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Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...

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Learn everyday expressions and idioms in 'The English We Speak'. test yourself with 'Phrase Frenzy', and learn more about English idioms in 'We Say - You Say' and 'This is Where'.

The Holocaust was the systematic, state-sponsored persecution and murder of six million Jews by the Nazi regime and its allies and collaborators. Learn more in the Museum’s Holocaust Encyclopedia.