Abstract: An integrated low-carbon energy system includes a controller configured to control an amount of H2 gas added to pipe-based delivery system that carries mixture of a fossil fuel in gaseous form with the H2 gas as a minority component by volume, an H2-compatible fuel cell that converts the mixed gas into electricity, a data interface that receives an H2 allocation request signal on behalf of a facility that receives electricity produced by the H2-compatible fuel cell, wherein in response to the H2 allocation request signal, the controller is configured to control a change an addition rate of H2 from a first level to a second level that corresponds with a level requested in the request signal.

Abstract: A system and method for licensing the use of “plug-in” type software that plays audio, video, and three dimensional content which logs the network address from which content is downloaded and played by the plug-in client software, then sends this information to a billing system maintained by the plug-in software developer. This billing system can then bill the content provider that is associated with the network address based on the number of times the content is played by users of the plug-in software. The system and method can also employ a public key encryption scheme to ensure that the network address information received by the plug-in software is valid and to block the playing of content from content providers that are delinquent in their license payments.