outside vibration, impact etc. Currently there is no standard specification or regulation in our country. In this paper, experimental variables were divided by vibration velocity and time of loading, and concrete compressive strength and bond strength were measured.

• The Korean Journal of Ecology
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• v.14 no.1
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• pp.63-73
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• 1991

Nakdong estuary provides the largest wintering grounds for migrating waterfowls in Korea, and was designated Natural Monument No. 179 in 1966. Nakdong barrage and related construction-projects finished in 1987 to increase freshwater-supply to nearby Pusan metropolitan area and to reclaim the vast intertidal areas for land development. Changes on distribution, primary productivity, and standing crop of Schoenopluctus triqueter, the dominant species in this intertidal flats, were investigated after the construciton, during the 1988-1990, and were compared to those before the construction. Total standing crop. tuber biomass and net primary productivity of S. triqueter increased in 1988 and 1989, but decreased slightly in 1990. Increase of tuber biomass means an increase in available food, thus the carrying capacity, for swans wintering in this area. Habitat environment of this estuary should be protected and managed as a wintering ground for migrating waterfowls, inspite of the construction of the barrage.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.4
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• pp.463-469
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• 2011

BIM(Building Information Modeling) technologies should be applied for the construction life cycle to maximize its efficiency, but the utilization for the construction phase has been significantly lower than that for the planning and design phase. Recently, some of BIM techniques such as 3D design review, 4D schedule management and so on are being introduced for efficient managing to the big national construction projects. In this study, the utilization plans of BIM are presented for the construction phase of civil engineering facilities. The methods of utilization of BIM are discussed for each type of construction, and the techniques applied to the Seoul Subway Lot No. 919 are analyzed for checking the applicability and usability. In particular, a web construction management system based on BIM can help field engineers, headquarters and contractors to use BIM more effectively, and it can be extended to maintenance phase for more efficiencies.