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- Teruhisa Komatsu, Shuichiro Inagaki, Naoko Nakagawa, Satoshi Nasuno
- Physical review letters
- 2001

We investigate experimentally granular piles exhibiting steady surface flow. Below the surface flow, it has been believed that a "frozen" bulk region exists, but our results show no such frozen bulk. We report here that even the particles in layers deep in the bulk exhibit very slow flow and that such motion can be detected at an arbitrary depth. The mean… (More)

- Zi-Min Hu, Shinya Uwai, Shen-Hui Yu, Teruhisa Komatsu, Tetsuro Ajisaka, Delin Duan
- Molecular ecology
- 2011

Pleistocene glacial oscillations and associated tectonic processes are believed to have influenced the historical abundances and distribution of organisms in the Asia Northwest Pacific (ANP). Accumulating evidence indicates that factors shaping tempospatial population dynamics and distribution patterns of marine taxa vary with biogeographical latitude,… (More)

- Teruhisa Komatsu, Daisuke Matsunaga, +10 authors T. Sugimoto
- Journal of Applied Phycology
- 2007

Drifting seaweeds play important ecological roles in offshore waters. Recently, large amounts of drifting seaweed rafts were found in the eastern East China Sea between the continental shelf and the oceanic front of the Kuroshio Current. However, so far there have been no quantitative reports about this particular area. Two research cruises were organized… (More)

- Teruhisa Komatsu, Naoko Nakagawa
- Physical review letters
- 2008

We study the nonequilibrium steady state realized in a general stochastic system attached to multiple heat baths. Starting from the detailed fluctuation theorem, we derive concise and suggestive expressions for the corresponding stationary distribution which are correct up to the second order in thermodynamic forces. The probability of a microstate eta is… (More)

We study traffic congestion by analyzing a one dimensional traffic flow model. Developing an asymptotic method to investigate the long time behavior near a critical point, we derive the modified Korteweg-de Vries (mKdV) equation as the lowest order model. There are an infinite number of kink solitons to the mKdV equation, while it has been found by… (More)

- Teruhisa Komatsu, Masahiro Fukuda, +4 authors Michio Kawamiya
- Marine pollution bulletin
- 2014

Global warming effects on seaweed beds are already perceptible. Their geographical distributions greatly depend on water temperatures. To predict future geographical distributions of brown alga, Sargassum horneri, forming large beds in the northwestern Pacific, we referred to future monthly surface water temperatures at about 1.1° of longitude and 0.6° of… (More)

Recently a novel concise representation of the probability distribution of heat conducting nonequilibrium steady states was derived. The representation is valid to the second order in the “degree of nonequilibrium”, and has a very suggestive form where the effective Hamiltonian is determined by the excess entropy production. Here we extend the… (More)

- Teruhisa Komatsu, Shizuha Mizuno, +8 authors Tetsuro Ajisaka
- Journal of Applied Phycology
- 2013

Floating seaweeds play important ecological roles in offshore waters. Recently, large amounts of rafting seaweed have been observed in the East China Sea. In early spring, juveniles of commercially important fish such as yellowtail accompany these seaweed rafts. Because the spatial distributions of seaweed rafts in the spring are poorly understood, research… (More)

- Teruhisa Komatsu, Naoko Nakagawa, Shin-ichi Sasa, Hal Tasaki
- Physical review letters
- 2008

Starting from microscopic mechanics, we derive thermodynamic relations for heat conducting nonequilibrium steady states. The extended Clausius relation enables one to experimentally determine nonequilibrium entropy to the second order in the heat current. The associated Shannon-like microscopic expression of the entropy is suggestive. When the heat current… (More)

- Teruhisa Komatsu, Naoko Nakagawa
- Physical review. E, Statistical, nonlinear, and…
- 2006

We study a class of heat engines including Feynman's ratchet, which exhibits a directed motion of a particle in nonequilibrium steady states maintained by two heat baths. We measure heat transfer from each heat bath separately, and average them using a careful procedure that reveals the nature of the heat transfer associated with directed steps of the… (More)