%0 Journal Article %T The improvement of ultrasonic sensor-based device for direct ocean wave measurement program at Western Java Sea – Indonesia %A Adrianto, D %A Djatmiko, E B %A Suntoyo, %J IOP Conference Series: Earth and Environmental Science %V 389 %N 1 %P 11 %@ 1755-1307 %D 2019-11-01 %~ DeepDyve