How Fractals Make the Best Coffee

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There is suprising physics involved in making the perfect coffee. Here's a math-free dive down the rabbit hole of how fractals make the best cup of coffee, and answering just what the heck is a renormalization group.
I am trying to aim for quality over quantity with these videos. If you want to support the channel consider checking out my patreon: patreon.com/NotDavid
#physics #coffee #stem #stemeducation #maths
Socials:
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Twitter - / davidnot7
Footnotes:
[1] 2:01 - More importantly its missing any concept of time. Fundamentally this doesn't change anything though but we will need to talk about this in a future video.
[2] 2:47 Link to code in github: github.com/notDavidsGit/perco...
please note im not a frequent user of github, if something doesn't work please let me know!
[3] 3:20 - An excelent reference for percolation on networks (which is a huge field in and of itself) is Mark Newmans Networks: An Introduction
[4] 6:53 - Here I make it sound like FSE are a problem we need to get rid of, but actually we can also exploit finite size effects to learn even more about the thing we are trying to study.
[5] 8:48 - In actuality there are a few factors working together and forest fires as a critical phenomena are a big area of research. For example, the density of the forest can also play a role.
[6] 11:22 - Here I call Renormalization Group theory 'simple' and ... yeah ... its not. Its probably one of the most difficult pieces of mathematics I've had to do so far. However, there are things about this particular example that make it simple. The hardest thing in RG theory is typically renormalizing things like energy, as it can accidentally become infinite (this is, as far as I know, the big problem of reconciling gravity and quantum theory). If you're familiar with partition functions then the issue can be rephrased as 'is the partition function self-similar under renormalization?'. However, here there is no associated energy and no partition function, so we really don't have to worry about that.
[7] 12:24 - I tried to rephrase this so many times and had trouble with it so apologies if you didn't get it. Essentially, imagine that we DIDN'T have those extra tiles flying in. Then, starting with a grid of 9x9, renormalzing it brings it down to 3x3, and then once more 1x1 and we are done. Thats 3 zoom out steps. Keep in mind in physics we are talking about renormalization from the size of atoms to the size of black holes, so we want a near infinite number of zoom out steps. So to keep the grid small enough for blender I just do the renormalization off screen and 'replenish' the grid. There is a little bit more to it than that but thats essentially it (for the physicists im recalculating the density from the renormalization flow and then drawing grids from the new probability).
CREDITS:
All animations, editing, scripting, story boarding are done by not David
MODELS:
Persona 4 TV world by bunnxarts
TUTORIAL SHOUT OUTS (youtube):
Black Hole Blender - Iridesium
Mandelbrot Fractal - Igot Zdrowowicz
Various Davinci Resolve things - Essential Video Editing
Various Geometry node things - Open Class
ADDITIONAL THANKS:
P. Freeman
J. McClean
ATLUS for making Persona and SMT
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Опубликовано:

19 янв 2023

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Комментарии : 361

@stevenvroom1041 Год назад

Yeah yeah, it's nice to know _why_ fractals make the best coffee, but... HOW DO I MAKE THE PERFECT FRACTAL COFFEE!?

@lonestarr1490 Месяц назад

Trial and error, unfortunately. The critical density doesn't guarantee you a balanced extraction. So you'll have to dial it in; there simply isn't any way around it. Here's how you do it: Brew a cup. If nothing goes through, grind coarser. Once you get coffee out, taste it. If it is sour, that means the water percolated too quickly and didn't have enough time to extract the sweet components to balance out the acidity. Hence, you need to grind finer for more resistance. If it is bitter, then you extracted too much and thus need to grind coarser. Rinse and repeat (literally) until you get something you're satisfied with. And when you buy different beans the whole process starts anew.

@gregothy9190 Месяц назад

@@lonestarr1490Also, with a professional machine, running two ounces through (double espresso) the classic metric is 26 seconds. Finer grinds go slower, coaser grinds go quicker. This "26-second rule" gives you an easy metric without necessarily needing to taste it all. With our professional machine, it actually times it, so you don't even need to have a timer. That said, some people like a 17 second shot with one bean, or a 30 second shot with another bean. All preferences :)

@notarealyoutubeaccount799 Год назад

Your channel is going to blow up like mad in the coming months. Absolutely fantastic job. This video was a pleasure to watch.

