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Education

Ocean-Crossing Dragonflies Discovered 95

grrlscientist writes "While living and working as a marine biologist in Maldives, Charles Anderson noticed sudden explosions of dragonflies at certain times of year. He explains how he carefully tracked the path of a plain, little dragonfly called the Globe Skimmer, Pantala flavescens, only to discover that it had the longest migratory journey of any insect in the world."

Comment Re:Ugh (Score 1) 467

Yeah, I was a little sloppy with my wording. I mentioned this in a reply to another post above, what I meant was the mathematical models, provided they agree with available data, can only be incomplete. The underlying mechanism proposed can definitely be wrong, but ultimately it's the mathematical model that produces predictions. Newtonian physics may be wrong as a physical model, but as a mathematical model we still use it to build our bridges. Thanks for the reference though, I've had Khun on my reading list for a while so I'll definitely start there.

Comment Re:Ugh (Score 5, Insightful) 467

I know you probably meant that as a joke, but the fact is that the epicycle model fit observable data quite nicely. A physical model may be incorrect, but a mathematical model, which is what actually makes testable hypotheses, that fits the data can only ever be incomplete.

Comment Ugh (Score 5, Insightful) 467

It asks whether state-of-the-art theoretical physics is really able to say that the LHC is safe given that a scientific theory that seems unassailable in one era may seem naive in the next.

And yet again, a basic understanding of the fundamental scientific process causes people to say foolish things. "Previous scientific theories were proven wrong, so we shouldn't trust current theories" blah blah blah. Previous scientific theories weren't proven wrong, just incomplete, as has been said thousands upon thousands of time. Under restricted conditions, they are still "right"- in the scientific sense of the word, which is "matches observation to our more precise measurements". OK, so people want to make the, "LHC is an extreme condition and so outside the tested realm of theory." Yeah. No. Not at all. The exact same theory which predicts that black holes could be created predicts that they are also being constantly created in the earth's atmosphere. And the exact same theory predicts that they evaporate via Hawking radiation, etc. You don't get to have it both ways. And this is where people's arguments get really silly: "But, you could be completely wrong!" Yes. I suppose we could. But in that case, we could be wrong in an infinite number of ways. And an earth destroying black hole would require us to be wrong in a very specific way on par with, "Our knowledge of electricity could be wrong and some magical circuit with just the right components will end all of reality as we know it."

Arguing that theoretical physicists would be likely to be biased is, if possible, even dumber than the LHC panic arguments. You don't need a PhD to understand that the whole hysteria is retarded. In fact, suggesting that you do is creating a false dichotomy: either you need to be a particle physicist, or you're just taking their word for it. Seriously, this "analysis" will probably do more harm than good.

Now can we as a society please move on?

Comment Re:Stop with the drugs already (Score 5, Insightful) 595

Er, preventative medicine is entirely different from treatment medicine. Vaccinations and antibiotics are entirely different compounds. The article is about letting certain illnesses run their course naturally, not saying, "Well, screw it let's just not bother with the whole medicine thing." Unless of course you'd like to see a resurgence in polio.

It appears that years of media scaremongering and anti-vaccine lobbies have gotten through the youth crowd quite effectively.
News

Submission + - Man Shot by Police in Home of Danish Cartoonist

dexmachina writes: More than four years later, the Danish cartoonist behind the famous Muhammad caricature is still a target. Kurt Westergaard, along with his wife and grandchild, was attacked in his home yesterday by a 28-year-old Somali man, alleged by the Danish Security and Intelligence Service to have ties to al-Qaeda. Police shot the intruder in the arm and leg and apprehended him. Jyllands-Posten, the newspaper that originally published the cartoon, carried a statement from Westergaard. He writes that, while he had feared for his life, he has "turned fear into anger and indignation".

Comment Re: article tag (Score 2, Insightful) 523

Simple solution: If you do not want- do not buy. Developers aren't idiots. Religious video games will be industry standard when hell freezes over. That's sort of the main point of the article. At the same time, there's certainly a niche market for them. I don't enjoy racing games, that doesn't mean I'm opposed to their existence. Why should this be any different? Seriously, in cases like this the whole, "leave religion out of it," line is just retarded. On that note, Happy Newton's Birthday everyone.

Submission + - Supreme Court of Canada Allows New Libel Defence

dexmachina writes: Canada's highest court made a ruling today that gives journalists new ammunition against libel charges. The so-called "responsible communication" defence allows journalists, and their publishers, to "escape liability if they can show that they tried to verify the facts and the published material is a matter of public interest." The ruling explicitly extends to online journalism, including bloggers. Details as to when the defence is applicable are listed in the above article. Says Toronto Star lawyer Paul Schabas, "It's probably the most important decision the Supreme Court's ever decided on the law of libel...This means there will be more information put out to the public to scrutinize what public officials do and to debate matters of public interest."
Image

Music By Natural Selection 164

maccallr writes "The DarwinTunes experiment needs you! Using an evolutionary algorithm and the ears of you the general public, we've been evolving a four bar loop that started out as pretty dismal primordial auditory soup and now after >27k ratings and 200 generations is sounding pretty good. Given that the only ingredients are sine waves, we're impressed. We got some coverage in the New Scientist CultureLab blog but now things have gone quiet and we'd really appreciate some Slashdotter idle time. We recently upped the maximum 'genome size' and we think that the music is already benefiting from the change."

Comment Re:Correlation is not causation (Score 1) 320

It's been said by other people already, but it merits repetition so that people will stop using this stupid argument and thinking they're clever for it. This is why studies are accompanied by confidence intervals, etc. If "these other factors counteract it" and there is no net effect then there is no effect. Correlation doesn't imply causation. Yes, we know. We get it. However, causation implies correlation. And by the contrapositive, no correlation implies no causation. Learn statistics before trotting out tired old cliches.

Comment Re:What happens when the laser is turned off? (Score 3, Informative) 72

As far as the reflection losses go, it's not converted to anything, it's transmitted. That's what the GP meant by "if you can see it the rainbow isn't completely contained". There's no such thing as a perfect reflector, some of the light is always transmitted through. And since we can't attain perfect vacuum, there will also be internal collisions with gaseous molecules, which can either transmit the absorbed energy via heat in colliding with other molecules, or re-transmit it as light, though possibly in a series of longer wavelengths.

As for the solar cells thing... no. That's a completely different situation. The trapped rainbow is a nearly closed system, with no continuous energy input, and the problem is that we can't make it completely closed (and if we could, it's internal entropy would then increase over time so it still couldn't be perfectly stable). Technically, I suppose all the energy can't be sapped since it's exponential decay, but the system energy asymptotically approaches 0 (and once a small enough amount remains, the fact the energy is discrete becomes important). It's about inefficient energy conversion. Far form implying that we could create 100% efficient solar cells, this is why we can't create 100% efficient solar cells.
The Internet

Submission + - Canadian Ruling on Traffic Shaping Practices (crtc.gc.ca)

An anonymous reader writes: "The CRTC today introduced a new framework to guide Internet service providers in their use of Internet traffic management practices. ISPs will be required to inform retail customers at least 30 days, and wholesale customers at least 60 days, before an Internet traffic management practice takes effect. At that time, ISPs will need to describe how the practice will affect their customers' service. The Commission encourages ISPs to make investments to increase network capacity as much as possible. However, the Commission realizes that ISPs may need other measures to manage the traffic on their networks at certain times. Technical means to manage traffic, such as traffic shaping, should only be employed as a last resort."

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