• Journal of the Korea institute for structural maintenance and inspection
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• v.11 no.6
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• pp.159-168
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• 2007

The problem of determination of axial force in continuous welded rail(CWR) has attracted a number of railroad engineers due to its practical importance in prevention of accidents related to buckling and pull apart. In this paper, we investigated the application of the beam-column theory to presume the axial force in CWR and proposed the development process of the prediction equation and model to presume the axial force in CWR.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.527-530
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• 2006

오늘날 많은 기업들이 납기 단축, 비용 절감 및 효율적인 프로세스 관리 등을 위해 소프트웨어 프로세스 모델 및 표준을 도입하고 있다. 이러한 표준들은 유지보수 과정에서 빈번하게 발생하는 장애를 혁신적으로 감소시켜 안정적 서비스 제공을 한다. 본 논문에서는 CMMI에서 요구되는 프로세스를 좀 더 자세히 체계화하여 CMMI 인증을 받은 금융회사의 장애분석을 통하여 장애의 원인들을 파악하고 이에 대한 개선된 프로세스를 제안하고자 한다.

• Korean Chemical Engineering Research
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• v.55 no.3
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• pp.322-331
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• 2017

District heating was first introduced in Korea in 1985. As the service life of the underground thermal piping network has increased for more than 30 years, the maintenance of the underground thermal pipe has become an important issue. A variety of complex technologies are required for periodic inspection and operation management for the maintenance of the aged thermal piping network. Especially, it is required to develop a model that can be used for decision making in order to derive optimal maintenance and replacement point from the economic viewpoint in the field. In this study, the analysis was carried out based on the repair history and accident data at the operation of the thermal pipe network of five districts in the Korea District Heating Corporation. A failure probability model was developed by introducing statistical techniques of qualitative analysis and binomial logistic regression analysis. As a result of qualitative analysis of maintenance history and accident data, the most important cause of pipeline damage was construction erosion, corrosion of pipe and bad material accounted for about 82%. In the statistical model analysis, by setting the separation point of the classification to 0.25, the accuracy of the thermal pipe breakage and non-breakage classification improved to 73.5%. In order to establish the failure probability model, the fitness of the model was verified through the Hosmer and Lemeshow test, the independent test of the independent variables, and the Chi-Square test of the model. According to the results of analysis of the risk of thermal pipe network damage, the highest probability of failure was analyzed as the thermal pipeline constructed by the F construction company in the reducer pipe of less than 250mm, which is more than 10 years on the Seoul area motorway in winter. The results of this study can be used to prioritize maintenance, preventive inspection, and replacement of thermal piping systems. In addition, it will be possible to reduce the frequency of thermal pipeline damage and to use it more aggressively to manage thermal piping network by establishing and coping with accident prevention plan in advance such as inspection and maintenance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.3
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• pp.447-451
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• 2017

This study proposes a new model of tourism destination management based on the tourism management program using information and communication technology provided by LBS. The personalized tourist information service can enhance the satisfaction of tourists. Sustainability can be expanded through management based on the capacity of the tourism destination. Increased satisfaction leads to more diverse tourism activities. Various tourism activities increase the consumption expenditure, which satisfies the local tourism destination management purpose. The tourism destination management plan of the central and local governments is a comprehensive system in which detailed policy support plans are formulated from the perspective of the three requirements for sustainability-economic, socio-cultural, and environmental-and concerned parties are connected and resources are supported through detailed processes in which the sources of disparities in accessibility are identified and the roles are delegated at the national, community, and regional levels.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.4
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• pp.220-227
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• 2021

PCT (Power Cable Tunnel) and UT (Utility Tunnel), which are non-transport underground infrastructures, are mostly RC (Reinforced Concrete) structures, and their durability decreases due to the deterioration caused by carbonation over time. In particular, since the rate of carbonation varies by use and region, a predictive model based on actual carbonation data is required for individual maintenance. In this study, a carbonation prediction model was developed for non-transport underground infrastructures, such as PCT and UT. A carbonation prediction model was developed using multiple regression analysis and deep neural network techniques based on the actual data obtained from a safety inspection. The structures, region, measurement location, construction method, measurement member, and concrete strength were selected as independent variables to determine the dependent variable carbonation rate coefficient in multiple regression analysis. The adjusted coefficient of determination (Ra2) of the multiple regression model was found to be 0.67. The coefficient of determination (R2) of the model for predicting the carbonation of non-transport underground infrastructures using a deep neural network was 0.82, which was superior to the comparative prediction model. These results are expected to help determine the optimal timing for repair on carbonation and preventive maintenance methodology for PCT and UT.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.4
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• pp.913-921
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• 2012

On the strength of the rapid development and propagation of U-healthcare service, the service technologies are full of important changes. However, U-healthcare service has security problem that patient's biometric information can be easily exposed to the third party without service users' consent. This paper proposes a distributed model according authority and access level of hospital officials in order to safely access patients' private information in u-Healthcare Environment. Proposed model can both limit the access to patients' biometric information and keep safe system from DoS attack using time stamp. Also, it can prevent patients' data spill and privacy intrusion because the main server simultaneously controls hospital officials and the access by the access range of officials from each hospital.

