Cilia-like micro surface actuators are applied to fins of a heat sink to improve heat dissipation. The memory cells that share one of word lines and can be written or read at a time are configured to store multiple pages of data therein. When irradiated with active rays focused on the optically nonlinear layer, a fine optical window or light scattering point is formed therein where a near-field light is generated to pattern-wise expose the photoresist layer. Accordingly, the performance characteristic of each gene may be updated and varied with each periodically received data. A ball seat is fixed to the locking frame plate. The stress sensor permits measurement of stress, preferably a shear component of the stress substantially exclusive of the normal component.