wbhart

39 ms·

331.
by wbhart 12y ago
To both you and parent poster thanks for taking the time to write down your experiences. I used to completely dismiss people who had depression and anxiety, until I started having anxiety attacks myself. Now that I know how real they are, I
332.
by wbhart 12y ago
I've read that anxiety and depression often present together, so much so that it's hard to tell which is the primary issue. I personally suffer from anxiety without depression, so it seems easy for me to tell the difference. An an
333.
by wbhart 12y ago
I'm skeptical. Most of the plastics in his/her photos are visible. In the actual gyres, most plastics are microplastics, i.e. particles from cosmetics and clothes washing that have gone down the drain. There's a pinkie finger
334.
by wbhart 12y ago
I found that strength training really pushes your nervous system hard. The training worked ok, and I could lift 220kg at the end. But I also developed anxiety issues. Nowadays I do much higher repetitions at lower weight, pushing muscle end
335.
by wbhart 12y ago
When the treatment puts a large number of terminal patients into remission, there is no statistical reason for a placebo control. You know what percentage of such patients will die when offered a potentially revolutionary therapy that does
336.
by wbhart 13y ago
The strategy is to get the largest tile in a lower corner, with the next biggest tile next to it, and then the next, across the bottom. Once you have the bottom row filled, concentrate on putting tiles into the next row which will match the
337.
Substantial debris from Digital Globe satellite images(plus.google.com)
2 points by wbhart 13y ago|0 comments
338.
by wbhart 13y ago
The Big Bang theory is not about the "explosion" of our universe from a point. Firstly, the universe may have always been infinite in size. It's just that every small piece of that infinite universe has been expanding since a
339.
by wbhart 13y ago
It's kind of murky because in commutative algebra that is actually not the definition of a prime. It just so happens that the prime numbers are precisely the natural numbers with this property. It's fine to define prime numbers th
340.
by wbhart 13y ago
It is and it isn't. For example, you can adjoin sqrt(-1). This time there are finitely many units, but still unique factorisation. Instead adjoin sqrt(-17) and you get finitely many units but you also do not get unique factorisation.
341.
by wbhart 13y ago
For the ordinary natural numbers, 1 is the only number which you can invert, i.e. 1/2, 1/3, 1/4, etc. are not integers, but 1/1 is. If we take in all the integers, positive, negative and zero, then 1 and -1 are invertibl
342.
by wbhart 13y ago
That's so 2004. Nowadays we just increase the number of cores. Unfortunately the string theory landscape only has about 10^500 possible settings, and they are still unable to figure out how to have the cores use a shared state (so that
343.
by wbhart 13y ago
Obviously. However, the article talks not only about the cardinality of the set (which has been computed) but about enumerating the set using Hungarian Pengo. As the article already points out artfully that the attempting the latter may be
344.
by wbhart 13y ago
I'm assuming nothing of the sort. I said to compute "each one of" the partitions, which is a totally different problem to counting them.
345.
by wbhart 13y ago
It is estimated that in its existence the observable universe has performed no more than 10^120 operations on no more than 10^90 bits. Thus I believe the universe itself does not have the computational capacity to compute each one of the pa
346.
by wbhart 13y ago
"Content will be evaluated either individually or statistically." I am sure Google Translate is missing a "not" in that sentence!
347.
by wbhart 13y ago
I guess an electron is "an actual point".
348.
by wbhart 13y ago
Steve Wozniak seems to have been omitted from the credits in the slideshow that starts at about 20:40, and yet he appears in it at about 29:28. I wonder why he wasn't listed.
349.
by wbhart 13y ago
Most Google services except Gmail seem to be having issues at present. My experience was that I was corresponding with someone about a tech support query for an application they run on Google Compute Engine. Just as he asked me to hit some
350.
by wbhart 13y ago
Certainly he has only basecase division, which explains the original benchmark timings. I'm not very familiar with libtommath, though I had a passing experience with it back in about 2004-2005. However, looking through the code, he doe
351.
by wbhart 13y ago
There is a difference between the license under which a project is distributed and the license of individual contributions. Any GPL project can use BSD contributions. The overall license of the project remains GPL. The opposite is not true.
352.
by wbhart 13y ago
I don't understand the comment about forking. Sure, you can't take my files and change the license on them. But you can take any and all of my files as is, incorporate them into your own GPL project. That's effective the same
353.
by wbhart 13y ago
I should add that crypto is a whole 'nuther ballgame. You often need your algorithms to not leak information. That often means going to pretty insane lengths to ensure that. The standard in good crypto software is also so much more exa
354.
by wbhart 13y ago
I develop GPL software too. Quite a lot of it, actually. I'm not sure what you mean by "route around GPL". I chose BSD because it will maximise usability in certain BSD licensed programming languages. You can always fork the
355.
by wbhart 13y ago
Yes, but for crypto you only need to optimise for small "bignums". So performance is not satisfactory for larger stuff, at least not last time I looked. Which was a while ago.
356.
by wbhart 13y ago
Yes, I understand. I did a quick benchmark to get a ballpark figure for his 10 large integer multiplications, and using GMP's basecase code (which is much slower than the asymptotically faster algorithms it provides) I get about 2ms on
357.
by wbhart 13y ago
I took a look at that discussion. It looks to me like he might be comparing the mpz interface in GMP against a lower level interface. Of course GMP has the latter too, and it's likely much faster than the one he is writing. It sounds l
358.
by wbhart 13y ago
Nicely spotted. Though to be fair MPIR's assembly was improved using a superoptimiser and many more complex algorithms have assembly versions. It could take days for an inexperienced person to understand them. I hope to avoid that comp
359.
by wbhart 13y ago
I'd be interested to see a performance comparison. :-)
360.
by wbhart 13y ago
We already have 220,000 lines of (GPL) C code competing with NTL: http://flintlib.org/ :-)

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