• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.569-570
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• 2022

산업체에서 고장 상황이 빈번히 일어나고 이를 위한 기존의 2D 기반 기반의 매뉴얼은 이해가 직관적이지 않고, 유지보수 전문가와 즉각적인 상호작용이 어렵다. 본 논문에서는 원격지에 고장 상황이 발생하였을 때 증강현실을 기반으로 작업자들이 시간과 장소에 제약 없이 실시간으로 전문가의 도움을 받아 유지보수 할 수 있는 기술을 제안한다. 로컬의 가상휴먼 기반 전문가는 HMD 헤드셋을 착용한 상태로 원격지 고장 상황의 적응화 된 파노라마 영상을 기반으로 고장 상황을 진단하고, 원격지의 작업자에게 지시를 내린다. 또한 원격지의 증강현실(AR) 환경에서는 작업자와 전문가의 상호작용을 위해 HMD의 마이크를 이용하여 언어적 소통뿐만 아니라 전문가의 손을 가상으로 생성하고, 가상 손을 사용하여 전문가는 실제 개체에 레이저 포인터를 이용하여 가르키거나, 그림을 그릴 수 있다. 본 기술을 이용한다면 기존의 2D 기반의 매뉴얼의 한계를 극복할 수 있으며 원격지에 전문가가 직접 방문하지 않더라고 원격에서 유지보수를 원활하게 진행하는데 도움을 제공할 수 있다.

• 동력기계공학회지
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• 제8권2호
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• pp.5-11
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• 2004

The failure frequency of the Emergency Diesel Generator(EDG) at Nuclear Power Plants(NPPs) is not so much lower than that of the Marine engines, whereas the running hours of the diesel engine at NPPs is much less than those of the engines for commercial service. The primary factor results from the severe surveillance test requirements such as fast start, large number of starting test, fast load-run, high load running, etc. The other factor comes from the excessive maintenance based on the engine maker's instruction manual that did not incorporate the peculiar characteristics of the diesel engines at NPPs. In this paper, the present preventive maintenance program on the basis of the Pielstick diesel engines was reviewed for the purpose of securing the reliability of the emergency diesel generator at NPPs and the ways for its improvement were presented by referring to the overseas cases for their applications.

• 한국멀티미디어학회논문지
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• 제23권2호
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• pp.293-300
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• 2020

Since the communication networks like the Internet collapses at disaster and calamity sites, a maintenance system that can be operated offline is required for the maintenance of various facilities. In this paper, we propose a system that memory tags attached on the facilities may transmit the emergency manual to a smart-phone, and the smart phone displays it off-line. The main issue is to design low energy mode memory tags. This study presents two kinds of methods and analyzes each's energy consumption mode. The first one is to develop memory tags by using one chip, and the next one is to design memory tags by forming multi-modules. Both ways show proper application fields under the low energy mode. This research selects the off-line maintenance system by using one chip design, and proposes the direction of contents for enhancing the effectiveness of the system. And we expect that this memory tags will be valuable for disaster scenes as well as battle fields.

• 전기학회논문지
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• 제66권12호
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• pp.1830-1835
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• 2017

8200 Series Electric Locomotives are mostly imported from overseas due to aging and uncertainty of source technology, and it's the maintenance cost is increasing. We are analyzed life cycle costs based on international standards such as IEC 60300-3-3 and IEC62278. The main conversion system of the 8200 series electric locomotive is closely related to vehicle operation and is one of the subsystems requiring frequent maintenance. In this paper, the life cycle cost of the main conversion unit in 8200 series electric locomotive is analyzed based on the maintenance manual. As a result of analysis, maintenance cost of GTO module and control device is relatively high, and it is confirmed that the cost increases according to the useful life.

