擬似不規則 2維信号를 利用한 無定位性系統 同定

崔京三 대한전기학회 1973 대한전기학회 워크샵 Vol.1973 No.8

홈 네트워킹 시스템 구현에 관한 연구

崔京三 弘益大學校 科學技術硏究所 2004 科學技術硏究論文集 Vol.15 No.-

In this paper, we have designed a home networking system using an embedded LINUX board. The system based on the World-Wide-Web is composed of three parts - a Server, a Client and a Simulator. The home networking server is built in an embedded board based on the LINUX kernel. The web server and Home Networking Server Service Demon programs are installed in the board using the Java-Language. Clients may connect to the server using any desktop computers, any PDAs or any other machines which include any web-browsers. For this purpose, the client service programs are composed of Java-Applets. The clients who connect to the server for the control of the applications, download the class-file automatically and execute the client-program in the web-browser. So, the clients don't need any other programs to control the applications from a remote place. The size of server board is very small (86.3x74mm), which makes it very useful not only for the home networking system but also in many other fields, e.g., embedded robot control system, etc. In many fields, using an embedded board instead of a desktop computer will make the network environment very simple, since it occupies only a small space to install the system and doesn't need any maintenances.

이동로봇에 장착된 Stereo Vision을 이용한 이동인식에 관한 연구

崔京三,李基聖 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

Among the several sensors used in mobile robots, the computer vision is most useful in modeling for the cognition in 3-D real world. Because the computer vision requires much complex computation, it is hard to use for controlling a system in real time mode. In this paper, the movement of robot for cognition is divided into 8 categories. The proposed algorithm for cognition of position of objects and movement of robot by the real time image processing is studied. Also, the vertical line extraction method using parallel coordinates is proposed. And the algorithm for cognizing movements classifies the movement of objects into 4 directions; set right-left and forward-backward. The aim of this algorithm is to show the real time processing and low cost implementation for low level capacity systems. The Lab experiments were performed to show that the algorithm yields faster and more simple than ready-made algorithm in normal lights and other DT system like GPS.

개선된 MGCP 프로토콜을 이용한 인터넷 음성 통화 구현에 관한 연구

崔京三 弘益大學校 科學技術硏究所 2002 科學技術硏究論文集 Vol.13 No.-

In this paper, A modified MGCP call setup protocol for the voice conference in Internet is studied. This modified MGCP embodies the call setup model of a conference call, and very similar to the standard MGCP. So, this modified protocol may conference with devices where standard MGCP is installed. The only difference from the standard MGCP is that it has a GROUP concept for the conference. And the conference call setup is constructed on a GROUP base. IP multicast and RTP ( Real-time Transfer Protocol ) are used for the realization of conference call control. IP multicast is a solution of network traffic problem caused by a conference, because multicasting is a one to many communication, and RTP is a solution of reducing network delay during the voice data transmission.

離散値形 線形制御系統의 最適狀態推定 方法에 관한 一硏究

崔京三 弘益大學校 1975 弘大論叢 Vol.7 No.-

In this paper, a comparative study on the state estimation is made by means of the filtering problem in the linear discrete control systems with state and measurement noises, from the standpoint of least square fit, maximum likelihood, and Bayesian approach. The optimal state estimator for linear dynamic control systems is derived in the sense that the variance of the errors is minimized. The effectiveness of the optimal estimator is proved through the numerical example by digital computer.

[특집 : 후기산업사회와 인간의 문제] 超産業化社會의 實在와 展望

최경삼 한국인문사회과학회 1978 현상과 인식 Vol.2 No.3

능란한 로봇 손의 운동을 위한 알고리즘 개발 및 구현에 관한 연구

崔京三,李鍾洙 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

This study is performed by experiments with master hand and slave hand. These hands are very similar to human hands because these hands have the twenty degree of freedom and five finger. Master hand plays a part as a tool of getting grasping data and learning grasping algorithm, and slave hand which is multi-fingered robot hand performs the algorithm. Experiments assume that all informations of grasped objects is known. Several subjects put on the master hand and grasp the objects of various shape and size. By using the data from the master hand, we analyze the patterns of grasping of human hands. After analyzing grasping patterns, we generalize grasping of each case and analogize algorithm of grasping. We prove two facts by appling this algorithm to slave hand. One is that the slave hand is multi-fingered robot hand which can perform dexterous manipulation and the other is that we prove the validity of this algorithm.

