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, ...
Hundreds gathered to say goodbye when 700-year-old Pizol died. The funeral in Switzerland in 2019 was solemn. Mourners wore black; flowers were laid; a priest spoke. It was a symbolic moment: Pizol ...
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