To provide an EGR cooler which has a small number of parts and achieves compact design with low cost. The methods and apparatus effect reception of a first and second channels from the second communication network where the first channel has known characteristics. Ultimately, requests from the processing complexes are presented to the switch with operating system domain header information so that the shared SATA controller can determine which request came from which processing complex, and allocate resources accordingly. Adding winglets to fan blades may improve the aerodynamics of the fan blades, and thereby increase efficiencies of a fan. The processor is further configured to determine whether to adopt the first interval or the second interval based upon the values of the parameters. A direction of polarization of the light beam is parallel to an axis of the bundle.