Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

“Active flux” is an alternative unitary concept for the control of practically all ac drives. As aligned to rotor d-axis (for synchronous and flux-modulation machines) and to rotor flux axis for ...

Trump signals backing of direct $1,500 payments for millions of Americans 2 huge earthquakes strike within days. Is it a warning? While Trump got the 'FIFA Peace Prize,' something truly great happened ...