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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PDFs remain a common way to share documents because they preserve formatting across devices and platforms. Sometimes, however, you end up with several separate PDFs that would be easier to handle as a ...

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Leo S. Sejda, a man of uncommon strength, unwavering integrity, and a boundless heart, passed away on July 23, 2024, leaving behind a legacy built not on words, but on action. Guided throughout his ...

Dennis passed away on May 31, 2025. Born in Hammond Indiana on May 7, 1947, Dennis served honorably in the U.S. Army during the Viet Nam War era. He was a member of the Hollywood (FL) Police ...

PDF editors are essential tools used across all professions, academic levels, and diverse backgrounds. In 2025, several free PDF editors stand out due to their powerful features and user-friendly ...