Three-Dimensional Electromagnetic Particle-in-Cell Code Using High Performance Fortran on PC Cluster. - DongSheng Cai; Yaoting Li; Ken-ichi Nishikawa; Chiejie Xiao; Xiaoyan Yan (ISHPC, 2002)

Composing user network operation services using Web service composition techniques. - Nobuhide Nishiyama; Kenichi Nishikawa; Fumihiko Ito; Yasuhiro Suzuki (CCNC, 2005)

Knowledge base design for network service composition using semantic web languages. - Nobuhide Nishiyama; Kenichi Nishikawa; Yoshihiro Nakamura; Fumihiko Ito (CCNC, 2006)

Individual Knowledge Generation for Individual User Environments by Relating User Network Ontology to Local Protocols. - Kenichi Nishikawa; Nobuhide Nishiyama; Fumihiko Ito; Tetsuya Yamamura (DEXA Workshops, 2006)

Scalability analysis of parallel Particle-In-Cell codes on computational grids. - WeiFeng Tao; DongSheng Cai; Xiaoyang Yan; Ken-ichi Nishikawa; Bertrand Lembege (Comput. Phys. Commun., 2008)

A new position detection method using leaky coaxial cable. - Ken-ichi Nishikawa; Takeshi Higashino; Katsutoshi Tsukamoto; Shozo Komaki (IEICE Electron. Express, 2008)

Two dimensional position detection method using bi-directional leaky coaxial cable based on TDOA. - Ken-ichi Nishikawa; Takeshi Higashino; Katsutoshi Tsukamoto; Shozo Komaki (PIMRC, 2009)

A method for incorporating the Kerr-Schild metric in electromagnetic particle-in-cell code. - Michael Watson; Ken-ichi Nishikawa (Comput. Phys. Commun., 2010)

A state recognition method based on screen images toward advanced integrated operation management support. - Kenichi Nishikawa; Takeshi Masuda; Yousuke Ohno; Yukio Akiyama (Integrated Network Management, 2011)

An image-based annotation technique to overlay users' knowledge on existing systems. - Yuto Kawabata; Kenichi Nishikawa; Takeshi Masuda; Ikuya Takahashi (APNOMS, 2012)

Robust beamforming method for SDMA with interleaved subarray hybrid beamforming. - Shunsuke Fujio; Chikara Kojima; Toshihiro Shimura; Ken-ichi Nishikawa; Kazuyuki Ozaki; Zhengyi Li 001; Atsushi Honda; Shohei Ishikawa; Takenori Ohshima; Hiroshi Ashida; Masahiko Shimizu; Yoji Ohashi (PIMRC, 2016)

System validation of millimeter-wave beam multiplexing with interleaved hybrid beam-forming antennas. - Atsushi Honda; Shohei Ishikawa; Kazuyuki Ozaki; Shunsuke Fujio; Ken-ichi Nishikawa; Zhengyi Li 001; Chikara Kojima; Toshihiro Shimura; Hiroshi Ashida; Takenori Ohshima; Masahiko Shimizu; Yoji Ohashi (PIMRC, 2016)

Millimeter-wave beam multiplexing method using hybrid beamforming. - Masahiko Shimizu; Atsushi Honda; Shohei Ishikawa; Kazuyuki Ozaki; Shunsuke Fujio; Ken-ichi Nishikawa; Zhengyi Li 001; Chikara Kojima; Toshihiro Shimura; Hiroshi Ashida; Takenori Ohshima; Yoji Ohashi; et al. (PIMRC, 2016)

Efficient Particle-Grid Space Interpolation of an FPGA-Accelerated Particle-in-Cell Plasma Simulation. - Abedalmuhdi Almomany; B. Earl Wells; Ken-ichi Nishikawa (FCCM, 2017)

Novel two-step beam search method for multi user millimeter-wave communication. - Chikara Kojima; Shunsuke Fujio; Kenichi Nishikawa; Kazuyuki Ozaki; Zhengyi Li 001; Atsushi Honda; Shohei Ishikawa; Takenori Ohshima; Hiroshi Ashida; Toshihiro Shimura; Masahiko Shimizu; Yoji Ohashi (PIMRC, 2017)

Multi-user mmWave communication by interleaved beamforming with inter-subarray coding. - Zhengyi Li 001; Atsushi Honda; Toshihiro Shimura; Kazuyuki Ozaki; Shohei Ishikawa; Chikara Kojima; Shunsuke Fujio; Ken-ichi Nishikawa; Hiroshi Ashida; Takenori Ohshima; Masahiko Shimizu; Yoji Ohashi (PIMRC, 2017)

Study on Improvement of Handover in Relay Communication Systems using UAV. - Kazuyuki Ozaki; Shunsuke Fujio; Kenichi Nishikawa (ICOIN, 2025)