この研究は、長期観察のためのRFIDタグを植え込むための基礎データとして、若いメスのアシカ（n = 5）の頭皮の誘電特性を周波数範囲0.1-10 GHzで測定した。同様に、ブタ（Sus scrofa：n = 5）およびヒツジ（Ovis aries：n = 5）の頭の付け根部分（タグの埋め込み部位）も測定した。結果として、得られたデータの周波数曲線の形状は、ヒト成人の皮膚データに類似していたが、値は全般的に低値であった；測定した個体間での変動は、すべての種で認められた、と報告している。なお、RFIDタグの回路は、損失の多い媒質または皮膚、さらに誘電特性の変動の結果として起きるアンテナの離調を考慮して設計されると付言している。
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To study the dielectric properties of the cranial skin of non-sexually mature Steller sea lions, and domesticated pigs and sheep over a frequency range of 0.1-10 GHz at the base of their heads where a identification tag will be implanted.
Radiofrequency tags are used to help to determine why Steller sea lions are declining by monitoring the movements and survivorship of the young otariids. Knowing the dielectric properties of young Steller sea lions is important, as they are key parameters in electromagnetic irradiation models used in antenna design.
|ばく露1: 0.1–10 GHz||-|
|Additional information||Reference Article: Popovic D and Okoniewski M 2003 Response characterization of the precision open-ended coaxial probe for dielectric spectroscopy of breast tissue IEEE Antennas and Propagation Society Int. Symp. vol 4 54¿7|
|Distance between measurement device and exposure object||0 mm|
|チャンバの詳細||The porcine subjects were tested within heated laboratories, while the other subjects were tested in unheated research areas adjacent to their cages.|
|ばく露装置の詳細||On each subject, four sites on the back of the head and behind the coronal suture (proposed implant site) were measured. The sites formed a rectangle of size 5 cm Œ 3 cm. These four sites were numbered and kept consistent across different test subjects by placing a cardboard template on the same head position. Time restrictions (due to the anesthetics, 30¿60 min) permitted two repetitions per position in the otariids and three to four in the other subjects.|
No parameters are specified for this exposure.
The resulting curves of all animals were similar in shape to each other and to the curves generated from human skin, but the values were generally lower. The values varied with subject and, in the case of the porcine subject, with age.