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Furthermore, perturbative analyses of the gradient flow in non-Abelian gauge theories have provided a firm theoretical foundation that supports its application across diverse energy regimes [3].

Conjugate gradient methods form a class of iterative algorithms that are highly effective for solving large‐scale unconstrained optimisation problems. They achieve efficiency by constructing ...

In this communication, the design of a circularly polarized (CP) perforated gradient index (GRIN) flat lens antenna with directive beam-steering properties is presented for millimeter-wave ...

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Do you get a headache after staring at your monitor for hours at a time? Blue light glasses might help. Here's how to pick a pair that works best for you, along with some of our favorites.

Best running sunglasses to keep your eyes protected in 2025 As summer approaches, shielding your eyes is extremely important, so here's our list of 13 of the best running sunglasses on the market ...

A gradient index (GRIN) lens is proposed and demonstrated for efficiently focusing incident waves in terahertz regime. This lens is composed of three layers of metamaterial based on annular slots, ...

The best triathlon sunglasses will divert sunlight, blustery wind, bugs and more from your vision on the bike and run. Here are our top picks.