• 한국컴퓨터산업학회논문지
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• 제2권12호
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• pp.1541-1548
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• 2001

본 논문에서는 IETF CAT Working Group에서 발표한 PKINIT 기반의 인증서비스를 향상시킨 Kerberos 인증 메커니즘을 제안한다. 서비스를 위한 상호 영역간 인증은 X.509와 DS/DNS를 이용하는 PKINIT를 통한 체인에 의해서 연결하였다. 영역간 서비스를 위해 공통키와 공개키를 사용하며 실제적인 인증은 Kerberos의 공통키에 두고 PKINIT의 X.509는 공개키를 이용하여 세션을 설정하였다. 새로운 메커니즘은 원격영역에서 티켓을 얻기 위하여 KDC의 인증서 사용으로 Client와 원격 KDC간 인증절차를 간소화시킴으로써 통신부담을 줄이고 원격 KDC의 재확인 과정이 생략되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제34권3호
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• pp.376-382
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• 2010

These days, a study on 'Unmanned Surface Vehicle (USV)' has made very active progress in many countries. Even if it is being expected that there will be a great demand of USV for wide field, such as military operation, private sector, and etc., the study of USV in Korea is still at an early stage. For this reason, we have made a very small USV which is composed of dual mode (autonomous and remote control). The TCP/IP communication is applied to the USV.

• Journal of information and communication convergence engineering
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• 제18권2호
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• pp.115-122
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• 2020

Audiovisual (AV) facilities such as TVs and signage are installed in various public places. However, audio cannot be used to prevent noise and interference from individuals, which results in a loss of concentration and understanding of AV content. To address this problem, a total technique for remotely listening to audio from audiovisual facilities with clean sound quality while maintaining video and lip-syncing through personal smart mobile devices is proposed in this paper. Through the experimental results, the proposed scheme has been verified to reduce system power consumption by 8% to 16% and provide real-time processing with a low latency of 120 ms. The system described in this paper will contribute to the activation of audio telehearing services as it is possible to provide audio remote services in various places, such as express buses, trains, wide-area and intercity buses, public waiting rooms, and various application services.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.905-907
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• 2005

In this paper, we propose the system that can monitor and control the camera in the remote place using the PDA. The server PC attached to the PLC (Programmable Logic Controller) acquires the current status (On/Off) of the devices through the RS-232 serial communications. Also, the moving image frames captured from the wireless camera is compressed in the JPEG format and is stored in the server. The PDA, which is connected to the server through wireless internet, receives the data about the status of the devices and controls the devices according to the circumstances of them. Also, it can receive the images from the server simultaneously. So, we ran monitor and control the specified area in the remote place using the PDA through the wireless communication.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.3117-3119
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• 2005

In this paper, we propose the system that can monitor and control the camera in the remote place using the PDA. The server PC attached to the PLC (Programmable Logic Controller) acquires the current status (On/Off) of the devices through the RS-232 serial communications. Also, the moving image frames captured from the wireless camera is compressed in the JPEG format and is stored in the server. The PDA, which is connected to the server through wireless internet, receives the data about the status of the devices and controls the devices according to the circumstances of them. Also, it can receive the images from the server simultaneously. So, we can monitor and control the specified area in the remote place using the PDA through the wireless communication.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.290-293
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• 2006

COMS (Communication, Ocean and Meteorological Satellite) shall be operated with two remote sensing payloads, MI (Meteorological Imager) and GOCI (Geostationary Ocean Color Imager). Since both payloads have rotating mechanisms, the dynamic coupling between two payloads is very important considering the pointing stability during GOCI operation. In addition, COMS adopts a single solar wing to improve the image quality, which leads to the unbalanced solar pressure torque in COMS. As a result, the off-loading of the wheel momentum needs to be performed regularly (2 times per day). Since the frequent off-loading could affect MI/GOCI imaging performance, another suboptimal off-loading time needs to be considered to meet the AOCS design requirements of COMS while having margin enough in the number of thruster actuations. In this paper, preliminary analysis results on the pointing stability and the wheel off-loading time selection with respect to MI/GOCI operations are presented.

• 전자공학회논문지SC
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• 제43권1호
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• pp.7-12
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• 2006

본 논문에서는 근거리 및 광역 무선 데이터 통신 상호 연동을 통한 실시간 원격 감시 시스템을 설계 제안하였다. 근거리 망은 소출력 무선 통신용 모듈을 사용하였고 광역망은 CDMA Cellular System의 Packet Data Service를 이용하여 구현하였다. Sensor Unit에서 수집된 데이터는 Data logger를 경유하여 Host computer로 전송되어 인터넷 망을 통하여 윈격 감시 제어 된다.

• International journal of advanced smart convergence
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• 제6권1호
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• pp.68-75
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• 2017

In this paper, a particular application of digital photos, remote sensing, remote shooting air moving, high-resolution and high compression of medical images required by remote shooting of JPEG2000 standard applied in the field of hardware design, production was implemented. JPEG2000 standard for image compression using the software implementation of the processing speed is very slow compared to conventional JPEG disadvantages, and also the standard of JPEG2000 DWT (Discrete wavelet transform) to improve the level of compression for image data if processing speed is a phenomenon that has degraded. In order to solve these JPEG2000 compression / decompression groups were designed and applied. In this paper, the optimal JPEG2000 compression / reservoir hardware by changing the level for still image compression, faster computation speed and quality has shown improvement.

• 한국정보통신학회논문지
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• 제7권5호
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• pp.949-954
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• 2003

본 연구에서는 지금까지의 GUI 중심의 웹 어플리케이션을 VUI 중심의 웹 어플리케이션으로 구현하기 위한 음성 인식 항공 정보 시스템을 설계 구현하였다. 이러한 ASP(Active Solver Page)로써 구현한 윈도우 서버 기반에서 운용되는 시스템에 관한 Web 관련 ASR(Automatic Speech Recognition)연구가 최근 상당한 연구가 이루어지고 있지만 ASP의 웹과의 제한성으로 인해 시스템의 속도면, 이식성 등에서 제약을 가져왔다. 이와 같은 제약성을 해결하기 위해 본 연구에서는 음성 정보 및 동적 VoiceXML을 구현하는 자바 빈즈(JAVA Beans) 컴포넌트 구조에 대해서 연구하였다. 또한 본 연구에서는 Remote An(Abstract Windows Toolkit)기술을 이용하여 GUI 및 VUI 에서의 음성 및 그래픽 정보를 동시에 전달 가능하게 하는 Voice 웹 브라우징의 가능성을 확인하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.124.2-124
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• 2001

The research for development of remote monitoring and control systems composed three stages of research categories. At the first stage, we decided the suitable instrumentation devices for interface between H/W systems and waste water treatment facility. And at the second stage, we developed the software package for remote monitoring and data transmission system including data receipt system via wired telephone line. At the final stage we developed local control system for auto-process control of waste water treatment facilities. For the first stage of research we developed the a drawing of design the instrumentation and selected optimal sensors or monitoring basic important data. After the first stage research we developed the software package with Graphic User Interface(GUI) ...