The present invention provides CD-RW which makes high velocity recording at a level of at least 24-times velocity possible, rewritable DVD which makes high velocity recording at a level of at least 6-times velocity possible, and a recording method therefor, while maintaining interchangeability with conventional CD-RW standards and rewritable DVD standards. The method can include obtaining a preload-frequency relation and a force-frequency relation from histogram data for a patient condition and determining an optimal pacing heart rate for the patient condition. The JPEG file including the textual material can be transferred to an authorized user who could edit the file based upon password security. The reservoir has tubing extending from the reservoir for transporting the material to a brush. The HBC will be a small, inexpensive to manufacture, and lightweight optical element.