@robryk@qoto.org avatar

robryk

@robryk@qoto.org

I enjoy things around information theory (and data compression), complexity theory (and cryptography), read hard scifi, currently work in infosec, am somewhat literal minded and have approximate knowledge of random things. I like when statements have truth values, and when things can be described simply (which is not exactly the same as shortly) and yet have interesting properties.

I live in the largest city of Switzerland (and yet have cow and sheep pastures and a swimmable lake within a few hundred meters of my place :)). I speak Polish, English, German, and can understand simple Swiss German and French.

If in doubt, please err on the side of being direct with me. I very much appreciate when people tell me that I'm being inaccurate. I think that satisfying people's curiosity is the most important thing I could be doing (and usually enjoy doing it). I am normally terse in my writing and would appreciate requests to verbosify.

I appreciate if my grammar or style is corrected (in any of the languages I use here).

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

sarahjamielewis, to random
@sarahjamielewis@mastodon.social avatar

Software request: I'm looking for a tool I can use to manipulate nodes in a graph. Specifically I would like to be able to:

  • Add new nodes to the graph (not a tree)
  • Create multiple distinct edge relationships between nodes (bonus if the tool lets me formalize these edge types)
  • Have nodes contain notes, perhaps be typed
  • Export the graph to a reasonable (text) file format for external processing
  • Explicitly not an image editor or diagram tool.
  • Run on linux / be open source (flexible)
robryk,
@robryk@qoto.org avatar

@sarahjamielewis

Do you want to see the whole graph in one view, with each node having some (editable) position, or do you envision some other visual representation?

I'm asking because you mention thousands of nodes, and that seems like something that can be wieldy in single-sheet setup only if it's really sparse.

_thegeoff, to Cosmology
@_thegeoff@mastodon.social avatar

folk: the universe as-is exists because the very early stages had density variations, stuff clumped. That's fairly obvious, the odds of the universe being perfectly evenly distributed are basically impossible, only one way to do it (and, quantum, not even allowed?)
So what's the thinking on how unlikely our "unclumpiness" is? Compared to...I don't know, perfect homogeneity versus weirdly clumpy?

robryk,
@robryk@qoto.org avatar

@_thegeoff @ottaross

Clumpiness needs some notion of scale: at some scale, a big ball of water is extremely clumpy, because most of it is ~empty and there are some very heavy nuclei strewn around. At more coarser scale, it's very uniform.

(At sufficiently coarse scales ~everything becomes uniformish, but the coarseness of that scale depends on the thing and IMO there might be multiple changes back-and-forth below that.)

sgf, to random
@sgf@mastodon.xyz avatar

Random fun fact: They don't want you to think too hard while waiting for your PET scan in case it makes your brain glow.

(Some technical liberties may have been taken with this explanation.)

robryk,
@robryk@qoto.org avatar

@sgf

I never really understood why: signal strength of brain compared to everything else is not used diagnostically. I don't think PET is so close to the acceptable SNR boundary that the amount of "shiny glucose" this takes away from everywhere else matters (or am I wrong?). Or does this introduce variations within the brain that might be confusing?

Also, good luck getting some people not to think too hard :)

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:​

robryk,
@robryk@qoto.org avatar

@rq @niconiconi

Sadly one of the MS blog migrations got rid of all the comments :/

timorl, to random
@timorl@social.wuatek.is avatar

I’ve been struck by inspiration, but I cannot find the “rejects gender/collects gender for nefarious purposes” comic which I need for nefarious purposes, anyone has it by any chance?

robryk,
@robryk@qoto.org avatar
quaap, to random
@quaap@toot.io avatar

As I walk through the valley of the shadow of death, I think: Wow Google Maps, you really fucked up this time

robryk,
@robryk@qoto.org avatar

@quaap

"The spectral wolf fears only fire. The Google Maps team can no longer help, but if you master the wolf, he will guide you. Godspeed."

whitequark, to random
@whitequark@mastodon.social avatar

for most of my life when i did play games i'd play shooters simply because it was something that i found that distracted me from overwhelming chronic pain, and i didn't think about it much if at all

so now that i've recently realized that you can, and should, outsmart and outplan the enemy, the experience completely changed for me

robryk,
@robryk@qoto.org avatar

@whitequark

You mean shooters where you play against people or against bots?

foone, to random
@foone@digipres.club avatar

I saw this voltmeter at the electronics flea market. Look at that massive probe! It looks like you need to check your back blast before using it.
Apparently it's for REALLY high voltages? Like, 3kV?

robryk,
@robryk@qoto.org avatar

@foone

What's the dial on the probe?

robryk,
@robryk@qoto.org avatar

@domi @foone

I expect that the probe is scaling the voltage down for the multimeter (this is what HV oscilloscope probes do).

robryk, to random
@robryk@qoto.org avatar

Today in people are nice:

I saw a small corvid that was sitting suspiciously motionlessly on a kerb. I was running for a short distance, so didn't even have a phone with me. Before I could think of whether I should go back for my phone and a box (and hope the bird didn't hide) or ring a random doorbell a woman with a cardboard box appeared.

phil, to random
@phil@social.kern.pm avatar

Where we are going, we don't need no rails.

robryk,
@robryk@qoto.org avatar
robryk,
@robryk@qoto.org avatar

@phil Nope, GPS was right. They made tiles from OSM once and didn't refetch them for years while the tram network was built out.

whitequark, to random
@whitequark@mastodon.social avatar

wields webassembly and looks at clang with criminal intent

robryk,
@robryk@qoto.org avatar

@whitequark

You mean compiling llvm itself to wasm? A friend of mine compiled clang to wasm and used that to make an in-browser thingy that can run your C++ program on a given input: https://wasm-ide.lucaversari.it/

erin, to random
@erin@quiescent.nexus avatar

I deliberately chose a sewing machine that contains zero thinking sand - and yet, I get a deadlock due to multithreading issues on my first day of using it.

robryk,
@robryk@qoto.org avatar

@erin do you know how modern seeing machines do variable speed control? (I started wondering whether the PSU contains thinking sand.)

b0rk, (edited ) to random
@b0rk@jvns.ca avatar

in git, what ways are there to "lose" a commit in a way that you CAN'T recover using the reflog (so that you need to iterate over every single commit in the repository if you want to find it?

