It's the coldest of cold cases, and yet 70 years after Amelia Earhart disappeared, clues are still turning up. Long-dismissed notes of a shortwave distress call beginning, "This is Amelia Earhart...." ...
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, ...
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