• KNOM Review
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• v.24 no.1
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• pp.13-19
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• 2021

In recent, there is research to maximize production by preventing failures/accidents in advance through fault diagnosis/prediction and factory automation in the industrial field. Cloud technology for accumulating a large amount of data, big data technology for data processing, and Artificial Intelligence(AI) technology for easy data analysis are promising candidate technologies for accomplishing this. Also, recently, due to the development of fault diagnosis/prediction, the equipment maintenance method is also developing from Time Based Maintenance(TBM), being a method of regularly maintaining equipment, to the TBM of combining Condition Based Maintenance(CBM), being a method of maintenance according to the condition of the equipment. For CBM-based maintenance, it is necessary to define and analyze the condition of the facility. Therefore, we propose a machine learning-based system and data model for diagnosing the fault in this paper. And based on this, we will present a case of predicting the fault occurrence in advance.

• Journal of the Korean Society for Railway
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• v.15 no.6
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• pp.566-571
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• 2012

The door systems in urban railway vehicles, through heavy maintenance checks by six years, 75 parts for 34 part types in 75 units have to be replaced periodically, and the remaining 68 parts for 40 part types to be replaced occasionally based on the necessity. Even though this process makes the door systems almost to be initial status, the systems have complicated mixes of components with new parts and used and then have different property from the original ones. This study suggested a burn-in test as a subsidiary tool to improve the reliability of urban railway vehicles, and suitable for testing conditions and the proposed new target value.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.3 no.3
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• pp.257-268
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• 2005

In this paper, a prototype of the Bridge-Transported Servo Manipulator (BTSM) system is introduced, which has been developed to do operation and maintenance jobs remotely in a hot cell. The system consists of a telescopic transporter, a slave arm, a master arm, and a control system. Several tests such as a positional tracking, a weight handling, reliability, and operability have been performed and test results are presented. Based on the test results, an upgraded system which will be used during demonstrations of the advanced spent fuel conditioning process (ACP) has been designed.

• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.80-89
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• 2016

Recently, the paradigm shift of new construction into efficient operation and maintenance of infrastructure is seen. Also, concerns about infrastructure safety, especially the aged infrastructure, are on the increase. This study evaluates the current status of infrastructure safety and maintenance using data from 1994 to 2014 in Facility Management System operated by Korea Infrastructure Safety Corporation. Also, a quantitative analysis of safety performance of infrastructure is conducted to find out the enhancement of infrastructure safety in Korea. It was found that safety of facilities in Korea have been enhanced for the past decades. Improvement of safety performance of facilities is attributed to periodic safety inspection and repair and reinforcement. The result of the study can be used as a basic material for efficient and effective facility maintenance policies and strategies.

• The Journal of Korean Society for Radiation Therapy
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• v.18 no.1
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• pp.7-12
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• 2006

Purpose: This is for the purpose to help the bill related to technologists be systematic and unitary by carefully analyzing a legislation, an enforcement ordinance, and enforcement regulations in the connection with the radiological worker and the radiation workers from the law and regulations related to technologists. Materials and Methods: Concerning technologists, a legislation, an enforcement ordinance, and enforcement regulations for a sort of medical technician, regarding the radiological worker, the rules of diagnosis radiation equipment safety management, and concerning the radiation workers, atomic energy law, an enforcement ordinance and enforcement regulations were gathered, compared with one another, and analyzed. Results: Among technologists, in the case of working in the department of diagnosis radiation, the title 'Radiological Worker' is used by the Medical Service Law, and in the case of working in the department of radiation tumors or the one of nucleus medicine, the title 'Radiation Workers' is used by the Atomic Energy Law. Conclusion: Besides the technical term that is used by characteristic tasks, unification of the terms that can be used in common is necessary for sure. And when a legislation, an enforcement ordinance, enforcement regulations, and notification, things like that in the radiation field are amended, certainly they should be done by mutual agreement through negotiation between the organization related to radiation and the governmental organization.

