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/tech/ - Technology

"Technology reveals the active relation of man to nature" - Karl Marx
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File: 1630384736287.jpg (116.52 KB, 1200x1785, 1200px-Batterydura.jpg)

 No.10937[Reply]

How do we make longer lasting and even more powerful batteries?
4 posts and 1 image reply omitted. Click reply to view.

 No.10976

>>10964
Smart idea

 No.10978

>>10964
If they're recyclable I'm all sold, but if you have to change your car's batteries every week the trash will reach outer space

 No.11084


 No.11085

>>11084
Allegedly coming "in the next year" for decades now.

 No.11092

>>10937
>How do we make longer lasting and even more powerful batteries?
research

>>10939
>light weight
>high capacity
>long lasting batteries
>cheap
anon I

>>10964
you can "recharge" them by electrolysing the resulting alumina back into aluminium



File: 1628206484026.png (205.89 KB, 720x1498, energy.png)

 No.10606[Reply]

So how does humanity extract more energy?
26 posts and 6 image replies omitted. Click reply to view.

 No.11062

>>11061
I'm not aware how good dams are, but nuclear is the greenest energy we have.

 No.11063

File: 1630852365012.gif (1.21 MB, 640x360, bertie_dakota4.gif)

>>11048
>why? why doesn't this work on earth?
it does and it is orders of magnitude easier to do on Earth

>>11061
you can use pumped hydro with both solar and wind, retard. also solar is highly predictable. if we build a good enough long-distance grid (think 10 MV or more) then we can literally have 24/7 solar power everywhere

 No.11064

>>11034
all in all, your post is pretty heavy on the liberal ideology. You place our current way of living as the one with no coercion, and then say that people can just "abstain" from it - both are very false, on the first account because people have had to have this way of life forced on them for the development of productive forces lead by greedy capitalists, and on the second account because the problem is obviously not just my own personal amount of energy use, but the impact it has on the state of our whole world. Imagining that "business as usual" is neutral and can't be transgressed against without you being an villain, and that social problems can be reduced to individual consumption/abstention, is peak ideology.

so, self crit comr8

 No.11065

>>11062
nuclear is pretty good, france produces >80% of its power that way.
keep in mind it is dangerous and you need to get rid of wastes
>>11063
>pumped hydro
this has to be the funniest meme I have read for a while, there's no such thing as decent energy storage for big scale projects.
>if we build a good enough long-distance grid (think 10 MV or more)
10 MV? assuming you meant 10 MW, it's still negligible considering the average nuclear plant

https://en.wikipedia.org/wiki/Fessenheim_Nuclear_Power_Plant

Solar doesn't produce enough AND is more polluting considering manufacturing, maintenance…

 No.11068

>>11065
>keep in mind it is dangerous and you need to get rid of wastes
The waste of nuclear is less harmful than fossil fuels tbh. And new gen reactors can utilize near 100% of uranium fuel from what I heard.



File: 1608526260021.gif (588.77 KB, 200x116, 160038497950s.gif)

 No.4703[Reply]

Thread for creating and sharing and discussing ACSII art.

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34 posts and 1 image reply omitted. Click reply to view.

 No.11042

>>11041
ah there's a code bbcode tag

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 No.11043

>>11042
getting better at using aview

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 No.11044

>>11043
this is fun
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 No.11045

>>11044
here's my workflow for those wondering:
1) open image in gimp, paint black over any background crap. sometimes inverting the image first works better
2) save as .pnm
3) aview -driver curses filename.pnm
4) press u238 to turn off any ANSI control codes
5) press left to adjust the image left
6) adjust contrast (.,) gamma (';) and brightness (<>) until it looks good
7) copy-paste text to where you want it. don't bother with the save functionality unless you need HTML output or something

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 No.11047

>>11045
last one for now

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File: 1608526364816.jpg (22.03 KB, 296x190, 1472049407749.jpg)

 No.5657[Reply]

I recently gotten myself on some books on how to do Java Script again. I came here today to ask what is the programming languages that are worth learning.

