Embodiments are directed to processing a pre-set readable indicia associated with a user. At least one of boundaries between the dielectric layers is formed to have a predetermined surface roughness to obtain a desired target reflectance of the dielectric multilayer mirror. The advancing system may include a guiding device configured to advance a medical device beyond a distal portion of the endoscope to a selected target anatomy. The conveyor device comprises at least one means for generating a spatially andor temporally altering magnetic field, which produces a force to rotate or stop the spindle-shaped elements. Further, the contents of a new message may be described by how they differ from the contents of a previous message. In response to the record, the method further consists of making a determination whether data accessed by the host in the original configuration during the evaluation period would have been unavailable to the host if the proposed reconfiguration had been implemented prior to the evaluation period.