• Journal of the Korean Society for Railway
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• v.14 no.6
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• pp.507-514
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• 2011

Recently, we developed a new subway train with many cooperative companies. The main controller of the subway train is Control and Monitoring System (TCMS), so we conducted requirement analysis of TCMS considering system performance, easy maintenance and service oriented flexibility. Hence, we adopted new bus architecture and QNX as a Real-time Operating System (RTOS) and developed hardware systems. The functions of TCMS are employed into two computers, service computer and control/monitor computer, to increase on their performance and to yield easy maintenance and to satisfy customer needs. The TCMS controls and monitors control devices equipped in the train through various protocols which are implemented in hardware. In order to evaluate the performance of the system and to satisfy reliability, various experiments including EMC/ECI were performed. Now the TCMS is installed on the newly developed train and is under performance evaluation through test driving.

• Journal of the Korea Safety Management & Science
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• v.13 no.1
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• pp.11-22
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• 2011

본 논문에서는 자기효능감(Self-efficacy belief)과 산업재해의 관계에 대한 분석을 수행하였다. 먼저 연구의 예비 단계에서는 크게 세 그룹 즉, 현장의 작업자, 현장 및 안전관련 자문업체에 근무하는 안전 관리자, 그리고 산업안전에 관계되는 정부기관 종사자 등을 대상으로 집중면접(Focus group interview)을 실시하였고, 이 집중면접의 결과를 근거로 하여 연구의 본 단계에서 적용될 설문지를 개발하였다. 본 설문지는 산업안전, 산업안전교육프로그램의 평가, 산업안전교육을 향상시키기 위한 방법, 자기만족, 스트레스, 산업재해율, 그리고 인구사회학적요인관련 정보 등과 관련되는 효능감을 평가 하도록 설계되었고, 총 917명(현장작업자: 542명, 안전 관리자: 210명, 정부기관종사자: 165명)에게 설문조사를 시행하였다. 주요 결과를 정리하면 다음과 같다. 첫째, 작업자 그룹의 경우에 안전관련 효능감과 관련한 세 가지 요인(자기관리, 사회적 지원, 환경관리)은 해당 회사의 산업재해율과 부(negative)의 상관관계를 갖는 것으로 나타났다. 둘째, 안전효능감이 높은 현장 작업자는 낮은 현장작업자들과 비교하여 안전관련 수칙을 더 잘 지키고, 자기 인생에 대한 만족도가 더 높으며, 스트레스의 정도가 더 낮은 것으로 나타났다. 셋째, 안전관리자의 경우에 안전효능감은 안전교육 프로그램의 효율성과 정(positive)의 상관관계를 그리고 해당회사의 산업재해율과는 부(negative)의 상관관계를 갖는 것으로 나타났다. 넷째, 정부기관 종사자의 경우에는 경력이 길고 높은 지위에 있을수록 산업안전관리관련 안전효능감이 높은 것으로 나타났다.

• Korean Journal of Construction Engineering and Management
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• v.10 no.5
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• pp.16-27
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• 2009

Recently construction companies expand position for apartment house in construction market because of house supply rate increase and its amount. In addition, because the focus of house sale market has moved to customer from supplier, the importance of defect management is being issued currently. However, current apartment defect management is not satisfied with customer's demand for the lack of business process management, management organization, information feedback, and readiness for defect in construction phase. To solve this problem, this study proposed business process management improvement model for defect management. Proposed improvement model make information feedback, defect management business quality improvement, and improper process improvement through integrating defect management and quality management. It is expected to contribute to customer's satisfaction improvement and reliance improvement for construction companies.

• Resources Recycling
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• v.12 no.3
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• pp.46-53
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• 2003

Recycling of aluminum dross is an important issue in the secondary aluminum industries. In this study, aluminum dross generated in the domestic secondary aluminum industry was processed to use it as raw material for producing alumina refractories. Sample dross was classified according to its size. The dross smaller than 1 mm was leached with sodium hydroxide solution to extract the remained aluminum from the dross into the solution. and then aluminum hydroxide precipitate was recovered from the leach liquor. The waste residue in the leaching was washed, dried and roasted. Most remained metallic components in the residue was changed into oxide through the processes. The roasted dross was made into alumina castable refractories by mixing with aggregates and a binder. Bending strength of the tested castable specimen was over $25\;kg/\textrm{m}^2$ and compressive strength over $80\;kg/\textrm{cm}^2$, which satisfied the Korean Standard value respectively. From the results, it was suggested that this process could be applicable to recycling of aluminum dross.

