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, ...

The story is no longer just about banditary. In Northern Nigeria, kidnapping has grown into a sophisticated, systematized corporate machine, an economy where human beings are the raw material and ...

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EchoSpace is a user-friendly blog management system where users can create and share content. It features user registration, blog posting, admin approval, and a category-based structure for easy ...

If you decide a product is not suitable within 14 days of delivery, you can return it to us for a replacement or refund. Returns must be unused and in their original, undamaged packaging. Some items ...