• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 춘계학술대회 논문집 전기설비전문위원
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• pp.85-87
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• 2004

We described the trend of diagnosis of technology in this paper Diagnosing key technologies in NTRM were explained. Development history of maintenance technology was described and the roles of diagnosis technology for maintenance technology were analyzed from past time to future.

• 건축역사연구
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• 제31권5호
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• pp.21-34
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• 2022

This study investigated the maintenance and management of government office building in Dongnaebu, Gyeongsangdo in the mid-19th century. In the late Joseon Dynasty, Dongraebu was an important point of national defense and a place of trade and diplomacy with Japan, so it had many government facilities. There are very few government facilities remaining today, and no structure remains. Therefore, it is possible to grasp information about the government facilities through the old materials. Currently, there are public documents related to the local government offices such as Eupji, Eupsarye, and Junggi. Through comparison between public documents, we will examine the maintenance and management of Dongnaebu government facilities in the mid-19th century. As a result of the research, Dongnaebu government facilities were supervised by department and managed like articles. In addition, the name, size, and changes were all recorded in the management of the goods, and the authority of responsibility was clearly stated. This result is because the remaining material has the purpose of preparation as an accounting book. As a result, it was found that the government facilities in the late Joseon Dynasty were managed by a systematic department with clear authority.

• 전기학회논문지
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• 제62권8호
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• pp.1177-1183
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• 2013

In this paper, the analysis of inspection period bases on reliability is suggested in the field of traction power system. Even though there are several maintenance models, the most commonly used maintenance assessment has been focused on time based maintenance in real traction power systems. The maintenance intervals are selected on the basis of long-time experience. It ensures high availability and exact planning of staff. Reliability centered maintenance, which evaluates criticality and severity of each failure mode, achieves the operation, maintenance, and cost-effective improvement that will manage the risks of equipment. This paper deals with electrification in railway inspection frequency and applied reliability based inspection frequency instead of constant intervals. The distribution function of failure rate in traction power system belongs to Weibull function. Also, the fault data and the number of installed equipments for electrifications are collected. The failure history is investigated and classified in detail. Though these complicated procedures, it contribute to extend equipment lifetime and to reduce maintenance costs.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.2059-2063
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• 2004

Most power plants have operated many independent computerize systems for maintenance. Independence of systems have caused complexity of business process and inconvenience of computer system management. Because the equipment and material master data is not standardize and structurize, it is difficult to manage equipment maintenance history and material delivery. Especially equipment classification criterion is important for standardization of every maintenance information. It is necessary to integrate function of independent systems for business process simplification and rapid work flow. this paper provides equipment classification criterion design and system integration method with the case of live system development.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1050-1057
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• 2007

The objective is to compare with economic evaluation and to analysis the LCC for prestressed concrete used on rail bridge. A new style concrete bridge is difficult to estimate a history for maintenance cost reliably. For the reason, we introduce a analogical interpretation by similar bridge style in order to estimate a appropriate maintenance profile. The proposed method is usefully supplied to estimating the LCC for bridge which is difficult to determine the maintenance cost.

• 인간식물환경학회지
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• 제23권3호
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• pp.347-362
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• 2020

Background and objective: It is difficult to conclusively determine the exact cause of tree defects since multiple causes are involved such as climate change, plantation, tree quality and planting time, construction, planting base, drainage, sunshine conditions, maintenance, and microclimate. The data related to landscaping construction defects are scattered or fragmented by companies and years, but not managed systematically by the defect information management system. Most of the earlier studies associated with tree defects in apartment complexes suggested defect rates after examining tree defects in the completed construction site and proposed fragmentary and subjective conclusions about the causes of defects observed in trees with high defect rates. It is proposed to continue to conduct studies on the establishment and analysis of systematic databases to identify the exact causes of tree defects and measures to improve, and the need to accumulate systematic data in the construction process where many defects arises. This study was conducted to reduce the defects of trees planted in apartment complexes. Methods: Main factors related to tree defects were subdivided based on the results of literature review and a defect investigation at the completion site, and tree history management items were selected and subdivided during the construction stage. Results: The criteria for the preparation of subdivided items were obtained, and the tree history management checklist was written for the site under actual construction and a systematic database was established. Items that are categorized based to the causes of defects include the location of nurseries, date, tree quality, site conditions, planting techniques, microclimates, and maintenance. Conclusion: This study suggested tree history management items based on the tree defects that can be identified at the construction stage and applied them to the selected study site, which differentiates this study from earlier studies. It will be necessary to conduct a comprehensive and objective time series analysis on tree defects that occur over time by continuously monitoring and collecting data after construction.

