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User: Roger+W+Moore

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Comments · 5,344

  1. Why contradictory? on Wisconsin DA Threatens Arrests Over Sex Ed · · Score: 5, Insightful

    Isn't it impossible to have contradictory laws - at least within a single legal system? The way it works in the UK at least is that any new law automatically supercedes older ones. So if there is a contradiction you follow the most recent law because it is deemed that MPs have changed their minds about the previous law. Does this DA really believe that any judge would find a teacher guilty if he took it to court? It strikes me as if he is trying to change the law rather than enforce it which is not part of his job description.

  2. Bigotry, prejudice != Racism on Son Sues Mother Over Facebook Posts · · Score: 3, Insightful

    The place I see "racism" is in the very idea of the assumption that anyone from the south deserves to be denigrated and disrespected automatically, as if there are no ignorant people or bigots from elsewhere.

    What you describe is bigotry and prejudice, not racism. Clearly there are bigots elsewhere as evidenced by the post you are complaining about (which if you think about it is beautifully ironic). Having visited the rural south of the US for the first time a couple of weeks ago I found the people extremely polite and friendly and the countryside was beautiful. So if some of your fellow citizens don't appreciate that just be thankful that it will probably help you stay that way.

  3. No - molten sodium on Largest Sodium Sulfur Battery Powers a Texas Town · · Score: 1

    Why, is there a pool of molten lead around it?

    No - this is a sodium-sulphur battery so there is a pool of molten sodium which acts as the anode: have a read here.

  4. General Relativity Simplified on Man-Made Atomic Clocks the Best In the Universe · · Score: 4, Interesting

    How does gravity affect light?

    Strictly speaking it does not - it bends space-time and light travels on a straight line which looks bent. Think of it this way - you took off and flew in a straight line from Edmonton, Alberta to London, UK someone in orbit would see that you had actually flown a curved path on the surface of the Earth. Light is the same - it thinks it is following a straight line but when looked at from a different frame it appears as a curve.

  5. Re:from the article on Largest Sodium Sulfur Battery Powers a Texas Town · · Score: 4, Interesting

    ...and how much would a gas or diesel powered generator with a 4MW capacity cost? Since the battery consists of rather dangerous chemicals (e.g. pure sodium metal), has a limited life span and has to operate at 350C (ok - that's probably less of an issue in Texas in the summer ;-) it is hard to see any environmental argument for it over a diesel generator once the heating, production and charge/discharge efficiency are factored in.

  6. Energy not Power on Largest Sodium Sulfur Battery Powers a Texas Town · · Score: 4, Informative

    so it holds 32MW

    No - it can hold 32MWh (=115.2GJ). Batteries hold energy not power. Since power is energy per unit time you have to multiply it by a time to get energy.

  7. Re:And it will only take you a million years... on First Impressions of the 11th Doctor Who · · Score: 1

    That was one of Douglas Adam's episodes - he wrote some brilliantly witty scripts as you might expect.

  8. Re:BMWs and Mercedes on How To Build Roads To Control How Fast You Drive · · Score: 1

    They were definitely going well in excess of 155 mph and I have never heard of any hard speed limitation imposed on cars - only what the engine can power them to. While the design might be to ensure 155 mph with German engineering I am sure that they are designed to go 155 mph up hill with a strong headwind and so can probably go a lot faster on the flat with no wind.

  9. Right of Way on How To Build Roads To Control How Fast You Drive · · Score: 1

    I was always told that pedestrians (even jay-walking) have the right of way.

    Having right of way means that you have to give way to them whenever you see them. If they jump out at you from between parked cars such that there was no chance for you to see them and no way for you to stop in time then you are not at fault. Of course the problem is that you have to be able to prove in court that there was no reasonable way for you to see them and give way which is not easy.

  10. Wrong way around on How To Build Roads To Control How Fast You Drive · · Score: 1

    (despite having a traffic density twice as high)

    Actually it is probably partly because the traffic density is so high. The average speed of cars on a British motorway I would guess is well below that of cars in the US because there is so much traffic. In addition the relative speed of vehicles colliding will be less because there is less chance to be able to build up a large speed differential this likely makes accidents in the UK far less fatal than in the US. Of course to prove this you would need statistics of all motorway collisions in the US and UK, not just the fatal ones, but I could not find any to compare.

