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Finland Announces an Anti-Laser Campaign For Air Traffic

K. S. Kyosuke Re:convex lens (56 comments)

It's significantly diverging primarily because of the laws of physics. Even "perfect" optics wouldn't help because you can't simultaneously have a small aperture and a low-divergence beam. And I'm acutely aware that increasing its divergence only exacerbates the problem, that's why I concluded some time ago that it's a dumb thing to do.

about half an hour ago
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Can Rep. John Culberson Save NASA's Space Exploration Program?

K. S. Kyosuke Re:Big bags of water... that's what we are. (113 comments)

And what are people in space thinking about?

If they were closer to Mars, for example (dug into Phobos?), they'd be able to make real time control decisions for the martian roving vehicles, vastly improving their utilization. Speed of light is horrible for efficient operation of such devices. Some progressive Martian mission designs anticipate this scenario.

2 hours ago
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Finland Announces an Anti-Laser Campaign For Air Traffic

K. S. Kyosuke Re:convex lens (56 comments)

So could powerful flashlights and astronomical telescopes, considering that you could put them together and use the telescope in reverse.

2 hours ago
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Finland Announces an Anti-Laser Campaign For Air Traffic

K. S. Kyosuke Re:convex lens (56 comments)

How many people have a legitimate use for a laser that can maintain a pencil-sized beam at a couple of miles?

Fortunately, thanks to the laws of physics, such a laser would have to have an aperture of at least 10 to 20 cm, but probably much more, and thus would be very conspicuous.

2 hours ago
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Finland Announces an Anti-Laser Campaign For Air Traffic

K. S. Kyosuke Re:convex lens (56 comments)

Of course they do. Without a lens, a laser diode's beam would so divergent as to be unusable for most applications.

3 hours ago
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Finland Announces an Anti-Laser Campaign For Air Traffic

K. S. Kyosuke Re:convex lens (56 comments)

They already have it.

3 hours ago
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Can Rep. John Culberson Save NASA's Space Exploration Program?

K. S. Kyosuke Re:I don't care about NASA (113 comments)

I sincerely doubt that Space X would create science only missions - like sending probes to Mars or the outer reaches of the Solar System.

No, but they could enable them with their cheap technology. Think of how cheaper the MSL rover could be if if were launched by a Falcon Heavy. All that weight-shedding typical for aerospace can't possibly be cheap. But we won't have any chance to substantially get rid of it until we get cheaper launches. (New Horizons probably could have been much more heavyweight, too, if FH had been available at that time.)

3 hours ago
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Can Rep. John Culberson Save NASA's Space Exploration Program?

K. S. Kyosuke Re:I don't care about NASA (113 comments)

Is that an argument against NASA buying cost-effective services from SpaceX?

4 hours ago
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Cyberattack On German Steel Factory Causes 'Massive Damage'

K. S. Kyosuke Re:yeah right (186 comments)

No, an engineer, among other things, is a person in charge of a steam engine. It just so happens that some trains happen to use a steam engine, too.

4 hours ago
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Cyberattack On German Steel Factory Causes 'Massive Damage'

K. S. Kyosuke Re:yeah right (186 comments)

to engineer, v.: 2.b fig. To arrange, contrive, plan, superintend. Also (U.S.), to guide or carry through a measure or enterprise; to manuvre, (occas.) to ‘shepherd’.

4 hours ago
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What Happens To Society When Robots Replace Workers?

K. S. Kyosuke Re:Old (541 comments)

The "knowledge economy" is dud before it got off the ground.

I would have thought that full automation is a demonstration that the exact opposite is true?

yesterday
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Calculus Textbook Author James Stewart Has Died

K. S. Kyosuke Re:PUSKUNOV is the best (166 comments)

Well, you'll have to scribble them again. ;-)

yesterday
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Calculus Textbook Author James Stewart Has Died

K. S. Kyosuke Re:$32 million of greed. (166 comments)

Pity that people can't self-publish these days...

Oh, wait!

2 days ago
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NASA Video Shows What It's Like To Reenter the Earth's Atmosphere

K. S. Kyosuke Re:Parachute Reefing (73 comments)

And apparently, you survived!

2 days ago
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Kepler Makes First Exoplanet Discovery After Mission Reboot

K. S. Kyosuke Re:Why do these reaction wheels keep failing? (27 comments)

All you're saying is true, but I think we've had enough problems with space-based moving parts (the assorted reaction wheels, Voyager 1 and 2 scan platforms etc.) compared to non-moving parts that finding a reasonable solution to this problem seems like something that everyone could benefit from. If a number of long-distance scientific missions have all the components working with the exception of moving parts, it would appear that moving parts with long lifetimes are the next major problem to solve. Voyagers had problems early on. That made the scientific output from Voyager 2 diminished even before it got to Uranus and Neptune. It's not just about extended missions in some cases.

2 days ago
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Kepler Makes First Exoplanet Discovery After Mission Reboot

K. S. Kyosuke Re:Why do these reaction wheels keep failing? (27 comments)

For these missions, though, it's generally desirable for the vehicle to last as much as you can make it. Surely the average scientific return per day from Opportunity is much, much cheaper now that it's been operating for ten years than it would have been had it only worked for the originally planned ninety days.

2 days ago

Submissions

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Radio Contact Lost With Vostok Station

K. S. Kyosuke K. S. Kyosuke writes  |  more than 2 years ago

K. S. Kyosuke (729550) writes "Russian scientists at the Antarctic Vostok Station, who have been trying to dig into the liquid heart of Lake Vostok, have suddenly gone silent.

The conditions in the lake are presumed to be similar to those of Europa and Enceladus and there is a hope that previously unknown forms of life could have found a niche in this unusual environment. Despite having been warned that their drilling technology (using freon and kerosene to lubricate the bore hole) may not be up to the task of reaching the lake without harmful enviromental side-effects, the Russians have decided to go on with the drilling. They haven't been heard from for the past five days."
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HP releases AdvFS under GPL

K. S. Kyosuke K. S. Kyosuke writes  |  more than 6 years ago

K. S. Kyosuke (729550) writes "The battle for the "next-gen Linux file system" might have just become a little fiercer. Hewlett-Packard have just released their AdvFS file system under GPL. There is a press release on the HP web site, but the Wikipedia entry sports less PHB talk. The reaction of Sun and Oracle (each with their own advanced FS initiative, ZFS and Btrfs, respectively) to this might be interesting."
Link to Original Source

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