Ann Ib Postgrad Med
April 2024
Background: Mortality associated with neonatal surgical emergencies is high, due to late presentation and delayed surgical intervention in developing countries. The aim of this study is to determine factors associated with poor outcome of neonatal surgical emergencies at a Federal Teaching Hospital Northeastern Nigeria.
Methods: A retrospective study of 85 neonates aged 1-28 days was carried between June 2019-May 2022.
Colour constancy is the perceptual phenomenon that the colour of an object appears largely unchanged, even if the spectral composition of the illuminating light changes. Colour constancy has been found in all insect species so far tested. Especially the pollinating insects offer a remarkable opportunity to study the ecological significance of colour constancy since they spend much of their adult lives identifying and choosing between colour targets (flowers) under continuously changing ambient lighting conditions.
View Article and Find Full Text PDFThe perceived color of an object depends on its spectral reflectance and the spectral composition of the illuminant. Thus when the illumination changes, the light reflected from the object also varies. This would result in a different color sensation if no color constancy mechanism is put in place-that is, the ability to form consistent representation of colors across various illuminants and background scenes.
View Article and Find Full Text PDFBackground: Flower colour is of great importance in various fields relating to floral biology and pollinator behaviour. However, subjective human judgements of flower colour may be inaccurate and are irrelevant to the ecology and vision of the flower's pollinators. For precise, detailed information about the colours of flowers, a full reflectance spectrum for the flower of interest should be used rather than relying on such human assessments.
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