Richard J. Harper

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Current estimates of soil organic carbon (SOC) are based largely on surficial measurements to depths of 0.3 to 1 m. Many of the world’s soils greatly exceed 1 m depth and there are numerous reports of biological activity to depths of many metres. Although SOC storage to depths of up to 8 m has been previously reported, the extent to which SOC is stored at(More)
The use of Simulation for evaluating manufacturing lines has become an accepted means of gathering information and understanding of the lines. One of the primary reasons for this acceptance is the fact that the analysis is now being performed by the people who are experts in the process; those who understand the real world interactions inherent to their(More)
Manufacturing process simulation has long been the domain of mathematicians, operations researchers, and consultants; a relatively small, exclusive group of expert practitioners. Consensus has held that only these individuals can successfully practice the craft of simulation. This thinking persists, even today. There are still many manufacturers who believe(More)
The possibility of using bioenergy as a climate change mitigation measure has sparked a discussion of whether and how bioenergy production contributes to sustainable development. We undertook a systematic review of the scientific literature to illuminate this relationship and found a limited scientific basis for policymaking. Our results indicate that(More)
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