E ( " t " ) is the sum of the products of the committed organ or tissue equivalent doses and the appropriate tissue weighting factors " W"
2.
For instance, air kerma rate is converted to tissue equivalent dose using a factor of Sv / Gy ( air ) = 1.21 for Cs 137 at 0.662 MeV.
3.
The ICRP defines Committed effective dose, E ( " t " ) as the sum of the products of the committed organ or tissue equivalent doses and the appropriate tissue weighting factors " W"
4.
The ICRU sphere is a theoretical 30 cm diameter " tissue equivalent " sphere consisting of a material with a density of 1 g�cm " 3 and a mass composition of 76.2 % oxygen, 11.1 % carbon, 10.1 % hydrogen and 2.6 % nitrogen.
5.
The purpose of this expedition was to test for NASA a meter called a Tissue Equivalent Proportional Counter ( TEPC ) : testing at different altitudes ( 17, 000 ft, 19, 000 ft and 21, 000 ft ) would reveal how people s bodies would be affected, including the way bodily tissues behaved, when struck by radiation, and this was important for the planning of long duration space missions.
6.
This observation is readily understood by noting that the average tissue self-shielding of sensitive organs is about 10 cm, and that secondary radiation produced in tissue such as low energy protons, helium and heavy ions are of high LET and make significant contributions ( > 25 % ) to the overall biological damage from GCR . Studies of aluminum, polyethylene, liquid hydrogen, or other shielding materials, will involve secondary radiation not reflective of secondary radiation produced in tissue, hence the need to include tissue equivalent shielding in studies of space radiation shielding effectiveness.
7.
Cargo in the pressurized compartment includes 30 bags filled with potable water ( 600 liters ), food, crew commodities, CDRA Bed ( Carbon Dioxide Removal Assembly ), TPF ( Two-Phase Flow ) experiment unit, PS-TEPC ( Position-Sensitive Tissue Equivalent Proportional Chamber ) radiation measurement instrument, ExHAM ( Exposed Experiment Handrail Attachment Mechanism ), HDTV-EF2 hi-def and 4K camera, new J-SSOD ( JEM Small Satellite Orbital Deployer ), and CubeSats ( AOBA-Velox III, TuPOD which comprises two TubeSats ( and OSNSAT ), FREEDOM, WASEDA-SAT3 ).
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