  11. BMWs and Mercedes on How To Build Roads To Control How Fast You Drive · · Score: 1

    do Autobahn drivers drive 200 miles per hour?

    Yes some do! My first time driving on an unrestricted section of the autobahn (lots of it does actually have speed limits) I was pushing my car to see how fast it would go (180 kph or about 110-120 mph) while still been overtaken by BMWs and Mercedes which passed as if I was standing still. While I do not know for certain that they were going at 200 mph it was certainly not much below that. In fact this made overtaking a little scary since pulling out to overtake a car in the far distance could end up right behind you in a matter of seconds because the speed difference was so large.

  12. Re:Wow. on Google Slams Viacom For Secret YouTube Uploads · · Score: 5, Insightful

    Who would you rather have controlling a large chunk of the flow of information on the internet, Google, or Viacom?

    Both...and more besides. Even if Google is benign now they are a company and so their directors and owners can change over time. If you have a good diversity of companies 'in control' then there is a greatly reduced possibility for one of them to misbehave because, if they do, people will move away from them. This is about the only thing that we can do to make a company sit up and listen and if we are unable to do this because there are no alternatives then we are in real trouble.

  13. Newt Doctors? on Scientists Demonstrate Mammalian Tissue Regeneration · · Score: 1

    Scarring is much faster, and probably carries a lower risk of infection for creatures that don't have access to medical care.

    What medical care do newts have access to?

  14. Where is the Evolutionary Advantage? on Scientists Demonstrate Mammalian Tissue Regeneration · · Score: 1

    Presumably in the past there must have been some evolutionary advantage to developing scars rather than regrowing a new limb. It is possible that this might not be a factor that helps us now. For example perhaps it allowed more rapid recovery from a serious wound whereas now, with hospitals and modern medicine, a more complete recovery would be an advantage over speed. However until we have some idea what the advantage was/is it would be wise to proceed with some caution.

  15. Re:Motormouth failed his talking test? on Pennsylvania CISO Fired Over Talk At RSA Conference · · Score: 1

    Apples and oranges, one is a health risk, one isn't.

    Heavy water is not a health risk unless it replaces around 25% or more of your body's total water and I very much doubt that enough heavy water has ever been made to contaminate an aquifer to a level of 25%. Of course heavy water used as a moderator in a nuclear reactor may contain a reasonable amount of tritium which is radioactive as well as other contaminants but heavy water itself is relatively harmless unless you consume enormous quantities of the stuff.

  16. Re:Physics anyone? on Tracking Water Molecules Could Unlock Secrets · · Score: 4, Informative

    Quantum mechanics is only in effect when considering things even smaller then atoms.

    No, as a fundamental law of physics quantum mechanics is always "in effect" - otherwise it would not be a fundamental law. Classical mechanics is just the approximation of quantum mechanics for incoherent states with very large quantum numbers, but it is still quantum mechanics. Of course it is also possible, perhaps even likely, that Quantum Mechanics itself may turn out to be an approximation of some more fundamental physics but if that is the case we haven't seen any evidence of it yet.....other than our annoying inability to come up with a working quantum theory of gravity.

  17. Liers are usually tring to Sleep on How Do You Get Users To Read Error Messages? · · Score: 1

    Is it plugged in? yes? LIER! It it turned on? yes? LIER! Can you see any messeges on the screen? no? LIER! Why do they lie!??!?

    Probably because they are trying to sleep (or may actually have achieved said state which would explain why they are not reading the error messages) but that's what you would expect if you are talking to liers. Of course you might also be talking to liars but that would be different.

  18. Re:Hehe on Woman Discovers Her Wireless Internet Is Not Free · · Score: 1

    In both cases, you are still going to be arrested and convicted. Why? Because it's not YOURS to take.

