• Korean Journal of Construction Engineering and Management
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• v.15 no.1
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• pp.62-69
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• 2014

Since a government policy greatly affects markets and firms, an evaluation on government's policies is recognized as a critical issue. In Korea, two major policy plans on CM(Construction Management) include the Construction Industry Promotion Plan and the Construction Technology Promotion Plan from which Government's CM policies can be understood. The objective of the study is to analyze and discuss CM firm's perception and evaluation toward the Government's CM policies of the two plans based on the Gap analysis. The paper identified that the CM firms perceive that the Government's CM policies properly deal with key issues of the industry. However, they evaluate that the execution of the policies has been overall under-performed. As a way forward, the Government needs to improve on the execution plan and performance measurement rather than to develop new policy agenda.

• Korean Journal of Construction Engineering and Management
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• v.15 no.5
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• pp.71-81
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• 2014

As domestic construction investment has been gradually reduced, the issue of expanding overseas CM market has increased. Strengthening CM capability from the view point of project life-cycle is required in overseas CM market. However, current regulations institutionally force public CM services to focus on the construction phase. Therefore, Korean CM firms can hardly have the opportunities for accumulating technical competitiveness especially for pre-construction phase. Result of this study shows that the total efforts in terms of man-hours for the construction phase is found to be more than 78 percent in domestic public CM projects. In this context, this study proposes the policies and tasks for improving 'rigid man-hour placement', 'unreasonable CM fee standards', 'CM firm selection method', 'unreasonable business scope decision', and 'evaluation of owner's project management capability' in order to improve domestic CM Industry as well as to expand overseas CM market successfully.

• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.3-11
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• 2016

CM at Risk has been introduced in Korea to keep up with the global standards of construction management and provide a higher quality of cm service in line with a rapid change of the construction industry recently. However, it is widely considered that more time would required to settle down the system due to a lack of understanding towards CM at Risk, shortage of reliability and low capability to manage and undertake CM at Risk. Therefore, this research is analyzed problems of contract types, open book policies, and contract conditions of 33 numbers of projects undertaken by a bespoke domestic construction management firm in this research. Moreover, this research is suggested a method to establish an open book policy of CM at Risk aiming a better customers satisfaction through staff training, simplifying and improving a payment system, and a way to settle down an open book policy by improving a performance management system on site. It's expected that this research will contribute to a more competitive system with more dominating the market and a differentiation of the service so as clients to rely more on the CM at Risk.

• Construction Engineering and Management
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• v.4 no.4 s.16
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• pp.47-49
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• 2003

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.197-197
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• 2020

기후변화 연구의 주요 요소 중 하나는 온도, 강수량 및 증발과 같은 기후 요인의 변화를 연구하는 것이다. General Circulation Model(GCM)은 다양한 기후 요인의 변화를 연구하는 데 일반적으로 사용되고 있다. Coupled Model Intercomparison Project(CMIP)는 전 세계의 30여 개 이상의 기관에서 개발한 GCM의 모의 결과를 연구 및 공유하기 위해 개발되었다. 기후 연구에서 대표적으로 사용하고 있는 CMIP5의 GCM은 미래 시나리오인 Representative Concentration Pathway(RCP)를 기반으로 전망 기간의 기후요소를 예측한다. 현재 개발하고 있는 CMIP6의 미래 시나리오인 Shared Socioeconomic Pathways(SSP)는 인구, 경제개발, 생태계, 자원, 제도 및 사회적 요인에 대한 미래의 사회적, 경제적 변화에 따른 기후변화에 대한 대응을 포함하고 있으며, CMIP6의 미래 시나리오는 사회적 및 경제적 결합을 통해 기후변화에 대한 정책 영향에 대한 증진된 결과를 도출할 것으로 예측하고 있다. 따라서 본 연구는 CMIP5의 INM-CM4와 CMIP6의 INM-CM5를 사용하여 대한민국의 과거 기간(1970-2005)의 월 강수량에 대한 성능을 비교하였다. 격자형 자료인 GCM을 Inverse distance weight를 사용하여 대한민국 22개 관측소로 거리 보간을 수행하였으며, 편이보정 방법으로는 분위사상법(Quantile mapping) 방법 중 Smoothing Spline 방법을 사용하여 관측소와의 오차를 수정하였다. 산정된 강수량을 토대로 6개의 평가지표(NRMSE, Pbias, NSE, PRCP100, PRCP200, PRCP300)를 사용하여 GCM의 성능을 평가하여 INM-CM4와 INM-CM5의 성능을 비교하였다.

• Journal of the Korea Institute of Building Construction
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• v.18 no.4
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• pp.375-384
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• 2018

Due to the downturn in the local construction business, entry into the overseas markets has been regarded as one of the core tasks of the building sector and the government. Thus, entry into overseas markets, not only by large and middle-standing enterprises, but also by small and medium sized enterprises, has recently become a major construction policy. Therefore, this study identified and evaluated overseas construction support policies in the field of construction engineering, ranked them as the policies for developing market development funds, fostering and educating expert workers, and supporting the provision of information on winning orders. Through these policy assessment results, the study proposed improvement measures from the government and from the business side. As for the government viewpoint, a measure of providing information suited to engineers in design companies, project manager (PM), construction manager (CM), a measure of producing skillful workers through the expansion of education support policies, and the promotion of specialized overseas workforce in the construction engineering sector were proposed. In the construction engineering industry, this study suggested measures for securing global expert manpower, sharing performance of overseas construction market development project, strengthening construction project management capacity, and strengthening risk management.

