Christel Hamann’s difference engine was a type of mechanical calculator made in the 1900s. It was automatic and could help people calculate and arrange polynomial functions used in science, ...

Objective: Where patient level data are available on health care costs, it is natural to use statistical analysis to describe the differences in cost between alternative treatments. Health care costs ...

ABSTRACT Surface incident solar radiation G determines our climate and environment, and has been widely observed with a single pyranometer since the late 1950s. Such observations have suggested a ...

Life cycle assessment (LCA) and greenhouse gas (GHG) inventories are two key measurement tools being used to track an organization’s environmental impact. Is one more effective than the other? The ...