mchouza

8 ms·

31.
by mchouza 15y ago
All plutonium isotopes can be used to make nuclear weapons [1], though Pu-238 would give big problems to weapon designers due to its intense decay heat. [1] http://cstsp.aaas.org/files/selden.pdf
32.
by mchouza 15y ago
Fast-moving people will also be Lorentz contracted, so there will be plenty of room... if there's enough energy.
33.
by mchouza 15y ago
He works at Relic: http://twitter.com/#!/kenpex
34.
by mchouza 15y ago
Additional evidence is provided by gravitational lensing observations, the most spectacular of which is the Bullet Cluster: http://apod.nasa.gov/apod/ap060824.html
35.
by mchouza 15y ago
It must be some protection against code injection. Here is the link in a different format, avoiding the explicit single quote: http://en.wikipedia.org/wiki/Baumol%27s_cost_disease
36.
by mchouza 15y ago
I would not say that NIF is a scam, as they are quite open about their priorities: https://lasers.llnl.gov/about/missions/
37.
by mchouza 16y ago
Apparently, a significant background of 10^19 eV neutrinos is expected: http://web.phys.ntnu.no/~mika/taup.pdf
38.
by mchouza 16y ago
Are you sure the presence of plutonium indicates a containment breach at a reactor? Remember that the fuel at the reactor 4 SFP is probably damaged and was sprayed with water.
39.
by mchouza 16y ago
I'm no "atomic troll" and radioactive contamination at Fukushima is potentially a significant problem. But the detected plutonium levels are almost insignificant compared to the detected Cs-137 contamination (whose half-life is 30 years, no
40.
by mchouza 16y ago
Quantum algorithms halve the "strength in bits" of symmetric encryption algorithms by using the Grover's search algorithm (AFAIK): http://en.wikipedia.org/wiki/Quantum_computer#Potential
41.
by mchouza 16y ago
Please read carefully before making absurd accusations. I said: "even an infinite amount of unmoderated natural uranium cannot sustain a chain reaction". The nuclear excursion at Chernobyl occurred in a graphite-moderated reactor core.
42.
by mchouza 16y ago
Each reactor core holds over 100 tons of uranium, of which about 3-5 tons is U-235. Critical mass under perfect conditions is 50 kilograms. Critical masses don't work that way: the additional U-238 absorbs neutrons making more difficult t
43.
by mchouza 16y ago
Link: http://www.ioccc.org/2001/ (herrmann1 files)
44.
by mchouza 16y ago
An interesting animation about this topic by John Weldon: http://www.youtube.com/watch?v=pdxucpPq6Lc
45.
by mchouza 16y ago
There is an analysis of the detectability of human radio signals at: http://www.faqs.org/faqs/astronomy/faq/part6/section-12.html The main uncertainty is at estimating the level of radio technology that can be available to alien civilizat
46.
by mchouza 16y ago
It's more complex than that: http://lptms.u-psud.fr/membres/trizac/Ens/L3FIP/Ice.pdf Even an extremely high pressure cannot melt ice at -25 °C, but skiing is still possible at that temperature.
47.
by mchouza 16y ago
It has some meaning. It's hotter than any positive temperature: http://en.wikipedia.org/wiki/Negative_temperature :-D
48.
Ralph Merkle: Publishing a new idea(merkle.com)
4 points by mchouza 16y ago|0 comments
49.
by mchouza 16y ago
An interesting project that is developing an updated version of this idea is Metamath: http://us.metamath.org/index.html
50.
by mchouza 16y ago
I believe that the preprint is at: http://arxiv.org/abs/1007.4088
51.
by mchouza 16y ago
If the original input is not very short, it's extremely unlikely that an input with the same SHA-1 hash could be found. These attacks work because the passwords are weak and SHA-1 is fast to compute, not due to any weakness of SHA-1 as a
52.
by mchouza 16y ago
Wrong, and many well respected economists will tell you you're wrong. Yes and other well respected economists (at least at the time) told that we were in a "Great Moderation": http://en.wikipedia.org/wiki/The_Great_Moderation
53.
by mchouza 16y ago
A commenter says it's at Changsha: http://maps.google.com/maps?f=q&source=s_q&hl=en&#38...
54.
by mchouza 16y ago
The bot has a Twitter account: http://twitter.com/trademe_xkcd576
55.
by mchouza 16y ago
As evidence that the costs are worth the benefits I submit the fact that you (perhaps not you in particular but any citizen of a country who makes this claim) haven't renounced your citizenship for that of another, better cost-benefit rati
56.
by mchouza 16y ago
It's similar to how FriendFeed uses (used?) MySQL: http://bret.appspot.com/entry/how-friendfeed-uses-mysql
57.
by mchouza 16y ago
Well... we can just check if it's nonzero. They didn't say real power of 2. :-)
58.
Fortune 500 Founding Decades (see figure 2)(gathr.me)
1 points by mchouza 16y ago|0 comments
59.
by mchouza 16y ago
An histogram with the founding decades of the 2009 Fortune 500 is in this article: http://www.gathr.me/the-economic-future-just-happened.pdf (figure 2).
60.
Rescuers pull all 33 miners to safety(nytimes.com)
59 points by mchouza 16y ago|19 comments

More ›