57 citations · 476 across the 23 of their papers we have counts for
23 papers
Learning Neural PDE Solvers with Parameter-Guided Channel Attention
Makoto Takamoto, Francesco Alesiani, Mathias Niepert
Scientific Machine Learning (SciML) is concerned with the development of learned emulators of physical systems governed by partial differential equations (PDE). In application doma…
PDEBENCH: An Extensive Benchmark for Scientific Machine Learning
Makoto Takamoto, Timothy Praditia, Raphael Leiteritz +4
Machine learning-based modeling of physical systems has experienced increased interest in recent years. Despite some impressive progress, there is still a lack of benchmarks for Sc…
milIE: Modular & Iterative Multilingual Open Information Extraction
Bhushan Kotnis, Kiril Gashteovski, Daniel Oñoro Rubio +5
Open Information Extraction (OpenIE) is the task of extracting (subject, predicate, object) triples from natural language sentences. Current OpenIE systems extract all triple slots…
An Empirical Study of the Effects of Sample-Mixing Methods for Efficient Training of Generative Adversarial Networks
Makoto Takamoto, Yusuke Morishita
It is well-known that training of generative adversarial networks (GANs) requires huge iterations before the generator's providing good-quality samples. Although there are several…
An Efficient Method of Training Small Models for Regression Problems with Knowledge Distillation
Makoto Takamoto, Yusuke Morishita, Hitoshi Imaoka
Compressing deep neural network (DNN) models becomes a very important and necessary technique for real-world applications, such as deploying those models on mobile devices. Knowled…
Evolution of three-dimensional Relativistic Ion Weibel Instability: Competition with Kink Instability
Makoto Takamoto, Yosuke Matsumoto, Tsunehiko N. Kato
In this paper, we report our recent findings on the relativistic Weibel instability and its nonlinear saturation by performing numerical simulations of collisionless plasmas. Analy…
Magnetic Field Saturation of the Ion Weibel Instability in Interpenetrating Relativistic Plasmas
Makoto Takamoto, Yosuke Matsumoto, Tsunehiko N. Kato
The time evolution and saturation of the Weibel instability at the ion Alfvén current are presented by ab initio particle-in-cell simulations. We found that the ion Weibel current…
Evolution of 3-dimensional Relativistic Current Sheets and Development of Self-Generated Turbulence
Makoto Takamoto
In this paper, the temporal evolution of 3-dimensional relativistic current sheets in Poynting-dominated plasma is studied for the first time. Over the past few decades, a lot of e…
Strong Coupling of Alfvén and Fast Modes in Compressible Relativistic Magnetohydrodynamic Turbulence in Magnetically-Dominated Plasmas
Makoto Takamoto, Alexandre Lazarian
In this paper, we report our detailed analysis of the new strong-coupling regime between Alfvén and fast modes in Poynting-dominated plasma turbulence, reported in our previous wor…
Compressible Relativistic Magnetohydrodynamic Turbulence in Magnetically-Dominated Plasmas And Implications for A Strong-Coupling Regime
Makoto Takamoto, Alexandre Lazarian
In this Letter, we report compressible mode effects on relativistic magnetohydrodynamic (RMHD) turbulence in Poynting-dominated plasmas using 3-dimensional numerical simulations. W…
Theory and Applications of Non-Relativistic and Relativistic Turbulent Reconnection
A. Lazarian, G. Kowal, M. Takamoto +2
Realistic astrophysical environments are turbulent due to the extremely high Reynolds numbers. Therefore, the theories of reconnection intended for describing astrophysical reconne…
Turbulent Reconnection in Relativistic Plasmas And Effects of Compressibility
Makoto Takamoto, Tsuyoshi Inoue, Alexandre Lazarian
We report turbulence effects on magnetic reconnection in relativistic plasmas using 3-dimensional relativistic resistive magnetohydrodynamics simulations. We found reconnection rat…
Thermal synchrotron radiation from RRMHD simulations of the double tearing mode reconnection - Application to the Crab flares
Makoto Takamoto, J. Pétri, H. Baty
We study the magneto-hydrodynamic tearing instability occurring in a double current sheet configuration when a guide field is present. This is investigated by means of resistive re…
Rapid cosmic-ray acceleration at perpendicular shocks in supernova remnants
Makoto Takamoto, John G. Kirk
Perpendicular shocks are shown to be rapid particle accelerators that perform optimally when the ratio of the shock speed to the particle speed roughly equals the ratio…
The Evolution of High Temperature Plasma in Magnetar Magnetospheres and its Implications for Giant Flares
Makoto Takamoto, Shota Kisaka, Takeru Suzuki +1
In this paper we propose a new mechanism describing the initial spike of giant flares in the framework of the starquake model. We investigate the evolution of a plasma on a closed…
Evolution of the Relativistic Plasmoid-Chain in the Poynting-Dominated Plasma
Makoto Takamoto
In this paper, we investigate the evolution of the plasmoid-chain in a Poynting-dominated plasma. We model the relativistic current sheet with cold background plasma using the rela…
A new scheme of causal viscous hydrodynamics for relativistic heavy-ion collisions: A Riemann solver for quark-gluon plasma
Yukinao Akamatsu, Shu-ichiro Inutsuka, Chiho Nonaka +1
In this article, we present a state-of-the-art algorithm for solving the relativistic viscous hydrodynamics equation with the QCD equation of state. The numerical method is based o…
An Alternative Numerical Method for the Stationary Pulsar Magnetosphere
Yohsuke Takamori, Hirotada Okawa, Makoto Takamoto +1
Stationary pulsar magnetospheres in the force-free system are governed by the pulsar equation. In 1999, Contopoulos, Kazanas, and Fendt (hereafter CKF) numerically solved the pulsa…
Enhanced Dissipation Rate of Magnetic Field in Striped Pulsar Winds by the Effect of Turbulence
Makoto Takamoto, Tsuyoshi Inoue, Shu-ichiro Inutsuka
In this letter we report on turbulent acceleration of the dissipation of magnetic field in the postshock re- gion of a Poynting flux-dominated flow, such as the Crab pulsar wind ne…
A Fast Numerical Scheme for Causal Relativistic Hydrodynamics with Dissipation
Makoto Takamoto, Shu-ichiro Inutsuka
In this paper, we develop a stable and fast numerical scheme for relativistic dissipative hydrodynamics based on Israel-Stewart theory. Israel-Stewart theory is a stable and causal…
A New numerical scheme for resistive relativistic MHD using method of characteristics
Makoto Takamoto, Tsuyoshi Inoue
We present a new numerical method of special relativistic resistive magnetohydrodynamics with scalar resistivity that can treat a range of phenomena, from nonrelativistic to relati…
The relativistic kinetic dispersion relation: Comparison of the relativistic Bhatnagar-Gross-Krook model and Grad's 14-moment expansion
Makoto Takamoto, Shu-ichiro Inutsuka
In this paper, we study the Cauchy problem of the linearized kinetic equations for the models of Marle and Anderson-Witting, and compare these dispersion relations with the 14-mome…
Analysis of the Relaxation Process using Non-Relativistic Kinetic Equation
Makoto Takamoto, Shu-ichiro Inutsuka
We study the linearized kinetic equation of relaxation model which was proposed by Bhatnagar, Gross and Krook (also called BGK model) and solve the dispersion relation. Using the s…