Underground Positioning: Subway Information System Using WiFi Location Technology. - Nobuo Kawaguchi; Motoki Yano; Shogo Ishida; Takeshi Sasaki; Yohei Iwasaki; Kenji Sugiki; Shigeki Matsubara (Mobile Data Management, 2009)

Compact Inductor-less CMOS PAM4 VCSEL Driver for High-speed Optical Communications. - Junsei Oshika; Shogo Ishida; Daisuke Ito; Makoto Nakamura (ISOCC, 2024)