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Qem

6,611 karma · joined June 17, 2020

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Qem··on Earth was born dry until a cosmic collision made it a blue planet
Maybe they didn't produce an intelligent species just because they had not the luck of living in the unprecended time in the history of Earth with both high atmospheric O2 and very low atmospheric CO2 we enjoyed for a while, before we started to burn fossil fuels by the gigaton. See https://www.qeios.com/read/IKNUZU
Qem··on How Israeli actions caused famine in Gaza, visualized
> Not to mention destroying all the farmland in Gaza too.

There's a report by forensic-architecture on that: https://forensic-architecture.org/investigation/ecocide-in-g...

Qem··on The history of cataract surgery
Is there some way to prevent cataracts, or is that just another unavoidable fact of ageing, like graying hair.
Qem··on Why Is Python So Popular in 2025?
At least with BigInts, CPython implementation is quite fast. See https://www.wilfred.me.uk/blog/2014/10/20/the-fastest-bigint...
Qem··on China Is Leaving America in the Dust on Clean Energy
China is just overtaking. Who is actually dragging America behind like a anchor is Big Oil, sabotaging clean energy efforts.
Qem··on I only use Google Sheets
> Any flaws with Excel haven't been due to the actual program or data, but just how the files are managed within projects.

Not sure of that. Examples:

https://www.sciencedirect.com/science/article/abs/pii/S01679...

https://link.springer.com/article/10.1186/1471-2105-5-80

Qem··on U.S. Army confirms Tesla Cybertruck can't be imported in Europe
Wait until you discover if they run people over abroad diplomatic immunity can be claimed: https://en.m.wikipedia.org/wiki/Death_of_Harry_Dunn
Qem··on Google's Android developer registration requirement will kill F-Droid
I really wish FirefoxOS had suceeded.
Qem··on Meta-analysis of 2.2M people: Loneliness increases mortality risk by 32%
In US. But there are places with proper socialized health systems, where one must not be afraid of bankruptcy by calling an ambulance.
Qem··on Meta-analysis of 2.2M people: Loneliness increases mortality risk by 32%
I bet any change in mortality due to increased isolation is offset by decreased deaths due to traffic acidents.
Qem··on Role of CO2 in the Evolution of Intelligence: Solving the Dinosauroid Question
> Hence, it is possible to propose that large brains can be developed by natural selection only for atmospheric compositions that allow a high tissue oxygenation, that is high O2/CO2 ratios or, equivalently, low CO2 concentrations when the O2 level remains approximately constant.

It appears we have a new big filter candidate, fortunately behind us. If atmospheres with molecular oxygen are rare, those rich in oxygen while very low on CO2 must be much rarer yet...

> Afterward, the Earth system will resume the long-term trend of decline in CO2 concentrations resulting from the response of the biosphere to the slow increase of the solar irradiation, about 10% every billion years. Some recent results by Ozaki and Reinhard confirm these early results and show that, while oxygen is expected to remain at the current concentrations for the long term future, carbon dioxide is expected to continue its gradual decline, reaching values of the order of 10 ppm in ca. one billion years.

...except when the biosphere is almost out of the inner bound of the habitability zone and you're doomed anyway.

Qem··on Tracing JITs in the Real World CPython Core Dev Sprint
> Knowledge transfer worked in both ways: I learned a lot about the internal details of CPython's JIT, and conversely I shared with them some of the experience, pain points and gut feelings which I got by working many years on PyPy.

Can cross fertilization between PyPy and CPython JIT efforts help already fast PyPy to get even faster? Like, did CPython JIT team try something PyPy developers didn't attempt before?

PyPy is awesome, btw.

Qem··on Cuba hit with fifth blackout in less than a year with 10M people in the dark
https://en.m.wikipedia.org/wiki/Sicko
Qem··on Germicidal UV could make airborne diseases as rare as those carried by water
> I think the microbes are still trying to figure this one out.

