Hardie plank siding is a premium brand of cement board siding (also known as fiber cement board siding) produced by the James Hardie Company.ardie plank can be purchased with a wood-grain look, a plain smooth look or a stucco type finish. Hardie plank also comes in simulated cedar shingle planks.
activity duration. Period (hours, days, weeks) required to complete an activity. Activities with zero duration are called milestones.
Specific activity is the activity in curies (Ci) or becquerels (Bq) per gram of. material. For reference, 1 Ci is 3.7 Ã 1010 disintegrations per second, and the. specific activity of radium-226 is about 1 Ci/g. To convert specific activity expressed in curies to standard international units, multiply by 3.7 Ã 1010 Bq/Ci. The decay energy represents the average energy associated with the dominant decay modes, which is essentially the kinetic energy of the alpha