@not_David Год назад

Thanks so much, I'm glad you enjoyed the video :)

@simplykyle Год назад

It indeed blow up!

@abhyutaichou8322 Год назад

And the coming months is officially here. 10k subs under a week! 🎉

@viv3d Год назад

22k Sub Already! Amazing Channel

@notarealyoutubeaccount799 Год назад

And an extra 3k subs in 5 days. David keep going! 😤

@ck_cal Год назад

I don't think there has ever been a channel as underrated as yours The videos are incredibly aesthetically pleasing and every single render is on point, the explanations are elegant and simple and as a whole they just make you wanna keep watching! I truly believe the stuff you make is on a whole other level, keep going!

@not_David Год назад

This is one of those comments that really motivates me to keep working on videos even though its so time consuming. You made my day haha, thank you!

@Me-0063 Год назад

I completely agree. The videos have a very high quality, and I believe are on par with million subscriber channels

@pilkin5378 Год назад

another underated channel that springs to mind is 'lines in motion'. rly rly inciteful commentary about art in manga.

@not_David Год назад

@@pilkin5378 ooo right up my alley. Thanks for the recommendation!

@rapidfuryg592 Год назад

I completely agree.

@Annapaulas Год назад

I don't know how I found my way to your channel, but these videos are amazing! My dad asks me questions about my career (unrelated, but both mathematical), and has always told me I can't really fully understand what I do until I can explain it to him. I think this goes to show you understand your field completely, as you're able to break complicated topics down and relate them into easily understandable and interesting every day scenarios. You mentioned in another video about what your tutor may think about how you're applying your learning - I, for one, think your tutor should be very proud!

@not_David Год назад

I don't think I understand my field completely, but I do think your dad is very right, and honestly if I could go back and tell my undergrad self what to focus on, it'd be just that because so much of getting a career or grant writing is expressing why your work matters to a group of people that have no idea about physics. Part of making these videos is also for me just to learn to do just that. Thanks so much for the kind words!

@leftysheppey Год назад

Your dad is smart. You can't teach somebody if you don't truly understand. When I used to tutor maths, if I got the feeling the student knew how to do it, but needed practice, I'd make them explain it to me. 90% of the time, it's just confidence they were lacking

@parrotapocalypse Год назад

This was a great video; it's apparent how much effort goes into these. Please keep making them!

@not_David Год назад

Thanks so much, the kind words are greatly appreciated :)

@cqnrad Год назад

i watched two of your videos and then looked at your sub count. i legitimately expected you to have a million subscribers, this has to be one of the most underrated channels on youtube. crazy shit you're doing man keep it up

@hamelaman Год назад

so cool! well done! I would like more about the unrealistic societal expectations for fractals please

@jstrandquist Год назад

A few comments from a coffee-loving physicist: 1. The idea of fractals not strictly repeating as you zoom in or out but merely maintaining the same statistical density is interesting. I'm honestly surprised I hadn't heard about it before. 2. Scale effects are really important in physics-the most significant is probably the quantum-classical transition, in that the further you zoom out from the atomic scale, the less apparent quantum mechanical effects are and the more things behave according to the laws of classical physics. It's also hugely important in trying to describe phenomena such as ferromagnetism and material properties. I also had some personal experience with finite size effects when I worked on synthesizing semiconducting lead sulfide nanoparticles in undergrad. Their cool trick was that while they would absorb visible light and emit infrared as a bulk crystal, once you got them down to a few hundred atoms in size, they would start absorbing and emitting mostly in the visible range due to quantum confinement. 3. Regarding renormalization and gravity, the longstanding issue is that while we have a classical theory of fields that works really well (describing electric fields, gravitational fields, flow fields, etc.) *and* we have a quantum theory of fields that works really well (describing quantum electrodynamics and the nuclear forces), every quantum theory of gravity has proven unrenormalizable. Even worse, because gravity is by far the weakest of the fundamental forces, it's impossible with current technology to test gravitational effects at the quantum scale. (Note: I'm not a professional cosmologist or particle physicist, so I'm neither current with every development in the field, nor can I give much more detail than already given here.) 4. An interesting complication to your model would be to include a range of particle sizes. James Hoffman once put some ground coffee through a laser particle size analyzer, and the results for 3 grinders all showed a slightly skewed Gaussian distribution around 1 mm, along with a long tail rising slightly at 40 μm. 5. Other weird coffee physics topics include the production of foams. Espresso crema is the most well-known foam, but Turkish coffee also produces a foam, which consists of air and water vapor dispersed in a matrix of coffee oils, water, and suspended grounds. I don't actually know what causes it, so I'm starting a research project to figure it out. It's great to do experiments where you can drink the results. I hope you found some of that interesting; I certainly enjoyed your video. Thanks for making it, and best of luck getting your espresso technique down!

