Researcher Database

Kohei Hasegawa
Faculty of Fisheries Sciences Marine Bioresource and Environmental Science Marine Environment and Resource Sensing
Assistant Professor

Researcher Profile and Settings

Affiliation

  • Faculty of Fisheries Sciences Marine Bioresource and Environmental Science Marine Environment and Resource Sensing

Job Title

  • Assistant Professor

J-Global ID

Research Areas

  • Natural sciences / Atmospheric and hydrospheric science

Research Activities

Published Papers

  • K. Uchida, H. Ogawa, K. Hasegawa, Y. Miyamoto, H. Noro, Y. Wada, S. Akiyama
    Nippon Suisan Gakkaishi 84 (1) 14 - 22 2018/01 [Refereed][Not invited]
  • K. Hasegawa, K. Uchida, Y. Miyamoto
    The Journal of the Marine Acoustics Society of Japan 44 (1) 1 - 12 2017/01 [Refereed][Not invited]
  • Y. Miyamoto, K. Uchida, K. Amakasu, K. Hasegawa, Y. Theparoonart, M. Anongponyoskun, S. Ishikawa, Y. Minlee, T. Sasakura
    The Journal of the Marine Acoustics Society of Japan 43 (2) 71 - 78 2016/04 [Refereed][Not invited]
  • Kohei Hasegawa, Yoshinori Miyamoto, Keiichi Uchida
    FISHERIES SCIENCE 82 (2) 213 - 223 0919-9268 2016/03 [Refereed][Not invited]
     
    A system for real-time monitoring the depth of small fishing gear was developed using acoustic telemetry to improve the efficiency of fishing operations. The system consisted of an acoustic transmitter (pinger), an omni-directional hydrophone with a depressor, and a receiver. Using a pinger equipped with a depth sensor, a fisherman can confirm whether the fishing gear is at the intended depth. The battery of the developed pinger can be replaced easily for repeated use. The performance of the system was evaluated in a field experiment. The accuracy of measured depth was 0.4 m and was constant even if the pinger was moving. In the experiment, the system could successfully monitor the pinger depth every several second. The system was implemented in hairtail trolling to examine its effectiveness. The implementation experiments revealed some issues with the system, such as the effect of signal reflections or the installation method of the hydrophone. However, the system could monitor the depth of the fishing gear continuously in real time and it operated successfully without any problem during the fishing operation. Application of the developed system is expected to aid fishermen in adjusting the gear depth easily and accurately.
  • K. Hasegawa, Y. Miyamoto, K. Uchida, T. Kakihara
    The Journal of the Marine Acoustics Society of Japan 39 (4) 163 - 172 2012/10 [Refereed][Not invited]

Books etc

  • Guide to operation of acoustic data collection system (AQFI-1301) for shallow waters
    Y. Miyamoto, K. Uchida, Y. Theparoonrat, M. Anongponyoskun, K. Thongsila, Y. Minlee, T. Sasakura, K. Hasegawa (Joint work)
    Research Institute for Humanity and Nature 2017/02 (ISBN: 9784906888351)

Conference Activities & Talks

  • 不規則配列を適用した送受波器のビーム特性シミュレーション  [Not invited]
    長谷川 浩平
    海洋音響学会2017年度研究発表会  2017/05

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