weichi

9 ms·

31.
by weichi 13y ago
Any recommendations for getting a titanium ring enlarged? I can't imagine you could stretch the damn thing. Maybe I would need to find a shop to bore out the hole some more?
32.
by weichi 13y ago
Hard to comment without seeing more concrete examples of his approach. But it makes me wonder whether processors are now so fast that, for a large class of numerical problems, the default should be to give up calculational speed in return f
33.
by weichi 13y ago
For programmers interested in classical mechanics, "The Structure and Interpretation of Classical Mechanics" is a highly unique - and outstanding - introduction to Lagrangian and Hamiltonian mechanics. Available free online: http://mitpres
34.
by weichi 13y ago
Not sure exactly what you mean by "active", but there are plenty of cryocoolers that work great at temperature below 1.4 K, some of which are also qualified for space. So there's no physical reason for Herschel to not use a cryocooler. But
35.
by weichi 13y ago
It's not really the case normal metal transmission lines don't have some "extra" L, is it? The magnetic field still penetrates into any real metal, so you have some extra inductance. But I agree that it's very important to understand that a
36.
by weichi 13y ago
Interesting article. A nit that can be picked is that it is not generally true that electrical signals in copper travel slower than c. The reason the signal travels slower than c in an ethernet cable is that the copper is surrounded by diel
37.
by weichi 14y ago
The details of the proofs are perhaps not relevant to a practitioner. Although I trust you would agree that the existence of the theorems are very useful? You seem to have the idea that the only useful thing to come out of linear algebra
38.
by weichi 14y ago
I hope the author is reading your comments, because they make it clear that at least one of his readers is coming away with seriously incorrect ideas about linear algebra! The thing that you are missing is that linear algebra is about much
39.
by weichi 14y ago
Sounds to me like the tech reporting industry is in serious need of disruption.
40.
by weichi 14y ago
No, and the smallness of the force has nothing to do with it. While it's true that there's a force between two metal objects that you could use to do some work, this doesn't get you energy for free because you had to do some work yourself i
41.
by weichi 14y ago
A very good post on this by Matt Strassler from earlier this year: http://profmattstrassler.com/articles-and-posts/particle-phy... There were apparently two problems: 1. An improperly calibrated clock 2. A fiber optic cable was not fully
42.
by weichi 14y ago
If we can't trust SO for security questions, where do we go to get them answered?
43.
by weichi 15y ago
Interesting article, and as a forty-year-old who doesn't use facebook, it makes sense to me. But I wonder whether 20 year-olds who have been immersed in this kind of thing for 3-4 years would agree. And what today's 13-year-olds will think
44.
by weichi 15y ago
Trio's (Fisher Price) are a similar toy to legos, aimed at the 3-5 y.o. range. The lid to the box is a board that the pieces snap into to help build up fun stuff. We don't even really have than many of them (no more than 100 pieces) but the
45.
by weichi 16y ago
Heh, well honestly I don't know all that much about elementary school staffing either! But I do know a few things about children, and you simply can't put a large number of them in a space together without adult supervision and expect much
46.
by weichi 16y ago
Are you seriously suggesting that the average elementary or middle school could "greatly reduce" it's staffing requirements? As someone else pointed out, teachers aren't just there to teach; they also serve as childcare providers. There's p
47.
by weichi 16y ago
OK, this all makes sense. But why does it matter? Am I as a programmer going to make mistakes if I try to write programs in a "what" manner instead of a "how" manner? Is there some other, better distinction that I should be making? Are you
48.
by weichi 16y ago
I think what and how are the same thing. I'm really surprised by this statement, and I hope you will expand on it. I think the example of relational databases and SQL (which is very close to the example in the blog post) demonstrate concl
49.
by weichi 16y ago
But Hanson doesn't say "Why don't the study's authors discuss possible explanations for this finding, such as xxx?" Instead, he insinuates that the authors were perfectly aware of this possible explanation, but think that their readers shou
50.
by weichi 16y ago
Of course there are. Which makes Hanson's next sentence - "Why don’t the study’s authors want us to hear about that?" - surprising. Overcoming Bias, indeed.
51.
by weichi 16y ago
Just ignore everything she said. Sure, but it's not something that everyone can just switch on. if thte OP were that kind of person, he probably wouldn't have posted. So I think this advice is poor for this case. You'll meet someone soon
52.
by weichi 16y ago
One classic bit of advice for getting over a breakup is to do something ... don't just sit around moping, find some activity to take on. A sport, taking a class (cooking, language, art, music, etc), volunteering, whatever. Ideally there w
53.
by weichi 16y ago
His Gamma function is even worse than I said above, because not only does it have a bug, it doesn't work at all for negative numbers , which was his big bolded complaint about the original implementation. I'm embarrassed that I didn't see
54.
by weichi 16y ago
It's true that the "bad java programmers" version doesn't work for negative numbers, but that's actually much better than his version of gamma, which doesn't work for ANY numbers, since it has a bug: Math.pow(z/Math.E, z) should be: Math.po
55.
by weichi 16y ago
Two things. 1. The 3.5 mile figure is for resolving the stripes on the flag, not for seeing the flag. If you just want to see the flag, an aperture diameter of around 400 m is required. 2. The "Dawes Limit" is just presented with no expla
56.
by weichi 16y ago
Naive question here (I've worked on web apps, but it was using Java technology of the circa 2000 vintage, so my knowledge is quite limited). It seems to me that it would be really nice for a developer to be able to treat html/javascript/css
57.
by weichi 16y ago
But we're talking about generating a salt here. As I understand it, the reason you use a salt is to make it much harder to brute-force a dictionary of passwords ahead of time. I don't see how the use of a cryptographically strong PRNG is go
58.
by weichi 16y ago
A comment and a question: 1. It should be fairly trivial to test that your implementation is giving exactly the same output as the c libs (once you have chosen a particular random number that feeds into the algorithm). It seems like the tri
59.
by weichi 16y ago
Could you be more specific?
60.
by weichi 16y ago
"If I could prove to you a fact that disagreed with the big bang, would you then abandon the theory" Sure I would! What are some of your facts?

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