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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, ...

Visitors will instead get free entry on President Trump’s birthday, which coincides with Flag Day. By Gabe Castro-Root The National Park Service will cut Martin Luther King’s Birthday and Juneteenth, ...

The Trump administration has removed Martin Luther King Jr. Day and Juneteenth from next year's calendar of entrance fee-free days for national parks and added President Trump's birthday to the list, ...

The Trump administration has changed which days Americans can visit national parks for free next year, removing Martin Luther King Jr. Day and Juneteenth and adding President Donald Trump’s birthday, ...

Free days at the U.S. National Parks have been changed to no longer include Martin Luther King Jr. Day and Juneteenth, just weeks after the Trump administration announced it would be raising fees for ...

In 2026, Americans will get free admission to national parks on President Donald Trump's birthday but no longer on Juneteenth and Martin Luther King Jr. Day, according to the National Park Service ...

Abstract: Many challenging real-world control problems require adaptation and learning in the presence of uncertainty. Examples of these challenging domains include aircraft adaptive control under ...