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, ...
History remembers Agnes Waterhouse as one of the most influential witches of the Tudor period. Although the Inquisition in Europe started their trails and executions much earlier, Agnes was the first ...
Editor's Note: Since this story was first published on February 2, the "Day Zero" when Cape Town is set to turn off its water supply has been moved back several times, first to May, and then even ...
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