According to the invention, there is provided seed and plants of the corn variety designated I156024. The body can include an opposed pair of longitudinally extending inward protrusions forming a graspable handle dividing the body into a front label surface occupying at least 180\xb0 of the body and a back label surface smaller than the front label surface. The generating unit generates an optimal elemental image by determining a value of at least one pixel from a weighted sum of values of at least two pixels of a generated image or an input image, and weights calculated based on light ray distributions indicating directions and scattering degrees of light rays from the light ray control elements. Additional memory cells can be created along rows and columns to form a memory matrix. The fastener parts are hook-hook type plastic extrusions, and provide a snap-engagement.