Search found 396 matches

by SU3SU2U1
Wed Nov 26, 2014 7:14 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1450: "AI-Box Experiment"
Replies: 200
Views: 66796

Re: 1450: "AI-Box Experiment"

Could you prvide tangible examples where the two are different? I don't believe that has yet to be a useful distinction in AI. Umm... every AI book I've ever looked has a section on minimax, which is minimizing the loss in a worse case scenario. Usually minimizing the worst loss results in very dif...
by SU3SU2U1
Sun Nov 23, 2014 1:04 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1450: "AI-Box Experiment"
Replies: 200
Views: 66796

Re: 1450: "AI-Box Experiment"

Their proposed formalism is also pretty much impossible to code up. FYI, reading the paper will show that the text includes a link to a Haskell implementation here: https://github.com/machine-intelligence/provability This runs in realtime and the results are formally valid. The code is not much com...
by SU3SU2U1
Sat Nov 22, 2014 9:45 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1450: "AI-Box Experiment"
Replies: 200
Views: 66796

Re: 1450: "AI-Box Experiment"

I feel I need to correct an earlier mistake I made - due to order of changes in MediaWiki, the graph I posted of contributors to the RW LW page is in fact ... upside down. So what we're actually seeing is a page initially dominated by one person that lately got a more varied authorship. Huh. Well I...
by SU3SU2U1
Sat Nov 22, 2014 5:00 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1450: "AI-Box Experiment"
Replies: 200
Views: 66796

Re: 1450: "AI-Box Experiment"

I can't post a link to discussion elsewhere because that gets flagged as spam. Does somebody know how to correct this? Tl;dr a band of internet trolls that runs or took over RationalWiki made up around 90% of the Roko's Basilisk thing; the RationalWiki lies were repeated by bad Slate reporters who ...
by SU3SU2U1
Sat Sep 20, 2014 2:40 am UTC
Forum: Science
Topic: Fuck Dark Matter; It's a sprinkler, not a whirlpool.
Replies: 135
Views: 27173

Re: Fuck Dark Matter; It's a sprinkler, not a whirlpool.

So, to make sure I'm understanding correctly, an charged body in a purely-gravitational orbit shouldn't emit EM radiation then? This is not correct, in so far as its well posed. Radiation is frame dependent, but an observer at infinity will see radiation and the object will spiral in. An easier cas...
by SU3SU2U1
Thu Jul 24, 2014 10:22 pm UTC
Forum: Science
Topic: Computational modelling of fields
Replies: 8
Views: 2723

Re: Computational modelling of fields

You could start by writing a finite element method to do a Poisson's equation solver.
by SU3SU2U1
Tue Jun 17, 2014 11:07 pm UTC
Forum: Science
Topic: Something other than inverse squared
Replies: 13
Views: 3118

Re: Something other than inverse squared

Well for a conservative radial force, it has to be inverse squared. For other fields, no. Tides and magnetic fields are not inverse square and are also not conservative. This is not true, I think you mean 'divergence free', not conservative. A conservative forces has to have closed line integrals e...
by SU3SU2U1
Fri Jun 13, 2014 6:00 pm UTC
Forum: Science
Topic: Mark McCutcheon's Final Theory of Everything
Replies: 154
Views: 31587

Re: Wrong on the Internet: The Final Theory

Dismissing it because his attack on Newton was wrong simply delays the day when it will be taken seriously and properly debunked. Please see the end of my previous post, where I show that McCutcheon's theory is empirically disproven. His theory predicts that gravitational attraction will not follow...
by SU3SU2U1
Fri Jun 13, 2014 12:53 am UTC
Forum: Science
Topic: Alcubierre drive (Warp Drive)
Replies: 77
Views: 18511

Re: Alcubierre drive (Warp Drive)

As a former particle physicist, I like the definition of energy as "that quantity that is conserved when physical laws are time invariant." So, for instance, when I look at something like redshift in an expanding galaxy, I'd prefer to say that energy is obviously not conserved, because the...
by SU3SU2U1
Thu Jun 12, 2014 4:32 pm UTC
Forum: Science
Topic: Mark McCutcheon's Final Theory of Everything
Replies: 154
Views: 31587

Re: Wrong on the Internet: The Final Theory

I'll take another stab at this: That is a valid question. The way I see it is that he doesn't have a poor grasp of the current theories, so you should trust him - at least to the extent that he just might be presenting another way of looking at it. Lets continue on in chapter 1: McCutcheon introduce...
by SU3SU2U1
Thu Jun 12, 2014 7:23 am UTC
Forum: Science
Topic: Mark McCutcheon's Final Theory of Everything
Replies: 154
Views: 31587

