nthompson

6 ms·

1.
by nthompson 7y ago
Automatic differentiation only works on functions which are locally complex analytic. It fails on things that fall outside that model, but are still differentiable. Daubechies wavelets are a good example of this.
2.
by nthompson 7y ago
> When I took a tour of the Oak Ridge Leadership Computing Facility a few years ago, Buddy Bland, who is Project Director, told me he could tell when he comes to the Lab in the morning if they are running the LINPACK benchmark by looking
3.
by nthompson 7y ago
They do not have their own power station. They have the Bull Run coal plant and hydro plants in the area. They do coordinate with TVA before a run.
4.
by nthompson 7y ago
Pulsed femtosecond lasers have repeat rates in the megahertz. The total energy is very high. When I took laser physics in grad school, they were able to drop a razor blade through the beam and slice it in half. That was in 2013. So yeah, pu
5.
by nthompson 7y ago
The product lineup is solid; even if they go bankrupt, the debt owners will simply wipe out the shareholders, prune away the less profitable parts of the business, and scale back the expensive R&D ambitions. The Model 3 will still be pr
6.
by nthompson 7y ago
Yeah, but medical bill collections has way less weight on your credit than (say) a car bill past due. They send so many people to collections that even creditors don't care about it anymore.
7.
by nthompson 7y ago
Do you work in medical billing? My experience is just the opposite, they try to extract marginal costs from those people.
8.
by nthompson 7y ago
Buddy of mine breaks his collarbone, gets some pins put in. They drop him a bill for $25k. He says "I'll give you $1500 now, or you can send me to collections." They took it; now I use this technique all the time. They make u
9.
by nthompson 7y ago
He's making a joke that the arbitrage could generate infinite amounts of money by generating clean power with coal power.
10.
by nthompson 7y ago
haha they ought to try that.
11.
by nthompson 7y ago
The Idaho legislature is totally dominated by farmers (I mean this literally: The Idaho congressmen are primarily farmers.). These farmers are allowed way better deals on hooking up solar and providing it to the grid than city consumers.
12.
by nthompson 7y ago
Location: Knoxville, Tennessee Remote: Yes Willing to relocate: No Technologies: C++/HPC/Python/JS/Numerical Analysis/Signal Processing Email: nathompson7@protonmail.com I have written multiple scientific desktop ap
13.
by nthompson 8y ago
Can you selectively grow semiconducting tubes, or metallic tubes, or do you only get a mixture of semiconducting and metallic?
14.
by nthompson 8y ago
That sounds tough. You also have a code size/speed trade off that must be managed. Where did yours land?
15.
by nthompson 8y ago
Awesome list of questions, btw.
16.
by nthompson 8y ago
The question about Gracie jiu-jitsu is not so interesting anymore: In the early 90’s, there were simply very talented jiu jitsu practitioners who were close to the UFC. Now we’ve witnessed many strategies used successfully in MMA, like Amer
17.
by nthompson 8y ago
Very cool analysis. I would add: A lot of regex work is still being done out of boost.regex; maybe people still haven't done the switch for most projects? For example, I think boost.regex is still used in Chrome. Just ran your code on
18.
by nthompson 8y ago
Are you sure it was three miles? Serious wildfires make your eyes burn 50 miles away.
19.
by nthompson 8y ago
I imagine both steeper and flatter. The flatter curve seems to be easier to handle within my naive mental model of how utilities work.
20.
by nthompson 8y ago
Isn't this problem caused by fix axis solar? If all solar panels were on trackers, wouldn't the curve change form and partially mitigate the problem?
21.
by nthompson 8y ago
I should've clarified: I meant portability of code so that is can be compiled by multiple compilers, VS, clang, gcc. The feature set for C++ is so vast that it's almost certain that you'll write code on for one compiler that
22.
by nthompson 8y ago
At APS March Meeting in LA, there were groups fabricating Josephson junctions. They appeared to be succeeding at ~15mK and individual logic gates, not ICs. I got the impression that their field was advancing steadily, but there was no excit
23.
by nthompson 8y ago
I learned x86 floating point assembly from Ray Seyfarth's book: https://www.amazon.com/Introduction-Bit-Assembly-Programming... I figured out how to write some basic stuff, then I learned to use perf to performance tun
24.
by nthompson 9y ago
Look at the git makefile: https://github.com/git/git/blob/master/Makefile You know what you have to do to build git? Type make. It's amazing.
25.
by nthompson 9y ago
A-B testing of article titles should be regarded as a breach of journalist ethics.
26.
by nthompson 9y ago
Really cool tool thanks! One problem to maybe take care of next iteration: $ top -o cpu LuluDaemon 29.5%
27.
Numerical Integration Over Brillouin Zones(bandgap.io)
3 points by nthompson 9y ago|0 comments
28.
by nthompson 9y ago
Yeah, I have dreams of using crystal field splitting to help design semiconductor lasers in bandgap.io, which would be a nice applied group theory problem. Its about 3 years out on my roadmap!
29.
Understanding Irreducible Brillouin Zones and Band Structures, Fer Real(bandgap.io)
8 points by nthompson 9y ago|3 comments
30.
Bloch's Theorem via Representation Theory(bandgap.io)
9 points by nthompson 9y ago|5 comments

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