typodupeerror

## Comment: Re:Read the whole article (Score 1)136

by hansraj (#47234057) Attached to: The Profoundly Weird, Gender-Specific Roots of the Turing Test

Also, either the author of the article has a listening comprehension problem or the assitant professor quoted in the article has a reading comprehension problem.

Look at Turing's original article. It says that the imitation game is played between a man (A), a woman (B), and a player C. C has to decide among A and B who is a man and who is a woman. Now, the _man_ is replaced is a computer and we ask if C will perform as well or poorly as before.

So in Turing's version we have a computer A pretending to be a woman to C, and a woman trying to convince C that she is the woman.

Turning's original test _does not_ have a man and a computer pretending to be a woman to a judge.

## The Profoundly Weird, Gender-Specific Roots of the Turing Test136

Posted by Soulskill
from the i'm-sorry-dave,-these-shoes-are-half-off dept.
malachiorion writes: Alan Turing never wrote about the Turing Test, that legendary measure of machine intelligence that researchers claimed to have passed last weekend. He proposed something much stranger — a contest between men and machines, to see who was better at pretending to be a woman. The details of the Imitation Game aren't secret, or even hard to find, and yet no one seems to reference it. This article explains why they should — in part because it's so odd, but also because it might be a better test for 'machines that think' than the chatbot-infested, seemingly useless Turing Test.

## Comment: Re:the joker in the formula (Score 1)686

by hansraj (#47222521) Attached to: Aliens and the Fermi Paradox

There are 7 billion people on earth but only one tallest person. Clearly the odds of finding a tallest being on any planet is 1:7_billion.

The point of parent is that if the intelligent "us" were not us, someone else would have evolved to be as intelligent. You can argue that point but don't argue probabilities based on 1 out of however many being intelligent. Two intelligent species would have competed and one would be killed off so far in earth's history.

## Comment: Re:Fascinating, terrifying stuff is news (Score 1)358

by hansraj (#47165237) Attached to: The Disappearing Universe

Do you realize that the whole point of the GP's "exercise" was that you can't ignore relativity? It is due to relativity that the time observed by the traveller would be so little. If you are travelling at a velocity very close to the speed of light, in your own frame time is essentially standing still. You would get to your destination before you could blink your eye.

Now redo the calculations taking time dilation into account.

## Comment: Usual /. (Score 4, Informative)82

by hansraj (#47145519) Attached to: Optical Levitation, Space Travel, Quantum Mechanics and Gravity

The summary (and the headline) unnecessarily highlights space travel as a usage for radiation pressure and delegates the most interesting part as a footnote-ish last line. The /. crowd as usual starts shouting pros and cons of space travel, as if every comment on this page is not saying what has already been said a million time around here, and nobody to talk about the interesting part.

I wish someone with the right background in physics posted something more interesting about the fact that a group of researchers have come up with prediction of how a non-quantized spacetime (gravity) would look in the presence of quantized matter/energy. Apparently this would look different than a quantized background with quantized foreground (IANAP, so I don't know what is this all about) in a measurable way. If they can levitate a tiny but macroscopic mirror using light and balance it then giving it a gentle push would create a pendulum with no friction slowing it down. By probing the frequency evolution one can potentially get closer to actually knowing whether a quantum theory of gravity is the right way to unify QM and GR.

It's fascinating that such things are possible even in principle with existing technology. I wish someone would explain something more related to this.

## Comment: Re:Clueless (Score 1)80

by hansraj (#47109063) Attached to: The Rule of Three Proved By Physicists

I don't think so.

Stability of ordinary matter is well explained by other more traditional theories (strong/weak forces for nucleus, electromagnetic for atoms and molecules, gravity for even larger structures). This theory described stable states that initially no one believed existed.

Morever, these configurations are stable but quite fragile.

## Comment: Re:Clueless (Score 5, Informative)80

by hansraj (#47107177) Attached to: The Rule of Three Proved By Physicists

I found the summary confusing but the article made more sense.

