Skip Navigation

InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)C

Contramuffin

@ Contramuffin @lemmy.world

10
1029
3 yr. ago

  • Marx would use MY distro!

  • In addition to the other comment, a lot of companies typically sell support for their software, not the software itself. That counts for a lot in the business world

  • Behold the future of programming

  • Sewing/designing clothes really clicked for me. Haven't tried woodworking, but I imagine it scratches the same itch and utilizes similar skills: 90% of sewing is just planning, calculation, and measuring. Then, watch everything just fit together into place

  • Managers and bosses who have been told by employees that you are a good leader, what do you different?

  • Not top brass, but I've been in/am in mentorship roles. Not leadership in the strictest sense of the word, but I might as well pitch in. I think a big factor in what makes or breaks a good mentor/mentee relationship is acknowledging that your mentees have different goals than you. You may want a project to finish on time, but not everyone does. You need to cater to your mentees to make sure they're getting what they want out of the relationship - you're kind of working for them just as much as they're working for you. It's a lot of work to be a mentor

  • Gotta keep up with the meta

  • My understanding (not a historian, don't quote me on this) is that one of the big explanations for the collapse was particularly bad famine that affected the entire region. It led rural people to migrate into relatively-more-prosperous cities, often by boat (hence "sea people"), but this migration led to increased strain on city infrastructure, especially since the cities were facing the famine as well.

  • Copper

  • Ea-nasir promised that these were good quality copper, and I do not have any reason to suspect otherwise. But I'll have you know, if the copper is of inferior quality, I will make sure to send my messenger to complain. He will not hear the end of it!

  • Copper

  • Python

  • Copper

  • Good question. I had to modify my code to run more efficiently, since not throttling implies that the copper block reaches a steady state with very little temperature changes over time.

    But, with the changes, I can say that there is no copper block length that would prevent throttling with a 120 W CPU. It seems the heat transfer within the block is slow enough over such long lengths that you get diminishing returns with longer and longer copper blocks. Here's a graph I made summarizing the different block lengths that I tested

    With a 65 W CPU, a 32 cm (double the original length) copper block is sufficient to prevent throttling, but it'll reach steady state at 97 C

  • Copper

  • See, I thought about doing that, but then I realized: I don't actually want to do that

  • Copper

  • Copper conductivity is fast, sure, but it's not fast enough to have equal temperatures at the top and bottom for such a big chunk of copper. That does affect the time to thermal throttle pretty significantly, actually. If we assume completely homogeneous temperatures across the block (ie, instantaneous heat transfer), according to my model, it'll take 703 seconds to thermal throttle. With heat transfer, the time drops to 592 seconds - a difference of about 2 minutes

  • Copper

  • Was intrigued, so made a simulation to figure it out.

    TLDR: 592.2 seconds, or 9 minutes and 52.2 seconds. Very similar to the other comment - it appears temperature differentials and heat loss to the air have opposite effects on thermal throttle time and mostly cancel themselves out. For the most part, heat transfer and heat loss appear to affect the thermal throttle time less than the sheer heat mass of the block by several multiples

    Assumptions:

    • Copper's heat conductivity is 400 W/m-K, and specific heat is 0.4 J/g-K, and density is 9000 kg/m^3, and these values do not change over the range of temperatures
    • Air's heat transfer coefficient is 20 W/m^2-K and does not change over the range of temperatures
    • The surrounding air does not change in temperature and remains at room temperature (25 C)
    • The input wattage is actually 120 W and not just random marketing bullshit
    • The copper block's size is 4 cm x 4 cm x 16 cm (same as other comment)
    • The temperature within the copper block differs only by the vertical axis; it is assumed that temperature does not change if you move horizontally into the block

    Modeling conditions:

    • The block is sliced into 100 equally-sized slices, stacked vertically.
    • Each slice starts off with a temperature of 25 C
    • 120 W is input directly into the bottom slice
    • Heat transfer is modeled between each slice
    • Heat loss into the air is modeled for each slice (top slice has more heat loss due to more contact with the air)
    • Temperature changes are calculated per millisecond
    • Final time is calculated by the total number of milliseconds it takes for the bottom slice to reach a temperature greater than 100 C

