Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror

Comment Re: It's a NEW revenue source (Score 1) 196

I hate that culture has been locked behind a paywall. I remember the student paper I wrote a bit for in college afraid to quote two lines from one of my country's most celebrated (and long dead) authors because his grandkids are such litigious assholes, enabled by daft copyright laws written by Disney lobbyists. The balance is unacceptably skewn to impoverish the commons. Slashdot used to take that as read.

Comment Re:Crows are amazing, but statistics are not (Score 1) 40

I don't much like scoffing at a paper I have only skimmed in an area I know next to nothing about, but I have questions before I'd pay any attention to this result.

Surely every predator learns to do this kind of "statistical reasoning"? Hunting in some areas gives better return than in others. Foraging animals similarly with other foods. Every house dog I've ever known had an instinctive knowledge of which adult to beg for scraps from at the table for combinations of far more than two people, too.

"In the experiment, the two crows had to choose between two of these images, each corresponding to a different reward probability." The only difference between this and a predator chosing which fork in a path to take is that it's a 2D abstract image, but I'm sceptical that makes much difference to a creature that relies on its vision.

Comment Re:Two independent co-located gravity vectors? (Score 2) 70

I think you could picture "finding its own level" to mean that the gravitational force at every point on the surface is the same (i.e. the potential energy due to gravity is the same). If the local gravity in one region is weaker, the water surface needs to be lower to experiece the same gravity as it does at other places. That makes for a dip in the low gravity region.

Comment Re:I don't think this makes sense (Score 3, Informative) 25

The 'main' tsunami, the one that hit Japan, is the shock wave in water. I think, if I'm reading the article correctly, that the suggestion is that the shock wave in the air transferred enough momentum to water in the atlantic to cause a small (~10 cm) tsunami there too. That's why the OP is talking about the speed of sound in air. Here's a quote from TFA that seems relevant:

But strong weather events can also create shoreline wave surges, called meteotsunamis. Creating one requires a sustained atmospheric disturbance with a substantial pressure drop or jump. That air pressure wave also needs to move at roughly the same speed as the sea’s waves. As the waves travel together, Dusek says, “You just keep feeding energy into that wave, and it builds up and up and up.”

Comment Really? (Score 1) 79

One of the problems faced by classical AI, he says, is that it often built its models on how the brain might work, using concepts and operations that could be derived from introspection and common sense. "Such an approach assumes that you can introspect internal states of the brain with concepts and words people use to describe objects and actions in their daily lives," he writes. "It is an appealing approach, but its results were all too often insufficient to build a model of how the biological brain really works."

This sounds pretty woolly. Yes, neural networks were loosely inspired by the concept of a neuron. That's not to say they're even an attempt to actually model consciousness. Other AI models are even less connected with cognition. The idea that there's more to be learned from better modelling the brain is almost too obvious to bother stating it. Am I misinterpreting him?

Comment Re:Better to detect cheaters (Score 5, Interesting) 27

Lichess does use software to detect cheaters. I know of several kids who had accounts banned for that reason; one of them even admitted to cheating afterwards. They look at what's called average centipawn loss. The metric chess computers use to evaluate a position is measured in units of pawns, i.e. all else being equal, if I'm a pawn up, it's +2 and if I'm two pawns down it's -2. The evaluation functions are fairly subtle, considering positional features too. The traditional (pre-AI) computer algorithms were minimax algorithms: each move by white aimed to maximise this metric, and each move by black aims to minimise it. If you take the computer's evaluation of a position before and after I move, I will have played a non-ideal move frequently. The drop in evaluation is called the centipawn loss (i.e. in units of 0.01 pawns). A top level player might have an average centipawn loss of 10 per move. An amateur like me will be higher. A cheater will be lower. Hence, we can detect cheaters. You can get lucky over a game or two, but if you're consistently playing computer moves, you'll be detected. And yes, there are strategies to avoid detection, but they involve leaning on the computer less with obvious disadvantages.

I don't really get cheating at it. Wow, your computer is good at chess. Who fucking cares? I bet your car can beat me or even a top class runner in a race too.

Comment Re:Is this an Onion article? (Score 2, Insightful) 27

Not really. It's more interesting from the wider perspective of data science increasingly making privacy much harder. For example, I recall an article on a similar process that could identify people from an MRI. That means that an anonymised database of MRI - which is more or less essential in light of current privacy laws for medical research - isn't really as anonymous as you'd wish. I play chess. In practical terms, this might be useful to elite players in identifying anonymous accounts of rivals who are trying to quietly experiment with some new ideas. Highly niche, certainly, but not useless. In the longer run, it might be the sort of direction that allows us to write software that can analyse my games and tell me what kind of mistakes I make, or even develop a custom training programme for me. That could be more generally useful, and it would be proof of concept to try doing this for more analogue activities.

Comment Re:Confusing use of 'forecast' .... (Score 5, Informative) 52

The graph is here: https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fatmosphere.copernicus.... The forecast seems to be quite short term. In terms of the measured data, 2021 doesn't look dramatically different from 2020 to me, but both seem to have been close to the median until mid-September and then climb dramatically compared with the distribution fit to 1979-2018. November and December last year seem to have been especially aberrant. Interestingly, 2019 was dramatically lower, even though it was to early for industrial shutdowns due to the pandemic to be a cause. They also show examples of recent forecasts vs real data: https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fatmosphere.copernicus....

Comment Re:Why? (Score 5, Insightful) 135

If you live in Europe, damned near every site you visit now has a pop-up with detailed options around cookies that must be negotiated before you can so much as read an article. It's a response to obligations under GDPR, and it's damned near malicious compliance because no one reads them, and most just click "accept all" because who has the time to navigate each one of these? A browser-level setting with suitable standardisation would enact the spirt and not just the letter of GDPR. If you haven't been exposed to these, I could understand why this seems to be out of nowhere, but for Europeans, I think something like this is a necessary development.

Comment Re: Are you short or tall. (Score 1) 471

The more things change, the more they stay the same.

The Twopenny Hangover. This comes a little higher than the Embankment. At the Twopenny Hangover, the lodgers sit in a row on a bench; there is a rope in front of them, and they lean on this as though leaning over a fence. A man, humorously called the valet, cuts the rope at five in the morning. I have never been there myself, but Bozo had been there often. I asked him whether anyone could possibly sleep in such an attitude, and he said that it was more comfortable than it sounded--at any rate, better than bare floor. There are similar shelters in Paris, but the charge there is only twenty-five centimes (a halfpenny) instead of twopence.

-- George Orwell, Down and Out In Paris and London.

Slashdot Top Deals

There is no opinion so absurd that some philosopher will not express it. -- Marcus Tullius Cicero, "Ad familiares"

Working...