@a-lebedev.bsky.social
Physicist, Mathematician and software engineer. Focus on relativity, topology, electrodynamics, stochastic methods and above all: reproducibility. Stuck in a stupid management role.
This shows how little effort (comparatively) goes into "influencing" on Twitter. They do not even bother obfuscating the location by using a VPN!
I’m still enjoying how MAGA Twitter will never live down that they’re all troll farms from Russia and Bangladesh. The whole MAGA ‘movement’ has been fake bullshit from top to bottom from the very beginning.
Musk Accidentally Proves Most MAGA Accounts On Twitter Live In Russia
Whoops!
www.thegodpodcast.com
November 25, 2025 at 10:16 AM
This shows how little effort (comparatively) goes into "influencing" on Twitter. They do not even bother obfuscating the location by using a VPN!
Which makes it all the more frustrating that applying for funds for fundamental research is always a massive uphill battle - especially for small groups.😒
Every machine in a Hospital that diagnoses your body without cutting you open is based on a principle of Physics, discovered by a Physicist who had no interest in Medicine.
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
November 25, 2025 at 10:13 AM
Which makes it all the more frustrating that applying for funds for fundamental research is always a massive uphill battle - especially for small groups.😒
As always: It's complicated.
LLMs will almost surely not help.
Focused use of the methods for modelling and prediction in complex systems (e.g. LSTMs for the power grid) may turn to be a very useful tool.
Both are subsumed under "AI", but have generally vastly different levels of care applied.
LLMs will almost surely not help.
Focused use of the methods for modelling and prediction in complex systems (e.g. LSTMs for the power grid) may turn to be a very useful tool.
Both are subsumed under "AI", but have generally vastly different levels of care applied.
There is a big push at Cop30 to reframe AI as a way to cut, rather than add to, planet-heating emissions.
But is 'AI for good' really a force that will help confront the climate crisis? www.theguardian.com/environment/...
But is 'AI for good' really a force that will help confront the climate crisis? www.theguardian.com/environment/...
AI is guzzling energy for slop content – could it be reimagined to help the climate?
Some experts think AI could be used to lower, rather than raise, planet-heating emissions – others aren’t so convinced
www.theguardian.com
November 18, 2025 at 11:29 AM
As always: It's complicated.
LLMs will almost surely not help.
Focused use of the methods for modelling and prediction in complex systems (e.g. LSTMs for the power grid) may turn to be a very useful tool.
Both are subsumed under "AI", but have generally vastly different levels of care applied.
LLMs will almost surely not help.
Focused use of the methods for modelling and prediction in complex systems (e.g. LSTMs for the power grid) may turn to be a very useful tool.
Both are subsumed under "AI", but have generally vastly different levels of care applied.
Reposted
A little less than a year ago, a large team of cosmologists reported evidence that dark energy (which drives the acceleration of the expansion of the Universe) evolves over time. This made a huge splash but has also been viewed with healthy skepticism. Today they report that evidence has weakened. 🧪
The Dark Energy Survey Supernova Program: A Reanalysis Of Cosmology Results And Evidence For Evolving Dark Energy With An Updated Type Ia Supernova Calibration
We present improved cosmological constraints from a re-analysis of the Dark Energy Survey (DES) 5-year sample of Type Ia supernovae (DES-SN5YR). This re-analysis includes an improved photometric cross...
arxiv.org
November 12, 2025 at 12:00 PM
A little less than a year ago, a large team of cosmologists reported evidence that dark energy (which drives the acceleration of the expansion of the Universe) evolves over time. This made a huge splash but has also been viewed with healthy skepticism. Today they report that evidence has weakened. 🧪
Subject of a talk at the Chaos Communication Congress in 2023
media.ccc.de/v/37c3-12142...
media.ccc.de/v/37c3-12142...
November 8, 2025 at 1:26 AM
Subject of a talk at the Chaos Communication Congress in 2023
media.ccc.de/v/37c3-12142...
media.ccc.de/v/37c3-12142...
