AIMS Tooth colored dental restorative materials should maintain their chromatic properties throughout their service period. The aim of this study was to examine the possible color changes of flowable resin composite filling materials following water storage. The effect of additional light curing on color stability of restorative materials was also investigated. MATERIALS AND METHODS Six brand...

Abstract—The objectives of this research are to produce prototype coconut oil based solvent offset printing inks and to analyze a basic quality of printing work derived from coconut oil based solvent offset printing inks, by mean of bringing coconut oil for producing varnish and bringing such varnish to produce black offset printing inks. Then, analysis of qualities i.e. CIELAB value, density v...

A psychophysical experiment has been conducted to test the threshold of color difference in displayed images under different viewing conditions. Four ISO SCID 400 images N2, N3, N5 and N7 were used as test images, whose colors were altered in lightness, chroma and hue attributes systematically to form the test image pairs with the original ones. The average color difference in all image pairs r...

The most commonly used method for formally assessing grapheme-colour synaesthesia (i.e., experiencing colours in response to letter and/or number stimuli) involves selecting colours from a large colour palette on several occasions and measuring consistency of the colours selected. However, the ability to diagnose synaesthesia using this method depends on several factors that have not been direc...

In the world of digital image and video processing, encoding and/or compression errors are often assessed in terms of the signal dimensions (e.g., RGB or YCBCR) using quantities such as RMS deviation or signal-to-noise ratio with little or no regard for the radiometric linearity of the quantities or the ultimate appearance to observers. When visual models are utilized it is usually with the aim...

South Africa is a water-scarce country due to the shortage of rainfall. This scarcity further exacerbated by loss water through leakage from faulty pipes. paper reports on use simple microfluidic device in early detection leakages. The paper-based (µPADs) were prepared printing patterns wax (100 μm width) surface and melting into form hydrophobic barriers. Solutions lower higher pH also introdu...