Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Katsuyoshi Kawaguchi"'
Publikováno v:
Marine Technology Society Journal. 54:84-90
A remotely operated vehicle (ROV) can install submarine cables along a planned route accurately, thereby deploying cabled seafloor observatories at the intended locations. In this study, we developed an ROV-based cable-laying system. Its manual and a
Publikováno v:
IEEE Journal of Oceanic Engineering. 43:665-676
We developed an automated cable-laying system operated through a remotely operated vehicle (ROV). This system can automatically install a thin optical-fiber submarine cable at a rate that matches the ground speed of the ROV and adjust the amount of c
Autor:
Katsuyoshi Kawaguchi, Shuhei Nishida, Takashi Yokobiki, Takeshi Ohki, Eiichiro Araki, Kenichiro Tani
Publikováno v:
Marine Technology Society Journal. 52:138-149
As part of a recent Japanese governmental project, the government has planned and begun a program to develop a seafloor cabled observatory that facilitates the long-term monitoring of hydrothermal vents and the ecological changes surrounding them. Be
Publikováno v:
Marine Technology Society Journal. 52:109-119
The dense ocean floor network system for detecting earthquakes and tsunamis, DONET, began its operations in the Nankai Trough, southwest Japan, in 2010. The present study focuses on the pressure sensors used in DONET observatories to measure hydrauli
Autor:
Tohru Kodera, Takashi Yokobiki, Shuhei Nishida, Takeshi Ohki, Kenichiro Tani, Katsuyoshi Kawaguchi, Takafumi Kasaya, Masayuki Toizumi
Publikováno v:
JAMSTEC Report of Research and Development. 26:21-35
Publikováno v:
The Journal of the Marine Acoustics Society of Japan. 44:13-22
Publikováno v:
2019 IEEE Underwater Technology (UT).
We used ambient noise records observed by DONET seafloor seismometer and LTBMS borehole seismometers to monitor seismic velocity structure along the Nankai Trough subduction zone. Seismic interferometry, which can produce zero offset pseudo shot reco
Publikováno v:
2019 IEEE Underwater Technology (UT).
We have developed a mobile pressure gauge for calibrating the underwater pressure sensors on a centimeter scale. A concept of the pressure gauge is to carry a reference pressure from laboratory to the underwater pressure sensors, and is designed to c
Publikováno v:
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO).
We used ambient noise records observed by DONET seafloor seismometer to detect temporal change of seismic velocity structure along the Nankai Trough subduction zone. Seismic interferometry, which can produce zero offset pseudo shot records by calcula
Autor:
Tetsuya Miwa, Hiroyuki Yamamoto, Katsuyoshi Kawaguchi, Yasuo Furushima, Jin-Kyu Choi, Tatsuhiro Fukuba
Publikováno v:
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO).
Environmental impact assessment on the site of ocean resource exploration and exploitation is required to be conducted under regulatory guidelines to protect and preserve ecosystems and biodiversity. Thus, observatories that can achieve long-term mon