뇨 크레아틴에 의한 스포츠 마사지 실시 전, 후의 신체조성비교

최경삼,박형하,박판수 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

본 연구는 스포츠 마사지가 신체조성에 미치는 영향에 대한 기초 자료를 제공할 목적으로, 7명의 남학생을 대상으로 6주간의 스포츠 마사지 실시 전 후에 따른 뇨 크레아틴의 량과 농도의 변화를 측정한 결과, 다음과 같은 결론을 얻었다. 1) 뇨 크레아틴 농도는 스포츠 마사지 실시 전 0.63mg/ml 에서 스포츠 마사지를 실시 6주 후 0.87mg/ml로 약 0.24mg/ml 정도 증가하였으며, 스포츠 마사지 전 후 통계적으로 유의한 차이를 나타내었다(p<.01). 2) 뇨 크레아틴량은 스포츠 마사지 전 1,398mg/day에서 스포츠 마사지 6주 후 1,584mg/ day로 약 188mg/day 증가하였으며, 스포츠 마사지 전 후 통계적으로 유의한 차이를 나타내었다(p<.01). 3) 크레아틴법에 의한 제지방체중(FFM)은 스포츠 마사지 실시 전 52.55kg에서 스포츠 마사지를 실시 6주 후 57.25kg으로 4.70kg 정도 증가하였으며, 스포츠 마사지 전 후 통계적으로 유의한 차이를 나타내었다(p<.01). 4) 크레아틴법에 의한 체지방은 스포츠 마사지 전 17.02kg에서 스포츠 마사지 실시 6주 후 11.25kg으로 약 5.77kg의 체지방이 감소하였으며, 스포츠 마사지 전 후 통계적으로 유의한 차이를 나타내었다(p<.05). 5) 체중은 스포츠 마사지 실시 전 69.57kg에서 6주간의 스포츠 마사지 후 68.50kg으로, 약 1.07kg의 체중의 감소를 나타내었으나, 스포츠 마사지 전 후 통계적으로 유의한 차이를 나타내지 않았다.

프랙탈 이론을 이용한 영상압축 및 확대 알고리즘

李鍾洙,崔京三 弘益大學校 科學基術硏究所 1998 科學技術硏究論文集 Vol.9 No.2

Digital image zooming is the problem of finding out the most similar information to an original one from a shrinked information available. This paper presents a digital image compression and zooming algorithm using the Fractal theory that has the property of ˝Self-similarity˝. Self-similarity is the property that a certain part of an image is similar to some other part in that image. To reconstruct a part of the image, we must change the position and the grey-level information of the other similar part to affine-transform coefficients and store them. An approximate image can be reconstructed by adapting this transform to an arbitrary image and a zoomed image can be aquired by adapting this transform to a larger image. This paper suggests a modified affine transform that does not diverse when the contrast adjustment is larger than, 1 and this algorithm guarantees a better reconstruction of image. Simulation results show that the proposed algorithm gives better restoration results comparing to the convention-al LI(Linear Interpolation) and NNI(Nearest Neighbor Interpolation) methods.

로보트의 실시간 動態제어방식

李鐘洙,崔京三 弘益大學校 1986 弘大論叢 Vol.18 No.2

A new dynamic control algorithm for the position control of robot manipulators is proposed. This algorithm consists of an open loop control and a closed loop control. The former is a recursive Newton-Euler algorithm of the desired trajectory, and the latter is a VSS type control. The important role of an open loop control is the compensation of nonlinear dynamic couplings among joints in order to reduce the lower bound of gains of a closed loop control. This algorithm is robust to the modelling inaccuracies, parameter errors and the change of payload. Moreover, this algorithm requires very short calculation time. Numerical Simulation of a three-link manipulator is presented to show the robustness and applicability.