In RoboCup, although the fields are standardized and color coded, the area outside the fields often contains many objects of various colors. Sometimes objects off the field may look very similar to balls, robots, or other objects normally found on the soccer field. Robots must detect all of these objects, and then differentiate between the true positives and false positives. This paper presents...

We present a complete system for obstacle avoidance for a mobile robot. It was used in the RoboCup 2003 obstacle avoidance challenge in the Sony Four Legged League. The system enables the robot to detect unknown obstacles and reliably avoid them while advancing toward a target. It uses monocular vision data with a limited field of view. Obstacles are detected on a level surface of known color(s...

In multi-robot settings, activity recognition allows a robot to respond intelligently to the other robots in its environment. Conditional random fields are temporal models that are well suited for activity recognition because they can robustly incorporate rich, non-independent features computed from sensory data. In this work, we explore feature selection in conditional random fields for activi...

Constructing soccer robots is an attempt in development of AI researches, done by defining a standard problem and solving it by many researchers all over the world. In this field, every year a formal federation holds international competitions, called RoboCup [1]. The Simulation League is one of the branches of the RoboCup. We have designed and implemented an online coach for a soccer simulatio...

We present a complete system for obstacle avoidance for a mobile robot. It was used in the RoboCup 2003 obstacle avoidance challenge in the Sony Four Legged League. The system enables the robot to detect unknown obstacles and reliably avoid them while advancing toward a target. It uses monocular vision data with a limited field of view. Obstacles are detected on a level surface of known color(s...

Identification of differences in individual conative characteristics and in perceived group cohesion of the basketball players playing in different positions in the team could provide guidelines for a better selection of basketball players and better coaching work. The aim of our study was to determine the differences in relation to the positions of guards and forwards/centres, and the four maj...

The purpose of this research was to evaluate the serum cortisol and immunoglobulin-A (IgA) responses to maximal progressive exercise in elite male and female athletes. Twenty-four elite athletes who had experience in national team or played on league championship voluntarily participated in this study ( ages: 22.46±3.37 yr, height: 175.54±8.68 cm, weight: 70.02±13.60 kg, body fat percent: 15.86...

OBJECTIVE To assess the risk of injury to professional footballers during European international and English Premier and First Division league matches. METHODS Videotaped recordings of 29, 49, and 93 matches from the 1996 European Championship, 1996/1997 English Premier season and 1994 to 1997 English First Division seasons respectively were analysed. During each match, several relevant varia...

In the area of agent systems, as throughout in computer science, formal methods are applied to specify complex systems, to ensure certain properties of a system, or to generally simplify the development of solutions. In traditional symbolic artificial intelligence, logic and planning theories are usually used for modelling autonomous agents. But these approaches turned out to be not applicable ...