I think all criminals everywhere should have to work off the expense of their incarceration. If pedaling to generate power is useful to the community, then they should be alloted a power/day routine. Besides, exhausted criminals are much less likely to get into further mischief in prison. Plus who knows, it may turn out to be a great training plan for future Tour de France contestants.
All power to the cleaver people of Brazil, make them pay for their crimes to society!
If there was a method to improve on efficiency, it would be great to use at home, but let be realistic. For home use I see no major impact to our large energy footprint. A typical household may use 50 to 100 KWhr per day, so I do not see the human gerbil experiment replacing the city power grid ;-)
Lighting is a practical use, given the improvements of LED efficiency, however they may other practical uses for remote and rural areas.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.