Zobrazeno 1 - 10
of 413
pro vyhledávání: '"S. Egashira"'
Publikováno v:
Proceedings of the International Association of Hydrological Sciences, Vol 386, Pp 1-6 (2024)
Mahaweli is the main river in Sri Lanka and it has many main multipurpose reservoirs, especially to cater power and irrigation requirement of the country. Reservoir capacity loss which is the major problems causing to the effectiveness of the major r
Externí odkaz:
https://doaj.org/article/98d455ca88d144d0935d6d1d57fc62ec
Publikováno v:
Proceedings of the International Association of Hydrological Sciences, Vol 386, Pp 109-114 (2024)
The Sangu River, whose basin area is about 3600 km2, conveys a huge volume of sediment laden water during the monsoon, which decreases the river's capacity, causing flooding, channel change, and navigability problems. In this study, a basin-scale rai
Externí odkaz:
https://doaj.org/article/fb4df6a0fb0d40a4ad2cf0a640293da6
Autor:
D. Harada, S. Egashira
Publikováno v:
Proceedings of the International Association of Hydrological Sciences, Vol 386, Pp 159-164 (2024)
As flood disasters with sediment and driftwood are becoming severe, it is required to evaluate the risk of such disasters. The present study proposes methods to create hazard maps for such type of flood disasters using a watershed model and a 2-D flo
Externí odkaz:
https://doaj.org/article/f9bf50b1a9024422b65ce766bdee7671
Publikováno v:
Proceedings of the International Association of Hydrological Sciences, Vol 386, Pp 229-235 (2024)
Conventionally, fine sediment transport is evaluated in terms of advection-diffusion equation of suspended sediment in which the erosion rate of sediment from the bedload layer plays a significant role. The present study aims to evaluate the riverbed
Externí odkaz:
https://doaj.org/article/d0ee2680fc214520b101f57e5cc17427
Autor:
D. Harada, S. Egashira
Publikováno v:
Earth Surface Dynamics, Vol 11, Pp 1183-1197 (2023)
Recent flood hazards occurring in mountainous areas are often characterized by numerous amounts of sediment and large wood supplied from upstream, which often exacerbate flood disasters in downstream areas. This paper proposes a method for describing
Externí odkaz:
https://doaj.org/article/6d8738e2f7244a7fa42b8865b3351310
Autor:
K. Sakai, T. Moritaka, T. Morita, K. Tomita, T. Minami, T. Nishimoto, S. Egashira, M. Ota, Y. Sakawa, N. Ozaki, R. Kodama, T. Kojima, T. Takezaki, R. Yamazaki, S. J. Tanaka, K. Aihara, M. Koenig, B. Albertazzi, P. Mabey, N. Woolsey, S. Matsukiyo, H. Takabe, M. Hoshino, Y. Kuramitsu
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract Magnetic reconnection is a universal process in space, astrophysical, and laboratory plasmas. It alters magnetic field topology and results in energy release to the plasma. Here we report the experimental results of a pure electron outflow i
Externí odkaz:
https://doaj.org/article/edd0671235714202a74dc6e252f327d3
Autor:
Y. Kuramitsu, T. Minami, T. Hihara, K. Sakai, T. Nishimoto, S. Isayama, Y. T. Liao, K. T. Wu, W. Y. Woon, S. H. Chen, Y. L. Liu, S. M. He, C. Y. Su, M. Ota, S. Egashira, A. Morace, Y. Sakawa, Y. Abe, H. Habara, R. Kodama, L. N. K. Döhl, N. Woolsey, M. Koenig, H. S. Kumar, N. Ohnishi, M. Kanasaki, T. Asai, T. Yamauchi, K. Oda, Ko. Kondo, H. Kiriyama, Y. Fukuda
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract Graphene is known as an atomically thin, transparent, highly electrically and thermally conductive, light-weight, and the strongest 2D material. We investigate disruptive application of graphene as a target of laser-driven ion acceleration.
Externí odkaz:
https://doaj.org/article/3fb205b645a544719a2816c4afe13c2c
Autor:
K. Sakai, T. Moritaka, T. Morita, K. Tomita, T. Minami, T. Nishimoto, S. Egashira, M. Ota, Y. Sakawa, N. Ozaki, R. Kodama, T. Kojima, T. Takezaki, R. Yamazaki, S. J. Tanaka, K. Aihara, M. Koenig, B. Albertazzi, P. Mabey, N. Woolsey, S. Matsukiyo, H. Takabe, M. Hoshino, Y. Kuramitsu
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-1 (2022)
Externí odkaz:
https://doaj.org/article/a7740ce699114d1e90f0013b11f1dad0
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 4, Iss 3, Pp 469-474 (2004)
The present study describes entrainment characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influences of bed sediment size on erosion rate by supplying
Externí odkaz:
https://doaj.org/article/76fcf100fef74bd69be31ddabe73cf8b
Autor:
T. Morita, T. Kojima, S. Matsuo, S. Matsukiyo, S. Isayama, R. Yamazaki, S. J. Tanaka, K. Aihara, Y. Sato, J. Shiota, Y. Pan, K. Tomita, T. Takezaki, Y. Kuramitsu, K. Sakai, S. Egashira, H. Ishihara, O. Kuramoto, Y. Matsumoto, K. Maeda, Y. Sakawa
Publikováno v:
Physical Review E. 106
Magnetic reconnection in laser-produced magnetized plasma is investigated by using optical diagnostics. The magnetic field is generated via Biermann battery effect, and the inversely directed magnetic field lines interact with each other. It is shown