About HONGO Kazutaka
About Kitakyushu Coll. Technol., Kitakyushu, JPN
About HAYASHI Kentarou
About Shingo Denzai Co., Ltd., Fukuoka, JPN
About AKINAGA Yoshinori
About Shingo Denzai Co., Ltd., Fukuoka, JPN
About KOUROGI Masahiro
About Shingo Denzai Co., Ltd., Fukuoka, JPN
About MIYAUCHI Makoto
About Kitakyushu Coll. Technol., Kitakyushu, JPN
About SERIKAWA Seiichi
About Kyushu Inst. Technol., Kitakyushu, JPN
About Information (Koganei)
About traffic control signal
About visibility
About road traffic
About light emitting diode
About filament
About incandescent lamp
About effect
About washout
About structural design
About luminance
About homogeneity
About light source
About improvement
About man-machine system
About light emitting diode
About illumination effect
About Facilities attached to roads
About 道路交通
About 可視度
About 研究