Re: Mark McCutcheon's Final Theory of Everything

y question to these negative experts is simply, "What's the matter? Are you so bogged down in other issues that you don't have the time to spare Mr. McCutcheon some quality time?" Many years ago now, when I was a lecturer at a university (in physics) I asked McCutcheon for a review copy o...
by SU3SU2U1
Fri Jun 06, 2014 5:39 pm UTC
Forum: Science
Topic: Why do only some fields generate particles?
Replies: 19
Views: 3826

Re: Why do only some fields generate particles?

What do you mean that population density isn't "fundamentally discrete"? I said the EXCITATIONS you would expect in population density aren't fundamentally discrete. They might have dispersion because the underlying field is composed of discrete entities, but its a classical problem, not ...
by SU3SU2U1
Fri Jun 06, 2014 4:47 am UTC
Forum: Science
Topic: Why do only some fields generate particles?
Replies: 19
Views: 3826

Re: Why do only some fields generate particles?

In the case of two fans: All particles are self interactions, but not all self interactions are particles. I think there's basically always a particle solution to all self-interacting fields, but I don't have the math to show that. Also the particle's occurrence need not be common (as in the ring v...
by SU3SU2U1
Fri Jun 06, 2014 4:13 am UTC
Forum: Science
Topic: String Theory and the various interpretations of QM
Replies: 21
Views: 4348

Re: String Theory and the various interpretations of QM

All right, I'm going to get a tad technical. Generally we get to string theory by extending quantum field theory, which is itself a theoretical framework that you get by sticking special relativity together with quantum mechanics. Unfortunately, quantum field theory is "weird" in that a lo...
by SU3SU2U1
Thu May 15, 2014 4:06 pm UTC
Forum: Science
Topic: 1338 changed my life! (veganism)
Replies: 153
Views: 22874

Re: 1338 changed my life! (veganism)

Nevertheless: Pseudoscience is clearly better than no science since it at least gives some food for thought. No, thats not how this works. Psuedoscience is wrong, and in the case of your 200 g of avg protein (you'd have to eat 2000 calories OF JUST STEAK to get that high), its simply made up on the...
by SU3SU2U1
Sun May 11, 2014 5:39 pm UTC
Forum: Science
Topic: Help Feynman's Dad
Replies: 32
Views: 6368

Re: Help Feynman's Dad

Yeah, I mean I guess the point is becoming that I don't really know the rightful answer to this question which is sort of frustrating to me. I feel like I should at least be able to explain conceptually what's going on even if I don't know the math, but I definitely can't :-/ Pick up a good AMO tex...
by SU3SU2U1
Wed May 07, 2014 2:29 am UTC
Forum: Science
Topic: Help Feynman's Dad
Replies: 32
Views: 6368

Re: Help Feynman's Dad

You get into this formalism with creation and annihilation operators and the equations tell you that you discontinuously create particles into existence and destroy particles out of existence at certain times. So, I'd be careful here, I think you are running into a problem for the formalism you are...
by SU3SU2U1
Tue Apr 15, 2014 11:07 pm UTC
Forum: Science
Topic: 1338 changed my life! (veganism)
Replies: 153
Views: 22874

Re: 1338 changed my life! (veganism)

Regarding evolutionary changes since the dawn of agriculture:

Izawwlgood wrote:Such as? Aside from holding onto lactase longer?


Smaller heads/brains, more gracile skeletons, shorter teeth,etc.
by SU3SU2U1
Sun Apr 13, 2014 7:29 pm UTC
Forum: Science
Topic: 1338 changed my life! (veganism)
Replies: 153
Views: 22874

Re: 1338 changed my life! (veganism)

In the ancestral environment (hunter-gathering) meat made up the majority of calories consumed. We can see that in still extant hunter-gatherers like the san. Hunter-gatherer diets today have a huge variation. The inuit get > 90% of their calories from meat and fish, the !kung get < 15% of their ca...
by SU3SU2U1
Mon Apr 07, 2014 5:22 am UTC
Forum: Science
Topic: 1338 changed my life! (veganism)
Replies: 153
Views: 22874

Re: 1338 changed my life!