This reminds me of something…something 9 decades in the past.
More than the violence, the lack of due process, and the randomness of targets, I'd say the most evil part of the ICE arrests is that they don't notify family members. A victim could have died and no one would know what happened.
November 8, 2025 at 1:23 AM
This reminds me of something…something 9 decades in the past.
There is no cloud, only other people's computers.
Microsoft's data sovereignty: Now with extra sovereignty!
Microsoft's data sovereignty: Now with extra sovereignty!
: Under shadow of US CLOUD Act, Redmond releases raft of services to calm customers in the EU
www.theregister.com
November 7, 2025 at 12:57 PM
There is no cloud, only other people's computers.
That, unfortunately, is not a fix for the industry where gas is a source product to be converted into others (e.g. plastics, if I recall correctly).
It could reduce the cost via the market, but that's been historically unreliable.
It could reduce the cost via the market, but that's been historically unreliable.
Europe’s gas prices are still far above the U.S.
Sept 2025: $11.1 vs $3.0 per MMBtu — nearly 4× higher.
Even before the crisis, Europe paid more.
The only lasting fix? Less gas, more renewable energy, more efficiency and more clean electrification. ⚡️
Sept 2025: $11.1 vs $3.0 per MMBtu — nearly 4× higher.
Even before the crisis, Europe paid more.
The only lasting fix? Less gas, more renewable energy, more efficiency and more clean electrification. ⚡️
November 3, 2025 at 10:09 AM
That, unfortunately, is not a fix for the industry where gas is a source product to be converted into others (e.g. plastics, if I recall correctly).
It could reduce the cost via the market, but that's been historically unreliable.
It could reduce the cost via the market, but that's been historically unreliable.
Surprisingly #Galena was a source of silver in #Freiberg but for me neither that, nor its fancy cubic deposits save it from being #Lead.
So my vote will go to #Copper - that in its ubiquity and great conducting properties (head & current) is the giant carrying all of modern society!
So my vote will go to #Copper - that in its ubiquity and great conducting properties (head & current) is the giant carrying all of modern society!
#OreCup is launching with two famous & beloved ore minerals, #Galena vs #Copper!
Vote: www.mineralcup.org/vote-results...
Results: www.mineralcup.org/vote-results...
You have 24 hours to campaign. Go!
Vote: www.mineralcup.org/vote-results...
Results: www.mineralcup.org/vote-results...
You have 24 hours to campaign. Go!
www.mineralcup.org
November 3, 2025 at 8:35 AM
Oooh! Let's go! May the best #copper win!
#OreCup starts in just 30 hours, ahhhh!!
Remember to please limit yourself to ONE vote per player per match. Yes, you can have multiple players using the same device. We love when families gather to debate minerals and whole classrooms of students vote and don't want to hinder that.
Remember to please limit yourself to ONE vote per player per match. Yes, you can have multiple players using the same device. We love when families gather to debate minerals and whole classrooms of students vote and don't want to hinder that.
November 1, 2025 at 7:48 PM
Oooh! Let's go! May the best #copper win!
Here's a preprint of a paper my team at @hartreecentre.bsky.social and our collaborators wrote last year:
arxiv.org/abs/2409.11539
It's an exploration of using #quantum #RNG in #MonteCarlo #simulations with classical #statistics.
arxiv.org/abs/2409.11539
It's an exploration of using #quantum #RNG in #MonteCarlo #simulations with classical #statistics.
Effects of the entropy source on Monte Carlo simulations
In this paper we show how different sources of random numbers influence the outcomes of Monte Carlo simulations. We compare industry-standard pseudo-random number generators (PRNGs) to a quantum rando...
arxiv.org
October 31, 2025 at 6:39 PM
Here's a preprint of a paper my team at @hartreecentre.bsky.social and our collaborators wrote last year:
arxiv.org/abs/2409.11539
It's an exploration of using #quantum #RNG in #MonteCarlo #simulations with classical #statistics.
arxiv.org/abs/2409.11539
It's an exploration of using #quantum #RNG in #MonteCarlo #simulations with classical #statistics.
