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- Yusuke Arakawa, Mitsuo Shimada, +5 authors Hiroki Mori
- Hepatology research : the official journal of the…
- 2008

Although a mucoepidermoid carcinoma is sometimes seen as a neoplasm originating from the salivary glands, its origination from the liver is rare. A review of the medical literature in the English language disclosed only 16 cases originating from the hepatic system. The case explored here is that of an 81-year-old female, without any significant medical… (More)

- Makoto Mizuguchi, Akitoshi Takayasu, Takayuki Kubo, Shin'ichi Oishi
- SIAM J. Numerical Analysis
- 2017

This paper presents a numerical method of verifying existence and local uniqueness of a solution for an initial-boundary value problem of semi-linear parabolic equations. The main theorem of this paper gives a sufficient condition for enclosing the solution in a neighborhood of a numerical solution. In the formulation of this paper, the initial-boundary… (More)

- Hiromitsu Fujii, Takayuki Kubo, +6 authors Hajime Asama
- SIGGRAPH ASIA Posters
- 2014

Three-dimensional analysis of the aurora which is an atmospheric phenomenon is significant because the shape of aurora reflects the electromagnetic relationship between the Earth and the Sun, which can influence electric equipments such as satellites. To analyze a number of auroras, our research group set two fish-eye cameras in Poker Flat Research Range… (More)

We explore a mechanism of radiative B − L symmetry breaking in analogous to the radiative electroweak symmetry breaking. The breaking scale of B − L symmetry is related to the neutrino masses through the seesaw mechanism. Once we incorporate the U(1) B−L gauge symmetry in SUSY models, the U(1) B−L gaugino, ˜ Z B−L appears, and it can mediate the SUSY… (More)

It is demonstrated that the light Higgs boson scenario, which the lightest Higgs mass is less than the LEP bound, m h > 114.4 GeV, is consistent with the SUSY seesaw model. With the assumptions of the universal right-handed neutrino mass and the hierarchical mass spectrum of the ordinary neutrinos, the bounds for the right-handed neu-trino mass is… (More)

- Naohiro Fukuda, Tamotu Kinoshita, Takayuki Kubo
- 2013 10th International Conference on Information…
- 2013

In this paper, we will find the numerical solution of partial differential equations by using the finite element method with Riesz bases that are elevated from ortho normal bases. Especially for the two-dimensional cases, we also propose another way to solve a matrix-valued equation (Lyapunov equation). Moreover, we give the precise inverse formula for… (More)

- Toru Hirahara, Sergey V Eremeev, +17 authors Evgueni V Chulkov
- Nano letters
- 2017

Inducing magnetism into topological insulators is intriguing for utilizing exotic phenomena such as the quantum anomalous Hall effect (QAHE) for technological applications. While most studies have focused on doping magnetic impurities to open a gap at the surface-state Dirac point, many undesirable effects have been reported to appear in some cases that… (More)

- Makoto Mizuguchi, Akitoshi Takayasu, Takayuki Kubo, Shin'ichi Oishi
- J. Computational Applied Mathematics
- 2017

This paper presents a method of numerical verification for existence of a global-in-time solution to a class of semilinear parabolic equations. Such a method is based on two main theorems in this paper. One theorem gives a sufficient condition for proving existence of a solution to the semilinear parabolic equations with the initial point t = t ′ ≥ 0. If… (More)

Anomaly mediated supersymmetry breaking implemented in the minimal super-symmetric standard model (MSSM) is known to suffer from the tachyonic slepton problem leading to breakdown of electric charge conservation. We show however that when MSSM is extended to explain small neutrino masses by gauging the B-L symmetry , the slepton masses can be positive due… (More)