A comparison of their teeth, digestive system and even instincts with omnivores like bears shows quite significant differences and suggests otherwise. This doesn't hold up. Human's don't have fermenting vats like many herbivores, our molars and premolars resemble closely those of pigs (classic omni...
by SU3SU2U1
Tue Mar 18, 2014 12:10 am UTC
Forum: Science
Topic: Energy input for diamondoid nanomachines?
Replies: 5
Views: 2676

Re: Energy input for diamondoid nanomachines?

Have you read Drexler's work? It boils to down to "hey, this looks like it might be stable under the Schroedinger equation, and it sort looks like a macro-size object..." Almost all of his designs would oxidize like most reactive things do. He ignores chemistry and thermodynamics. The micr...
by SU3SU2U1
Sun Mar 16, 2014 8:20 pm UTC
Forum: Science
Topic: Energy input for diamondoid nanomachines?
Replies: 5
Views: 2676

Re: Energy input for diamondoid nanomachines?

The whole thing is pseudoscience. The founder, Drexler, is a crackpot himself.
by SU3SU2U1
Sun Jan 05, 2014 10:09 pm UTC
Forum: Science
Topic: Why do we perceive a 4-dimensional universe as 3?
Replies: 98
Views: 15846

Re: Why do we perceive a 4-dimensional universe as 3?

ow, there's one theory that states that there only is ONE electron in the universe, but we perceive many as it enters and leaves many many many times our three dimensional world. While elegant, it doesn't work. This theory would predict there are roughly as many positrons (electrons moving backward...
by SU3SU2U1
Sun Dec 08, 2013 4:12 am UTC
Forum: Science
Topic: Matter/Antimatter Symmetry--a tricksy proposal
Replies: 38
Views: 8275

Re: Matter/Antimatter Symmetry--a tricksy proposal

eternauta3k wrote:Can you do the same with spin? Localize SU(2) symmetry -> get some force out?


Spin is tied to Lorentz symmery. Gauge lorentz force and you get gravity (kind of, there are some wrinkles).
by SU3SU2U1
Fri Sep 20, 2013 3:59 pm UTC
Forum: Science
Topic: Amplituhedron
Replies: 2
Views: 3200

Re: Amplituhedron

This has actually been around for a few years now (although this is a heck of a marketing coup), but it only works for SUSY Yang-Mills theories, and it seems pretty clear that breaking SUSY and adding quarks that aren't paired with the gluons via SUSY will probably break the nice geometric regularit...
by SU3SU2U1
Thu Sep 05, 2013 2:37 am UTC
Forum: Fictional Science
Topic: Xero's Rule
Replies: 71
Views: 13209

Re: Xero's Rule

In all likelihood it would probably be relatively easy for an advanced alien civilization to enslave/kill/eat us and take our resources. They would then be able to use our resources in their own alien ways. But if they did take our resources then they would be greatly hindering their own progress. ...
by SU3SU2U1
Tue Aug 27, 2013 3:24 pm UTC
Forum: Science
Topic: Are ‘Evidence-based’ policies damaging policymaking?
Replies: 16
Views: 6906

Re: Are ‘Evidence-based’ policies damaging policymaking?

So I read the book linked to in the IEA article (its a quick read). The IEA is a think tank that takes the hard line that an unregulated market is the best market, and that government can only distort, never improve market outcomes. The book is a sort "meta" attack on the very idea that go...
by SU3SU2U1
Fri Aug 09, 2013 4:18 pm UTC
Forum: Science
Topic: There is only one* model consistent with CPT Symmetry
Replies: 129
Views: 39306

Re: There is only one* model consistent with CPT Symmetry

Treatid- even given your premise you have a problem- describing the CPT numbers of a particle isn't enough to fully describe it. In addition to CPT (essentially Lorentz symmetry) there are others (strong, weak/electro).
by SU3SU2U1
Thu Jun 20, 2013 6:09 am UTC
Forum: Science
Topic: Conservation of information
Replies: 13
Views: 5145

Re: Conservation of information

We have to be careful here. Information (in the information theory sense) increases with entropy. (i.e. entropy and information are measured in the same units, so higher entropy = higher information. Of course, we can always ask "which information is entropy measuring?" and the answer is p...
by SU3SU2U1
Thu Jun 06, 2013 5:59 am UTC
Forum: Science
Topic: Is Quantum Mechanics REALLY "Unintuitive?"
Replies: 32
Views: 10798

Re: Is Quantum Mechanics REALLY "Unintuitive?"

