Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror
×

Comment Re:not the first time (Score 5, Informative) 136

The wave-particle duality is not a quantum superposition like you're describing (which would break down under measurement), although the caricatured manner in which we teach it might lead you believe that. It's a little more simple than that.

In our world, we are used to two kinds of things: particles, and waves. We are used to this distinction, and describe most things in one of these manners. Sound is a wave, a billiard ball is a particle, vibrations are waves, bricks are particles. If something is a particle, it has certain properties, like position, size, and shape. If it is a wave, it has certain other properties like wavelength, frequency, and amplitude. In addition, there are some common properties like velocity and direction.

When it came to studying light (and many other quantum stuffs), we can't directly see what it's made of. But we can take measurements of each "puff" of light, and infer its properties that way. When we do this, we notice that puffs of light have some properties which are particle-like, and some which are wave-like. So the term "particle-wave duality" became popular to describe this new material that was behaving simultaneously like a particle and a wave. It doesn't make sense to ask which one it is - a "puff" of light is neither a particle, nor a wave, but a different kind of stuff which has some properties of each.

Comment Re:Did *everyone* miss the point here? :-( (Score 1) 375

It remains the case that either my original statement is true, meaning a counter-example for the reliability of fact-based ranking has been identified, or my original statement is false, in which case the statement itself becomes a counter-example because it is widely repeated but incorrect.

Comment Did *everyone* miss the point here? :-( (Score 1) 375

Oh, the irony!

Erm... It was intended to be ironic. Well, paradoxical, technically. Compare my final sentence

Remember, not so long ago, the almost-universal opinion would have been that the world was flat.

with the classic "This statement is false".

If my statement were true, it would illustrate a problem with Google's proposal.

But as my statement is false, it is itself a demonstration of the problem, because it perpetuates a myth sufficiently popular that it even has its own Wikipedia page. I was a little surprised that I couldn't also find it on Snopes.

Anyway, it's disappointing that no-one seems to have noticed that. Were none of you even a little suspicious about a post that in one paragraph said "Just because something gets repeated a lot, that doesn't make it factually correct" and then repeated one of the most popular myths there is? Really?

Comment Re:FEO (Score 5, Insightful) 375

"Fact optimization" is already behind more than one multi-billion dollar industry: advertising, political lobbying...

And this is why I fear this initiative, no matter how well intentioned, is doomed to failure. Just because something gets repeated a lot, that doesn't make it factually correct. Moreover, censoring dissenting opinions is a terrible reaction to active manipulation and even to old-fashioned gossip, because it removes the best mechanism for correcting the groupthink and promoting more informed debate, which is introducing alternative ideas from someone who knows better or simply has a different (but still reasonable) point of view.

Remember, not so long ago, the almost-universal opinion would have been that the world was flat.

Google

Google Wants To Rank Websites Based On Facts Not Links 375

wabrandsma writes about Google's new system for ranking the truthfulness of a webpage. "Google's search engine currently uses the number of incoming links to a web page as a proxy for quality, determining where it appears in search results. So pages that many other sites link to are ranked higher. This system has brought us the search engine as we know it today, but the downside is that websites full of misinformation can rise up the rankings, if enough people link to them. Google research team is adapting that model to measure the trustworthiness of a page, rather than its reputation across the web. Instead of counting incoming links, the system – which is not yet live – counts the number of incorrect facts within a page. 'A source that has few false facts is considered to be trustworthy,' says the team. The score they compute for each page is its Knowledge-Based Trust score. The software works by tapping into the Knowledge Vault, the vast store of facts that Google has pulled off the internet. Facts the web unanimously agrees on are considered a reasonable proxy for truth. Web pages that contain contradictory information are bumped down the rankings."

Comment Re:What do HD viruses actually _do_ ? (Score 1) 324

Are these root vectors playing the odds and assuming they'll be installed on an x86 machine running Windows7, so they put that payload in the firmware?

It's not like the firmware has an IP stack.

