Umpei Nagashima

Jun Koseki, Yukiumi Kita, Umpei Nagashima, Masanori Tachikawa: Theoretical study of the reversible photoconversion mechanism in Dronpa. Procedia CS 4: 251-260 (2011)

Tsutomu Ikegami, Tetsuya Sakurai, Umpei Nagashima: A filter diagonalization for generalized eigenvalue problems based on the Sakurai-Sugiura projection method. J. Computational Applied Mathematics 233(8): 1927-1936 (2010)

Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Toru Yagi, Takayoshi Ishimoto, Tsutomu Ikegami, Hiroto Tadano, Tetsuya Sakurai, Umpei Nagashima: Parallel Fock matrix construction with distributed shared memory model for the FMO-MO method. Journal of Computational Chemistry 31(13): 2381-2388 (2010)

Hiroaki Umeda, Yuichi Inadomi, Hiroaki Honda, Umpei Nagashima: Parallel Fock matrix construction program for molecular orbital calculation - Specific computer with a hierarchical network. Journal of Computational Chemistry 30(5): 826-831 (2009)

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroto Tadano, Daisuke Takahashi, Mitsuhisa Sato, Umpei Nagashima: A parallel method for large sparse generalized eigenvalue problems using a GridRPC system. Future Generation Comp. Syst. 24(6): 613-619 (2008)

Mitsuhiro Kanazawa, Hisae Anyoji, Atsushi Ogiwara, Umpei Nagashima: De novo peptide sequencing using ion peak intensity and amino acid cleavage intensity ratio. Bioinformatics 23(9): 1068-1072 (2007)

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroto Tadano, Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Umpei Nagashima: A Master-Worker Type Eigensolver for Molecular Orbital Computations. PARA 2006: 617-625

Shigeyoshi Yamamoto, Umpei Nagashima: Four-index integral transformation exploiting symmetry. Computer Physics Communications 166(1): 58-65 (2005)

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroaki Umeda, Yuichi Inadomi, Toshio Watanabe, Umpei Nagashima: A Hybrid Parallel Method for Large Sparse Eigenvalue Problems on a Grid Computing Environment Using Ninf-G/MPI. LSSC 2005: 438-445

Hiroaki Umeda, Shiro Koseki, Umpei Nagashima: Improvement of parallelization performance of GAMESS: Global sum and (semi-)direct integral calculation in multireference perturbation calculation. Journal of Computational Chemistry 25(9): 1175-1183 (2004)

Takeshi Nishikawa, Umpei Nagashima, Satoshi Sekiguchi: Design and Implementation of Intelligent Scheduler for Gaussian Portal on Quantum Chemistry Grid. International Conference on Computational Science 2003: 244-253

Hajime Takashima, So Yamada, Shigeru Obara, Kunihiro Kitamura, Shinjiro Inabata, Nobuaki Miyakawa, Kazutoshi Tanabe, Umpei Nagashima: A novel parallel algorithm for large-scale Fock matrix construction with small locally distributed memory architectures: RT parallel algorithm. Journal of Computational Chemistry 23(14): 1337-1346 (2002)

Hiroaki Umeda, Shiro Koseki, Umpei Nagashima, Michael W. Schmidt: Parallelization of multireference perturbation calculations with GAMESS. Journal of Computational Chemistry 22(12): 1243-1251 (2001)

Yuto Komeiji, Makoto Haraguchi, Umpei Nagashima: Parallel molecular dynamics simulation of a protein. Parallel Computing 27(8): 977-987 (2001)

Yuichi Inadomi, Tatsuya Nakano, Kazuo Kitaura, Umpei Nagashima: Increased Efficiency of Parallel Calculations of Fragment Molecular Orbitals by Using Fine-Grained Parallelization on a HITACHI SR8000 Supercomputer. HPCN Europe 2001: 569-572

Osamu Tatebe, Umpei Nagashima, Satoshi Sekiguchi, Hisayoshi Kitabayashi, Yoshiyuki Hayashida: Design and implementation of FMPL, a fast message-passing library for remote memory operations. SC 2001: 15

