"We have explored various methods, ranging from radio frequency energy harvesting to solar power, " he told BBC News.
An ablation sends radio frequency energy into the part of the heart that is causing the irregular heartbeat and kills the cells that cause the problem.
The Federal Communications Commission limits cell phone radio frequency energy emissions, called the specific absorption rate (SAR), at 1.6 watts per kilogram, as measured over one gram of tissue.
CNN: Scientists debate possible cell phone link to brain cancer
McDonald was also the third physician in the world to perform a procedure called conductive keratoplasty -- a noninvasive surgery for farsightedness that involves using radio-frequency energy to heat small spots around the cornea.
The energy generators and frequency regulators they work with must be of a certain size.
The trick is to tune the crystal, by modifying the details of pattern, so that as much of the emitted energy as possible is at the frequency most efficiently captured by indium gallium arsenide.
For example, rather than purchase expensive ultra-efficient motors, low cost opportunistic additions to old fans and pumps such as variable frequency drives and demand controls can deliver equal energy savings at a fraction of the cost.
FORBES: Log Baby Log: The Race to The Big New Resource Play You Haven't Heard Of
The New York Independent System Operator has defined short-term energy storage devices like flywheels and batteries as frequency regulators, allowing them to participate in regulated markets.
To be able to offer frequency regulation service to the grid, cars need a bidirectional power system, so energy can flow both from the grid and to the grid, and software to allow the car to communicate with the grid.
Grid Friendly Appliance Controller: Developed at the Pacific Northwest energy Laboratory, the Grid Friendly Appliance controller senses grid conditions by monitoring the frequency of the system and provides automatic demand response in times of disruption.
应用推荐