The only ways I know (using git's normal tools) are:

  • using git stash drop or git stash pop to drop a stashed commit
  • waiting 90+ days to try to recover the commit (so that it expires from the reflog)
  • explicitly deleting the reflog in some way (rm -rf .git, git reflog expire, etc)
robryk,
@robryk@qoto.org avatar

@b0rk

Explicitly deleting the reflog entry/pruning the reflog (git reflog has subcommands for both, git gc can be explicitly given the age threshold).

I'm not sure what happens with the per-branch reflogs when you delete the branch and per-worktree reflogs when you delete the worktree.

foone, to random
@foone@digipres.club avatar

Properly photographing a 3.5" floppy disk for archival is annoyingly complicated. The label has THREE sides!

I've already built an automated system to take a picture of the front of a disk, but really I need to take THREE photos if I want to get the whole thing.

That means either three cameras or I need to rotate the disk 90° and then 180°, which is going to really stress the limits of my mechanical engineering skills.

robryk,
@robryk@qoto.org avatar

@foone With some more mirrors you could get all 3 distances to be closer to equal (getting them exactly equal is not that helpful given that even one side is not at a constant distance from the focal point, unless you arrange for some lens arrangement that has an effective focal point very far away).

robryk,
@robryk@qoto.org avatar

@foone

If you let the disk fall/slide into a slot shutter-side-first (and stop it there for a while, presumably with another servo) you could probably use the same camera for front and side.

nisjasper, to modeltrains German
@nisjasper@literatur.social avatar

So my 12 year old kid loves to death: machines, tracks, landscapes, everything. Unfortunately, this is a hobby dominated by grumpy old men, some of whom don't react too cool towards a rainbow family. Are there any familys out there with ? , Germany, wherever? I am thinking exchange of photos or small films, maybe sending stuff to and fro, meetings in Germany at some point. German, English works. Neurodivergent kids/parents welcome.

robryk,
@robryk@qoto.org avatar

@nisjasper

I can't answer your question really (I'm somewhat of a loner and trains are a thing I'm comparatively less into), but want to suggest another potential direction: there are people who are very much into rail signaling systems: simulating them, using them in model rail, restoring physical hardware, operating full country-sized simulated rail networks, ... I don't know whether that's less conservatively-grumpy area.

patcharcana, to random
@patcharcana@furry.engineer avatar

If you had like, a really fine router, like a dremel-bit router, and a steady hand...

Could you make a wooden-substrate PCB?

robryk,
@robryk@qoto.org avatar

@patcharcana Why would you need a wooden substrate for that? Various substrates I've seen were all nicely dremelable (cutting traces with a small dremel always worked really well).

robryk,
@robryk@qoto.org avatar

@patcharcana the most wooden ones I've seen were made from pressboard fwiw

grimalkina, to random
@grimalkina@mastodon.social avatar

"When people are treated unfairly, for example, when they are not allowed to have input into decisions that will affect them, or when they are not given good explanations of why certain decisions were made, the symbolic message may be that the organization does not think highly enough of them (to provide input or to be given good explanations)."

robryk,
@robryk@qoto.org avatar

@grimalkina

Do they mean peers you're likely to interact repeatedly with, like to interact exactly once with (because of organisational distance), or both? (I expect this to at least sometimes differ significantly between the two groups, because in exactly one case trust between two individuals can exist.)

futurebird, to random
@futurebird@sauropods.win avatar

Someone said it's important say this publicly in the US: so I will. (And I think each of us should, online and to friends)

This November I will vote for Biden.

I would regard not voting for Biden, particularly in: PA, OH, MI, WI, IN, IL,VA, GA, FL, AZ, ME, NC, NH, etc. as a huge error. I'd be disappointed to find out anyone I knew didn't vote. It's one of a long list of things we need to do. We can't skip it.

And still? We deserve better choices, and in the future we shall have them.

robryk,
@robryk@qoto.org avatar

@futurebird

What do you think about various vote swapping arrangements with voters from states that are closer to even than yours?

mwk, to random
@mwk@donotsta.re avatar

is a container with the right mixture of H₂ and O₂ a "force multiplier" for a spark? or is it a force unto itself?

robryk,
@robryk@qoto.org avatar

@mwk The multiplication factor will vary greatly over spark size, so it's kinda a stretch to call it a multiplier.

robryk, to random
@robryk@qoto.org avatar

The most recent #Sachgeschichte (about chains) claims that the cooling bath for hardening is water (it's surely oil: water would visibly boil and Leidenfrost effect would make cooling insufficient).

I've used WDR's contact form to tell them that and we'll see what happens.

robryk,
@robryk@qoto.org avatar

Or maybe I'm wrong, Leidenfrost causes it not to violently boil, and the colling is fast enough for their purposes?

TheBreadmonkey, to random
@TheBreadmonkey@beige.party avatar

For anyone on a diet; TIL there are 20 million calories in a gram of Uranium-235.

Best avoided, stick to lasagne.

robryk,
@robryk@qoto.org avatar

@TheBreadmonkey

Best stick to things around iron: ~everything below iron in atomic number can be fused. Things sufficiently above iron can be taken apart for energy (though sometimes we have found no way to catalyze that).

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