• Korean Journal of Construction Engineering and Management
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• v.14 no.4
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• pp.108-117
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• 2013

The domestic CM business market has continued to grow, but its size is relatively small yet in comparison with the total size of the domestic construction industry. Evaluation of CM projects was conducted through questionnaire surveys. Both clients and CM firms showed positive satisfaction levels. Nevertheless, the clients' satisfaction levels were relatively low in safety management, cost management, and document and information management. Superior areas of CM tasks were time management and recovery scheduling, quality control and technical instruction, and design value engineering. On the other hand, inferior areas of CM tasks were claim analysis and dispute resolution, cost estimation, and life cycle costing. Both entities have agreed with the positive effects of CM involvement in terms of cost saving, time reduction, quality improvement, and safety incidents prevention to at least 0~5% extent.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.498-498
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• 2023

정부와 지자체는 기후변화로 인한 홍수 피해를 저감하고자 내수배제 용량 증대, 건전한 물환경 조성 등 다양한 방향의 정책들을 제시하고 있다. 각 지자체 별로 다양한 홍수 대응 정책들을 반영하고 있지만, 2022년 집중호우에 의한 도심지역 침수 피해 사례와 같이 기후변화로 인하여 증가된 홍수량에 대한 적절한 대비를 못하고 있다. 따라서 지자체는 현재의 홍수 대응 정책들과 더불어 추가적인 홍수 대응 정책을 시행하여야 하며, 지속가능한 개발을 고려한 유역의 건전한 물순환을 유지해야 한다. 본 연구에서는 토지피복 등 유역의 특성을 고려하여 실행 가능한 홍수 정책들의 대응 효과를 분석하고, 기후변화 시나리오를 반영한 미래 빈도분석 결과를 반영하여 최적의 홍수 대응 정책 대안을 제시하고자 한다. 연구에서 선정한 홍수 대응 정책은 우수관거 용량을 증대시키는 관거 교체 정책, 지속가능한 저영향개발 기법을 적용한 투수성 포장과 옥상녹화 정책을 선정하였다. 미래 강우 시나리오는 3개의 CMIP6 GCM모형(ACCESS-CM2, CanESM5, GFDL-ESM4)과 2개의 SSP-RCP 시나리오(SSP1-26, SSP5-85)를 사용하였다. 홍수 저감 효과는 도시유출해석모형인 SWMM 모형으로 분석하였다. 또한, 정책 이행에 발생하는 공사와 운영 비용을 산정하여 경제적 편익 분석을 실시하였다. 분석 결과, 투수성 포장과 우수관거 용량 확대 정책을 반영하는 정책 시나리오가 가장 경제적인 홍수 저감 효과를 가져오는 것으로 분석되었다. 본 연구의 정책별 경제적 비용과 홍수 저감 효과 분석은 기후변화에 대비한 도시유역의 홍수 대응 정책을 평가하고 우선순위를 선정하는데 있어 기여 할 수 있을 것으로 기대된다.

• Journal of Environmental Impact Assessment
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• v.32 no.3
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• pp.157-165
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• 2023

In Korea, a major contaminant of farmland soils in the vicinity of abandoned mines is arsenic, for which the general soil reclamation method is contaminated soil stabilization and cover the stabilized soil with clean soil at a thickness of 40 cm. In a previous pot experiment study we confirmed the feasibility of a lower thickness (20 cm) of covering soil for such reclamation in abandoned coal mines, where arsenic contamination levels are generally lower than in metal mines. In this subsequent study a field experiment including rice plant cultivation in field test plots was conducted. For over 4 months, the transfer of arsenic from the contaminated soil to the unpolished rice grains was reduced by 44% when a clean soil covering with a thickness of 20 cm was applied. The maximum decrease (56%) was shown when the stabilization process was performed before the covering. These results reveal a lower thickness of clean soil covering has a high feasibility and it can increase cost-efficiency in the reclamation of an abandoned coal mine.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.281-291
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• 2017

This study aimed to assess detection rate applying the mammographic imaging methods. The evaluation of the shape and margin of tumor was conducted by score oriented to 180 patients who had undergone FFDM, DBT and BMRI scans among breast cancer patients, and the number of calcification was classified by size. There was no significant difference between DBT and BMRI for tumors larger than 1 cm in low-density breasts and for tumors larger than 2 cm in high-density breasts. Moreover, as for the detection rate of number of fine calcification, the highest rate was observed in FFDM followed by DBT and BMRI in the order named regardless of size. In conclusion, DBT was able to be detected even without BMRI if the mass was larger than 1 cm in the low-density breast and larger than 2 cm in the high-density breast. The detection rate of calcification turned out to be the highest in FFDM followed by DBT regardless of size, and calcification was not observed by BMRI. The appropriate use of FFDM, DBT and BMRI with respect to mass tumor will contribute to serving as a guide to examination methods of reducing burden of patients.