This paper presents a comprehensive review, modeling, simulation, and evaluation of multipath propagation mechanisms—reflection, scattering, diffraction, and fading—relevant to 5G communication, with ...

1 Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, China 2 Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, China AlGaN-based deep ultraviolet ...

The formation of a rainbow requires the observer to be between the sun and falling rain, with the rain in front and the sun behind. Sunlight passes from behind the observer, refracts as it enters each ...

Reflection AI, a startup founded just last year by two former Google DeepMind researchers, has raised $2 billion at an $8 billion valuation, a whopping 15x leap from its $545 million valuation just ...

The big fund-raising round was the latest sign of investor fervor for artificial intelligence companies despite concerns that the boom is overheated. By Michael J. de la Merced For much of the past ...

New teachers are often told that engaging lessons are one of the most important elements of student learning. This is true, but instead of giving ideas for how to engage students, I’m here to offer a ...

This work achieves the refraction and reflection of flexoelectric-induced directrons at interfaces. With identical physical properties of the media on both sides of the interface, as well as uniform ...

Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...

For the first time, scientists have demonstrated that negative refraction can be achieved using atomic arrays - without the need for artificially manufactured metamaterials. Scientists have long ...

High-frequency signals, like those used in 5G communications, are reflected by impedance discontinuities. Their shorter wavelengths can change their impedance. When a signal arrives at an impedance ...

A mirror, mechanically defined, is a sheet of substrate or metal that reflects incoming light. The polished side of a mirror, frequently coated with a layer of metal amalgam or made from naturally ...