The present invention is directed to an object having an aero-or hydrodynamically active surface, wherein one or more biocatalytic andor anti-icing proteins are immobilized on its surface. A data transmission area including a non-collision area capable of exclusively using a wireless medium and a collision area where random access communication is carried out is set in a data transmission frame. The second converter generates a second power voltage based on the input power voltage, and outputs the second power voltage to a second output terminal. Using disclosed techniques, content placement is more predictable and consistent, and related content can be grouped together when rendered even though that content is not simultaneously rendered. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size of the final image. The HS die and the LS die are bonded together such that the source bonding pad of the HS die is electrically connected to the back side of the LS die, and each of the drain and gate bonding pads are electrically connected to separate TSVs in the LS die.