(e.g., the unit of energy 1 J = 1 kg m2/s2, or of absorbed dose 1 Gy = 1 J/kg = 1 m2/s2)

SPEERA: Secretarial Panel for the Evaluation of Epidemiological Research Activities (DOE)

SRS: Savannah River site

SSAB: Site-Specific Advisory Board (DOE)

Standardized morbidity ratio or standardized mortality rate (SMR): Rate (multiplied by 100) of mortality from a disease in the population being studied divided by the comparable rate in a standard population; ratio is similar to a relative risk times 100

TAG: Technical Assistance Grant

TCA: Trichloroethane

TCE: Trichloroethylene

TDH: Tennessee Department of Health

Threshold hypothesis: Assumption that no injury occurs below a specified dose

TSCA: Toxic Substances Control Act

TSP: Technical Steering Panel composed of independent scientists and members of the public created to oversee and direct HEDR

Uncertainty: Range of values within which the true value is estimated to lie; a best estimate of possible inaccuracy due to both random and systemic errors:

Random Errors: Errors that vary in a nonreproducible way around a limiting mean; these can be treated statistically by use of the laws of probability

Systemic Errors: Errors that are reproducible and tend to bias a result in one direction; their causes can be assigned, at least in principle, and they can have constant and variable components; generally, these errors cannot be treated statistically

UNSCEAR: United Nations Scientific Committee on the Effects of Atomic Radiation

X-rays: Penetrating electromagnetic radiation, usually produced by bombarding a metallic target with fast electrons in a high vacuum

YDI: Youth Development, Inc.

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