A fabrication method reduces minimum waveguide spacing in an integrated optical device. A method of generating electrical energy on a person includes wearing clothing with an integrated electroactive material that produces electrical charges upon movement of the person and harvesting electrical energy from the electroactive material for use with an electrical load. If the component completes its instructions so that it can terminate normally, it pops the stack, which removes its ID from the stack. To classify a target image, the classification system identifies the classified images of the collection that are most similar to the target image based on similarity between salient points of the target image and the classified images. To ensure that the marking of the film withstands any subsequent process steps, such as sterilization of the packaging, and is visually appealing, it is envisaged that the plastic film material be removed andor visibly changed in structure by laser. The device enables the bracelet to be changed easily without tools.