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, ...

Materials I used: Soft copper wire: - 20 gauge (wire diameter 0.8mm) - 7cm (2.8 inch) for each double heart link - 2cm (0.8 inch) for each beaded link - 2cm (0.8 inch) for the clasp Beads: 4mm (abacus ...

We asked a group of experts to envision the future of supply chains and how changes to them will impact national economies. By The New York Times This feature is part of a series called Turning Points ...