This paper presents a processor group membership protocol designed to run on top of a local area network. The protocol maintains information about a selected group of stations that explicitly join the protocol by keeping a replica of a global membership table at every member. Additionally, the protocol guarantees that a given station always occupies the same entry in the table. As a result, tab...

An important consideration for Autonomous Underwater Vehicles in shallow water is station keeping. Station keeping is the ability of the vehicle to maintain position and orientation with regard to a reference object. In shallow water AUV operations, where large hydrodynamic forces are developed due to waves, knowledge of the sea is critical to allow for the design of a control system that will ...

In this paper, we present a strategy to evolve neurocontrollers in aquatic robots capable of generalized station keeping, that is, maintaining a position in the presence of various water flows. Evolved behaviors exhibit a variety of complex fin/flipper movements that enable the robot to react and move against changing flows. Moreover, results indicate that some sensor modalities are beneficial ...

Accessing the World Wide Web with the wireless devices has been the promising technology for the past few years. Interruption in World Wide Web access during handover in a cellular network can be avoided by relocating in advance the proxy cache to the target base station before the handover using the path prediction algorithm. To reduce the cache overhead in the handover, this paper proposes a ...

During recent years there has been growing interest in unmanned aerial vehicles (UAVs). Moreover, the necessity to control and navigate these vehicles has attracted much attention from researchers in this field. This is mostly due to the fact that the interactions between turbulent airflows apply complex aerodynamic forces to the system. Since the dynamics of a quadrotor are non-linear and the ...