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/tech/ - Technology

"Technology reveals the active relation of man to nature"
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File: 1629411643921.png (40.96 KB, 1080x842, LMAO_PHP.PNG)


Can someone explain to me why pic related is a feature in PHP? I feel like an insane person saying variable variables.
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Pretty sure PHP also has a means by which you can transfer a reference of a variable with &


It's so you don't have to implement your own hash table.


>web development
>useful technology


Maybe it was a side effect of how PHP used to work and they decided to turn it into a feature. You would have to look into its history to figure out when and why was added.


The purpose of variable variables is making your code harder to read and prone to hilarious bugs, so you're figuratively holding your employer at gunpoint and they can't fire you.

File: 1628429077559-0.jpg (43.27 KB, 1000x631, nuclear spacetug1.jpg)

File: 1628429077559-1.jpg (76.14 KB, 1024x511, nuclear spacetug2.jpg)

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Russia is building a new spaceship they call Zeus, it's made by Roscosmos and it's a nuclear powered space tug.
It uses a regular chemical first-stage booster for going to orbit, but once in space they say it will be very fast and out run anything using chemical thrusters. Apparently Russia never stopped working on space reactors, and they do seem to be on track for meeting their timeline to get this thing operational in 2030. It's apparently meant to out-compete Spacex starship in interplanetary travel in speed and cost. It's not a direct nuclear propulsion it's a nuclear reactor powering a plasma thruster, so it's less hardcore than direct nuclear propulsion like an Orion-drive but it's also more realistic that it will actually take flight.

Does anybody know how well this will work ?
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Anon nuclear rockets have existed since we've had nuclear power. the main drawback to nuclear powered rockets is heat tolerance. The thing about rocket engines is, well they're really fucking hot like thousands of degrees hot as predominantly air and hydrogen molecules are moving at extremely fast speeds, this often times means that speed can be so high that the diffused heat can pour into the engine itself leading to the engine just well heating up until it's broken causing explosions as all the energy in the rocket is released at once. Modern nuclear rockets can tolerate heats of up to 6000 degrees but that also means the risk of a rocket randomly exploding is 1 in a 100, to give you an idea of how dangerous that is a conventional plane used to transport civilians from country to country has a chance of exploding of 1 in 4 500 000.


Is there really such a big risk of explosions ? If there is, wouldn't it be logical to use a nuclear pulse propulsion that already uses explosions during normal operation ? That way explosions won't be a big deal because it's designed for it.

If you have such a problem, you can either add more safety systems to try to minimize the risk, or go into the opposite direction and design the system to make use of what causes the problem.


>Is there really such a big risk of explosions ?
Spaceships cost billions simply to assemble having a risk factor that high is gonna cut into budgets
>nuclear pulse propulsion
That still requires gaseous substances moving at speeds high enough to create massive amounts of heat, and that heat needs travel through the engine and be ejected to create thrust. Anon building an entirely new engine isn't a solution, building something that can contain and diffuse all that heat is one like having a container of water be boiled by the thrusters before being cooled again by having that water's heat diffuse into the igniters turning back into liquid, but finding a contraption that would do that would be costly and likely take alot of experimentation since this is a rocket not a vehicle were talking about here


>That still requires gaseous substances moving at speeds high enough to create massive amounts of heat, and that heat needs travel through the engine and be ejected to create thrust.
No it doesn't, nuclear pulse propulsion drops little hydrogen bombs out the back of a space ship which then explode behind the vessel. The little bombs are shaped charges that eject most of the shock-wave against a pusher plate on the back of the ship. That pusher plate is a kind of suspension that reduces the shock of the explosions and turns kinetic pulses into mostly linear acceleration. The plate also acts as a massive shield that protects the ship from nuclear explosions. There is no internal drive system other that a little bomb ejection system.


File: 1629869116552.gif (2.46 MB, 320x320, 1629420775452.gif)

>it doesnt need gas it just needs super heated hydrogen molecules

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Some breakthroughs have led me to finally and definitively abandon microshit's spyware.
I had been staying on wangblows for the audio software but had no idea Linux production had come so far.

My DAW [Renoise] has a fucking excellent native linux version that exceeds WIndows performance in some cases. Grabbing audio to feed into its sampler is easier than ever with youtube-dl and ffmpeg.
yabridge lets you convert Windows VSTs to run through Wine, the ones I've tried have worked seamlessly albeit with a little overhead.
Takes a tiny bit of elbow grease to get it optimized enough for serious use, but it's pretty simple once you get past initial setup and it even supports VST3.

Feels pretty good to be making music on a system I have so much control over, it's actually given me a lot of inspiration to work on new material.
Are you a composer or producer who runs Linux? What's your workflow/software?
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i use bitwig (pirated ofc too - btw what version is yours? i have a 3.something) on ubuntu studio, and it crashed my whole computer, which is super rare for linux. It was weird

I'll tell you if it works with guitar when i get that set up

i heard gen3 doesnt work well with linux possibly?


