Recent comments in /f/explainlikeimfive

rysworld t1_j21dbyy wrote

You have a couple of recent posts which are of a much more rambly and long bent than your usual style, with a different tone to the writing and less capitalization and grammar errors. Have you been using AI to write your recent posts? Please don't do that on a place where people are trying to get actual answers like ELI5.

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ocelot08 t1_j21buey wrote

Ah interesting. I mean it's not gonna be much help, but I would basically just create a color palette in some Adobe program and then match pantone swatches to it. As it sounds like you've seen, color theory can get really complicated.

A nice tool is Adobe color. It won't give you a set of 12 but it could make for some good starting points as they have a number or ways to use different colors and push and pull them together as a set.

Anyways, good luck!

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Fred2718 t1_j21b6p0 wrote

Here are a couple of techniques which may not be in use anymore.

"Rook move encoding" for outlines of shapes, in particular digitized text characters. Instead of recording all the black and white pixels inside the character's body, record the outline of the character, in xy pixel space, as if you were moving a chess rook. E.g. 5 up, 2 left, 4 up, 3 left, ..... I worked with laser printers which did this.

"Patchified memory". Instead of treating a page as a set of raster lines, treat it as a set of small squares, like a quilt. Printed pages of text + black/white graphics tend to have lots of such patches which are all-white or all-black. Those patches can be represented in a very compact way.

These techniques are mathematically unsophisticated, but are easy to understand. Oh, also, they are both "lossless".

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This_Werewolf_2391 t1_j217thp wrote

Three laws of thermodynamics:

1st Law of Thermodynamics - Energy cannot be created or destroyed. 2nd Law of Thermodynamics - For a spontaneous process, the entropy of the universe increases. 3rd Law of Thermodynamics - A perfect crystal at zero Kelvin has zero entropy.

You grow on these laws to understand how energy exists and changes in forms of heat, motion, chemical potential, and pressure. Understanding these three laws allows you to explore subjects of like physics, heat transfer, physical chemistry, fluid mechanics and so much more. Thermo can be used to create new processes and debunk inachievable ideas.

As a chemical engineer it’s the most useful class I took. It made me see the world with a different perspective!

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explainlikeimfive-ModTeam t1_j215s2f wrote

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Future_Club1171 t1_j214zy7 wrote

I mean just like imperial, the units are based on SI which is mostly metric. Anything SI with distance can and is defined in meters. It’s just that using meters to convey such quickly gets messy since the universe isn’t going to make everything near round numbers. To give you a fermi approx of an AU, light takes 498 seconds to reach earth, light travels at 2.998x10^8 meters/second, therefore 1 AU is approximately 1.5x10^11 meters, that’s 150 gigameters, note the earth is only 40 mega meters even by the original meter definition.

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The_camperdave t1_j214xqn wrote

> County, not country.

Ah! Gotcha. I guess I had a leftover R from last talk-like-a-pirate day, and it chose this moment to escape.

Yes, counties and municipalities can have bylaws banning wood burning, especially in hot, dry seasons and in dense sub-divisions. OP will have to consult his local town council (or equivalent) to get an explanation - probably an anti-nuisance bylaw, though.

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plaid_rabbit t1_j214ece wrote

In the file, it stores "This item is pantone-1234", and lets the software using the file figure out what to do with it. So when it's rendered to screen, it uses a lookup to pick a good RGB color. When it's printed in CMYK it uses another. When you check it against what light it reflects, that's it's own set of rules about what it's "supposed to" look like. Fancy industrial printers have the ability to load specific inks for specific colors. So a press might support 4 colors, which you normally load CMYK. But let's say you're making a bunch of pamphlets for one company, which is black and white, but they want their logo on each page. You can load Black, and 3 other customs colors in instead. Some machines support something like 8 colors, just for this reason. Sometimes you need to load white ink because your printing on non-white materials. CMYK is just the most basic way of printing color.

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dperry1973 t1_j212ojk wrote

Any commercial printing press will have capacity for CMYK ink plus multiple Pantone inks. A machine called a raster image processor reads say a PDF and generates individual printing plates for every color specified by the designer/client. A designer will apply Pantone color stickers to the ink jet or laser printout that the designer sends along with the digital file so that the print shop can prepare the printing plates and Pantone inks for the job. A machine like the automated paint mixers in a hardware store are used to mix up Pantone inks that a print shop doesn’t have on hand. There’s obviously an upcharge for custom inks which the cost is tacked into the bill. Clients will fire a designer for allowing the wrong Pantone colors to go to press. If a Pantone code is in the specification doc isn’t used by the print shop, the print shop will eat the cost of the mistake. There’s a “nobody got fired for choosing Pantone colors when it matters” mentality amongst designers and printers.

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csl512 t1_j212eht wrote

Nope. Spectral colors are those made by pure wavelengths: https://en.wikipedia.org/wiki/Spectral_color

In the chart in that page, there's a horseshoe shaped curve with numbers between 300 and 700. Those correspond to wavelengths. Anything not on that line cannot be made with just a single wavelength.

Color science is super weird and unintuitive, and relies very heavily on the human perception of it, which involves cone receptors tuned to different ranges of light, approximately but not exactly red green and blue.

If you really want to get confused, https://www.reddit.com/r/philosophy/comments/18rbn2/is_your_red_the_same_as_my_red/

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wappledilly t1_j2113qg wrote

Many ports are reserved for common functions (22 and 53 are always ssh and dns), but many are used for different things altogether (8080 for instance can be used for many different services across many different vendors/developers).

IANA maintains the list of reserved ports when dealing with internet, and can be found at their website (along with other lists such as top level domains, IP address allocation, etc.) https://iana.org/

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interwebz_2021 t1_j210zsg wrote

Excellent description. I often use the metaphor of an apartment building's mailboxes with "the internet" (really, the network elements, obv) being the postal service, the building being the IP address and the mailboxes being the ports, mapped to services/programs. So far, it's worked pretty well. This also lets me extend the discussion to TCP vs UDP, where I compare UDP to simply mailing a letter and TCP to requiring a signature verifying receipt.

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bbqroast t1_j210p6p wrote

Applications that are waiting for anyone to mail them (i.e. server apps) need to "bind" a port and listen for traffic.

They generally do this on a specific port, this is so applications that want to talk to them can find them.

Applications that just want to start a chat with someone (i.e. client apps) can use a random one of the temporary ports as a return address for the duration of the correspondence.

If they use a port outside that range, then potentially they might prevent one of the applications that needs to listen to a specific port from starting (only one app can use a port at once). Likewise, if you decide to use a specific port in the temporary range, you run the risk it's randomly in use by someone else

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86tuning t1_j210cor wrote

this is perhaps the best analogy so far.

the body naturally converts energy to fat for storage. some body fat is necessary to stay healthy, the bodybuilders that cut to 1% for competitions don't look like that year round, it's actually not healthy to be at that percentage at all. that said, less than .0001% of the population can do this, which means we are not in danger of this at all.

the opposite is also true. excess body fat leads to all sorts of health problems.

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interwebz_2021 t1_j210clo wrote

>socket

Just in case anyone's not seen the term 'socket' before: this is a logical address comprised of the IP address and port. So, for instance, if you have a web server listening on port 80 on your local loopback interface with IP address 127.0.0.1, you can connect to the webserver via the socket with address 127.0.0.1:80

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