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, ...

Choose from 157 Piano Black Background stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else.

Supposing you’re at a shoe shop and you have free rein to select the slinkiest, most stratospherically-heeled jobs on the rack, but what you actually need is a good pair of hiking trainers… Oh, and ...

Share your traditions, weigh in on a seasonal debate, write a story, reflect on the year behind you, or prepare for the one ahead. By Natalie Proulx and Katherine Schulten The Times Upshot reporter ...