longemen3000

6 ms·

1.
by longemen3000 5mo ago
Hello, The textbook seems nice and clear. The only nitpick i have is that it should talk more about equations of state. I understand that it may not be the focus of the text, but mentioning the current state of equations of state (SAFTs, cu
2.
by longemen3000 9mo ago
some constants that may or may not be transcendental: - Percolation Thresholds: https://en.wikipedia.org/wiki/Percolation_threshold - Critical scalings in 3d: https://en.wikipedia.org/wiki/Universa
3.
by longemen3000 9mo ago
That is one thing i like about the Julia package ecosystem. The general Registry (where package metadata is stored and where you go to register a new package), recommends using explicit names over short acronyms. For example, DifferentialEq
4.
by longemen3000 1y ago
It seems like this uses DWSIM under the hood for the simulations? Cool project
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by longemen3000 2y ago
_ is for Alphabet
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by longemen3000 2y ago
a 3-meter high wall of water is not really good either, due to kinetic energies, if no significant tsunami coastal protections, that water flow can reach far inland
7.
by longemen3000 3y ago
CORBA is used in the chemical industry (CAPE-OPEN standard) https://www.colan.org/
8.
by longemen3000 3y ago
i don't use Erlang (mainly Julia), but this change makes a lot of sense. in Julia, there is the == operator (value equality) and the === operator (value egality). 0.0 == -0.0,because they have the same "value". but they aren&
9.
by longemen3000 3y ago
i don't think so
10.
by longemen3000 3y ago
tianqi sold all his shares of SQM (one of Chile lithium companies, around 23%) after the announcement. The situation of the lithium in Chile is very particular. in the Pinochet dictatorship, litium was nationalized, because it was a key ing
11.
by longemen3000 3y ago
"Fun" fact about that, it was nationalized because it is a material for use in atomic bombs, in the 70 and 80 there wasn't another use for large scale lithium mining, except for that
12.
by longemen3000 3y ago
seems vaguely like McCornick relaxations? https://optimization.cbe.cornell.edu/index.php?title=McCormi...
13.
by longemen3000 3y ago
well, thermo is from the greek word thérmē meaning heat. we use the termo- suffix for all things that involve heat (thermodynamics -> termodinámica, thermometer -> termómetro)
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by longemen3000 4y ago
I suppose that Twitter has to pay each time a SMS is sent (ar at least, they pay according to the amount of SMS generated), so the bots pump that amount?
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by longemen3000 4y ago
grande messi!
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by longemen3000 4y ago
for instagram, i just gave up looking at the feed and just look at the posts that a group chat sends
17.
by longemen3000 4y ago
yeah, my systems are really small in comparison (1-20) but with higher order derivatives (up to 4th order), so reverse AD is not the best in that regard
18.
by longemen3000 4y ago
I feel called out on the academic part hahaah. I simply want to code state of the art (thermodynamic) models, and at least julia helps by providing easy testing and publishing infraestructure. but obviously we can't compete with a corp
19.
by longemen3000 4y ago
Of course! we are urgently in need of a "critical boiling" relation. At the moment we are using critical isochores as a way to "extend" the saturation curve, but it is less than ideal (at least they can be calculated qui
20.
by longemen3000 4y ago
We have a solver for the pure critical point, that just finds the (v,T) coordinate that satisfies dP/dV = 0 = d²P/dV². of course, not all EoS can even satisfy this condition. Cubics have the correct temperature and pressure (by de
21.
by longemen3000 4y ago
A lot of new work on supercritical fluids is the ability of calculate properties for those. normally we don't access to those conditions, so it is tricky to measure, but there is always new work on correlations capable of explaining th
22.
by longemen3000 4y ago
i'm working on calculating thermodynamic properties from equations of state [1], and yeah, looking for criteria on how to distinguish from a low pressure, a near critical pressure and a supercritical pressure is not trivial, specially
23.
by longemen3000 4y ago
The Julia equivalent does a good job explaining the 0.0 case: https://docs.julialang.org/en/v1/base/math/#Base.isapprox
24.
by longemen3000 4y ago
In Julia at least, there are packages that provide alternatives to Bigfloats: Logarithmic numbers: more range, less precision https://github.com/cjdoris/LogarithmicNumbers.jl Double arithmetic: stitch 2 floats togethe
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by longemen3000 5y ago
I like the discrepancy of technology presented in that counterexample. Euler definitely didn't Have that amount of computing power to just do a naive search,now we can even do those calculations on home computers
26.
by longemen3000 5y ago
i just want to know, do they really use the name "monkey puzzle tree" in english speaking countries? i was a little surprised to see that name, given that araucaria is the accepted name for the tree (in spanish). If we dig deeper
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by longemen3000 5y ago
just to point out, the Araucaria Araucana gives "piñón" (a type of pine nut, but not the same). they can be made into flour or be eaten after boiling.
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by longemen3000 5y ago
There is a very useful function in Julia, named Base.prompt (I don't remember if it's exported or not, but better be safe height_str=Base.prompt("Height above sea level(m): ") height =Parse(Float64, height_str)
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by longemen3000 5y ago
also: https://0.30000000000000004.com/
30.
by longemen3000 5y ago
yes, it is a common problem, it is acknowledged in the function's documentation: https://docs.julialang.org/en/v1/base/math/#Base.isapprox

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