Radio Frequency Identification is a technology where data is transmitted via radio waves on the electromagnetic spectrum. An RFID system consists of a radio frequency transceiver which both transmits and receives signals, and a miniature transponder in the form of an RFID “tag” that houses an antenna for receiving signals and a tiny chip containing the RF circuitry and the information to be tra...

The use of acoustic waves in researches related to sea water is of most importance among scientists recently. Since these waves are the only waves, transmitted in water with lowest attenuation and high speed, they can be used in many scientific fields. The main goal of this research is to better understand the physics and mechanisms of sound-seabed interaction, including acoustic penetration, p...

Temporal correlation between atmospheric anomalies and earthquakes has recently been verified statistically through measuring VHF FM radio waves transmitted beyond the line-of-sight. In order to locate the sources of such atmospheric anomalies, we developed a VHF interferometer system (bistatic-radar type) capable of finding the arrival direction of FM radio waves scattered possibly by earthqua...

Conventional three-dimensionally (3D) chiral media can exhibit optical activity for transmitted waves, but optical activity for reflected waves is negligible. This work shows that mirror asymmetry of the experimental arrangement extrinsic 3D chirality leads to giant optical activity for reflected waves with fundamentally different characteristics. It is demonstrated experimentally that extrinsi...

[1] Transmission fluctuations of log-amplitude and phase can be used to construct coherence functions to infer the statistical characteristics of crustal and mantle small-scale heterogeneities. Recent numerical simulations of wave propagation in random media have revealed an apparent discrepancy between simulations and theory for phase coherence functions. In this paper, we show that the report...

the existing theory for wave propagation through a soil layer are not compatible with the real soil layers because in the theory the layers are flat and the sub-layers are parallel, while in real the soil layers are not flat and they may not be parallel. thus, wave propagations through a corrugated interface are so important. in this paper, a two-dimensional sh-wave propagation through a corrug...