Gray (unit) Gray (unit) The gray (symbol: Gy) is a derived unit of ionizing radiation dose in the International System of Units (SI). It is defined as the absorption of one joule of radiation energy per kilogram of matter. It is used as a unit of the radiation quantity absorbed dose which measures the energy deposited in a unit mass at a certain position, and of the radiation quantity kerma, which is the amount of energy that is transferred from photons to electrons per unit mass at a certain position. The corresponding cgs unit to the gray is the rad (equivalent to
Work unit Communist Party infrastructure. Work units were the principal method of implementing party policy. Also workers were bound to their work unit for life. Each "danwei" created their own housing, child care, schools, clinics, shops, services, post offices, etc. The unit concept used in developing the work unit comes from Hegelian and especially behaviorist social science. Other related examples include the neighbourhood unit in developments, study of living creatures at the level of a defined ecological unit, the entity concept from accounting, the strategic business unit in commerce, the unit concept of church fellowship in the Wisconsin Evangelical Lutheran Synod, the