mturmon

5 ms·

1.
by mturmon 18d ago
This is true. The telescope is much more than just the primary mirror. Roman has two science instruments, a wide-field imager (“WFI”) and a coronagraph (“CGI”) and they were both built by NASA for this purpose (optics, electronics, detector
2.
by mturmon 1mo ago
The above is a useful idiom that has a somewhat different feel than using !$, etc. Construction versus surgery.
3.
by mturmon 1mo ago
Instead of alt-^, I set “magic-space” in `.inputrc`. This will expand the event designator after you type space to end it. So you type “!” “$” “space” and the designated argument expands in-place.
4.
by mturmon 1mo ago
See: https://smg.quora.com/Are-there-any-functions-whose-Fourier-... Look under the section “Surprise”. This gives a construction that produces a new function g, whose transform is itself, that is a simple modification of a
5.
by mturmon 1mo ago
This is mistaking two kinds of power laws. OP is considering power laws in the frequency domain. You are considering power laws in the heavy tail of a distribution. Different things! But there are confounders that make discussion seem simil
6.
by mturmon 1mo ago
Yes. My PhD advisor had a research interest in axiom systems for probability that are weaker than the familiar Kolmogorov axioms, which are sometimes abbreviated "CMP" for "conventional mathematical probability". I'
7.
by mturmon 1mo ago
Not “me,” but yes, that’s the rate quoted in the document I linked about the instrument that captured the images in OP.
8.
by mturmon 1mo ago
The piece ends with the observation that maybe the fact that 1/f noise is its own Fourier transform is a clue. Turns out this property is not unusual. There are many such pairs - there’s a reasonably well-known journal paper with a con
9.
by mturmon 1mo ago
Yes, just 0.5nm of spectrum in the instrument used ( https://dkist.virtualsolar.org/vanNoortfastcam/ , see under “DataSetDescriptions.pdf”). If the pixels really are 20x20km, located at 1AU, I get 500k photons (within th
10.
by mturmon 1mo ago
People were identifying gross features (like the convection cells in the first website I linked), and giving those features names. Like “sunspots”, “faculae”, “pores”, “granulation”, “bright points”, etc. That’s on the observational side. I
11.
by mturmon 1mo ago
Sure thing. Remote sensing of the Sun is different from anything else, because you have so many photons. The idea of binning it down so fine (20x20km, 740Hz, a single nm of spectrum around a band center) is unheard of for any other target.
12.
by mturmon 1mo ago
This kind of observation is a big deal for solar physics. It's been believed for decades that these small-scale (~100km and below) turbulent features are critical to understanding how energy dissipates in the Sun. And thus, how sunspot
13.
by mturmon 2mo ago
On the other hand: Vidiots: https://vidiotsfoundation.org/history-mission/ Video Journeys: https://conorholt.medium.com/video-store-interview-video-jou... (Keanu Reeves, Laurence Fishburne) Video Activ
14.
by mturmon 4mo ago
Matlab license server goes down, for example
15.
by mturmon 4mo ago
I also enjoy this classic meme. The full version is here: https://www.dourish.com/goodies/see-figure-1.html Some phrases have stuck with me, like “mandatory defaults“, “they told their users to see figure 1 a long time
16.
by mturmon 5mo ago
Like the article hints at, some of the particular strengths of this new measurement: - frequent revisit, so can track even sub-monthly changes - the L-band radar is at a wavelength (24cm) that penetrates vegetation canopy, removing a confou
17.
by mturmon 5mo ago
Just as a fun fact, here are some images of the extent of subsidence (due to groundwater pumping for agriculture) in the California Central Valley: https://www.usgs.gov/centers/land-subsidence-in-california/m... N
18.
by mturmon 5mo ago
I believe you are correct. The person who delivered this threat is a grandson of William Colby (ex-CIA director, ex-OSS, arch-Catholic). Elbridge Colby is also Catholic, and some of his religious beliefs factor into his policy preferences.
19.
by mturmon 7mo ago
Can’t tell if missing /s, but the analogy is: Jewish/socialist physicists:atomic weapons::”foreign“ AI scientists:automated targeting I’m not looking forward to the loss of innocence of computer science that is parallel to that of
20.
The First Day of the Cenozoic(pnas.org)
3 points by mturmon 7mo ago|0 comments
21.
by mturmon 8mo ago
Replying very late, but with an actual answer. It turns out that yes, better forecasts is a large part of what motivated the launch of this instrument. High-spectral-resolution IR spectra at GEO allow estimation of vertically-resolved tempe
22.
by mturmon 8mo ago
They also feature that the IR hyperspectral measurement is new -- 1700 channels in IR for a telescope in GEO seems new to me, but I'm not sure what exists now in this space. They say they hope to retrieve trace gases at that global sca
23.
by mturmon 8mo ago
Getting close to the "why Dropbox when you can rsync" mistake ( https://news.ycombinator.com/item?id=9224 ) @vicapow replied to keep the Dropbox parallel alive
24.
by mturmon 8mo ago
I meant this more as a rueful acknowledgment of an academic truism - not all citations are read by those citing. But I have touched a nerve, so let me explain at least part of the nuance I see here. In mathematics/applied math consider
25.
by mturmon 8mo ago
Totally! If you haven't burrowed in the stacks as a grad student, you missed out. The real challenges there aren't the "biggies" above, though, it's the ones in obscure journals you have to get copies of by inter-li
26.
by mturmon 8mo ago
I was an area chair on the NeurIPS program committee in 1997. I just looked and it seems that we had 1280 submissions. At that time, we were ultimately capped by the book size that MIT Press was willing to put out - 150 8-page articles. Ba
27.
by mturmon 8mo ago
My son went to LA-area and LAUSD schools, and the echo of that same commitment from those years in California was still faintly detectable in the 2010s, highly attenuated by Prop 13, as you mention.
28.
by mturmon 8mo ago
On the other hand, right when you think you have her pegged as contemptuous, or boring, this beautiful essay on accidental wonders and catastrophes: https://loa-shared.s3.amazonaws.com/static/pdf/Didion_Malibu...
29.
by mturmon 8mo ago
Katherine Carpenter Elementary, OP, KS for me, in the same era -- just a couple miles from your school. I share some of the same disappointment, especially going back and noticing disinvestment in the schools, which were one of the gems of
30.
by mturmon 8mo ago
Here's a nice animation tracking this (covers up to 2022, not sure about 2025): https://grace.jpl.nasa.gov/resources/42/grace-and-grace-fo-t... The southern end of the central valley (San Joaquin region, whol

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