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, ...

Like many ancient rhymes, stories and songs, The Twelve Days of Christmas has been the subject of countless explanations of its ‘real meaning’. Some have suggested that it is an ancient version of a ...

Thank you for your commitment and dedication to your Christmas Bird Count circles. This page provides materials and resources for compilers and regional editors to help plan and conduct your count. To ...

Whether you’re planting in your yard, on a windowsill, or in a public space, you can help create more bird-friendly habitats with native plants. Find the best plants for your area (and where to get ...