HPC Asia 2018 Best Paper Award Wave propagation simulation of complex multi-material problems with fast low-order unstructured finite-element meshing and analysis
受賞者: [9-7] K. Fujita, K. Katsushima, T. Ichimura, M. Horikoshi, K. Nakajima, M. Hori, L. Maddegedara
2017年11月
Fourth Workshop on Accelerator Programming Using Directives in conjunction with SC17 (The International Conference for High Performance Computing, Networking, Storage and Analysis) Best Paper Award Implicit Low-Order Unstructured Finite-Element Multiple Simulation Enhanced by Dense Computation using OpenACC
受賞者: T. Yamaguchi, K. Fujita, T. Ichimura, M. Hori, M. Lalith, K. Nakajima
2014年12月
20th IEEE International Conference for Parallel and Distributed Systems (ICPADS 2014) Best Paper Award Optimization of Serial and Parallel Communications for Parallel Geometric Multigrid Method
ICCS 2003 (International Conference on Computational Science) Selected BEST Papers Parallel Finite Element Analysis Platform for the Earth Simulator: GeoFEM
受賞者: Okuda, H., Nakajima, K., Iizuka, M., Chen, L. and Nakamura, H
2001年6月
HPCN Europe 2001 (High-Performance Computing and Networking), Amsterdam, The Netherlands Best Paper Award Parallel 3D Adaptive Compressible Navier-Stokes Solver in GeoFEM with Dynamic Load-Balancing by DRAMA Library
A new adaptive finite element numerical method has been developed for the unsteady Navier-Stokes equations of incompressible flow in two dimensions. The momentum equations combined with a pressure correction equation are solved employing a nonstag...
K. Nakajima, Y. Kallinderis, I. Sibetheros, R. W. Miksad, K. Lambrakos
Transaction of the ASME Journal of Offshore Mechanics and Arctic Engineering 116 202-208 1994年1月 [査読有り]
A numerical study of the nonlinear and random behavior of flow-induced forces on offshore structures and experimental verification of the results are presented. The numerical study is based on a finite-element method for the unsteady incompressibl...
K. Nakajima, I. Sibetheros, R. W. Miksad, Y. Kallinderis, K. Lambrakos
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE 1 355-361 1994年1月 [査読有り]
A study of the nonlinear and random behavior of flow-induced forces on offshore structure is presented. This study seeks to improve the understanding of the basic hydrodynamics of reversing flow around a cylinder. The experiments use a computer co...
Proceedings of the ASME/JSME International Conference on Nuclear Engineering, ICONE 1 997-1008 1996年12月 [査読有り]
A computer code, WINDFLOW, for a three-dimensional thermo-fluiddynamic analysis of a single phase gaseous flow in a reactor coolant piping has been developed at JAERI. A hybrid grid system composed of triangular and quadrangular cross-sectional ce...
Lecture Notes in Computer Science, High-Performance Computing and Networking, International Conference and Exhibition, HPCN Europe 1997 1225 342-350 1997年5月 [査読有り]
Lecture Notes in Computer Science, High-Performance Computing and Networking, International Conference and Exhibition, HPCN Europe 1998 1401 904-906 1998年4月 [査読有り]
International Journal of Computational Fluid Dynamics 12 315-322 1999年1月
Incomplete Lower-Upper (0) (ILU(0)) factorization is a very effective preconditioning method of iterative solvers for large-scale linear sparse systems in scientific and engineering computations. However, this method requires global data dependenc...
Lecture Notes in Computer Science, High-Performance Computing and Networking, International Conference and Exhibition, HPCN Europe 2001 2110 183-193 2001年4月
Advances in Engineering Software 32 511-518 2001年7月 [査読有り]
GeoFEM, a parallel finite element analysis system, is application software that is being developed for conducting simulations of solid earth. This system is currently run on a massively parallel computer and can perform linear elastic analysis of ...
At present, in order to carry out computer simulations of complex large-scale problems, parallel computers are necessary to store huge amounts of data and to solve such problems in a given practical time. The finite element method (FEM) has been w...
