https://www.youtube.com/embed/Kas0tIxDvrg

A good time for a primer on exponential and logistic growth, no?
Home page: https://www.3blue1brown.com
Brought to you by you: http://3b1b.co/covid-thanks

Data source: https://www.worldometers.info/coronavirus/coronavirus-cases/#total-cases

Some have (quite rightfully) commented on how you shouldn’t look at the R^2 of linear regressions on cumulative data since even if the changes from one day to the next are completely random, the totals they add up to wouldn’t be independent of each other. Since the derivative of an exponential should also be an exponential, we could instead run the same test on the logarithms of the differences from day to day, which in this case gives R^2 = 0.91.

While this video uses COVID-19 as a motivating example, the main goal is simply a math lesson on exponentials and logistic curves. If you’re looking for a video more focused on COVID-19 itself, I’d recommend taking a look at this one from Osmosis: https://youtu.be/cFB_C2ieW5I

Extrapolation xkcd: https://xkcd.com/605/

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These animations are largely made using manim, a scrappy open source python library: https://github.com/3b1b/manim

If you want to check it out, I feel compelled to warn you that it’s not the most well-documented tool, and it has many other quirks you might expect in a library someone wrote with only their own use in mind.

Music by Vincent Rubinetti.
Download the music on Bandcamp:
https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown

Stream the music on Spotify:

If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then „add subtitles/cc“. I really appreciate those who do this, as it helps make the lessons accessible to more people.

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3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe: http://3b1b.co/subscribe

Various social media stuffs:
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https://www.youtube.com/embed/axMLZZNINCU

Highlights of Ali during his prime years. This was before getting his license stripped prior to fighting Joe Frazier. Many consider Ali in these years to be the best fighter ever.

Subscribe to see more of my boxing videos!

Song:
Ludovico Einaudi – Experience (Starkey Remix)

https://www.youtube.com/embed/FwRFH7MH5N0

Primitive Technology: Fired Clay Bricks – Creating fired clay bricks from scratch.
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More videos, watch me build a grass thatch, mud hut: https://youtube.com/watch?v=Ka2Eu6LxAKo&list=PLGnWLXjIDnpBR4xqf3FO-xFFwE-ucq4Fj

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About This Video:
I made some fired clay bricks as an experiment to see if I could make a permanent, waterproof, building material. A brick mold was fashioned from clay and then fired in existing kiln. This was then used to make bricks formed from clay from the creek bank. These bricks were then stored in the hut I built last episode to dry. Using half the hut I could fit 40 bricks. These, when semi dry, were then stacked around the fire to dry out. A small kiln was then assembled from un-fired bricks and used to fire 4 bricks as an experiment. It was about 50 cm tall and 25 cm square in cross section. The fired clay bricks were water resistant, they didn’t dissolve when submerged in water.
I will use these bricks to make a larger kiln and hopefully larger huts later on. I estimate that a kiln with a 50 cm cube ware chamber could hold 40 bricks without being so cramped the flames can’t get through. The good thing about using bricks to make kilns is that they can be constructed quickly without waiting for the layers to dry, they only crack along the joints between bricks while remaining structurally stable, they can be disassembled and built elsewhere or they can be reconfigured/enlarged to make different types of kilns. Repairs are also possible too.

About Primitive Technology:
Primitive technology is a hobby where you build things in the wild completely from scratch using no modern tools or materials. These are the strict rules: If you want a fire, use a fire stick – An axe, pick up a stone and shape it – A hut, build one from trees, mud, rocks etc. The challenge is seeing how far you can go without utilizing modern technology. I do not live in the wild, but enjoy building shelter, tools, and more, only utilizing natural materials. To find specific videos, visit my playlist tab for building videos focused on pyrotechnology, shelter, weapons, food & agriculture, tools & machines, and weaving & fiber.

https://www.youtube.com/embed/jxMMtIxDrGk

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Bryan Bonahoom talks about the LEGO Great Ball Contraption Rube Goldberg Machine at BrickFair Alabama 2016.

This GBC is made up of 59 individual modules. How does a GBC work? WATCH: https://youtu.be/U4v-qS7Wd0s

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Intro animation by HJ Media Studios: http://goo.gl/gRK8WJ

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https://www.youtube.com/embed/aQONtYjDlMw

© Artur Sarkisyan – Sochi Olimpic Sky 2015
С этой камеры велась прямая трансляция на шоу „ОЛИМПИЙСКОЕ НЕБО“ в Сочи 30-31 мая 2015г.
СВЕТЛАНА КАПАНИНА:
*Абсолютная чемпионка мира среди женщин (1996, 1998, 2001, 2003, 2005, 2007, 2011)[9].
*Абсолютная чемпионка Всемирных воздушных Игр среди женщин (1997, 2001).
*Абсолютная чемпионка России среди женщин (1991, 2001).
*Чемпионка СССР по высшему пилотажу (1991).
*Абсолютная чемпионка Европы среди женщин (1997, 2006, 2014).
*Тридцативосьмикратная чемпионка мира в отдельных видах программы среди женщин (1996, 1998, 2000, 2001, 2003, 2005, 2007, 2009, 2011, 2013).
*Восьмикратная Чемпионка Всемирных воздушных игр (1997, 2001).
*Семнадцатикратная Чемпионка Европы (1997, 2006, 2014).
*Обладатель 67 золотых, 22 серебряных, 12 бронзовых медалей чемпионатов Мира, Европы и Гран-При ФАИ.
Светлана завоёвывала награды чаще, чем кто-либо из коллег. Также, она была лучшей среди женщин на Всемирных Авиационных Играх 2001 — абсолютный чемпион среди женщин в 1997 и 2001 гг.
***
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Svetlana Kapanina – Sochi „Olympic Sky 2015“ by Artur Sarkisyan is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Permissions beyond the scope of this license may be available at https://www.youtube.com/user/ArturSarkisyan326.