Today, we are bringing other exciting results involving black holes and AI. We released a new paper:

"Black Hole Weather Forecasting with Deep Learning: A Pilot Study"

Work by Roberta Duarte (@import_robs), Rodrigo Nemmen (@nemmen) and João Paulo Navarro (from @NVIDIABrasil).

The authors used deep learning to simulate the dynamics of gas accreting onto a black hole, i.e., black hole weather forecasting.

They trained the model (U-Net) with frames from numerical solutions of the hydrodynamical equations.
Numerical simulations are time-consuming. A simple simulation can take as long as 7 days to finish. If we go with more complex simulations, this time may increase.

We want to investigate if deep learning can be a new method to simulate accurately in less time!
In the paper, they discussed two examples:

1- The model simulating only one system after learning only from this system
2- The model simulating an unseen system after training with several systems with different initial conditions
In the first example, they trained the model with a single system and analyzed how the model simulates by iterative predictions.

The result is that the model can simulate up to 8e4 gravitational time accurately with a speed-up of 30000x faster!
In the 2nd example, they fed the model seven different simulations with the same physics but other initial conditions. They informed the model how the initial conditions differ from one to another.

However, they hid one system to understand the generalization power of the model!
They analyzed how the model can simulate an unseen system only by looking at previous systems!

It simulated the unseen system for 4e4 gravitational time, showing that the model can generalize the black hole physics presented in the dataset!
In the second example, the model can also simulate the systems it learned from:
For more details, please check it out on arXiv: https://t.co/VBh3RQnhov

More from Science

"The new answer to a 77-year-old problem"

😭


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JUST ONE PERSON—UK 🇬🇧 scientists think one immunocompromised person who cleared virus slowly & only partially wiped out an infection, leaving behind genetically-hardier viruses that rebound & learn how to survive better. That’s likely how #B117 started. 🧵 https://t.co/bMMjM8Hiuz


2) The leading hypothesis is that the new variant evolved within just one person, chronically infected with the virus for so long it was able to evolve into a new, more infectious form.

same thing happened in Boston in another immunocompromised person that was sick for 155 days.

3) What happened in Boston with one 45 year old man who was highly infectious for 155 days straight before he died... is exactly what scientists think happened in Kent, England that gave rise to #B117.


4) Doctors were shocked to find virus has evolved many different forms inside of this one immunocompromised man. 20 new mutations in one virus, akin to the #B117. This is possibly how #B1351 in South Africa 🇿🇦 and #P1 in Brazil 🇧🇷 also evolved.


5) “On its own, the appearance of a new variant in genomic databases doesn’t tell us much. “That’s just one genome amongst thousands every week. It wouldn’t necessarily stick out,” says Oliver Pybus, a professor of evolution and infectious disease at Oxford.
Epic thread incoming:

I'm going to answer the question so many people have been asking this week:

WHAT IS PROJECT X???

Here's the definitive thread to tell you - and show you -precisely what Project X is

Grab a drink, sit down with me and let's #TalkLiberation

<3

1/?

"Project X" is actually called "PanQuake".

Pan means "all". Quake is the huge effect our voices can have when our communications are uncensored and when we have access to brand new functionality that *enhances* our social reach, rather than diminishes it

Here's our logo:

2/?


You can follow the fledgling official PanQuake Twitter account here: @pan_quake and see our super cool new website here:
https://t.co/F7wLSeM6aK

You can find our donation page here: https://t.co/VICFnsR0RX

Keep reading this thread to find out why we created it & what it is

3/?

SPOILER ALERT: Much of the content below this point is from my personal slides & speech notes from today's launch event. That stream got totally ruined by (big) tech problems, but I'm happy to report everything is turning out wonderfully


Here are some of our most high profile & dedicated public advocates for PanQuake - many of whom were scheduled to appear at our launch. All of whom stuck around for hours, to do a prerecord of the event, which is being edited, processed & uploaded for you as I write this.

5/?

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