@not_David Год назад

Thanks so much for the comments! Regarding comment 1: A good reference for this would be the book by Christensen And Monloney. They give an excelent overview of the statistical definition of a fractal (e.g., their association with power-law distributions). I addmitedly don't know if this definition is or is not reconsilable with the "traditional" thing we think of when we think of fractal (e.g., mandelbrot, menger sponge, etc.) but I think it should be possible? Regarding comment 4: I did think about this and I think that a distribution of particle sizes wouldn't effect the overall conclusions. If we assume that each grind is impermeable (which is not a great assumption but I think my model implicitely makes) then a distribution of grain sizes would mainly indirectly effect the density. Thats completely conjecture though. I'm reminded of whats apperently called the brazil nut effect, where larger particles rise to the top because smaller particles fill the spaces below. I think it'd be a similar thing where larger particles interfacing with smaller particles would just change the density. Tangentially reagrding 5: In the original version of the script I had a section where I talked about how other coffees relate to this model, or more specifically how they don't. Turkish is actually probably my favourite type of coffee but it is not really modeled by this at all.

@jstrandquist Год назад

@@not_David Thanks for the thoughtful reply. I figured Turkish isn't modeled by this because instead of having a bed of compacted grounds with a fairly high coffee to water ratio, you have a slurry of grounds suspended in 10 times as much water. There I think you're dealing much more with convection currents and bubbles from heating the water, and the grounds are mostly just along for the ride. The other thing I forgot to mention that I was curious about is that your percolation probability vs. density graph around 7:28 looks a lot like the Fermi-Dirac distribution, which describes the average number of fermions (such as electrons) in a given energy state ε as a function of ε, the chemical potential μ, and the temperature T. The functional form is 1/exp((ε-μ)/Τ+1), and as T goes to 0 it looks more and more like a step function. I haven't really encountered it elsewheres. Do you know if there's a theoretical/mathematical connection to your model? Because that would be really cool.

@not_David Год назад

Interesting question... I'm not actually sure, I'd have to think of it some more... My first instinct would be that if there is a connection it would not be with percolation model itself but rather the Ising model. The ising model also has a phase transition when the external magnetic field is 0 (which is required otherwise it breaks symmetery) and T = T_c (the currie temperature). I think if you plotted the existinace of the order parameter (in this case the net magnetization) against the temperature, you would see the same plot for different grid sizes. The big stretch is making analogy between temperature (in the case of FD) and system size (in the case of percolation and ising model). Maybe the temperature (or more specifically \beta = 1/T) could be thought of some sort of abstract system size, and as \beta goes to infinity is similar to as if the grid size goes to infinity? This is all just early morning pre-coffee guessing by me though, I'd have to think about it, but its a good point, thanks for bringing it up!

@askyle Год назад

Since we're bringing James Hoffman into the equation 😁, I think it'd be interesting to consider channeling in the model (i.e. the formation of discrete "large" flow channels as opposed to an "even" percolation); he has demonstrated in several occasions (esp. reviews of subpar brewers) that the impact of channeling in extraction quality is definitely non-negligible. One thought would be to maybe consider the number of coffee-water interfaces in the grid, but then I don't know enough about RGT to tell how that would change the subsequent theory (since it's no longer a boolean condition like the existence/nonexistence of a percolation path) 🤔 (Note: I'm neither a physicist nor a barista and I haven't had coffee yet either so all of this may or not be nonsense 😅)

@not_David Год назад

Hope you enjoyed the video! (post-uhmms video edit) Looking back I have two critisims about this video: -the first is that it is not explicit enough in saying the video is not actually about practical applications of making coffee. I think this is one of those things that im still trying to get better at as a writer and was just a blind spot I missed. I am working on addressing this (I hope my uhmms video is better in this regard). - the second is much bigger in that i never explicitly say what the result is. Like its implied but i just kinda breeze past it. Namely, the result is that you would want to be as close to the fractal without going over it. Of course, this assumes you like a strong coffee. Anyway, I still think the video is good and im proud of it, but im definitly learning a lot from the feedback so thank you everyone!

