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Online ISSN : 1884-5827
Print ISSN : 1341-9455
ISSN-L : 1341-9455
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選択された号の論文の4件中1~4を表示しています
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研究論文
  • ~高層建築物からの全館避難を円滑化するリアルタイム技術の可能性~
    朴 聖經, 水野 雅之, 藤井 皓介, 門倉 博之, 佐野 友紀, 田中 俊成, 関澤 愛
    2020 年 32 巻 4 号 p. 118-125
    発行日: 2020/12/31
    公開日: 2021/04/29
    ジャーナル フリー

    In Japan, a standard on the minimum capacity of escape staircases according to occupant load is not regulated except for some building uses. Therefore, staircases can't contain all occupants in an emergency case. Even though they attempt to evacuate building, most of them must wait in staircases and/or corridors for a long time, which must cause heavy congestion. Thereby, the phased-evacuation method has been recommended for preventing it, but there is no specific method or standard related to the strategic plan. In order to improve a sequential evacuation plan, evacuation drills were conducted at a high-rise office building in Tokyo, and year by year the scenarios of evacuation guidance were advanced a lot better. However, having several unexpected reasons or behaviors; not following broadcasting order, walking slow for chatting and having disability, some drills hadn't been carried out as predicted. The purpose of this study is to consider the real-time control method of changing the scenario for providing guidance flexibly in a sequential evacuation using security device such as attendance management system and security cameras in the future.

研究速報
  • -生体組織との寄生的結合を考慮した回路解析の提案-
    髙橋 俊介, 柴 建次
    2020 年 32 巻 4 号 p. 126-130
    発行日: 2020/12/31
    公開日: 2021/04/29
    ジャーナル フリー

    Usage of the air-core transcutaneous energy transmission system (TETS) is a method that shows potential with respect to the supply of energy to ventricular assist devices. The TETS is composed of two coils of the transformer with spirally wound conductive wires; the external coil is fitted outside the body and the internal coil is embedded in the subcutaneous tissue of a patient. Here, it should be noted that patient leakage current (PLC) from the TETS can flow between the external and internal coils into the ground because of the capacitive coupling of the coils and human tissue. In this study, we analyzed the PLC of a TETS using a circuit simulator and designed a circuit model of a TETS with considering the equivalent circuit of biological tissue using circuit analysis tools. The respective circuit parameters were used as the measurement value of LCR meter at the transmitting frequency of 207 kHz, the PLC was analyzed using transmitting powers of 10-30 W. The results showed that the simulated value of the PLC was 9.37 µA, and the measured value was 8.86 ±0.08 µA at 15 W of output power. These results are seen to be in good agreement.

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