Abstract: In a binding for a snowboard according to the invention, one band having one end mounted on the one-side rising portion of a base plate is connected to the other end of the other band having one end mounted on the other-side rising using a connecting member. A means for mounting the bands onto the rising portion is composed of a hole formed in the bands, a plurality of holes each having a hook groove respectively formed in the rising portion, a pin including a projection to be inserted into the hook groove, a lever disposed on the pin for rotating the pin, and an arc-shaped groove formed in a desired depth portion of each of the plurality of holes with a hook groove coaxially with the same hole and in communication with the hook groove.

Abstract: A method and an optical device for bistable storage of optical information, together with reading and erasure of the optical information, using a photoactivated shift in a field dependent phase transition between a metastable or a bias-stabilized ferroelectric (FE) phase and a stable antiferroelectric (AFE) phase in an lead lanthanum zirconate titanate (PLZT). An optical disk contains the PLZT. Writing and erasing of optical information can be accomplished by a light beam normal to the disk. Reading of optical information can be accomplished by a light beam at an incidence angle of 15 to 60 degrees to the normal of the disk.