日本語
The University of Electro-Communications 
Graduate School of Informatics and Engineering, School of Informatics and Engineering 
Department of Computer and Network Engineering, Cluster I (Informatics and Computer Engineering) 

Professor 
Yusaku YAMAMOTO 

Classes responsible within the university
2014  High Performance Computing 2  Spring semester  Undergraduate, daytime  Subject in specialty 
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Current research areas
Computational science 

Published books
Book  計算科学のためのHPC技術1  片桐孝洋,中田真秀,渡辺宙志,山本有作,吉井範行,Jaewoon Jung,杉田有治,石村和也,大石進一,関根晃太,森倉悠介,黒田久泰  大阪大学出版会  2017/03/01  978-4-87259-586-4 
Book, translated  Computational Science & Engineering  Gilbert Strang  近代科学社  2017/01/30 
Book  応用数理ハンドブック  山本有作  朝倉書店  418-421  2013/10/25 
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Published papers
Paper  Yes  Performance analysis and optimization of the parallel one-sided block Jacobi SVD algorithm with dynamic ordering and variable blocking  Joint  Shuhei Kudo, Yusaku Yamamoto, Martin Becka and Marian Vajtersic  Concurrency and Computation: Practice and Experience  29/ 9  2017/05/10  10.1002/cpe.4059 
Paper  Yes  Probabilistic analysis of an estimator for the Frobenius norm of a matrix product  Joint  Yusaku Yamamoto and Shuhei Kudo  JSIAM Letters  9, 9-12  2017/02/23  10.14495/jsiaml.9.9 
Paper  Yes  Roundoff error analysis of the CholeskyQR2 algorithm in an oblique inner product  Joint  Y. Yamamoto, Y. Nakatsukasa, Y. Yanagisawa and T. Fukaya  JSIAM Letters  8, 5-8  2016 
Paper  Yes  Asymptotic quadratic convergence of the serial block-Jacobi EVD algorithm for Hermitian matrices  Joint  Gabriel Oksa, Yusaku Yamamoto and Marian Vajtersic  Numerische Mathematik  1-25  2016/12/24  10.1007/s00211-016-0863-5 
Paper  Yes  Xeon PhiにおけるDSYRKの並列化手法と性能解析  Joint  工藤 周平, 山本 有作  情報処理学会論文誌コンピューティングシステム(ACS)  9/ 4, 15-24  2016/05/30 
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Research presentations
Oral presentation for an academic conference  Roundoff error analysis of the CholeskyQR2 and related algorithms  International Workshop on Parallel Numerics (PARNUM 2017)  0/ 0  Yes  Yusaku Yamamoto  2017/04/20 
Oral presentation for an academic conference  ブロック化赤-黒順序付けにおけるMILU分解の問題点と緩和係数導入の効果  SWoPP 2016  1/ 1  No  塩谷明美,山本有作  2016/08/09 
Oral presentation for an academic conference  High-Performance Parallelization Method of DSYRK for SVD and other Matrix Computations on Xeon Phi  The 9th International Workshop on Parallel Matrix Algorithms and Applications (PMAA 16)  1/ 1  Yes  Shuhei Kudo and Yusaku Yamamoto  2016/07/07 
Oral presentation for an academic conference  Solution of a Nonlinear Eigenvalue Problem using the Signed Singular Values with Application to the Scaling Exponent Computation in 2 Dimensional Turbulent Flow  SIAM: East Asian Section Conference 2016 (EASIAM 2016)  117  No  Yusaku Yamamoto  2016/06/21 
Oral presentation for an academic conference  Xeon PhiにおけるDSYRKの並列化手法と性能解析  2016年ハイパフォーマンスコンピューティングと計算科学シンポジウム(HPCS2016)  1/ 1  Yes  工藤周平,山本有作  2016/06/06 
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