gnufx

62 ms·

721.
by gnufx 6y ago
> No, background radiation makes nuclear radiation a noisy and ambiguous signal. You make a decent measurement -- my former speciality. That's not waving a Geiger counter surrounded by concrete or granite. (It just wouldn't h
722.
by gnufx 6y ago
OSM is noticeable by absence of any mention I can see on the web site, sadly, and it's not even clear the data will be licensed compatibly. (The OSM UK mail list demonstrates the obsession^Wcare which at least some contributors devote
723.
by gnufx 6y ago
As I understand from chekcing how to do it, designations in Openstreetmap are supposed to be done on the basis of signs on the ground and verifying the route by walking it (combined with local authority reference data, which I understand is
724.
by gnufx 6y ago
Right, but the simple, reliable measurement is the nuclear radiation if someone is claiming a nuclear process.
725.
by gnufx 6y ago
In the absence of real nuclear physics data, the only thing available for experts to criticize if the lack of those data.
726.
by gnufx 6y ago
It's a characteristic of this stuff claiming to be doing nuclear physics that you actually avoid real nuclear physics (gamma and neutron detection) and possibly hand-wave it away like that. I used to study sub-barrier fusion reactions
727.
by gnufx 6y ago
I don't know that it needs Crapita, given Deloitte, Serco, G4S ... already.
728.
by gnufx 6y ago
> it is usually much easier to reach that throughput with AVX-512 than with AVX/AVX2 That's not what I understood from people who've gone through the exercise for GEMM. One probably relevant measurement: on BLIS' gen
729.
by gnufx 6y ago
Yes, if you have two AVX512 FMA units, you use them for GEMM; with a current microarchitecture implementation, if you only have one, you don't. https://github.com/flame/blis/blob/2d8ec164e7ae4f0c461c27309
730.
by gnufx 6y ago
The physics interest in this which tends to get quoted is related to possible variation of the fine structure constant. I was trying to remember what I think was the original paper in that vein, placing limits on strong, electromagnetic, a
731.
by gnufx 6y ago
Since this mentions variation of the fine structure constant: studies of the Oklo reactor, which has recently come up again at https://news.ycombinator.com/item?id=24739302 show no evidence of that over a relevant timescale
732.
by gnufx 6y ago
I've been through the exercise. It's obviously tedious and fragile, and not always possible, as far as I remember. I can't give an example of something that wasn't listed, but I at least have queries against D series a
733.
by gnufx 6y ago
Fair enough. I've just never come across 1 FMA versions, despite trying to enumerate them -- doubtless computational bias.
734.
by gnufx 6y ago
In what way? I don't see any fundamental difference between discovering GNU/Linux packages and Android ones (in the "stores" I've used -- f-droid, /e/ apps, and Aurora).
735.
by gnufx 6y ago
See https://esolutions.shop/
736.
by gnufx 6y ago
> The cheaper models with only one AVX-512 FMA unit have a lower throughput, which will be exceeded by Zen 3, even at the same clock frequency. I think there are relatively few with only one FMA (and there's no way of interrogating
737.
by gnufx 6y ago
> When I last checked, MKL was much faster than its competitors That has never been generally true in my experience measuring over the years. It has been true at times for specific cases, e.g. OpenBLAS until it got avx512 support on a p
738.
by gnufx 6y ago
> There are also things like Intel MKL There are also things like OpenBLAS, and BLIS (which AMD support).
739.
by gnufx 6y ago
Which applications, and why? Some computational ones will go significantly slower on the same number of cores if they could have kept avx512 fed (perhaps small data in cache), but most don't spend all their time in something like GEMM
740.
by gnufx 6y ago
Yes, ultimately I suppose all(?) plastics are from plants, possibly via geological processes. I don't know what the legal definition would be, and the packaging which says "plastic free" might well contravene it, but at leas
741.
by gnufx 6y ago
They say they're made from vegetable material (for the containers, I think) and wood for the window, but I don't know what that actually means, of course.
742.
by gnufx 6y ago
The recycling label, presumably.
743.
by gnufx 6y ago
I wonder if this is the same material I've recently come across as transparent containers sauces and the window in cardboard packaging, which are supposed to be "industrially compostable".
744.
by gnufx 6y ago
z/VM can't read a 1970s format? Oh dear, but at least the hardware was available. Brings back not so happy memories of coping with other labs' random tape formats and the lack of 7-track drives for historical data that was o
745.
by gnufx 6y ago
What's the advantage of enroot over charliecloud, which is unprivileged in the sense of being installable in your home directory (given user namespaces)? https://hpc.github.io/charliecloud/
746.
by gnufx 6y ago
LD_PRELOAD is the normal way to add instrumentation on ELF HPC; it's more-or-less assumed by the MPI profiling facility. I'm surprised that LD_PRELOAD should be news to anyone at this stage, though. For instance, glibc has hooks
747.
by gnufx 6y ago
You don't need anything special to say you have relevant exceptions. GCC with a benchmark set currently in progress (which has other problems): Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG The &quo
748.
by gnufx 6y ago
I don't see a reference to Siméon and Wadler: "So, the essence of XML is this: the problem it solves is not hard, and it does not solve the problem well." http://homepages.inf.ed.ac.uk/wadler/papers&#x2F
749.
by gnufx 6y ago
No, see CTAN.
750.
by gnufx 6y ago
Right, but people seem remarkably reluctant to use the facility which is just there, and it might even be proscribed for systems that aren't "joined to AD", for unexplained reasons. If ephemeral certificates are also used, y

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