@m9l0m6nmelkior7 Год назад

It's a really good and interesting one !

@not_David Год назад

Thank you! I'm glad you enjoyed it :)

@papycoima Год назад

you deserve a lot more subscribers, the study behind your videos and the dedication are just incredible. Keep it up!!

@pacificnorthwet Год назад

I really did! You explained the concept of percolation and critical density extremely well and I'm now very excited to find other applications. Thank you very much!

@tinycatzilla Год назад

I wish it was more in depth, but I liked it

@TheWizardGamez 9 месяцев назад

least insane coffee bro

@SupaMario1993 Год назад

How are you not one of the most well known science communicators on this platform? It's a terrific melange of informative and entertaining content explained in a easily accessible way. Thank you so much for your efforts. Looking forward to what this channel is going to become.

@holyfool343 Год назад

I just discovered your channel, and have to say that videos like this are *amazing*. I’ve long had a penchant for aggregating data that others haven’t and analyzing them in ways that others haven’t, to gain insight and, often, solutions to complex problems that wouldn’t have been possible otherwise. It’s wonderful to find others who take a similar approach, and present the process in such an intuitive manner.

@not_David Год назад

Thank you! I appriciate the kind words :)

@noahglimcher5445 Год назад

This was really a fantastic video, when I started watching your stuff I thought that you must have like a million subscribers or something. All of the effort that you put into your videos is really clear and I love the style. Excited to be in the first 15k when you blow up.

@defaultnano Месяц назад

love the subtle references! your humor and writing is on point!

@user-ed8dd7ye3w 10 месяцев назад

Your ability to take interesting science and math topics and apply them to more 'mundane' topics is really impressive and helps me grasp them more easily than I thought I would. Great video!

@Blubb_Strahl Год назад

You're doing some really awesome videos! Great science explained in a fun and easy way. Keep at it!

@laetitiaklinkhammer192 Год назад

wow, your channel is such a treasure! I'm usually not very big on maths and physics but your videos really change my perspective, they're really interesting and it's so cool too see how math applies in everyday life! the cherry on top for me is just the Persona 4 and Persona 5 references and visuals. i seriously couldn't ask for more from a channel, great work!

@not_David Год назад

Thank you! my goal is really to show people who aren't big into maths and physics that there is a lot of creativity in those fields even if thats not how it is usually taught, so your comment means a lot :)

@ThePrimevalVoid Год назад

An absolutely amazing introduction to the topic, thank you so much for making this!

@not_David Год назад

Thank you! It means a lot to hear that :)

@greatday19 Год назад

I just discovered your channel, this is my second video. I'm surprised the channel is so small! I love how you're able to take random, seemingly mundane topics of every day life and use it as a springboard for introducing a more generalizable scientific principle! I've done some math and physics tutoring and have come to appreciate that it is this exact curiosity, asking the seemingly mundane questions, that sparked my interest in STEM, yet it is something that most high schoolers unfortunately lose... So, having discovered a channel that brings back the fascination and curiosity in the everyday makes me really happy 😊

@not_David Год назад

Thanks so much! I take a lot of inspiration from the channel Technology Connections if you don't know it already. Alec is the king of making mundane every day objects fascinating (i particularly recommend his video on rice cookers).

@Diskowtek Год назад

Brilliant animations and explanations. Thank you!

@sush1alt Год назад

It's crazy that I was able to understand all of this complex topic that I have never even learned a thing about before just through this video! You have great teaching skills.

