pglpm

joined 2 years ago
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[–] pglpm@lemmy.ca 14 points 1 day ago (2 children)

"In fact, open source is more of a cultural behavior than a commercial one, and contributing to it earns us respect" [the founder] added.

Wisdom.

[–] pglpm@lemmy.ca 3 points 2 weeks ago

United States of chinA

[–] pglpm@lemmy.ca 4 points 3 weeks ago* (last edited 3 weeks ago)

No idea how to read the paper's title. Once upon a time there were things called prepositions, like "of", "for", "with", "on"... Probably now they're too modern-writer reduced cell-activity difficult.

[–] pglpm@lemmy.ca 3 points 3 weeks ago

I wonder which server they use. I've only had headaches trying to use Matrix for collaboration, especially if people were on different servers.

[–] pglpm@lemmy.ca 7 points 3 weeks ago* (last edited 3 weeks ago) (2 children)

First listed: Beeper at beeper.com - closed source 🤔

[–] pglpm@lemmy.ca 1 points 3 weeks ago

The question of what an electron really is, is still open as far as I know. Even the question of whether it's a "particle", is still open. In many or most theories the question of "what it is" is somewhat bypassed. In quantum field theory you describe electrons as a field (like the electromagnetic field), but all fields have the peculiar property that they show energy exchanges in very localized, point-like regions of space – that's why you can think of them as particles sometimes. Take a look at Wald's book to get an idea.

There are even still open theories that try to describe electrons as mini charged black holes; not to speak about strings, and so on...

[–] pglpm@lemmy.ca 40 points 3 weeks ago* (last edited 3 weeks ago) (8 children)

The usual misleading sensationalistic title. It isn't the "shape of the electron" at all. A less misleading – but still not quite correct – explanation is that they have determined the statistical distribution of electron quantum states in a material. Very roughly speaking, it tells us where we're more or less likely to find an electron in the material, and in what kind of state. Somewhat very distantly like a population density graph on a geographical map. Determining such a population density doesn't mean "revealing the shape of a person".

The paper can also be found on arXiv. What they determine is the so-called quantum geometric tensor. I find the paper's abstract also misleading:

The Quantum Geometric Tensor (QGT) is a central physical object...

but it's a statistical object more than a "physical" one.

It's a very neat and important study, and I don't understand the need to be so misleading about it :(

[–] pglpm@lemmy.ca 1 points 1 month ago

Unfortunately they cannot yet be resized on the fly, as instead some vertical-tab extensions allow you to do. But it's a step in the right direction!

[–] pglpm@lemmy.ca 1 points 1 month ago

Restored! Maybe worth a post update?

[–] pglpm@lemmy.ca 1 points 1 month ago

Figuratively or for real?

 

Here's a little physics riddle. It's really meant as a moment of self-reflection for physics teachers (I invite you to compare what answers you'd give within Relativity Theory).

We're in the context of Newtonian mechanics.

There are three small bodies. In the inertial coordinate system (t, x, y, z), we know the following about the three bodies (at a given instant of time):

  • The first has mass 3 kg
  • The second has velocity (1, 0, 0) m/s
  • The third has momentum (2, 0, 0) kg⋅m/s

Now consider a new coordinate system (t', x', y', z') related to the first by the following transformation (a Galileian boost):

t' = t, x' = x - u⋅t, y' = y, z' = z with u = 1 m/s

Questions:

  • What is the mass of the first body in the new coordinate system?
  • What is the velocity of the second body in the new coordinate system?
  • What is the momentum of the third body in the new coordinate system?

Can you give definite answers to these three questions, and motivate your answers with simple physical principles? Note that by "definite answer" I don't necessarily mean an answer with a definite numerical value.

 

cross-posted from: https://lemmy.ca/post/29254007

https://www.lieffcabraser.com/antitrust/academic-journals/

"On September 12, 2024, Lieff Cabraser and co-counsel at Justice Catalyst Law filed a federal antitrust lawsuit against six commercial publishers of academic journals, including Elsevier, Springer Nature, Taylor and Francis, Sage, Wiley, and Wolters Kluwer, on behalf of a proposed class of scientists and scholars who provided manuscripts or peer review, alleging that these publishers conspired to unlawfully appropriate billions of dollars that would otherwise have funded scientific research."

