A measure of the radiation absorbed by the human body. It is measured in units of Watts/kg.

Relatively small wireless devices that constantly transmit digital data of users regarding the consumption of electricity, water, or gas.

The highest level of exposure allowed or recommended for any hazardous factor (radiation, chemical substance, etc.).  Its purpose is to safeguard against adverse health effects.  For most factors this threshold is a compromise, and does not imply certainty that there may be harmful effects above this level, or no harmful effects below it.

A segment of the electromagnetic spectrum with wavelengths longer than those of the infrared segment.  The range of RF, as defined by the International Telecommunications Union, is wide and ranges from 3 KHz to 300 GHz respectively. 

An instrument, device or technological system that produces or may produce non-ionizing radiation during its operation.  Examples of radiation sources:  cordless phones, mobile phones, cellular base stations, broadcasting stations, power lines, transformer stations, etc.

The transfer of energy by waves spreading through space or within any matter.

Large biological molecule composed of a sequence of small units of amino-acids. Proteins constitute a significant component of living organisms, and play an important role in both the structure of the cell and tissues, as well as in the function of the cells and the various body systems, such as: antibodies in the immune system, hormones (e.g. insulin), and enzymes (catalysts) in chemical processes in the body.

Quantitative expression of the possibility that an event will occur. An impossible event carries a probability of '0' and an absolutely certain event carries a probability of '1'.

A tool for managing health and environmental risks, applied when there is a significant level of scientific uncertainty regarding the overall health or environmental effects of a chemical or physical factor, it may be interpreted in different ways and thus is not uniformly applied.It is a guiding principle in determining policy for health and environmental protection.

The quantity of work of a physical system per unit of time per volume (volume power density, measured in standard units of Watts per cubic meter W/m³), or per area (flux density, measured in standard units of W/m²).