An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing. - Umpei Nagashima; Fumio Nishimoto; Takashi Shibata 005; Hiroshi Itoh; Minoru Gotoh (ICS, 1990)

Topological Twin Graphs. Smallest Pair of Isospectral Polyhedral Graphs with Eight Vertices. - Haruo Hosoya; Umpei Nagashima; Sachiko Hyugaji (J. Chem. Inf. Comput. Sci., 1994)

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)

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)

Ninf: A Network Based Information Library for Global World-Wide Computing Infrastructure. - Mitsuhisa Sato; Hidemoto Nakada; Satoshi Sekiguchi; Satoshi Matsuoka; Umpei Nagashima; Hiromitsu Takagi (HPCN Europe, 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 (SC, 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)

Utilizing the Metaserver Architecture in the Ninf Global Computing System. - Hidemoto Nakada; Hiromitsu Takagi; Satoshi Matsuoka; Umpei Nagashima; Mitsuhisa Sato; Satoshi Sekiguchi (HPCN Europe, 1998)

A Performance Evaluation Model for Effective Job Scheduling in Global Computing Systems. - Kento Aida; Atsuko Takefusa; Hidemoto Nakada; Satoshi Matsuoka; Umpei Nagashima (HPDC, 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)

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)

Overview of a Performance Evaluation System for Global Computing Scheduling Algorithms. - Atsuko Takefusa; Satoshi Matsuoka; Hidemoto Nakada; Kento Aida; Umpei Nagashima (HPDC, 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; et al. (SC, 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)

Collaboration of Parafrase-2 and NaraView for Effective Parallelization Supports. - Masayo Haneda; Mariko Sasakura; Umpei Nagashima; Yoshitoshi Kunieda; Kazuki Joe (PDPTA, 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)

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 (HPCN Europe, 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 (SC, 2001)

Parallelization of multireference perturbation calculations with GAMESS. - Hiroaki Umeda; Shiro Koseki; Umpei Nagashima; Michael W. Schmidt (J. Comput. Chem., 2001)

Parallel molecular dynamics simulation of a protein. - Yuto Komeiji; Makoto Haraguchi; Umpei Nagashima (Parallel Comput., 2001)

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)

Design and Implementation of Intelligent Scheduler for Gaussian Portal on Quantum Chemistry Grid. - Takeshi Nishikawa; Umpei Nagashima; Satoshi Sekiguchi (International Conference on Computational Science, 2003)

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)

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 (LSSC, 2005)

Four-index integral transformation exploiting symmetry. - Shigeyoshi Yamamoto; Umpei Nagashima (Comput. Phys. Commun., 2005)

A Master-Worker Type Eigensolver for Molecular Orbital Computations. - Tetsuya Sakurai; Yoshihisa Kodaki; Hiroto Tadano; Hiroaki Umeda; Yuichi Inadomi; Toshio Watanabe; Umpei Nagashima (PARA, 2006)

De novo peptide sequencing using ion peak intensity and amino acid cleavage intensity ratio. - Mitsuhiro Kanazawa; Hisae Anyoji; Atsushi Ogiwara; Umpei Nagashima (Bioinform., 2007)

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)

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)

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)

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)

Theoretical study of the reversible photoconversion mechanism in Dronpa. - Jun Koseki; Yukiumi Kita; Umpei Nagashima; Masanori Tachikawa (ICCS, 2011)