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International Journal of Information, Control and Computer Sciences

ISSN: 2517-9942

Total 64 content found

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A Real-Time Tracking System Developed for an Interactive Stage Performance

Year: 2007 Volume: 1 Issue: 5 1194 - 1197 Pages

Abstract: A real-time tracking system was built to track performers on an interactive stage. Using an ordinary, up to date, desktop workstation, the performers- silhouette was segmented from the background and parameterized by calculating the normalized central image moments. In the stage system, the silhouette moments were then sent to a parallel workstation, which used them to generate corresponding 3D virtual geometry and projected the generated graphic back onto the stage.

A Computational Model for Resolving Pronominal Anaphora in Turkish Using Hobbs- Naïve Algorithm

Year: 2007 Volume: 1 Issue: 5 1190 - 1193 Pages

Abstract: In this paper we present a computational model for pronominal anaphora resolution in Turkish. The model is based on Hobbs’ Naїve Algorithm [4, 5, 6], which exploits only the surface syntax of sentences in a given text.

Discontinuous Feedback Linearization of an Electrically Driven Fast Robot Manipulator

Year: 2007 Volume: 1 Issue: 5 1184 - 1189 Pages

Abstract: A multivariable discontinuous feedback linearization approach is proposed to position control of an electrically driven fast robot manipulator. A desired performance is achieved by selecting a useful controller and suitable sampling rate and considering saturation for actuators. There is a high flexibility to apply the proposed control approach on different electrically driven manipulators. The control approach can guarantee the stability and satisfactory tracking performance. A PUMA 560 robot driven by geared permanent magnet dc motors is simulated. The simulation results show a desired performance for control system under technical specifications.

Robot Motion Planning in Dynamic Environments with Moving Obstacles and Target

Year: 2007 Volume: 1 Issue: 5 1178 - 1183 Pages

Abstract: This paper presents a new sensor-based online method for generating collision-free near-optimal paths for mobile robots pursuing a moving target amidst dynamic and static obstacles. At each iteration, first the set of all collision-free directions are calculated using velocity vectors of the robot relative to each obstacle and target, forming the Directive Circle (DC), which is a novel concept. Then, a direction close to the shortest path to the target is selected from feasible directions in DC. The DC prevents the robot from being trapped in deadlocks or local minima. It is assumed that the target's velocity is known, while the speeds of dynamic obstacles, as well as the locations of static obstacles, are to be calculated online. Extensive simulations and experimental results demonstrated the efficiency of the proposed method and its success in coping with complex environments and obstacles.