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J-GLOBAL ID：200901068079185908 Update date: Mar. 14, 2025

Yamada Susumu

ヤマダススム | Yamada Susumu

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Affiliation and department：
Job title：研究主幹

Research field (1)： Software

Research keywords (4)：数値解析 , 並列計算 , numerical analysis , parallel computing

Research theme for competitive and other funds (10)：

2022 - 2025 Study of high performance and accuracy eigenvalue solvers for quantum many-body systems
2018 - 2023 エクサスケール計算機を想定した量子モデルシミュレーションに対する並列化・高速化
2019 - 2022 Multiphase fluid behavior simulation in a nuclear reactor using a GPU supercomputer
2015 - 2018 High perfoemance computing for quamtum many-body problem using accelerators
2011 - 2013 Development of parallelization strategy and speedup technique for 2D quamntum system on many-core parallel machines

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Papers (122)：

Shi W.*, Machida Masahiko, Yamada Susumu, Okamoto Koji. Uncertainty analysis of the inverse LASSO estimation scheme on radioactive source distributions inside reactor building rooms from air does rate measurements. Progress in Nuclear Energy. 2025. 184. 105710\_1-105710\_10
Yamada Susumu, Machida Masahiko, Tanimura Naoki*. Selection method for observation points using Bayesian LASSO at estimating radiation source distribution from air dose rates. EPJ Web of Conferences. 2024. 302. 16004\_1-16004\_10
Yamada Susumu, Yoshida Toru*, Hasegawa Yukihiro*, Machida Masahiko. Effectiveness of fused LASSO for prediction of distribution of radioactive materials in reactor buildings. Proceedings of Waste Management Symposia 2024 (WM2024) (Internet). 2024. 15
Machida Masahiko, Iwata Ayako, Yamada Susumu, Otosaka Shigeyoshi*, Kobayashi Takuya, Funasaka Hideyuki*, Morita Takami*. Estimation of temporal variation of discharged inventory of radioactive strontium $^{90}$Sr ($^{89}$Sr) from port of Fukushima Daiichi Nuclear Power Plant; Analysis of the temporal variation from the accident to March 2022 and evaluation of its impact on Fukushima coast and offshore areas. Nihon Genshiryoku Gakkai Wabun Rombunshi (Internet). 2023. 22. 4. 119-139
Shi W.*, Machida Masahiko, Yamada Susumu, Yoshida Toru*, Hasegawa Yukihiro*, Okamoto Koji*. Inverse estimation scheme of radioactive source distributions inside building rooms based on monitoring air dose rates using LASSO; Theory and demonstration. Progress in Nuclear Energy. 2023. 162. 104792\_1-104792\_19

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MISC (89)：

Machida Masahiko, Yamada Susumu, Kim M., Tanaka Satoshi*, Tobita Yasuhiro*, Iwata Ayako*, Aoki Yuto, Aoki Kazuhisa, Yanagisawa Kenichi*, Yamaguchi Takashi, et al. R\&D status of digital technology on inverse estimation of radioactive source distributions and related source countermeasures; Fast Digital Twin Tech. in Decommissioning Field: 3D-ADRES-Indoor FrontEnd. RIST News. 2024. 70. 3-22
Machida Masahiko, Yamada Susumu, Kim M., Okumura Masahiko, Miyamura Hiroko, Shikaze Yoshiaki, Sato Tomoki*, Numata Yoshiaki*, Tobita Yasuhiro*, Yamaguchi Takashi, et al. R\&D of digital technology on inverse estimation of radioactive source distributions and related source countermeasures; R\&D status of digital platform including 3D-ADRES-indoor. RIST News. 2023. 69. 2-18
Machida Masahiko, Iwata Ayako, Yamada Susumu, Otosaka Shigeyoshi*, Kobayashi Takuya, Funasaka Hideyuki*, Morita Takami*. Estimation of temporal variation of tritium inventory discharged from the port of Fukushima Dai-ichi Nuclear Power Plant; Analysis of the temporal variation and comparison with released tritium inventories from Japan and world major nuclear facilities. Journal of Nuclear Science and Technology. 2023. 60. 3. 258-276
Machida Masahiko, Yamada Susumu, Kim M., Okumura Masahiko, Miyamura Hiroko, Malins A., Shikaze Yoshiaki, Sato Tomoki*, Numata Yoshiaki*, Tobita Yasuhiro*, et al. R\&D of digital technology on inverse estimation of radioactive source distributions and related source countermeasures; R\&D status of digital platform including 3D-ADRES-indoor. RIST News. 2022. 68. 3-19
町田昌彦, 岩田亜矢子, 山田進, 乙坂重嘉, 小林卓也, 船坂英之, 森田貴己. Estimation of Temporal Variation of Discharged Tritium from Port of Fukushima Dai-ichi Nuclear Power Plant: Analysis of the Temporal Variation and Comparison with released Tritium from Japan and Major Nuclear Facilities Worldwide. 日本原子力学会和文論文誌. 2022. 21. 1

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Lectures and oral presentations (218)：

R\&D on machine learning techniques for estimating radiation sources from measured air dose rates
(第18回放射線計測フォーラム福島)
Radiocesium mobility in the environment after the Fukushima Dai-ichi Nuclear Power Plant accident; Simulation study on $^{137}$Cs behavior in brackish lake, Matsukawa-ura Lagoon
(6th International Conference on Radioecology \& Environmental Radioactivity (ICRER 2024))
Development of a numerical method to optimize measures against radioactive sources estimated by a machine learning technique
(日本原子力学会2024年秋の大会)
Research and development of digital technologies to explore radiation source distributions for exposure reduction; Development status based on evaluation tests inside 1F Unit 5
(8th International Forum on the Decommissioning of the Fukushima Daiichi Nuclear Power Station (1FD8))
High performance algorithm for calculating contribution rates for estimating radiation distributions using GPUs
(日本原子力学会2024年春の年会)

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Professional career (1)：

Doctor (Information Science) (Tohoku University)

Association Membership(s) (1)：

The Japan Society for Industrial and Applied Mathematics

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