Proceedings of the Fourth Eurographics Workshop on Parallel Graphics and Visualization, EGPGV 2002, Blaubeuren, Germany, September 9-10, 2002 133-140 2002年9月 [査読有り]
Journal of Nuclear Science and Technology 40 12-21 2003年1月 [査読有り]
Effectiveness of debris cooling by water that fills a gap between the debris and the lower head wall was estimated through steady calculations in reactor scale. In those calculations, the maximum coolable debris depth was assessed as a function of...
Parallel Iterative Solves for Solid Earth Simulation on the Earth Simulator
NAKAJIMA, Kengo
Proceedings of Sixth IMACS International Symposium on Iterative Methods in Scientific Computing 181-189 2003年3月 [査読有り]
Hiroshi Okuda, Kengo Nakajima, Mikio Iizuka, Li Chen, Hisashi Nakamura
Lecture Notes in Computer Science 2659 773-780 2003年6月 [査読有り]
GeoFEM has been developed as a finite element solid earth simulator using the Earth Simulator (ES) (35.61 Tflops/peak according to the Linpack benchmark test). It is composed of a platform and some pluggable 'analysis modules' for structural, elec...
Proceedings of the 2003 ACM/IEEE Conference on Supercomputing, SC 2003 2003年11月 [査読有り]
An efficient parallel iterative method with selective blocking preconditioning has been developed for symmetric multiprocessor (SMP) cluster architectures with vector processors such as the Earth Simulator. This method is based on a three-level hy...
IEEE Proceedings of 7th International Conference on High Performance Computing and Grid in Asia Pacific Region (HPC Asia 2004) 150-159 2004年7月 [査読有り]
Efficient parallel preconditioned iterative linear solvers for unstructured grid have been developed for symmetric multiprocessor (SMP) cluster architectures with vector processors such as the Earth Simulator. Three types of preconditioning, metho...
Li Chen, Issei Fujishiro, Issei Fujishiro, Kengo Nakajima
Proceedings of the Seventh IASTED International Conference on Computer Graphics and Imaging 242-247 2004年12月 [査読有り]
A new parallel volume rendering method for large unstructured data has been developed for the Earth Simulator. Concurrent visualization can be performed with numerical computation modules on the supercomputer. The supervoxel partition and voxel re...
Li Chen, Issei Fujishiro, Issei Fujishiro, Kengo Nakajima
Pure and Applied Geophysics 161 2245-2263 2004年12月 [査読有り]
A scalable and high-performance parallel visualization subsystem has been developed in GeoFEM for the Earth Simulator. As part of the Earth Simulator project in Japan, the proposed subsystem is effective for the visualization of large-scale geosci...
An efficient parallel iterative method for finite element method has been developed for symmetric multiprocessor (SMP) cluster architectures with vector processors such as the Earth Simulator. The method is based on a three-level hybrid parallel p...
観測・計算を融合した階層連結地震・津波災害予測システム」における大規模連成シミュレーションのために，SPMD環境におけるM×N通信に基づく，フレームワークのプロトタイプを開発した。FORTRANのモジュール，構造体の特性に基づき，連成シミュレーションに関連した処理をFORTRAN環境で実施することにより，簡明なインタフェースにより，M×N通信の機能を利用可能である。PCクラスタ上で地震波伝播，石油タンクスロッシング連成シミュレーションに適用した結果を紹介する。A prototype of ...
Lecture Notes in Computer Science, IEEE Third International Conference on High-Performance Computation Conference (HPCC-07) 4782 384-395 2007年9月 [査読有り]
Parallel Computing: From Multicores and GPU's to Petascale, Proceedings of the conference ParCo 2009, 1-4 September 2009, Lyon, France 99-106 2009年 [査読有り]
Advances in Geocomputing, Lecture Notes in Earth Sciences 119 65-118 2009年2月 [査読有り][招待有り]
Solving large-scale systems of linear equations [A]{x} = {b} is one of the most expensive and critical processes in scientific computing. In particular, for simulation codes based on the finite-element method (FEM), most of the computational time ...
