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 Justice Department released a portion of the Jeffrey Epstein files to meet the Friday deadline established in a congressional bill with a series of downloadable files related to the convicted sex ...

• Documents related to the investigation into Jeffrey Epstein were released today on the Justice Department’s website. They include never-before-released photographs of former President Bill Clinton ...

Abstract: Simultaneous Localization and Mapping (SLAM) is considered to be a fundamental capability for intelligent mobile robots. Over the past decades, many impressed SLAM systems have been ...