Earticle

In this paper, we address the performance analysis of mid-range wireless power transfer (WPT) system which operates with 13.56 HMz resonant frequency. Moreover, we present the design criteria of the WPT system based on the coupled mode theory (CMT). Specifically, we consider the small size coil antenna in order to apply the WPT system to small devices such as a cell phone in a practical point of view. The our proposed system provides the reliable performance for WPT in a mid-range distance.

The brand-new small output radio equipment which is over than 800MHz has an all-in-one interior antenna. We suggested new measuring method and developed related equipment because all-in-one radio equipment's performance evaluation requests old way, which is measuring transmitter output and antenna capacity separately, to be changed. That is, origin of small radio equipments with the 360 degree field measured by measuring the TRP, and also 360 degree opposite reception level measured at the radio equipment by measuring the TIS to make a quantitative evaluation was to be. Furthermore, we made managing frequencies, all-in-one radio equipment's best design and capacity management efficiently by measuring the gain of an antenna mounted on a PCB, the circuit around the genetic material, conductive material on the effects of radiation or the reception level.

The coupling properties of supermodes guided by grating-assisted directional couplers (GADCs) can be phrased in rigorous modal theory. Such a modal solution for TE modes expressed by simple electrical transmission-line networks is utilized to analyze the power distribution of GADCs with three guiding channels. In particular, the modal transmission-line theory can serve as a template for computational algorithms that systematically evaluate the coupling efficiency that are not readily obtained by other methods.

3D-Video systems allow a user to perceive depth in the viewed scene and to display the scene from arbitrary view-points interactively and on-demand. This paper presents a prototype implementation of a 3D-video streaming system using an IP network. The architecture of our streaming system is layered, where each information layer conveys a single coded video signal or coded scene-description data. We demonstrate the benefits of a layered architecture with two examples: (a) stereoscopic video streaming, (b) monoscopic video streaming with remote multiple-perspective rendering. Our implementation experiments confirm that prototyping 3D-video streaming systems is possible with today's software and hardware. Furthermore, our current operational prototype demon-strates that highly heterogeneous clients can coexist in the system, ranging from auto-stereoscopic 3D displays to resource-constrained mobile devices.

This paper suggests an effective channel choice algorithm for 2nd users in Cognitive Radio Sensor Network. The suggested algorithm is based on learning automata and fuzzy logic. Learning automata shows the result of radio transmission channel learning of 2nd user in channel selection probability value, and fuzzy logic allows consideration of various input variables for final channel selection. Therefore, fuzzy logic considers channel selection probability value that resulted from automata; channel SNR between former user and 2nd user; SNR value among transmitter/receiver 2nd users, and then allows optimum transmission channel selection from multiple available channels. Through the simulation result, it is shown that the suggested algorithm provides higher throughput than existing algorithms.