به نام خدا
Title: Electromagnetic Interference with RFID Readers in Hospitals
Authors: Yue Ying, Dirk Fischer, Uvo Hlscher
Abstract: Radio frequency identification (RFID) applications have become popular in many areas. RFID uses wireless technology to transmit information stored within a RFID-tag to a RFID-reader. Passive RFID-tags are powered through the received signal from the reader. Therefore the reader has to transmit its request with a certain power to bridge the gap between reader and tag. In contrast to bar-code technology this technique allows communication without requiring a line of sight. The RFID-technology is beginning to be introduced in medical environment, e.g. for patient tracking, staff location, inventory management etc. Implementation of this technology in medical environment has to guarantee the patients_ safety. However the electromagnetic field generated by the RFID-readers may interfere with medical devices. This study evaluates the electromagnetic interference of RFID-readers with medical devices, discusses the results with respect to the safety standards and proposes a process to manage the risks associated with RFID-technology in medical environment.
Publish Year: 2009
Published in: IFMBE - Springer
Number of Pages: 4
موضوع: RFID
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به نام خدا
Title: An efficient parallel architecture for ray-tracing
Authors: Alexandre S Nery Nadia Nedjah Felipe M G Franca
Abstract: Real time rendering of three-dimensional scenes in high photorealistic details is a hard task, such as in the ray tracing rendering algorithm. In general, the performance achieved by a sequential software-based implementation of ray tracing is far from satisfactory. However, parallel implementations of ray tracing have been enabling reasonable real time performance, as the algorithm is embarrassingly parallel. Thus, a custom parallel design in hardware is likely to achieve an even higher performance. In this paper, we propose a hardware parallel architecture capable of dealing with the main desirable features of ray tracing, such as shadows and reflection effects, imposing low area cost and a promising rendering performance. Such architecture, called Grid RT, is based on the Uniform Grid acceleration structure and is intended to deliver massive parallelism through parallel ray-triangle intersection tests as well as parallel processing of many rays. A hardware implementation of the proposed architecture is presented, together with some performance results and resources requirements. The rendering is reduced by 80% using a grid configuration of eight processing elements.
Publish Year: 2012
Published in: Analog Integrated Circuits and Signal Processing - Journal of Springer
Number of Pages: 14
موضوع: پردازش موازی
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