ealloc

7 ms·

1.
by ealloc 2y ago
> [if] you want to retain as much precision as possible and still use floats, don't store it in a float with range [0.0,100.0]. Store it with the range [0.0,1.0]. I just tested this out and it doesn't seem true. The two storing
2.
by ealloc 3y ago
How is CUDA-C that much easier than OpenCL? Having ported back and forth myself, the base C-like languages are virtually identical. Just sub "__syncthreads();" for "barrier(CL_MEM_FENCE)" and so on. To me the main proble
3.
by ealloc 4y ago
Did you read in English? I read it in french and loved it, then looked at Montcrief's translation - I would not have made it through. Montcrief turned Prousts clear and precise (but long) sentences into a kind of esoteric word puzzle.
4.
by ealloc 5y ago
That would be a straight-up, avoidable software/hardware bug: The incoming timestamp is incorrect, and garbage in is garbage out. That would make me curious how the timestamp error occurred: software, hardware? Camera or Navigation cod
5.
by ealloc 5y ago
The article says the problem was a dropped frame from the camera, but that just further piques my curiosity: Presumably they use some kind of Kalman Filter, but those are easy to program to account for missing frames, or frames at non-discr
6.
by ealloc 6y ago
Sperm cells can be seen as a haploid phase of many organisms' lifecycle, so are alive by pretty much any definition. In humans, the haploid phase of the lifecycle is single-celled, while the diploid phase is multicellular. In contrast,
7.
by ealloc 8y ago
It may be coming back though. IBM's new and rising supercomputer architecture, POWER9, supports hardware IEEE binary128 floats (quad precision). Their press claims the current fastest supercomputer in the world uses POWER9. The ppc64 a
8.
by ealloc 8y ago
Yes, forces transmitted through fields act "at a distance", but is that really "spooky"? Do you think it is "spooky" that if you make a wave at one end of a pond, the wave reaches the other end? I don't. I
9.
by ealloc 8y ago
No it isn't. There is still plenty of debate about the philosophical implications of Bells' inequality. See for example this 2014 PNAS article "Quantum nonlocality does not exist": http://www.pnas.org/con
10.
by ealloc 8y ago
I've read Chomsky's opinion on this before in his essay ""Science, Mind, and Limits of Understanding", and I think he misunderstands the physics. He seems to think Newton accidentally disproved the concept of locali
11.
by ealloc 8y ago
I use a huge amount of open-source software which I do not believe is subsidized. Some is, eg some linux/gnome devs are paid to contribute. But many smaller projects/components are volunteer-only.
12.
by ealloc 8y ago
Bitcoin has both fees and delays. You can see what they are now: https://bitinfocharts.com/comparison/bitcoin-transactionfees... https://blockchain.info/charts/avg-confirmation-time Who knows what
13.
by ealloc 9y ago
> Universities will just start offering education for free instead of waiving the tuition Aren't you supposed to be taxed on the value of a good/service/gift received even if it was given to you for free? What is the &quot
14.
by ealloc 9y ago
The book was written in 2002, and I just looked up Nick lane's latest 2016 take on it here: [1] His point in this new article is that instead of one big "oxygenation event" there may have been multiple. But he sticks to his s
15.
by ealloc 9y ago
The reason water exists on earth, and not on mars, may be that life on earth saved the water by discovering photosynthesis. The discovery of photosynthesis caused the "great oxygenation event" which pumped oxygen into the atmosphe
16.
by ealloc 9y ago
A trick for dealing with periodic coordinates, not discussed in the article, is to convert each periodic coordinate (eg, an angle theta) into a pair of cartesian coordinates (x,y) on the circle, and then compute the distance in cartesian sp
17.
by ealloc 9y ago
"Single Particle Reconstruction" for Cryo-EM reconstruction algorithm, anyone? SPR is an algorithm already used to reconstruct 3d objects from a set of 2d images produced by an electron microscope, typically of a protein on a flat
18.
by ealloc 9y ago
Summary: -- Their trades are profitable f = 51% of the time, and they do N = 3 million trades per day. -- Their net profitability per day is thus (well approximated by) a normal random variable with a mean of f and a standard deviation of s
19.
by ealloc 9y ago
An example of what I would consider red-light camera abuse: Philadelphia has a number of red light cameras which each generate about 10,000 tickets a year. That's about 30 tickets a day for each camera, $100 per ticket. 12 cameras ge
20.
by ealloc 10y ago
My impression is that physicists who say this usually don't know much about the theory and evidence for evolution. (I am trained in physics, I now do biophysics). What about the beautiful and often very precise linear relationship betw
21.
by ealloc 10y ago
Follow the money: "This work was supported by the Army Research Office (ARO) in the form of a Multidisciplinary University Research Initiative (MURI) (grant number: W911NF-13-1-0387)" -- from the acknowledgements of the paper.
22.
by ealloc 10y ago
Peter Wadham, head of the Polar Ocean Physics Group at University of Cambridge, has repeatedly made claims that Arctic sea ice will melt "next year". Eg in 2012 he predicted it would fully melt in sept 2016. Since that didn't
23.
by ealloc 10y ago
Melting Arctic ice also changes the surface albedo so more solar energy is absorbed, it changes the ocean salinity, and no longer cools the winds above it. Thermal expansion of the ocean contributes almost half of total observed sea level r
24.
by ealloc 10y ago
A lot of journals are starting to do this. For example PNAS (a top ranking journal) introduced a required "significance statement" in addition to an abstract, which is meant to be understood by a more general audience. So do the P
25.
by ealloc 10y ago
Probably it is referring to the overlap in mathematics between condensed matter and particle physics. Both fields can be seen as explorations of the mathematical framework known as Quantum Field Theory (with somewhat different interpretatio
26.
by ealloc 10y ago
There was a lot of inspiration the other way too, though. Here are two little instances I came across recently where the french copied their rhetoric and symbolism from America: In 1787 Thomas Jefferson said, "The tree of liberty must
27.
by ealloc 10y ago
You can download Craig Venter's genome here: http://hgdownload.soe.ucsc.edu/goldenPath/venter1/bigZips/ However, the human "reference" genome (the updated main product of the Human Genome Proje
28.
by ealloc 10y ago
As a maintainer who sometimes requests PR submitters to make style changes or even squash their PRs: Please tell me you don't want to finish it so that I can do so. I am reluctant to merge your PR if it has too many style issues or imp
29.
by ealloc 10y ago
I wouldn't describe TeX as a "standard", but it's pretty hard to argue that it's "closed": TeX is arguably the best documented program in history! Knuth wrote it using his novel "literate programming&
30.
by ealloc 10y ago
A lot of experts disagree with you that this is an open-and shut-question, including leaders in the field of population genetics. It is by no means so clear cut. Below I've linked a nice blog post on the question, as well as a Nature r

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