pglpm

joined 2 years ago
MODERATOR OF
[โ€“] pglpm@lemmy.ca 7 points 3 months ago* (last edited 3 months ago) (2 children)

First listed: Beeper at beeper.com - closed source ๐Ÿค”

[โ€“] pglpm@lemmy.ca 1 points 3 months 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 โ€“ 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...

[โ€“] pglpm@lemmy.ca 40 points 3 months ago* (last edited 3 months ago) (8 children)

The usual misleading sensationalistic title. It isn't the "shape of the electron" at all. A less misleading โ€“ but still not quite correct โ€“ 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 :(

[โ€“] pglpm@lemmy.ca 3 points 3 months ago

Cheers! for some reason my search didn't bring that up!

[โ€“] pglpm@lemmy.ca 1 points 4 months 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!

[โ€“] pglpm@lemmy.ca 2 points 4 months ago

Cheers! ๐Ÿ™ Unfortunately it's the same as on Sci-Hub, the "accepted version". It'll have to do.

[โ€“] pglpm@lemmy.ca 1 points 4 months ago

Restored! Maybe worth a post update?

[โ€“] pglpm@lemmy.ca 5 points 4 months ago (1 children)

It's just part of a player's roleplay.

[โ€“] pglpm@lemmy.ca 32 points 5 months ago* (last edited 5 months ago) (3 children)

"Ethical and legal objections". The point in this case is that what's legal is unethical, and what's ethical is illegal. Analogous to other situations through history and countries, for example in the USA when it was illegal for black people to sit in certain parts of a bus, or in Germany when marriage with Jewish people was illegal.

As human beings, it's always important to make the ethical choice.

[โ€“] pglpm@lemmy.ca 1 points 5 months ago

I'm actually a physics teacher ๐Ÿ˜‚ In fact, as I write in the post, these questions are more about self-reflection. They bring to light some interesting points or issues about Newtonian mechanics and the way we teach it.

Please see my replies in the cross-post https://lemmy.ca/post/33867210

 

I wanted to tag SDF today. A #sdf came up, but it seems to refer to something(s) different. I also saw a #sdfdotorg.

Is there a tag that's sort of "standard" to refer to SDF? Standard in the sense that it's typically used by ~~SDF members~~ [Edit:] Mastodon users interested in SDF.

 

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]
6
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!

 

I wonder how many in this community resonate with this.

 

cross-posted from: https://lemmy.ca/post/2147796

We identify "life" with the capability of self-replication plus some other features. In other conditions, for instance on other planets, it could be possible for self-replication to happen in a way different from the RNA/DNA-based one.

I remember stumbling, years ago, on research and papers that studied this kind of possibility. But I'm having a hard time finding the old references or new ones.

Do you have interesting papers and research material to share about this? Thank you!

 

cross-posted from: https://lemmy.ca/post/2147796

We identify "life" with the capability of self-replication plus some other features. In other conditions, for instance on other planets, it could be possible for self-replication to happen in a way different from the RNA/DNA-based one.

I remember stumbling, years ago, on research and papers that studied this kind of possibility. But I'm having a hard time finding the old references or new ones.

Do you have interesting papers and research material to share about this? Thank you!

 

cross-posted from: https://lemmy.ca/post/2147796

We identify "life" with the capability of self-replication plus some other features. In other conditions, for instance on other planets, it could be possible for self-replication to happen in a way different from the RNA/DNA-based one.

I remember stumbling, years ago, on research and papers that studied this kind of possibility. But I'm having a hard time finding the old references or new ones.

Do you have interesting papers and research material to share about this? Thank you!

 

We identify "life" with the capability of self-replication plus some other features. In other conditions, for instance on other planets, it could be possible for self-replication to happen in a way different from the RNA/DNA-based one.

I remember stumbling, years ago, on research and papers that studied this kind of possibility. But I'm having a hard time finding the old references or new ones.

Do you have interesting papers and research material to share about this? Thank you!

4
submitted 2 years ago* (last edited 2 years ago) by pglpm@lemmy.ca to c/degoogle@lemmy.ml
 

[If this is off-topic for this community, mods please let me know and I'll delete it.]

Edit: Deleting all cookies by hand seems to have solved the problem. Probably related to the bug pointed out by @trackd@lemm.ee in the comments. Cheers!

My browser has an extension that deletes cookies left by any website as soon as all tabs with that website's domain are closed. I can whitelist some of course, but Google's domains (*.google.com,*.gmail.com) are not whitelisted.

What's strange is that if I sign into Gmail, then close the tab or even Firefox, when I go into Gmail again I'm signed in automatically. I have no automatic sign-in functionality in Firefox, so this must happen because Google is saving cookies somewhere โ€“ or am I wrong?

So I don't understand with which URL these cookies are associated with โ€“ it can't be *.google.com, because otherwise they would have been deleted.

Can anyone enlighten me about this?

[Not sure I've been able to explain myself clearly; apologies and let me know in case.]

23
submitted 2 years ago* (last edited 2 years ago) by pglpm@lemmy.ca to c/degoogle@lemmy.ml
 

I have degoogled myself when it comes to email, running self-hosted email & calendar (not my own server). Did it two years ago, and up to now it has worked very well. I don't miss anything from Gmail and have all the features it offered, plus some extra ones (like deleting email attachments via an email client โ€“ย Gmail never deleted them, just archived them).

It's good, however, always to have a backup email address that's not connected with your hosting service. Up to now I've been using Gmail for that, but in view of recent developments, I just want to ditch the whole Google business.

I've seen that many people use Protonmail for this, and that's what I'm considering. I'd like to hear about more possibilities and experiences though. Maybe there's another provider that's friendlier or more consumer/internet-freedom oriented?

view more: โ€น prev next โ€บ