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Wireless Sensor Networks (WSNs) which utilise IEEE 802.15.4 technology offer the potential for low cost deployment and maintenance compared with conventional wired sensor networks, enabling effective and efficient condition monitoring of aged civil engineering infrastructure. We will address wireless propagation for a below to above ground scenario where one of the wireless nodes is located in a below...
In comparison with a wired sensor network, a Wireless Sensor Network (WSN) has the potential for easy deployment and increased flexibility and so enabling efficient and low cost condition monitoring of aged civil engineering infrastructure. We will address two wireless communication scenarios, firstly between wireless nodes within a tunnel and secondly for a below to above ground situation where one...
This study presents numerical SAR evaluation in pregnant woman models exposed to magnetic resonance imaging (MRI) radio frequency (RF) coil at 64 MHz. Nine pregnant woman models, representing different stage of pregnancy, are used for this study. SAR values in and around fetuses at different pregnancy stages are calculated. The investigations show an SAR increase beginning at the fifth month of pregnancy...
Ground penetrating radar (GPR) waves in inhomogeneous medium are analyzed by numerical methods in this paper. The theory analysis provides physical interpretation of a calculation model for characteristics of subsurface layers. In this model, the thickness and permittivity of subsurface layers would be estimated by traveling time of reflection wave in GPR measurement. A 3-D finite-difference time-domain...
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