Peak flow means the maximum instantaneous rate of flow of water at a particular point resulting from a storm event.
Peak tube potential means the maximum value of the potential difference across the x-ray tube during an exposure.
Short-rotation coppice means a specific management regime whereby the poles of trees are cut every one to two years and which is aimed at producing biomass for energy. It is exempt from the UK government timber procurement policy requirements and falls under agricultural regulation and supervision rather than forestry. The exemption only refers to short-rotation coppice, and not 'conventional' coppice which is forest management and therefore subject to the timber policy.
Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent such that the exposure rate is reduced to one-half of its original value. In this definition the contribution of all scattered radiation, other than any which might be present initially in the beam concerned, is deemed to be excluded.
Production company means a person or entity engaged in the business of making motion picture, television, or radio images for theatrical, commercial, advertising, or education purposes; Reserved