jofer

15 ms·

61.
by jofer 2y ago
If you're near a port of entry, you actually can be stopped at any time to be asked for proof of citizenship/visa/etc. See also https://www.aclu.org/know-your-rights/border-zone There are plenty of bor
62.
by jofer 2y ago
In this case, it's not directly related. The inner core isn't what causes the Earth's magnetic field. It's convection within the liquid outer core that gives us a strong magnetic field. The inner core changing shape woul
63.
by jofer 2y ago
On a side note, https://www.science.org/content/article/scientists-probing-s... is a good pop sci article on the context.
64.
by jofer 2y ago
The article kind of glosses over a key point about how all of this works and why "rotation" vs "shape changing" are difficult to distinguish. That's all because of anisotropy of seismic velocity in the inner core.
65.
by jofer 2y ago
Just as an FYI: "leaflet" is the name of a popular web mapping JS library. https://leafletjs.com/ May or may not be relevant for you (and is definitely a very different field/product), but if you're rele
66.
by jofer 2y ago
I'd hesitate to call this a "cookbook". It's closer to a coffee-table photography book. It's somewhat more art than instruction, though it is both. It's inspiring, for sure, but is very different than most.
67.
by jofer 2y ago
It's pretty typical, actually. 50% is about the minimum that major universities take out of a grant you get as a researcher at the university. It's nominally to fund general facilities, etc. At least at public universities, it d
68.
by jofer 2y ago
See also: https://en.wikipedia.org/wiki/Australasian_strewnfield (debris over 10% to 30% of the Earth's surface from an impact ~788,000 years ago). Smaller, for sure, but very recent and large enough for "nuc
69.
by jofer 2y ago
Yeah, ammonia leaks are much more nasty than methane or hydrogen leaks. Methane, especially in LNG form, is quite safe compared to ammonia. LPG is even more stable than LNG and requires lower pressures. With that said, hydrogen leaks are &q
70.
by jofer 2y ago
Less advanced things have been labeled a national security risk. It's currently quasi-illegal in the US to open source tooling that can be used to rapidly label and train a CNN on satellite imagery. That's export controlled due t
71.
by jofer 2y ago
This x1000. It's not about the org, really. It's about what's being changed. Yes, a lot of large codebases have things that look wrong. They're not always wrong. Trying to clean up what look like cobwebs at the core of a
72.
by jofer 2y ago
Not all PhDs push boundaries of knowledge in quite that way. Often what you do was already known, but no one really figured out how to correctly apply it. Alternatively, it's often combining different things that were already well kn
73.
by jofer 2y ago
My wife rather derisively calls this the "penis pimple model of science". It's a great article and a great set figures, but folks sometimes push it a bit too much, especially in grad school. It has a lot of truth to it and it
74.
by jofer 2y ago
For folks asking what it does in general, see https://en.wikipedia.org/wiki/Image_registration This method is meant for working with multiple images where something has significantly changed in a non-linear way. E.g.
75.
by jofer 2y ago
It's usually the exact opposite for this sort of thing. You can't do this with natural language. Traditional computer vision is well suited to it and works with some tweaks. "Modern" techniques for it require collecting
76.
by jofer 2y ago
It's not that, it's breathlessly proclaiming that techniques that have been standards for decades are "groundbreaking AI". The hyperbole makes it impossible to get at anything, and if you accurately propose a time tested
77.
by jofer 2y ago
This is super useful, but it's a bit disappointing to see map digitization called "AI". I mean, sure, these are methods broadly in the computer vision realm and that gets referred to as "AI" sometimes. But at the e
78.
by jofer 2y ago
Klong is a different language than Python. Python using numpy would look broadly similar for the first few examples, yes. However, this is a way of executing a different language on numpy arrays. Array languages are a different paradigm.
79.
by jofer 2y ago
First off, major kudos and this is very very cool work. It's also a great article and really, everyone should go read it. Beyond "just" better string arrays, my favorite side effect of this is efficient NaN support in string
80.
by jofer 2y ago
Yes, but that's among the most expensive ways of approaching the problem. In regions where it's feasible, evaporation approaches are far cheaper, which is why they're still the most widely used approach. In humid regions wit
81.
by jofer 2y ago
Those are expensive and are avoided when possible. Brine ponds are cheap if you can use them. But with that said, yeah, evaporation ponds don't work especially well on the Gulf Coast.
82.
by jofer 2y ago
There are a lot of things in deep subsurface brine. It really varies. First and foremost, here are definitely lots of other salts. It is brine, after all. You produce a lot of halite (salt), gypsum, calcite, and all kinds of other evaporite
83.
by jofer 2y ago
You physically can't remove the overburden for this. The Smackover is at a depth of multiple kilometers in most of these areas. It's mining brine. I.e. the "mines" are basically deep water wells. The limestone itself do
84.
by jofer 2y ago
There wouldn't be any core for this. It would be a holdout of the brine samples used in training. The thing that would be being produced is brine, so lithium concentrations in brine samples are the validation dataset as well. In othe
85.
by jofer 2y ago
Put another way, this is pretty similar to the interpolation approaches that would normally be used for datasets like this in the world of mineral exploration. Kriging/co-kriging (i.e. gaussian processes) is the more commonly used appr
86.
by jofer 2y ago
I am very happy to see that the article _immediately_ explains how this is different from long-existing np.float128/np.longdouble. I was scratching my head for a bit there... It's also good to see that custom dtypes have come a lo
87.
by jofer 2y ago
Edit: Apparently that's the airborne equivalent of Tanager, not Tanager. (Same instrument design, but one is on a plane and one just launched into space not-too-long-ago.)
88.
by jofer 2y ago
That's around flaring, which is a bit different. Energy companies are very likely to buy the same data. Detecting methane leaks is a _good_ thing for them, both from an "avoiding fines" perspective and also from a "this
89.
by jofer 2y ago
Yeah, but it has to fit down a well. In other words, ideally it would be a maximum of 6 inches in diameter (and significantly less if it's going to be widely useful for solution-mined salt caverns). The "drilled shaft" is th
90.
by jofer 2y ago
Honestly, I'd recommend some of the NA beers that are being brewed these days over the hop sodas / hop waters. Hop water has no balance, and hops are all about being balanced out with something sweet/malty. NA beer has come

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