@1495978707 Год назад

Awesome shit man. Perhaps the best introduction to renormalization I’ve ever seen

@zyansheep Год назад

Persona 5 makes me feel nostalgic... never played it myself, but I watched the gameplay walkthough! Favorite persona song is "Road Less Taken" from Q2 :)

@not_David Год назад

I've had the side games like Q2 on my to-play list for such a long time but haven't had the time to get to them ... one day! I will listen to Road less taken though, my persona playlist needs more. For me it has to be P3's Memories of You or the opening to P3FES. Its such a jam.

@gradybeckett1777 Год назад

Really nice video. Not many people can draw you in with coffee and spring some RG theory when you're not looking! This picked up some of the stuff i learned in my degree, and brought a load of stuff together in an interesting way. There's a lot to enjoy about this video, 10/10

@KyleMielke Год назад

Why did it take me so long to get recommended this channel? I love how you leave this video open, pointing to they myriad potential applications

@LeoDaLionEdits Год назад

These videos are such hidden gems! Keep up the great work

@rinzhler6922 Год назад

Underrated channel, def deserve the top. Subbed ❣ Great content btw

@Ermude10 Год назад

This was such a well done video! And explained from such an interesting angle as well. And yes, as a former physics master student I can relate to just wanting to dig into some everyday thing and ending up at renormalization group theory. XD

@oceannuclear Год назад

This video felt like it was a lot of fun to make given the amount of jokes and puns in it! I've thoroughly enjoyed it as well as a viewer!

@not_David Год назад

the video making process has its ups and downs but its worth it for the nice comments like yours, thank you :)

@fireclub493 Год назад

Wow! What a pleasure to watch. Subscribed!

@kupa121 Год назад

Man, I love your videos, they really remind me of Vihart, I hope your channel is gonna blow up some day

@damianvandenhaak Год назад

I watched the latest one now this one and subbed. Please keep it up

@fortify505 Год назад

This the best physics-related coffee video I've ever seen, good job

@not_David Год назад

personally I think we need to start conceptually tying more things to coffee. Thank you!

@isobarkley Год назад

cant wait for the part two! great job, not david :)

@lucota90 Год назад

Awesome visualizations man! Keep it up!

@VaraNiN Год назад

How do you only have 20k subs?! This is some extremely high quality content!

@TranquilSeaOfMath Год назад

Nice discourse and idea connections. Great animation and editing. 🎞

@Entropy67 Год назад

This is the best explanation of fractals that I have ever seen, amazing job dude very underrated channel

@not_David Год назад

thank you! i was very happy with that video so I am glad it is getting some love now hah

@koktszfung Год назад

Just learned this in a statistical mechanics course. You explained it very well.

@microcolonel Год назад

Love the unironic use of the default font in Blender, it is kinda fun.

@gaurisingh8394 Год назад

Spellbound haha. Man, I just took a minute for myself after watching this. Incredibly well done, keep the excellent work coming in! On a different note, Logic at it's Limit: The Grelling-Nelson Paradox is another great video that may be up your alley

@not_David Год назад

haha thank you for the kind words! I briefly looked into the G-N paradox and it does sound like my thing, I'll have to check it out, thank you for the recommendation!

@1PercentPure 11 месяцев назад

What a great video. Thank you!

@martensamulowitz347 Год назад

the quality of these videos is off the charts

@heitortremor Год назад

Fantastic content. I'm glad RU-vid recommended this to me!

@not_David Год назад

I'm glad it did as well! Thank you, the kind words are greatly appreciated!

@SaulKohn Год назад

Incredible video! And incredible that this has fewer than 500 views, it deserves 500K!

@not_David Год назад

Thank you for the compliment :) I'm glad you enjoyed it!

@bruninho12321 Год назад

beautiful content. I give it 3 mo for this channel to triple its size! Good work

@markm0000 Год назад

I get it now. This makes sense why the ice cube doesn’t instantly turn into water once it warms up.

@AnHebrewChild 6 дней назад

Very good content. Subscribed.

@MemTMCR 9 месяцев назад

y'know... I have nothing to say, but commenting helps the algorithm. more people NEED to see this.

@joshwillson4129 Год назад

These videos are so good how do you not have 100k subs already.

