Engineering

Monitoring electromagnetic signals in the brain with MRI

Researchers commonly study brain function by monitoring two types of electromagnetism—electric fields and light. However, most methods for measuring these phenomena in the brain are very invasive.

Engineering

Engineers configure RFID tags to work as sensors

These days, many retailers and manufacturers are tracking their products using RFID, or radio-frequency identification tags. Often, these tags come in the form of paper-based labels outfitted with a simple antenna and memory ...

Engineering

Wireless system can power devices inside the body

MIT researchers, working with scientists from Brigham and Women's Hospital, have developed a new way to power and communicate with devices implanted deep within the human body. Such devices could be used to deliver drugs, ...

Engineering

A way to monitor vital signs without touching patients

(Tech Xplore)—A pair of researchers at Cornell University has developed a new way to monitor vital signs in patients—one that does not require direct contact with the skin. In their paper published in the journal Nature ...

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Radio

Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, or phase. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.

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