lambdatronics

35 ms·

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by lambdatronics 6y ago
If I were to do that, I'd use Julia for it. This is a great post about why it's important to have specialized programs -- you can make simplifying assumptions that speed up computation. Multiple-dispatch in Julia allows to hide
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Unsupervised Learning via Total Correlation Explanation(arxiv.org)
2 points by lambdatronics 6y ago|0 comments
363.
by lambdatronics 6y ago
I'm not an expert on GR, but basically: energy density and mass density are summed up in the Einstein field equations to get the metric tensor that determines the curvature of spacetime. We can measure the curvature, so we can measure
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by lambdatronics 6y ago
It's a little different in general relativity, because the mass-energy equivalence implies there really is a zero point -- the gravitational energy of the planet would itself add to the apparent mass of the planet, in the same way that
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by lambdatronics 6y ago
Yes, but you're missing the point. In 1950's sci-fi, those marvels were possible because there was imagined to be something like a general artificial intelligence behind the technology. We've achieved narrow AI, but the p
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by lambdatronics 6y ago
Here it is: https://generalfusion.com/wp-content/uploads/2016/08/Suponit... Edit: Here's a second one that's similar (but behind a paywall). http://www.sciencedirect.com/science
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by lambdatronics 6y ago
Yup. There's also the need to maintain transparency of the first wall to neutrons so the tritium breeding ratio stays above 1. However, a very thin wall is easy to breach in the event of plasma eruptions, or even long-term erosion due
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by lambdatronics 6y ago
This is underappreciated. Achieving sufficient confinement pushes toward larger volume/surface area, but getting high power density pushes the other way. In a way, the fact that 80% of the DT power output is in fast neutrons becomes b
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by lambdatronics 6y ago
I heard that the shock wave was spalling off the front few cm of the liquid metal wall as a spray of jets/droplets -- the shock reflects from the vacuum interface & where the wave interfered destructively with itself, the pressure
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by lambdatronics 6y ago
Absolutely! I wish this were more commonly understood. And, if you take that train of though one step further, it implies that quantum mechanics exhibits non-local causality.
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by lambdatronics 6y ago
The first time I tried to read it, I got frustrated with his style and quit -- I had been skimming over the story parts to get to the philosophy, and it was exhausting. I liked it better the second time when I wasn't as rushed. For me
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by lambdatronics 6y ago
Depends on how good your control system is: https://youtu.be/Y_0LW0iaRfQ?t=43
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by lambdatronics 6y ago
Less to go wrong -- foil kites can become tangled in their bridle lines due to fluctuating wind which lead to a stall. Tangled lines can prevent the safety release mechanism from depowering the kite: https://youtu.be/pU0mEWK
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by lambdatronics 6y ago
Nobody understands quantum mechanics. Lots of people know how to apply it. I don't think quantum technology is going to go anywhere until physicists revamp the theory & the pedagogy in a way that makes it comprehensible. I say t
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by lambdatronics 7y ago
How far do you think we could get with merely a friction-free method to pay a small fee to read individual articles across a broad range of publications? I'd be concerned that if pay-per-view articles became the norm, clickbaiting woul