fastneutron

8 ms·

61.
by fastneutron 3y ago
Reality has a well known Bayesian bias… Joking aside, these slides are excellent! Is there an associated video or course that they were a part of?
62.
by fastneutron 3y ago
SEEKING WORK | Remote | US I am an experienced applied physicist with 10 years of experience in implementing the full hardware and software stack of emerging technologies. I am available for part-time consulting, including informal discussi
63.
by fastneutron 3y ago
I had to look up what “white hydrogen” actually was: https://en.wikipedia.org/wiki/Natural_hydrogen
64.
by fastneutron 3y ago
Are there any documented cases of people actually committing crimes with a 3D printed firearm?
65.
by fastneutron 3y ago
Care to elaborate? Are you envisioning some decoupling of energy and economic growth?
66.
by fastneutron 3y ago
At places I’ve worked, they were logged, but only ever audited in cases of suspected time fraud or other legal infractions. Anonymized statistics were also sometimes used for covid tracking. There was never somebody actively sifting through
67.
by fastneutron 3y ago
You might consider Shewchuk’s methods for robust geometric computations: https://www.cs.cmu.edu/~quake/robust.html There are more modern implementations available on GitHub, but I’ve found it to be fairly easy to integ
68.
by fastneutron 3y ago
It’s impossible to even get a sense of a textbook’s content from the so-called “previews” that you find on Amazon, Google Books, and the publisher’s’ websites. I prefer print, so I’ll happily pay if the content is good, but just letting me
69.
by fastneutron 3y ago
Reported on in a popular article here: https://interestingengineering.com/health/first-quantum-canc... This work purports to be the first kind of medical treatment whose mechanism makes direct use of an engineered quan
70.
Wireless electrical–molecular quantum signalling for cancer cell apoptosis(nature.com)
2 points by fastneutron 3y ago|1 comments
71.
by fastneutron 3y ago
CO2 removal and sequestration will be a net energy sink no matter what you do, since it amounts to “unburning” some portion of fossil fuel combustion that’s already been committed. The question is what methods are the least bad in terms of
72.
by fastneutron 3y ago
Element Six [1] makes all sorts of synthetic diamonds for industrial and analytical applications. Some are actually quite cheap, although there’s some irony perhaps in that they’re a DeBeers subsidiary. We use these diamonds in my lab for e
73.
by fastneutron 3y ago
Local and university chapters of the American Nuclear Society sometimes organize tours of nuclear power plants in their respective regions. I went on a few of these tours in college and it was truly a unique experience. It's easy to ta
74.
by fastneutron 3y ago
These two references are both really good, and freely available: Bayesian Optimization - https://bayesoptbook.com/ Surrogates - https://bobby.gramacy.com/surrogates/
75.
by fastneutron 3y ago
It depends on the needs of the specific application. What typically happens is that you’d use BO to globally converge to within some tolerance and use the resulting surrogate to get a map of where the interesting regions are. You can then m
76.
by fastneutron 3y ago
It wasn’t terribly difficult once we got a feel for the underlying API. GP surrogates work out of the box, but you can plug in other kinds as well. Same goes for acquisition functions. As far as the objective, usually we’re calling an exter
77.
by fastneutron 3y ago
If you’re not from a traditional engineering background, some of my terminology may have been confusing. Here’s a less jargon-heavy version: - We use Bayesian optimization to find the optimum (or worst-case) configuration of real manufactur
78.
by fastneutron 3y ago
We built (internally) an engineering optimization framework on top of Botorch. Bayesian optimization is a great tool to have in the toolbox for mapping a design space and finding the limiting cases with fewer calls to the expensive physics-
79.
by fastneutron 3y ago
If you’re in a developed nation, and unless you expect the earth to go through an irreversible Venus syndrome in the next century, I don’t see how this argument is anything more than a fig leaf for more fundamental social ailments. What wou
80.
by fastneutron 3y ago
On what basis do you make that statement? The hardware is literally manipulating coherent quantum states of trapped ions or transmon junctions in the cases of IonQ and IBM, respectively. Noisy and unreliable, sure, but most definitely not c
81.
by fastneutron 3y ago
This video, “Quantum Computing for Computer Scientists” is quite approachable: https://m.youtube.com/watch?v=F_Riqjdh2oM&pp=ygUeTWljcm9zb2Z...
82.
by fastneutron 3y ago
Shewchuk’s work on mesh generation is nothing short of a masterpiece. I will always direct people to the source of his Triangle code as an example of what good, literate C code should look like. His Berkeley page is here: https:/&#x2F
83.
by fastneutron 3y ago
The big "if" in quantum computing is in our ability to engineer error correction and fault tolerance. Implementing fault tolerance requires a physical qubit overhead of 10-10,000 qubits per logical qubit, depending on the technolo
84.
by fastneutron 3y ago
I work adjacent to this field, and I largely agree when it comes to the software side of things. With some notable exceptions, a lot of pure-play "quantum software" companies are premature optimizations to a field who's hard
85.
Project Prometheus – Nuclear Electric Spacecraft (2005)(osti.gov)
1 points by fastneutron 3y ago|0 comments
86.
by fastneutron 3y ago
> Once it reaches a safe orbit, the reactor will be turned on. Fission reactors aren't appreciably more radioactive than rocks you can dig out of the ground until you turn them on. This is something that wouldn't be brought onl
87.
by fastneutron 3y ago
Nitpick: You’re always going to get some parasitic D+D reactions because it’s reaction cross section is appreciably higher than D + 3He below 50 keV, and non-negligible even after the crossover point.
88.
by fastneutron 3y ago
Nuclear criticality safety was one of my favorite courses back during my nuclear engineering degree. The failure modes, like the article mentions, can be incredibly non-intuitive. Swirling vortices, firefighting foam, and even the mere pres
89.
by fastneutron 3y ago
As much as I agree with the sentiment, we have to admit it isn't always practical. There's only one LIGO, LHC or JWST, for example. Similarly, not every lab has the resources or know-how to host multi-TB datasets for the general p
90.
by fastneutron 3y ago
For a highly in-depth look at the theory behind this, I can recommend “The Universe in a Helium Droplet” by Volovik [1]. 1. https://academic.oup.com/book/11557

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