A
Akira Imakura
Researcher at University of Tsukuba
Publications - 100
Citations - 732
Akira Imakura is an academic researcher from University of Tsukuba. The author has contributed to research in topics: Eigenvalues and eigenvectors & Krylov subspace. The author has an hindex of 10, co-authored 86 publications receiving 517 citations. Previous affiliations of Akira Imakura include Nagoya University.
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Journal ArticleDOI
Simulations of Core-collapse Supernovae in Spatial Axisymmetry with Full Boltzmann Neutrino Transport
Hiroki Nagakura,Wakana Iwakami,Wakana Iwakami,Shun Furusawa,Hirotada Okawa,Hirotada Okawa,Akira Harada,Kohsuke Sumiyoshi,Shoichi Yamada,Hideo Matsufuru,Akira Imakura +10 more
TL;DR: In this article, the first results of the spatially axisymmetric core-collapse supernova simulations with full Boltzmann neutrino transport were presented, which amount to a time-dependent five-dimensional (two in space and three in momentum space) problem.
Journal ArticleDOI
Simulations of core-collapse supernovae in spatial axisymmetry with full Boltzmann neutrino transport
Hiroki Nagakura,Wakana Iwakami,Wakana Iwakami,Shun Furusawa,Hirotada Okawa,Hirotada Okawa,Akira Harada,Kohsuke Sumiyoshi,Shoichi Yamada,Hideo Matsufuru,Akira Imakura +10 more
TL;DR: In this article, the first results of spatially axisymmetric core-collapse supernova simulations with full Boltzmann neutrino transport were presented, which amount to a time-dependent 5-dimensional (2 in space and 3 in momentum space) problem in fact.
Journal ArticleDOI
A block Arnoldi-type contour integral spectral projection method for solving generalized eigenvalue problems
TL;DR: This study concludes that the Rayleigh–Ritz-type of the contour integral spectral projection method is mathematically equivalent to the Arnoldi method with the projected vectors obtained from thecontour integration.
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Three-dimensional Boltzmann-Hydro code for core-collapse in massive stars II. The Implementation of moving-mesh for neutron star kicks
Hiroki Nagakura,Hiroki Nagakura,Wakana Iwakami,Wakana Iwakami,Shun Furusawa,Kohsuke Sumiyoshi,Shoichi Yamada,Hideo Matsufuru,Akira Imakura +8 more
TL;DR: In this paper, a moving-mesh technique for the multi-dimensional Boltzmann-Hydro code for the simulation of core-collapse supernovae (CCSNe) is presented.
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Relationships among contour integral-based methods for solving generalized eigenvalue problems
TL;DR: All contour integral-based eigensolvers can be regarded as projection methods and can be categorized based on their subspace used, the type of projection and the problem to which they are applied implicitly.