As if having sadistic TSA agents at the security checkpoint rummage through our carry-on bags and peering through our clothes using backscatter x-ray machines at the airport was not enough, too often we are served up this little treat aloft.
Test & Measurement World's Martin Rowe has come up with yet another Top 16 dB hit, "Below a Gigahertz." It asks the question, "Remember when 50-MHz clock signals were state-of-the-art?"
Someone made a circuit that drives the X-Y-Z axes of an oscilloscope to generate an analog clock - quite the Lissajous figure!
Straight out of sci-fi, this Active Denial System uses directed microwaves to make the perps feel like their skin is on fire, while not causing any damage (skin penetration is only 1/64"). See videos at bottom of page. AP reporter Elliot Minor volunteers.
OK, maybe it is as bad as being forced to watch home movies, but here is a short clip of my e-powered RC airplane. Here is a clip of the ESC waveform for the brushless motor.
The concept of a Space Elevator has been around for a while, but inept materials technology made it unachievable. Carbon nanotube advances are about to change that. Here is a clip of a contest held for the first competition for working climbing platforms.
Help Put a 'New Face' on Engineering in 90 Seconds; 'How Engineers Make a World of Difference.' IEEE-USA Online Video Scholarship Competition - $10,000 in total prizes. Due date Friday, January 18, 2008.
Here is a case of extreme resonance with constructive interference that is destructive. This man breaks a glass with voice. The fatal "blow" is 566 Hz at 105 decibels.
Electromagnetic field simulation of cell phone near human head. It gives you that warm, fuzzy feeling - or is that the microwaves? Courtesy Technische Universitat Darmstadt.