| Presentation | 2003/11/28 Statistical Evaluation of Dosimetry in Realistic Head Models of Adult and Children for Portable Telephones Kayoko MIYAMOTO, Jianqing WANG, Osamu FUJIWARA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Biological hazards due to radio-frequency (RF) waves result mainly from the temperature rise in tissue. It should be, therefore, clarified to what extent the RF waves of portable telephones increase the temperature-rise in human brain that includes the central part governing the body-temperature regulation function, hi this paper, we calculated both the specific absorption rate (SAR) and the resultant temperature-rise for 900 MHz and 2 GHz portable telephones using the finite-difference time-domain (FDTD) method for three typical use positions, i.e., the vertical position, cheek position and tilt position. As a result, we found that there was an increase for median and 1% value of the cumulative distribution of temperature-rise in children's brains for any use positions of the portable telephones compared to that in the adult's brain, and also that the increasing trend in children's brains for temperature-rise is identical to the temperature-rise trend in children's hypothalamus. In addition, we found that the ten-gram averaged peak SAR among the adult and children heads had the same trend as that of the 0.1% value of the relatively cumulative distribution of temperature-rise, which shows that the ten-gram averaged peak SAR reflects only the localized temperature-rise in the brain surface. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Portable Telephones / dosimetry / temperature rise / SAR / children / FDTD |
| Paper # | EMCJ2003-113 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2003/11/28(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Statistical Evaluation of Dosimetry in Realistic Head Models of Adult and Children for Portable Telephones |
| Sub Title (in English) | |
| Keyword(1) | Portable Telephones |
| Keyword(2) | dosimetry |
| Keyword(3) | temperature rise |
| Keyword(4) | SAR |
| Keyword(5) | children |
| Keyword(6) | FDTD |
| 1st Author's Name | Kayoko MIYAMOTO |
| 1st Author's Affiliation | Faculty of Engineering, Nagoya Institute of Technology() |
| 2nd Author's Name | Jianqing WANG |
| 2nd Author's Affiliation | Faculty of Engineering, Nagoya Institute of Technology |
| 3rd Author's Name | Osamu FUJIWARA |
| 3rd Author's Affiliation | Faculty of Engineering, Nagoya Institute of Technology |
| Date | 2003/11/28 |
| Paper # | EMCJ2003-113 |
| Volume (vol) | vol.103 |
| Number (no) | 488 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |