EVANSTON, Ill. --- For more than 15 years, carbon nanotubes (CNTs) have been the flagship material of nanotechnology. Researchers have conceived applications...
CNT is strong theoretically. When lattice defects found in the real world are included the theoretical numbers drop to a small fraction of the original values....
A key point of the article is that the measured result is in agreement with theory. Also the article suggests that an approach based on electron beam methods...
From http://www.nss.org/news/releases/pr20080909.html First-of-a-Kind Long-Distance Demonstration of Solar-Powered Wireless Power Transmission Technology What:...
Hi All, JP Aerospace was privileged to take part in this episode. We built and flew all of the high altitude solar experiments as well as shot all the HD video...
John, what kind of efficiency was achieved? Every vision is a joke until the first man accomplishes it; once realized, it becomes commonplace. ~Robert...
John, congratulations, that's great you were involved. I attended the press conference this morning and have a bunch of notes, if you have any questions about...
I was pleasantly surprised at the results. The entire set up appeared to be sort of a jerry-rigged affair. A mile from the transmitter the team measured...
Craig, You obviously know alot about this. Can you explain beam bifurcation? Why are they measureing in decibells and not watts? Why did they say they hit...
I was rather disappointed in the show. I suspect it was made to impress people who aren't very technical, and if it does that it's probably a good thing....
I think the sunshield episode before it was almost more interesting in two respects: one, the idea of millions of small "optic cells" self-assembling...
The use of Fresnel lenses and the need for multi-layered cells made no sense to me either. There is plenty of room in space for the solar cells. ... They...
... I noticed that they said it would be a few decades before the coil gun was ready for such an application. If so, I suppose that it will be a while before...
i think you get an 8 to 1 light concentration with the fresnel lens, couple that with the 5 to 1 higher concentration of sunlight in space vs the ground and...
If I had to guess which would come first, the coil gun or the stationary space tether, I would guess the coil gun. But if we actually had crash projects to do...
The mass of the lens was a little less than 1/32 of that of the cell. The point was to test it in the real world not just in the lab. Many people believe that...
Tony: The Fresnel lenses do NOT decrease the area of the solar panels, only the area of the cells under the lenses. The area of the complete panel stays the...
Dave the point is you need eight times LESS solar cell area for a given amount of power ... From: Dave <symmetric@...> Subject: [space-elevator] Re:...
Maybe we're talking across each other here. I agree there's less solar cell area, but do you not agree the Fresnel lens area is the same? Dave ... given...
fresnel lenses weigh less and are cheaper than triple junction solar cells per square unit of area. Every vision is a joke until the first man accomplishes...
From my understanding, most modern solar cell's output decays over time. I had assumed that was just from "wear" as they degraded under sunlight. If this is...
I suspect that foil diffraction gratings are even lighter. They can also deflect away the frequencies that the solar panel can't accept, which reduces...
... This may be less of a problem than one might think. If the phase of each element in the array is locked to a pilot beam transmitted from the receiver site,...
You guys are making me dizzy. There's too many references to relative sizes. Let's just say that the solar cell is the size it is. The surface area of the...
If a serious effort were made, I suspect a coil gun capable of launching payloads as heavy as the Shuttle can handle could be built within two decades. ...
Certainly running tests in environmental chambers and under laboratory conditions is precisely what would be done if a serious mission were to be under...
I thought it was cool too. Then I realized that we don't need automated lenses to shield the planet from sunlight. A cloud of "space stuff" could have the...
I like the idea large number of small satellites. Basically we are talking about a fleet satellites based microwave oven size magnetrons. A 1KW magnetron may...
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