OfCourseNot

joined 2 years ago
[–] OfCourseNot@fedia.io 7 points 6 months ago (2 children)

Why is the word Israel, consistently through the whole site, between quotes?

[–] OfCourseNot@fedia.io 1 points 6 months ago

That's an excellent question, and like most excellent questions I think the answer is 'it depends' but I would bet for 'yes'.

First, 'noise' is a part of the signal we don't want or we don't care about. In op's example they talk about 'two servers' one quieter and another louder. The sounds of these sources is the part of the signal we care about so the sound of the louder server isn't noise in any case. As long as the sound of the quieter server rises above the noise floor and the recording device have the dynamic range to record the sum of the sounds you should be able to 'measure' it (as in pointing to differences in the readings when you turn it on and off) and maybe cancel the other server to some extent by processing it.

Now to this point is a yes but 'it depends' because while the sound of the louder server isn't noise it can rise the noise floor depending on the acoustics of the server room. Some server rooms have lots of reverb and echo, specially when they're not very full, but in my experience most don't, many put these plastic curtains to contain the AC and they dampen sound reflections pretty effectively. But with bad enough acoustics, a very loud 'loud server', and a quite quiet 'quiet' one the sound floor could rise over the quieter server sound.

Disclaimer: this is from the top of my head, I'm tired and not a hundred percent sure this is correct. Don't take any important decisions based in my autistic rambling.

[–] OfCourseNot@fedia.io 6 points 6 months ago (2 children)

Others have commented on the physical process of interference, waves add up but also cancel out. But the server sound 'disapeaearing' is not caused by interference, in fact it doesn't disappear at all. It's a phenomenon called 'masking' caused by your auditory perception. Louder or lower sounds mask quieter or higher pitched sounds.

Edit: and to add a bit to the answers, natural sound sources add up more than they cancel out on average, so it will get louder the more sources you add. But sound pressure level is also inversely proportional to the squared distance, so there's a limit to the max db you can get just adding more similar sources, with a higher limit with higher source density, ie the closer to each other you put them. I leave the formula for this as an exercise for the reader.

[–] OfCourseNot@fedia.io 3 points 6 months ago

Yep I know. These are the ones the company buys. I've tried others when I had to buy a box while out and about but n a hardware store or even a supermarket. Latex gets destroyed very fast, I didn't notice much of a difference with vinyl.. but you are right I have to try if some other material goes better. The thing is I don't have a clue what the fuck they put in the inks and nobody seems to be able to tell me.

[–] OfCourseNot@fedia.io 1 points 6 months ago

I sincerely doubt these newcomers can achieve at their first try what well established manufacturers haven't through revision after revision of their machines. The price is the first clue, flatbed uv printers this size start at about ten thousand. Also, important information like which printhead they mount, printing speed (m2/h), uv lamp wattage.. is missing which is suspicious at best.

[–] OfCourseNot@fedia.io 0 points 6 months ago

Not at all like a resin printer. Imagine a hybrid: the top part is an inkjet printer with a printhead that goes side-to-side shooting ink but instead of paper sliding under it there's a flatbed not unlike the one in a filament 3D printer. The ink is cured by a uv lamp (or more than one, but I suspect this printer has only one and very small and weak since the smaller lamp I work with costs more than this hole printer) usually fixed to the side of the printhead 'carriage'.

[–] OfCourseNot@fedia.io 29 points 6 months ago (4 children)

No. Just don't! You nerds, tinkerers, hackers, makers... listen to me: DO NOT BUY THIS.

I didn't think I'd have to read the words 'Consumer UV printer' ever. It's just a deranged concept. UV printers are the worst kind of machines there are. Imagine an inkjet printer but a thousand times worse, I'm not joking. I work with these, but professional/industrial ones, in professional printshops, and they are an absolute toothache for my customers (again, professionals that make a living with printers and similar equipment). The customers like me, because I'm the one solving them problems (even if the bill for the solutions is more often than not a few thousands) but I'm sure the salespeople look under their cars every morning.

This will only be a hole in your pocket, a piece of junk taking up space in your home, and even a hazard to your health or your kids' or pets'–UV ink is some nasty shit before curing, some of them make my hands itch even trough the nitrile gloves, and you have to handle and dispose of the waste ink properly ie hiring some waste management service.

It's true that you can make beautiful things with them, but for a home it's just not worth it, just take your designs and your media (the things you want to print on) to a print shop and have them printed there.

[–] OfCourseNot@fedia.io 2 points 6 months ago (1 children)

You are right, it was an oversimplification, 25% is hardly a 'rare exception'.

In my defense I have to say that it was late, I was already in bed, and very sleepy. And I knew that, this being lemmy, some other nerd would come with a more thorough explanation.

[–] OfCourseNot@fedia.io 3 points 6 months ago

That's the one.

[–] OfCourseNot@fedia.io 2 points 6 months ago (6 children)

Nope, that's an orange/red tabby while op's is a calico, which is also present in Minecraft. Fun fact: except in rare exceptions all red tabbies are males and all calicos are female.

Note: these aren't breeds, but names for the coat coloring.

[–] OfCourseNot@fedia.io 1 points 6 months ago

The installation in my home follows my country's regulations as they were ~15 years ago. It's divided into several circuits, the 'general use' outlets one is rated for 25A in total AND at any point, ie you could plug a 5750W appliance in any of those outlets. The lights circuit is the lowest rated at 15A, still letting you 'plug' up to 3450W.

[–] OfCourseNot@fedia.io 9 points 6 months ago (1 children)

Remember when Trump first got elected and ~~Anonymous~~ absolutely everything just suddenly vanished?

Now it's only Trump this, trump that... all the time, your comment as an example, so if he didn't say anything about anonymous then no one has heard anything about them.

view more: ‹ prev next ›