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, ...
Every year, somewhere between 25 million and 30 million Christmas trees are sold in the United States. If you’re one of the people who decorate for the holiday with a freshly cut Christmas tree, you ...
Trees are the most spectacular plants in the garden. And since they grow so slowly, it is imperative that we treat them with utmost respect. That means pruning their limbs and branches correctly.
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