• 교육녹색환경연구
• /
• 제11권3호
• /
• pp.46-54
• /
• 2012

The accuracy of cost estimation at an early stage in school building project is one of the critical factors for successful completion. So various of techniques are developed to predict the construction cost accurately and expeditely. Among the techniques, Support Vector Machine(SVM) has an excellent ability for generalization performance. Therefore, the purpose of this study is to construct the prediction model for construction cost of educational building project using support vector machine technique. And to verify the accuracy of prediction model for construction cost. The performance data used in this study are 217 school building project cost which have been completed from 2004 to 2007 in Gyeonggi-Do, Korea. The result shows that average error rate was 7.48% for SVM prediction model. So using SVM model on predicting construction cost of educational building project will be a considerably effective way at the early project stage.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2020년도 가을 학술논문 발표대회
• /
• pp.113-114
• /
• 2020

During the construction work, many deaths and injuries have occurred in the formwork. This study aims to analyze the perceptions of construction workers about the disaster of formwork collapse. In this study, the IPA(Importance-Performance Analysis) technique was used to analyze the perception of construction workers and derive urgent factors for improvement. As a result of IPA analysis, the fourth quadrant factor needed to be improved first, and the second quadrant factor needed effort distribution. Therefore, it is judged that this study can be used as basic data for safety management and disaster prevention activities.

• 한국산학기술학회논문지
• /
• 제14권11호
• /
• pp.5993-5999
• /
• 2013

본 논문은 공공기관별로 발주 계약되는 모든 설계 감리 건설사업관리의 건설기술용역을 건설분야 및 사업단계로 구분하여 관리할 수 있도록 정보관리항목을 마련하고 사용주체별 업무 프로세스 개선방안을 제시하였다. 또한, 개선된 프로세스를 기반으로 용역책임자와 공공기관 담당자간에 용역실적정보를 등록 검토 승인할 수 있도록 건설기술용역 실적관리시스템을 개발하였다. 그 결과, 건설기술 용역업체의 기술인력 보유상황 및 기술인력 업무중첩도와 회사실적 등이 투명하게 관리되며, 용역업체에 대한 객관적이고 신뢰성있는 용역실적정보를 제공함으로서 향후 적정 용역업자 선정시 참고자료로 활용이 가능하며, 사업수행능력평가서 제출시 실적자료를 제출할 필요없이 온라인으로 확인이 가능하다.

• 한국건축시공학회지
• /
• 제10권1호
• /
• pp.91-99
• /
• 2010

본 연구의 목적은 6시그마 경영기법을 적용하여 건설회사의 기술 자료와 정보를 축적, 관리하는 기술정보시스템(TIMS: Technology Information Management System)의 활용 증대방안을 도출하는 것이다. 연구에 적용된 방법론은 6시그마 기법 중 DMAIC방법론을 이용하였다. 연구수행결과 다음과 같은 결론을 얻을 수 있었다. 건설기술정보의 성격을 분석하였으며, 기술정보를 관리하는 시스템의 활용율을 증대하기 위해서는 고객만족을 위한 기술정보 활용도 분석에 대한 프로세스가 필요하며, 정기적인 수요조사와 개인별 맞춤정보서비스의 제공, 지속적인 교육과 홍보의 실시, 각종 기술정보의 축적과 분석, 가공을 통한 컨텐츠의 확충이 필요하다.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2004년도 제5회 정기학술발표대회 논문집
• /
• pp.427-432
• /
• 2004

최근 건설시장의 경쟁이 치열해지고, 건설생산성을 향상시키는 것이 기업의 경쟁력 확보라는 인식이 높아짐에 따라 건설업에서도 생산성과 효율성에 대한 관심의 풍요도가 증대되고 있다. 본 연구에서는 기존의 생산성 측정 방식을 활용한 사례조사를 통해 생산성을 측정하고 측정된 내용에 근거하여 작업개선사항을 제시하였다. 제안된 개선사항은 시뮬레이션(simulation)기법을 동해 검증하였다. 본 논문의 의의는 생산성 측정을 분석하는데 있어 시뮬레이션 기법이 현장여건을 모두 고려한 최적의 대안은 아니지만 현장관리자로 하여금 상황에 적합한 최적의 작업방식을 선택하게하고 생산량을 예측할 수 있는 방법을 제시했다는 점에 있다.

