keldaris

26 ms·

211.
by keldaris 8y ago
LIGO and the Higgs boson example are both extreme outliers in physics in terms of scale, how much statistics they necessarily involve, the scrutiny and publicity they get and almost every other property. I'd also note that scientists t
212.
by keldaris 8y ago
In my experience as a researcher in physics (obviously anecdotal to my field and not generalizable across physics) all we do are variations on Stage 1 - we either have a model, a prediction and an experiment that confirms it (these go to th
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by keldaris 8y ago
That's a neat example, thanks!
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by keldaris 8y ago
Sure, as long as you don't expect anyone to complete the course or are willing to play catch up for most of the semester. In other words, I'd love to plan courses that way, but no university administrator would ever let me (instea
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by keldaris 8y ago
I think that last point really needs to start with a thorough reform of basic mathematical education (starting from undergrad calculus) to have any chance of real success. The present mish-mash of notations, however disjointed, lends itself
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by keldaris 8y ago
In my personal experience physicists are usually rather pragmatic about these things. Not many will support a "project of moving to geometric algebra" for its own sake, or the sake of perceived mathematical elegance - I know I wou
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by keldaris 8y ago
I'm no fan of the i9 series at all, but if you have SIMD-heavy workloads (especially anything you're willing to port to AVX-512), those CPUs actually make a lot of sense price/performance wise. It's a fairly specific nic
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by keldaris 8y ago
His statement is particularly hyperbolic given that no one has shown a working side channel attack on a Ryzen CPU that relied on SMT. The article is littered with repetitions of suspicion, but there hasn't been any relevant code or res
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by keldaris 8y ago
Freeman Dyson would be one example. Note that this isn't an endorsement of his positions or a statement on the general question, I'm just providing the example of someone who isn't obviously unreasonable and has clearly thoug
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by keldaris 8y ago
Naive question from a computational physicist with no quant experience - if you forgo closed form pricing anyway, there doesn't seem to be any obstacle to including all of the things you mention in your last paragraph (and more) and ju
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by keldaris 8y ago
I've had high myopia since childhood and for me the effect hasn't diminished (comparing between my annual checkups). I don't know any reliable statistics for this, however, only anecdotal experiences and consultations with my
222.
by keldaris 8y ago
I agree with everything you said except the last sentence. The (temporary) effect of atropine is well known and uncontroversial, anyone with severe myopia will tell you the same thing - after it takes effect, you'll be able to easily r
223.
by keldaris 8y ago
It is my understanding that atropine (like scopolamine, cyclopentate, etc.) effectively paralyzes the ciliary muscles by blocking muscarinic receptors. This enables an ophtalmologist to measure the "true" refractive error of the e
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by keldaris 8y ago
Not quite true. The ciliary muscles and suspensory ligaments in your eye are largely responsible for ensuring the accommodation-convergence reflex (the process by which your eye focuses on objects at different distances) works properly. It&
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by keldaris 8y ago
This is very off-topic, but if you ever feel like sharing your web development process in a blog post (or any other medium), describing how you stay productive doing a website from scratch, I'd love to read and share it. There is a rea
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by keldaris 8y ago
Your website is an example of what good web design should look like. It's fast, clean, doesn't load extraneous crap and almost all of it works without JavaScript (which I block by default). Most "Show HN" posts I open an
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by keldaris 8y ago
I have pretty terrible eyesight, so the IPS screen is okay by my standards. Probably not the case for most people, admittedly.
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by keldaris 8y ago
They're good keyboards by modern standards, but they're still worse than the keyboards on classic Thinkpads (up to X220/T420/T520), both in terms of feedback (both tactile and sound) and the layout. The X210 looks marvel
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by keldaris 8y ago
I'm specifically talking about open source communities. I think the context of these social structures (spontaneous organization, lack of traditional coercive motivators (money, enforcement mechanisms, social pressure), the fact that m
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by keldaris 8y ago
A bunch of old X220 machines are still my only laptops to this day because I simply haven't found anything better since. Every modern laptop I've seen is vastly inferior in some aspect I care about - terrible keyboards, fragile ca
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by keldaris 8y ago
Saying that code of conducts are irrelevant does not imply that the problems supposedly solved by CoCs do not exist or are not problems. This is a point of basic logic. If you feel the need to misstate your case to this extent, it does not
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by keldaris 8y ago
CoCs on their own solve exactly nothing, they're just a tool that's supposed to enable project leadership to solve certain issues more effectively. Whether they actually serve that function is an open question since the practice i
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by keldaris 8y ago
This is a lovely piece of satire given the prevailing obsession with silly CoCs all around.
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by keldaris 8y ago
This is a nice benchmark, thanks for doing it, but the point I was making is somewhat orthogonal to this. Of course there's a performance advantage from using 512 bit registers for a memcpy - but a memcpy is rarely a major performance
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by keldaris 8y ago
Right, if you stick to 128 bit registers, you avoid most of the issues. Does that get you much benefit for a memcpy over an SSE implementation on a SKX CPU? I don't think so, but I haven't looked into that particular problem, so m
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by keldaris 8y ago
The issue - and one that a compiler often can't really reason about very well - is that in using AVX (and especially AVX-512) you incur other performance costs due to throttling the CPU down to lower frequencies and having additional l
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by keldaris 8y ago
It is clearly mentioned in a separate paragraph which reads: > For this article I'm going to choose CuArrays, since this article is written for Julia 0.7 / 1.0, which still isn't supported by CLArrays.
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by keldaris 8y ago
I agree with your broader point, but stating that Nvidia comprises a mere 5% of the world's hardware is disingenous in a post where you've only talked about GPUs. In actual fact, Nvidia has the overwhelming majority of the high en
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by keldaris 8y ago
Humans do seem to generally prefer the company of those with a sufficient degree of shared traits, interests and preferences. Being an extreme outlier in IQ, as in any other area, may just make it statistically harder to find such company.
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by keldaris 8y ago
That it does and there's also plenty of convenience wrappers of various kinds for different languages. Unfortunately, none of that can address the ecosystem issue, which is the one that really matters.

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