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, ...

While I was playing “All by Myself” on a public piano, she started to sing — and her voice completely changed the moment. A spontaneous duet that felt truly special. Boy, 9, feels unwell after ...

I was playing piano in a public space when a violinist appeared and started playing along. We didn’t plan anything — but our instruments seemed to connect instantly. Her tone, timing, and emotion ...