uvdiv

47 ms·

421.
by uvdiv 14y ago
There are a lot of new designs (i.e.: not BWR) that passively cool and shutdown without the input of any external energy. That's true of some new BWR designs as well: http://www.ne.doe.gov/np2010/pdfs/esbwrOverview.pdf Claims 72 hours o
422.
by uvdiv 14y ago
The worst case scenario of a natural disaster is also catastrophic, and they don't even have significant benefits. I, too, am opposed to natural disasters. (?)
423.
by uvdiv 14y ago
You've misread -- `stinos' isn't the one saying these things, he's quoting a Belgian journalist. He disclaimed that he doesn't know if these are accurate depictions and asked HN for comment.
424.
by uvdiv 14y ago
Even when it comes to the "pursuit of happiness," enshrined in our Declaration of Independence as one of the noble goals of government, our citizens are only the 15th most satisfied with their lives. The text asserts the right of men [man
425.
by uvdiv 14y ago
Who said anything about them using plutonium?
426.
by uvdiv 14y ago
Why? It's only a few percent larger delta-V: http://www.lr.tudelft.nl/index.php?id=29335&L=1 It's also much smaller -- this article puts the weight of the Mars orbiter at 500 kg total, vs. 1,380 for Chandrayaan-1. http://physicsworld
427.
by uvdiv 14y ago
RP-1 is kerosene, so by analogy with other petroleum fuels.
428.
by uvdiv 14y ago
The Atlas V which launched Curiosity weighs ~300 tons, which bounds its fuel cost at ~$300,000 (at $1/kg).
429.
by uvdiv 14y ago
Not true. Merely living together with your partner, if not legally married, can be a crime. E.g., punishable by 60 days in jail in Florida. http://articles.cnn.com/2011-09-01/us/florida.cohabitation.l...
430.
by uvdiv 14y ago
Well, what's the awk/sort version?
431.
by uvdiv 14y ago
You answered your own question: both satellites are in polar orbits. They pass the equator many times a day, but at a different longitude each time.
432.
by uvdiv 14y ago
For the record, an AI altered my post. My submitted title was "Rocket-powered moon lander crashes, explodes in test today".
433.
by uvdiv 14y ago
Two explosions are at 1:56 and 6:22. A smaller one is at 8:09. Story: http://www.reuters.com/article/2012/08/10/us-usa-nasa-accide... wiki: http://en.wikipedia.org/wiki/Project_Morpheus
434.
Morpheus lander first free flight and failure(youtube.com)
1 points by uvdiv 14y ago|2 comments
435.
by uvdiv 14y ago
The bandwidth to the orbiters is up to 2 Mbps, but because they're in low orbit they're only in sight 8 minutes per day. http://mars.jpl.nasa.gov/msl/mission/communicationwithearth/...
436.
Indian tribe's offline gambling monopoly: $1.1MM/year per member(nytimes.com)
2 points by uvdiv 14y ago|0 comments
437.
by uvdiv 14y ago
There's a prototype betavoltaic battery which can sustain 50 microwatts on 20 Curies of tritium [1] -- an efficiency of about 2%. Scaling linearly by 10^4, current technology could get 500 milliwatts on 200 kCi, or 20 grams, enough to charg
438.
by uvdiv 14y ago
That's worthless because it's contaminated with other isotopes of plutonium. Pure Pu-238 is made by irradiating Np-237, which comes from spent fuel but is already separated in very large amounts in the US. I think the main setback is fundin
439.
by uvdiv 14y ago
At least three unrelated "nuclear" things are involved: * Radioisotope power sources (like this, Cassini, New Horizons, etc.) * Critical fission reactors (popular in the early space race before solar PV, still the best option for high-power
440.
by uvdiv 14y ago
What's wrong with the economies of scale of larger nuclear plants? I'm asking curiously, I don't understand the fascination with home energy sources. Radioactive decay is a small energy source compared to fission. Look at the binding energi
441.
US Senators Force Weaker Safeguards Against Cyberattacks (nytimes.com)
2 points by uvdiv 14y ago|0 comments
442.
by uvdiv 14y ago
"(and none of those annoying "The TSA has recently blah blah blah blah" announcements over the PA)" Even in the midst of his panic, Winston was too much taken aback to be able to hold his tongue. 'You can turn it off!' he said. 'Yes,'
443.
by uvdiv 14y ago
I really like the accredited investor rules, it selects from a smaller pool of victims. And a wealthier pool of beneficiaries. Wonder why the 99% crowd isn't going after these: laws which explicitly discriminate against non-millionaires,
444.
by uvdiv 14y ago
I've heard that if you sign a contract under the threat of death that it is not legally binding. Now I know the doctors aren't making the threat, but I think the situation is remarkably similar, right? No, they're polar opposites. If I ho
445.
by uvdiv 14y ago
I actually think that first chart is the bad one. Inconsistent mixture of US/global, best/average. And inconsistent presentation -- why the single dot on "best wind farms/global average: 21%"?. The data should be visually grouped by energy
446.
by uvdiv 14y ago
I don't understand much but the Washington Post does: http://www.washingtonpost.com/business/technology/new-yahoo-... * $1 million/year in salary; * up to $2 million/year in bonuses; * $14 million in restricted stock & options vesting
447.
by uvdiv 14y ago
That's only the salary. " The estimated value of executive pay packages can also be calculated in dramatically different ways. After factoring in future grants of restricted stock and stock options due Mayer under her employment agreement,
448.
by uvdiv 14y ago
It's utterly incongruous reading Schmidt advocating personal privacy, anonymity, security of communication -- the same guy who's repeatedly on public record opposing these things. Like this: "I think judgment matters. If you have something
449.
by uvdiv 14y ago
In the tour video they show a stream of plasma directed at the 'waste' of interest. This has two effects, one it disassembles any molecular bond reducing complex (and perhaps toxic) substances into their base atomic components, That's re
450.
by uvdiv 14y ago
They spend 60 seconds charging 400 megajoules of capacitors, then they discharge them in a half-millisecond pulse. The peak electrical power is one terawatt. The laser compresses this pulse further, so that the light pulse is only 3 nanosec

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