6 research outputs found
Cloud cover and horizontal plane eye damaging solar UV exposures
The spectral UV and the cloud cover were measured at intervals of 5 min with an integrated cloud and spectral UV measurement system at a sub-tropical Southern Hemisphere site for a 6-month period and solar zenith angle (SZA) range of 4.7 degrees to approximately 80 degrees. The solar UV spectra were recorded between 280 and 400 nm in 0.5 nm increments and weighted with the action spectra for photokeratitis and cataracts in order to investigate the effect of cloud cover on the horizontal plane biologically damaging UV irradiances for cataracts (UVBEcat) and photokeratitis (UVBEpker). Eighty five percent of the recorded spectra produced a measured irradiance to a cloud free irradiance ratio of 0.6 and higher while 76% produced a ratio of 0.8 and higher. Empirical non-linear expressions as a function of SZA have been developed for all sky conditions to allow the evaluation of the biologically damaging UV irradiances for photokeratitis and cataracts from a knowledge of the unweighted UV irradiances
Impact of Removable Partial Denture on Quality of Life measured after 6 Months and 1 Year of Use
Application of different patella height indices in patients undergoing total knee arthroplasty
Impacts of climate change on the amphibians and reptiles of Southeast Asia
10.1007/s10531-010-9782-4Biodiversity and Conservation1941043-1062BONS