mturmon

82 ms·

871.
by mturmon 7y ago
The twitter thread gives a nice example of a failure of ergodicity that I was not aware of: "Now consider a gamble with multiplicative dynamics. Win 50% of your current wealth for heads, lose 40% of your current wealth for tails. Chang
872.
by mturmon 7y ago
>> "It’s all in our terms of service!” This smells to high heaven. As pointed out by OP, your TOS are written to gloss over who holds liability if a renter splits with your kit.
873.
by mturmon 7y ago
Like the optical brighteners that are used in detergents: https://en.m.wikipedia.org/wiki/Optical_brightener
874.
by mturmon 7y ago
Same issue here. I would never use “indigenously”, and the google links to the word are all to online dictionaries, not to actual usage examples.
875.
NOAA upgrades the U.S. global weather forecast model(noaa.gov)
2 points by mturmon 7y ago|1 comments
876.
by mturmon 7y ago
I agree with your medical analogy. Like I said, there’s a range of work at JPL, and some of the autonomy work by the linked group most definitely has run on Mars and in Earth orbit.
877.
by mturmon 7y ago
This is an over generalization. There’s a big range of agility at JPL depending on how close your work is to spacecraft operations. Here are two current job openings placed by good groups at JPL that many people here would find challenging
878.
by mturmon 7y ago
This is a good comment. The deployment is eye catching, but the cryocooler was the high technical risk item.
879.
by mturmon 7y ago
Argh! Correct network for CO2 validation is actually TCCON. Aeronet is a related set of in situ measurements, in some cases collocated with TCCON sites.
880.
by mturmon 7y ago
Thanks. One very important feature that simple in situ monitors don’t provide is total column CO2. That’s the average concentration from the ground up to the top of atmosphere. The satellites, and advanced ground measurements, get total c
881.
by mturmon 7y ago
One CO2 monitoring network that already exists and is mature is Aeronet, which has around 30 sites. The network is used to validate the CO2 satellite data we have now, including NASAs OCO-2. https://www.atmos-meas-tech.net/1
882.
by mturmon 7y ago
The satellite gives gas concentration in the atmosphere. It’s a second step, called “flux inversion,” to backtrack from the concentration to emission, or “flux” in the jargon. You need to have wind information (“advection”) to do this, of c
883.
by mturmon 7y ago
All the prior emissions will still be downwind and be readily detected. (Source: I supervise people doing this analysis).
884.
by mturmon 7y ago
This is wrong. Accelerating a return to the moon came from Trump. Please see: https://www.google.com/amp/nymag.com/intelligencer/amp/2019/... Some have speculated that the NASA (acting) Administrato
885.
by mturmon 7y ago
Bourne shells as early as Version 7 Unix (1979, [1]) had rather elaborate interpolation of variables into strings (i.e., not just ${foo} but ${foo?bar}, etc.). I'm reasonably sure that earlier versions of sh had some facility for thi
886.
by mturmon 7y ago
In C, the commas are also used in macro definitions where you need multiple statements to be output by the macro, but can’t use semicolons because the macro might expand in a context where only one statement is expected. In both the OP and
887.
by mturmon 7y ago
There is of course a huge difference between an "accountant" and a CPA. CPAs do have a code of ethics, but I'm not sure if it really has any teeth in practice. Care to comment?
888.
by mturmon 7y ago
This is a great little paper -- with comments and rejoinder! I presented it to a reading group back when it appeared, I enjoyed it so much. Always worth re-reading because Breiman is such a hero of useful probabilistic modeling and insigh
889.
by mturmon 7y ago
The methods and results are scary/foreboding. It's like they are automating and extending the methods used by, say, horror movie creators. Consider the horror-movie hockey mask, which also has the deep, dark eye sockets seen on
890.
by mturmon 7y ago
An extended quote from the book review I cited: Although [former NRC commissioner] Jaczko's account will become standard reading as an antinuclear book, his reasons have more to do with regulation than nuclear energy per se. Jaczko se
891.
by mturmon 7y ago
And in particular, Three Mile Island happened in 1979 and crystallized a lot of US opposition to nuclear power. One of the problems it exposed is a too-friendly connection between the NRC and the nuclear power industry. According to a rec
892.
by mturmon 8y ago
> ...I can’t think of a school with more regional status and less national status than USC... The state schools in the midwest are an example of this - say, Kansas State University. Another one: Catholic schools -- St. Louis University;
893.
by mturmon 8y ago
The LA Coliseum was built in the 1920s and expanded for the 1932 Olympics ( https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum#... ), and will no doubt be used for 2028.
894.
by mturmon 8y ago
This comment is, sadly, on-point. However, LAX is being redone, both terminal-by-terminal, and with a connector to transit and car rentals. One place to go for a summary is: https://www.lawa.org/en/connectinglax/l
895.
by mturmon 8y ago
Your personal website, btw, is really great, and that interviewer missed out. I program mostly Python in scientific contexts, but it's great to have your perspective on some larger questions of programming style and technology.
896.
by mturmon 8y ago
The same issue comes up on teaching probability, and even worse, elementary stochastic processes. To do it correctly, you need measure theory, but that requires a whole course or courses. In fact, a lot of the results of freshman calculus r
897.
by mturmon 8y ago
Come to think of it, STScI, which is where those developers worked (and maybe still do), was always a favorable environment for Python. Back in the early 2000s, before Numpy was a thing, STScI developed an image-file-reader for Python calle
898.
by mturmon 8y ago
Yes. A NN consisting of, for example, sigmoids will form an “algebra” that separates points in the sense of the Stone Weierstrass theorem, and the NN approximation result will follow. All that’s really needed is that the limit of the NN ba
899.
by mturmon 8y ago
Because of Lusin’s theorem, the much larger class of measurable functions is approximated by continuous functions across almost all of their domain. So continuity isn’t a major restriction here.
900.
by mturmon 8y ago
It's a dorky word, but it corresponds to an actual thing that is appreciated and noticed by technical employees. If used correctly, it has value.

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