hpcjoe

64 ms·

481.
by hpcjoe 9y ago
Ok. So the law of gravity is the law. No matter what I say, right?
482.
by hpcjoe 9y ago
Respectfully, I disagree on both claims. Fact in law is not the same as a fact in science. Scientific "law" is an artifice, more of something created by someone attempting to explain using a poor mapping of language to the way sci
483.
by hpcjoe 9y ago
FWIW, and I use this example in discussions with non-scientists all the time, Newtonian Gravity, aka the "Law of Gravity", not only isn't a fact, it isn't even correct. General relativity appears to be a closer approxim
484.
by hpcjoe 9y ago
One specifically negative thing about gdocs ... well ... gsheets ... is that if you create a document with many (e.g. > 5 or so) charts on a single page ... it will slow waaaaaaayyyyy down. Multi second latency/response times for t
485.
by hpcjoe 9y ago
and in Perl6, and in Julia. Julia is likely more popular than P6 though.
486.
by hpcjoe 9y ago
Hrmmm. I thought something was fishy with the statement: "Tangent: in the real world, there are no real numbers". The reals are defined as the set of all rational and irrational numbers on the number line. See https:/&#x2
487.
by hpcjoe 9y ago
Heh ... in grad school, one of my friends was a postdoc working on computing bounds for the Higgs mass. He used to tell me (theoretical condensed matter) that I worked in the dirt left over from the real physics. Fast forward 20+ years, an
488.
by hpcjoe 9y ago
I lucked out having the Soviet Union collapse and flood the market with physicists when I was looking. No wait. Thats sort of the opposite of luck. [edit] School was unaffordable for me at any of the 10 places that accepted me and offered
489.
by hpcjoe 9y ago
Back in grad school, many of us called our stipends "welfare for middle class kids who couldn't get a job." When I was deciding between academia and industry in the mid 90s, the postdocs I was looking at in physics were payin
490.
by hpcjoe 9y ago
Yeah, there were some serious faulty elements of the article. That was just one. Apart from that, I'm not aware of experiments that measure absolute phase, only relative phase differences. But I've been out of physics for 20+ ye
491.
by hpcjoe 9y ago
I like that they talk about their favorite tools and toy models. In grad school, I had a number of toy models and I got to use some of my favorite tools in my research/thesis write up. For me, one of my favorite tools was a form of pe
492.
by hpcjoe 9y ago
Well ... no. The value of c is specific to the medium. In "empty" space, c is the constant we know and love, and is related to the permittivity and dielectric constant of the vacuum. Specifically with a classical E-M model, when
493.
by hpcjoe 9y ago
I hate to be blunt, but the moral of this story is that you should not trade good operational practice for some personal preferences. Distros generally don't matter, until they do. Choices made at the distro level, like, hey lets bui
494.
by hpcjoe 9y ago
Relativistic DFT ... Brings back memories. I did non-relativistic DFT to model III-V materials in the early 90s. Basically building GaAs, InAs, etc. on supercomputers using a set of codes we got from another research group, that we modifi
495.
by hpcjoe 9y ago
One of my favorites is Derek Lowe's write-ups on things he won't work with. Things like FOOF[1], Peroxide Peroxides[2], Azidoazide Azides[3]. The first reference is quite entertaining ... "“Being a high energy oxidizer, dioxy
496.
by hpcjoe 9y ago
I had one which was "this is trivial, and shouldn't take you more than an hour." Which after looking at their very unclean data set they wanted to perform analytics on (lots of missing/incorrect/... data), and the
497.
by hpcjoe 9y ago
+10 on the networking. Use LinkedIn, leverage any/all connections. Reach out to people, let them know you are looking. +1 on the ATS. They are a waste of your time, generally. If you see an interesting position, try to find an &quo
498.
by hpcjoe 9y ago
I saw the "Two Years" comic [1] while my wife and I were on our first year [2][3]. "Seven Years" is meaningful to me as our 6th year anniversary of the surgery is in 14 days. [1] https://xkcd.com/1141&#x
499.
by hpcjoe 9y ago
It is worth pointing out that really fast is ... well ... really fast. See [1] for some benchmarks they did for small, medium, large data sets. The machines that $dayjob-1 used to build dominated the STAC-M3 for a few years (2013-2015) bec
500.
by hpcjoe 9y ago
> Are you sure about that? To my knowledge, Debian 9 is still using the good old network scripts. I'm 100% about Debian 8 since that's why I use in production, with systemd-networkd nowhere to be seen. The last job developed&#x
501.
by hpcjoe 9y ago
Specifically in Debian 8 and Debian 9, systemd-networkd is the default used to bring up interfaces. Controlling it is very hard for any less "traditional" use cases. On egregious settings, google is your friend. However, here ar
502.
by hpcjoe 9y ago
I have. At my previous company, I built single system storage units for our large scale distributed storage systems that had between 100-500TB of physical storage in a single box. Linked together via infiniband, 40/100 GbE, and other
503.
by hpcjoe 9y ago
Exactly
504.
by hpcjoe 9y ago
Yes, this was what I was trying to convey. Customers (when I ran my company) explained it to me in terms of Moore's law. They could wait 5 years for 1 order of magnitude (back then). Or I could deliver that (near) order of magnitude
505.
by hpcjoe 9y ago
The business model for these sorts of things should be "target ubiquity". Think GPUs. Huge computational power, low cost per computational power unit. The problem becomes that Power9 is now effectively a substrate machine for NV
506.
by hpcjoe 9y ago
This. +1000. When you are the person worrying about making your number on a monthly basis, so you can pay your team ... whom aren't worried about this, because they get a salary ... and you sometimes/often can't pay yourself,
507.
by hpcjoe 9y ago
[not trying to hijack the discussion, but I think a meta-discussion is in order based on comments I've seen on this article] The article is about whether or not you can actually parse Perl without running Perl to parse itself. One of
508.
by hpcjoe 9y ago
Not true. I've regularly demonstrated very high throughput/connectivity with lots of little connections. The problem I have seen (not only with linux) has been over-aggressive congestion controls, usually configured/set wro
509.
by hpcjoe 9y ago
> Then you and your friends weren't fluent enough with algorithms. That is the point, they don't care about all of your degrees, years of experience, conferences etc, they care about your fluency with maths and algorithms. I d
510.
by hpcjoe 9y ago
Not true. I've got a Ph.D. in theoretical physics, am very math heavy, created a number of algos for my work over the last 25+ years (in physics sim, bioinformatics, systems management/orchestration, etc.), run sessions at an ACM

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