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xingyzt

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Show HN: LA Wildfire Satellite Analysis

github.com
117 points·by xingyzt·2년 전·60 comments

Snowflake Growth Simulation

pmerka.github.io
2 points·by xingyzt·2년 전·0 comments

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

theregister.com
66 points·by xingyzt·2년 전·17 comments

The two cultures of mathematics and biology (2014)

liorpachter.wordpress.com
61 points·by xingyzt·3년 전·31 comments

Ask HN: Examples of good technical UI designs

11 points·by xingyzt·3년 전·3 comments

The Pantheon of Derivatives (2017)

physicsforums.com
1 points·by xingyzt·3년 전·0 comments

The Fandomization of News

theverge.com
53 points·by xingyzt·3년 전·65 comments

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

theguardian.com
18 points·by xingyzt·3년 전·12 comments

Einstein's Philosophy of Science (2019)

plato.stanford.edu
104 points·by xingyzt·3년 전·14 comments

Show HN: How Stars Evolve

x-ing.space
2 points·by xingyzt·3년 전·0 comments

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

youtube.com
1 points·by xingyzt·3년 전·0 comments

Show HN: A Very Niche Formula Calculator

x-ing.space
2 points·by xingyzt·3년 전·0 comments

Jerk Systems and Chaotic Circuits

en.wikipedia.org
2 points·by xingyzt·3년 전·0 comments

comments

xingyzt
·2년 전·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
·2년 전·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
·2년 전·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
·3년 전·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
·3년 전·discuss
I swear submitted this post last night but now it shows I did it two hours ago? Spooky
xingyzt
·3년 전·discuss
radius vs diameter
xingyzt
·3년 전·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
·3년 전·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
·6년 전·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.