Significant in-band stray light (IBSL) error at solar zenith angle (SZA) values larger than 77◦ near sunset in 4 SBUV/2 (Solar Backscattered Ultraviolet) instruments, on board the NOAA-14, 17, 18 and 19 satellites, has been characterized. The IBSL error is caused by large surface reflection and scattering of the air-gapped depolarizer in front of the instrument’s monochromator aperture. The sou...

It is common, in deconvolution problems, to assume that the measurement errors are identically distributed. In many real life applications however, this condition is not satisfied and the deconvolution estimators developed for homoscedastic errors become inconsistent. In this paper, we introduce a kernel estimator of a density in the case of heteroscedastic contamination. We establish consisten...

Given the possibility of waterborne diseases caused by inappropriate rainwater harvesting systems, a survey was conducted in Uganda to assess existing knowledge of both physical and non-physical measures that safeguard harvested rainwater. Households who had received rainwater tanks were assessed on issues related to harvested rainwater quality. The study shows that 84% of respondents were awar...

We investigate the 21-cm emission from the epoch between reionization zr and Gunn-Peterson transparency zgp. According to the lognormal model of the thermal history around reionization, hydrogen clouds in zr > z > zgp are hot, and a predominant part of baryonic gas is ionized, but still opaque to Lyα photons. Therefore, 21-cm emission is a distinctive characteristic of this epoch. We show that ...

Parasites are commonly associated with vegetable or fruit borne outbreaks of gastroenteritis. Among all pathogenic intestinal parasites, helminthes cause the most number of parasitic infections in humans and animals, especially in developing countries. We conducted a study to determine the extent of parasitic contamination of raw vegetables sold in some markets of Casablanca (Morocco) .Vegetabl...

BACKGROUND Infectious disease interventions, such as vaccines and bed nets, have the potential to provide herd protection to non-recipients. Similarly, improved sanitation in one household may provide community-wide benefits if it reduces contamination in the shared environment. Sanitation at the household level is an important predictor of child growth, but less is known about the effect of sa...

The origin of meat products and any porcine contamination should be carefully analyzed for Halal certificaiton. Different methods are utilized for origin detection and of meat and meat products. Due to the sencitivity and selectivity, Real Time PCR is used widely in the area. In this method, even very small amounts of DNA can be determined. In this study, sausages from the most famous sausage b...

In order to ensure edible safety, more regard has been paid to pesticide contamination on agricultural product. Conventional techniques are used to measure pesticide contamination. However, the conventional analyses are not possible because of their destructive characteristic and the limitation of time and labor. Spectral technique can provide a rapid, nondestructive means to assess quality and...

A novel technique has been developed to build vessels for liquid xenon ionization detectors entirely out of ultra-clean fluoropolymer. We describe the advantages in terms of low radioactivity contamination, provide some details of the construction techniques, and show the energy resolution achieved with a prototype all-fluoropolymer ionization detector.