Proposal of adaptive land classification using quaternion neural network with isotropic activation function. - Kazutaka Kinugawa; Fang Shang; Naoto Usami; Akira Hirose 001 (IGARSS, 2016)

Proposal of wet snowmapping with focus on incident angle influential to depolarization of surface scattering. - Naoto Usami; Arnab Muhuri; Avik Bhattacharya; Akira Hirose 001 (IGARSS, 2016)

PolSAR Wet Snow Mapping With Incidence Angle Information. - Naoto Usami; Arnab Muhuri; Avik Bhattacharya; Akira Hirose 001 (IEEE Geosci. Remote. Sens. Lett., 2016)

T-Shaped Probe Waveguide Antenna: A Wideband Reconfigurable Circular-Polarized Single-Port Antenna. - Naoto Usami; Akira Hirose 001 (IEICE Trans. Electron., 2017)

Isotropization of Quaternion-Neural-Network-Based PolSAR Adaptive Land Classification in Poincare-Sphere Parameter Space. - Kazutaka Kinugawa; Fang Shang; Naoto Usami; Akira Hirose 001 (IEEE Geosci. Remote. Sens. Lett., 2018)

Toward Wirelessly Cooperated Shape-Changing Computing Particles. - Junichiro Kadomoto; Takuya Sasatani; Koya Narumi; Naoto Usami; Hidetsugu Irie; Shuichi Sakai; Yoshihiro Kawahara (IEEE Pervasive Comput., 2021)

Quaternion Neural Networks: A physics-incorporated intelligence framework [Hypercomplex Signal and Image Processing]. - Akira Hirose 001; Fang Shang; Yuta Otsuka; Ryo Natsuaki; Yuya Matsumoto; Naoto Usami; Yicheng Song; Haotian Chen (IEEE Signal Process. Mag., 2024)

Design of a 7.2-GHz CMOS Receiver Front-end for One-chip Transponders in Deep Space Probes. - Sota Kano; Naoto Usami; Atsushi Tomiki; Tetsuya Iizuka (ASP-DAC, 2025)

Design of Wheel Grouser Geometry With Reduced Sinkage for LEV-1 Lunar Rover. - Masatsugu Otsuki; Kent Yoshikawa; Takao Maeda; Naoto Usami; Tetsuo Yoshimitsu (IEEE Robotics Autom. Lett., 2025)