R-value (insulation) contain no trapped CFCs or HFCs (e.g., half-pound low density foams). On certain brands, twenty-year tests have shown no shrinkage or reduction in insulating value. This has led to controversy as how to rate the insulation of these products. Many manufacturers will rate the R-value at the time of manufacture; critics argue that a more fair assessment would be its settled value. The foam industry adopted the LTTR (Long-Term Thermal Resistance) method, which rates the R-value based on a 15-year weighted average. However, the LTTR effectively provides only an eight-year aged R-value, short in the scale of a building that
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