Aging or damaged skin is treated by irradiating affected skin areas with an effective amount of visible light emanating from an optical apparatus and having a wavelength of about 400 nm to about 500 nm. The ring magnets are adhesively secured and optionally captured on a ring support member to provide dependable operation in vehicle wheel speed sensing and other applications. The meeting is confirmed at the meeting time responsive to receiving acceptances from a predetermined subset of the invitees, such as a set of invitees identified as being critical invitees or a number of invitees constituting a quorum, and is rescheduled or cancelled responsive to a failure to receive acceptances from the predetermined subset of the invitees. Even if the user data should coincidentally contain the predefined bit pattern, the synchronization circuit will not be able to be simulated, since this false bit pattern is provided with a different error protection code. The optical transceiver can include CFP and variants thereof, OIF-MSA-100GLH-EM-01. An error correction code circuit of a solid state drive performs first error correction on read data using a first error correction code, and further performs second error correction on the result of the first error correction using a second error correction code.