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Scientists Develop "Paint" To Help Cool the Planet

art6217 Re:In this house we obey the laws of thermodynamic (145 comments)

Look at this in another way: there is some planet with different objects placed on its surface, and these are well--isolated from each other. It would not be surprising, that each of these objects has a different temperature, would it? Because of e.g. its colour or its radiation surface. Now, let one of these objects be the air, and the other be some well--isolated, well--radiating building. Would not it be cool to put a thermodynamic engine in that building, in order to produce energy by reversing the greenhouse effect?

about three weeks ago
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Restoring Salmon To Their Original Habitat -- With a Cannon

art6217 Re:Pet Peeve (147 comments)

Charles Darwin, The Origin of Species:

When ducks suddenly emerge from a pond covered with duck-weed, I have twice seen these little plants adhering to their backs; and it has happened to me, in removing a little duck-weed from one aquarium to another, that I have unintentionally stocked the one with fresh-water shells from the other. But another agency is perhaps more effectual: I suspended the feet of a duck in an aquarium, where many ova of fresh-water shells were hatching; and I found that numbers of the extremely minute and just-hatched shells crawled on the feet, and clung to them so firmly that when taken out of the water they could not be jarred off, though at a somewhat more advanced age they would voluntarily drop off. These just-hatched molluscs, though aquatic in their nature, survived on the duck's feet, in damp air, from twelve to twenty hours; and in this length of time a duck or heron might fly at least six or seven hundred miles, and if blown across the sea to an oceanic island, or to any other distant point, would be sure to alight on a pool or rivulet.

about 3 months ago
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Dinosaurs May Have Been Neither Warm-blooded Nor Cold-Blooded

art6217 Birds (54 comments)

Sounds likely, if birds are their warm-blooded descendants.

about 6 months ago
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Google Unveils Project Tango 3D Tablet DevKit Powered By NVIDIA's Tegra K1

art6217 Re:1024 fits in 10 bits. (54 comments)

Did you consider upgrade?

about 6 months ago
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This 1981 BYTE Magazine Cover Explains Why We're So Bad At Tech Predictions

art6217 It is art (276 comments)

It is art, no prediction. It is obvious from the first glance. And the article confirms it:

If you're tempted to assume that the image was actually a serious depiction of what a future wrist computer might look like-well, no. Inside the magazine, which only had a brief editiorial about future computers, the editors pointed out that it wasn't a coincidence that it happened to be the April issue of Byte.

about 8 months ago
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Three New Exoplanets Seen In Direct Photographs

art6217 Surface features? (43 comments)

Is the shape of these dots representing merely the telescope's own artifacts? Will we be able to see clouds/continents of the largest exoplanets, if Phil Plait's prediction, that seeing Earth--sized planets is only a few years away, turns out to be true?

1 year,15 days
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Norwegian Town Using Sun-Tracking Mirrors To Light Up Dark Winter Days

art6217 Re:Why not a balloon (143 comments)

It had to be "the shape of a hat" -- i. e. with a flat mirroring surface on the bottom side, and with a gas container on the top side.

about a year ago
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Norwegian Town Using Sun-Tracking Mirrors To Light Up Dark Winter Days

art6217 Re:Why not a balloon (143 comments)

moving around

e.g. with a special, light harness, tied to three distant points on the surface.

about a year ago
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Norwegian Town Using Sun-Tracking Mirrors To Light Up Dark Winter Days

art6217 Re:Why not a balloon (143 comments)

a) to stabilize such a design in the air and

I guess that simply moving around/rotating around the vertical axis might be quite enough.

b) what happens if the wind goes

Fun! It would be mostly for fun anyway.

about a year ago
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Norwegian Town Using Sun-Tracking Mirrors To Light Up Dark Winter Days

art6217 Why not a balloon (143 comments)

Why not a ballon, of the size of a giant hat, make of a tinfoil? If would need to be tilted somewhat, and turn itself towards the sun -- easy in the case of a ballon. Would not it be much cheaper? Of course, tinfoil does not have the directionality of a glass mirror, but make the hat big enough and it would not be a problem, and even be a feature -- the more ambient light would not decrease the iris size so much, and thus a human would perceive the lighted area as even more bright.

about a year ago
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Mars Explorers Face Huge Radiation Problem

art6217 Oases of magnetism (283 comments)

http://www.universetoday.com/30538/was-mars-magnetic-field-blasted-away/

What is the protection at 180E60S, if compared to Earth?

about a year and a half ago
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Nearby Solar System Looks Like Home

art6217 Re:Titius-Bode law (62 comments)

This is not only about fitting a random formula. A set of such formulas would give more information on the rule in question:

  • is this just an exponential fit?
  • or is this an exponential fit i_1 + i_2 * i_3^m, that tends to contain small integers i_j?
  • or does it tend to be exactly an exponential fit a = 4 + 3 * 2^m?

about 2 years ago
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Nearby Solar System Looks Like Home

art6217 Re:Titius-Bode law (62 comments)

In particular, is there some known planetary system, where the rule is expressed using low integers, like 4 + 3 * 2^m in the case of Solar System, and not just by any exponential fit?

about 2 years ago
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Nearby Solar System Looks Like Home

art6217 Titius-Bode law (62 comments)

I wonder, if the inner planets of some other systems follow that hypothesis as closely as in the case of the Solar System. Is there any data already about that?

about 2 years ago
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Scientists Develop Chocolate That Won't Melt At High Temperatures

art6217 It may actually be more delicious if in the Arctic (161 comments)

They say, that their chocolate is going to be good even if it does not melt, as opposed to a "normal chocolate". As chocolate in general does not melt easily on very cold days and thus has taste problems, then perhaps their chocolate will actually taste better in the winter.

about 2 years ago
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Scientists Develop Chocolate That Won't Melt At High Temperatures

art6217 A gooey surprise... (161 comments)

...is when I try to eat a frozen chocolate on a winter day. It tastes like goo. Can it be, because it does not melt?

about 2 years ago
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Researchers Create New Cheap, Shatterproof, Plastic Light Bulbs

art6217 Re:I am having a vision of the future... (296 comments)

Pehaps they'll miss the unnatural yellow tint CFLs give, to save on the inefficient red phospor (some of the CFLs with the best light are B on the efficiency scale, because they contain balanced amounts of yellow and red).

More seriously, traditional bulbs give off warmth, which some people understandably like, especially in colder climates. And modern halogens are C on the efficiency scale, not bad given their sun--like light. The trick is to use a special glass cover that returns some of the infra--red band back to the tungsten.

about 2 years ago
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Hairspray Could Help Us Find Advanced Alien Civilizations

art6217 Re:Inverse square law destroy your argument (211 comments)

Have you ever did any involved mathematical analysis of detecting a slowly drifting 50Hz signal in a background stronger by hundreds of dB? I did not. This is why I would not say "all noise". I just do not know that. Do you?

about 2 years ago
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Hairspray Could Help Us Find Advanced Alien Civilizations

art6217 Re:Max Tegmark at MIT says no aliens exist... (211 comments)

Do you think that searching for various traits of a planet, for which no known explanation exists, becomes useless just because there is no life on the planet?

about 2 years ago
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Hairspray Could Help Us Find Advanced Alien Civilizations

art6217 I'd pick streetlighting (211 comments)

gigawatts of radio waves put into space: check
at a wavelength interesting to astronomers: check
low--frequency modulation, common phase: check (think Fourier analysis over months of data to filter out unmodulated light of a nearby star)
characteristic spectral fingerprint of artificial light: check
not limited to a civilisation's "radio window": check

about 2 years ago

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