Umpei Nagashima

According to our database, Umpei Nagashima authored at least 32 papers between 1990 and 2011.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2011

Theoretical study of the reversible photoconversion mechanism in Dronpa.

Jun Koseki, Yukiumi Kita, Umpei Nagashima, Masanori Tachikawa

Proceedings of the International Conference on Computational Science, 2011

2010

Parallel Fock matrix construction with distributed shared memory model for the FMO-MO method.

Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Toru Yagi, Takayoshi Ishimoto, Tsutomu Ikegami, Hiroto Tadano, Tetsuya Sakurai, Umpei Nagashima

J. Comput. Chem., 2010

A filter diagonalization for generalized eigenvalue problems based on the Sakurai-Sugiura projection method.

Tsutomu Ikegami, Tetsuya Sakurai, Umpei Nagashima

J. Comput. Appl. Math., 2010

2009

Parallel Fock matrix construction program for molecular orbital calculation - Specific computer with a hierarchical network.

Hiroaki Umeda, Yuichi Inadomi, Hiroaki Honda, Umpei Nagashima

J. Comput. Chem., 2009

2008

A parallel method for large sparse generalized eigenvalue problems using a GridRPC system.

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroto Tadano, Daisuke Takahashi, Mitsuhisa Sato, Umpei Nagashima

Future Gener. Comput. Syst., 2008

2007

<i>De novo</i> peptide sequencing using ion peak intensity and amino acid cleavage intensity ratio.

Mitsuhiro Kanazawa, Hisae Anyoji, Atsushi Ogiwara, Umpei Nagashima

Bioinform., 2007

2006

A Master-Worker Type Eigensolver for Molecular Orbital Computations.

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroto Tadano, Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Umpei Nagashima

Proceedings of the Applied Parallel Computing. State of the Art in Scientific Computing, 2006

2005

Four-index integral transformation exploiting symmetry.

Shigeyoshi Yamamoto, Umpei Nagashima

Comput. Phys. Commun., 2005

A Hybrid Parallel Method for Large Sparse Eigenvalue Problems on a Grid Computing Environment Using Ninf-G/MPI.

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Umpei Nagashima

Proceedings of the Large-Scale Scientific Computing, 5th International Conference, 2005

2004

Improvement of parallelization performance of GAMESS: Global sum and (semi-)direct integral calculation in multireference perturbation calculation.

Hiroaki Umeda, Shiro Koseki, Umpei Nagashima

J. Comput. Chem., 2004

2003

Design and Implementation of Intelligent Scheduler for Gaussian Portal on Quantum Chemistry Grid.

Takeshi Nishikawa, Umpei Nagashima, Satoshi Sekiguchi

Proceedings of the Computational Science - ICCS 2003, 2003

2002

A novel parallel algorithm for large-scale Fock matrix construction with small locally distributed memory architectures: RT parallel algorithm.

Hajime Takashima, So Yamada, Shigeru Obara, Kunihiro Kitamura, Shinjiro Inabata, Nobuaki Miyakawa, Kazutoshi Tanabe, Umpei Nagashima

J. Comput. Chem., 2002

2001

Parallel molecular dynamics simulation of a protein.

Yuto Komeiji, Makoto Haraguchi, Umpei Nagashima

Parallel Comput., 2001

Parallelization of multireference perturbation calculations with GAMESS.

Hiroaki Umeda, Shiro Koseki, Umpei Nagashima, Michael W. Schmidt

J. Comput. Chem., 2001

Design and implementation of FMPL, a fast message-passing library for remote memory operations.

Osamu Tatebe, Umpei Nagashima, Satoshi Sekiguchi, Hisayoshi Kitabayashi, Yoshiyuki Hayashida

Proceedings of the 2001 ACM/IEEE conference on Supercomputing, 2001

Increased Efficiency of Parallel Calculations of Fragment Molecular Orbitals by Using Fine-Grained Parallelization on a HITACHI SR8000 Supercomputer.

Yuichi Inadomi, Tatsuya Nakano, Kazuo Kitaura, Umpei Nagashima

Proceedings of the High-Performance Computing and Networking, 9th International Conference, 2001

2000

Performance Evaluation Model for Scheduling in Global Computing Systems.

Kento Aida, Atsuko Takefusa, Hidemoto Nakada, Satoshi Matsuoka, Satoshi Sekiguchi, Umpei Nagashima

Int. J. High Perform. Comput. Appl., 2000

Collaboration of Parafrase-2 and NaraView for Effective Parallelization Supports.

Masayo Haneda, Mariko Sasakura, Umpei Nagashima, Yoshitoshi Kunieda, Kazuki Joe

Proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications, 2000

1999

Is large-scale ab initio Hartree-Fock calculation chemically accurate? Toward improved calculation of biological molecule properties.

