Optical signals are transmitted via fiber optic cables. To provide structural support, a plurality of auxiliary side walls extend from the ends and the middle of the first and second side walls. As a result, the increased number of arms provides the desired tension as the occlusion device is deployed and provides the desired strength to hold the occlusion device in place and properly occlude the defect. After work computer 3 has completed verification of the user through the personal verification information and digital signature stored in mobile media 5, the same computer environment that was present when that user used work computer 2 is provided. The actuator system can be arranged to concentrate an analyte present in a sample.