• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.2
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• pp.419-425
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• 2017

Managing mega construction project is a very challenging task due to its large scale and complexity. To deal with the challenge, progress measurement must be estimated reliably and effectively. Many researchers have presented progress measurement methods, but previous studies are limited to single or several types of facilities. Thus, they have difficulties to being applied to mega construction projects that covers multiple facilities. To overcome the limitations, this paper proposes a progress measurement framework considering characteristics of mega construction projects. The framework consists of four phases : development of Work Breakdown Structure, determination of weights of main facilities and sub facilities, and calculation of the integrated progress rate. To validate the proposed approach, a case study of Sejong city in Korea was performed. The results of the case study showed the applicability of the proposed framework and confirmed that it enables to reliably measure progress rate of mega construction projects.

• Journal of the Korea Institute of Building Construction
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• v.10 no.3
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• pp.137-144
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• 2010

As mega-sized and complex building construction projects are on the rise, the importance of project scheduling and control is being highlighted. Project scheduling and control techniques are not yet widely used in Korea, but interest in these has progressively been increasing. Until now, most research projects have mainly focused on scheduling issues, but project progress management is of equal importance. In this research, the current state of project progress management in Korea is analyzed, and ways for improvement are suggested. We begin by analyzing previous research and practical studies in this field, and then survey experts about the current state of project progress management. This study suggests the Building Information Modeling (BIM)base project progress management method for quantitative and qualitative project progress analysis. Currently, BIM is applied to design, construction and maintenance for construction projects. BIM can also contribute to improving accuracy and understanding of the current project situation.

• Korean Journal of Construction Engineering and Management
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• v.6 no.1 s.23
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• pp.212-219
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• 2005

Time management is important in construction management Especially, in the high-rise apartment housing projects, it is very important to expedite the construction progress in order to meet the planned schedule. The objective of this paper is to propose the baseline for the progress rate using work volume and man $\cdot$ hours performed at work activity level. The work volume far each activity is transformed to the weighted value compared to total work volume for the floor Therefore, a progress rate for an activity is calculated by multiplying a weighted value and work volume. A progress rate for a floor and a building can calculated in this manner, respectively.

• The Journal of Korean Medicine
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• v.19 no.1
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• pp.368-384
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• 1998

To know the effects of Gentiana macrophylla(GM) on the immune response, this study was undertaken. GM is one of the well-known oriental medicines for a lomg time used for the treatment of such diseases as arthralgia, headache, hepatitis, SLE, hemiparesis, and so on. To evaluate the effects of GM on immune response in the collagen induced arthritis, phagocytic activity of macrophages, proliferation of T-lymphocytes, secretion of nitric oxide in urine, and production of ROIs, $TNF-{\alpha}$ and nitric oxide in synoviocytes were measured. The results obtained in this study were as follows: 1. During the progress of CIA, the administration of GM enhanced phagocytic activity of macrophages in vivo and vitro. 2. During the progress of CIA, the administration of GM inhibited production of ROIs in synoviocytes. 3. During the progress of CIA, the administration of GM inhibited production of TNF- a in synoviocytes. 4. During the progress of CIA, the administration of GM inhibited proliferation of T lymphocytes. 5. During the progress of CIA, the administration of GM inhibited production of nitric oxide in synoviocytes. 6. During the progress of CIA, the administration of GM inhibited secretion of nitric oxide in urine. According to the above results, during the progress of CIA, it might be considered that GM has a curative effect on rheumatoid arthritis by controling immune response.

