Search found 34 matches

by vega12
Fri Sep 06, 2013 6:57 am UTC
Forum: News & Articles
Topic: US and UK intel 'have cracked online banking encryption'
Replies: 30
Views: 5657

Re: US and UK intel 'have cracked online banking encryption'

Here is another related, and much longer article about this topic: http://www.nytimes.com/2013/09/06/us/nsa-foils-much-internet-encryption.html?pagewanted=all It is amazing how much this program extends. I just hope this will spur groups to push for even more secure protocols. Although when they sim...
by vega12
Mon Feb 25, 2013 5:40 am UTC
Forum: Serious Business
Topic: Is it possible to have a rational debate on global warming?
Replies: 1714
Views: 319165

Re: Is it possible to have a rational debate on global warmi

Absorb as a sphere/emit as a sphere, you underestimate the temperatures. <= this is supposed to be right Absorb as a hemisphere/emit as a sphere, you get realistic temperatures. <= this is supposed to be wrong I was just passing through though, so forgive me if I am taking anything out of context. ...
by vega12
Fri Jul 13, 2012 1:05 am UTC
Forum: News & Articles
Topic: Hugs Bison detected at LHC
Replies: 43
Views: 12170

Re: Hugs Bison detected at LHC

But the boson itself has a mass of 126GeV/c2 does it not (I said MeV in my last post by mistake)? That rest mass energy still needs to come from somewhere. In quantum field theory, "forces" and the like are mediated by particles, but usually these particles are virtual. For instance, two ...
by vega12
Fri Feb 10, 2012 7:56 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1015: "Kerning"
Replies: 163
Views: 68115

Re: 1015: "Kerning"

If you don't know what kerning is, google it. The word kerning is kerned wider than the other text on the page Yeah I just noticed this too. It would seem that Google is probably doing that on purpose as a little in joke. Sort of like how Google searching "do a barrel roll" makes the brow...
by vega12
Fri Jul 08, 2011 4:11 pm UTC
Forum: Science
Topic: Shaking apartment
Replies: 5
Views: 3100

Re: Shaking apartment

Yeah, it's just due to being high above the ground as mentioned. For example, I live on a 12th floor of an apartment in Tokyo and can sometimes feel earthquakes that outside are almost imperceptible.
by vega12
Sat Feb 19, 2011 1:44 pm UTC
Forum: News & Articles
Topic: Over 1000 planets found, some Earth-sized, in habitable zone
Replies: 53
Views: 6075

Re: Over 1000 planets found, some Earth-sized, in habitable

Well, fire doesn't have heritable properties it passes on that can be acted on by natural selection, so I think in that sense it fails the criterion to be life.
by vega12
Wed Feb 16, 2011 3:10 am UTC
Forum: News & Articles
Topic: Supercompeter vs Humans in Jeopardy!
Replies: 125
Views: 12160

Re: Supercompeter vs Humans in Jeopardy!

Well, they could do some analysis of normal human reaction speed in the same situation, and use the statistics to generate a random delay at the start of the buzz-in time to make it's reaction time match that of a human. Given that Watson is able to get the questions right this often regardless is i...
by vega12
Sat Dec 11, 2010 4:48 pm UTC
Forum: Science
Topic: Atomic radius of ions vs elements
Replies: 16
Views: 2565

Re: Atomic radius of ions vs elements

The electrons also repel each other, so introducing a new electron would change the energy levels in such a way that the electrons would move a little bit further out to try to get further from each other (remembering that the charge of the nucleus is unchanged in this scenario). Also, you have to a...
by vega12
Sun Jan 10, 2010 12:41 pm UTC
Forum: Science
Topic: Artificial Intelligence
Replies: 25
Views: 2802

Re: Artificial Intelligence

Why shouldn't I still be allowed to use the term 'mystic' in a metaphorical sense? Scientists often use metaphor and personification to aid in understanding an idea. I can assure you that I'm not spiritual in any sense. And your statement doesn't contradict what my thoughts. Maybe it was a mistake f...
by vega12
Sun Jan 10, 2010 10:46 am UTC
Forum: Science
Topic: Artificial Intelligence
Replies: 25
Views: 2802

Re: Artificial Intelligence

Second, self-awareness is unknown realm. Quantum mechanics is counter-everyday realm. Therefore some non-regorous assumptions let me suggest that both are connected somehow. People throw the term 'self-awareness' around as if it's some weird mystical thing. Going simply by its definition, self-awar...
by vega12
Tue Dec 22, 2009 4:17 am UTC
Forum: Science
Topic: Motion in a straight line (Physics)
Replies: 28
Views: 3184

Re: Motion in a straight line (Physics)

Yes, but in order not to make a mistake in the future when the initial velocity is not zero, or taken at some other time t_0, it's important to point out that integrating the function from 0 to 5 (F(5) - F(0)), only gives you the difference in velocity (v(5) - v(0)). I like to think of it like this:...
by vega12
Mon Dec 21, 2009 5:19 am UTC
Forum: Science
Topic: The nature of gravity and spacetime
Replies: 19
Views: 2389

