• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.454-456
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• 2002

Embedded system is used a lot in electric home appliances and home network equipment. However, this system is designed to operate by the system operator directly at home and operator could find out them only when he pays attention to the system in case event happens. In this paper, to improve above things, it designed to remote-control system anywhere in which internet access is possible as well as at home, and also it designed SMS(short message service) information transmission system to inform the errors to the operator when they happen. To design the system, development board(be included the Strong Arm), CDMA module, and electric door lock are used as hardware, and web browser, CGI(common gateway interface) programming, and C-language are used for implementation of software in embedded-linux platform.

• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.532-534
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• 2015

This is a dissertation is in urgent announce of the domestic legislation about bungee jumping. A bungee jumping operator puts the blame on us for causing the bungee jumping accident but before calling it, equipment of bungee jumping was old and deficient. Fee of bungee jumping is fifty thousand won. A rope seller has raised the price, as operator break the rope used limit. So that is reasonable price. Even now, operator break the rope used limit and legislation about bungee jumping is nonexistent so bungee jumping accidents occur with frequency in domestic.

• Korean Journal of Mathematics
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• 제27권1호
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• pp.119-129
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• 2019

Balance function is one of the joint factors to determine fall in risk theory. It helps to moderate the progression and riskiness of falls for detecting balance and fall risk factors. Nevertheless, the objective measures for balance function require expensive equipment with the assessment of any expertise. We establish the existence and uniqueness of a multi-order fractional differential equations based on ${\psi}$-Hilfer operator on time scales with balance function. This class describes the dynamic of time scales derivative. Our tool is based on the Schauder fixed point theorem. Here, sufficient conditions for Ulam-stability are given.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 춘계학술대회
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• pp.187-189
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• 2022

As the structure and operation method of MASS(Maritime Autonomous Surface Ship) are discussed accroding to the IMO degree, the interest and necessity for remote operators who manage and supervise the operation of MASS are increasing gradually. The form of MASS operation is clearly accompanied by various changes including new technologies and equipment in comparison with the current operation of ship. In IMO Degree 2 and 3, the capabilities that remote operators who will operate them must differ from those of existing seafarers(navigation officers, engineers and ratings). Regarding this remote operation, the NI(Nautical Institute) is the first in the world to present a syllabus and a curriculum of qualification for remote operator. Based on this, the paper introduces and compares the education model of MASS remote control operation and NI model, and further uses it as basic data for the creation of curriculum for future MASS remote operator.

• 농약과학회지
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• 제17권1호
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• pp.50-59
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• 2013

본 연구는 우리나라 과수 농약살포자의 농약 노출량 산정과 위해성 평가를 위하여 수행되었다. 우리나라 과수에 사용되고 있는 약제 중 분무의 형태로 이용되는 97종의 품목에 대하여 사용방법에 대한 정보를 수집하였고, 이를 근거로 농약 노출량을 국내실정에 맞게 변형한 UK-POEM(United Kingdom-Predicted Operator Exposure Model)모델을 이용하여 산정하였다. 산정된 노출량을 세계 각 기관에서 발표된 농약살포자 노출허용량과 비교하여 위해성을 평가하였다. Speed sprayer (SS기)를 이용하여 살포작업을 하는 경우 개인보호장비(PPE)를 착용하지 않았을 때 74.2%, 개인 보호장비를 착용하였을 때 42.3%가 위해성이 있는 것으로 나타났다. 또한 동력분무기(MS기)를 이용하였을 경우 개인보호장비(PPE)를 착용하지 않았을 때 64.1%, 개인 보호장비를 착용하였을 때 19.4%가 위해성이 있는 것으로 나타났다. 이러한 결과는 현재 우리나라 과수 농약살포자의 농약 노출로 인한 위해성이 우려된다는 것을 의미한다.

• Nuclear Engineering and Technology
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• 제36권2호
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• pp.184-195
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• 2004

The multi-tasking feature of digital I&C equipment could increase risk concentration because the I&C equipment affects the actuation of the safety functions in several ways. Anticipated Transient without Scram (ATWS) is a typical case of safety function failure in nuclear power plants. In a conventional analysis, mechanical failures are treated as the main contributors of the ATWS. This paper quantitatively presents the probability of the ATWS based on a fault tree analysis of a Korea Standard Nuclear Power Plant is also presented. An analysis of the digital equipment in the digital plant protection system. The results show that the digital system severely affects the ATWS frequency. We also present the results of a sensitivity study, which show the effects of the important factors, and discuss the dependency between human operator failure and digital equipment failure.

• 비파괴검사학회지
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• 제23권3호
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• pp.270-279
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• 2003

Parametric studies have been conducted into the variability of the factors affecting the ultrasonic testing applied to weldments. The influence of ultrasonic equipment, transducer parameters, test technique, job parameters, defect type and characteristics on reliability far defect detection and sizing was investigated by experimentation. The investigation was able to build up substantial bank of information on the reliability of manual ultrasonic method for testing weldments. The major findings of the study separate into two parts, one dealing with correlation between ultrasonic techniques, equipment and defect parameters and inspection performance effectiveness and other with human factors. Defect detection abilities are dependent on the training, experience and proficiency of the UT operators, the equipment used, the effectiveness of procedures and techniques.

• 한국산학기술학회논문지
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• 제10권9호
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• pp.2379-2383
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• 2009

본 논문에서는 발전설비를 관리하기 위한 RFID 기반의 정보화 시스템 구현에 관한 논문으로, 관리되는 상태 항목에는 자재의 입고 및 출고, 구매 발주, 도면 관리, 설비규격, 운용자 조작, 수주, 재고, 생산 실적, 시스템 관리 등이 있다. 제안된 논문은 발전설비 고장 상태 진단의 모니터링 서비스 제공을 목적으로 RFID 기반 상태 관리시스템을 설계 및 구현하였다.

• 드라이브 ㆍ 컨트롤
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• 제19권4호
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• pp.70-76
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• 2022

In this paper, we develops an unmanned test system for the purpose of realizing an actual forklift-based test-bed for the operation durability of the forklift mast. First, two robot actuators were applied to the lever to replace lever manipulation of the operator. For detecting the height of the fork and the tilt angle of the mast, the laser displacement sensor and the inclinometer were installed to the forklift. Next, the embedded control system was used to control the robot actuator with reference to test mode. Experimental evaluation verified that developed test system was effective and practical for the viewpoint of the repeatability of the test mode.

• Nuclear Engineering and Technology
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• 제53권3호
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• pp.842-850
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• 2021

Real Time Simulation (RTS) has long been used in the nuclear power industry for operator training and engineering purposes. And, Online Simulation (OLS) is based on RTS and with connection to the plant information system to acquire the measurement data in real time for calibrating the simulation models and following plant operation, for the purposes of analyzing plant events and providing indicative signs of malfunctioning. An OLS system has been developed to support PWR operations for CPR1000 plants. The OLS system provides graphical user interface (GUI) for operators to monitor critical plant operations for preventing faulty operation or analyzing plant events. Functionalities of the OLS system are depicted through the maneuvering of the GUI for various OLS functional modules in the system.