In this paper, a coordination strategy for determining collision free path of end effectors of two manipulators involved in coordinated manipulation is proposed. This strategy consists of collision checking and path planning modules. Collision checking is done by modeling the links and environment of manipulator using sphere swept volume technique and utilizing minimum distance heuristic for in...

The paper presents an obstacle detection method for mobile robots using a structured background. This method is based on differences of appearance between obstacles and the background in the camera images. The basic idea is to cover the ground of the workspace with a known structure. If part of this structure is obscured, this can be detected and indicates the existence of an obstacle. The meth...

When computing the trajectory of an autonomous vehicle, inevitable collision states must be avoided at all costs, so no harm comes to the device or pedestrians around it. In dynamic environments, considering collisions as binary events is risky and inefficient, as the future position of moving obstacles is unknown. We introduce a time-dependent probabilistic collision state checker system, whic...

1024x768 normal 0 false false false en-us x-none ar-sa introduction: the main purpose of this project was exactly identification of the applied researches done by different offices of the iranian ministry of health, remedies and medical education in the deputy between september of 1998 to september of 2003, considering their results and the degree of utilization by the users . methods: this pro...

Today, e-commerce has become a top priority for organizations. By getting use of the Internet, organizations can significantly influence the attitudes of their customers and encourage them to benefit from the services provided by them. Consequently, organizations can affordably become a leader in the market, supply, delivery, and service. Furthermore, development of e-commerce in all existing...

In this paper we prove optimal interior regularity for solutions to the obstacle problem for a class of second order differential operators of Kolmogorov type. We treat smooth obstacles as well as non-smooth obstacles. All our proofs follow the same line of thought and are based on blow-ups, compactness, barriers and arguments by contradiction. The problem considered arises in financial mathema...

The use of simulations has become increasingly frequent in the study and the performance evaluation of network systems. The simulation environment deeply influences the behaviour of results, so a model that simulates a realistic movement of the nodes is necessary for the study of wireless networks. Simple mobility models do not provide realistic scenarios. Often movements are completely random,...