• 반도체디스플레이기술학회지
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• 제21권3호
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• pp.26-32
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• 2022

EtherCAT is an Ethernet-based fieldbus system standardized in IEC 61158 and SEMI, and widely used in the fields of factory automation, semiconductor equipment and robotics. In this paper, an EtherCAT master is implemented on an embedded board with Arm based 64-bit quad-core processor and its jitter performance is evaluated at the output of the network interface to include all the effects of the entire system in the results. For the EtherCAT master system, an open source EtherCAT master stack, Simple Open EtherCAT Master (SOEM), is installed on PREEMPT_RT patched Linux operating system for real-time operation. The results show that the jitter performance is comparable to that of Xenomai-based master and the EtherCAT master with two master instances has similar jitter performance to the EtherCAT master with one master instance.

• 한국항공운항학회지
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• 제28권3호
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• pp.12-17
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• 2020

Avionics is a compound word of aviation and electronics that began to be used in the late 1930s. In the components or sub-systems installed to the aircraft, avionics is something that works by electronic technology. In the past, the aircraft mate, the flight engineer, and the radar operators performed the work on board the aircraft but the modern aircraft have replaced these tasks with avionics. the aircraft mechanics who maintain and manage such complex aircraft must have expertise and technics with the development of avionics to maintain aircraft airworthiness. This paper is about the introduction of domestic avionics qualification system and the development of avionics maintenance technology. For this, the SWOT analysis is performed by identifying the internal and external environment. And recommend the strategy and direction of domestic avionics qualification and education system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2603-2605
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• 2001

In this paper, we introduce the concept and construction of a web-based bidirectional remote laboratory system. In this configuration, students build and test circuits using internet at home, and the circuit components and experimental equipments at the school are interconnected following student's design. This means that it is possible to choose components, build circuits, connect experiment equipments, control the equipment. and receive measurement results at home in real-time. Labview and Java are used to control this system efficiently and to provide user-friendly environments. Computer-based function generator, DMM, and oscilloscope are used and switch module is used to change interconnections. It was found that a system adopting computer-based instruments, which include PXI/CompactPCI modules and PC plug-in board, provide better performance than that adopting stand-alone instruments connected with GPIB. It is believed that, if this system is installed, the real experiments, not the virtual experiments based on simulation, can be done at home effectively, resulting in revolutional change in engineering education.

• 한국중재학회지:중재연구
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• 제18권1호
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• pp.3-30
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• 2008

This paper is to research the current status of ADR in Korea, the qualifications of mediator (or conciliator) and arbitrator, the ADR education program of major foreign arbitration-related institutions and the efficient management device of ADR education program for the activation of the ADR system. In 2007, arbitration applications received at the Korean Commercial Arbitration Board numbered 320 and the amount involved those cases was US$ 216 millions. Mediation applications received at the KCAB numbered 552 and the amount involved those cases US$ 29millions. As of December 2007, the total numbers of arbitrators on the KCAB Panel of Arbitrators was 978. There are no provisions for the qualification of arbitrator in the UNCITRAL Model Law on International Commercial Arbitration and Arbitration Act of Korea. The KCAB has the consolidation regulation of the Panel of Arbitrator of which purpose is to regulate the criteria and procedure regarding the drawing up and maintenance of the panel of arbitrators. The UK Chartered Institute of Arbitrators has the criteria and qualifications for membership of which three grades are associate, member and fellow. The American Arbitration Association has the qualification criteria for admittance to the AAA National Roster of Arbitrators and Mediators. The Japan Association of Arbitrators has the official authorization regulation for membership of which three grades are special associate, ordinary associate and fellow. The UK Chartered Institute of Arbitrators has the ADR education programs which are composed of the mediation courses and arbitration courses. The American arbitrators Association has the ADR education programs which are composed of in-person training and online training. The Japan Association of Arbitrators has the ADR education programs which are composed of the cultivation courses of conciliator and the practical training courses of arbitrator. The efficient management devices of ADR education program are as follows: the execution of official authorization system of arbitrator, the establishment of specialized division for training and official authorization, the establishment of ADR regular training courses, the publication of ADR training texts and obtaining of instructors, and the consolidation of regulations related to the official authorization of arbitrator and ADR training. In conclusion, for the activation of ADR system, the KCAB and Korean Association of Arbitrators should make further effort to provide the ADR regular education and training programs for potential and practicing conciliators and arbitrators.

