Various embodiments enable local web applications to communicate asynchronously with web based services and applications based on a local device’s current state and a user’s communications preferences. According to an exemplary embodiment of the present invention, an examination apparatus is provided in which different spectral measurement data are acquired immediately one after another during the same acquisition run by performing a focal spot switching during data acquisition. Methods for coating a device with a radioisotope comprising are also disclosed. A trade amount is surrendered by the player as part of the trade for the bonus event, and the bonus event is presented to the player for participation, thereby allowing the player to engage in bonus activity otherwise unavailable to the player. More specifically, in one embodiment, there is provided a method comprising accessing an identifier associated with a computer system, and performing at least one mathematical function on the identifier to create a pre-shared key for the computer system.