Personal date

Name: Masaru NAGASO
Address: Singapore

github, gitlab, linkedin, researchgate

Language

  • English (fluent)
  • French (intermediate)
  • Japanese (native)

Experience

03.jan.2022 - Present

Research fellow
Mathematical Imaging and Geophysics Group, Nanyang Technological University / Earth Observatory of Singapore, Singapore Lead developer of the project TomoATT (HPC-ready eikonal solver based adjoint state seismic tomographic library).

01.june.2019–31.dec.2021

Postdoctral research assistant
CNRS-LMA, Marseille, France
Co-lead developer of SPECFEM3D for the ChEESE project, which is an international project in the domain of geoscience for preparing Exascale HPC, founded by the European Union’s Horizon 2020. I/O optimization and design/development of a workflow for full-wave inversion calculation on Exascale HPC machines.

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01.oct.2018–31.may.2019

Scientific researcher
Protisvalor/IUT-LCND, Aix-en-Procenve, France
Large-scale numerical simulation of an ultrasonic wave in the new generation of Sodium-cooled Fast Reactors (SFR) with Spectral Element Method (SEM: a higher-order finite element method). Development of a numerical library for accessing large-sized calculation data and post-processing.

01.jan.2016–30.jun.2019

Scientific software developer
Hanoi, Vietnam (Remote)
Development of scientific computation libraries.

  • Network hierarchical clustering application which performs the Louvain method for calculating Modularity and Map equation.
  • Python scripts for Natural Language Processing (NLP).
  • Web scraping system for parallel and massive data acquisition.
  • Numerical library for estimating “Disease time” in Alzheimer’s disease, which partly uses nonlinear mixed effect and covariate modeling.

02.fev.2015–31.may.2018

PhD candidate
CEA Cadarache, Saint-Paul-lez-Durance, France
Research and development of numerical modeling method for wave propagation in a realistic fluctuating acoustic medium.
2D and 3D elasto-acoustic wave propagation simulation in Sodium-cooled fast reactors, which is an application for acoustic thermometry to detect accurate and instantaneous temperature in sodium jets.

Education

2015–2018 PhD Aix-Marseille University
Aix-en-Procenve, France
Acoustics

2011–2014 MSc The University of Tokyo
Tokyo, Japan
Ocean Technology, Policy and Environment

2007–2011 BSc Tokyo University of Science
Chiba, Japan
Mechanical Engineering

PhD thesis

Title:

Study of ultrasound wave propagation in a heterogeneous fluid medium for the continuous monitoring of an operating sodium-based nuclear reactor.

Supervisors:

Dr. Dimitri Komatitsch, Prof. Joseph Moysan
(Laboratoire de mécanique et d’acoustique(LMA), CNRS/L’université d’Aix-Marseille)
Dr. Christian Lhuillier
(Le Laboratoire d’instrumentations et d’essais technologiques, CEA Cadarache)

Description:

Application of spectral element method and finite-element time-domain methods for wave propagation simulation in a heterogeneous medium.
Numerical modeling of a wave propagation in side of 4th generation sodium cooled fast reactor.
Two french super computers, CURIE@TGCC/CEA, OCCIGEN@CINES were used for making 4D (3D wave simulation + temporal fluctuating heterogeneous situation) massive calculations.

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Master thesis

Title:

Development of the three-dimensional visualization and measurement method for identification of sex and species of small size fish using 25MHz-focusing acoustic probe.

Supervisors:

Prof. Akira Asada
(The Underwater Acoustic System Engineering Laboratory, Institute of Industrial Science, The University of Tokyo)

Description:

Acoustic measurement of fish bodies using a high-frequency focusing acoustic probe.
Development of a software for acoustic signal processing and 3D visualization of fish bodies, acoustic reflection intensity image of body surface and internal organs.

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FDTD simulation of a wave propagation inside of fish bodies.
(Implementation of FDTD for elastic wave and PML damping layer.)

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Bachelor thesis

Title:

Elasto-plastic J-integral calculation using the tetrahedral finite element model.}}

Supervisors:

Prof. Hiroshi Okada
(The Laboratory of Computational Solid Mechanics, Tokyo University of Science)

Description:

Application of J-integral method to elasto-plastic FEM analysis using tetrahedral mesh.
Improvement of mesh generation software for FEM analysis.

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