@not_David Год назад

Honestly even the amount that I have now is overwhelming/hard to believe haha. Thank you tho :)

@joshwillson4129 Год назад

@@not_David What you need to do is market these videos. Maybe use streamers? Probably a good way to get a ton of impressions. I'm cheering for you dude. :)

@venskmo5704 15 дней назад

admittably i started watching for your varied and interesting motion graphics but now you have me interested in network science

@not_David 15 дней назад

my favourite type of comment, a genuine big thank you :)

@AmazingQuill 9 месяцев назад

You did an amazing job teaching a really important cool part of math. I've been listening to Choas by James Gleik which dives into how much fractals apear in this world and in science. Great video!

@not_David 9 месяцев назад

great book!

@AmazingQuill 9 месяцев назад

Do you have any other book suggestions in that genre always looking for a good read.@@not_David

@Ravikumar_Sharma Год назад

Very enjoyable presentation. Keep up the good work.

@not_David Год назад

Thank you :)

@DraconianEmpath Год назад

what a fun rabbit trail of math and life!

@phillipneal8194 Год назад

Excellent ! Thank you.

@Jax-ke6jf Год назад

This was so good thank you!

@whatplan4335 Год назад

6 seconds in and I already love the video. Persona >>>>>

@skilluber 9 месяцев назад

Wow simply stunning, you gotta be up there in no time man…

@stefanguiton Год назад

Great video!

@evan7721 Год назад

12:00 that process of normalizing and zooming out reminds me of when you're diagonalizing a matrix (say 4x4) and you break it up into clusters of smaller matricies to help you out, but in the opposite way-ish

@therandomoneyt8626 Год назад

Great video keep making them

@not_David Год назад

thank you! highly appriciated

@nyanbrox5418 Год назад

I remember doing a mathsy project at uni where we basically used the spread of a virus through a household, then sort of used recombination group theory (though I had no idea it was called that) to apply the same maths to a system of multiple houses, basically assuming there was a tipping point in each household where everyone gets infected, and this exact same thing happens for cities, and then countries, and that is how to beat plague inc I can't believe I didn't know about maths that was as important as this is until now

@not_David Год назад

ohh thats interesting, im gonna have to take a look at that. Thanks for sharing!

@jannesvanquaillie9151 Год назад

Wow man. No other words. Just great!! I would defenetly wach a follow up video, if the topic has enough interesting things for more.

@not_David Год назад

Oh definitely there is more. The bigger question is can I do it justice haha. Thank you though!

@iliapopov2219 Год назад

Unrealistic societal expectations for how fractals should like - best line in math RU-vid

@hamzamotara4304 Месяц назад

Nothing like a nice cuppa math and art to start the day.

@_XRMissie Год назад

12:24 "Showing everything everywhere all at once would be too intensive for my computer" Folks, I think he's hiding the bagel in his PC 👀 Kinda wild how fractals appear absolutely everywhere. Fascinating video!

@willd2609 Год назад

Great video! Also, this is fascinating: This video does what complexity science does, and says "Here is a complex phenomenon with lots of moving parts You guys would benefit from some PHYSICS!" And yes, there are some sort of interesting things that physics can tell us about coffee density. And some of those observations are shared with other phenomena elsewhere in the world. But for coffee, the "best"ness off the coffee comes from source, fermentation, labour conditions, roasting, logistics, and so many other things that are more "not math" than they are "math." And when you do math to that problem, you start to view the world as a "this would be better with math" problem. The primacy of math in the thought process diminishes all the other valid ways of knowing. This is how we get horrible social failures like Effective Altruism and Longtermism and all these other abhorrent ideas that cause huge issues. This was a fascinating video. I would love to see a "why complexity science might be a very bad idea" video. Much love.

@nyuh Год назад

wow this is mind blowing

@russmack11 Год назад

Subbed for the Tim Hor.. i mean diluted coffee joke 😆

@aritradas132 Год назад

Great video man

@not_David Год назад

Thanks a lot, I appriciate it!

@christernyqvist3116 Год назад

Very good!

@aksela6912 Месяц назад

To make a cup of coffee… you first have to invent renormalisation group theory.

@emadhedayati9995 Год назад

I really enjoy your content ❤🎉 As a Veritasium and 3blue1brown fan, I should say that your content, narrative, and animation is as perfect as theirs. Maybe only a better mic is needed 😅

@not_David Год назад

wow extremely high praise, thank you!

