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xingyzt

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Show HN: LA Wildfire Satellite Analysis

github.com
117 points·by xingyzt·2 năm trước·60 comments

Snowflake Growth Simulation

pmerka.github.io
2 points·by xingyzt·2 năm trước·0 comments

A cheap barcode scanner helped fix CrowdStrike'd Windows PCs in a flash

theregister.com
66 points·by xingyzt·2 năm trước·17 comments

The two cultures of mathematics and biology (2014)

liorpachter.wordpress.com
61 points·by xingyzt·3 năm trước·31 comments

Ask HN: Examples of good technical UI designs

11 points·by xingyzt·3 năm trước·3 comments

The Pantheon of Derivatives (2017)

physicsforums.com
1 points·by xingyzt·3 năm trước·0 comments

The Fandomization of News

theverge.com
53 points·by xingyzt·3 năm trước·65 comments

UK MoD accidentally sends classified emails meant for US (.mil) to Mali (.ml)

theguardian.com
18 points·by xingyzt·3 năm trước·12 comments

Einstein's Philosophy of Science (2019)

plato.stanford.edu
104 points·by xingyzt·3 năm trước·14 comments

Show HN: How Stars Evolve

x-ing.space
2 points·by xingyzt·3 năm trước·0 comments

Recreating Apple’s “Magical” VR UI on a Quest Pro [video]

youtube.com
1 points·by xingyzt·3 năm trước·0 comments

Show HN: A Very Niche Formula Calculator

x-ing.space
2 points·by xingyzt·3 năm trước·0 comments

Jerk Systems and Chaotic Circuits

en.wikipedia.org
2 points·by xingyzt·3 năm trước·0 comments

comments

xingyzt
·2 năm trước·discuss
Maybe because FIRMS uses data from satellites in polar orbits, which only pass over the area once every few hours? With choosing near-Earth polar vs. farther geostationary orbits there's a tradeoff between space and time resolution.
xingyzt
·2 năm trước·discuss
No, just a student on winter break who got curious why CA Fire's map wasn't showing the up-to-date extent of the Eaton fire. Do they have this kind of heat data?
xingyzt
·2 năm trước·discuss
No, looks like they're doing a way better job! Thanks for sharing. I was only aware of the GOES sats. Seems like VIIRS is more intended to do this kind of monitoring.
xingyzt
·3 năm trước·discuss
It's accurate. Stellar winds are the primary driver of mass loss for stars near the end of their lives. Asymptotic red giants have extremely voluminous and sparse atmospheres very loosely bound by gravity; any excess radiation pressure would create an instability and blow away portions of the outer envelope. Eventually this exposes a dense, glowing carbon/oxygen/neon core surrounded by a fraction of the original atmosphere (exact composition varies), which we call a white dwarf.

Further reading: Ch. 13, Carroll & Ostlie, Introduction to Modern Astrophysics
xingyzt
·3 năm trước·discuss
I swear submitted this post last night but now it shows I did it two hours ago? Spooky
xingyzt
·3 năm trước·discuss
radius vs diameter
xingyzt
·3 năm trước·discuss
According to the description of this NASA image [1], they flew a 7-million-cubic-feet super-pressure balloon in 2009. Approximating as a perfect sphere, that's around 120 feet in radius / 80 yards in diameter. And "When development ends, NASA will have a 22 million-cubic-foot balloon", which is around 170 feet in radius / 110 yards in diameter. These things also look squashed when inflated [2], so they're probably even wider horizontally. Basically, you can fit an entire football field inside along with some stands.

1. https://commons.wikimedia.org/wiki/File:NASA-NSF_super_press...

2. https://commons.wikimedia.org/wiki/File:Super_v_zero_pressur...
xingyzt
·3 năm trước·discuss
AI couldn't have started any of the artistic and literary movements, which don't just blend between traditional styles but reject some aspect to forge something new. You can't get AI to generate cubism from training on Victorian art.
xingyzt
·6 năm trước·discuss
They don't do ads per se, but do spend quite a lot in other forms of marketing -- Discounts & perks for referrals, high-quality press photos, events, livestreams, etc.