An apparatus includes a processing system configured to establish a link with any one of a plurality of access points in a mesh network, each of the access points providing the apparatus with a different data path through the mesh network. The semiconductor device includes a cell array including a control bit line connected to cells and electrically isolated from a bit line, and a floating body control circuit for applying a floating control voltage to the control bit line in a predetermined period. Air enters from the front of the vehicle body and flows like eddy currents from outlet ports of the widening passages to the outlet ports of the narrowing passages like eddy currents.