Temperature Measurement Standards. ASTM's temperature measurement standards provide the material and property specifications, as well as guides for the testing, calibration, and use of laboratory, industrial, and clinical instruments used in the determination of thermal variables, particularly temperature.
A bulging disc occurs more often as we age or as repetitive activities weaken the the disc. Herniated discs are more often specifically related to trauma/injury sustained and are more acute (sudden) in onset.
A herniated disc is often the result of an injury or trauma to the spine. It results when a crack in the tough outer layer of cartilage allows some of the softer material inside to protrude out of the disc. Herniated discs are also called ruptured discs or slipped discs.