• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.115_116
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• 2009

IEC 61850 based substation automation system mainly consists of a various of protective and control IEDs. In order to implement the system, All of them should require the performance verification of IEC 61850 communication services for the assurance of interoperability throughout the digital network. This paper shows a research result on the testing method of IEC 61850 control communication interface of IEDs according to IED IEC 61850 conformance test procedures.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.250_251
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• 2009

IEC 61850 based substation automation system mainly consists of human machine interface as a client and a various of IEDs as a server. Both of them should require the field testing for performance verification including IEC 61850 communication services. This means that the test can assure the interoperability of IEC 61850 based substation automation system consisted of multi vendor's products. This paper shows a research result on the field test of the IEC 61850 based HMI and IEDs. And it proposes some engineering solutions for the system implementation.

• International Journal of Automotive Technology
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• v.8 no.3
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• pp.327-335
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• 2007

A new optimization scheme and some key techniques are proposed in the development of a vehicle glass drop design software system. The key issues of the design system are how to regenerate the glass surface and make the vehicle glass drop down along the glass channels. To resolve these issues, a parameterized model was created at first, in which the optimizing method and Knowledge Fusion techniques were adopted the optimized process was then written into the glass drop design system by coding with C language and UGS/Open Application Programme Interface functions etc. Therefore, the designer or engineer can simulate the process of glass dropping along the channels to assess the potential interference between glass and door accessory by using this software system. All of the testing results demonstrate the validity of the optimizing scheme, and the parametric design software effectively solves the key issues on development of the door accessory package.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.3
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• pp.645-654
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• 2009

In this study, we present an efficient ambulatory speech audiometric system to detect one's hearing problems at an earlier stage as possible without his or her visit to the audiometric testing facility such in a hospital or a clinic. To estimate a person's hearing threshold level in terms of speech sound response in his or her local environment, a digital assistant(PDA) device is used to generate the speech sound with implementing audiometric Graphic User Interface(GUI) system. Furthermore, a supra-aural earphone is used to measure a subject's hearing threshold level in terms of speech sound by the compensating the transducer's gain by adopting speech sound calibration system.

• Journal of Information Technology Services
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• v.12 no.3
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• pp.379-387
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• 2013

This paper describes a scheme of motor control for Quadcopter with Android phone instead of a dedicated controller. Basically, user's requests (channel and speed) are inquired and transferred to the Quadcopter with Android phone, then the embedded Linux system receives them and controls the motor speed of corresponding channel. We have designed and implemented an App. for user interface and the modules of device driver and timer ISR for the motor control. Finally, we have up-loaded the App. and the modules to an Android (ver.4.0) phone and ARM processor (S3C6410)-based embedded board respectively, and reviewed the functional correctness by testing the motor control of Quadcopter.

• Proceedings of the KIEE Conference
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• 2005.05a
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• pp.155-157
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• 2005

The Electrical Test Bed(ETB) integrates the test environment, required for acceptance tests of system level, prior to FM testing. The ETB will be used for the validation of system-level functions and interface between each subsystem. The FTB supports early functional and limited performance checkout of electrical subsystems. Therefore, it provides the environment for the verification of the Flight Software including AOCS, EPS, and TC&R simulators. These ETB will be composed of engineering version of spacecraft BUS, which are laid on the laboratory table.

• Proceedings of the KWS Conference
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• 2002.10a
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• pp.463-468
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• 2002

This study investigates the variations of shear force, displacement, and fracture surface with the shear speed and the number of reflows. The experimental data of shear tests indicate that the shear force increases as increasing the number of reflows and the shear speed due to the formation of a kind of intermetallic compound, Ni$_3$Sn$_4$, on Au/Ni/Cu pad, and the work-hardening. However, general trends show that the shear force decreases due to increasing the thickness of the intermetallic compound over 4x reflow. It is observed that the intermetallic compound which is formed between solder and pad increases according to increasing the number of reflows, and the growth rate of the intermetallic compound at central region on the interface is faster than one at edge part. The general tendencies of shear force and displacement with different shear speeds are almost identical as an increase of the number of reflows.

• Journal of the Ergonomics Society of Korea
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• v.22 no.3
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• pp.93-111
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• 2003

This research extends a general theory of cognition to address cognitive constraints on complex command production and allows us to make system design recommendations. The research described in this paper addresses the cognitive origins of problems user have producing sequence-dependent command strings while interacting with the UNIX operating system. We describe an empirical and theoretical analysis of user difficulties, and then show how our analyses lead to design recommendations. In addition, we summarize results from testing the impact of our design recommendations on system usability

• Proceedings of the IEEK Conference
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• 1998.06a
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• pp.839-842
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• 1998

The wide spread of multimedia system demands a large viewin gdesply device which can inform a message to many peoples in open area. This paper is about the design, simulating and testing of a large viewing LED pannel control ASIC(application specific integrated circuit). This LED pannel control ASIC runs on 16 bit microprocessor MC68EC000 and has following functions:16 line interlaced LED pannel controller, memory controller, 16 channel priority inerrupt controller, 2 channel direct memory access controller, 2 channel 12 bit clock and timer, 2 channel infrared remocon receiver, 2 channel RS-232C with 16byte FIFO, IBM PC/AT compatible keyboard interface, battery backuped real time clock, ISA bus controller, battery backuped 256 byte SRAM and watech dog timer. The 0.6micron CMOS sea of gate is used to design the ASIC in amount of about 39,000 gates.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.367-374
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• 2007

금융 상품의 교차 판매, 복합 매장에서의 금융서비스 제공 등 판매 채널의 다각화, 인터넷 뱅킹, 모바일 뱅킹 등의 비대면 채널의 약진 등은 금융 산업에서의 유통 혁명을 예고하고 있다. 이제 ATM(Automatic Teller Machine: 현금자동지급기)을 통한 금융 거래는 단순한 결제 수단 및 현금 처리의 차원을 넘어 복합적인 종합 금융 서비스를 담당하는 원스톱 금융 서비스 제공 거점으로 새로이 자리매김하게 될 것이다. 하지만, 현재의 ATM에는 사용자와의 인터랙션을 중심으로 하는 여러 문제들이 도사리고 있다. 따라서, 시장 변화의 요구에 맞추어 기능을 발전시키기 위하여, 사용자의 복합적인 요구를 충족시킬 수 있는 ATM의 기능 설계 및 인터페이스 디자인이 요구된다. 본 논문에서는 사용자 인터뷰를 통하여 현행 ATM의 인터페이스가 사용자들에게 야기하는 불편 요인들을 찾아내고, 그에 대한 대안적 인터페이스를 설계하고, 사용자 평가를 통해 그 실효를 확인하여, 궁극적으로는ATM사용자 중심 인터페이스 표준의 구축을 시도하고자 한다.