2008 Volume 73 Issue 623 Pages 131-137
Ultraviolet radiation is divided into UV-A (320-400nm), UV-B (290-320nm), UV-C (under 290nm). Of these, UV-B may be cause serious health problem, such as cataracts, loss of skin immunity, and increase of skin cancer. For this reason, it is important to know how to protect human body against the UV-B radiation. Shade is very effective to prevent the radiation. The radiation enters to the shade from sun and sky. The first step is to measure the sky radiance distribution of sun and sky radiation spectrum. We calculate erythema action radiation from the radiation spectrum. UV shade chart is made using distribution of the erythema action ultraviolet radiation. Using the chart, the shade is designed for protect against the UV radiation.
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