Abstract: We propose a quasi-closed-form refractive-index profile for flat radial gradient index (GRIN) lenses that allows the generation of direction-steerable quasi-nondiffracting beams in a wide ...

Spiral galaxies with a reported bend in the slope of gradient in the oxygen abundances (O/H)_R23, derived with traditionally used R23 - method, were examined. It is shown that the artificial origin of ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Abstract: With the use of cutting-edge demand management at the system or home level and powerful network reconfiguration tools, smart grids are expected to introduce advanced hardware and software ...

CSS background gradients are a great way to add some stunning colors and dimension to your website. Gradients give your website a professional look while also elevating the overall user experience.

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...