• Computers and Concrete
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• v.28 no.5
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• pp.487-495
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• 2021

The use of prestressed concrete box girder bridges built by segmentally balanced cantilevers has bloomed in the last decades due to its significant structural and construction advantages in complex topographies. In Colombia, this typology is the most common solution for structures with spans ranging of 80-200 m. Despite its popularity, excessive deflections in bridges worldwide evidenced that time-dependent effects were underestimated. This problem has led to the constant updating of the creep and shrinkage models in international code standards. Differences observed between design processes of box girder bridges of the Colombian code and Eurocode, led to the need for a validation of in-service status of these structures. This study analyzes the long-term behavior of the Tablazo bridge with data scarcity. The measured leveling of this structure is compared with a finite-element model that consider the most widely used creep and shrinkage models in the literature. Finally, an adjusted model evidence excessive deflection on the bridge after six years. Monitoring of this bridge typology in Colombia and updating of the current design code is recommended.

• Nuclear Engineering and Technology
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• v.38 no.2
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• pp.119-128
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• 2006

We start to develop a predictable technology for thermal-hydraulic performance of the RMWR core using an advanced numerical simulation technology. As a part of this technology development, we are developing the advanced interface tracking method to improve the conservation of volume of fluid. The present paper describes a part of the development of the twophase flow simulation code TPFIT with the advanced interface tracking method. The numerical results applied to large-scale water-vapor two-phase flow in tight lattice rod bundles are shown and compared with experimental results. In the results of numerical simulation, a tendency of the predicted void fraction distribution in horizontal plane agreed with the measured values obtained by the advanced neutron radiography technique including the bridge formation of the liquid at the position of adjacent fuel rods where an interval is the narrowest.

• Journal of Distribution Science
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• v.11 no.11
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• pp.89-99
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• 2013

Purpose - The purpose of this research was to examine the regulation and distribution channel of second-hand goods in cross-border trade in order to propose methods of protecting consumers through the international standardization of the intensifying second-hand trade and resource recycling. Research design, data, methodology - This study first defines several concepts relevant to research in international second-hand goods. Second, a questionnaire and interviews were conducted with manufacturers of second-hand toner cartridges and automobile parts to identify the current status of export and manufacturing. Results - The study proposes the international standardization of second-hand goods and waste to protect consumers and promote efficient resource recycling. Conclusions - The results of the study reveal that second-hand goods (except automobiles) do not have an HSK code to use for import/export data collection. Though used car exports are declining, used cars are increasing. Collecting data on used car parts is impossible because the buyers purchase and ship the second-hand parts.

• Journal of Aerospace System Engineering
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• v.8 no.2
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• pp.1-6
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• 2014

Currently outer space become more and more congested and contested, according to the increase of satellites, nations and government consortia that operate satellites, and commercial and academic satellite operators. Therefore, international community, including the United Nations has been making a greater effort to adopt non-legally binding international documents capable of regulating space activities for the purpose of the security, safety and long-term sustainability of space activities. These are a draft International Code of Conduct for Outer Space Activities(ICoC) and UN Group of Governmental Experts on Transparency and Confidence-Building Measures in Outer Space Activities(UNGGE).

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.103-104
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• 2022

In Korea, the occurrence and risk of similar fires are high, so setting up fire prevention measures through fire case investigation is considered the most basic measure in securing human safety. In particular, calculation of evacuation capacity in evacuation safety design of buildings is the most important factor that directly affects evacuation safety performance. However domestic standards is not consider about occupant characteristics. also the case of domestic, it has the problem that the law is partially applied when the fire safety design of buildings. Therefore, the purpose of this study is to study the current status and related regulations of the life safety code for the application of high fire risk buildings, and to analyze the difference in evacuation time through Case Study.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.15 no.2
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• pp.61-65
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• 2009

This study was conducted to investigate the safety status of gasket of glass bottle being used for the Bulgogi sauce. The content of plasticizers in the gasket and their migrated amounts into Bulgogi sauce were determined. Among the plasticizers analyzed, only di-isodecyl phthalate (DIDP) was detected in the range between 30.6 and 35.9% from 6 samples. None of the plasticizers was detected in the sauce. Therefore, it can be concluded that the safety status of the gasket tested met the requirement of limit values as prescribed for the migration test of food packaging utensils, containers and packages of the Korea Food Code.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.488-491
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• 2002

This growth if WWW(World Wide Web) with the spread of ADSL provides us with a variety of service that are the extensions of opportunities to get information. a various education methods by remote courses and electronic commerce. Remote Monitoring Server(RMS) that uses internet and WWW is constructed for chip mounter. Hardware base consists of RMS, chip mounter and C/S server. In this paper, we realize the remote management system with monitoring and diagnosis function to efficiently operate chip mounter the one of PCB assembly equipment. The remote management system for chip mounter consists of RMS(Remote Monitoring Server) and C/S server. RMS manages real-time information from chip mounter through TCP/IP. RMS that utilizes real-time information informs user of the actual output the operation status of chip mounter, user of the actual output, the operation status of chip mounter, the trouble code and the trouble description.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.220-223
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• 2008

Many structural engineers believed that RC underground structures like subway system might not be seriously damaged during earthquakes, until the Great Hanshin earthquake(a.k.a Kobe earthquake). But there is only one domestic seismic code of rapid transit system that established by Ministry of Construction & Transportation in 2005. Therefore, to investigate of current status on seismic design and evaluation method of rapid transit system is essential to estimate seismic performance of subway structural systems. In this study, comparing domestic codes and seismic evaluation methods with foreign system is performed.

• Journal of Nutrition and Health
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• v.31 no.7
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• pp.1192-1205
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• 1998

The purpose of this study was to develop a software system for computerized menu planning program by food exchange group. In this research, Powerbuilder 5.0 was used. This study provides food service manegers with more effective manegement system and scientific menu. Software programs developed in this study were summerized as follows : 1) Programs for outputing standard amounts of the exchange food groups fir calories. 2) Programs for inputing the cooking type code, the food code and the food amount of the menu. 3) Programs for outputing distribution of the exchange food groups of the computerized menu. 4) Programs f0r calculating the price of each food and menu. 5) Programs for calculating the nutrient contents of each food and menu. 6) Programs for calculating fatty acids of dietary intake. 7) Programs for calculating PUFA : MUFA : SEA ratio and $\omega$$_{6}$ : $\omega$$_{3}$ ratio and evaluating the status of dietary intake. 8) Programs for inputing the purchasing amount of food. 9) Programs for outputing the menu table. 10) Programs for inputing and modifing the cooking types in the cooking types file. 11) Programs for inputing and modifing the prices in the food prices file.e.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2002.11a
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• pp.177-182
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• 2002

본 논문에서는 컴퓨터 바이러스(이하 바이러스) 및 웜 그리고 트로이목마 등 악성코드의 명명법 차이를 설명하고, 200l년 10월부터 2002년 10월까지, 주요 악성 코드의 기법을 분석하고 전반적인 바이러스 발견 동향 및 향후 전망에 대해 기술하고 향후 악성코드 대응 방법에 관한 연구 방향을 제시하고 논문을 맺는다.