A camera is provided with an imaging element, and detects a timing of blinking of light which blinks periodically at a reference timing, based on a timing of variation in luminance of an image obtained by the imaging element, wherein the image is taken by the imaging element under a condition that the light blinks periodically at the reference timing. In one embodiment, a valve includes a hollow body with an inlet and an outlet along a common axis of the hollow body. The section designates whether or not a stencil printing process is performed for plural printing information including common printing data. The lid plate seals the vibrator. The template helps to control the presentation of chronological data in a synchronized fashion by reformatting the chronological data into a translated display format, thereby providing to the user a personalized time display. The compounds of the invention are of use in both therapeutic and diagnostic methods.