• 한국컴퓨터정보학회논문지
• /
• 제24권8호
• /
• pp.67-76
• /
• 2019

Along with the diversification of digital content services using wired/wireless networks, the market for the construction of base systems is growing rapidly. Cloud computing services are recognized for a reasonable cost of service and superior system operations. Cloud computing is convenient as far as system construction and maintenance are concerned; however, owing to the security risks associated with the system construction of actual cloud computing service, the ICT(Information and Communications Technologies) market is lacking regardless of its many advantages. In this paper, we conducted an experiment on a cloud computing security enhancement model to strengthen the security aspect of cloud computing and provide convenient services to the users. The objective of this study is to provide secure services for system operation and management while providing convenient services to the users. For secure and convenient cloud computing, a single sign-on (SSO) technique and a system access control technique are proposed. For user authentication using SSO, a security level is established for each user to facilitate the access to the system, thereby designing the system in such a manner that the rights to access resources of the accessed system are not abused. Furthermore, using a user authentication ticket, various systems can be accessed without a reauthorization process. Applying the security technique to protect the entire process of requesting, issuing, and using a ticket against external security threats, the proposed technique facilitates secure cloud computing service.

• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.324-327
• /
• 2015

Scaffold is the most commonly used equipment in various types of construction works. Since various types of construction works use the same scaffold equipment, it becomes more difficult to be controlled and managed, thus resulting hazard frequently. According to the information announced in July 2012 by Council of Labor Affairs Executive Yan, the site collapse or incomplete anti-falling protection has led the site to accident frequently, and this is the main reason that causes construction industry occupational disasters. The labor death occupational hazard ratio rises up to 13% in scaffold activity, and the Council of Labor Affairs Executive Yan has showed that the death ratio is higher when using the scaffold in construction site, the total number of death has reached to 139 from 2005 to 2010. In order to ensure the safety of scaffold user, this study tends to build a wireless sensor monitoring system to detect the reliability and safety of the scaffold. The wireless sensor technique applies in this study is different with the traditional monitoring technique which is limited with wired monitoring. Wireless sensor technique does not need wire, it just needs to consider the power supply for establishing the network and receiving stable information, and it can become a monitoring system. In addition, this study also integrates strain gauge technique in this scaffold monitoring system, to develop a real-time monitoring data transfer mechanism and replace the traditional wired single project monitoring equipment. This study hopes to build a scaffold collapse monitoring system to effectively monitor the safety of the scaffold as well as provide the timesaving installation, low-cost and portable features.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
• /
• pp.49-51
• /
• 2012

This study was conducted as a part of database construction for development of CO₂ assessment system for concrete to assess CO₂ emissions and analyze characteristics of blast furnace slag manufactured in Korea through life cycle assessment method. For this, life cycle CO₂ emissions assessment technique for construction materials was examined. The entire manufacturing process for blast furnace slag was analyzed on blast furnace slag manufacturer in Korea for application of assessment technique. Life cycle CO₂ assessment was performed on blast furnace slag after classifying assessment process into raw material production step, raw material transportation step and construction material manufacture step.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 추계학술대회 논문집
• /
• pp.941-946
• /
• 2008

D&B method in tunnel construction requires accurate and rapid measurement of the ground movement, which of essential for feedback analysis. Recently, survey technique adapting IT is getting more and more emphasized in the field of construction and tunnel survey also follow the same trend. Case study and adaptability of IT technique for tunnel survey will be discussed in this study. The application of laserscannig method in the field of tunnel construction was reported in several advanced country including Austria and Japan. Survey for the crown and shoulder movements by IT survey method was conducted and the results were compared to those do the conventional method. The pipe-roof, grouting, ring-cut are installed in the this site to prevent expected large ground settlement. The result show that laserscanner system is prefered rather than conventional method in that better understanding for the displacement condition and origin condition was liable by the lasersacnnig method. IT survey solution makes if possible to execute more economic and safe construction.

• Journal of Construction Engineering and Project Management
• /
• 제5권1호
• /
• pp.40-46
• /
• 2015

This study presents the results of our analysis and recommendations for process and productivity improvements. The project studied consists of a 5-story research building, with a structure of steel frames supporting concrete slabs. The observations focused on the analysis of the overall erection and framing process. The methods used for the analysis consisted in intensive visits on site, where construction processes were observed in term of resources, activities, durations, materials' handling procedures, and technology used. Back to the office, authors used the information captured to model the different trades' activities, using work sampling and 5-minute rating technique. The work sampling provides insight into the activity, hence allowing for process improvements. The productivity of various trades is strongly dependent on the organization of the work process and work site conditions. Improving the productivity of the entire project or company is not possible until everyone is committed to improvement.