• 대한기계학회논문집A
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• 제29권3호
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• pp.495-502
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• 2005

Increased cumulative running times of railroad vehicle brings out such degradation as wear and fatigue. It doesn't adapt corrective maintenance which repairs a poor part after a trouble but use preventive maintenance which fixes a bad part before a trouble. There were a few researches for preventive maintenance such as inspect affairs and facilities management. They couldn't estimate the operation reliability on railroad vehicle. Therefore, this study proposes the preventive maintenance procedure that predict repair period of end beam fur uncovered freight car using reliability function and instantaneous failure rate on the basis of fatigue test and load history data.

• 한국철도학회논문집
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• 제10권2호
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• pp.167-178
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• 2007

In general, it is known that the concrete ballast track is possible to reduce a cost of maintenance activities cause of maintenance free by restrictive maintenance in application of track ballast structures. However, if deteriorations and fracture mechanism of a material are considered, proper maintenance activities and repairing are continually required. For the problems, we evaluated an economical efficiency of the gravel ballast and the concrete ballast on a proper level of maintenance activities. As the method based on history path is difficult to obtain sufficient reliabilities cause of an absence of real data for maintenance activities, we chose the delphi survey method by professional group, and we obtained the appropriate index and profiles for maintenance activities. As a result, we founded that effects for cost reduction can be expected by preventive maintenance management, and we proposed economical restrictions and life cycle cost for track ballast structures in a life cycle.

• 한국디지털건축인테리어학회논문집
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• 제9권2호
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• pp.25-33
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• 2009

So far we have investigate and analyzed the actual conditions of building maintenance in Korea and compared the building maintenance laws and systems between Korea and other countries. Now, based on the results from such comparison and analysis, this study proposes the following ideas for improvement: 1) As we can learn from domestic and foreign case studies, in the existing built-up areas becoming obsolete, many building owners remodel their buildings illegally in reaction to current economic and social changes. Therefore, for efficient maintenance of buildings, it is required to improve building maintenance systems by formulating information about inspection items, inspectors, supervisors, inspection costs and intervals of reporting results, depending on how large the buildings are and what they are used for. 2) In addition, to ensure the success of a building maintenance system, it is necessary to keep and manage a history of building maintenance thoroughly and introduce a certification program which gives an appropriate grade to maintenance performance and commits the government to expand their public roles and supporting policies, as widely used in some foreign countries. Further, in keep the building maintenance system secure, there should be a nationwide consensus as well as a favorable evaluation from building owners and manager, and all related people.

• 한국건설관리학회논문집
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• 제22권1호
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• pp.72-80
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• 2021

지난해 기준 국내 30년이 넘은 노후화 건축물이 37%를 차지하고 있으며, 건물 노후화 수치가 점차적으로 늘어남에 따라, 건물유지보수의 필요성이 대두되고 있다. 건물의 유지보수를 위해서는 많은 작업 주체가 참여하여 업무를 진행한다. 그 중 '유지보수 관리자'의 업무가 가장 큰 비중을 차지한다. 현재 업무를 살펴보면 유지보수 건축물의 이력관리를 도면 혹은 수기로 기록하여 보관하는 방식으로 진행되고 있으며, 해당 자료를 재 열람하기 위해서는 많은 시간이 소모된다. 이에 본 연구에서는 작업자의 유지관리 업무 편의성 향상과 이력관리를 최적화 하기위해 기존 유지보수 프로세스를 파악하고, 분석하여 문제점을 도출하고 스마트 디바이스 기반의 자동화 모델을 구축하였다. 본 연구는 스마트 디바이스 기반의 자동화 모델 구축을 위하여, ① 일반적인 시설물 관리 프로세스 분석 및 관련 문헌 검토, ② 현재 유지보수 프로세스 개선, ③BIM Data, COBie Data, IoT 및 AR 기술을 기반으로 유지보수 관리 자동화 모델 기능 구성도 제작, ④ 스마트 디바이스 기반 유지보수 관리 자동화 모델 구축, ⑤ 사례 현장 적용, 유지보수 관리 진행 및 이력정보 재검토 소요 시간 비교를 통한 시스템 검증을 실시하였다.