In a communication network architecture, a service provider monitors its customer’s experience as the customer selects and uses services offered by the service provider. Two shield members on the blower housing prevent the ambient air from mixing with the hot air of the engine. The multilayer coating set comprises at least one organic layer and at least one inorganic layer. The gear clutch meshes small end teeth of the gearwheel and is fitted with the teeth shaft of the middle shaft. This is achieve by first alloying Si with an element selected from the group consisting of Al, B, P, Ge, Sn, Pb, Ni, Co, Mn, Mo, Cr, V, Cu, Fe, Ni, W, Ti, Zn, alkali metals, alkaline earth metals, and combinations thereof, and then eluting X from the resulting alloy. When the report cannot be fulfilled, a message denying the report request may be provided to the user.