Because I think that people still use Java Script but not as nearly as much as other programs. I want to do this on my off time as I look for a job again. That way I can just have something useful other than my knowledge of historic events and wanting to preserve the artifacts.
18 posts omitted. Click reply to view.

 No.5744

>>5743
dont believe this man, probably a LIBTARD

 No.5746

>>5744
cope

 No.5758

>>5742
also the setup necessary to get javascript running is minimal.
to get C compiling? lol. good luck.

 No.10857

File: 1630015109080.png (590.53 KB, 1934x1027, paradigmsDIAGRAMeng108.png)

> A language that doesn’t affect the way you think about programming, is not worth knowing.
Think about this the next time your are choosing a language to learn. It's worth knowing at least one language of the big paradigms: Prolog, Smalltalk, SML, Pascal, etc.

 No.10943

>>5657
Learn Forth, Fortran and APL
These languages get you a fuckton of money but nobody knows that



File: 1630313109332.jpg (24.42 KB, 1200x800, Substack.jpg)

 No.10926[Reply]

Hi tech, I run the site New Multitude which often features contributions from leftypollers.

Currently the site is run on a wordpress site that I had someone on fiverr build for me. It's ok, but I kinda want to streamline things and not have to worry about the site. I also want to transition the site to more high quality articles, and put quality above quantity. For these purposes, substack seems like a good deal? I wouldn't have any paywalls and I believe substack lets you use it for free too? I also kinda think that i terms of 'branding' the .substack url is a good one these days


Before I make the switch though, does anyone here want to dissuade me or suggest alternatives?

 No.10931

>>10926
get in contact with the leftypol.org tech team in the matrix chat, they can probably give better advice

 No.10934

Sounds like a fad that will fade soon. If you don't have any issues with the current wordpress it is probably not worth switching.



 No.10892[Reply]

How do we improve modern cargo trains
6 posts omitted. Click reply to view.

 No.10900

>>10898
you are missing the most important advantage of electrifying rail, you can put a relatively simple computer into a rail-car add a small motor and voila , you can send individual rail cars over the rail network like it's a tcp/ip packet. Putting a slightly more sophisticated computer into the rail-track switch, to automatically rout the rail cars is simple enough. It's a little tougher to get good security but if you make the auto-packet-cars small enough they won't do much damage nor kill anybody if they crash into a regular train, but they will help get much higher value out of the tracks and existing infrastructure.

 No.10901

My impression from reading the local railway workers' magazine was that the main issue with rail transport, at least where I live, are the rails themselves. You can buy new, more powerful engines, but they are worthless if your lines are in disrepair and you can't go safely faster than 60 km/h. Take a look at the max speeds on this map: https://www.openrailwaymap.org/

 No.10910

we should split the trains into small individual carts or "pods", put them in a near vacuum tube and making them really fast and with RGB lights that would be cool i tihnk

 No.10911

File: 1630250962931.jpg (43.65 KB, 992x235, hyperlon.jpg)

>>10910
maybe we could connect multiple pods together, shrink the tube until it's 2 metal strips on the ground and roll with it

 No.10912

>>10910
Even better let's make a company called virgin, take a failed design off the british government in the 80s and call it "virgin hyperloop"



File: 1629844996454.jpg (942.35 KB, 1242x1394, 1626936911213.jpg)

 No.10824[Reply]

What are some good file hosting/sharing services in terms of OPSEC? I don't want to use Google Docs or any of their services for obvious reasons so I would like to hear anonymous opinions rather than some website that might be biased towards one service or another over financial reasons.

I'm mainly asking because the file limit here is too small for me.
3 posts omitted. Click reply to view.

 No.10841

>What are some good file hosting/sharing services in terms of OPSEC?
This sentence literally doesn't make sense.
What's your threat model?

