RFID is core technology in the area of ubiquitous computing.To identify the objects begins with the reader query to the tag attached to the subject. When multiple tags exist in the reader’s interrogation zone, these tags simultaneously respond to the reader’s query, resulting in collision. This kind collision makes the reader to take long time to identify tags within the reader’s identification...

The collision of a probe laser pulse with a relativistic ionization front is analyzed via two-dimensional ray-tracing theory and simulations. It is shown that collisions in higher dimensions lead to new regimes for the frequency upshift of the probe photons; the frequency upshift can be considerably higher for particular collision angles that maximize the interaction length with the ionization ...

—In the user deployed femtocell networks, the frequency collision dramatically decreases the throughput of femtocell networks. In this paper, we propose a frequency collision elimination method based on negotiation and noncooperative game to avoid frequency collisions between neighboring femtocells. The frequency collisions inside a cluster are figured out by using the negotiation mechanism. T...

We numerically study the breathing dynamics induced by collision between bright solitons in one-dimensional Bose-Einstein condensates with strong dipole-dipole interaction. This phenomenon is closely related to after-collision short-lived attraction of dipolar effect. The initial phase difference leads asymmetric after collision, which manifested on their different amplitude, frequency, and ato...