A method, apparatus, andor system for monitoring a user and transmitting an emergency notification is disclosed. The micro relief element comprises a first layer of a first substrate and a second layer of a relief forming polymer comprising an overlay and at least one relief feature portion. Thus, each 8-bit pixel byte is subtracted from its predecessor. In order to write out this data from within the trap routine, a desired target address is specified as a negative offset from the zero value stored in the register. The algorithm provides for a selective early exit and enables selecting a suitable search area with N candidate points for starting the search. Apertures are located in the side of the tubular pipe member adjacent the light source, and a socket for electrically connecting said light source to an external power source such as a rechargeable battery pack is preferably mounted in the handle of the device.