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.
Definition. A herniated (slipped) disk occurs when all or part of a disk is forced through a weakened part of the disk. This may place pressure on nearby nerves or the spinal cord. Herniated nucleus pulposus (slipped disk).