They mostly figured it out a couple billion years ago. Cyanobacteria oxidized Earth's surface until the atmosphere was flooded with molecular oxigen, that gets turned to ozone in the stratosphere, filtering most UV. Pretty large engineering feat for a bunch of microbes.

Qem··on Cuba hit with fifth blackout in less than a year with 10M people in the dark
> I was horrified by what I saw; just how broken the infrastructure was, how poor and destitute the people were.

Yet they manage to have better healthcare overall.

Qem··on Statistical Physics with R: Ising Model with Monte Carlo
I wonder how close R was to also take over the scientific computing/machine learning space, instead of Python's numpy/scipy ecosystem.
Qem··on Top UN legal investigators conclude Israel is guilty of genocide in Gaza
> how did they manage to average less than one dead per bomb dropped in urban/suburban environments?

By targeting first responders, jornalists, paramedics, and any professionals able to properly rescue wounded, dead and count the causalties, making available numbers a gross underestimate on the true death toll. Just a few days ago we all watched a staircase full of working first responders and jornalists being blown by israeli tank fire.

Qem··on Top UN legal investigators conclude Israel is guilty of genocide in Gaza
Did Apartheid South Africa becoming unviable condemned white south africans to death?
Qem··on Top UN legal investigators conclude Israel is guilty of genocide in Gaza
The moral position is to do what South Africa did, end apartheid.
Qem··on Top UN legal investigators conclude Israel is guilty of genocide in Gaza
A tech-enabled one.
Qem··on Top UN legal investigators conclude Israel is guilty of genocide in Gaza
> The attack on Gaza’s largest fertility clinic destroyed thousands of embryos, sperm samples, and eggs.

More info on that particular attack: https://www.bbc.com/news/articles/c15npnzpd08o

Qem··on Many hard LeetCode problems are easy constraint problems
What are some good books to get started on the subject?
Qem··on QGIS is a free, open-source, cross platform geographical information system
What R modules do you use for that?
Qem··on Minerals represent potential biosignatures in the search for life on Mars
I have no idea.
Qem··on QGIS is a free, open-source, cross platform geographical information system
I think it did to GIS what Sagemath did to free/open source mathematical software. It integrated everything in a nice package, freeing the users from the burden of dealing with countless disparate packages.
Qem··on QGIS is a free, open-source, cross platform geographical information system
Probably closer to the first situation. It curb stomped ArcGIS in the geographic information system community. When I started working with GIS at work, expensive ESRI products were default in this market, a la matlab in another field. Most coleages of mine had not heard about QGIS. Now QGIS is ubiquitous. It did to ArcGIS and its countless paid add on modules what scipy/numpy did to matlab.
Qem··on Minerals represent potential biosignatures in the search for life on Mars
This. Not all ejecta from asteroid/comet impact is vaporized. Some is launched at escape velocity mostly undisturbed[1]. Mars both cooled first, giving it a leg up to allow biogenesis[2], and has lower escape velocity, making easier for rock chunks to be launched from there to Earth, rather than the reverse. From thousands of impacts and billions of rock chunks ejected from Mars in the early solar system, the successful delivery of a single viable microbe would be enough to seed Earth.

[1] https://fire.biol.wwu.edu/cmoyer/zztemp_fire/biol345_F10/pap...

[2] https://arxiv.org/pdf/astro-ph/0403049

Qem··on Minerals represent potential biosignatures in the search for life on Mars
Likely, when Mars went bad, their planet B was Earth. Nowadays they call themselves Earthlings (AKA us).
Qem··on Minerals represent potential biosignatures in the search for life on Mars
Related comics: https://www.badspacecomics.com/post/apostles-of-mercy

If we eventually find martian microbes, or at least their fossils, my bet is that we'll find them to be related to us.

Qem··on Minerals represent potential biosignatures in the search for life on Mars
If the origin is not independent, that doesn't necessarily change the position of the filter.
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