We measure the mean halo-mass of z ≃ 0.5 Mg II absorbers using the cross-correlation (over co-moving scales 0.05–13h Mpc) between 1806 Mg II quasar absorption systems and ∼ 250,000 Luminous Red Galaxies (LRGs), both selected from the Sloan Digital Sky Survey Data Release 3. The Mg II systems have λ2796 rest-frame equivalent widths W r & 0.3 Å. From the ratio of the Mg II–LRG cross-correlation t...

Dye-sensitized solar cells have attracted a lot of research interest due to the quest for an alternative energy supply given that it is cost-effective and its materials are easily available. However, need improve conversion efficiency these cell devices has necessitated search new will lead more conversion. One such material tin (II) sulfide (SnS). In present study, we report results from synth...

The effect of commercial oxygen absorbers on sliced ham quality packaged in barrier film (OTR @ 60cc/m/da) under rigorous display conditions was investigated. Atmospheric pressure, vacuum, and CO2 back-flushed packaging methods were used. Color, microbial counts, lipid oxidation, and sensory odor were evaluated weekly over a period of 79 days in 10°C storage under fluorescent light. Ham contain...

The world is moving at a fast pace in the consumption of non-renewable natural resources, causing several ecological problems. search for cost reduction by implementing renewable energies implies optimization manufacturing processes parameters consolidated technologies, such as solar thermal energy collectors. One applications selective surfaces to improve performance absorbers. purpose this wo...

We have discovered a correlation between the X-ray absorbing column densities within Seyfert galaxies and the relative alignment between the central engines and their host galactic disks. This correlation carries several implications for Seyfert unification models. (1) In addition to small-scale circumnuclear absorbers, there are absorbing systems associated with the host galactic plane that ar...

We observed the Seyfert 1 galaxy NGC 3516 twice during the ight of Astro-2 using the Hopkins Ultraviolet Telescope aboard the space shuttle Endeavour in March 1995. Simultaneous X-ray observations were performed with ASCA. Our far-ultraviolet spectra cover the spectral range 820{1840 A with a resolution of 2{4 A. No signiicant variations were found between the two observations. The total spectr...

The relationship between exposure to ultraviolet (UV) radiation and skin cancer urges the need for extra photoprotection, which is presently provided by widespread commercially available sunscreen lotions. Apart from having a large absorption cross section in the UVA and UVB regions of the electromagnetic spectrum, the chemical absorbers in these photoprotective products should also be able to ...

Metamaterial absorbers are photonic structures composed of an array of sub-wavelength metallic patterns. Results in literature are usually based on structures of nominal dimensions, despite the significant effect of fabrication tolerances on performance. This research aims to identify the main sources of uncertainty and to investigate their effect, notably that of an irregular surface quality (...

Microwave Kinetic Inductance Detectors (MKIDs) are thin-film, superconducting resonators, which are attractive for making large detector arrays due to their natural frequency domain multiplexing at GHz frequencies. For X-ray to IR wavelengths, MKIDs can provide high-resolution energy and timing information for each incoming photon. By fabricating strip detectors consisting of a rectangular abso...

We combine a high-resolution hydro-simulation of the ΛCDM cosmology with two radiative transfer schemes (for continuum and line radiation) to predict the properties, spectra and spatial distribution of fluorescent Lyα emission at z ∼ 3. We focus on line radiation produced by recombinations in the dense intergalactic medium ionized by UV photons. In particular, we consider both a uniform backgro...