    Not necessarily. Some areas have free and open Wireless providers e.g. some airports and cities plus some people opt to share their network access with others. Hence if you see an open access point it is possible that it is intended to be used. This is hard to argue with an unlocked car or house....although it is also somewhat hard to argue for a network called "LINKSYS" as well!

  19. Re:Arm your citizens... on Defending Against Drones · · Score: 2, Insightful

    I should add: I've got no problem with teaching everyone to shoot. Mandatory gun training might save some lives currently lost to stupidity.

    Training people to shoot has never been a problem. Giving stupid people guns, regardless of their training, is.

  20. Electronic Warfare on Defending Against Drones · · Score: 1

    If these are garage-built then what about electronic warfare? The initial apparatus might be expensive but it is cheap to run. Garage built drones would presumably have limited (if any) autonomy and require constant communication with the pilot so simply jamming the signal would likely be enough. With a large enough directed signal you could even knock out the electronics. This would probably not work against hardened military devices but you will have at least raised the threshold on what can get through to the point where more expensive options can be used to knock them out.

  21. Re:CP != T on What Is Time? One Researcher Shares His Exploration · · Score: 1

    Practically speaking they are the same if CPT is conserved.

    In that case any breaking will occur in the same amount but that does not mean that they are the same i.e. are you measuring the difference between matter and antimatter or are you measuring a time reversal. These are equivalent (if you have CPT) but you know which one you did.

  22. CP != T on What Is Time? One Researcher Shares His Exploration · · Score: 2, Interesting

    The other [wikipedia.org] is rather obscure, but is related to the fact that "ordinary" matter seems to be so much more abundant in our universe than anti-matter.

    Sorry but you are confusing CP (matter/antimatter) symmetry and T (time reversal) symmetry. These are not the same. In addition time reversal violation does NOT mean that a process is irreversible it just means that it prefers to go in one direction over the other.

    Both have been independently shown to be broken: CP in K and B meson decays and T in K and B meson oscillations which might be the source of your confusion. It is also worth pointing out that the combination of all three, called CPT, is expected to be conserved since it is a symmetry of relativistic space-time. If this is an unbroken symmetry then CP and T symmetries will be closely associated with each other but even then they will still be different.

    If the CPT symmetry is broken then we end up with weird effects like Lorentz-violation, antiparticles with different masses to particles and really fundamental things like Quantum Field Theory break down. This makes it very hard to even construct CPT-violating models (although they do exist).

  23. Particle Physicists on Wireside Chat With Lawrence Lessig · · Score: 1

    Unless you are a particle physicist in which case conversation is a quark gluon plasma: lots of interactions but nobody can quite agree of what actually happened.

  24. Good Guys...but bad physicists on Delicious Details of Open Source Court Victory · · Score: 1, Offtopic

    Nice to see OSS win but I wish the physics had been written up just a little more correctly. The 2008 Nobel prize was awarded for the theory of how a matter-antimatter asymmetry can arise in meson decays which was thought up a long time before Babar even existed and was first tested in Kaon decay experiments (one of which I worked on as a grad student). It was awarded to theorists who were not working on Babar - and since they were Japanese were more probably closely associated to Babar's rival, Belle. So it was hardly his "colleague" - unless you can call any particle physicist a "colleague" in which case we have all been colleagues to a lot of Nobel prize winners. Secondly this DOES NOT explain the matter-antimatter asymmetry in the Universe - the effect is far, far too small. We don't know how this arose. Possible candidates are "strong CP" or a similar CP violation term in the neutrino mixing sector of the Standard Model (or something else). So while this effect might be a clue as to what is going on it is definitely not he full picture.

  25. Defeat via Email on Keep SSH Sessions Active, Or Reconnect? · · Score: 1

    I don't know about you, but I have a hard time glossing over a message like "KEY CHANGED--SOMEBODY COULD BE TRYING TO BREAK IN!"

    Even if you received an email beforehand coming from your sysadmins indicating that they had installed a new version of SSH and because the key had changed so don't worry about any warnings. If they can manage a man-in-the-middle attack then faking an email will be trivial.