The theory was that there exist configurations of three particles that is stable in a strange sort of way. The strange part is that if a certain configuration was stable then putting the particles in the same configuration but the distances blown up by a certain factor (22.7 if the three particles were the same) gives another stable configuration. So you can keep blowing up the distances in multiples of 22.7 and would get an infinite sequence of stable configurations. These configurations are necessarily quantum and not classical since the distances involved would be much larger than the range of the forces between the particles. (Although even the initial distances are large too, if i understood correctly, you would agree that they _will_ get pretty large at some point).

Now some independent groups have shown the existence of such states with the required blowup. Since similar-particle setup required cooling things down to the limit of present day technology, only _one_ configuration was observed initially. Someone used a system of different particles resulting in a blowup factor less than 22.7 allowing them to observe _three_ of these configurations, essentially validating the theory.

## Comment: What increases the risk (Score 2)172

by hansraj (#46824935) Attached to: Asteroid Impacts Bigger Risk Than Thought

I don't think anyone is implying that we are doomed because of _these_ impacts.

However, in general the frequency of an impact event is inversely proportional to the size of the impacting body. Smaller impacts happen more often than the larger ones. Counting the smaller ones precisely gives you an idea of what the risk of a big event is.

So far people underestimated these smaller ones that is being reported. The wikipedia article I linked to earlier, suggests one impact every five years at the level of 5 kT of TNT. These guys being right would imply a risk of at least a magnitude higher than previously estimated. That increases the risk for the really big ones too.

Posted by Unknown Lamer
ericgoldman writes "Terry Childs was a network engineer in San Francisco, and he was the only employee with passwords to the network. After he was fired, he withheld the passwords from his former employer, preventing his employer from controlling its own network. Recently, a California appeals court upheld his conviction for violating California's computer crime law, including a 4 year jail sentence and \$1.5 million of restitution. The ruling (PDF) provides a good cautionary tale for anyone who thinks they can gain leverage over their employer or increase job security by controlling key passwords."

## Comment: Re:I know what you're thinking.. (Score 4, Informative)77

by hansraj (#41172323) Attached to: NASA Uncovers Millions of New Black Holes

A black hole would dissipate via Hawking radiation only if it doesn't absorb more energy than it emits. Large blackholes absorb more energy (cosmic background radiation) than they would emit and hence will not necessarily dissipate. From wikipedia:

"A black hole of one solar mass has a temperature of only 60 nanokelvins; in fact, such a black hole would absorb far more cosmic microwave background radiation than it emits. A black hole of 4.5 × 1022 kg (about the mass of the Moon) would be in equilibrium at 2.7 kelvin, absorbing as much radiation as it emits. Yet smaller primordial black holes would emit more than they absorb, and thereby lose mass."

## Comment: Re:Great Super Earths. (Score 1)208

by hansraj (#37381346) Attached to: 50 New Exoplanets Found, Billions More Await

Our planet has a very energetic core. Any civilization having that kind of technology could be interested in harvesting it (They also get a huge core made of solid iron as a bonus!)

## Comment: Re:Completely wrong post at +5 Insightful (Score 1)172

by hansraj (#37197882) Attached to: Google Reaches \$500 Million Settlement With Feds

Slashdot moderation sucks.

It used to work better when there were fewer stories on slashdot. These days the front pages gets updated at such a rapid rate that I suspect a big chunk of readers with mod points going past just a few comments in any one story. If they keep jumping from story to story then faulty moderations are bound to go uncorrected for relatively long times.

Give it a while though; residents of the internet wake up at different times :)

## NASA Discovers 7th Closest Star137

Posted by CmdrTaco
from the practically-in-my-back-yard dept.
Thorfinn.au says "Scientists using data from NASA's Wide-field Infrared Survey Explorer (WISE) have discovered the coldest class of star-like bodies, with temperatures as cool as the human body. Astronomers hunted these dark orbs, termed Y dwarfs, for more than a decade without success. When viewed with a visible-light telescope, they are nearly impossible to see. WISE's infrared vision allowed the telescope to finally spot the faint glow of six Y dwarfs relatively close to our sun, within a distance of about 40 light-years. 'WISE scanned the entire sky for these and other objects, and was able to spot their feeble light with its highly sensitive infrared vision,' said Jon Morse, Astrophysics Division director at NASA Headquarters in Washington. 'They are 5,000 times brighter at the longer infrared wavelengths WISE observed from space than those observable from the ground.'"

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