Abstract: A large-scale antenna array is an enabling technique for millimeter-wave communications. Uniform circular arrays (UCAs) have the spatial invariance property, ensuring the same beamforming ...

Abstract: In this paper, we propose a novel distortion calibration algorithm for uniform circular array (UCA) based on its special structure. A near-field calibration antenna, located in the center of ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

New Scientist Book Club has been reading Alex Foster’s debut novel, Circular Motion, in which he charts what would happen if Earth’s rotation sped up by not just a millisecond, but a minute, or an ...

A striking composition where swirling colors wrap around a circular frame, creating a sense of movement and energy within a balanced, enclosed space. Fighter jets deployed to escort Ryanair plane ...

A rack and pinion steering system consists of a pinion (a circular gear) with a rack (a linear gear). The system works by converting a revolving motion into linear motion. Most cars, small trucks, and ...

Check the latest CBSE Class 9 Science Syllabus 2025–26 with unit-wise weightage, exam pattern, internal assessment details, and excluded topics. Download the detailed syllabus in PDF here. The CBSE ...