    Fun facts I found from playing around with the model:

    • According to this model, at the time that the CPU thermal throttles, the top of the block should be 85 C
    • If we assume instantaneous heat transfer, time to thermal throttle goes up to 703 seconds (11 minutes and 43 seconds). Difference is about 2 minutes.
    • If we assume no heat loss to the air, time to thermal throttle goes down to 500.0 seconds (8 minutes and 20 seconds). Difference is about 1.5 minutes.
    • The copper block should be able to prevent throttling as long as the CPU remains idle (30W for AMD CPU's). The CPU should cap out at around 82-83 C.
    • The copper block can prevent thermal throttling for a 170 W CPU for 368.1 seconds, or 6 minutes and 8.1 seconds

  • Roses

  • You're confusing 2 different but related concepts. Blueshift and redshift does depends only on velocity. In the cosmological sense, redshift (the opposite of blueshift) occurs because everything is moving away from everything else due to the expansion of the universe, and so the distance of an object can be calculated based on how much redshift there is in the light. Basically, on a cosmological scale, distance and velocity are connected

  • Copper

  • Hmm, I think at minimum calculus will need to be involved here. Because we can't just assume that the heat is spread evenly in the copper - it'll likely be hotter at the bottom, leading to thermal throttling earlier than expected. On the other hand, there's going to be heat dissipation into the air, which will help cool the block somewhat

    Edit: made a program to model heat transfer and heat loss. It seems to only affect final time by a handful of seconds. So actual time in real life is probably somewhere in the ballpark of 10 minutes

  • The dangers of monogamy

  • I actually thought this was a god tier shitpost until I realized this is unironic

  • Would you accept purple carrots?

  • Purple carrots have a better taste, in my opinion. Not perfectly interchangeable with the standard orange ones, so having the option for both would be nice

  • That's some mighty fine lanes you got there!

  • That's just how ERK looks like. It's 44 kDa and 42 kDa, which makes it so that you either see 2 bands, or, more likely, you get 1 big fuzzy band

  • Statisticians, is this true?

  • Stats is technically math but it's the softest math you can imagine. A huge amount of it is data collection and interpretation. It works different parts of your brain, requires different skills than pure math

  • Had a dream last night where I discovered a secret North American dependent territory called "St. Lucia's Canadien Island", and this was the flag that territory had:

  • Ok but that flag is actually better than some (a lot) of US state flags

  • The Fediverse's Censorship Problem is Worse Than Reddit's

  • I'm not going to comment on whether it was right to be banned, but I will point out that there's a certain irony in you using AI to write a post in which you say people are complaining about your AI usage

  • Don't you even know dignity when you see it?!

  • I have no idea what this is. Could someone explain?

  • Thomas the Plank Engine @lemmy.blahaj.zone
    Contramuffin @lemmy.world

    Porridge Toast – A Recipe Literally From a Weird Dream I Had

  • Science Memes @mander.xyz
    Contramuffin @lemmy.world

    This bad boy here can fit so many still-adhered cells in it

  • Science Memes @mander.xyz
    Contramuffin @lemmy.world

    Make sure to put it back once you're done using it

  • Showerthoughts @lemmy.world
    Contramuffin @lemmy.world

    The Rapture could have happened, but nobody would know because everyone got left behind

  • Science Memes @mander.xyz
    Contramuffin @lemmy.world

    Inspired by another post

  • Request a subreddit @lemmit.online
    Contramuffin @lemmy.world

    r/notkenm

  • Request a subreddit @lemmit.online
    Contramuffin @lemmy.world

    r/kenm

  • Request a subreddit @lemmit.online
    Contramuffin @lemmy.world

    r/inceltear

  • Request a subreddit @lemmit.online
    Contramuffin @lemmy.world

    r/inceltears

  • Request a subreddit @lemmit.online
    Contramuffin @lemmy.world

    r/engineeringporn