Disclosed herein is a Moire-free color halftone configuration for clustered dots. The system and method may comprise a pairing procedure to determine the suitability of a mobile device being an HMD according to criteria such as battery power, memory availability and whether the device is also out of coverage. The fairing having a U-shaped cylindrical shell with opposing edges defining a longitudinal gap and parallel fins extending outwardly from the opposing edges of the shell, the parallel fins being positioned so as to reduce vortex-induced vibration, minimize drag and to eliminate the galloping phenomenon on the cylindrical element. When electric power shortage occurs, the management server generates a start command and a power generation command for the vehicles based on the information concerning the vehicles to output the generated commands to the vehicles. A threshold voltage of the high-voltage thin film transistor of a first conductivity type is adjusted to be lower than a threshold voltage of the low-voltage thin film transistor of the same first conductivity type when the first gate insulating film and the second gate insulating film are assumed to be identical to each other. The use of an underfill after attachment of the flex circuit eliminates the need for the patterned removal of an interstitial material from the tops of the piezoelectric elements, and removes the requirement for a patterned standoff layer.