3次元津波伝搬シミュレーションコードにおいて，海底の深さに起因するループの連続化を利用し，カーネルを最適化する方式を提案する．T2Kオープンスパコン(東大版)を利用した性能評価の結果，論理マスクを用いる従来方式に対し，ベンチマークコードで48%の高速化，MPI化された実コードで5.8%，および9.2%の速度向上を得た．In this presentation, we propose an optimization method to sequentialize the loop relat...
本稿では，数値計算ライブラリにおいて個々に開発された自動チューニング機能の実装を再利用するという AT 実装再利用性という概念を示す．AT 実装再利用性を達成する自動チューニングインターフェースが持つべき機能を示し，その機能の一部を実装したライブラリ OpenATLib のインターフェースについて紹介する．In this paper, reusability for implementation of automatic tuning facility (RIAT) for numeric...
IEEE Proceedings of the 38th International Conference on Parallel Processing (ICPP 2009) (Second International Workshop on Parallel Programming Models and Systems Software for High-End Computing (P2S2)) 73-80 2009年9月 [査読有り]
Conventional numerical libraries with auto-tuning (AT) facility have no re-usability for their AT functions. To solve the re-usability problem of AT libraries, we have established Application Programming Interfaces (APIs) for AT. The library of th...
In this study, framework for automatic tuning on selection of optimum parallel programming model in finite-element computation has been investigated. Target FEM code has been tested and optimized on T2K Open Supercomputers (Tokyo) with up to 1,024...
OpenMP/MPI ハイブリッド並列プログラミングモデルを，並列多重格子前処理付き反復法を使用した，三次元有限体積法に基づく不均質多孔質媒体中における地下水流れ問題シミュレーションに適用した．開発したプログラムの性能と安定性を T2K オープンスパコン （東大），Cray-XT4 の 1,024 コアまでを使用して評価した．First Touch Data Placement，連続メモリアクセスのためのデータ再配置，適切な NUMA control の組み合わせにより，OpenMP/MP...
Recent Advances in the Message Passing Interface - 19th European MPI Users' Group Meeting, EuroMPI 2012, Vienna, Austria, September 23-26, 2012. Proceedings 296-297 2012年 [査読有り]
Proceedings of the 2012 PPOPP International Workshop on Programming Models and Applications for Multicores and Manycores, PMAM 2012, New Orleans, LA, USA, February 26, 2012 93-102 2012年2月 [査読有り]
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 7851 LNCS 80-92 2013年9月
As one of the promising approaches for reducing greenhouse-gas content in the atmosphere, CCS (carbon dioxide capture and storage) has been recognized worldwide. CO2 is captured from large emission sources and injected and stored in deep reservoir...
In GeoFEM, iterative methods are adopted for solving large-scale sparse matrices in scientific computing using massively parallel computers. In this paper, distributed data structure and parallel processing in GeoFEM will be described. Moreover, r...
Chris Johnson, David Keyes, Ulrich Ruede, Gyan Bhanot, Rupak Biswas, Edmond Chow, Yuefan Deng, Lori Freitag Diachin, Omar Ghattas, Laurence Halpern, Robert Harrison, Bruce Hendrickson, Kirk Jordan, Tammy Kolda, Louis Komzsik, Ulrich Langer, Hans Petter Langtangen, Steven Lee, Kengo Nakajima, Aiichiro Nakano, Esmond G. Ng, Stefan Turek, Andy Wathen, Margaret Wright, David P. Young
Proceedings of the International Conference on Computational Science, ICCS 2011, Nanyang Technological University, Singapore, 1-3 June, 2011 1448-1449 2011年 [査読有り]
Euro-Par 2011 Parallel Processing - 17th International Conference, Euro-Par 2011, Bordeaux, France, August 29 - September 2, 2011, Proceedings, Part II 302 2011年 [査読有り]
Euro-Par 2011 Parallel Processing 17th International Conference, Euro-Par 2011 Bordeaux, France, August 29-September 2, 2011 Proceedings, Part II Introduction
Coulaud Olivier, Nakajima Kengo, Ng Esmond G., Vazquez Mariano
Olivier Coulaud, Kengo Nakajima, Esmond G. Ng, Mariano Vazquez
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 6853 LNCS 302 2011年9月
As demand in high-resolution and high-fidelity modeling and simulation increases, desktop computers or small clusters of processors have proven to be insufficient to carry out the calculations in many scientific, engineering, and industrial applic...
