R-value (insulation) as ASHRAE 90.1 and the IECC prescribe U-values. However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. The SI (metric) unit of R-value is whereas the I-P (inch-pound) unit is For R-values there is no difference between US customary units and imperial units, so the same I-P unit is used in both. Some sources use ″RSI″ when referring
The Measure of a Man (Star Trek: The Next Generation) fundamentals of the "Star Trek" philosophy and what Gene Roddenberry had been writing about in different ways from the mid ’60s." But he said that his favourite episode was "The Inner Light". On Twitter in April 2013, Marina Sirtis (Troi) named this as her favorite episode. "Entertainment Weekly" said that "It is well-established Trek gospel that the first truly great episode of Star Trek: The Next Generation is 'The Measure of a Man'". Mark Jones and Lance Parkin, in their book "Beyond the Final Frontier : An Unauthorised Review of Star Trek", called "The Measure of a Man" "a blunt