Results 31 to 40 of about 246,167 (257)
A Study on mm-Wave Propagation in and Around Buildings
IEEE Open Journal of Antennas and Propagation, 2023 mm-waves are envisaged as a key enabler for 5G and 6G wireless communications, thanks to the wide bandwidth and to the possibility of implementing large-scale antenna arrays and advanced transmission techniques, such as massive MIMO and beamforming, that
Leonardo Possenti +5 more
doaj +1 more source
, 2008 We describe an extension to the Geant4 software package that allows it to be used as a general purpose X-ray tracing package. We demonstrate its use by building a model of the X-ray optics of the XMM-Newton, calculating its effective area, and comparing ...
Agostinelli +8 more
core +1 more source
RadioPropa - A Modular Raytracer for In-Matter Radio Propagation [PDF]
, 2018 Experiments for radio detection of UHE particles such as e.g. ARA/ARIANNA or NuMoon require detailed understanding of the propagation of radio waves in the surrounding matter. The index of refraction in e.g.
Winchen, Tobias
core +2 more sources
A new hybrid geometrical optics and radiance based scattering model for ray tracing applications [PDF]
, 2005 This paper presents a new hybrid geometrical optics (GO) and radiance based rough surface scattering model for use in ray tracing propagation models. The reflectance model includes the effects of both specular and diffuse reflection.
Ng, KH, Nix, AR, Tameh, EK
core +2 more sources
Foveated Denoising for Ray Tracing Rendering
IEEE AccessFoveated graphics allocate computational load in light of the non-uniform nature of the human visual system (HVS), accelerating the scene rendering of virtual reality (VR).
Daiyun Guo, Yan Zhang, Xubo Yang
doaj +1 more source
Study of lower hybrid wave propagation in ionized gas by Hamiltonian theory
, 2013 In order to find an approximate solution to the Vlasov-Maxwell equation system describing the lower hybrid wave propagation in magnetic confined plasmas, the use of the WKB method leads to the ray tracing equations.
Cardinali, Alessandro, Casolari, Andrea
core +1 more source
An analytical model for turbulence scattered rays in the shadow zone for outdoor sound propagation calculation [PDF]
, 2009 In outdoor sound propagation, an inherent problem of the ray tracing method is its inability to determine the sound pressure level in the shadow zone, where geometrical rays do not penetrate.
Lam, YW
core +1 more source
FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
Massively Parallel Ray Tracing Algorithm Using GPU
, 2015 Ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane and simulating the effects of high-quality global illumination at a heavy computational cost.
Huang, Xiang, Lin, Jianbiao, Qin, Yutong
core +1 more source
Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity
Molecular Oncology, EarlyView.Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung +17 more
wiley +1 more source