G. Antoniu, T. Boku, A. Buttari, C. Calvin, P. Codognet, M. Dayde, N. Emad, Y. Ishikawa, G. Joslin, S. Matsuoka, K. Nakajima, H. Nakashima, R. Namyst, S. Petiton, T. Sakurai, M. Sato
CSIT 2013 - 9th International Conference on Computer Science and Information Technologies, Revised Selected Papers 2013年1月
The Japanese-french FP3C (Framework and Programming for Post-Petascale Computing) Project ANR/JST-2010-JTIC-003 aims at studying the software technologies, languages and programming models on the road to exascale computing. The ability to efficien...
Andreas Alvermann, Achim Basermann, Hans-Joachim Bungartz, Christian Carbogno, Dominik Ernst, Holger Fehske, Yasunori Futamura, Martin Galgon, Georg Hager, Sarah Huber, Thomas Huckle, Akihiro Ida, Akira Imakura, Masatoshi Kawai, Simone Köcher, Moritz Kreutzer, Pavel Kus, Bruno Lang, Hermann Lederer, Valeriy Manin, Andreas Marek, Kengo Nakajima, Lydia Nemec, Karsten Reuter, Michael Rippl, Melven Röhrig-Zöllner, Tetsuya Sakurai, Matthias Scheffler, Christoph Scheurer, Faisal Shahzad, Danilo Simoes Brambila, Jonas Thies, Gerhard Wellein
2018年6月
We first briefly report on the status and recent achievements of the ELPA-AEO
(Eigenvalue Solvers for Petaflop Applications - Algorithmic Extensions and
Optimizations) and ESSEX II (Equipping Sparse Solvers for Exascale) projects.
In both collabor...
This paper describes our parallel visualization system for large unstructured datasets on the Earth Simulator. Parallel volume rendering is one of important methods in the system. Some strategies have been adopted to make it suitable for the Earth...
Solid Earth Simulation Using GeoFEM Platform on the Earth Simulator[招待有り]
NAKAJIMA, Kengo
SIAM Conference on Computational Science and Engineering (CSE03) 2003年2月
HPC Middleware (HPC-MW): Infrastructure for Scientific Applications on HPC Environments - Overview and Recent Progress[招待有り]
Nakajima, K., Okuda, H.
4th Workshop on ACTS Collection 2003年8月
HPC Middleware (HPC-MW) Infrastructure for Scientific Applications on HPC Environments[招待有り]
Nakajima, K. and Okuda
SIAM 11th Conference on Parallel Processing for Scientific Computing (PP04), MS 37: Portable Parallel Numerical Libraries for Various Types of Architectures 2004年2月
High-Performance Computing in Solid Earth Simulations: Benchmarks of FEM-type codes on IBM BlueGege/L (512-node prototype)[招待有り]
NAKAJIMA, Kengo
NERSC Scientific Computing Seminar, Lawrence Berkeley National Laboratory 2004年12月
The impact of parallel programming models on the performance of preconditioned iterative solvers for finite-element simulations[招待有り]
NAKAJIMA, Kengo
CSE Colloquia, The Pennsylvania State University 2006年2月
Parallel Multilevel Iterative Linear Solvers for Heterogeneous Field with Adaptive Mesh Refinement[招待有り]
NAKAJIMA, Kengo
SIAM 12th Conference on Parallel Processing for Scientific Computing (PP06), MS 30: Scalable Preconditioning with Incomplete Factors and Sparse Approximate Inverses 2006年2月
Scalability of GeoFEM on BG/L prototype[招待有り]
NAKAJIMA, Kengo
The 3rd BG/L Systems Software and Applications Workshop 2006年4月
Integrated Predictive Simulation System for Earthquake and Tsunami Disaster - Contributions from the HPC Community[招待有り]
NAKAJIMA, Kengo
2007 Workshop on Community Finite Element Models for Fault Systems and Tectonic Studies 2007年6月
