In this manuscript, we study photonsphere, shadow, quasinormal modes, Hawking temperature, and greybody bounds of a non-rotating Simpson-Visser black hole which is regular hole. We observe that though the radius photonsphere does depend on parameter $\alpha$, shadow independent it. The found to be equal for Schwarzschild We, then, frequencies scalar electromagnetic perturbations with help $6$th...

Due to the decrease in cost, size and weight, \acp{UAV} are becoming more popular for general-purpose civil commercial applications. Provision of communication services both user data control messaging by using off-the-shelf terrestrial cellular deployments introduces several technical challenges. In this paper, an approach air-to-ground channel characterization low-height based on extensive me...

The background to this work was a prototype shadow sensor, which was designed for retro-fitting to an advanced LIGO (Laser Interferometer Gravitational wave Observatory) test-mass/mirror suspension, in which a 40 kg test-mass/mirror is suspended by four approximately 600 mm long by 0.4 mm diameter fused-silica suspension fibres. The shadow sensor comprised a LED source of Near InfraRed (NIR) ra...

HYPOTHESES Task performance improves with the use of a balanced degree of shadow and illumination compared with no or maximum shadow contrast; and overhead shadow-casting illumination is better than side illumination. DESIGN The standard task entailed touching target points on an undulating surface by using a surgical hook. Each run consisted of 13 target points in a random sequence. Five set...

The paper presents a new data structure called a shadow pyramid for storing 3D objects to reduce the shadow-testing time during ray tracing. For each primitive object that first intersects a ray, a shadow pyramid is constructed in which all the candidate objects that possibly block the path from the relevant light source to any point on the primitive object are registered. Shadow testing of. th...

I n the past decades, the effect of different tax amendments on various economic issues has been studied. The majority of these studies have avoided considering shadow economy as part of the calculation and analysis, and an issue, which has received little attention, is the relationship between green tax reforms and shadow economy, as for informal labor, which is well-connected to un...

A user-centric method for fast, interactive, robust, and high-quality shadow removal is presented. Our algorithm can perform detection and removal in a range of difficult cases, such as highly textured and colored shadows. To perform detection, an on-the-fly learning approach is adopted guided by two rough user inputs for the pixels of the shadow and the lit area. After detection, shadow remova...

The main result of this paper is to reduce the calculation of higher-order terms in the asymptotic expansions of the electric and magnetic elds at low frequencies to the solutions of certain canonical problems. We also provide a new and simple variational proof of the convergence of the electric and magnetic elds solutions of the scattering problem for the Maxwell equations as the frequency goe...

In this paper we present a method for illuminating a dynamic scene with a high dynamic range environment map with real-time or interactive frame rates, taking into account self shadowing. Current techniques require static geometry (pre-computed light transport), are limited to few and small area lights or are limited in the frequency of the shadows. We facilitate importance sampling of the envi...

The development in wireless technology, mobile smart devices and Internet of Things has gave birth to a booming era for the wireless indoor geolocation. This technology have been increasingly used within our daily life and help people to build up the tracking system which could be used by fulfillment centers and grocery stores. To achieve higher localization accuracy with wireless geolocation, ...