• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.143-145
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• 2007

The development of excitation control system (ECS) for emergency diesel generator in nuclear power plant is the replacement project of existing control system to resolve the maintenance problems caused by aging and obsolescence, The excitation control system is classified as a safety-related system. To guarantee the performance of developing excitation control system is equal to or higher than that of other systems, establishing the quality assurance scheme, doing software verification and validation activities, and planning equipment qualification. In this paper, we'd like to introduce the equipment qualification of excitation control system.

• Journal of the Korea Institute of Military Science and Technology
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• v.15 no.5
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• pp.543-549
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• 2012

Hybrid electric propulsion systems are expected as future primary combat platforms because the systems can supply enough electric power, easily locate components inside vehicles, and maneuver without undesired noise. However, increasing electric/electronic/software usage causes abnormal failure patterns which have not been noticeable in conventional automotive. Recently, the functional safety standard for road vehicles were enacted and vehicle manufacturers request their components which satisfy standardized quality. This research analyzes functional safety standards(IEC 61508 and ISO 26262) and compares the standards for road vehicles with military standards of system safety. Strategies to apply functional safety in the combat hybrid electric vehicle are scrutinized.

• Journal of Practical Engineering Education
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• v.15 no.2
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• pp.467-474
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• 2023

Disaster safety education that can respond when a disaster occurs is very important in Korea, where many human resources are generated due to safety insensitivity. Recently, with the development of virtual reality devices and manufacturing technology, the possibility of using a training system incorporating virtual reality technology in the field of safety education is attracting attention. The virtual training system is very effective for training and education because it has an excellent sense of immersion and allows you to experience various disaster situations without time and space limitations. In this study, cases of disaster safety virtual training contents in Korea are collected and investigated, and the current status of domestic disaster safety virtual training contents is identified and analyzed to identify problems and suggest improvement plans.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.29 no.1
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• pp.101-108
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• 2006

The issue of using information system to ensure competitive power in the market is rising. The outsourcing methods that entrust activities of information system of companies to other expert agencies are increasing as the enterprises make a lot of efforts to put their resources to their heart of business in the process of adopting information system. Recently, ASP(Application Service Provider) as a new information technology outsourcing method appears due to the development of network technology and spreading of peculating software. ASP defines as a software leasing service which is supplied through networks instead of purchasing application software with high price. For successful implementation of ASP, it is necessary to develop a certification program to ensure safety and reliability of ASP. This paper provides the safe and reliable certification program for ASP. In order to develop it, the critical issues related to service quality and certification of ASP are identified and then evaluation methodology for the ASP certification program is proposed. This paper presents service provider(service environment) certification as the part of the ASP certification program.

• Journal of Information Processing Systems
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• v.19 no.3
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• pp.385-393
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• 2023

Since the proportion of elderly citizens is increasing every year, the social interest is increasing for the health and the safety of the elderly. The nursing home is continually being created to care for more elderly people. However, the quality of service is not enough due to the lack of elderly caregivers. Elderly care and management services are being studied to replace the shortage of caregivers. Existing research for the implementation of an automatic care system has a high initial system cost. Furthermore, it lacks the ability to store and manage large amounts of data. In this paper, we propose a system that manages a large amount of data continuously generated through CCTV and provides a streaming service with a high level of quality-of-service (QoS) to users with collected video. Through the proposed system, it is possible to record and manage the behavioral information of the elderly occurring in the nursing home together with the video. In addition, according to the user's request, it has built a service that streams the video and behavioral information according to the date and time in real-time.

• Journal of the Korean Society of Safety
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• v.10 no.4
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• pp.22-35
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• 1995

In this paper, an electronic control unit is developed using 16bit microcomputer for automobile engine. This system incorporate AFS(Air Flow Sensor) of Hot Wire type, DIS(Direct Ignition System), ISC(Idle Speed Control) system, CAS(Cranke Angle Sensor) and other peripheral device. This system includes hardware and software to facilitate precision control of both fuel injection and ignition timing. Especially, this controller consists of position signal(180 teeth) and 4 REF signals. Present system has maximum $720^{\circ}CA$ delay. But this system has maximum $180^{\circ}CA$. Thus, this system is able to precision control both fuel injection and ignition timing.

• Journal of the Korean Society of Safety
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• v.15 no.2
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• pp.36-45
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• 2000

Automated production system is composed of many complicated techniques and it become a very difficult task to control, monitor and diagnose this compound system. Moreover, it is required to develop an effective diagnosing technique and reduce the diagnosing time while operating the system in parallel under many faults occurring concurrently. This study develops a Modular Artificial Neural Network(MANN) which can perform a diagnosing function of multiple faults with the following steps: 1) Modularizing a complicated system into subsystems. 2) Formulating a hierarchical structure by dividing the subsystem into many detailed elements. 3) Planting an artificial neural network into hierarchical module. The system developed is implemented on workstation platform with $X-Windows^{(r)}$ which provides multi-process, multi-tasking and IPC facilities for visualization of transaction, by applying the software written in $ANSI-C^{(r)}$ together with $MOTIF^{(r)}$ on the fault diagnosis of PI feedback controller reactor. It can be used as a simple stepping stone towards a perfect multiple diagnosing system covering with various industrial applications, and further provides an economical approach to prevent a disastrous failure of huge complicated systems.

• Journal of Korea Society of Digital Industry and Information Management
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• v.17 no.4
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• pp.77-83
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• 2021

As Open Source Software(OSS) recently invigorates, many companies actively use the OSSes in their business software. With such OSS invigoration, our web application is developed in order to provide the safety in using the OSSes, and update the information on the new vulnerabilities and the patches at all times by crawling the web pages of the relevant OSS home pages and the managing organizations of the vulnerabilities. By providing the updated information, our application helps the OSS users and developers to be aware of such security issues, and gives them to work in the safer environment from security risks. In addition, our application can be used as a security platform to greatly contribute to preventing potential security incidents not only for companies but also for individual developers.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.435-437
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• 2003

Recently, as the road capacity reaches the limit and environmental problems becomes serious, there is gradually increased a need for railroad vehicles that are environment-friendly and have time regularity, reliability and safety. Accordingly, in addition to conventional railroad vehicles, lots of vehicles are being newly developed. We developed the hardware and software of the measurement system for on-line test and evaluation of korean hish speed train. The software controls the hardware of the measurement data and acts as interface between users and the system hardware. In this paper, we is studied for electric apparatus performance of railway vehicle using sensor. In order to this test is developed signal conversion system. Using this system, we obtained important result for pantograph voltage, battery voltage, axle speed, and running speed.

• Proceedings of the KSR Conference
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• 1999.05a
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• pp.315-321
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• 1999

The railway signaling system consists of microcomputerized vital devices on board and ground, which are connected to one another by track circuits, and interlocking equipment for route control, The software plays a major role in these microcomputer-based vital systems. Therefore it is important to design the software and validate the required levels of safety and reliability To verify the conditions and functions of signaling logic, the laboratory prototype test bench, which consists of personal computers, VME system and Ethernet LAN, will be developed. In this paper general design of signaling system test bench for high-speed rail is described and some developed subprogram is presented.