Boreal spring climate is uniquely susceptible to solar warming mechanisms because it has expansive snow cover and receives relatively strong insolation. Carbonaceous particles can influence snow coverage by warming the atmosphere, reducing surface-incident solar energy (dimming), and reducing snow reflectance after deposition (darkening). We apply a range of models and observations to explore i...

High dynamic range (HDR) displays with dual-panels are one type of that can provide HDR content. These composed a white backlight panel and colour LCD panel. Local dimming algorithms used to control the in order reproduce content high contrast at fidelity. However, existing local usually process low (LDR) images, which not suitable for processing images. In addition, these methods use hand-craf...

This paper introduces a novel dimming method for Light Fidelity (LiFi) based on time-domain sample index modulation (TIM), called indexed (iDim). The aim is to provide wide brightness range, while maintaining high signal-to-noise ratio (SNR) performance and transmission rate. Direct current optical orthogonal frequency division multiplexing (DCO-OFDM) used line codes are presented. system exper...

Free electrons deplete photons from type Ia supernovae through the (inverse) Compton scattering. This Compton dimming increases with redshift and reaches 0.004 mag at z = 1 and 0.01 mag at z = 2. Although far from sufficient to invalidate the existence of dark energy, it can bias constraint on dark energy at a level non-negligible for future supernova surveys. This effect is correctable and sho...

ABSTRACT We assess whether gravity darkening, induced by a tidal interaction during stellar fly-by, might be sufficient to explain the Great Dimming of Betelgeuse. Adopting several simple approximations, we calculate deformation and associated darkening in close encounter, as well reduction radiation flux seen distant observer. show that, principle, duration degree resulting dimming can used es...

LED luminaires with controllable luminous flux are increasingly used, mainly due to the need reduce electricity consumption, which is equivalent of improving energy efficiency a lighting installation. Changing dimming level changes spectral power distribution luminaire or light source. Knowledge characteristics including relationships provides opportunity optimize control algorithms and predict...