Finally finished improving the #snakemake workflow for a refutation paper.
Now what's the "law" governing how much time is spent on a false claim vs. how much on its verifiable refutation?
I have no experience with submitting papers disproving others so this is gonna be … interesting.
Now what's the "law" governing how much time is spent on a false claim vs. how much on its verifiable refutation?
I have no experience with submitting papers disproving others so this is gonna be … interesting.
October 29, 2025 at 10:53 AM
Finally finished improving the #snakemake workflow for a refutation paper.
Now what's the "law" governing how much time is spent on a false claim vs. how much on its verifiable refutation?
I have no experience with submitting papers disproving others so this is gonna be … interesting.
Now what's the "law" governing how much time is spent on a false claim vs. how much on its verifiable refutation?
I have no experience with submitting papers disproving others so this is gonna be … interesting.
Reposted
Texting
October 24, 2025 at 3:43 AM
Texting
Reposted
I'm tired of the pressure of always striving for more, better, faster. Money, career, productivity.
I'm a human who lives, not a machine to be tuned.
For a while, I want to just exist comfortably, do meaningful things, rest, enjoy life with loved ones, be creative for the fun of it.
I'm a human who lives, not a machine to be tuned.
For a while, I want to just exist comfortably, do meaningful things, rest, enjoy life with loved ones, be creative for the fun of it.
October 22, 2025 at 2:06 PM
I'm tired of the pressure of always striving for more, better, faster. Money, career, productivity.
I'm a human who lives, not a machine to be tuned.
For a while, I want to just exist comfortably, do meaningful things, rest, enjoy life with loved ones, be creative for the fun of it.
I'm a human who lives, not a machine to be tuned.
For a while, I want to just exist comfortably, do meaningful things, rest, enjoy life with loved ones, be creative for the fun of it.
Looks like we way ahead of the curve at my old uni in 2015, when we required students to present HW solutions at the blackboard and quizzed them about it. Open-book exam? Sure. "ReLu" grading only - if you got an A/1.0 you actually deserved it.
>50% failure rate of students was accepted.
>50% failure rate of students was accepted.
go, student newspaper of Notre Dame and Saint Mary
"employ in-class essays, oral exams+ rigorous discussions — that are far more difficult to use AI tools to complete. a close reading of the text should constitute the bulk in any introductory humanities class."
www.ndsmcobserver.com/article/2025...
"employ in-class essays, oral exams+ rigorous discussions — that are far more difficult to use AI tools to complete. a close reading of the text should constitute the bulk in any introductory humanities class."
www.ndsmcobserver.com/article/2025...
Editorial: AI-proof the Core Curriculum
The Core Curriculum is an essential part of a Catholic education that must be saved from AI.
www.ndsmcobserver.com
October 21, 2025 at 10:49 AM
Looks like we way ahead of the curve at my old uni in 2015, when we required students to present HW solutions at the blackboard and quizzed them about it. Open-book exam? Sure. "ReLu" grading only - if you got an A/1.0 you actually deserved it.
>50% failure rate of students was accepted.
>50% failure rate of students was accepted.
What do the bookies say about his return to politics?
We're not actually sure that his name is George Santos. He regularly surfaces under the names Anthony Devolder and Kitara Ravache.
October 18, 2025 at 3:04 PM
What do the bookies say about his return to politics?
Two:
1. If you have ever used "mathematical masturbation" unironically you've been doing too much "computer porn".
2. Solid formal analysis work is much more valuable than large-scale simulations.
1. If you have ever used "mathematical masturbation" unironically you've been doing too much "computer porn".
2. Solid formal analysis work is much more valuable than large-scale simulations.
Do you have any extremely niche, but serious, ethical stances?
