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Affiliation |
Engineering educational research section Electrical and Electronic System Program |
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Professor |
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External Link |
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TAKEI Amane
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Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
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Informatics / Computational science
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering
Papers 【 display / non-display 】
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Application of Direct Sparse Solver Based on Multi-frontal Method for Fast and Stable Large-scale Microwave Finite Element Method Simulation Reviewed
2026.1
Authorship：Corresponding author Publishing type：Research paper (scientific journal)
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Microwave Parallel FEM based on Iterative Domain Decomposition Method Reviewed
Takei A., Sakamoto M.
Proceedings of International Conference on Artificial Life and Robotics 448 - 451 2026
Publishing type：Research paper (scientific journal) Publisher：Proceedings of International Conference on Artificial Life and Robotics
This paper describes large-scale parallel microwave numerical calculations based on the finite element method (FEM) with an iterative domain decomposition method. A stationary vector wave equation for the high-frequency electromagnetic field analyses is solved taking an electric field as an unknown function. Although this solver is capable of detailed, fast and efficient FEM of large-scale high-frequency electromagnetic problems using the iterative domain decomposition method (IDDM) and the corresponding parallel distributed processing environment, it still requires a large number of iterative computation trials and computation time. In this study, we found that increasing the size of the subdomain in the IDDM improves the convergence of the accuracy of the iterative method and reduces the computation time. We are also considering replacing the solver with a subdomain solver that can handle larger subdomains.
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Study on GPGPU Computing of Subdomain Solver in High-Frequency Electromagnetic Field Analysis Reviewed
Biki B.B., Ohnaka K., Sakamoto M., Takei A., Goto S.
Proceedings of International Conference on Artificial Life and Robotics 452 - 456 2026
Publishing type：Research paper (scientific journal) Publisher：Proceedings of International Conference on Artificial Life and Robotics
This study presents GPU acceleration of a subdomain solver for high-frequency electromagnetic field analysis using the finite element method (FEM). The solver is a direct sparse solver based on a parallel multi frontal algorithm implemented using NVIDIA's cuDSS library for sparse matrix factorization and solution. Implemented within the ADVENTURE_FullWave framework, the approach achieves efficient parallel computation of subdomain problems on GPGPU platforms. Benchmark results demonstrate significant speedup compared with CPU execution, confirming the effectiveness of cuDSS-based GPGPU computing for large-scale electromagnetic simulations.
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Unsupervised Defect Detection for Automatic Shiitake Sorting Reviewed
Nokura S., Kimura L., Ishimaru T., Oshikawa Y., Ikeda S., Aoki K., Ohe K., Takei A., Kawamura R., Sakamoto M., Sugimoto K.
Proceedings of International Conference on Artificial Life and Robotics 430 - 433 2026
Publishing type：Research paper (scientific journal) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Automated shiitake sorting faces severe data imbalance (1,731 good vs. 241 defective images) and annotation difficulties. We compared data augmentation and unsupervised detection. First, augmenting scarce defective data with GANs failed; models either lost subtle defect features (e.g., discoloration) during pre-processing or overfit to augmentation patterns, proving label-less augmentation difficult. We then shifted to unsupervised anomaly detection (VAE+OC-SVM) trained only on good data. This model achieved perfect Recall (100%) for the defective class, identifying all bad items without a single miss. This Recall 100% capability demonstrates its high practical utility as a primary screening tool for quality control, particularly where preventing defective product leakage is prioritized (albeit with low precision). This approach highlights a path for automated sorting in data-scarce agricultural settings and suggests high transferability to other products (e.g., tomato, potato) with similar data constraints.
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Broadening Access-to Creative Experience with MR 3D Painting Reviewed
Ishimaru T., Oshikawa Y., Nokura S., Ikeda S., Aoki K., Ohe K., Takei A., Kawamura R., Sakamoto M.
