A silicon-based light emitting structure is formed as a high density array of light-emitting p-n junctions that substantially increases the intensity of the light emitted in a planar region. When the peripheral module is installed in the socket, the case of the peripheral module coupled to the corner of the PDA housing will form an integrated corner of the PDA housing. The system compares the qualifications of the candidates to the job criteria for the job postings and determines a match between the qualifications and the job criteria. The anti-restenotic medical devices include stents, catheters, micro-particles, probes and vascular grafts. The fiducial markers then are aligned in standard image processing or image analysis software with simple image translation and rotation operations, without the need for more advanced scaling, distortion or other operations.