Abstract: In this letter, a phase synthesis method for mechanical beam scanning based on the feed displacement technique (FDT) is proposed for reflectarray antennas. To verify the correctness of the ...

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just don't have the ability to scale to useful interstellar speeds." Most theoretical studies on "beam riders" for interstellar travel have focused on laser beams, which are composed of particles ...

The car rides on plastic, screw-mounted 100-ton Barber S-2 roller-bearing trucks with raised foundry data, separate brake beam detail ... The Rapido HO scale mechanical refrigerator car uses ...

(i) The relevant distance of diffusion is the one that the molecules and radicals can reach during beam-on. In absence of radiation, the reactive chemical species are rapidly removed by antioxidants ...

The idea of traveling through interstellar space using spacecraft propelled by ultrathin sails may sound like the stuff of sci-fi novels. But in fact, a program started in 2016 by Stephen Hawking and ...

Caltech scientists are developing laser-driven lightsails that could push spacecraft beyond our solar system. Their research ...

After hours: February 7 at 7:31:11 PM EST Loading Chart for BEEM ...

The best mechanical keyboards will elevate your typing experience. With the right keyboard switches, you can type faster, more accurately and more comfortably than a standard membrane keyboard.