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- H. Miyoshi, Masahiro Fukuda, +15 authors Mikio Kishimoto
- SC
- 1994

NAL Numerical Wind Tunnel (NWT) is a distributed memory parallel computer developed through joint research and development of NAL and Fujitsu. It is based on the analysis of CFD codes developed in NAL. The target performance is more than 100 times faster than VP400.In this paper, the parallel computation model employed in the development of the NWT isâ€¦ (More)

Dramatic increases in computing power and network speed, along with advances in sensing technology, have broadened the range of devices that can connect to the Internet. Large quantities of diverse, time-sequenced data are flowing in from the Web and countless sensors, and there is a strong demand to rapidly and efficiently extract any valuable informationâ€¦ (More)

We calculate connected correlators in Gaussian orthogonal, unitary and symplectic random matrix ensembles by the replica method in the 1/N-expansion. We obtain averaged one-point Green's functions up to the next-to-leading order O(1/N) and wide two-level correlators up to the first non-trivial order O(1/N 2) by carefully treating fluctuations inâ€¦ (More)

- Yoshinori Sakamoto, Hisamitsu Mukaida, Chigak Itoi
- Physical review letters
- 2006

The functional renormalization group for the random-field and random-anisotropy O(N) sigma models is studied to 2 loop. The ferromagnetic-disordered (F-D) transition fixed point is found to next order in d = 4 + epsilon for N > N(c) (N(c) = 2.834 740 8 for random field, N(c) = 9.441 21 for random anisotropy). For N < N(c) the lower critical dimension d =â€¦ (More)

- Shin Okada, Yoshinori Sakamoto, Noboru Asai
- Systems and Computers in Japan
- 1996

We calculate connected correlators in time dependent Gaussian orthogonal and symplectic random matrix ensembles by a diagrammatic method. We obtain averaged one-point Green's functions in the leading order O(N 0) and wide two-level and three-level correlators in the first nontrivial order by summing over twisted and untwisted planer diagrams. Introductionâ€¦ (More)

We study the critical phenomena of a random field O(N) spin model near the lower critical dimension, by means of the renormalization group method and the 1/N expansion. We treat the O(N) nonlinear Ïƒ model including a random field and all the random anisotropy terms, and calculate the one-loop beta function for a linear combination of them in d = 4+ 2 underâ€¦ (More)

Abstract. We reconsider stability of the non-trivial fixed point in 6âˆ’ Ç« dimensional effective action for the random field Ising model derived by BrÃ©zin and De Dominicis. After expansion parameters of physical observables are clarified, we find that the nontrivial fixed point in 6 âˆ’ Ç« dimensions is stable, contrary to the argument by BrÃ©zin and Deâ€¦ (More)

We reexamine the effective action for the d-dimensional random field Ising model derived by BrÃ©zin and De Dominicis. We find a non-Gaussian fixed point where the Ï†4 couplings in the action have various scaling dimensions. The correlation-length exponent in d = 6 âˆ’ Ç« has the value consistent with the argument of the dimensional reduction in the leading order.

- Hideaki Kurata, Satoshi Noda, +11 authors Kazunori Furusawa
- IEICE Transactions
- 2007

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