In view of a dynamic obstacle environment with motion uncertainty, we present a dynamic collision avoidance method based on the collision risk assessment and improved velocity obstacle method. First, through the fusion optimization of forward-looking sonar data, the redundancy of the data is reduced and the position, size and velocity information of the obstacles are obtained, which can provide...

Radio Frequency Identification (RFID) is an auto recognition system that consistis of a number of tags and readers. There could be multiple tags a reader should identify. Since a medium is shared by multiple tags, a collision occurs at the reader’s side when two or more tags get transmitted simultaneously. Therefore, anti-collision mechanism that collaborately arbitrates collisions is required....

This paper describes a new tree based anti-collision algorithm for Radio Frequency Identification (RFID) systems. The proposed technique is based on fast parallel binary splitting (FPBS) technique. It follows a new identification path through the binary tree. The main advantage of the proposed protocol is the simple dialog between the reader and tags. It needs only one bit tag response followed...

Submitted for the DFD10 Meeting of The American Physical Society Effect of inter-particle collision in particle-laden homogeneous isotropic turbulence OHJOON KWON, CHANGHOON LEE, Yonsei University — It has been known that Inter-particle collision of small spherical particles in particle laden homogeneous isotropic turbulence modifies the statistical characteristics of particle behaviour. For ex...

The Unmanned Aircraft Systems (UAS) community in the United States has identified the need for a “collision avoidance region” in which UAS Detect-and-Avoid (DAA) vertical guidance is restricted to preclude interoperability issues with manned aircraft collision avoidance system vertical resolution advisories (RAs). This paper documents the process by which the collision avoidance region was defi...

The PHENIX collaboration has developed novel methodologies for reliable extraction of jet functions from two and three particle azimuthal correlation functions measured at mid-rapidity in Au+Au collisions at √ s = 200 GeV. The extracted jet shape and the yield of jet-associated partner hadrons (per trigger hadron) are found to vary with particle type and collision centrality, indicating a signi...

Minimizing broadcast latency is one of the most important issues for broadcasting in duty-cycled wireless sensor networks. The existing broadcast schemes do not allow any collision in a schedule to ensure its completion, i.e. all nodes receive a broadcast message collision-freely. A delay of transmission caused by the collision-prevention may increase the broadcast latency if the delay occurs a...