• 대한정형도수물리치료학회지
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• 제13권2호
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• pp.96-101
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• 2007

There are increasing needs for welfare in industrial environments in modern society. Industrial health is one of the most important components of industrial welfare, and it includes maintenance and improvement of physical, mental, and social health of the workers, elimination of factors threatening workers, prevention and early intervention of industrial diseases. In this regards the importance of industrial physical therapy is increasingly recognized and the need of physical therapy in industrial field is increasing. The authors surveyed and analyzed the curricula of the departments of physical therapy to promote development of curriculum or program for educating specialized industrial physical therapists. There are 40 institutes opening the department of physical therapy, 4-year courses in 17 and 3-year courses in 23. Only 2 institutes have subjects that are directly related to industrial health. This means that specific educational program for specialized industrial physicaltherapists is not established yet though there are many needs for industrial health and physical therapy in industrial fields. But many topics or knowledge of industrial health or physical therapy are scattered in several subjects. So we suggest the needs of systematic reorganization of specific curriculum that including ergonomics and prevention and treatment of industrial diseases for education of specialized industrial physical therapist.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.1166-1172
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• 2003

The extremely strong competition among the world automobile industries has introduced the concept of PLM in the total production activities, one of whose major components is VM(Virtual Manufacturing). If the production lines are equipped with robots, the application of OLP in the virtual space is fully mature. However, in the point of the investment's and the maintenance's view, there are always some activities, which can not be automated: for example, typically the manual welding for prefixing in the automobile body shop and the material loading. Process planning for these activities, therefore, are decided mainly by experiences, which caused many repeated rework of the processes and the inconvenience of the workers, and resulted consequently in the reduction of the productivity and the safety of the workers. In this paper, the optimal dimension of the welding gun and its handle position and the optimal working path is simulated and decided by use of DELIMN/IGRIP and DELMIA/Ergo and the working area modelized in the virtual workcell of DELMIA.

• 대한추나의학회지
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• 제4권1호
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• pp.55-65
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• 2003

The purpose of this article was to contribute to the knowledge of physiological and pathological changes of aging skeletal muscles, and of therapic method. By aging there were changes of distribution of muscle fibers, the loss of muscle mass, the loss of the number of muscle fibers, the loss of glycolysis capacity, the decrease of the oxidative enzymes and muscle vascularization in the skeletal muscles. And as a pathological change, the exhaustive maximal exercise increased oxidative stress that led to oxidative damage which were shown to be implicated in promoting aging. The property of intensity and duration exercise is important not only in keeping human health and physical fitness from oxidative stress, but also for the maintenance of well-being and quality of life.

• 산업경영시스템학회지
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• 제25권5호
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• pp.60-66
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• 2002

The military services have sought to improve the overall quality, management, and delivery of military technical information in all of its aspects. The efforts concentrated on developing IETM(Interactive Electronic Technical Manual) by using the application of computer technology for the storage, control, and presentation of maintenance, system-operation, training, and other forms of logistic-support technical information. In this paper, the methodologies are presented to evaluate the operational effectiveness of IETM which consists of confirmity and performance. Confirmity is evaluated by the check-sheet based on the standard of CALS, and performance by the comparison of the technician performance between IETM and paper-TM.

• 한국군사과학기술학회지
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• 제2권1호
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• pp.61-72
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• 1999

A Technical Manual is the tool that offers a guidance to a maintenance engineer in order to exactly use and maintain of complicated weapon system. Because the modern weapon system are complex and functionality integrated, its quantity is massive. So We spend a lot of money on its publication and suspending recent information. To solve this problem, to reduce a risk of loss and use easily, this study develops the IETM(Interactive Electronic technical manual) which observes the CALS standard. This paper provide the development concept, environment, technic of IETM.

• Asia pacific journal of information systems
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• 제14권2호
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• pp.115-130
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• 2004

This paper proposes how to build an expert profile database in KMS, which provides the information of expertise that each expert possesses in the organization. To manage tacit knowledge in a knowledge management system, recent researches in this field have shown that it is more applicable in many ways to provide expert search mechanisms in KMS to pinpoint experts in the organizations with searched expertise so that users can contact them for help. In this paper, we develop a framework to automate expert classification using a text categorization technique called Vector Space Model, through which an expert database composed of all the compiled profile information is built. This approach minimizes the maintenance cost of manual expert profiling while eliminating the possibility of incorrectness and obsolescence resulted from subjective manual processing. Also, we define the structure of expertise so that we can implement the expert classification framework to build an expert database in KMS. The developed prototype system, "Knowledge Portal for Researchers in Science and Technology," is introduced to show the applicability of the proposed framework.