It doesn't take very many bytes to make one. And your hard drive is communicating over a bus. You'd be surprised what types of communication protocols are recognized over various internal data paths... How do you think those old Ethernet-over-SCSI adapters worked?

Comment Re:It wasn't about Pluto (Score 1) 196

So what is wrong with establishing the definition as Criteria 1, Criteria 2, Criteria 3,etc., etc. or objects currently classified as planets? It's not like there aren't other classifications that we ignore if we choose to. We also are in no danger of some intelligent life from another solar system dropping by and saying "What? How is that a planet? It doesn't meet your own criteria!"

Comment Re:Don't explosions create seismic waves? (Score 4, Interesting) 88

If these are truly explosions ejecting many tons of earth out of these holes, wouldn't they be detected by seismographs around the world, or at least in Russia? I think they should plant seismic detectors in the area so they can immediately detect the next explosion and quickly send a research team to site.

Yes, if there had been a large explosion, even if it was not combustion, that amount of earth moving would have been measurable by seismic instruments thousands of miles away. Quarry explosions have been known to display as earthquakes as large as 2.7 on the Richter scale and felt for hundreds of miles, and those would pale in comparison to the amount of earth movement involved in the Siberian craters. It is much more likely that they escaping gas just gradually caused sinkholes, which would still create seismic events, but would be more likely many smaller ones and probably would not pick up on instruments unless they were within 100 miles.

Comment Re:Monopolistic: Do no evil? (Score 3, Insightful) 185

Now will ICANN put its foot down

It had better hope so, because giving entire TLDs to specific big companies could easily be the straw that breaks the camel's back in terms of the rest of the world accepting US-led administration of the general Internet. There's plenty of scepticism already, but organisations like ICANN are tolerated because frankly no-one has much of a better idea or wants to take on the responsibility. However, it is not difficult to think of a better idea than letting big businesses rewrite the established rules in arguably the most important address space in the world today for their own benefit.

Comment Re: I appreciate the sentiment.. (Score 1) 102

Oh, you must not live in the United States where the insurance must cover people with pre-existing conditions. I have not had insurance through my company for years. Well, I did, but not my family. They paid for my coverage. However, it was much cheaper to insure my family on the open market rather than through the employer plan. People seem to have got it in their head that they have to be tied to a company in order to receive health insurance. This has never been the case. Outside coverage has always been available, and it is often cheaper other than whatever part the company covers. These days a lot of companies "offer" an "excellent benefit plan", but when you look at it, you pay 100% of the premium. How is that an "Offer"? You could get the same outside, probably for less money, and not be tied to a particular employer.
Earth

We Stopped At Two Nuclear Bombs; We Can Stop At Two Degrees. 341

Lasrick writes Dawn Stover writes in the Bulletin of the Atomic Scientists that climate change is irreversible but not unstoppable. She describes the changes that are happening already and also those likely to happen, and compares what is coming to the climate of the Pliocene: 'Even if countries reduce emissions enough to keep temperatures from rising much above the internationally agreed-upon "danger" threshold of 2 degrees Celsius (which seems increasingly unlikely), we can still look forward to conditions similar to those of the mid-Pliocene epoch of 3 million years ago. At that time, the continents were in much the same positions that they are today, carbon dioxide levels ranged between 350 and 400 ppm, the global average temperature was 2 to 3 degrees Celsius higher than it is today (but up to 20 degrees higher than today at the northernmost latitudes), the global sea level was about 25 meters higher, and most of today's North American forests were grasslands and savanna.' Stover agrees with two scientists published in Nature Geoscience that 'Future warming is therefore driven by socio-economic inertia," and points the way toward changing a Pliocene future.

Comment Re:I appreciate the sentiment.. (Score 1) 102

MS could give a full free ride including rent, food, and gas to a good number of students every single year and it would be the rounding error on their earnings.

And if they tied that education to a job at Microsoft, they would come out ahead, even if they paid industry standard wages.

Slashdot Top Deals

This file will self-destruct in five minutes.

Working...