>"All electronic devices send out eletromagnetic waves. so does your monitor. and your monitor does it all the time. and at very high frequencies. high enough f

>"All electronic devices send out eletromagnetic waves. so does your monitor. and your monitor does it all the time. and at very high frequencies. high enough for your short wave AM radio. all you have to do is display the "correct" image on your screen and your monitor will emit the "right" signals. Tempest for Eliza displays pictures on your screen. one for each note in the song." This is interesting from a "dimensional expansion"/"dimensional collapse" perspective. In other words, we have a computer monitor. The screen, more specifically images on the screen -- are 2D entities. Radio waves, on the other hand, could be considered 1D, or even 0D (time domain oscillations only), depending on one's perspective... So, if what the article says works, we have this mapping of a specific patterned 2D screen image -- which maps to a note (a human hearable frequency) mapped to a much higher frequency 1D or 0D entity (the AM radio wave). Anytime an apparent one-way mapping can be spotted -- I like to imagine if it could be reversed, and if so, what might be required to do that... Reversed, this looks like a 0D/1D radio wave generating a 2D screen. Well, we already have something like that... that's basically streaming YouTube videos over WiFi (2D screens gettting generated from 1D/0D information)... but that's still with an encoding method, compression, computer intervention, etc. Perhaps there is something more fundamental there... Old-time analog TV's used a radio (well, rf/electromagnetic spectrum, whether you call it "radio" or VHF or UHF or not...) signal only to create their 2D pictures without encoding or decoding, without computer intervention. But, I don't know. I think the whole idea of converting something in several dimensions to something in lesser dimensions, and then converting it back again -- has a whole lot of merits and applications -- thus far we've "discovered" TV and Computers and moving pictures of all sorts -- what potential applications will we find for this set of ideas in the future?