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- Masato Hisakado
- 1996

We discussed relations between the full unitary matrix models and the Painlevé III. Coupling the Toda equations and the string equations, we derive a special case of the P III equation. From the Virasoro constrains, we can use the radial coordinate. The relation between t1 and t−1 is like the complex conjugate.

- A Atkins, N R Wyborn, +6 authors J Green
- The Journal of biological chemistry
- 2000

The novel pore-forming toxin hemolysin E (HlyE, ClyA, or SheA) consists of a long four-helix bundle with a subdomain (beta tongue) that interacts with target membranes at one pole and an additional helix (alpha(G)) that, with the four long helices, forms a five-helix bundle (tail domain) at the other pole. Random amino acid substitutions that impair… (More)

- Shintaro Mori, Masato Hisakado, Taiki Takahashi
- Physical review. E, Statistical, nonlinear, and…
- 2012

Observational learning is an important information aggregation mechanism. However, it occasionally leads to a state in which an entire population chooses a suboptimal option. When this occurs and whether it is a phase transition remain unanswered. To address these questions we perform a voting experiment in which subjects answer a two-choice quiz… (More)

- Shintaro Mori, Masato Hisakado, Taiki Takahashi
- ArXiv
- 2012

Shintaro Mori1 , Masato Hisakado2, and Taiki Takahashi3,4 1Department of Physics, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa 252-0373, Japan 2Standard and Poor’s 1-6-5 Marunouchi, Chiyoda-ku, Tokyo 100-0005, Japan 3 Department of Behavioral Science, Faculty of Letters and Center for Experimental Research in Social Sciences, Hokkaido… (More)

- Masato Hisakado
- 1998

We consider the (coupled) Davey-Stewartson (DS) system and its Bäcklund transformations (BT). Relations among the Davey-Stewartson system, the double KadomtsevPetviashvili (KP) system and the Ablowitz-Ladik hierarchy (ALH) are established. The DS hierarchy and the double KP system are equivalent. The ALH is the BT of the DS system in a certain reduction.… (More)

- Shunsuke Yoshida, Masato Hisakado, Shintaro Mori
- New Generation Computing
- 2016

We obtain the conditions for the emergence of the swarm intelligence effect in an interactive game of restless multi-armed bandit (rMAB). A player competes with multiple agents. Each bandit has a payoff that changes with a probability p c per round. The agents and player choose one of three options: (1) Exploit (a good bandit), (2) Innovate (asocial… (More)

- Shintaro Mori, Kazuaki Nakayama, Masato Hisakado
- Physical review. E
- 2016

We study a simple model for social learning agents in a restless multiarmed bandit. There are N agents, and the bandit has M good arms that change to bad with the probability q_{c}/N. If the agents do not know a good arm, they look for it by a random search (with the success probability q_{I}) or copy the information of other agents' good arms (with the… (More)

- Masato Hisakado
- 2008

We study the full unitary matrix models. Introducing a new term l logU , l plays the role of the discrete time. On the other hand, the full unitary matrix model contains a topological term. In the continuous limit it gives rise to a phase transition at θ = π. The ground state is characterize by the discrete time l. The discrete time l plays like the… (More)

- Masato Hisakado
- 2008

The soliton structure of a gauge theory proposed to describe chiral excitations in the multi-Layer Fractional Quantum Hall Effect is investigated. A new type of derivative multi-component nonlinear Schrödinger equation emerges as effective description of the system that supports novel chiral solitons. We discuss the classical properties of the solutions and… (More)

- S Mori, K Kitsukawa, M Hisakado
- 2009

This paper generalizes Moody’s correlated binomial default distribution for homogeneous (exchangeable) credit portfolio, which is introduced by Witt, to the case of inhomogeneous portfolios. As inhomogeneous portfolios, we consider two cases. In the first case, we treat a portfolio whose assets have uniform default correlation and non-uniform default… (More)