• Journal of the Korean Society for Precision Engineering
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• v.16 no.3 s.96
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• pp.38-46
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• 1999

Spindle motor current is used to estimate the cutting force indirectly and control the feed rate for the cutting force regulation. The proposed algorithm is implemented to a DSP board based hardware for the industrial application. The software to make POP terminal communicate with the DSP board and POP server is coded under Windows 95 environment. Experiments under varying cutting conditions show that the DSP board recognizes the information of installed cutting tool and cutting conditions delivered from the POP server to use them for the proper control of the feed rate. The cutting force is regulated well during machining of tapered or stepped workpiece and circular shaped workpiece as well.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.197-199
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• 2018

Recently, many industrial instruments face the problem of protocol compatibility with the external monitoring and control system. This paper is prepared in the main control board to support the industrial communication protocol conversion, control, and monitoring. The industrial communication gateway module is also designed to ensure that the protocol conversion of CAN bus and Ethernet. The main board processor is used the Atmega2560, and placed 4ea RS485 serial slots for sub-board. One of them is used for communication CAN bus and Ethernet. It provides analog and digital I / O through each of the slots is used for control and monitoring.

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.6
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• pp.1339-1345
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• 1989

본 연구에서는 앞에서 개발된 온도 제어 시스템을 더욱 소형 경량화하기 위해 서 일반 마이크로 컴퓨터 대신에 원보드 마이컴(one-board micom)을 사용하였다. 원보드 마이컴은 프로그램을 기계어로 작성해야하는 어려움이 있으나 가격이 저렴하고 주변장치가 필요없으며, 크기가 작아 제어시스템을 소형경량화 시킬수 있는 장점이 있다.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.675-685
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• 2020

The main purpose of this study is to investigate the potential effect of ownership concentration on the relationship between board composition and bank performance. The study employs a sample of Saudi banks listed on Saudi stock exchange (TADAUWL) over the period from 2011 to 2018. To test the study hypotheses and control for endogeneity issues, the Ordinary Least Square (OLS) and the Two-Stage Least Squares (2SLS) techniques are used. The empirical results reveal a significant negative moderating effect of ownership concentration on the association between board composition and bank performance, which confirms the study argument and supports hypotheses. The results indicate that board composition in terms of independent board members, executive board members, and non-executive board members in banks with higher ownership concentration have a weaker positive influence on bank performance. For control variables, the results are almost consistent with theoretical perspectives and previous empirical evidence. The results of this study have important implications for regulatory authorities, companies, and market participants in Saudi Arabia and countries with high concentrated ownership to understand how ownership concentration could affect corporate governance and firm performance and to identify appropriate actions to protect board composition from the influence of ownership concentration.

• Proceedings of the KIEE Conference
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• 2001.07b
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• pp.1220-1222
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• 2001

We proposed a modularization design technique for implementing software of on-board train control system. We already proved the efficiency of CASE Tool(SCADE) for safety critical software design. The several functions of train are implemented on CASE tool each modules. We divided functions of train into modules based on the modularization design. We used MATLAB for design of on-board train control software. We proved that this technique is more useful for the software design of on-board train control for EMU.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1023-1026
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• 2007

CBTC (Communication Based Train Control) is a railroad system, using wireless communication for data transmission between on-board units and ground units, that makes ground computer periodically collect position and speed data from each train and transmits the preceding train's distance data up to speed limit point so as to make on-board control unit control the optimum train speed. Due to the fact that wireless communication system for train control employs only limited frequency band and output frequency, a number of ground communication units should be installed at track-side; also a running train should carry out Handover function which maintains the communication by accessing a new communication channel of the adjacent on-board communication units in accordance with the output of received radio wave. Especially CBTC is largely dependent on Handoff function between ground communication units. Therefore, this paper provides the method of identification of hazard between ground communication units and on board units.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.49 no.10
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• pp.675-682
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• 2000

An easier implementation method of the field oriented control of induction machine using Matlab/Simulink and dSpace board is proposed in this paper. The total system for the control of induction motor is modeled with the help of Matlab/Simulink. These models consist of induction motor block, SVPWM inverter block and control algorithm block, etc. And this system is simultaneously simulated and experimented in Matlab/Simulink environment with dSpace borad (DS1102). It is possible that Matlab and dSpace board compiler can make $^'{\ast}.c'\;and\;^'{\ast}.obj'$ file of models designed in Matlab/Simulink environment automatically. Both Simulation and experimental results are given.

• Journal of the Korean Institute of Oriental Medical Informatics
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• v.11 no.2
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• pp.57-64
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• 2005

Objectives The aim of this study is to evaluate effects of hard board applied to acute low back pain patient by using Visual Analogue Scale(VAS) and Pain Rating Score(PRS). Methods From March. 2005 to October. 2005, 20 cases of acute low back pain were divided into 2 groups in sequence. Control group took a rest on the bed(marble-sponge mattress) and sample group took a rest on the hard board. Visual Analogue Scale(VAS) and Pain Rating Score(PRS) were used to assess the change of pain. VAS and PRS were checked 3 times before the treatment, after 3day treatment and 6day treatment. Results 1. After 3day and 6day treatment, there was statistical significance between control and sample group by VAS. 2. After 3day and 6day treatment, there was statistical significance between control and sample group by PRS. Conclusions On treating acute low back pain, it is more effective taking a rest on the hard board than taking a rest on the bed. Further study is needed about effects of hard board applied to acute low back pain patient.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1465-1469
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• 2003

In general satellite verification process, the AOCS (Attitude & Orbit Control Subsystem) should be verified through several kinds of verification test which can be divided into two major category like FBT (Fixed Bed Test) and polarity test. And each test performed in different levels such as ETB (Electrical Test Bed) and satellite level. The test method of FBT is to simulate satellite dynamics with sensors and actuators supported by necessary environmental models in ETB level. The VDS (Vehicle Dynamic Simulator) try to make the real situation as possible as the on-board processor will undergo after launch. The purpose of FBT test is to verify that attitude control logic function and hardware interface is designed as expected with closed loop simulation. The VDS is one of major equipments for performing FBT and consists of software and hardware parts. The VDS operates in VME environments with target board, several commercial boards and custom boards based on the VxWorks real time operating system. In order to make time synchronization between VDS and satellite on-board processor, high reliable semaphore was implemented to make synchronization with the interrupt signal from on-board processor. In this paper, the real-time operating environment used on VDS equipment is introduced, and the hardware and software configurations of VDS summarized in the systematic point of view. Also, we try to figure out the operational concept of VDS and AOCS verification test method with close-loop simulation.

• Journal of the Korea Convergence Society
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• v.10 no.12
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• pp.1-6
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• 2019

In this paper, we have developed an app that can control IPTV - Miracast and the Internet with Android 7.0 on the embedded board. The app can be controlled by the remote control of IPTV and can receive TV when using IPTV. And Miracast and Embedded board are put into the power saving mode. When one mode is selected in this way, the other two modes enter the power saving mode and the power saving control technology is applied to reduce energy consumption. The board used in this paper was Android version 7.1.2 version of Raspberry pie 3B / B + and Asus Tinker board s, and Android Studio program was used to make the app and a synchronization control program was also developed to operate with IPTV remote control. The operation of the Android start program using the power saving power control technology and the remote control synchronization control program developed in this way is confirmed to be normal operation as a result of applying to the actual IPTV.