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Last Week in Fediverse – ep 86




Last Week in Fediverse – ep 86




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in reply to Laurens Hof

> Sending out a newsletter over ActivityPub to 5000 subscribers turned out to need 10 servers, which indicates how resource-intensive and expensive ActivityPub can be

I'm interested in the details. I'm guessing Ghost sent out 5000 documents full of bloated HTML markup, big fat images, and tracking cruft. Like people do with email newsletters. If so, not exactly an AP problem.

This is not compulsory, and there may more efficient approaches, requiring much less server power.

(1/2)

in reply to Strypey

What would make more sense in theory is;

1) get the newsletter payload to lose weight

2a) send only metadata and ASCII text. Then... stop. Nobody needs the rest of the cruft.

2b) send only metadata and ASCII text, and have receiving servers DOFV (Down On First View) for the rest.

With a DOFV approach, timing of heavier downloads is staggered, as people view the post at different times. Instead of hitting the sending server all at once. Also, posts that are never seen, never need to be sent.



Largest brain map ever reveals fruit fly’s neurons in exquisite detail


"... Researchers are hoping to do that now that they have a new map — the most complete for any organism so far — of the brain of a single fruit fly (Drosophila melanogaster). The wiring diagram, or ‘connectome’, includes nearly 140,000 neurons and captures more than 54.5 million synapses, which are the connections between nerve cells.

... The map is described in a package of nine papers about the data published in Nature today. Its creators are part of a consortium known as FlyWire, co-led by neuroscientists Mala Murthy and Sebastian Seung at Princeton University in New Jersey."

See the associated Nature collection: The FlyWire connectome: neuronal wiring diagram of a complete fly brain, which also has links to the nine papers

All nine papers are open access!

in reply to zlatiah

So can we model this now?

Can we use this data to essentially emulate a fruit fly's behavioral patterns?

Like can we just wire this up in a software neural network, feed it some inputs, and see what happens?

in reply to Cocodapuf

As far as I understand, not really, as neural networks are more of a metaphor than an analogue. They don't have a one to one correspondence to brain neuron behavior.
in reply to Takumidesh

In a physical (as in physics) sense, it’s because software neural nets are inherently digital, whereas actual neurons function in the analog (in terms of electrical impulses, as well as chemically) domain. We don’t have tech to accurately and effectively represent all of that.
in reply to gravitas_deficiency

Audio is inherently analogue, but you can record it into digital formats just fine.

It's tempting to say "well, that's different though" but it really isn't.

Just like with audio, you'll need high enough fidelity encoding to make it all work, otherwise you end up with garbage.

in reply to Cocodapuf

Based on my understanding of how these things work: Yes, probably no, and probably no... I think the map is just a "catalogue" of what things are, not at the point where we can do fancy models on it

This is their GitHub account, anyone knowledgeable enough about research software engineering is welcomed to give it a try

There are a few neuroscientists who are trying to decipher biological neural connections using principles from deep learning (a.k.a. AI/ML), don't think this is a popular subfield though. Andreas Tolias is the first one that comes to my mind, he and a bunch of folks from Columbia/Baylor were in a consortium when I started my PhD... not sure if that consortium is still going. His lab website (SSL cert expired bruh). They might solve the second two statements you raised... no idea when though.

This entry was edited (4 months ago)
in reply to Cocodapuf

They have a picture/ model / skeleton but can't simulate the data that flows through those structures yet.
in reply to Dkarma

Well there is no "data" per se, there's voltages and a wiring map. And this article is talking about having the complete wiring map.

The neurons deliver electrical pulses across synapses. The thickness and length of the synapse can affect the voltage or amplitude transmitted across to the next neuron. And again, if we have this fairly complete map of synapses, we may have enough information to calculate the electrical outputs of each neuron when it fires.

My understanding is that neurons work something like transistors, they receive signals and when triggered by a strong enough signal, or by enough simultaneous signals, that neuron will also fire and transmit down its synapses. With this alone you absolutely have enough structure for very complex decision making, much like a microprocessor.

I guess the question is really how accurate is this map? If we have a clear enough picture of every synaptic connection, we could simply simulate behavior in software...

This entry was edited (4 months ago)
in reply to zlatiah

We still lack a general theory of neural activity, while mountains of data continue to accumulate. I hope we get closer with his effort.


[PINE64] September Update: Check Your Notes


cross-posted from: fedia.io/m/pine64@lemmy.ml/t/1…

A new community update! New hardware to announced and previous hardware to return!

