A system for the generation of hydrogen for use in portable power systems is set forth utilizing a two-step process that involves the thermal decomposition of AlH3 followed by the hydrolysis of the activated aluminum byproduct to release additional H2. In many situations in use of a handheld computer, for example, it is desirable to obtain quick and easy access to addressable resources from among a list of such resources. The first account profile on the first mobile communications device is modified based on the transactional information. Tortillas and other traditional corn products can be made from the soy and corn dough mass. The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and annealing the anti-oxidant doped UHMWPE in a super critical fluid, and materials used therein.