Hajime Takashima, Kunihiro Kitamura, Kazutoshi Tanabe, Umpei Nagashima

J. Comput. Chem., 1999

MOE: A Special-Purpose Parallel Computer for High-Speed, Large-Scale Molecular Orbital Calculation.

Koji Hashimoto, Hiroto Tomita, Koji Inoue, Katsuhiko Metsugi, Kazuaki J. Murakami, Shinjiro Inabata, So Yamada, Nobuaki Miyakawa, Hajime Takashima, Kunihiro Kitamura, Shigeru Obara, Takashi Amisaki, Kazutoshi Tanabe, Umpei Nagashima

Proceedings of the ACM/IEEE Conference on Supercomputing, 1999

Overview of a Performance Evaluation System for Global Computing Scheduling Algorithms.

Atsuko Takefusa, Satoshi Matsuoka, Hidemoto Nakada, Kento Aida, Umpei Nagashima

Proceedings of the Eighth IEEE International Symposium on High Performance Distributed Computing, 1999

1998

Ninf and PM: Communication libraries for global computing and high-performance cluster computing.

Mitsuhisa Sato, Hiroshi Tezuka, Atsushi Hori, Yutaka Ishikawa, Satoshi Sekiguchi, Hidemoto Nakada, Satoshi Matsuoka, Umpei Nagashima

Future Gener. Comput. Syst., 1998

Ninflet: a migratable parallel objects framework using Java.

Hiromitsu Takagi, Satoshi Matsuoka, Hidemoto Nakada, Satoshi Sekiguchi, Mitsuhisa Sato, Umpei Nagashima

Concurr. Pract. Exp., 1998

A Performance Evaluation Model for Effective Job Scheduling in Global Computing Systems.

Kento Aida, Atsuko Takefusa, Hidemoto Nakada, Satoshi Matsuoka, Umpei Nagashima

Proceedings of the Seventh IEEE International Symposium on High Performance Distributed Computing, 1998

Utilizing the Metaserver Architecture in the Ninf Global Computing System.

Hidemoto Nakada, Hiromitsu Takagi, Satoshi Matsuoka, Umpei Nagashima, Mitsuhisa Sato, Satoshi Sekiguchi

Proceedings of the High-Performance Computing and Networking, 1998

1997

Performance Evaluation of a Workstation Cluster, TMC CM-5, and Intel Paragon/XP Using a Parallel Homology Analysis Program.

Satoko Sakata, Umpei Nagashima, Mitsuhisa Sato, Satoshi Sekiguchi, Haruo Hosoya

Parallel Comput., 1997

Multi-client LAN/WAN Performance Analysis of Ninf: a High-Performance Global Computing System.

Atsuko Takefusa, Satoshi Matsuoka, Hirotaka Ogawa, Hidemoto Nakada, Hiromitsu Takagi, Mitsuhisa Sato, Satoshi Sekiguchi, Umpei Nagashima

Proceedings of the ACM/IEEE Conference on Supercomputing, 1997

Ninf: A Network Based Information Library for Global World-Wide Computing Infrastructure.

Mitsuhisa Sato, Hidemoto Nakada, Satoshi Sekiguchi, Satoshi Matsuoka, Umpei Nagashima, Hiromitsu Takagi

Proceedings of the High-Performance Computing and Networking, 1997

1996

Development of Neural Network Simulator for Structure-Activity Correlation of Molecules (NECO). Prediction of Endo/Exo Substitution of Norbornane Derivatives and of Carcinogenic Activity of PAHs from 13C-NMR Shifts.

Yoshimi Isu, Umpei Nagashima, Tomoo Aoyama, Haruo Hosoya

J. Chem. Inf. Comput. Sci., 1996

1995

An Experience with Super-Linear Speedup Achieved by Parallel Computing on a Workstation Cluster: Parallel Calculation of Density of States of Large Scale Cyclic Polyacenes.

Umpei Nagashima, Sachiko Hyugaji, Satoshi Sekiguchi, Mitsuhisa Sato, Haruo Hosoya

Parallel Comput., 1995

1994

Topological Twin Graphs. Smallest Pair of Isospectral Polyhedral Graphs with Eight Vertices.

Haruo Hosoya, Umpei Nagashima, Sachiko Hyugaji

J. Chem. Inf. Comput. Sci., 1994

1990

An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing.

Umpei Nagashima, Fumio Nishimoto, Takashi Shibata, Hiroshi Itoh, Minoru Gotoh

Proceedings of the 4th international conference on Supercomputing, 1990