A polycarbonate polymer such as poly acts as a positive electron beam resist, is substantially transparent to ultra violet light and that depolymerizes when heated. Randomly reflected emitted IR radiation is detected by the IR detector which sends as IR detector output to a control module. It is possible to solve the state of competing for the bus access right between both buses. Next, the system generates a composite score for the candidate activity by calculating a weighted average of the collaborative filtering score, the soft query score, the content preference score, and the distance score.