• Journal of the Korea Convergence Society
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• v.6 no.6
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• pp.285-291
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• 2015

FTMS, TCS, ITS equipment such as high-pass highway are just a situation that does not lack traceability and passive surveillance is related to fault DB has so far consisted of an integrated operations management to maximize utilization of the facility. In addition, there is no replacement parts are replaced when a failure occurs, increasing the number of parts and repair time I have trouble growing, and becoming a service interruption whenever you replace each time. In this study, proactively manage the failure history of a highway facility ITS tries to preventive maintenance. Therefore, the error history is based on the reliability of the high-pass facilities theory to calculate the reliability of the system through a systematic statistical analysis Operational Availability. The fault number and the time the replacement period through the estimate decreases and can reduce the budget expenses by securing the spare parts quantity, establish a management plan in part by improving the quality of the system through constant preventive maintenance, quality of service at all times It may direct the non-stop operation state of the available state.

• Journal of Platform Technology
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• v.6 no.3
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• pp.47-54
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• 2018

Predictive analysis in the hardware industry can be performed at an appropriate point in time to prevent failure of production facilities and reduce management costs. This helps to perform more efficient and scientific maintenance through automation of failure analysis. Among them, predictive management aims to prevent the occurrence of anomalous state by identifying and improving the abnormal state based on the gathering, analysis, and scientific data management of facilities using information technology and constructing prediction model do. In this study, we made a fault tree through the Relex tool and analyzed the error code of the hardware to study the safety.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.20 no.4
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• pp.71-82
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• 2021

In this study, a novel method for monitoring road pavements using the Mobile Mapping System (MMS) and a deep learning crack detection system was presented. Furthermore, an optimal maintenance method through economic analysis was presented targeting the pavement section of Sejong City. As a result of monitoring the pavement conditions, it was confirmed that the pavement ratings were good in the order of national highways, municipal roads, and roads of provinces. In addition, economic analysis using the pavement deterioration model showed that micro-surfacing, one of the preventive maintenance methods, is the most economical in terms of maintenance costs and user benefits. The results of this study are expected to be used as fundamental reference for local governments' infrastructure management plans.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2017.11a
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• pp.329-330
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• 2017

재난은 인류의 발전과 더불어 다양하게 발생되어왔다. 최근 21세기 들어 발생하는 재난은 그 현상이 더욱 다양하고 복잡하며 그 피해의 정도가 대규모로 진행되는 경우가 많아 졌다. 태풍, 집중호우, 강풍, 폭설, 지진, 황사 등의 자연재난은 지구온난화현상으로 국내뿐만 아니라 전 세계적으로 커다란 영향력을 미치고 있으며, 화재, 구축물의 붕괴, 지하철사고, 테러 및 감염병 등의 사회 재난도 더욱더 증가하고 있는 추세이다. 나아가 사스, 메르스, 지카 바이러스 및 대형 테러 등 전 세계적 차원의 사회 재난의 발생 또한 급증하고 있다. 이와 같이 현대사회에서 발생하는 재난는 개인이나 국가의 정책만으로 예방하고 관리할 수 없는 특성이 있다. 따라서, 자본주의 경제의 한축을 이루고 있는 기업의 재난을 관리하여 연속성을 확보하고 더나아가 리질리언스(Resilence)를 보장하기 위한 일환으로 2007년 7월 재해경감을 위한 기업의 자율 활동 지원에 관한 법률(이하, 기업재해경감법 이라함.)이 공포된 지 약 10여년이 경과하였다. 이는 법 제도화를 통하여 기업의 재해경감활동을 지원하기 취지에서 출발한 것 이다. 그 후 현재 까지 어느 정도의 발전이 있었지만 경과 년 수에 비해 아직 미흡한 실정이다. 이후 그 기업들이 좀 더 원활하게 재해경감활동을 위한 계획을 수립, 실행, 검토 및 유지하기 위한 지침으로서 기업재난관리표준을 2010년 4월 2일 제정하였고 이후 재해경감활동 수립계획을 제정하여 시행하기에 이르렀다. 또한, 기업재난관리표준은 제정된 이후 2013년 12월 9일 전면 개정작업을 통해 경영관리 프로세스 모델(Plan-Do-Check-Act)이 적용된 관리체계를 접목시키고 용어정의를 국제표준과 일치시켜 기업재해경감활동 상의 혼선을 방지하기 위한 노력을 하였다. 현 정부에서는 주무부처가 바뀌고 조직이 변화되어 행정안전부고시 제2017-1호(2017.07.26.일)로 개정되어 현재에 이르고 있다. 본 논문에서는 기업재난관리표준과 연관된 제반 법령 및 규정 등에 대한 법적성격 과 지위를 규명하고, 기업재난관리표준의 관련분야 적용 시 문제점 및 바람직한 제도개선 방향을 제시하고자 한다.