We use B and V data of globular cluster variables to derive a formula for the distance moduli of RRab stars. The method employs the Fourier decomposition of the V light curve and the averageB−V colour index. By using our former result for the V0 absolute magnitude, we also obtain an expression for the dereddened colour index. With the aid of the new formulae, the relative distance moduli can be...

The launch of Ocean and Land Colour Instrument (OLCI) on board Sentinel-3A in 2016 is the beginning of a new era in long time, continuous, high frequency water quality monitoring of coastal waters. Therefore, there is a strong need to validate the OLCI products to be sure that the technical capabilities provided will be used in the best possible way in water quality monitoring and research. The...

A statistical study of global galaxy parameters can help to improve our understanding of galaxy formation processes. In this paper we present the analysis of global galaxy parameters based on optical and near-infrared observations of a large sample of edgeon disc galaxies. We found a correlation between the ratio of the radial to vertical scale parameter and galaxy type: galaxies become systema...

Non-destructive quality inspection of fruits provides quality products for domestic consumption as well as for export markets, increasing consumer/buyer confidence. It provides assurance of quality and subsequent value addition. A major thrust of current research is towards the development of quality inspection systems for improved sorting and automated quality control. Machine Vision inspectio...

Preliminary work done by the Sugar Milling Research Institute (SMRI) showed that the HunterLab colour measuring system could possibly be used to estimate the colour of raw sugar. With this system it was possible to measure the colour within a short time (less than one minute). The instrument (ColorQuest LAV 4S0/0") has been used for several seasons at the Transvaal Sugar Limited Malelane (ML) f...

We present the structural parameters (half light radius r e , mean surface brightness < µ > e within r e and Sersic index n) in the R, I and K bands for N ∼ 60 galaxies in the cluster A 2163B at z ∼ 0.2. The structural parameters are used to estimate the internal colour gradients of bulge–dominated (n > 2) galaxies. For the first time, we perform a comparative optical/NIR analysis of the log r ...

The objective of this study is to investigate the effects of irradiation from light-emitting diodes (LEDs) on several fruits during storage. To improve storage and increase the contents of some bioactive compounds, apple, tomato and red bell pepper fruits were exposed to yellow light emitted from the diodes at 590 nm. The contents of ascorbic acid, total phenolics, total flavonoids and several ...

The paramer mismatch-based spectral gamut mapping framework is an approach which optimizes the spectral reproduction colorimetrically for multiple viewing conditions. Unfortunately, due to the pixelwise nature of this method, almost similar neighboring pixels might be mapped to completely different colorants which yield disturbing banding artifacts. The previous proposed solution for this probl...

Abstract This study was carried out to utilize the extract of Terminalia catappa leaves as natural dyes powder on cotton fabric using alum mordant and various solvents. were extracted solvents water, 25% ethanol, 50% 75% 100% ethanol at a ratio 1:10 with pre-mordanting fixation methods. Natural characterized parameters colour direction, intensity, fastness. It found that type solvent affected d...