It's great that they are. For intensive single-purpose machines like video editing rigs, Linux often has a better capability to specialize and ends up being the smarter base to use to get the most out of the system without making a system from scratch, so we've now seen official professional support on a couple of OSs for Davinci Resolve, for example (my sore spot was video editing). I had heard many times audio production like DAWs were always a sore-spot for Linux along with CAD, so it's good to see progress being made. Getting VSTs to work is awesome because it would be a killer to not have sausage fattener :^)
>Are you a composer or producer who runs Linux?
I make shitty mashups, remixes and plunderphonics in Audacity. I guess that doesn't qualify.


Using 4.0.1 from

Lmk if you get a guitar sorted out, and what stack you use for that.


I've been trying out Rosegarden and I really like the simplicity of it. It's how I imagine how Cubase was in the 90s. Ardour is a good audio recorder, but is a bad MIDI editor so I just do it with Rosegarden.


>I've got a Nix derivation that builds a cracked version of Bitwig for me automatically, feelsgoodman
Link to this crack?

File: 1629663628839.png (551.99 KB, 1062x649, thumbsup.png)


A thread for posting PDFs related to software, IT, programming, hacking, networking, math, technology, engineering, and science in general.
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covers tcp/ip and ipv6 in detail


hacking: see pdfs in >>2934


artificial intelligence


File: 1629666572610.pdf (1.01 MB, 200x300, compilerbook.pdf)



distributed systems (tannenbaums book as djvu in zip, pdf too big at like 191 mb), second book good also

File: 1629577189321.png (42.62 KB, 720x1498, how would it work.png)


How would a nuclear fission battery work?


Not practical, what you have is nuclear decay batteries (radioisotope generator) where unstable radioactive elements provide heat and electricity as they decay into a more stable substance.


>nuclear fission battery
beta cells already exist


What you guys are describing is using the natural decay of a substance as fuel for a nuclear battery. What I'm referring to is the direct transfer of electrons through the collisions of particles


File: 1629626315338.jpg (50.49 KB, 1200x800, nuclear battery.jpg)

If you want more than just isotope decay and instead want something that has a sustained fission reaction you are talking about a miniaturized nuclear reactor. The really small ones that fit inside a shipping container which aim to be set and forget (for about a decade) also are sometimes called nuclear batteries. Is that what you mean ?


Yeah thanks


Would you support technology programmed with a motive and attitude that is highly related to marxism-leninism? Hypothetical: Creating a program that would make planning easy for the worker – collecting data (from searx) only to seed it as a torrent… I could also go for one based on collective reflexology. The collective without inhibiting influences could be met with the access to information.
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Well to answer the idea, I've done archivist work using bots. It's based as fuck. I'm totally in support.

Not me but peak comfy. https://the-eye.eu/public/Random/ytarchiving_1.mp4


>ok what information specifically are you talking about ?
By information I mean the power of organization acquired through deep learning – businesses have this with money in mind but not the revolutionary proletariat…

>i'm guessing this isn't about pressure points on your feet, you got a pdf of that book ?

Unfortunately no. The PDF is fifty fucking bucks, and hard copy is about 152$. I bought the hard copy before the price skyrocketted. This is because of Amazon's nature though.


Nice :o


Ok so machine learning for the proletariat, that sounds good but, I'm not sure what you mean with this concretely.
>hundredfifty bucks
Is the Bezos book store price gouging ? Or are they doing this to prevent the book from being sold ?


Not sure. I might type one up myself…

File: 1624224280351.png (198.34 KB, 512x337, hacker.png)


Please dump any resource I can use to teach myself, including online communities I can join for questions.

Is Python optimal?

Thanks in advance
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Off topic this is, but somewhat relevant.
So some of these are targeted at Linux.
Is this a problem.


Interesting. Thank you.


This blog really cant be overstated in its quantity of quality work.


check the reading list in >>2934

File: 1608526235974.png (250.14 KB, 2331x2400, hammer-keyboard-2.png)


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Holy shit we got the next Sherlock Holmes here.


>What's really funny and contradictory is that without capitalism you wouldn't have the hardware or internet to post or host this project from
>what is ussr computers


All that technology was developed by dynamic public and state sector research, Capitalism doesn't create technology it just sell's it.


did this die


You guys should do away with the soviet/communist aesthetics and just call it a democracy app… communism at the end of the day is true democracy. it will make it palatable to the brainwashed sheep.

File: 1628763320531.jpg (27.27 KB, 479x361, getinhere-debian.jpg)



I've been waiting patiently


>new Debian stable release
practically a once in a lifetime event


File: 1628793558011.png (468.58 KB, 5791x8191, debian-stable.png)

it's not old, it's stable


I see leftypol.org is working again. bumping this to say I got all my machines upgraded to Bullseye without issues

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I swear to god, the ONLY reason to use paint.net is that its lightweight. If they start trying to change it now and bloat it it will fucking fail. After the last update its taking so long to startup I might as well have opened photoshop. Why would they do this?


why the fuck tom holland never says shit like this, it would be fun

is paint.net the best photoshop alternative


GIMP is open-source

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