A packet processor transfers a message received by a first port to a second port. This prevention of HOL may be on an input where data is forwarded to each of a number of FIFOs or an output where data is de-queued from FIFOs. The one or more computer processors render the first area as a magnified image. or lower, has a main chain having a random structure, has epoxy groups, and has sulfur-crosslinkable sites. Preferred methods can protect the fuel cell, reduce the time for vehicle start-up and improve driving performance.