• Proceedings of the KIEE Conference
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• 2005.07d
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• pp.3072-3074
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• 2005

In this paper, web based monitoring systems are implemented for multi-axis force control systems of an intelligence robot. A web based monitoring system is implemented by porting Linux at embedded systems which include a Xscale processor. A device driver is developed to receive data from multi-axis force sensors in Linux operation systems. To control this device driver, a socket program for the Labview is also developed.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.945-948
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• 2007

시리얼 통신은 다양한 분야의 임베디드 시스템에서 사용되는 통신 시스템의 일종이다. ${\mu}C/OS-II$는 실시간 임베디드 시스템에 사용되는 실시간 운영체제이다. S3C2440A 는 이러한 임베디드 시스템에 사용되는 마이크로 프로세서로 칩에 집적 된 UART 를 통하여 시리얼 통신을 지원한다. 이 논문에서는 시리얼 통신 중 ${\mu}C/OS-II$ 기반의 실시간 시스템을 위한 시리얼 통신의 설계와 S3C2440A로의 포팅을 한다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2380-2382
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• 2004

In this paper, Web server is built up using PXA255, 32bit RISC processor with porting Embedded Linux and GoAhead, HTTP(Hyper Text Transfer Protocol) web server, and the system with can monitor and control the environment and condition for AICC(Automatic Intelligent Cruise Control) is realized. For sending the operation condition and change of vehicle the desired data is derived by interacting ECU(Electric Control Unit) and Embedded system and the rpm of engine is controlled by step motor connected to throttle value.

• The Journal of the Acoustical Society of Korea
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• v.25 no.4E
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• pp.137-141
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• 2006

This paper presents HE-AAC decoder optimization on TMS320C55x fixed-point DSP core using a DSP-C like FFR code, which provides fast and flexible porting to a DSP core. Our optimization efforts are focused on methodologies that include general optimization methods of FFR code suitable for general DSP or RISC platform in high-level language and software optimization methods in assembly language level. The implementation result requires 48 MIPS and 135 Kbytes memory space to decode 48 Kbps stereo using real Korean S-DMB data.

• Proceedings of the IEEK Conference
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• 2002.06c
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• pp.83-86
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• 2002

This paper intends to provide convenience to the disabled, losing the use of their limbs, through voice recognition technology. The voice recognition part of this system recognizes voice by DTW (Dynamic Time Warping) Which is most Widely used in Speaker dependent system. Specially, S/N rate was improved through Wiener filter in the pre-treatment phase while considering real environmental conditions; the result values of 12th order feature pattern per frame are extracted by DTW algorithm using LPC and Cepsturm in feature extraction process. Furthermore, miniaturization is pursued using TMS320C32, 71's the floating-point DSP, for the hardware part. Currently, 90% of hardware porting has been completed, but we can confirm that the recognition rate was 96% as a result of performing the DTW algorithm in PC.

• Journal of Advanced Marine Engineering and Technology
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• v.28 no.5
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• pp.811-817
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• 2004

Recently embedded systems are widely used in various industrial fields as supervisory controller because they have many merits. One of merits seems to be that operating environment of embedded system is the same as development environment using PC. That makes developing and manufacturing period shorten and also proper time to market Most of all machinery have sequential control system for their maneuvering which is composed of relays. contacts. timers. etc. In this paper. software sequential control system is proposed to be able to replace hardware sequential control system by using embedded system A lot of merits by the software sequential control system can be expected in the respect of economic reproduction, intelligent technologies and utilities, And porting of LINUX operating system to embedded system is carried out and device drivers and interface boards for LINUX 05 are designed for controlling air compressor by software Internet remote control and monitoring system of air compressor is implemented with Java script and CGI for these purposes. The experiment for operating air compressor system is taken through internet networks. The results show that developed system can be used for real plant.

• 한국컴퓨터산업교육학회:학술대회논문집
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• 2003.11a
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• pp.49-54
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• 2003

In this work, we have seen the effect of hole-transporting layer in organic light-emitting diodes using N,N'-biphenyl-N,N'-bis-(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine(TPD) and N,N'-biphenyl-N,N'-bis-(1-naphenyl)-[1,1'-biphenyl]-4,4'-diamine(NPB). NPB is regarded as a better hole trans porting material than TPD, since it has a higher glass transition temperature$(T_g)$. And current -voltage, luminance-voltage and external quantum efficiency of device were measured with the thickness variation of buffer layer using copper phathalocyanine(CuPc) and polytetrafluoroethylene (PTFE) at room temperature. We have obtained an improvement of External quantum efficiency when the CuPc 30[nm] and PTFE 1.0[nm] is used.

• Journal of the Korean Society of Costume
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• v.33
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• pp.89-104
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• 1997

The purpose of this study is to analize the introduction statues of a license brand and an importing brand from the foreign clothing companies then suggest the preparation to win in competition The suggestions are as followings ; 1, Develop the own brand which meets orig-inal concept. 2. Avoid an indiscreet and unplanned im-porting of foreign brand clothing. 3. Need consistant investigation of con-sumer's purchasing trend. 4, Instead of importing foreign brand re-quire discrete strategy of its own devloped B.(Private Bradn) clothing of department store. 5. To prepare for fast changing in a distri-bution market need education program for experts. 6. Develop various distribution companies that can provide convinece to customers.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.809-812
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• 2003

가상 기계는 다양한 종류의 플랫폼에 대한 독립성을 지원하는 프로그램 실행 환경으로서 로더/링커, 인터프리터 및 가상 기계를 특정 시스템에 탑재하기 위한 어댑터로 크게 구성되어 있다. 본 논문에서는 가상 기계를 특정 시스템에 효율적으로 탑재하기 위한 어댑터를 개발하기 위해 기존 가상 기계의 탑재 부분을 고찰한 후 멀티플랫폼에 효과적으로 탑재할 수 있는 어댑터를 설계하였으며 제안된 어댑터는 정의 부분, 주 어댑터, 네이티브 인터페이스 부분으로 구성되어 있다. 또한 어댑터 개발시에 장치 특성, 입출력 등을 위한 API 작성에 필요한 요소들을 제시하였다.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.439-440
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• 2017

최근 다양한 분야에서 IoT(Internet of Things)를 위한 마이크로 컨트롤러 디바이스가 사용되고 있다. BLE 통신을 통한 전력소모감소로 인해 작은 크기에서 다양한 기능을 수행할 수 있게 되었으며, 이를 위해 마이크로 컨트롤러에서 RTOS가 사용되는 분야가 늘어나고 있다. 본 연구에서는 국내 기술로 개발된 iRTOS를 IoT 디바이스에 포팅하는 연구를 수행한다. Cortex-M 시리즈를 위해 내부 컨텍스트 관리 및 RTOS 타이머 관련 내용을 수정하여 포팅하였다.