Sometimes the best option is free.

The white T-shirt will come to define our era in the way that, say, a hopsack tunic characterises the Middle Ages, or a doublet acts as shorthand for Tudor and Elizabethan times. It goes with jeans, ...

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 ...