niconiconi

@niconiconi@mk.absturztau.be

Previously: @niconiconi / Code monkey and sysadmin / No nations, no flags, no patriots. / Chaotic Neutral / Now Accelerationist / currently NEET + hikikomori / 🔐 “Onii-chan is watching you!", use OpenPGP: FAD3EB05E88E8D6D / biologically male, self-identified as '; DROP TABLE genders;

This profile is from a federated server and may be incomplete. Browse more on the original instance.

niconiconi, to random

After a whole day and night of debugging I've finally found why my simulation results were all garbage...

niconiconi,

@ignaloidas it does exist, I don't use it since making all quantities strong-typed doesn't really solve the problem in a meaningful way. In this case, it was a transposed parameter, but it could've as well been a wrong index, a wrong sign, or a bad algorithm implementation, none could've been detected by strong typing, and I need to thoroughly verify it anyway. In fact this problem was finally caught by my symbolic verifier which was made to detect those problems, but I consider it a nuclear option and it was just a pain to set everything up...

niconiconi,

@ignaloidas In C++ it's "wrap it in a templated class or something" which allows a ton of more tricks.

ezio, to random
@ezio@akko.wtf avatar

the original usb 3.0 from 2008 is still rated for 5 gbit/s, so even if this computer isnt 3.1 (which is 10gibt, but the sticker says 3.0) it should be plenty for gigabit ethernet

very strange

niconiconi,

@ezio lsusb -t to see whether the device appears under the "xHCI" controller. If not, it means USB 3 negotiation never happened.

puniko, to random

boops @niconiconi

niconiconi,

@puniko ​:blobcatsign:​

niconiconi, to random

mew mew mew

whitequark, to random
@whitequark@mastodon.social avatar

the problem with telemetry in open-source applications is that the majority of people who use them don't tell anybody about their workflow, so whenever you change something, you have to be prepared for a sudden and unexpected inflow of angry complaints about you breaking something

you could do polls, but that selects for people who would complete a poll, again excluding many who would be touchy about their workflow

niconiconi,

@whitequark or have working patch attached

niconiconi, to random

You don't say...

niconiconi,

Apparently this result is not just a theoretician's math game, it actually has a practical and interesting significance - it's the proposed mechanism of how thunderstorms create gamma-ray flashes in the Earth atmosphere.

niconiconi,

@lanodan That Wikipedia page is basically a infodump of the final results after a paper-long derivation. Like reading optimized compiler machine code...

niconiconi, to random

Q: What is common in both fan-fics and high-energy physics?

A: Pair production.

niconiconi, to random

"filing a bug against Windows 95: When you earned the cloaking device on level 58 [in Wing Commander III] or something, you couldn’t activate it. [..] The problem was that the hotkey [...] was Ctrl+C"

LMAO ​:blobcatlul:​

niconiconi,

@robryk @rq Almost all the old links are broken too ​:blobcatknife:​

ezio, to random
@ezio@akko.wtf avatar

Good morning

niconiconi,

@ezio Good meownyaaaaaa

niconiconi, to random

Good meownyaaaaaaaaaaaaaaaaa

Reiki, to random
@Reiki@bgme.me avatar

然后就想到：在搞出那些东西的过程中还会产生大量碳排放。

而且还有一个是，如果没石油的话整套现代工业体系也就消失了。因为它不光是制成汽油加在汽车里跑那么简单的（ :blobcatdead:

https://nya.one/notes/9thywjr3o1g84p9o

niconiconi,

@Reiki 外星人：石油是如此珍贵的高分子原材料，你们人类就这么放火烧了？！

mia, to random
@mia@void.rehab avatar

With the introduction of Dolby Surround 7.1 in 2010, Sony were eager to put out a full home theater system. One of their early models, the HT-A7.100, included a revolutionary evolution to the standard stereo jack: the 7.1 surround jack, allowing all 8 channels to be sent over one cable.

niconiconi,

@mia I'm hearing the massive DC pop from short-circuiting 7 loudspeakers simultaneously.

niconiconi, to random

Spice Girls imply the existence of HFSS Girls.

niconiconi, to random

The Flat Earthers have increased their sphere of influence and now their believers are all over the globe.

niconiconi, to random

Q: Why can't iOS App Store programs process 32-bit integers greater than 2147483647?

A: Everything must be signed.

lethalbit, to random
@lethalbit@chaos.social avatar

Has anyone used OpenEMS to calculate trace impedance profiles from a PCB stackup before?

I'm looking around for decent and fast 2d field solvers for that kinda thing but outside of like 4 HUGE and expensive software suites there really isn't anything for the at home catgirl

niconiconi,

@azonenberg @lethalbit The best free 2D transmission line field solver is TNT-MMTL. Developed during the 1980s by Mayo Clinic’s Special Purpose Processor Development Group, stopped development and GPL'd in 2004 - it's ancient but it still works. It can be difficult (but possible, after applying patches) to build it on a modern system so it's easier to use the Win32 installer (I was working on a WebAssembly port but didn't have time to finish it). You can find source code and installers on SourceForge, and a few tutorials on YouTube.

niconiconi,

@azonenberg @lethalbit full-wave 3D field solvers like openEMS can definitely be used for this purpose but it's massively overkill for simple transmission lines, and it can also be less accurate since it's extremely sensitive to meshing. Furthermore, FDTD in particular will have great trouble on modeling fine structures like solder masks - you have a 35 micrometer layer on top of a 1.6 mm board. So 2D solvers is strongly preferred to 3D.

niconiconi, to random

"note: candidate expects 0 arguments, 3 provided"

It's what happens when you submit a patch to the project's mailing list.

rq, to random

IBM PC/AT&T

niconiconi,

@rq Sony Personal System/2

niconiconi, to Electronics

Flyback converter without and with RCD snubber. Without snubber, the primary voltage overshooted to 160 V with severe ringing (made worse due to bad probing), creating unnecessary stress on the switching transistor and more interference. After a (10 nF // 68 K) + diode snubber was installed across the primary coil, switching spike reduced to just 120 V, the ringing setting time has also significantly decreased.

Oscilloscope screenshot: With an RCD snubber, overvoltage spikes were eliminated, but there's still significant ringing at turn off.

niconiconi,

CC @gsuberland

  • All
  • Subscribed
  • Moderated
  • Favorites
  • •
  • megavids
  • InstantRegret
  • magazineikmin
  • Durango
  • tester
  • Youngstown
  • rosin
  • khanakhh
  • slotface
  • ngwrru68w68
  • mdbf
  • thenastyranch
  • kavyap
  • DreamBathrooms
  • JUstTest
  • modclub
  • everett
  • anitta
  • GTA5RPClips
  • osvaldo12
  • ethstaker
  • cisconetworking
  • tacticalgear
  • Leos
  • provamag3
  • cubers
  • normalnudes
  • lostlight
  • All magazines
    •