An in-grade light fixture comprises a light fixture housing arranged to be buried substantially below grade level. The order of addition of the isocyanate and the different nucleophiles can tailor the distribution of di-urethane, mixed urethaneurea, andor di-urea molecules in the final resin product. In one embodiment, the mobile device may have multiple levels of trust associated with it. Moreover, packets destined for processing by the processor and placed into the cache memory are tracked, without the processor’s intervention, to determine if the processor has, in fact, completed the processing of those packets.