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Comment We should support this (Score 1) 523

Yes, these people are partly responsible for creating these programs in the first place. But at least now they're opposing them. That's something I agree with. We should let them know we agree with it. And just as import: tell the Democrats we agree with it. Tell them they'd better get behind this, or they'll be on the losing side of the issue in the next election.

And yes, I know that many of the Republicans who voted for this are probably just doing it for political reasons, because they have to oppose whatever Obama supports. But that doesn't change the conclusion. If politicians just do whatever they think will be politically beneficial, then you need to make it beneficial to do what you want them to do. And when they do something you agree with, don't hesitate to voice your approval.

Comment Build it! (Score 1) 208

Don't just simulate them. Let them work with real tools. For example, it's really easy to build a telegraph. This could make a fantastic class project. Divide them into small groups, and have each group build a working telegraph key. Connect them up in pairs, give them a Morse code chart, and have them try to send messages to each other. Now hook them up to a central switchboard and teach them the basic principles of networks and switching mechanisms. Finally, explain how "the internet" is doing exactly the same thing as the network they built, just automated and on a bigger scale.

Comment Re:Future Schlock (Score 1) 734

Girlfriend, in 16 years the only thing that is really likely to change is the color of the table counter-tops at the local Burger King and the name on the alcohol/caffeine combo drink sold at the Arco Mini-mart.

Let's see, 16 years ago was 1998. Smartphones didn't exist yet. Tablet computers didn't exist yet. Even the iPod wouldn't be released for three years. The very first hybrid car had just gone on sale in Japan, but none would be available in the rest of the world for a year or two. Mining of oil shale in the United States was nonexistent.

Not to comment on this particular prediction, but just as a general comment, a lot more can change in 16 years than you think.

Security

ShapeShifter: Beatable, But We'll Hear More About It 102

Slashdot contributor Bennett Haselton writes: "A California company called Shape Security claims that their network box can disable malware attacks, by using polymorphism to rewrite webpages before they are sent to the user's browser. Most programmers will immediately spot several ways that the system can be defeated, but it may still slow attackers down or divert them towards other targets." Read on for the rest of Bennett's thoughts.

Comment Re:Maps roads, Not Coverage (Score 3) 113

I'm not sure what your point is. This isn't supposed to be a map of cell phone coverage. It's a map showing all the data points in their database. The goal of this project is to let people identify their location based on the visible networks, not to tell them what kind of network coverage they'll have in any location.

Comment Misleading summary (Score 5, Informative) 458

It's generally accepted that the Universe's history is best described by the Big Bang model, with General Relativity and Quantum Field Theory as the physical laws governing the underlying framework.

No no no. It's generally accepted that each one of these theories taken individually is the best currently known description within its particular domain. It is not generally accepted that you can just throw them together and get an accurate description of the fundamental nature of the universe! In fact, we know you can't do that because general relativity and quantum field theory are deeply incompatible with each other. People have been working for half a century to find a single consistent theory that can reproduce the predictions of both. They've made a lot of progress, but we're still a long way from having any confidence about what the true fundamental theory is.

The picture of eternal inflation described in this article is plausible based on what we know. But it's still very speculative. That's true of any discussion of cosmology. Our current knowledge is just way too limited to have any confidence about it.

Comment Re:Weak measurements (Score 1) 148

(for example, most hidden variable theories have been ruled out).

Actually that's not true. Only some very limited classes of hidden variable theories have been excluded. Bell's theorem is based on a set of very doubtful assumptions that weren't well understood until decades after it was first introduced. For example, it requires locality (which is now widely suspected to be false) and no retrocausality (which, assuming CPT invariance really is an exact symmetry, is almost definitely false). It also requires a really wacky assumption that your choice of what measurement to perform is uncorrelated with the values of hidden variables at the place and time where you make the choice - basically treating the experimenter and/or experimental apparatus as not subject to the laws of physics.

Comment Re:Weak measurements (Score 2) 148

How can a theory be more correct than an equivalent theory?

Yes, I simplified a bit to keep my post from getting too long. There are tons of interpretations of QM: dozens we know about, and probably lots of others that no one has thought of yet. Some are "pure interpretations", meaning they make no predictions beyond the ones made by QM itself. No experiment can ever distinguish between two pure interpretations. But a lot of them aren't pure interpretations. They still reproduce the prediction of QM to high accuracy, but in principle an experiment could distinguish between them.

If we ever learn which interpretation is correct, it will be based on evidence. But right now that evidence doesn't exist, which is why I said this is more philosophy than science. Occam's razor says we should prefer a simpler explanation over a more complicated one, but that doesn't prove the simpler explanation is actually correct. But maybe some day we'll know.

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