The SETI “WOW” signal comes from a computer printout of radio signals detected at the Big Ear Radio Observatory at Ohio State University in 1977. The strength and pattern of the signal sequence impressed researcher Jerry... More »

www.reference.com Science Physics Optics & Waves

The U.S. government does not have an official plan for what to do if we come in contact with extraterrestrial life, but an organization called the SETI (Search for Extraterrestrial Intelligence): Post-Detection Taskgroup... More »

Although there has been no known and verified contact with intelligent extraterrestrial life, some form of life may exist elsewhere in the universe, even if it isn't on a human level of development. Given the size of the... More »

www.reference.com World View Paranormal

Pulse position modulation, or PPM, is a signal modulation used for digital and analog transmissions. PPM is used mostly for optical communication systems such as fiber optic and infrared remotes, when efficiency is neede... More »

The Nyquist rate is the lowest rate at which a signal can be sampled without aliasing. It is equal to two times the highest frequency present in the signal. More »

To make a printable protractor, you need Internet access, a computer, a printer, durable printer paper or cardstock, and a pair of scissors. The process takes around 10 to 20 minutes to complete. More »

www.reference.com Math Geometry

If a TV has a VGA input port, then plugging a VGA cable into it allows it to send a computer video signal from the computer to the TV. Not all televisions have VGA ports on them. Instead, many have HDMI or other input po... More »