The stylus would receive the magnetic signal, which could then be decoded back as coordinate information.

The difference between the electric and the magnetic signals:

The students working on the project are hoping that the detection of magnetic signals may have value in showing the onset of an earthquake.

The researchers said the technology could work 10,000 times faster than today's hard disk drives, which store data as magnetic signals on spinning disks.

The use of inductive magnetic signal should studied in order to confirm its safety.

On the second pass, the magnetic signal is extracted.

Steel can alter performance, but steel can actually enhance a magnetic signal.

Ordinary tapes are used for analog recording, where music is recorded in a smooth, continuous pattern of magnetic signals.

Instead of recording magnetic signals on tape, these camcorders burn video information directly onto small discs.

People could not prove that the extremely faint magnetic signals they were measuring came from their animals, he said.