Parallel Programming Models for Finite-Element Applications on SMP Cluster Architectures,[招待有り]
NAKAJIMA, Kengo
Fourth International Conference of Applied Mathematics and Computing 2007年8月
Hybrid vs. Flat MPI: Parallel Programming Models in Multi-core Era[招待有り]
NAKAJIMA, Kengo
Second Korea-Japan Workshop on Computational Engineering 2007年9月
Automatic selection of parameters in parallel preconditioners for ill-conditioned problems[招待有り]
NAKAJIMA, Kengo
SIAM 13th Conference on Parallel Processing for Scientific Computing (PP08), MS 25: Auto-tuning on Numerical Libraries and Advanced Computer Systems Part-II 2008年3月
Hybrid vs. Flat MPI ? : Experiences in Preconditioned Iterative Linear Solvers for Unstructured Grids[招待有り]
NAKAJIMA, Kengo
SIAM 13th Conference on Parallel Processing for Scientific Computing (PP08), MS 49: Algorithms and Optimizations Targeting Multi-Core Architectures Part-II 2008年3月
Strategy of Domain Partitioning for Parallel Preconditioned Iterative Solvers in the Multi-Core Era[招待有り]
NAKAJIMA, Kengo
5th GSIC International Symposium (Leading Studies on Computational Mechanics) 2008年12月
東京大学における全学的HPC教育の試み：学際計算科学・工学人材育成プログラム[招待有り]
中島 研吾
第7回HSS（Hokudai Simulation Salon）ワークショップ 2009年2月
Robust and Efficient Parallel Preconditioning Methods with Hierarchical Interface Decomposition for Multicore Architectures[招待有り]
NAKAJIMA, Kengo
SIAM Conference on Computational Science and Engineering (CSE09), MS115: Current Auto-tuning Challenges: Multicore Architecture and Crucial Algorithms Part-II 2009年3月
Optimization of Preconditioned Parallel Iterative Solvers for Finite-Element Applications using Hybrid Parallel Programming Models on “T2K Open Supercomputer (Tokyo)”[招待有り]
NAKAJIMA, Kengo
The 11th International Specialist Meeting on Next Generation Models on Climate Change and Sustainability for High Performance Computing Facilities 2009年3月
Infrastructure for Development of Codes in Scientific Computing on Post-Peta-Scale Systems[招待有り]
NAKAJIMA, Kengo
IPAB (Initiative for Parallel Bioinformatics) Open Workshop in Okinawa 2010: "Seeds and Needs for Large Scale Computing 2010" -Next Generation Sequencer : Uniting IT and Biotechnology - 2010年10月
Infrastructure for Application Development on Heterogeneous Parallel Computers,[招待有り]
NAKAJIMA, Kengo
Fujitsu Open Petascale Libraries Workshop at SC10 2010年11月
ppOpen-HPC: Open Source Infrastructure for Development and Execution of Large-Scale Scientific Applications on Post-Petascale Supercomputers with Automatic Tuning (AT)[招待有り]
NAKAJIMA, Kengo
International Workshop on Collaborative Development of Simulation Software of Next Generation (CO-DESIGN) 2011年10月
ppOpen-HPC: Open Source Infrastructure for Development and Execution of Large-Scale Scientific Applications on Post-Peta-Scale Supercomputers with Automatic Tuning (AT)
NAKAJIMA, Kengo
ATIP/A*CRC Workshop on Accelerator Technologies for High-Performance Computing: Does Asia Lead the Way? 2012年5月8日
Parallel Multigrid Methods on Post-Peta/Exascale Systems[招待有り]
NAKAJIMA, Kengo
The 6th Korea-Japan Workshop on Computational Mechanics 2012年5月31日
ppOpen-HPC: Open Source Infrastructure for Development and Execution of Large-Scale Scientific Applications on Post-Peta-Scale Supercomputers with Automatic Tuning (AT)[招待有り]
