Trust modelling is a challenging issue due to the dynamic nature of distributed systems and the unreliability of self-interested agents. In this context, the Agent Reputation and Trust (ART) Testbed has been used to compare trust models in two Spanish competitions in 2006 and 2007 and several international competitions. In this paper we describe the model we have presented to the Spanish compet...

In the last two decades various intelligent robotics competitions have become very popular. Arguably the most well-known of these are the robotic soccer competitions. In addition to their value in attracting media and capturing the minds of the general public, these competitions also provide benchmark problems for various robotics and artificial intelligence (AI) technologies. As with any bench...

PURPOSE Taekwondo, as the most popular martial art among Iranian sportsmen, might lead to injury for the athletes of this sport during competitions. We decided to report the incidence rate of injuries sustained by the athletes of this sport during national competitions. METHODS All competitions of Iran national championship taekwondo league in 2006-2007 with 204 athletes were observed prospec...

League competition is investigated using random processes and scaling techniques. In our model, a weak team can upset a strong team with a fixed probability. Teams play an equal number of head-to-head matches and the team with the largest number of wins is declared to be the champion. The total number of games needed for the best team to win the championship with high certainty T grows as the c...

Japan attacked to Pearl Harbour had been happened in December 1941. There some conclusion founded. Regarding Japan, there are five reasons: economic reason, financial expanding living space, securing from political domestic unrest, and win the war speedily. However, is a pragmatical choice of heavily motivated by energy security agenda. Therefore, even they saw probability was low, still commit...

We present a news-based measure of adverse geopolitical events and associated risks. The risk (GPR) index spikes around the two world wars, at beginning Korean War, during Cuban Missile Crisis, after 9/11. Higher foreshadows lower investment employment is with higher disaster probability larger downside consequences GPR are driven by both threat realization events. We complement our aggr...