Method and apparatus for detection and correction of oscillator frequency error within a wireless communication system receiver. Protein and variant levels can be determined using quantitative methods in which the proteinvariant signals are normalized to signals of internal reference standard species and the values compared to working curves constructed from samples containing known concentrations of the protein or variants. A valve spring is positioned between the valve and the cylinder head and biases the valve to a closed position. Contact content in a web-based social network database record in the web-based social network database is updated to include the associated GPS identifier and status for the web-based social network member. The specular layer is arranged on the printed layer to reflect a light incident to the specular layer. In an alternate embodiment set forth by way of example and not limitation, a method to provide USB charger identification includes providing a first USB charger identification at a USB D+ port and a D\u2212 port, Next, it is detected if the first USB charger identification was inappropriate.