Proceedings of International Conference on Artificial Life and Robotics 421 - 425 2026
Publishing type：Research paper (scientific journal) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Access to arts experiences varies by income and locality, creating an experience divide. We present a low-barrier mixed-reality (MR) 3D-painting system on Meta Quest 3 that renders strokes in the user's surrounding space in passthrough MR. We conducted two complementary studies: an in-the-wild festival study with local children (MR 3D free creation) and a controlled study with university students enabling within-participant comparisons across free 2D drawing, free 3D drawing (with depth), and prompted 3D drawing. After each condition, participants rated immersion, accomplishment, perceived creativity, self-efficacy, intention to continue, and usability (plus two free-creation items) on 5-point Likert scales, and collaboration was assessed in paired tasks. We report condition-wise medians and within-participant median differences. Results suggest that MR can deliver meaningful creative experiences with minimal setup in everyday spaces and inform how task framing supports depth-oriented 3D creation.
Books 【 display / non-display 】
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Advanced Software Technologies for Post-Peta Scale Computing
Ryuji Shioya, Masao Ogino, Yoshitaka Wada, Kohei Murotani, Seiichi Koshizuka, Hiroshi Kawai, Shin-ichiro Sugimoto, Amane Takei（ Role： Joint author）
Springer 2019.1
Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
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Coupled simulation of vibration and sound field of Stradivari’s violin Reviewed
Yokoyama M., Takei A., Shioya R., Yagawa G.
Proceedings of Meetings on Acoustics 51 ( 1 ) 2023.5
Publishing type：Rapid communication, short report, research note, etc. (scientific journal) Publisher：Proceedings of Meetings on Acoustics
A coupled simulation of the vibration and sound radiation of Stradivari violins, scanned using a micro-computed tomography scanner, was conducted using the finite element method. The aim of this study was to clarify the relationship between the vibration of the violin body and acoustic radiation around the violin. The highly precise geometry of a violin made by Stradivari was scanned using a micro-computed tomography scanner, and the material properties of the violin body (spruce and maple) were set as orthotropic properties in the numerical simulation. Additionally, the results of numerical simulations coupling the vibrations caused by forced oscillations on a bridge with the acoustic field pressure around the violin are shown. Furthermore, the sound pressure spread in a wide rectangular box was calculated by large-scale computing using an open-source parallel acoustic analysis software.
DOI： 10.1121/2.0001776
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Special Section on Recent Advances in Simulation Techniques and Their Applications for Electronics Reviewed
Kezuka A., Sonoda J., Ando Y., Angkaew T., Chen C.P., Chiou Y.P., Hirano T., Ishibashi H., Kimura H., Kishimoto S., Laakso I., Takei A., Tan E.L., Tsuji Y., Shibayama J.
IEICE Transactions on Electronics E105.C ( 11 ) 2022.11
Publishing type：Rapid communication, short report, research note, etc. (scientific journal) Publisher：IEICE Transactions on Electronics
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電気電子機器の環境安全評価の高精度化に向けた並列渦電流解析の検討
大高智司，武居周
2022年電子情報通信学会 総合大会ISS特別企画「ジュニア＆学生ポスターセッション」講演原稿 2022.3
Authorship：Corresponding author Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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低周波治療の高度化に向けた，高精度人体内電流密度解析手法の基礎的検討
岩城拓，武居周
2022年電子情報通信学会 総合大会ISS特別企画「ジュニア＆学生ポスターセッション」講演原稿 2022.3
Authorship：Corresponding author Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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超音波診断の事前予測の高度化に向けた，高並列人体音響解析の基礎検討
野村龍希，武居周
2022年電子情報通信学会 総合大会ISS特別企画「ジュニア＆学生ポスターセッション」講演原稿 2022.3
Authorship：Corresponding author Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
Presentations 【 display / non-display 】
