A therapeutic member for use in brachytherapy deliverable to an implant site by way of a needle comprises a single radioactive source encapsulated by a bio-absorbable material having an outer surface including one or more ribs encircling the single radioactive source, a leading edge endcap rib and a trailing edge endcap rib. The motor component, if employed, assists in forward propulsion of the bicycle and the control system, when providing a control input for the motor increases drive power applied by the motor to the bicycle. A CA code generator 30 is provided at the L2-P code receiving channel side in addition to a carrier tracking circuit 24, code tracking circuit 26 and P code generator 28, whereby the code generator 30 is changed and connected to the tracking circuit 26 by a switching means 32 when carrying out the search mode during a cold start. Identifying information in the metamorphic installation program is substantially disguised from the malicious code so the program is substantially unrecognizable. The protection element may be a diode and may be formed by depositing a plurality of doped semiconductor layers over the substrate on which the MEMS device is formed. The second calculating module is for calculating coordinates of the center of the image.