• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.11a
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• pp.12-13
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• 2019

Flexible Table Form is being used more frequently at the level of formwork in construction site. However, one of the most common structural frameworks, the RC column-beam structure, is having problems in these factors. To improve this problems, this study developed support devices and proposed installation specifications to enable application of the one-way void slab method to flexible table form. It is expected that the effects of reducing the self-weight of the slab in the floor slab construction using flexible table form.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.11a
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• pp.145-146
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• 2019

In this study, we evaluated the early strength of red clay soil with the polymer aqueous solution at rammed earth construction. In order to satisfy the demolding strength of the formwork be due to the rammed of red clay soil, the polymer aqueous solution was added to evaluate the compressive strength at the early age according to the consolidation level. As a result, a high compressive strength was exhibited with the formulation to which the polymer aqueous solution was added.

• Journal of the Korea Safety Management & Science
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• v.19 no.4
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• pp.53-62
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• 2017

It has come to attention that a risk-assessing organization, that will benchmark a company's safety department, is imperative, following an increase in large-scale SOC-business project, construction of higher-raised buildings, development of underground space; all that have increase accident rates. Having faced problems that arise in firms that demand diversity, complexity and instantaneity, the purpose of the thesis is to arrive at efficient and practical problem-solving means. In order to solve the problems that would surface theoretically during an actual risk assessment, the state of the operation systems of the top five national construction firms having a hazard rate of 0.25 times less than the average rate have been analyzed, while a hierarchal recognition research of the employees who not only function at the operating level but are the practice subjects of a firm, has also been conducted, bringing the main text.

• International conference on construction engineering and project management
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• 2009.05a
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• pp.1000-1014
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• 2009

Research sponsored by the Korean Government investigated the establishment of a risk management process by Korean contractors involved with plant projects in the Middle East. This research effort builds upon the work completed by the Construction Industry Institute (CII), called the International Project Risk Assessment (IPRA) tool and method, and also explored how CII's Project Definition Rating Index (PDRI) could be incorporated to improve project planning by addressing risks and scope development issues. Specific findings and recommendations were developed including the creation of the Contractor Critical Areas of Concern (CCAC) risk screening tool for Korean contractors pursuing Middle East oil and gas projects.

• International conference on construction engineering and project management
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• 2009.05a
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• pp.41-50
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• 2009

Project leadership lifts management to a new level where projects are seen as strategic weapons that help firms to develop competitiveness. For too long, the focus on projects has been on short-term, tool-oriented management. There is a need for fresh understanding of project leadership and appreciation of its importance. A state-of-the-art review of research on leadership in project management is presented. Results of an aspect of a global study on leadership in the construction industry are discussed. The need for project managers to be effectively developed as leaders is underscored.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.38-39
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• 2021

The use of temporary container classrooms has increased in recent years due to the development of the construction industry and renovation or rehabilitation of schools. Therefore, various problems, such as errors during assembling, design and insulation issues, and noise problems, have surfaced during the construction of temporary container classrooms. This study analyzes the causes of assembly errors during the manufacturing and installation processes to improve the quality of temporary container classrooms. Assembly errors are caused by non-level planes and inaccurate cutting during the manufacturing process. In the installation process, poor leveling is a major factor that causes errors during the assembly of temporary container classrooms. These causes result in uneven horizontal or vertical planes and uneven height. To solve these problems, quality improvement measures, such as pin connection, jig, joint coupling, and surface plates are proposed in this study.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.193-200
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• 2024

This research focuses on the extent to which the water efficiency elective items of the LEED certification system adapt to the environmental characteristics of regions with varying climatic conditions. The building industry, is being called upon to promote energy-efficient construction, and the issues surrounding water resources are becoming increasingly severe, underscoring the importance of sustainable water resource management. Based on the hypothesis that, despite its global recognition and widespread adoption, the LEED certification does not always adequately address the environmental realities of all regions, this study analyzed new construction cases certified by LEED in the United States, Japan, and Taiwan from 2019 to February 2024. The analysis revealed regional differences based on water efficiency elective items and certification level trends under different climatic conditions. The findings suggest that the LEED certification system may not fully respond to the environmental situations and water resource issues in all regions, raising concerns about the adaptability of water efficiency items and the potential for similar issues in other evaluation items.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.463-470
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• 2024

Recent wearable devices can measure workers' physical and mental stress levels in the workplace, enabling timely interventions or adjustments to improve safety, well-being, and productivity. However, stress is a subjective metric, response and recovery from stress varies depending on the individual's physical condition. This study is a preliminary study to test whether there are relationships between stress and physical conditions (i.e., body compositions) of individual workers. To find the relationship between various body compositions of the participants and their stress levels, Spearman correlation coefficients and linear regression analysis were conducted. The results showed a significant relationship between workers' stress level and their body composition. This suggests that by utilizing easily measurable body composition, customized stress monitoring for individual workers can be achieved, contributing to the prevention of construction accidents and the creation of a safer construction site.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.63-69
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• 2024

In order to improve the production and supply level of PC components and reduce the impact of risk accidents on production, this article hopes to solve the risk accident problems faced in industrial construction production by introducing mature constraint theories applied in the manufacturing industry. Firstly, this article introduces the widely used constraint theory and DBR method in traditional manufacturing industry; Secondly, based on the constraint theory DBR method, a pull production mechanism is established for the constraint buffering and material delivery of PC components, and risk accidents are defined and estimated; Then calculate and set buffer zones to reduce their risks and ensure the full utilization of bottleneck resources; The ultimate goal is to reduce production scheduling risks and improve production supply levels.

• Journal of the Korea Institute of Building Construction
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• v.4 no.4
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• pp.63-70
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• 2004

The objective of this study is to evaluate the compressive strength of recycled aggregate concrete by the non-destructive testing. Main experimental variables were the replacement level of recycled aggregate and blast-furnace slag, which were divided into two series according to recycled aggregate maximum size. Test results showed that a recycled aggregate had a significant influence on the non-destructive testing results, such as rebound number, Ultrasonic pulse velocity, and frequency. A prediction model of compressive strength considering the replacement level of recycled aggregate was suggested by multi-regression analysis and was compared with test results.