@eliascorrea8573 9 месяцев назад

Keep the jargon in some of the time, with your footnotes it's super easy to get

@CampingAvocado Год назад

wtf the qquality of these videos is off the charts holy crap

@santapacman Год назад

I'm leaving a comment because I want this to blow up, and get lots of publicity.

@abejar99 Год назад

Hey man great video, made me subscribe, I'd probably get a new mic though, it was a bit low on volume

@not_David Год назад

Thanks! Thats definitely the plan. I've been using a blue yeti but perhaps with this new support its time to look at upgrading.

@josephcaouette Год назад

Commenting because this channel is critically underrated.

@josephcaouette Год назад

Also, for proof that I subbed before 10k once you hit 1mil like a month from now LOL.

@danielrhouck Месяц назад

I would be quite interested in a follow-up. In particular I bet things get more interesting with the same example but 3d. Maybe the part about 50% being a repelling fixed point holds, but in 3d I’m pretty sure you get a percolating path before 50%.

@geromiuiboxz765 Год назад

🇨🇱 I have watched 1000's of YT, but normally don't subcribe☹️. Bad for me, I know. But your so very underrated channel made the excepion‼️ Congrats!! Subscribed!! Saludos de 🇨🇱

@not_David Год назад

high praise, thank you :)

@tristanwegner Год назад

This got more interesting as it went along

@lumotroph Год назад

Holy shit. What a video!

@Boy-os6zu Месяц назад

yes...I have fallen down the coffee fractal rabbit hole... This video actually came at the perfect time

@klamky Год назад

finally the optimal coffee recipe for my spherical cow to get her energised before her long shift in the frictionless plane

@alejrandom6592 24 дня назад

This is so cool

@amsie02 Год назад

great video

@kleinebre Год назад

Dure, you need a machine with an overpressure valve so that the coffee doesn't get too densely packed by the pressure.

@uumuu Год назад

great bg music choices

@not_David Год назад

great taste in bg music

@sanjana1172 8 месяцев назад

THIS WAS INSANELY GOOD HOLY SHIT

@redblacktech Год назад

You missed your chance to say "Critical Moistness" ha! Pardon the childishness but amazing video! I'm actually shocked at the definition of fractals that you just laid out. Not only that but you definitely frightened me about the implications of universality. Really cool.

@not_David Год назад

Not gonna lie at one point it was that but when it came to recording I couldn't bring myself to do it haha Admittedly I did kinda handwave the definition of fractal there but thats largely because I wanted to save it for the next video. The 3blue1brown video on the topic I think does it pretty but obviously I wanted to present it very differently and if I recall correctly he doesn't go into unversality. Thanks as always!

@domovoi_0 Год назад

U amazing. Love and blessings.

@Andrew-vj2ep Год назад

ooh ooh, freshly hot bowl Miso Soup has a great look !

@fluorina6355 Месяц назад

i love this channel and how you take a random Topic of normal Human life and make it sience

@ShaggyMonk Год назад

Thanks Olga!

@not_David Год назад

best comment

@ThatSkiFreak Год назад

How do you make the blender animations? I've made some myself but I was always just manually keyframing the position/rotation of individual objects which would be pretty painful for a lot of the animations in this video so I assume you know something I don't. cool vid btw

@not_David Год назад

Most of it is geometry nodes, though in a couple of places I use the python API as well if i need to calculate stuff between objects (like the RG theory section)

@salvador1683 Год назад

Pretty damn cool not gonna lie

@pafnutiytheartist Год назад

Very interesting. How doest it apply to practical coffe making though? I hoped for some sort of numerical result.

@arthuralonso25 Год назад

Me 2

@not_David Год назад

This is a good point. The thing is that the video was more intended as a way to teach phase transitions, fractals, and renormalization groups (which are important in physics but can be difficult to understand) by way of something reltable like coffee making. You could in theory (assuming it does indeed exist) find the critical density by doing successive measurements at various densities, but obviously this is not practicle (or cheap). The issue is that i didn't really make that intention obvious (i kinda assumed it was when clearly it was not). This is largely due to my inexperience with writing still but its something im trying to take into account as i keep making videos (i think and hope the uhmm video is evidence of that? maybe?)