WHILE experimenting with the photophone it occurred to me that the fact that the resistance of crystalline selenium varies with the intensity of the light falling upon it might be applied in the ...

E. Whitney. "The sound system was R.C.A. Photophone ‘High Fidelity’," said Clive. "The stage was fully equipped with footlights, battens and all wired for three colours controlled by a ...

DeepSeek, a Chinese AI startup founded in 2023, has taken the internet by storm this week with its precision, speed, and mystery. Still ranking among the top free apps on Apple's App Store ...