I think that QM is more mathematically intuitive than CM, in the sense that the laws just make more sense. Fields which are algebraically closed (e.g. complex numbers) make more sense than ones which aren't. I think maybe you just haven't seen the deeper formalisms of classical mechanics. Why is th...
by SU3SU2U1
Thu May 30, 2013 1:12 am UTC
Forum: Science
Topic: Do you believe in proton decay?
Replies: 25
Views: 10143

Re: Do you believe in proton decay?

Neutrino oscillations? Keep in mind that this depends very much on what you mean by standard model. I would use it to mean a collection of matter fields and SU3-SU2-U1 symmetry. In this framework, neutrino masses require no modification to the standard model- they are simply the first dimension 5 o...
by SU3SU2U1
Fri Apr 19, 2013 1:28 am UTC
Forum: Science
Topic: QED and Brain
Replies: 32
Views: 4654

Re: QED and Brain

This particular scientist disagrees. In practice, I make a big distinction between a hypothesis and a theory. So do all the scientists I've ever worked with. Sure, you can say one gradually shades into another. But blue gradually shades into green, yellow, orange, and red. Doesn't mean there's no p...
by SU3SU2U1
Tue Apr 16, 2013 7:42 pm UTC
Forum: Science
Topic: QED and Brain
Replies: 32
Views: 4654

Re: QED and Brain

Can people PLEASE get the hang of using theory/theoretical and hypothesis/hypothetical correctly?!!?! The difference between "theory/hypothesis" (and you can add law to that) is a convenient lie we tell students when teaching the scientific method. Its not really a distinction scientists ...
by SU3SU2U1
Tue Apr 02, 2013 7:46 am UTC
Forum: Science
Topic: Understanding the speed of light
Replies: 17
Views: 2807

Re: Understanding the speed of light

What exactly do you want to do? Remember, because of time dilation(or length contraction depending on the frame), an observer can travel pretty much arbitrarily far in their lifetime. So you can get too distant exotic planets simply by traveling at very high percentages of light speed. However, if t...
by SU3SU2U1
Mon Mar 25, 2013 1:06 am UTC
Forum: Science
Topic: Microphysics -> Macrophysics in a cellular automaton
Replies: 8
Views: 4260

Re: Microphysics -> Macrophysics in a cellular automaton

QM is: Deterministc, Differentiable, CPT-reversible In order- usually no. often yes. usually no (the Schroedinger equation doesn't even have Galilean invariance, let alone full Lorentz invariance), what does C even mean if you have no anti-particles in the theory? The measurment behaviour predicted...
by SU3SU2U1
Fri Mar 22, 2013 11:40 pm UTC
Forum: Science
Topic: [Physics] If electrons where tiny spheres... what?
Replies: 27
Views: 4546

Re: [Physics] If electrons where tiny spheres... what?

I.e. the electron is for sure not spinning around its own axis - it just has the intrisic property of "spin". Sure, but when you make a semi-classical model of an electron (as in the OP), you have to match the spin to a rotational angular momentum around its axis or you can't make the cor...
by SU3SU2U1
Wed Mar 20, 2013 9:17 pm UTC
Forum: Science
Topic: [Physics] If electrons where tiny spheres... what?
Replies: 27
Views: 4546

Re: [Physics] If electrons where tiny spheres... what?

The reason you have an incompatible system is that the gyromagnetic ratio of a sphere is not 2, unlike an electron (which famously, is 2). Try a model of an electron as a cylinder.
by SU3SU2U1
Wed Mar 20, 2013 6:25 am UTC
Forum: Science
Topic: [Physics] If electrons where tiny spheres... what?
Replies: 27
Views: 4546

Re: [Physics] If electrons where tiny spheres... what?

You aren't using a key piece of information- if electrons are spin 1/2, what is their angular momentum?
by SU3SU2U1
Tue Mar 19, 2013 10:26 pm UTC
Forum: Science
Topic: Neat and tidy charges - An unanswered question or not?
Replies: 27
Views: 5576

Re: Neat and tidy charges - An unanswered question or not?

Are there experiments trying to measure the charge of the electron and proton?


An up-to-date summary of particle knowledge- http://pdg.lbl.gov/2012/listings/contents_listings.html
by SU3SU2U1
Tue Mar 19, 2013 9:44 pm UTC
Forum: Science
Topic: Quantum Physics Interpretation
Replies: 44
Views: 7248

Re: Quantum Physics Interpretation

Yes, and I don't see how claiming that density matrices correspond to probability distributions on certain bases of my hilbert space implies that wavefunctions are fundamentally statistical.


You can see it by looking at the density matrix of a single particle.

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