The power transmission device comprises: a rotatable rotary part to which a rotary driving force is transmitted from a driving source; and a power transmission shut-off member for preventing an excessive torque from being transmitted between the rotatable rotary part and a rotating shaft of a driven apparatus and threadedly coupled to the rotating shaft. Increased heparin-binding ability is achieved by addition, insertion, andor substitution of an amino acid sequence X1X2X3X4X5X6. The device further includes an error checking and correction circuit which checks and corrects an error of data, which is read out of the memory cell by the sense amplifier, through the bit line. Each RF control module that successfully receives the broadcast SOC control command, performs actions to control operation of the module’s associated streetlight, and transmits a confirmation message to the module’s serving BS indicating the SOC command was received. The game randomly chooses one of the awards from each of the award sets and displays the chosen awards. The main advantage of this method lies in enabling metabolic engineering through the culture media composition manipulation, wherein an arbitrarily high number of cell functions are optimized through manipulation of medium factors, as opposed to previous methods, which are eminently empirical, are not cell function oriented, and require a much higher number of experiments.