 No.10861

>>10826
if you care about OPSEC you shoud stick to onionshare

 No.10879

>>10841
>What's your threat model?
Everything.

 No.10880

>>10879
<What's your threat model?
>Everything.

⣿⣿⣿⣿⣿⣿⣿⣿⡿⠿⠛⠛⠛⠋⠉⠈⠉⠉⠉⠉⠛⠻⢿⣿⣿⣿⣿⣿⣿⣿
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 No.10881

>>10880

⣿⣿⣿⣿⣿⣿⣿⣿⡿⠿⠛⠛⠛⠋⠉⠈⠉⠉⠉⠉⠛⠻⢿⣿⣿⣿⣿⣿⣿⣿
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File: 1629871806065.png (1.85 MB, 1920x1152, fuck webp.png)

 No.10829[Reply]

What's /tech/'s opinion on electric vehicles (EV)?
I want to be excited about them but capitalism has made me weary about tech progress and I fear what could porky do to ruin EVs, like putting DRM on them or something.
Otherwise they're really cool and I'd enjoy a thread about them.
9 posts and 4 image replies omitted. Click reply to view.

 No.10843

>>10833
>vehicles design matters more than what it's powered by
And this is why filter technology for ICEs makes emitting as much CO2 as during the production process of Li-Ion batteries near impossible. Vehicle emission regulations are also easier to enforce, than emissions during battery production.
Sadly car manufacturers try to circumvent these anyway and now the most vocal persons of my country think of ICEs and especially diesel motors (even though these emit the least with a standard filter) as "dirty". The state is now in the perfect position to pump car manufacturers full of money for research on EVs and graciously "lure in" EV manufacturers from the USA under the guise of "climate justice".

I'm surprised no one mentioned the safety implications of lithium batteries. By design they offer "less flammable material" than gasoline, yet defective design enabling heat runoff frequently leads them to spontaneously catch on fire https://en.wikipedia.org/wiki/Plug-in_electric_vehicle_fire_incidents

 No.10847

>>10833
Best take in this thread so far, I would also add that lithium batteries are notorious for having fires that are extremely hard to put out

 No.10851

>>10839
I've always assumed that the Bolivian coup was about the CIA simply stomping on leftists in general out of habit, rather than a plan with a specific goal.

 No.10854

File: 1630010418172.jpg (23.64 KB, 539x379, EksIy3aW0AEIsK-.jpg)

>>10851
Nah, elon musk openly stated his influence in the country and what his intentions were. fucking sickening man

 No.10874

I wish I hadn't made this thread before reading about other alternative fuels. Right now I'm fascinated with natural gas vehicles, they were widely promoted in my country and supposedly there are lots of them in circulation but because most of them are conversions they're invisible unlike electric cars. In the end natural gas is not much of an improvement, it still has significant CO2 emissions and it's so dangerous and awkward to install that natural gas motorcycles are a pipe dream, vid related is a natural gas motorcycle and it's just so awkward to even look at it and because it only has a small tank it probably can't go too far and if you get in a crash it'll explode, what a disappointment.



File: 1629411643921.png (40.96 KB, 1080x842, LMAO_PHP.PNG)

 No.10756[Reply]

Can someone explain to me why pic related is a feature in PHP? I feel like an insane person saying variable variables.
1 post omitted. Click reply to view.

 No.10758

>>10757
>>10757
Pretty sure PHP also has a means by which you can transfer a reference of a variable with &

 No.10770

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

 No.10771

>web development
>useful technology

 No.10780

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.

 No.10837

>>10780
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)

File: 1628429077559-2.jpg (29.25 KB, 730x423, nuclear spacetug3.jpg)

 No.10628[Reply]

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 ?
6 posts and 1 image reply omitted. Click reply to view.

 No.10815

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.

 No.10821

>>10815
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.

 No.10822

>>10821
>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

 No.10823

>>10822
>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.

 No.10828

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

>>10823
>it doesnt need gas it just needs super heated hydrogen molecules



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