Social media content items are mapped to relevant time-based media events. The supercontinuum optical pulse source comprises one or more seed pulse sources, and first and second optical amplifiers arranged along first and second respective optical paths. As used in the disclosure, thermally stable may be defined as maintaining a measurable SES spectrum after the particle or any material tagged with the particle has been exposed to a temperature substantially higher than room temperature. The valve head of each intake valve is removably seated within a corresponding intake valve seat of the cylinder head, and the stem of each intake valve is movably positioned within the cylinder head.