I agree on wanting to see these examples of new technology in action, Nadine. If these technologies meet their PR promises, they could make some very positive changes. I expect that many of the new technologies we're seeing on the Design News site will find positive real-world applications.
jhankwitz, I made a similar comment on a different blog just a while back. Whar we don't know is how much the floor actually deflects, which would be the major way that dancers would observe the energy being captured. If the deflectio is very small, say less than 0.025 inches, or so, probably it would just be taken as a slightly cusioned floor. But if the flex were a lot more, say 0.125 inches, then it would certainly be quite obvious and it would feel like a drag. So what we need is more information. And while it may work very well in dry weather, it is not so clear how the sidewalk would survive in our slushy salty southeastern Michigan winters. Of course, any energy capyture mechanism does need to last a while, so durability really matters.
The more energy captured, the more energy needed to be provided by the dancers. Yes, they could make it a very stiff floor, but they would capture very little energy. So, it becomes a matter of how much extra energy dancers are willing to provide. It will be hard to balance the two to get maximum return on investment.
We still have no information on how much the floor deflects, without knowing that there is no way to make a valid evaluation. A half millimeter deflection would not be noticed, but a 2 or 3 mm deflection would attract a lot of attention. Possibly we could calculate the deflection needed to deliver the power claimed, except that we have no information about how much energy the dancers deliver to the floor, nor do we know anything about the efficiency of the capture mechanism. Without any information the very best we can do is to offer blind opinions, which, if we do that, we need to qualify them as blind opinions. That keeps us from looking foolish when the facts become available.
Concerning the dance floor... this might be a great thing when getting some exercise is whole the point of the dance... or whatever other activity could be performed on the floor. Imagine the power that is expended doing aerobics every year.
So, there might be a market in the health spa/gym business for these floors, as well as for a few other person powered generators... Stationary bikes, steppers, even lift machines could all be designed to convert the spa members' output into usable electricity, though I'm not sure that it would be cost effective.
But it might make an interesting marketing scheme... 'The Power House Gym' or 'The Green Room Spa' and like that.
I beleive the concept of green car is removal of pollution and its an hybrid car .I am too very excited to watch the unmanned vehicle because i have also designed an unmanned vehicle which moves towards the desired location after receiving the address interms of latitute and longitude.Sonaar can be added to it for obstacle detection
Jhankwitz its true in order to generate more energy the more energy needed to be provided by the dancers,It is a rule you dont get anything free of cost .Havent toy heard newtons law To every action there is equal but opposite reaction