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Small implantable devices have been investigated with great interest for wireless medical applications because of the promise of different clinical usages in order to promote patient's independence. In these implanted device systems, the antenna plays an important role as a part of transmitting and receiving power. Therefore, the research on the antennas for implantable devices (implantable antennas)...
Magnetic resonance imaging (MRI) is a noninvasive imaging techniques used to visualize the inside of the human body based on nuclear magnetic resonance. Currently, RF coils that transmit high frequency and high power of electromagnetic (EM) wave pulses are being investigated to obtain high-quality images and to shorten the imaging time. Due to these approaches, the specific absorption rate (SAR) rise...
The numerical dosimetry of women during pregnancy is an important issue in electromagnetic field safety. We had developed a whole-body numerical pregnant-woman model at 26-weeks' gestation. In this study, we developed pregnant-woman models that included the inherent tissues of pregnant women adjusted to the standard reference values at 12- and 20-weeks' gestation by deforming the existing pregnant-woman...
Autonomy of peer-to-peer (P2P) systems requires some form of economies. Forwardable storage claims of Samsara can define a common value in computer networks, and possibly be a "commodity money" in P2P systems. However, without managing how far the claims can be forwarded, they would not form an efficient, dependable and sustainable economic chain. We propose to use i-WAT tickets to represent...
In this paper, the SAR distribution in the fetus was calculated using the numerical model of the pregnant woman by the NHA with the metallic case at 150 MHz. As a result, it has confirmed that the SAR of the NHA at 150 MHz in deep region of the maternal body (y ges 80 mm) is higher than that of the half-wave dipole antenna at 2 GHz. In addition, it has confirmed that the fetus averaged SAR is 38%...
In this paper, a cavity-backed slot antenna for on-body BAN devices has been investigated. The electric field distributions inside and around the human body are numerically analyzed by the use of the FDTD method. According to the results, in the region on and near the human body, the dominant component of electric field is vertical to the body surface, and the propagation mode is assumed to be creeping...
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