October 17, 2025 at 12:15 PM
Two:
1. If you have ever used "mathematical masturbation" unironically you've been doing too much "computer porn".
2. Solid formal analysis work is much more valuable than large-scale simulations.
1. If you have ever used "mathematical masturbation" unironically you've been doing too much "computer porn".
2. Solid formal analysis work is much more valuable than large-scale simulations.
Reposted
A request for weather interested volunteers!
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
October 16, 2025 at 7:25 AM
A request for weather interested volunteers!
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Got it. Somebody uploaded something to arXiv.
A recent (not-yet-peer-reviewed) study has found that quantum mechanics play a role in wound healing.
www.youtube.com/watch?v=7nb-...
www.youtube.com/watch?v=7nb-...
Quantum Healing Might Be Real – But Not Like We Thought
YouTube video by Sabine Hossenfelder
www.youtube.com
October 16, 2025 at 9:37 AM
Got it. Somebody uploaded something to arXiv.
"Use it or lose it" - true for any skill you have.
OpenAI’s strategy is very clear, it’s trying to get people - especially young people - so reliant on its products intellectually & emotionally (& now sexually!) that going without them becomes unthinkable. And they need signs of that strategy working to keep the funding flowing in
October 15, 2025 at 8:40 PM
"Use it or lose it" - true for any skill you have.
Finally getting close to the final version of a report on failure and extreme event estimation.
Next up: Which paper to submit the concentrated version to...
Next up: Which paper to submit the concentrated version to...
October 14, 2025 at 8:24 AM
Finally getting close to the final version of a report on failure and extreme event estimation.
Next up: Which paper to submit the concentrated version to...
Next up: Which paper to submit the concentrated version to...
Great idea! DnD phone lock - for when you want to ignore most but not quite all incoming messages.
I set my phone to DnD.
You have to roll an 18 or better for me to answer
You have to roll an 18 or better for me to answer
October 13, 2025 at 10:17 AM
Great idea! DnD phone lock - for when you want to ignore most but not quite all incoming messages.
As much as I want the genocide in Gaza to stop - no.
That'd be like giving a kid a reward to stop it from making a mess in the house.
That'd be like giving a kid a reward to stop it from making a mess in the house.
October 10, 2025 at 8:56 PM
As much as I want the genocide in Gaza to stop - no.
That'd be like giving a kid a reward to stop it from making a mess in the house.
That'd be like giving a kid a reward to stop it from making a mess in the house.
Reposted
Very sincerely, we don't do the "lay piles of paper on the ground" type of research enough anymore. This was peak research.
October 8, 2025 at 1:47 PM
Very sincerely, we don't do the "lay piles of paper on the ground" type of research enough anymore. This was peak research.
Reposted
From Ghent to Brussels, the Linux Foundation community will gather to share insights, exchange ideas, and shape the next phase of open collaboration.
Join us Oct 28–30 for three exciting days of discussion, learning, and connection.
www.linkedin.com/feed/update/...
#LinuxFoundation #OpenSource
Join us Oct 28–30 for three exciting days of discussion, learning, and connection.
www.linkedin.com/feed/update/...
#LinuxFoundation #OpenSource
#opensource #lfeuropemembersummit #lfeuroperoadshow #ossecurityforum | Linux Foundation Europe
Who’s joining us in Ghent or Brussels later this month? 👋
We are excited to gather with our community for a series of events that will shape the future of open collaboration in Europe! 🇪🇺
As we build...
www.linkedin.com
October 8, 2025 at 6:05 PM
From Ghent to Brussels, the Linux Foundation community will gather to share insights, exchange ideas, and shape the next phase of open collaboration.
Join us Oct 28–30 for three exciting days of discussion, learning, and connection.
www.linkedin.com/feed/update/...
#LinuxFoundation #OpenSource
Join us Oct 28–30 for three exciting days of discussion, learning, and connection.
www.linkedin.com/feed/update/...
#LinuxFoundation #OpenSource