An automatic method and apparatus for providing services on a computer system. A 20 amino acid peptide of the HBD was synthesized and shown to recapitulate the characteristics and specificity of hepcidin binding to cell surface ferroportin. In one implementation, the present invention provides a filtering and aggregation mechanism that can seamlessly adapt to changes in measurement policy configuration. Such optical properties include the characteristic wavelengths of FBGs, Fabry-Perot cavities, and the like. Access to the one or more documents is automatically provided on the mobile device during a second event scenario related to the first event scenario.