Is there a connection between artificial electromagnetism and cancer? And if so, how do we minimize risk?

Sometimes the scanner at a cash register rings up an item twice. If we convert to QR code tags, and instead of giving a product type a code, we give each item off the shelf a code, this can solve the double scan problem.

non visual wavelength photonics for day time stellar positioning (navigation) system

vision correction without distortion (perceived as curved space)

When an airplane touches down on the runway, a plume of smoke is emitted as the tread burns until the wheels catch up with the speed of the runway. If we can spin the wheels with an actuator before touchdown, we will reduce tire replacement costs for the airline industry.

Wireless headphone with low enough latency that the delay is not perceptable (applications include musical instrument amplifiers, television with headphones).

If a traffic light has a green arrow next to a light that is red, a driver with low attention could mistake the straight lane for having a green light.

Octave specific guitar amplifier

Sensitive microphone with heavy amplifier
before high resolution quantizer for low volume
hardware software Shazam style application.

Require train companies to post train schedules to integrate with Google and Apple GPS to reroute around train crossings.