• 공학교육연구
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• 제25권6호
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• pp.93-102
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• 2022

Due to COVID-19, all activities in society are emphasized non-face-to-face, and the educational environment is changing without exception. Looking at the results of the survey after conducting non-face-to-face education, there was a lot of rejection of non-face-to-face practical education. The biggest reason was that instructors were not familiar with the non-face-to-face education method, and feedback was not smooth during or after education. In particular, software practice education was not easy to share the software development environment, but communication and feedback on class contents and tasks were important. In particular, if face-to-face and non-face-to-face are alternately variable, it is not easy for practical education to be consistently connected. Even if non-face-to-face hands-on education is changed to face-to-face hands-on education, we will present a plan to use a data sharing system such as question-and-answer, assignment, practice content, and board content so that it can proceed smoothly. This study presents an efficient software education process that can provide learners with a software integrated practice environment based on a shared server, question-and-answer between instructors and learners, and share feedback on tasks. For the verification of the presented process, the effectiveness was confirmed through the survey results by applying the face-to-face/non-face-to-face education process to 220 trainees for 30 months in software education classes such as A university hands-on education, B company new employees, and ICT education courses.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.2266-2270
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• 2005

In this paper, an internet based control application for dynamical systems is implemented. This implementation is maily targeted for the part of advanced control education. Intelligent control algorithms are implemented in a PC so that a client can remotely access the PC to control a dynamical system through the internet. Neural network is used as an on-line intelligent controller. To have on-line learning and control capability, the reference compensation technique is implemented as intelligent control hardware of combining a DSP board and an FPGA chip. GUIs for a user are also developed for the user's convenience. Actual experiments of motion control of a DC motor have been conducted to show the performance of the intelligent control though the internet and the feasibility of advanced control education.

• 경영과학
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• 제14권2호
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• pp.81-90
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• 1997

Network approach is used to find the shortest paths and transportation time between the subway stations in Seoul, Korea. Because of transfer stations, we reconstruct the subway network to compute the shortest routes and corresponding transportation times. The reconstructed network is useful to obtain desired information because it can handle the transfer time between tracks. Time and route information about the subway system is obtained and it will be displayed in the subway guide board at each station. Then, all passengers can have the information of shortest route to a destination and corresponding transportation time.

• Journal of Advanced Marine Engineering and Technology
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• 제39권3호
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• pp.298-305
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• 2015

본 논문에서는 선박용 동기발전기 여자제어시스템의 성능을 확인하기 위해 선급기술규칙에 따라서 시행한 실험 결과를 제공한다. 실험에서는 발전기의 각 부하 변화에 대해 PID 제어기와 퍼지제어기를 적용하고 두 제어기법이 선급의 기술규칙을 만족하는 지 관찰하고 성능을 비교 검토 한다. 이를 위해 PID 제어기법과 퍼지제어기법을 랩뷰 프로그램으로 작성한 후, PID 제어기의 경우는 한계 감도법과 약간의 조정을 통해 이득값을 결정한다. 퍼지제어기는 맘다니(Mamdani)의 방법으로 전압오차값과 전압오차변화율값, 출력전압값에 대해 멤버쉽함수를 구성한다. 이상의 PID 제어기법과 퍼지제어기법을 실제 소형 발전기에 적용하고 선급기술규칙에 따른 실험을 통해 안정성과 성능개선 특성을 비교 검토한다.

• 한국생산제조학회지
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• 제22권3_1spc호
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• pp.607-614
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• 2013

This paper proposes a robot driving system and sensor implementation for use with an education robot. This robot has multiple functions and was designed so that children could use it with interest and ease. The robot recognizes the location of a user and follows that user at a specific distance when the robot and user communicate with each other. In this work, the robot was designed and manufactured to evaluate its performance. In addition, an embedded board was installed with the purpose of communicating with a smart phone, and a camera mounted on the robot allowed it to monitor the environment. To allow the robot to follow a moving user, a set of sensors combined with an RF module and ultrasonic sensors were adopted to measure the distance between the user and the robot. With the help of this ultrasonic sensors arrangement, the location of the user couldbe identified in all directions, which allowed the robot to follow the moving user at the desired distance. Experiments were carried out to see how well the user's location could be recognized and to investigate how accurately the robot trackedthe user, which eventually yielded a satisfactory performance.

• 수산해양교육연구
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• 제28권6호
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• pp.1591-1601
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• 2016

In recent years most of large-sized merchant ships have been equipped with a high-voltage system. The ships demanding a lot of electric power adopt the high voltage such as 3.3kV, 6.6kV, 11kV. Gradually as the high voltage system is increased in the ships, engineering officers are more opportunities to operate the high voltage system. So the high voltage training for engineering officers was established in the STCW 1978 as amended by the Manila Amendments in 2010. According to this convention when the engineering officers want to board the high voltage ships on and after January 1 in 2017, they must take the high voltage training. This paper, firstly, analyzes the content of high voltage training in STCW convention and IMO model course. In addition, it reviews the parts need to be considered in the content of the high voltage training. Finally this paper proposes the contents of training model divided into theory and practice.