• The Korean Journal of Food And Nutrition
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• v.27 no.1
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• pp.136-146
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• 2014

A study was performed on the consumption of prepackaged meals (Dosirak) sold by food service providers through Importance-Satisfaction Analysis (ISA) to determine the factors that consumers seek in quality Dosirak. According to the analysis, food service providers need to concentrate on food freshness and temperature while maintaining food taste. As for food packaging, consumers were found to prefer microwaveable plastic containers the most (29.3%). Nonetheless, they found that packaging needed improvements in securing food content during transportation and in food labeling, especially for expiration dates. The study also investigated which factors, including menu selection and advertising, affected the sales of food service provider Dosirak the most. The most important factor was determined to be price. Regarding menu selection, the quality of food seasoning and ingredients, daily specials and the variety of combination sets were found to be important. Availability of delivery (3.83/5.00), advance ordering (3.82/5.00) and discounts (3.75/5.00) were important factors in advertising. The conclusions of the study point to a consumer base that recognizes the ease and benefits of Dosirak but desires high quality food items at low cost. To expand the consumer base, food service providers must continually develop new menu items that satisfy consumer tastes and trends, maintain sanitary conditions and improve food labelling.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.821-829
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• 2000

Over the past decade, the topic of work breakdown structure (WBS) has gained an increasing amount of attention from information technology professionals as an effective tool for managing the complexity of a large-scale information system development project. It is a method for planning and controlling a large-scale information system development. A WBS provides the basis for project organization, cost estimation, task scheduling, and contract management. Based on the authors' practical experience, this paper discusses how to establish a specific WBS and some considerations for developing a well-defined WBS. The model of WBS suggested in this study will provide useful insight and guidelines for establishing the spec-ific WBS for a large-scale information systems development.

• Journal of the Korean Association of Geographic Information Studies
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• v.12 no.3
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• pp.1-12
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• 2009

This study aims to analyze the existing problem of geo-spatial information maintenance and then, show maintenance strategies suitable for new integrated environments. We look for AS-IS which is provider-centered, top-down, and also drive implications from analyzing oversea best practice. For analyzing of geo-spatial maintenance pattern, we polled about 20 local governments and private enterprise to find out AS-IS of geo-spatial information and result in maintenance pattern and component. From this, we suggest 4 kinds of strategies. This study shows the strategy not only which decide the question about the problem of existing geo-spatial maintenance but which find a way of combining and utilizing all geo-spatial information which is 8 criteria basic geographical information. This is a win-win program of all organization which produce, construct, make full use of national geo-spatial information.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.5
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• pp.860-867
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• 2007

Digital Contents are increasing the modification of the contents by individual user and the modified or copied contents are simply distributed though the ultrahigh speed internet and the negative pervasive effect on the contents market is increasing. The solutions for copyright protection from illegally distributing contents are developing by various standardization groups and contents manufacturers and its commercia use is partly practiced. The MPEG was developing the IPMP technique to apply existed MPEG standards as a way of digital contents protection. However, as these IPMP techniques did not provide a satisfactory function for contents protection, the DMP standard was suggested as an alternative plan. In this paper, the system is designed and materialized to apply the TooIPack concept of DMP which ensure the interoperability of DRM system. With this paper, it is expected that the practical use and the possibility of the DMP standard in the DRM market would be verified and DMP standard may presents as a reference model for more systematic standardization operations.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.393-399
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• 2019

This study is to compare and analyze three leading delivery applications in Korea. As using of mobile Phone increases, the frequency of delivery applications is increasing. Nevertheless, there are still problems in usabilities. So the usability of three Applications were analyzed through an in-depth interview. Factors affecting user experience's satisfaction were identified through a 7-point scale based on Honeycomb, and the results were similar with in-depth interview, indicating what and why users overwhelmingly preferred delivery applications. This study is intended to enhance usability of all applications by analyzing the user experience of delivery applications, deriving the strengths of each vendor, applying them to all applications, and further applying the new technological ideas gained from interviews.

• Resources Recycling
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• v.30 no.5
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• pp.17-24
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• 2021

Natural aggregate regular exploitation has led to environmental and resource depletion issues; consequently, construction waste has become an important raw material in the supply of aggregate smoothly. The recycled aggregate produced in the most of recycled aggregate processing company in Korea has a high adhesion ratio of cement paste and mortar, which affects the water absorption ratio and density. Therefore, the quality of recycled aggregate needs to be improved. In this study, we improved the quality of recycled aggregate through the use of a multistage separation ball mill. This ball mill has a sieve which protects the ball mix and improves the motion. Products produced by using multistage separation ball mill were compared with various quality standard for utilization as recycle aggregate. Finally, we confirmed that the multistage separation ball mill can efficiently separate cement paste and mortar from natural aggregate and that it is suitable for the production of recycled aggregates.