Polymers containing one or more fluorene moieties attached to the polymer backbone, sunscreen compositions including a mixture of a photoactive compound and a polymer containing one or more fluorene moieties attached to the polymer backbone are described herein. A data processing module includes a read address generator, read FIFO, write address generator, write FIFO, and arbiter and is connected to a host arbiter through a 1-channel port. A gas fuel temperature is measured. An electronic document to be printed is parsed for a mark indicating a beginning point for a hotspot, a transformation rule is a applied to a portion of the electronic document between the mark indicating the beginning point for the hotspot and a mark indicating an ending point for the hotspot, and the transformed electronic document is rendered. HVAC information may include relay status of a relay in the HVAC system. The part is fabricated using a microwave sintering process prior to welding.