A fuel cell system has a reformer unit for generating a reformate which is provided as a fuel for a fuel cell unit. A link integrity signal indicative of any short circuits or open circuits in a first communication link is communicated. These methods may be used to identify text in mixed-content images, to determine text character edges and to achieve other image processing purposes. In the closed position, the lid closes the interior cavity. The run-time instrumentation information is stored in a run-time instrumentation program buffer as a reporting group. A digest is generated using a Merkle authentication tree corresponding to the set of validations, and this digest is signed with a private key.