vilhelm_s

14 ms·

91.
by vilhelm_s 5y ago
Surely the air is still interacting with the airplane. The shockwave generated by a body shaped like an acute cone is a (somewhat less acute) cone with the same apex. Inside the shock wave, the air gradually turns around to move parallel to
92.
by vilhelm_s 5y ago
I really doubt that. If we focus in particular on bike theft (one of the examples above), some webpage says that Norway had 60k bike thefts in 2004, 20k of which was reported to the police[1]. This is out of a population of 4.5 million. Som
93.
by vilhelm_s 5y ago
The Nature paper that this press release talks about is [0], and even better, the same issue of Nature also published an accompanying "News and Views" explanation of the paper for non-experts [1] which I thought was clarifying: &g
94.
Counterexamples in Type Systems(counterexamples.org)
3 points by vilhelm_s 5y ago|0 comments
95.
by vilhelm_s 5y ago
The original post also says > The Pendolino itself is a fine product, with the tilt removed. Alstom uses it as its standard 250 km/h train, at lower cost than 350 km/h trains. It runs in China as CRH5, and Poland bought a non-t
96.
by vilhelm_s 5y ago
Yes, making a mistake when writing down the C semantics is definitely possible. The point of the work announced here is to get rid of that risk, so that the proof only relies on the semantics of the RiscV instructions (and the C semantics b
97.
by vilhelm_s 6y ago
I think these objects are maybe true but not relevant. The leading example of the article was about Zooom videos, not single frames, and in a school setting you presumably know what culture the students are from, so I don't think you n
98.
by vilhelm_s 6y ago
In the next issue, the journal published a bunch of letters noting that she had rediscovered the trapezoid rule. https://kconrad.math.uconn.edu/math1132s20/handouts/taicomme... Mary Tai herself also replied and ex
99.
Our Voice Assistant Spoke to Google Duplex(polyai.com)
1 points by vilhelm_s 6y ago|1 comments
100.
by vilhelm_s 6y ago
Yes, that's right. > The first stage of this project will explore the feasibility of exposing healthy volunteers to COVID-19. In this initial phase, called the Virus Characterisation Study, the aim will be to discover the smallest a
101.
by vilhelm_s 6y ago
Similarly, newly built or renovated houses will have some "new house" smell, which is also VOCs. I have been told there is a cultural difference between China and the U.S., where Chinese people will let a house be empty for a few
102.
by vilhelm_s 6y ago
One thing I don't understand is that the dataset already comes with a "train dataset" (120 recordings) and "test dataset" ("Recordings of 22 repetitions of 7 narrative test set videos"). Why are they not j
103.
by vilhelm_s 6y ago
Telescopes etc are already designed to give the same perspective and foreshortening effects as a "simple" lens or a pinhole camera. There can be some imperfections (e.g. "barrel distortions"), but these are pretty small.
104.
by vilhelm_s 6y ago
Oh I missed that!
105.
by vilhelm_s 6y ago
I think you overestimate the energy in uranium. 8000GWh per tonne and year would be 28.8 TJ/kg, while the numbers I have seen is more like 0.7 TJ/kg ( http://www.plux.co.uk/energy-density-of-uranium/ ).
106.
by vilhelm_s 6y ago
Googling a bit: it takes about 13 MJ to desalinate 1 m^3 of water by reverse osmosis. Seawater contains 3mg uranium per m^3, which gives 2 MJ, So it's not energy positive.
107.
by vilhelm_s 6y ago
In an ideal frictionless gas (zero viscosity), the flow after the object has passed through will be identical to the flow before the object, so in that sense the air moves "seamlessly" around the object. But during this process, t
108.
by vilhelm_s 6y ago
I thought this would be http://hackersdictionary.com/html/Some-AI-Koans.html .
109.
by vilhelm_s 6y ago
From the NIF website, > The facility is funded by the U.S. Department of Energy’s National Nuclear Security Administration (NNSA) and is a key element of NNSA’s science-based Stockpile Stewardship Program to maintain the reliability and
110.
by vilhelm_s 6y ago
Yeah, the Esri fillOpacity property just becomes an SVG property, and the SVG specification requires that it gets clamped to [0,1] before rendering. In addition to computing the quartiles correctly, I also realized you should probably use (
111.
by vilhelm_s 6y ago
I experimented a bit with the source code at https://github.com/tuttlepower/VotingMap , you can add an area correction by changing the line fillOpacity: (us_votes[i].total_votes / 59828), to something lik
112.
by vilhelm_s 6y ago
I was thinking the same thing. According to Wikipedia, the county areas vary by three orders of magnitude, from San Bernardino County, California (51,947 km^2) to Kalawao County, Hawaii (31 km^2), so it seems it can be very misleading. For
113.
by vilhelm_s 6y ago
I think you are thinking of the accident in Goiânia (Brazil) in 1987, but this article is actually about the accident in Ciudad Juárez (Mexico) in 1983. There have been quite a few accidents involving radiation sources from disused radiothe
114.
by vilhelm_s 6y ago
The announcement is given at a press conference, so the reporters learn it at that time. The link above says that they try to call the winners a few minutes before it is announced at the press conference, but like your quote says, Doudna mi
115.
by vilhelm_s 6y ago
I think at least the sales pitch is that the new magnets is all you need, and apart from that it uses the same well-understood technology that ITER is based around. https://www.psfc.mit.edu/files/psfc/imce/res
116.
by vilhelm_s 6y ago
I mean, you began this thread by saying that they've added a new regulation on waste heat and nobody knows how to build a cooling system that satisfies it. Maybe we can begin by repealing that one and go from there...
117.
by vilhelm_s 6y ago
And indeed, in Scheme (the language that originally made tail recursion famous) you can get stack traces from loops too! Well, at least in one Scheme implementation, MIT Scheme. The MIT Scheme debugger has a notion of "reductions and s
118.
by vilhelm_s 6y ago
Back then you probably couldn't electronically withdraw money from someone's account with just the account number---it has become more sensitive later.
119.
by vilhelm_s 6y ago
Right. There was some previous discussion on Hacker News about this under the headline "Polio eradication program faces hard choices as endgame strategy falters" [ https://news.ycombinator.com/item?id=21920406 ].
120.
by vilhelm_s 6y ago
The article seems nonsensical in the same way, though. > For plants, blue is achieved by mixing naturally occurring pigments, very much as an artist would mix colours. The most commonly used are the red pigments, called anthocyanins, and

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