Previous research suggests that several individual and cultural level attitudes, cognitions, and societal structures may have evolved to mitigate the pathogen threats posed by intergroup interactions. It has been suggested that these anti-pathogen defenses are at the root of conservative political ideology. Here, we test a hypothesis that political conservatism functions as a pathogen-avoidance...

This paper describes a novel reactive obstacle avoidance approach for mobile robot navigation in unknown and dynamic environment. This approach is developed based on the “situated-activity paradigm” and a “divide and conquer” strategy which steers the robot to move among unknown obstacles and towards a target without collision. The proposed approach entitled the Virtual Semi-Circles (VSC). The ...

Based on a non-linear single track model which describes the dynamics of vehicle, an optimal path planning strategy is developed. Real time optimization is used to generate reference control values to allow leading the vehicle alongside a calculated lane which is optimal for different objectives such as energy consumption, run time, safety or comfort characteristics. Strict mathematic formulati...

Communicative competence and awareness of communicative strategies are vital factors in EFL learning. Due to their importance, this study aimed investigate the used by teachers learners. To end, 10 were randomly selected. One hundred fifty learners attending these classes also subjected study. The utterances produced participants recorded, transcribed, coded based on Dornyei’s taxonomy (1995). ...

This research proposed an intelligent obstacle avoidance algorithm to navigate an autonomous mobile robot. The presented Intelligent Bug Algorithm (IBA) over performs and reaches the goal in relatively less time as compared to existing Bug algorithms. The improved algorithm offers a goal oriented strategy by following smooth and short trajectory. This has been achieved by continuously consideri...

In this paper, a path planning of humanoid robot for obstacle avoidance by using infrared sensors (IRs) is proposed. An autonomous humanoid robot TWNHR-3 is used to implement the proposed strategy. Four IR sensors are mounted on TWNHR-3 to detect obstacles. Based on the obtained information from IR sensors, a decision tree method is proposed to decide the behavior of robot so that the robot avo...

Copyright q 2012 Zhou Chao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We designed a distributed collision-free formation flight control law in the framework of nonlinear model predictive control. Formation configuratio...

We present some results about the structure of c.e. and ∆2 LR-degrees. First we give a technique for lower cone avoidance in the c.e. and ∆2 LR-degrees, and combine this with upper cone avoidance via Sacks restraints to construct a c.e. LR-degree which is incomparable with a given intermediate ∆2 LR-degree. Next we combine measure-guessing with an LR-incompleteness strategy to construct an inco...

This paper deals with the navigation of a multirobot system (MRS). The latter must reach and maintain a specific formation in dynamic environment. In such areas, the collision avoidance between the robots themselves and with other obstacles (static and dynamic) is a challenging issue. To deal with it, a reactive and a distributed control architecture is proposed. The navigation in formation of ...