• Journal of the Korea Institute of Building Construction
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• v.22 no.3
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• pp.293-303
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• 2022

In construction work, it can be difficult to know the exact number of full-time workers, so the accident rate is calculated using the approximate number of full-time workers. In addition, as the accident rate calculation is performed based on the assumption that the number of accidents is proportional to the approximate number of workers, the reliability of the calculation result may be questionable. This study proposed a new indicator for accident level based on the progress payment and the number of injuries. The accident-progress ratio, which can be calculated by simply dividing the number of injuries by progress payment, can replace the existing accident rate index or be used as an auxiliary indicator of the accident level. The correlation coefficient between the number of injuries and the progress payment was higher than that between the number of injuries and the number of construction workers. In addition, over the past 10 years, the accident rate has been increasing, whereas the accident-progress ratio has showed a decreasing tendency. This might leave room for different interpretations of the annual variation in the accident level in the construction industry.

• Food Industry And Nutrition
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• v.8 no.2
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• pp.24-29
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• 2003

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.157-163
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• 2016

BIM is currently applied in some domestic construction firms, but it is not being actively utilized due to changes in working environments and qualms about new studies. In order to utilize a BIM model in the design phase, process information is needed during construction, but the input system and utilization method of the process information's state are not complete. Therefore, we propose a BIM template for construction progress management that can show basic BIM information as the construction progresses in an easy and convenient way. This method will facilitate the adoption of BIM and enhance the productivity of construction companies. To this end, we designed a progress explorer for step-by-step progress and work schedules, and we generated three-dimensional views and a progress list by applying unit information (primary units, part units, and detail units) of the work breakdown structure (WBS) to the parameters. To use the BIM template, work progress information is input to the BIM modeling objects through Dynamo. We also used Dynamo for quick and easy calculation of the quantity of materials needed for construction work. To test the BIM template, we applied it to an actual project and evaluated its visibility and a progress list. The results showed that the proposed BIM template facilitates progress management of a project and can thus facilitate the adoption of BIM and improve the productivity of construction companies.

• Proceedings of the KIEE Conference
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• 2001.07c
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• pp.1747-1749
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• 2001

This paper simulated discharge progress and partial discharge using needle-plan electrodes system in $SF_6$, studied the distribution of frequency spectrum of the radiated electromagnetic waves using biconical antenna and spectrum analyzer. From results of this study, a method was introduced for measurement and analysis of the radiated electromagnetic waves in accordance with discharge progress in $SF_6$. Besides, according to the consideration of the mutual relation between frequency spectrum of the radiated electromagnetic waves and discharge progress, it was confirmed that detecting partial discharge and estimating discharge progress in $SF_6$ can be possible.

• Korean Journal Plant Pathology
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• v.3 no.4
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• pp.285-290
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• 1987

Septoria brown spot caused by Septoria glycines Hemmi is one of the serious fungal diseases in soybean. Since little has been known about the disease progress in the field, the present study was conducted to determine the factors affecting the disease progress in the soybean plant. Disease severity and pattern of the progress of the Septoria brown spot were different with varieties. Susceptibility of soybean plants increased with increase of plant age and leaf maturity in order from the primary leaf to the newly expanded leaf. It seemed to be related with conidial germination on the leaves. Germination and germtube elongation were more inhibited by the diffusates obtained from upper leaves than those from lower leaves and they were higher in a susceptible variety than in a moderately resistant one.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.32 no.10
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• pp.817-822
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• 2008

Fretting wear is one of the important degradation mechanisms of steam generator tubes in the nuclear power plants. Especially, impact fretting wear occurred between steam generator tubes and tube support plates or anti-vibration bar. Various tests have been carried out to investigate the wear mechanisms and to report the wear coefficients. Those are fruitful to get insight for the wear damage of steam generator tubes; however, most wear researches have concentrated on sliding wear of the steam generator tubes, which may not represent the wear loading modes in real plants. In the present work, impact fretting tests of steam generator tube were carried out. A wear progress model for impact-fretting wear has been investigated and proposed. The proposed wear progress model of impact-fretting wear is as follows; oxide film breaking step at the initial stage, and layer formation step, energy accumulation step and finally particle torn out step which is followed by layer formation in the stable impact-fretting progress. The wear coefficient according to the work-rate model has been also compared with one between tube and support.