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大規模FullWave電磁界解析ソフトウエア：ADVENTURE_FullWaveのいまとこれから Invited
武居周
日本機械学会RC301研究会 2025.3.25
Event date： 2025.3.25
Language：Japanese Presentation type：Oral presentation (invited, special)
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Basic Study of Electromagnetic Field System Inverse Analysis Using PINNs
OHNAKA Kento, TAKEI Amane
The Proceedings of The Computational Mechanics Conference 2025 The Japan Society of Mechanical Engineers
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Convergence Characteristics of the Domain Decomposition Method for Fullwave Electromagnetic Finite Element Method with Sparse and Dense Brick Elements
MURAYAMA Toshio, GOTO Sota, FUJII Hideki, TAKEI Amane
The Proceedings of The Computational Mechanics Conference 2025 The Japan Society of Mechanical Engineers
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Study for speeding and stabilizing High-frequency Electromagnetic Field Analysis Based on Finite Element Method
YAMADA Taiga, TAKEI Amane
The Proceedings of The Computational Mechanics Conference 2025 The Japan Society of Mechanical Engineers
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Electro-Thermal Coupled Analysis Considering Human Posture Changes for Estimation of Electric Shock Points
NOMURA Masamune, TAKEI Amane, TARAO Hiroh
The Proceedings of The Computational Mechanics Conference 2025 The Japan Society of Mechanical Engineers
Works 【 display / non-display 】
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設計用大規模計算力学システムADVENTURE System
2023.4.1
Work type：Software
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マイクロ波解析ソフトウエアADVENTURE_FullWave
2019.4.1
Work type：Software
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音響解析ソフトウエアADVENTURE_Sound
2019.4.1
Work type：Software
Awards 【 display / non-display 】
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Award for Outstanding JSST Paper
2022.8
Award type：International academic award (Japan or overseas) Country：Japan
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The 2021 JACM Fellows Awards
2021.7 日本計算力学連合
武居周
Award type：International academic award (Japan or overseas) Country：Japan
計算力学分野で顕著な業績を上げ，JACMへのサポート，およびIACM関連国際学会に貢献した研究者に対して与えられる． 受賞者は主に日本国内において活動した研究者（外国人も含む）とする．
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電子情報通信学会 エレクトロニクス シミュレーション研究会 優秀論文発表賞
2021.3 電子情報通信学会 オープンソース・ソフトウエア：ADVENTURE_Fullwaveの開発
武居周
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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学術奨励賞
2024.3 電子情報通信学会九州支部
大中健登 (Supervising Student)
Country：Japan
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研究奨励表彰
2022.3 九州パワーアカデミー
野村政宗 (Supervising Student)
Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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医療マイクロ波機器利用環境の患者個別デジタルツイン解析 研究課題
Grant number：24H00695 2024.04 - 2029.03
日本学術振興会 科学研究費補助金 基盤研究(A)
Authorship：Principal investigator Grant type：Competitive
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Non-linear acoustic analysis based on wave acoustics and fluid parallel coupling calculation for sound field design of ultrasonic speakers
Grant number：22K19779 2022.06 - 2025.03
Authorship：Principal investigator Grant type：Competitive
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Mutual construction of different numerical analysis platforms
Grant number：18KK0278 2018.10 - 2024.03
Grant-in-Aid for Scientific Research Promotion of Joint International Research (Fostering Joint International Research (B))
Authorship：Principal investigator
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並列連成解析手法による高精度な温熱療法シミュレーションの実現
Grant number：17H03256 2017 - 2020.03
科学研究費補助金 基盤研究(B)
Authorship：Principal investigator
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電磁場・固体連成解析のハイケーパビリティ計算を実現する数値計算法
Grant number：23K24861 2024.04 - 2027.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(B)
Authorship：Coinvestigator(s)
Available Technology 【 display / non-display 】
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大規模数値電磁界解析手法の開発
電磁環境影響評価手法の開発
人体内部を対象とした電磁界解析手法の研究Message：上記の電磁界解析以外にも構造解析をはじめとする数値解析手法のものづくりへの適用、CAEの導入方法などの技術相談が可能です。また、技術相談の内容をテーマとした共同研究も可能ですので、お気軽にご相談ください。