"Magnet and Compass" is an educational simulation in HTML5, by PhET Interactive Simulations at the University of Colorado Boulder. For a description of this simulation, associated resources, and a ...

Abstract: In the geophysical exploration, the simulation and investigation of wavefields in the porous media including multiple discrete fractures is a challenging problem. The traditional numerical ...

Abstract: This article introduces a radial rectangular concentric grating (RRCG) backward wave oscillator (BWO). The design utilizes a radial sheet electron beam (RSEB). It aims to overcome the ...

ABSTRACT: The monetization of natural gas resources associated with oil production in Brazil's pre-salt layer represents a strategic pillar for the country’s energy and industrial development. This ...

Stellar image: The winning image captures the core of the Andromeda Galaxy (M31) in exceptional detail (courtesy: Weitang Liang, Qi Yang, Chuhong Yu) Photographers Weitang Liang, Qi Yang and Chuhong ...