 

https://www.lieffcabraser.com/antitrust/academic-journals/

https://www.forbes.com/sites/michaeltnietzel/2024/09/16/scientists-file-antitrust-lawsuit-against-six-journal-publishers/

https://www.reuters.com/legal/litigation/academic-publishers-face-class-action-over-peer-review-pay-other-restrictions-2024-09-13/

"On September 12, 2024, Lieff Cabraser and co-counsel at Justice Catalyst Law filed a federal antitrust lawsuit against six commercial publishers of academic journals, including Elsevier, Springer Nature, Taylor and Francis, Sage, Wiley, and Wolters Kluwer, on behalf of a proposed class of scientists and scholars who provided manuscripts or peer review, alleging that these publishers conspired to unlawfully appropriate billions of dollars that would otherwise have funded scientific research."

"Deutsche Bank aptly describes the Scheme as a “bizarre” “triple pay system” whereby “the state funds most of the research, pays the salaries of most of those checking the quality of the research, and then buys most of the published product.”"

 

cross-posted from: https://lemmy.ca/post/27749197

I've been trying to use Matrix to replace sites like Discord or Slack. But it seems that if a user creates an invitation-only room in a server, then invited users who are registered on other servers get errors when trying to join. Not very useful error messages either: "Failed to join room". (In my case, I tried creating accounts and rooms at nitro.chat and then at converser.eu, but friends registered at matrix.org don't manage to join).

Quite a let-down. Anyone who's facing the same problem and has maybe managed to solve it?

89
submitted 6 months ago* (last edited 6 months ago) by pglpm@lemmy.ca to c/fediverse@lemmy.world
 

I've been trying to use Matrix to replace sites like Discord or Slack. But it seems that if a user creates an invitation-only room in a server, then invited users who are registered on other servers get errors when trying to join. Not very useful error messages either: "Failed to join room". (In my case, I tried creating accounts and rooms at nitro.chat and then at converser.eu, but friends registered at matrix.org don't manage to join).

Quite a let-down. Anyone who's facing the same problem and has maybe managed to solve it?

 

Doesn't CrowdStrike have more important things to do right now than try to take down a parody site?

That's what IT consultant David Senk wondered when CrowdStrike sent a Digital Millennium Copyright Act (DMCA) takedown notice targeting his parody site ClownStrike.

Senk created ClownStrike in the aftermath of the largest IT outage the world has ever seen—which CrowdStrike blamed on a buggy security update that shut down systems and incited prolonged chaos in airports, hospitals, and businesses worldwide....

 

Can't help imagining Saitama putting a definite end, without so much back-and-forth, to Mahito's hateful smirk. One punch is all that's needed.

 

...and thought of randomly posting it here.

 

Personal websites often give an email address for contact, as a mailto:blah@blah.blah link. And the address is often obfuscated in a variety of ways to avoid its harvesting by spam bots.

If one wants to give one's Matrix address in a website, what's the correct way of writing it as link? is it recognized as any kind of MIME (like mailto:)?

And is Matrix-address spamming something possible and common? In this case, how should one obfuscate a Matrix address given in a website?

Lots of questions from a noob :) Thank you for your explanations!

Edit for others with the same question: as per @QuazarOmega@lemmy.world's explanation in the comments, the Matrix address can be given as the link

https://matrix.to/#/@[yourusername]:[your.server]
8
submitted 2 years ago* (last edited 2 years ago) by pglpm@lemmy.ca to c/firefox@lemmy.world
 

cross-posted from: https://lemmy.ca/post/2217942

In my desktop Firefox I use Cookie Autodelete to keep a whitelist of sites whose cookies won't be deleted. All other cookies are deleted as soon as all tabs for a particular site are closed.

Android's Firefox, from what I gather, only give you two choices: delete all cookies upon quitting (not tab closing), or save them across sessions.

Unfortunately the extension above does not work on Firefox Android, and I haven't found any other alternatives.

Do you know of any alternatives or other solutions, to get a behaviour similar to the desktop one? (And also: how come that extension is not supported on Firefox on Android?)

Cheers!

35
submitted 2 years ago* (last edited 2 years ago) by pglpm@lemmy.ca to c/firefox@lemmy.ml
 

In my desktop Firefox I use Cookie Autodelete to keep a whitelist of sites whose cookies won't be deleted. All other cookies are deleted as soon as all tabs for a particular site are closed.

Android's Firefox, from what I gather, only give you two choices: delete all cookies upon quitting (not tab closing), or save them across sessions.

Unfortunately the extension above does not work on Firefox Android, and I haven't found any other alternatives.

Do you know of any alternatives or other solutions, to get a behaviour similar to the desktop one? (And also: how come that extension is not supported on Firefox on Android?)

Cheers!

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