Re: The nature of gravity and spacetime

The relationship between matter, energy and gravity is very close. The matter tells space-time how to curve and space-time curvature tells matter where to go. Without the energy density or matter i.e without the balls on your sheet the space time would be flat. It you have only say a very light bal...
by vega12
Sun Dec 20, 2009 6:14 am UTC
Forum: Mathematics
Topic: Odd Way to Collapse a Number to 1
Replies: 5
Views: 1410

Re: Odd Way to Collapse a Number to 1

Thanks, but I actually found out what the problem is shortly after by doing some reading on the actual proper definition of primitive recursive. I was going under the notion that primitive recursive is, as defined in GEB, that which can be programmed using bounded loops. Now the well-definedness of ...
by vega12
Sun Dec 20, 2009 3:56 am UTC
Forum: Mathematics
Topic: Odd Way to Collapse a Number to 1
Replies: 5
Views: 1410

Re: Odd Way to Collapse a Number to 1

Ah, yes. I'm actually re-reading GEB right now, and just recently read the dialogue where the author introduces this pattern to the reader. He calls numbers which have said property 'wondrous', and ones that don't 'unwondrous' (arbitrary names). The reason for bringing them up is to use them as a co...
by vega12
Thu Dec 17, 2009 5:05 am UTC
Forum: Science
Topic: The nature of gravity and spacetime
Replies: 19
Views: 2389

Re: The nature of gravity and spacetime

(Inspired by xkcd#675) Okay, here comes the thought experiment that completely overturns general relativity with the 'ball on a rubber sheet' idea. It's very puzzling how an inanimate object can exert a force on something a million miles away, without changing energy levels anywhere. All it takes f...
by vega12
Thu Nov 12, 2009 7:26 am UTC
Forum: Mathematics
Topic: Distance between (0,0) and (1,1) = 1 for some path?
Replies: 44
Views: 5809

Re: Distance between (0,0) and (1,1) = 1 for some path?

Well, since it's a physics class you can't ignore the possibility that the professor is thinking about length contraction, where the answer would be to move in a straight line at a velocity such that the length contracts to 1.
by vega12
Sat Jul 18, 2009 5:35 pm UTC
Forum: Mathematics
Topic: Graphing X^X
Replies: 13
Views: 2330

Re: Graphing X^X

Also, consider the following for a fixed base of x: x^{-a/b} for positive integers a and b. This can be re-written: ({1/x^a})^{1/b} Now, if a is even, then x^a is positive, but if a is odd then it is negative. Now, if we assume that a and b are completely reduced, then we see that we don't a...
by vega12
Tue Jun 02, 2009 8:28 am UTC
Forum: Language/Linguistics
Topic: The most useful phrase to know: "Language Settings"
Replies: 24
Views: 3724

Re: The most useful phrase to know: "Language Settings"

Well, for Japanese just look for the word 言語 (gengo) somewhere, as that means language. If I look under control panel in Vista, for instance, the language options are under: 地域と言語のオプション (chiiki to gengo no opushon - Region and Language Options) Instead of オプション for "option", they might use...
by vega12
Thu Apr 09, 2009 9:12 am UTC
Forum: Mathematics
Topic: Complex Analysis
Replies: 8
Views: 1373

Re: Complex Analysis

Well, I don't think about it as extending sin and cos to the complex planes, but rather, the sin and cos we all learned in high school are just restrictions of the more natural complex definitions. Complex analysis may have weird, counter-intuitive results, but the math is way more elegant than real...
by vega12
Fri Mar 13, 2009 10:54 am UTC
Forum: Gaming
Topic: Starcraft!
Replies: 323
Views: 32170

Re: Starcraft!

If you're following the OSL, then the following is spoiler! I just watched fantasy beat Luxury in games 2 and 3 of the OSL quarterfinals. He used Valkyries in both games to melt Luxury's mutalisks. Game 3 in particular was a spectacular slaughter, as 30+ mutalisks went down to at least around 10...
by vega12
Mon Mar 09, 2009 3:41 am UTC
Forum: Gaming
Topic: Starcraft!
Replies: 323
Views: 32170

Re: Starcraft!

I think I agree with you, but it can make for some interesting builds/games if you chose to get some Valkyries as well. I've seen it a couple times only in pro games, so it definately isn't common, but I guess still experimented with at the top level. All I could find on YouTube was this funny video...
by vega12
Sun Mar 08, 2009 3:57 pm UTC
Forum: Gaming
Topic: Starcraft!
Replies: 323
Views: 32170

Re: Starcraft!

Yeah, but don't forget that when you have a control group of mutalisks harassing your base, 2 or 3 valkyries can really do heavy damage since the zerg player will usually have the mutas stacked for easy micro. Couple the valkyries with standard turrets and marines, and it can make life hard for the ...
by vega12
Thu Mar 05, 2009 5:46 am UTC
Forum: Gaming
Topic: Starcraft!
Replies: 323
Views: 32170

Re: Starcraft!

