Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Abstract: With the rapid advancement of three-dimensional laser ranging imaging technology and the continuous expansion of array scale, more demanding requirements such as stronger anti-interference ...

Abstract: True-time-delay (TTD) arrays can implement frequency-dependent rainbow beams and enable fast beam alignment in wideband millimeter-wave (mmWave) systems. In this paper, we consider 3D ...

Indian Railways is deploying advanced heat-mapping technology at 35 major stations to manage the massive Chhath festival rush. Nearly 13,000 special trains, double last year's number, are being ...

What makes a passport “powerful”? Well, a clear measure is travel openness, the ability to slip into destinations around the world with a breezy wave of your passport, no visa required. The Henley ...

Denny Hamlin became the 11th driver to reach the 60-win mark in the NASCAR Cup Series, prevailing Sunday at Las Vegas Motor Speedway in a win that secured his spot in the Championship 4. The victory, ...

Devin Mockobee's ascent on Purdue's all-time rushing list continued on Saturday night in Minnesota. The senior running back climbed another rung with a 98-yard performance against the Golden Gophers.

Lane Kiffin and the Ole Miss Rebels will take on the Georgia Bulldogs this Saturday afternoon. / Petre Thomas-Imagn Images This past weekend of college football was chock full of drama. And now? We're ...

The Chiefs All-Pro tight end Travis Kelce settled for three catches before halftime. But he scaled past Jason Witten for one NFL TE mark. Travis Kelce ascended to new NFL history for the Kansas City ...