A 150-year-old rule in geometry has been proven wrong. Mathematicians found two different doughnut-shaped surfaces that look ...

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Abstract: This paper proposes a double reconfigurable intelligent surface (RIS)-assisted multi-user downlink communication network with two RISs deployed symmetrically about the base station (BS) for ...

Who hasn’t heard the sarcastic expression “It’s simpler than a rattle mechanism”? Well, simplicity is not a quality at odds ...

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