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: A Spiritual Autobiography life. Poitier explores the nature of sacrifice and commitment, price and humility, rage and forgiveness, and paying the price for artistic integrity. What emerges is a picture of a man in the face of limits; his own as well as the world's. The translation in complicated Chinese () of this autobiography was done by Fongfong Olivia Wei, and published by Triumph Publishing Company in Taipei, Taiwan, in the year 2002. The Measure of a Man: A Spiritual Autobiography The Measure of a Man: A Spiritual Autobiography is an autobiographical work by Sidney Poitier. On January 26, 2007, Oprah Winfrey chose