• Journal of the Korean Solar Energy Society
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• v.34 no.5
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• pp.117-126
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• 2014

This study developed a KRESS program designed to find the optimization ratio for new and renewable energy systems and analyze the effects of building energy consumption characteristics on the ratio. In spite of clear differences in predicted energy consumption and energy consumption by the loads among 18 facilities, the current formula for obligatory supply ratios applies a correction coefficient according to the building purposes based on energy consumption per each unit area in medical facilities and thus reflects no energy consumption characteristics according to the building purposes. The optimization ratio for new and renewable energy systems was the same for all facilities when the correction coefficients by the building purposes and new and renewable energy sources were all applied. When the correction coefficients were not applied, however, the optimization ratio varied according to building energy consumption characteristics. The findings raise a need to test the correction coefficients in order to select new and renewable energy systems that take into account energy consumption characteristics by the building purposes and loads and reflect economy, environmental performance, and technology.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 1996.10a
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• pp.258-266
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• 1996

The purpose of this study is to make a reasonable correction in construction stage through exact prediction of long-time differential column shortening that occurs in the high-rise RC building. For this, a self-developed program adopted PCA code is used to predict differential column shortening with sequential loading process. Using this program, the amount of the different column shortening of Amatapura Apartment in Indonesia is predicted and the effect is analyzed. From the result, the major factor affecting the shortening amount in columns is elastic strain and the effect of shrinkage is very small rather than creep. And maximun differential column shortening is appeared near the middle of the building.

• Journal of the Korea Institute of Building Construction
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• v.22 no.6
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• pp.631-640
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• 2022

Recently, construction accidents have occurred due to illegal water addition and insufficient quality control at domestic construction sites. In this study, the void content test method proposed in ASTM C 642 was used to provide a reference guideline for evaluation on the quality control status of cast-in-place structural concrete. For this purpose, simulated structural concrete for coring purpose was prepared in addition to the concrete cylindrical specimens with the same formulation, and the changes in compressive strength, elastic modulus, and void content related to coring were evaluated. According to experimental results, the compressive strength and modulus of elasticity were reduced by coring, which was associated with the generation of microcracks during coring. With respect to void content, the difference in void content between the cylindrical specimen and the cored specimen was up to 1.69%. If this value is used as a correction factor, it is possible to estimate the real void content of the cast-in-place structural concrete. By comparing this with the void content obtained from cylindrical concrete specimens, it is possible to evaluate the quality control status and amount of illegal water addition on the structural concrete.

• Journal of Korea Society of Digital Industry and Information Management
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• v.14 no.3
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• pp.45-53
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• 2018

The Personal Information Protection Act has been revised continuously since its establishment, and as a way to secure stability properly, the guidelines as well as enforcement ordinances and regulations have been changed, too. It seems that people's recognition and awareness of private information have already evolved to a certain level that is regarded to be fairly high. However, no one can exactly imagine how much ripple effect scrapping discarded paper regarded simply as waste material which is often and easily practiced in our everyday lives exerts and how many socially significant events it may arouse in our lives. Private information is produced, operated, preserved, utilized, distributed within the frame of law unidentified, and then discarded with a particular purpose. While going through a series of processes, each piece of that private information comes to be reproduced melting a lot of information. It is used and also changed beneficially sometimes to richen our lives or as basic material for welfare. Meanwhile, its importance is decided by its weight or mass and then often gets discarded after all. It means that the process of disuse is being done in a way to arouse the possibility of invasion of personal rights and also the second and third and also more exposure of private information. Therefore, approaching the meaning of automation politically, this study aims to suggest how to secure stability in the process of discarding private information in terms of logical automation.