Abstract: A control apparatus that controls a plurality of vehicles performing platoon travelling is provided. Each of the vehicles is provided with an inter-vehicle communication apparatus that performs an inter-vehicle communication with an other vehicle included in a column of the platoon travelling. At least some of the vehicles is provided with an external communication apparatus that performs an external communication based on own identification information given by a telecommunication company. The control apparatus is configured to control respective vehicles such that the number of vehicles capable of simultaneously performing the external communication is less than the number of vehicles included in the column.

Abstract: A control apparatus that controls a plurality of vehicles performing platoon travelling is provided. Each of the vehicles is provided with an inter-vehicle communication apparatus that performs an inter-vehicle communication with an other vehicle included in a column of the platoon travelling. At least some of the vehicles is provided with an external communication apparatus that performs an external communication based on own identification information given by a telecommunication company. The control apparatus is configured to control respective vehicles such that the number of vehicles capable of simultaneously performing the external communication is less than the number of vehicles included in the column.

Abstract: A rotary blade has a rotary substrate with chips disposed about the outer edge of the substrate. The substrate further has two sets of semicircular slits. The first set of semicircular slits is disposed annularly about the rotary substrate on a circle coaxial with the center of rotation of the rotary blade. The semicircular slits open toward the center of rotation. The second set of semicircular slits are disposed on a circle inside of the circle of first slits. These slits open outwardly, thus blocking, at least partially, the first semicircular slits from the center of rotation. A filler material is filled into the semicircular slits, the slits thus providing a vibration damping effect. The chips may be attached to the outer edge of the rotary substrate by concave profiled cassette stands.