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in reply to Leaflet

I hope this is a smooth release, I do not want to bork my EndeavourOS. It took so much time to customize it to my personal taste !!
in reply to Leaflet

Xfce having wayland would be a game changer, Especially on low end pcs.

in reply to Super_gamer46861

It's such a culture shock in this comment section but FOSS MalDev is absolutely not as uncommon as you might think. A nice trip down to VxUnderground rabbit hole compiling and deplying some samples is tons of fun for an afternoon for any casual ghidra enjoyer.
This entry was edited (4 months ago)





Bolagsförmedlarna. Ekobrottsmyndigheten (EBM) larmade i september om att så kallade bolagsförmedlare samarbetar med och underlättar för kriminella. Detta bland annat genom att sälja så kallade historikbolag till personer med tvivelaktiga syften och kriminellt förflutet. Dessa bolag anävnds i en mängd brottsupplägg på flera olika sätt.

blog.zaramis.se/2024/10/02/bol…




Mouse, keyboard and clipboard sharing between multiple devices on the same network


Works really well, personally only tested on Linux, but I love it!

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in reply to ReversalHatchery

It's the clipboard, you shouldn't put secure items on the clipboard generally speaking. (We all do it anyway)
in reply to delirious_owl

Password managers are the bees knees if you have to use a password, I do like the authenticator only logins especially if you have an obnoxious number of sites you have to login to. I will say though, that clipboards are tricky especially in an environment where VNC/Screen Connect etc are actively used. Screen Connect especially will happily grab the clipboard contents and share it with the other user.
in reply to Kalkaline

Probably shouldn't use software that will remotely log and upload things that you store to your keyboard. Should have a policy against that.
in reply to Kalkaline

that too, but not just that. how does access control work, how is memory safety around the receiving and authenticating code, is the traffic encrypted and how..because keystrokes, and I think mouse actions are also sensitive
in reply to falx

Does this have any benefits over barrier? It seems like it’s the same thing but flashier.

in reply to RobotToaster

Road to success (2024 AI Hype Edition):

  1. Clone VSCode.
  2. Rename it as LSCode, squash all history, and create some random commits with --author="Linus Torvalds <torvalds@linux-foundation.org>".
  3. Add a character AI that calls your code garbage.
  4. Profit.



how output `ps aux | grep aUser` and keeping Newline ?


Hi,

by doing a

ps aux | grep UserName

The output do not keep the LF1 😡

I've found some solution online by they involve 3 or more pipe | !

On my side, I've made this

ps -fp $(pgrep -d, -u UserName)

But still I found it not super human readable.

Is their a native way with ps to filter users ? or to grep it but the keep the LF ?


  1. linefeed en.wikipedia.org/wiki/Linefeed… ↩︎
in reply to Gordon_F

tbh you should prolly use pgrep instead of piping ps into grep
in reply to Gordon_F

I'm not really sure what it is you're asking for here. As another commenter said, ps outputs a list of newline separated entries (using \n, the standard LF character). I even ran some sanity checks to make sure it wasn't using \r\n (CR LF) with the following:

$ ps aux | grep $USER | tr -cd "\n" | wc -m
14
$ ps aux | grep $USER | tr -cd "\r" | wc -m
0

The output of ps aux | grep $USER is consistent with the formatting of ps aux. I also found that ps aux | grep $USER was consistent with ps -fp $(pgrep -d, -u $USER) except that ps -fp $(pgrep -d, -u $USER) shows the header (UID PID PPID C STIME TTY TIME CMD), does not show the processes related to the command (entries of ps aux and grep --color=auto $USER), and does not show grep's keyword matching by highlighting all matches within a line. It is otherwise completely identical.

Can you provide the output that you are getting that is unsatisfactory to you? I don't think I can otherwise understand where the issue is.

This entry was edited (4 months ago)


Osmakligt av Dadgostar med Kamala Harris-keps. Nooshi Dadgostar poserade på Instagram med en Kamala Harris-keps. Det är djup osmakligt med tanke på USA:s stöd för folkmordet i Gaza såväl som deras stöd till angreppet på och invasionen av Libanon.

blog.zaramis.se/2024/10/02/osm…



Kvotråden för Nordatlanten innebär en minskning för makrill och kolmule (blåvitling). Internationella havsforskningsrådet (ICES) har presenterat sitt kvotråd för norsk vårlekande sill (NVG-sill), kolmule, makrill och västlig hästmakrill (taggmakrill) för 2025. Brist på internationella överenskommelser och fiske över ICES råd, dvs mer än vad som anses hållbart, är ett problem både för makrill, NVG-sill och kolmule.

fiske.zaramis.se/2024/10/02/kv…


Unknown parent

lemmy - Link to source
Yi K
I think it’s just Mozilla has a messy moderation. Don’t overreact.
in reply to GreyEyedGhost

Ahh, old hanging balls, gotchya xD

Yeah the medium of text can be tricky to convey meaning sometimes, I'm a pretty sarcastic person (gotta love using humour to cope with every situation, so healthy...) with a very deadpan kinda delivery on a lot of it, so I often find myself wondering if my intent came across well over text. Tricky indeed.

Anyway you're cool, and thanks for taking the time to reply so thoughtfully :-)

Now, I'm going to go back to being drenched in a cold sweat! It seems that's today's COVID symptom roulette wheel choice! 💦☉_☉💦