Hacker NewsFile Systems Unfit as Distributed Storage Back Ends (2019)
https://dl.acm.org/doi/pdf/10.1145/3341301.3359656
#HackerNews #FileSystems #DistributedStorage #TechResearch #ACM2023 #StorageSolutions
simonbp@carlrichell @system76 Literally just heard two talks about about the Paris Observatory's efforts to digitize their ~10,000 plate archive to improve the orbits of potentially hazardous asteroids #acm2023
Prof. Sam LawlerWith that, my time at #ACM2023 is done (there's one more session but doesn't work with my schedule)
Hope you enjoyed reading my take on a lot of really amazing science that's happening!
D. Gomes: previous studies have looked at gravitational effects of Planet X and if it could be ruled out. Wow, in model includes 8 planets, Solar mass and J2, 343 asteroids + 2 secular rings, Pluto + 2 secular rings, Jupiter Trojans, and more.
Can rule out >5 Earth mass planet at <400AU with data from Juno, Cassini, and Mars orbiters.
Tested models with the OSSOS Survey Simulator (applies biases of survey to your model, then you can compare with real TNOs). Detached, distant resonant, and scattering populations all agree well! Estimates Sednoid population 250,000 D>100km, super hard to detect. Wait...he predicts clustering for a>120AU?? Interesting... I will have to send him an email...
Links to beautiful movies here: https://yukunhuang.com/download/videos/rogue-migration-sim-1-dda2023.mov
https://yukunhuang.com/download/videos/rogue-migration-sim-2-dda2023.mov
Dr. John Barentine FRAS@sundogplanets Your toots from #ACM2023 this week kind of make me wish I were a planetary scientist! 👏🏼
Y. Huang: did a survey: who believes there's a hidden planet in outer solar system - very few people raised their hand. He has bad news for Planet X fans, that planet was ejected billions of years ago.
Grainy migration, stellar flyby, existing planet all reproduce parts of Kuiper Belt, none reproduce all.
A ~earth mass planet that sticks around for a few 100Myr then gets ejected does a great job of populating resonances and detached populations.
Michele BannisterI'm just going to keep forlornly asking questions in the online question chat in the hope one of them actually gets through :D #acm2023 #roomwhereithappens
Ends by pointing out that Avi Loeb's poor science is actually contributing to the public's increasing lack of belief in science and increased belief in conspiracy theories :(
Estimates the impactor was beach ball sized- and probably *nothing* would survive to surface. Being generous, say that 1mg would land on surface. Uncertainties on landing at least ~10km radius, in middle of Pacific, as sink thru ocean will move by another ~10km
Yes, you can find micrometeorites by dredging w/ magnet. Will find at least 10,000x more regular old micrometeorites from previous impacts.