• Korean Journal of Child Education & Care
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• v.18 no.2
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• pp.129-145
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• 2018

The main subjects of this study is to study the qualification and in-service education policies of the child care center staff and to suggest a desirable direction of policy. The main subjects of this study are child care staff policies and related laws. The results of this study shows that the philosophy, developmental psychology and some social backgrounds are the stantards required when designating the child care curriculum and essential subjects for attaining class 2 childcare teacher certificates. This study arises the needs of adjustment of the fields of the childcare curriculum contents, change between mandatory and elective subjects, and renewal of the subject title. The standards for competency in provision of childcare services of National Competency Standard(NCS) has to be considered in the adjustment process. The integrated teacher's certificate for teachers training system is needed in the reserve integration process. The systematization of the data and operating system is needed to manage the target of education efficiently, in order to develop childcare center staff's strengthening ability and professionalism. For in-service education, the diversification of the main body of operation, a periodical monitoring of the content, administrative and financial support are needed. Voluntary participation of in-service education, and the childcare center staffs professional development policy making supported by the government and parents is needed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.176-181
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• 2019

According to the 2017 Industrial Accident Analysis by Age, 71.8 % of construction disaster victims and 74.9 % of the deaths were workers aged 50 years or older, highlighting the seriousness of industrial accidents among aged construction workers. In this study, 303 construction workers aged 50 or older and 178 safety managers were surveyed on ways to improve the basic occupational safety and health education for senior workers in the construction industry. According to a comparison of the safety awareness for safety education by senior workers and safety managers, the safety manager showed a higher sense of safety for education than elderly workers. Regarding the remuneration education for those who had received basic occupational safety and health education in the construction industry, 69.9 percent said that regular remuneration education was needed, and 69.9 percent of them said that basic occupational safety and health repair education in the construction industry was needed every three years after the completion of education. This study is intended to present improvement plans for repair education for those who have completed basic occupational safety and health training in the construction industry.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.385-387
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• 2004

임베디드 시스템의 발전에 따라, 임베디드 소프트웨어의 활용 분야와 복잡도는 급격하게 증가하는 반면, 실제적인 임베디드 소프트웨어의 개발 생산성과 품질은 그 요구에 부합하지 못하고 있다. 이러한 문제의 근본적인 해결을 위해서는. 기존의 임베디드 시스템 의존적인 방식에서 벗어난 임베디드 시스템 독립적인 소프트웨어의 개발 기법이 필요하다. 이에 따라 본 논문에서는, 이종 플랫폼 통합 개발방식으로서 제시된 MDD의 개념을 바탕으로, 임베디드 시스템 소프트웨어인 디바이스 드라이버를 템플릿 형태로 정의하고, XML문서로 표현된 임베디드 시스템 정보와 매핑을 통해 실제 디바이스 드라이버를 개발하는 방안을 제시한다. 이것은 하나의 디바이스를 템플릿을 통해 시스템 독립적으로 표현하고. XML로 표현된 임베디드 시스템 정보와의 매핑을 통하여 여러 임베디드 시스템에서 동작 가능한 디바이스 드라이버를 자동으로 생성함으로써, 임베디드 소프트웨어의 개발생산성과 유지보수성 향상을 보장한다. 또한, 동일 소프트웨어의 중복개발 방지 및 재사용성 향상을 통해 개발비용의 축소와 개발 기간의 단축을 보장한다

• Proceedings of the KIEE Conference
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• 1991.11a
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• pp.47-50
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• 1991

This paper discusses a knowledge-based system being developed by KAIST and KEPCO to assist planning the annual maintenance schedule of power units. To meet users' requirements, we have designed the system with several features: man-machine interaction, catalog system, user-friendliness, the hybrid-system of math-model and knowledge-base. In this paper, we introduce the outline of our system.

• Journal of the Korean Society for Nondestructive Testing
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• v.14 no.1
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• pp.32-38
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• 1994

현재 국내의 원자력(原子力) 발전소(發電所)는 경수로형 원자로(PWR)가 대부분이며, PWR의 경우 ASME Sec. XI의 요건에 따라 가동전(稼動前) 중(中) 검사(檢査)(preservice and inservice inspection)을 핵연료 교체 및 정기 보수 기간에 수행하고 있다. 현재 83년 및 86년 규격들이 검사에 적용되고 있으며 조만간 89년 규격(規格)이 적용(適用)될 시점이다. 따라서 원전 주요 부품에 대한 ASMB규격의 검사(檢査) 요건(要件)의 변화(變化) 과정(過程)을 살펴 보고 검사 강화 및 완화 내용을 검토하였다. 규격은 71년부터 89년까지를 대상으로 편집년도기준(編輯年度基準)으로 검토하였으며, 부록판의 내용은 제외하였다.