The present invention is in the field of genetics, especially plant genetics, and provides agents capable of controlling gene expression. The converter includes control means for amending the ratio of sampling frequencies of the DA input signal and the DA output signal or of the low pass filter. Each sticker has an adhering layer for adhesive attachment to the guitar pick and a highly-plasticized formulation of material for adhering the guitar pick to a glossy surface of a guitar without adhesive. A monthly electric fault density of the prediction target product is obtained by multiplying the monthly electric fault density of the reference product by the ratio of the average fault ratios. The rotating machine is supplied with electric power to rotate the rotating shaft, or the number of rotations of the rotating shaft is kept constant by controlling a transmission ratio of the continuously variable transmission.