NAKAJIMA, Kengo
The First Spain-Japan Workshop on Computational Mechanics 2012年9月17日
Automatic Tuning of Preconditioned Iterative Solvers with Hybrid Parallel Programming Models[招待有り]
NAKAJIMA, Kengo
International Workshop on Collaborative Development of Simulation Software of Next Generation (CO-DESIGN) 2012年10月25日
ppOpen-HPC: Open Source Infrastructure for Development and Execution of Large-Scale Scientific Applications with Automatic Tuning (AT)[招待有り]
NAKAJIMA, Kengo
CUG Seminar (China University of Geosciences) 2012年10月26日
ppOpen-HPC: Open Source Infrastructure for Development and Execution of Large-Scale Scientific Applications with Automatic Tuning (AT)[招待有り]
NAKAJIMA, Kengo
SDSC Seminar, San Diego Supercomputer Center 2013年2月26日
HPCI towards Exascale Era[招待有り]
Nakajima, K., Y. Ishikawa and T. Katagiri
17th Workshop on Sustained Simulation Performance (WSSP 2013) 2013年3月12日
Automatic Tuning of Preconditioned Iterative Solvers with Hybrid Parallel Programming Models[招待有り]
NAKAJIMA, Kengo
Climate 2013 Workshop (The next-generation of climate models and knowledge discoveries through the extreme high-performance simulations and big data) 2013年3月21日
Parallel Multigrid Method on Post-Peta/Exa Scale Supercomputer Systems
NAKAJIMA, Kengo
Advances in Computational Mechanics (ACM 2013) — A Conference Celebrating the 70th Birthday of Thomas J.R. Hughes: Parallelism in Matrix Computations 2013年3月25日
Automatic Tuning of Parallel Multigrid Solvers with Hybrid Parallel Programming Models
NAKAJIMA, Kengo
Conference on Advanced Topics and Auto Tuning in High Performance Scientific Computing (2013@2HPSC) 2013年3月28日
Challenges in Extreme Engineering Algorithms, ISC High Performance 2016 2016年6月19日
Development of Large-Scale Scien-tific & Engineering Applications on Post-Peta/Exascale Systems using ppOpen-HPC[招待有り]
Kengo Nakajima, Akihiro Ida and Takahiro Katagiri
Enabling Technologies and Simulation Practices for High Performance Computational Mechanics, The 12th World Congress on Computational Mechanics (WCCM XII) 2016年7月24日
Parallel Iterative Solvers for Ill-conditioned Problems with Heterogeneous Material Properties[招待有り]
NAKAJIMA, Kengo
NCU Mathematics Seminar, National Central University 2016年11月3日
[6-67] Kengo Nakajima, Parallel Iterative Solvers with Preconditioning in the Post-Moore Era[招待有り]
NAKAJIMA, Kengo
TIMS Seminar on Scientific Computing, National Taiwan University 2016年11月14日
Communication/Synchronization Avoiding/Reducing in Krylov Iterative Solvers on Multicore/Manycore Clusters -Early Case Studies on Oakforest-PACS with Intel Xeon Phi[招待有り]
NAKAJIMA, Kengo
Berkeley Lab Computing Sciences Seminar (Lawrence Berkeley National Laboratory) 2017年1月20日
Accelerated Computing Activities at ITC/University of Tokyo[招待有り]
NAKAJIMA, Kengo
ADAC-3 (Accelerated Data Analytics and Computing) Workshop 2017年1月25日
Application Development Framework for Manycore Architectures in Exascale/Post-Moore Era
NAKAJIMA, Kengo
2017 SIAM Conference on Computational Science and Engineering (SIAM CSE17) 2017年3月3日
Hiding communications in preconditioned Krylov iterative solvers on multicore/manycore clusters
NAKAJIMA, Kengo
2017 Conference on Advanced Topics and Auto Tuning in High Performance Scientific Computing (2017 ATAT in HPSC) 2017年3月11日
