qnleigh

23 ms·

421.
by qnleigh 3y ago
Probably a bit yeah. But there is an argument that it is hard to store a lot of chemical energy without abundant oxygen in the environment. Oxygen stores a ton of energy, and it's quite difficult to achieve comparable energy density wi
422.
by qnleigh 3y ago
Grid cells and place cells are among the very few examples where we actually know what a population of neurons is doing. This is exciting for at least two reasons: 1. If we know what the neurons do, we can start trying to understand how the
423.
by qnleigh 3y ago
But if we'll become a grabby civilization, then there will presumably be at least trillions of humans born in the distant future who will live all throughout the universe. Isn't it that an extraordinary coincidence to find oneself
424.
by qnleigh 3y ago
I agree. I didn't know that statistic, but that was my impression from other things I've heard.
425.
by qnleigh 3y ago
If the resources required to communicate are planet-scale, then it would require comparable cooperation to build it. Maybe that gets you somewhere. And then maybe you choose to communicate in a way that requires massive resources at the rec
426.
by qnleigh 3y ago
I guess the argument is something like 'if life is unlikely to evolve, then it is surprising to find ourselves existing so early in the history of the universe. If life is likely to evolve, then how do we explain being apparently alone
427.
by qnleigh 3y ago
I'm confused by the argument here; is the argument that 'humanity could not arise once the universe has been taken over by grabby aliens, so a possible explanation of finding ourselves existing so early in the history of the unive
428.
by qnleigh 3y ago
This article seems completely off-base to me. The fact that the training method can't learn 'no 3 repeated moves' doesn't change my opinion of the result at all; to me this is just a technical detail, and does not retrac
429.
by qnleigh 3y ago
Those forces are also mediated by particles (called gluons, W, and Z bosons). But these particles are massive, charged and interacting, which caused them to behave quite differently and only act on short length scales.
430.
by qnleigh 3y ago
In particle physics, fundamental forces are generated by the exchange of virtual particles (I have been reading a quantum field theory textbook for the last few months to try to understand precisely what this means, among other questions, b
431.
by qnleigh 3y ago
Having built a similar app, maybe I can comment on this. 1. Languages that have conjugation (I am -> you are -> she is...) need a way to recognize different forms of the same word, as dictionaries typically don't have this inform
432.
by qnleigh 3y ago
What's his native language? One would need a dictionary going from English into that.
433.
by qnleigh 3y ago
Very cool! How do you handle segmenting sentences into individual words in Japanese? I've been building a similar app for Android, but gave up on Japanese partly because segmenting was so unreliable.
434.
by qnleigh 3y ago
Huh, I literally built an app that does what you describe! Basically an e-reader for language learners called Polyreader. It's a stand-alone app, not a browser plugin, but it has lots of additional features like in-line translation. Ma
435.
by qnleigh 3y ago
How does the energy density compare with a standard Li battery? How long does it take to charge?
436.
by qnleigh 3y ago
Reading between the lines, I see "I harbor zero ill will towards [Ilya]... we hope to continue our working relationship." but no such comments directed at Helen and Tasha. Given how sanitized these kinds of releases usually are, I
437.
by qnleigh 3y ago
Perhaps also because it takes a generation or two to raise future teachers for these new disciplines ;)
438.
by qnleigh 3y ago
To drive this point home, something a friend of mine pointed out: "Retrispective Case control in offspring disease settings have incredibly severe measurement error issues because the moms of cases are trying to think of things they mi
439.
by qnleigh 3y ago
Tangential but hopefully related enough to be of interest; is there similar variability with the "mind's ear?" If you imagine someone saying "hello," does it make sense to then ask things like whether the voice was
440.
by qnleigh 3y ago
That also sounds safer..
441.
by qnleigh 3y ago
I'm not the best person to answer this, but my understanding is yes. The claim is that it's an almost ubiquitous phenomenon; many theories, I think even including non-supersymmetric theories, have something similar going on where
442.
by qnleigh 3y ago
Fascinating that this is getting so much traction on Hacker News, given how technical and physics-specific it is. Guess there's a lot of physicists on here (hi all!) This PDF is a summary of a really interesting and surprising research
443.
by qnleigh 3y ago
It's good to have people pushing back against the hype, as it gets a bit out of hand. But this article is completely wrong. Rather than pointing to research that refutes quantum error correction or the threshold theorems, he just waves
444.
by qnleigh 3y ago
It won't have a direct impact on quantum computing. People make qubits out of superconducting materials that become superconducting at 4K or higher, but you have to cool them to around 0.03 K for them to really work well as qubits. See
445.
by qnleigh 3y ago
This is an good point. I think there is a difficult balance to strike between open communication and adding confusing noise to the scientific literature. Partly for historical reasons, there is an expectation that published science is corre
446.
by qnleigh 3y ago
That's right. The standard way to measure resistance without being sensitive to contact resistance is called the four-terminal method, see ( https://en.m.wikipedia.org/wiki/Four-terminal_sensing ). You drive a curre
447.
by qnleigh 3y ago
His criticism of figure 1b doesn't seem reasonable to me, given that the are resistance measurements in 1a and 1c that show zero resistance coming and going in roughly the expected way as a function of temperature and magnetic field. U
448.
by qnleigh 3y ago
I can't read the entire python documentation in an hour. And having never taken a programming class or worked alongside a professional software engineer, I only know what it's occurred to me to look for. Python has lots of tools t
449.
by qnleigh 3y ago
I realized at some point that in learning languages, I was often limited by how much vocabulary I was picking up. The main advice I got was to read more, but progress was slow; I learned less from more basic texts, but constantly had to loo
450.
by qnleigh 4y ago
"But for computational systems... there’s my Principle of Computational Equivalence—which implies that all these systems are in a sense equivalent in the kinds of computations they can do." Am I missing this, or is he restating th

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