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Journal Articles

Critical slowing-down and field-dependent paramagnetic fluctuations in the skyrmion host EuPtSi; $$mu$$SR and NMR studies

Higa, Nonoka*; Ito, Takashi; Yogi, Mamoru*; Hattori, Taisuke; Sakai, Hironori; Kambe, Shinsaku; Guguchia, Z.*; Higemoto, Wataru; Nakashima, Miho*; Homma, Yoshiya*; et al.

Physical Review B, 104(4), p.045145_1 - 045145_7, 2021/07

 Times Cited Count:0 Percentile:0(Materials Science, Multidisciplinary)

Journal Articles

The Dynamic response of Horonobe Underground Research Center during the 2018 June 20 earthquake

Sato, Toshinori; Aoyagi, Kazuhei; Miyara, Nobukatsu; Aydan, $"O$mer*; Tomiyama, Jun*; Morita, Tatsuri*

Proceedings of 2019 Rock Dynamics Summit in Okinawa (USB Flash Drive), p.640 - 645, 2019/05

An earthquake with a moment magnitude of 4 occurred in June 20, 2018, which is also named as the 2018 June 20 Soya Region earth-quake. The strong motions induced by this earthquake were recorded by the accelerometers installed in the Horonobe URL as well as the Kik-Net and K-Net strong motions networks operated by the National Research Institute for Earth Science and Disaster Prevention of Japan. The authors explain the results of the analyses carried out on the ground amplification and frequency characteristics of the acceleration records at the Horonobe URL and those of the Kik-net strong motion station and the structural effect of the URL on the ground amplification and frequency characteristics. Furthermore, the authors discuss the implications of the results obtained from this study in practice and the safety of the nuclear waste disposal at depth.

Journal Articles

Fermi surface properties of semimetals YSb, LuSb, YBi, and LuBi studied by the de Haas-van Alphen effect

Kakihana, Masashi*; Nishimura, Kengo*; Takeuchi, Tetsuya*; Haga, Yoshinori; Harima, Hisatomo*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

Journal of the Physical Society of Japan, 88(4), p.044712_1 - 044712_11, 2019/04

 Times Cited Count:3 Percentile:37.12(Physics, Multidisciplinary)

Journal Articles

Rock mass property evaluation based on the borehole wall images taken by using an ultrasonic scanner (USS)

Otsuka, Yasunori*; Ishikawa, Takanori*; Tajima, Katsuhiro*; Wada, Tetsu*; Aydan, $"O$mer*; Tokashiki, Naohiko*; Sato, Toshinori; Aoyagi, Kazuhei

Journal of Nepal Geological Society, 55(Special Issue), p.1 - 6, 2018/00

Ultrasonic wave reflection intensity of the wall of borehole drilled from bottom of the East Access Shaft in the Horonobe Underground Research Laboratory, Hokkaido, Japan, was obtained using an ultrasonic scanner (USS). In this paper, we compared results of USS observation with core logging data including core observation, optical digital scanner (ODS) observation, and result of Needle Penetration Index (NPI) tests. The results indicated that ultrasonic wave reflection intensity had a good correlation with other observation results. USS observation and NPI tests are useful techniques for determination of detailed rock mass classification.

Oral presentation

Relaxation phenomena in superionic and molten cuprous iodide

Kawakita, Yukinobu; Tahara, Shuta*; Nakamura, Mitsutaka; Kikuchi, Tatsuya; Inamura, Yasuhiro; Maruyama, Kenji*; Nakajima, Kenji; Kawamura, Seiko; Yamauchi, Yasuhiro; Kambara, Wataru; et al.

no journal, , 

no abstracts in English

Oral presentation

Study of browsing functions for underwater environmental information observation in underwater monitoring sensor network system

Ozeki, Ryutaro*; Sekino, Kodai*; Suzuki, Tsuyoshi*; Sawai, Kei*; Takemura, Fumiaki*; Kawabata, Kuniaki; Yamashiro, Hideyuki*

no journal, , 

This paper proposed the browsing system and functions for underwater environmental data gathered by wireless sensor network. The discussions were done for the design approaches and implementation examples with gathered data.

Oral presentation

Static and dynamic structures of superionic melts of noble-metal salts

Kawakita, Yukinobu; Tahara, Shuta*

no journal, , 

Oral presentation

Study of wireless sensor node functions with attached algae removal ability for under-water monitoring sensor network

Ikeda, Kohei*; Suzuki, Tsuyoshi*; Yamashiro, Hideyuki*; Takemura, Fumiaki*; Kawabata, Kuniaki

no journal, , 

We develop a wiper device for underwater monitoring sensor nodes. Coral images are gathered by the sensor nodes, but a camera view of the sensor node is interfered by attached algae. Therefore, attached algae are removed by the wiper device. In this paper, we conducted an experiment to confirm the wiper function in the long term operation.

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