In ICRP 1990 Recommendations, a new weighting factor——radiation weighting factorW_R was introduced to replace the quality factor Q for modifying the absorbed dose averaged over atissue or organ.

在国际放射防护委员会（ICRP）1990年新建议书中，引入了一个新的权重因数——辐射权重因数W_R，以取代原来使用的品质因数Q，用于对组织或器官中的平均吸收剂量按辐射品质进行加权。

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Ironically, because past research studying the after-effects of exposure to things like atom bombs and radiation treatments for cancer suggests the most important environmental risk factor for meningiomas is ionising radiation.

ECONOMIST: Confirmation that dental X-rays can be bad for you

This instrument monitors high-energy radiation considered to be a health risk to astronauts and a factor in whether microbes could survive on Mars' surface.

ENGADGET: Curiosity rover finds radiation levels on Mars are safe for humans

The result is a material that is not only waterproof but is able to block out UV radiation from the sun to such an extent that it would rate a Ultraviolet Protection Factor (UPF) of 101.15 if the chart went that high.

FORBES: Chinese Researchers Develop Waterproof Cotton