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, ...

Step by step tutorial on how to make a LEGO brick vending machine using standard LEGO bricks. This video explains the full build process, including the internal layout, simple input system, and manual ...

Long-delayed inflation data will finally be released The $8 billion black market for Venezuelan oil is suddenly closing down Taylor Swift's Christmas card is here—and this is what it looks like Trump ...

Nikon's trade-in program lets consumers send in their old cameras and lenses for a credit that can be applied to a new camera or lens. This is a win for the environment and for photographers who want ...