69 research outputs found
Estratégias para a segurança do paciente no processo de uso de medicamentos após alta hospitalar
A uniform chromaticity diagram based upon a square root transformation of the colour space
A zone theory of colour vision
Arguments are put forward to explain the basic facts about color vision in the frame work of a zone theory, a combination of the Young-Helmholtz and the Hering theory. Data on wavelength discrimination in particular as a function of luminance, necessitate to assume separate mechanisms for red-green and for yellow-blue discrimination (Hering). Some psychophysical data on the other hand, like the Stiles-Crawford effects and those on chromatic adaptation, give reason to assume three different visual pigments in the reception, of which the spectral absorption curves and the densities can be derived
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