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강종규(Kang Jong Gyu),박상우(Park Sang Woo),김현숙(Kim Hyun Suk),김계환(Kim Kye Hwan),진성일(Jin Seong Il) 한국정보처리학회 1997 정보처리학회논문지 Vol.4 No.3
To construct distance learning servers and provide their services using the WWW(World Wide Web), it is necessary that we use a real-time processing method rather than the processing after downloading method for multimedia data transaction and their processing. To fulfill such requirements, we developed a real-time processing module for distance education which can process multimedia data in AVI and WAV formats in distributed environments. We in turn developed a real-time WWW server that can provide real-time services of hypertext and motion pictures data in terms of adding the real-time processing module to the MuX framework and integrating them with WWW. We finally developed a distance learning system for real-time interactive Chinese Character learning, based on the results from the previous steps.
강종규(Jong-Gyu Kang),김계환(Kye-Hwan Kim),조성빈(Sung-Been Cho),진성일(Seong-Il Jin) 한국정보과학회 1997 정보과학회 컴퓨팅의 실제 논문지 Vol.3 No.5
웹 서비스 방식은 멀티미디어 데이타를 모두 클라이언트 영역으로 다운로드 받고 난 후에 외부의 매체 재생기를 통하여 재생하기 때문에 실시간 처리가 되지 않는다. 본 논문에서는 AVI, MPEG등의 멀티미디어 데이타를 프레임 단위로 읽어들여 스트림화하고 네트워크를 통하여 전송 및 디스플레이하기 위한 멀티미디어 데이타 입출력 DLO(Dynamic Linking Object)를 개발하여 웹 서버와 연동하므로써 인터네스 상에서 실시간으로 동영상 데이타 서비스가 가능한 실시간 웹 서버 모델을 제시하고 구현하였다. The WWW(World-Wide Web) service can not process multimedia data in real-time because it has to download multimedia data to the clients local storage and then playbacks them using an external media player. In this paper, we introduced the multimedia input/output DLO(Dynamic Linking Object) for AVI and MPEG. The DLO reads multimedia data in frame unit and makes them streams, transfer them via the network and make them displayed. By integration DLO and a web server, we obtained enhanced web server and could make the multimedia data processed in real-time.
능동자기베어링 시스템의 제어기 설계 및 불균형 진동 분석
강종규(Kang jong-gyu),신우철(Shin woo-cheol),홍준희(Jun-hee Hong) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.10
Active magnetic bearings (AMB's) have become practical in many industrial fields and numbers of studies for magnetic bearing systems have been reported. However, AMB systems are open-loop unstable and thus require feedback control for robust stabilization and performance. In this paper, first, a rotation of the rotor around the inertial axis is considered and a rigorous modeling of a magnetic bearing system in which the rotation of the rotor is on its axis of inertia is developed. Next, to stabilize the AMB system a PID controller is used and experimentally analyze its rotational response.
자기베어링시스템 강성의 실험적 고찰을 통한 안정화 특성에 관한 연구
강성구(Seong-gu Kang),강종규(Jong-gyu Kang),홍준희(Jun-hee Hong) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.10
Due to the lack of stiffness and difficulties of control, it is hard to achieve well balanced magnetic levitation. In this paper, we analysis the current and position stiffness change according to bias current through experiment. Then, compensation equations were presented. After obtaining PD gain for each bias current and PD gain region through levitation experiment, we consider the characteristics.
In - Place 갱신과 Shadow 갱신 기법을 혼용한 주기억장치 데이터베이스 시스팀
김성혜(Kim Sung Hei),강종규(Kang Jong Gyu),진성일(Jin Seong Il) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.1
본 논문에서는 새로운 기법의 주기억장치 데이터베이스(MMDB) 시스팀을 제안한다. 본 시스팀에서 제안하고 있는 트랜잭션 처리기법은 트랜잭션 갱신시 In-Place 갱신과 Shadow 갱신을 혼용하면 트랜잭션 처리가 효율적으로 이루어진다. 그리고 Fuzzy 체크포인트를 사용하고 있어 체크포인팅이 간단하게 이루어지면서 트랜잭션 처리에 주는 영향을 최소화 하였다. 또한 이 시스템에서 적합한 회복기법을 제안한다.
광파이버 변위 센서를 적용한 자기베어링 정적 부상 제어 연구
강종규,신우철,홍준희 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
Five expensive sensors are necessary to control a magnetic bearing system. The sensor price rate of magnetic bearing system is high. So it is necessary that cheap and good sensor is developed. The optical fiber displacement sensor is adaptive to satisfy this condition. We can design magnetically suspended spindle based on static characteristic of optical fiber displacement sensor developed. The controller can be designed by decoupled feedback PD. Therefore, it is simpler than any other controller comparatively.
LINEAR RECURSIVE QUERY의 효율적 처리를 위한 algorithm에 관한 연구
강종규,진성일 충남대학교 자연과학연구소 1987 忠南科學硏究誌 Vol.14 No.1
First-order database is defined as a function - free first - order theory. First -order database consists of the extensional database (EDB) and the intensional database (IDB). Henschen and Naqvi(HN algorithm), Wavefront algorithm,σ-Wavefront algorithm and counting method were developed for the efficient processing of first - order database queries in case of Transitive Closure queries(TC) and Single Looping rule and Single Recursion point (SLSR). We could develop an algorithm, so called, level counting which optimized the HN algorithm using counting method and σ-Wavefront algorithm, so we could reduce the redundancies and give the correct answer and guarantee the termination.
광파이버 변위 센서를 이용한 자기베어링 계의 부상 제어
강종규,신우철,송관의,홍준희 충남대학교 공업교육연구소 2003 論文集 Vol.26 No.1
Five expensive sensors are necessary to control a magnetic bearing system. The sensor price rate of magnetic bearing system is high. So it is necessary that cheap and good sensor is developed. The optical fiber displacement sensor is adaptive to satisfy this condition. We can design magnetically suspended spindle based on static characteristic of optical fiber displacement sensor developed. The controller can be designed by decoupled feedback PD. Therefore, it is simpler than any other controller comparatively.