Masayo Haneda, Mariko Sasakura, Umpei Nagashima, Yoshitoshi Kunieda, Kazuki Joe: Collaboration of Parafrase-2 and NaraView for Effective Parallelization Supports. PDPTA 2000

Hajime Takashima, Kunihiro Kitamura, Kazutoshi Tanabe, Umpei Nagashima: Is large-scale ab initio Hartree-Fock calculation chemically accurate? Toward improved calculation of biological molecule properties. Journal of Computational Chemistry 20(4): 443-454 (1999)

Atsuko Takefusa, Satoshi Matsuoka, Hidemoto Nakada, Kento Aida, Umpei Nagashima: Overview of a Performance Evaluation System for Global Computing Scheduling Algorithms. HPDC 1999

Koji Hashimoto, Hiroto Tomita, Koji Inoue, Katsuhiko Metsugi, Kazuaki Murakami, Shinjiro Inabata, So Yamada, Nobuaki Miyakawa, Hajime Takashima, Kunihiro Kitamura, Shigeru Obara, Takashi Amisaki, Kazutoshi Tanabe, Umpei Nagashima: MOE: A Special-Purpose Parallel Computer for High-Speed, Large-Scale Molecular Orbital Calculation. SC 1999: 58

Hiromitsu Takagi, Satoshi Matsuoka, Hidemoto Nakada, Satoshi Sekiguchi, Mitsuhisa Sato, Umpei Nagashima: Ninflet: a migratable parallel objects framework using Java. Concurrency - Practice and Experience 10(11-13): 1063-1078 (1998)

Hidemoto Nakada, Hiromitsu Takagi, Satoshi Matsuoka, Umpei Nagashima, Mitsuhisa Sato, Satoshi Sekiguchi: Utilizing the Metaserver Architecture in the Ninf Global Computing System. HPCN Europe 1998: 607-616

Kento Aida, Atsuko Takefusa, Hidemoto Nakada, Satoshi Matsuoka, Umpei Nagashima: A Performance Evaluation Model for Effective Job Scheduling in Global Computing Systems. HPDC 1998: 352-353

Satoko Sakata, Umpei Nagashima, Mitsuhisa Sato, Satoshi Sekiguchi, Haruo Hosoya: Performance Evaluation of a Workstation Cluster, TMC CM-5, and Intel Paragon/XP Using a Parallel Homology Analysis Program. Parallel Computing 22(12): 1677-1693 (1997)

Mitsuhisa Sato, Hidemoto Nakada, Satoshi Sekiguchi, Satoshi Matsuoka, Umpei Nagashima, Hiromitsu Takagi: Ninf: A Network Based Information Library for Global World-Wide Computing Infrastructure. HPCN Europe 1997: 491-502

Atsuko Takefusa, Satoshi Matsuoka, Hirotaka Ogawa, Hidemoto Nakada, Hiromitsu Takagi, Mitsuhisa Sato, Satoshi Sekiguchi, Umpei Nagashima: Multi-client LAN/WAN Performance Analysis of Ninf: a High-Performance Global Computing System. SC 1997: 22

Yoshimi Isu, Umpei Nagashima, Tomoo Aoyama, Haruo Hosoya: 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. Journal of Chemical Information and Computer Sciences 36(2): 286-293 (1996)

Umpei Nagashima, Sachiko Hyugaji, Satoshi Sekiguchi, Mitsuhisa Sato, Haruo Hosoya: 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. Parallel Computing 21(9): 1491-1504 (1995)

Haruo Hosoya, Umpei Nagashima, Sachiko Hyugaji: Topological Twin Graphs. Smallest Pair of Isospectral Polyhedral Graphs with Eight Vertices. Journal of Chemical Information and Computer Sciences 34(2): 428-431 (1994)

Umpei Nagashima, Fumio Nishimoto, Takashi Shibata, Hiroshi Itoh, Minoru Gotoh: An improvement of I/O function for auxiliary storage: parallel I/O for a large scale supercomputing. ICS 1990: 48-59