I rarely go to that much effort, Stim Pak is generally the last thing I research and I generally use Siege tanks for defense. I Generally just use one Science vessel to help out against tough units, and lockdown is pretty easy to manage if the assault is set out right. Which is admittedly difficult...
by vega12
Fri Jul 25, 2008 5:52 am UTC
Forum: Science
Topic: How does swinging oneself work?
Replies: 7
Views: 1776

Re: How does swinging oneself work?

Tucking your legs and arms in to spin faster has to do with conservation of angular momentum. Angular momentum is moment of inertia times angular velocity, so by tucking your arms and legs in, you decrease your moment of inertia, so the angular velocity increases. Figure skaters do this also to spin...
by vega12
Sat Jul 19, 2008 12:53 am UTC
Forum: Mathematics
Topic: Mathematicians on wikipedia display liberal bias
Replies: 35
Views: 6205

Re: Mathematicians on wikipedia display liberal bias

If Fermat's last theorem is false, it is refutable, since there would be a counterexample. The axiom of choice is consistent with the other axioms, so it can't be used to prove anything which can be refuted from the other axioms. (Assuming, of course, that ZF is consistent.) It could be undecideabl...
by vega12
Wed Jul 09, 2008 1:35 am UTC
Forum: Science
Topic: The Particle Zoo
Replies: 6
Views: 1562

Re: The Particle Zoo

The eyes and mouths for the anti-particles are also in inverse color :D.
I might have to buy a tau, muon, and gamma, because I've been working with them so much over the last year :P
by vega12
Wed Jul 09, 2008 1:12 am UTC
Forum: Science
Topic: Imaginary space solutions to the Shrodinger equation?
Replies: 6
Views: 1248

Re: Imaginary space solutions to the Shrodinger equation?

It has already been mentioned, but all vectors are complex valued. But one of the critical properties that make an operator correspond to an observable quantity, is that its eigenvalues (possible values that can be observed) are real. There are of course operators that have complex eigenvalues, but ...
by vega12
Wed Jul 09, 2008 1:08 am UTC
Forum: Science
Topic: Might gravity not be considered a force?
Replies: 28
Views: 3886

Re: Might gravity not be considered a force?

Well, really, since gravity isn't a force, you were actually under the influence of no force (air resistance, and other things ignored of course). It's those who are standing on the ground that are in an accelerating frame. The floor is constantly pushing them up, which causes their frame to be non...
by vega12
Mon Jul 07, 2008 11:20 pm UTC
Forum: Science
Topic: Might gravity not be considered a force?
Replies: 28
Views: 3886

Re: Might gravity not be considered a force?

The way I see it, gravity causes mass to accelerate. That's what I call a force. And I wrote my thesis in GR! "Help! Gravity is forcing us into that black hole!" "No it's not! It's just the geometry of spacetime" But again, that depends on the metric. Yes, in our standard Euclid...
by vega12
Fri Jul 04, 2008 6:56 pm UTC
Forum: Science
Topic: Might gravity not be considered a force?
Replies: 28
Views: 3886

Re: Might gravity not be considered a force?

Gravity isn't a force. All things move in straight lines (geodesics). However, masses distort space-time, and so what are straight lines in the metric (a way of measuring distances) of the universe, don't look straight to us :P. This is what general relativity says. As for how gravity is pulled into...
by vega12
Wed Jun 25, 2008 7:36 pm UTC
Forum: Science
Topic: Superluminal velocities
Replies: 14
Views: 2089

Re: Superluminal velocities

Check out my post above :P

Even if a light wave has phase velocity greater than c, the wavefront is still limited by c, since that is were information is stored. Similarly with any disturbance in the wave, it is limited by c.
by vega12
Tue Jun 24, 2008 6:08 am UTC
Forum: Science
Topic: Superluminal velocities
Replies: 14
Views: 2089

Re: Superluminal velocities

Even though light can go faster than c, it doesn't mean information is travelling faster than c. If you were to fire a light beam at a material with n < 1 (i.e. speed of light greater than c), then even though the phase velocity of the light is greater than c, no disturbance in the wave can travel f...
by vega12
Tue Jun 10, 2008 10:59 pm UTC
Forum: Language/Linguistics
Topic: Language Morphology Preference
Replies: 13
Views: 3535

Re: Language Morphology Preference

I think I like agglutinative language, as it seems to be a nice balance. Conjugations are typically regular, so easy to learn, and they use small grammatical affixes to give context to the parts of a sentence. In some ways, agglutinative sentences almost seem formulaic.
by vega12
Tue May 27, 2008 11:59 pm UTC
Forum: Science
Topic: Solution To Global Warming - Space as a vacuum cleaner
Replies: 11
Views: 1766

Re: Solution To Global Warming - Space as a vacuum cleaner

Also, I believe that would be a terrible waste of carbon. Why not work on ways of using the CO2 and whatnot to accomplish something useful while also decreasing the amount of greenhouse gas?

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