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Simulating an epidemic


Эксперименты с SIR-моделью
Главная страница: www.3blue1brown.com
В создании ролика помогли Вы: 3b1b.co/sir-thanks

Моделирование Гарри Стивенсена в Washington Post:
www.washingtonpost.com/graphics/2020/world/corona-simulator/

Моделирование Кевина Симлера в Melting Asphalt:
meltingasphalt.com/interactive/outbreak/

Великолепная визуализация текущего распространения пандемии в каждой стране от Minutephysics и Атиша Батьи:
www.youtube.com/watch?v=54XLXg4fYsc

Если Вы хотите послушать сводку по COVID-19 от математика/эпидемиолога, то я нахожу очень полезной эту лекцию от MSRI:
youtu.be/MZ957qhzcjI

Марсель Салате об отслеживании контактов:
twitter.com/marcelsalathe/status/1242430736944201730

— Эти анимации в большей части сделаны с использованием manim, библиотеки-мешанины на Python с открытым исходным кодом: github.com/3b1b/manim

Исходный код этого видео можно посмотреть здесь: github.com/3b1b/manim/blob/shaders/from_3b1b/active/sir.py

Если Вы хотите её попробовать, я должен предупредить Вас, что это не самый задокументированный инструмент со своими причудами, которые можно было бы ожидать от библиотеки, которую кто-то написал только для себя.

Музыка в начале:
Candlepower от Chris Zabriskie лицензирована под Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Источник: chriszabriskie.com/divider/
Музыкант: chriszabriskie.com/

Остальная музыка от Vincent Rubinetti.
Скачать музыку на Bandcamp: vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown

Слушать музыку на Spotify:
open.spotify.com/album/1dVyjwS8FBqXhRunaG5W5u

Если вы хотите помочь с переводом субтитров или проверкой перевода, уже сделанного другими и ожидающего одобрения, нажмите на шестерёнку в видео, перейдите в «Субтитры», потом «Добавить субтитры». Я очень ценю тех, кто помогает с этим, так как это делает мои видео доступными многим людям.

— 3blue1brown — это канал об анимированной математике во всех смыслах этого слова. Как всегда, если Вы хотите оставаться в курсе новых видео, то подписывайтесь: 3b1b.co/subscribe

Различные соцсети:
Сайт: www.3blue1brown.com
Твиттер: twitter.com/3blue1brown
Реддит: www.reddit.com/r/3blue1brown
Инстаграм: www.instagram.com/3blue1brown_animations/
Патреон: patreon.com/3blue1brown
Фейсбук: www.facebook.com/3blue1brown

Fractals are typically not self-similar


An explanation of fractal dimension.
Home page: www.3blue1brown.com/
Brought to you by you: 3b1b.co/fractals-thanks
And by Affirm: www.affirm.com/careers

Music by Vince Rubinetti: soundcloud.com/vincerubinetti/riemann-zeta-function

One technical note: Its possible to have fractals with an integer dimension. The example to have in mind is some *very* rough curve, which just so happens to achieve roughness level exactly 2. Slightly rough might be around 1.1-dimension; quite rough could be 1.5; but a very rough curve could get up to 2.0 (or more). A classic example of this is the boundary of the Mandelbrot set. The Sierpinski pyramid also has dimension 2 (try computing it!).

The proper definition of a fractal, at least as Mandelbrot wrote it, is a shape whose «Hausdorff dimension» is greater than its «topological dimension». Hausdorff dimension is similar to the box-counting one I showed in this video, in some sense counting using balls instead of boxes, and it coincides with box-counting dimension in many cases. But its more general, at the cost of being a bit harder to describe.

Topological dimension is something thats always an integer, wherein (loosely speaking) curve-ish things are 1-dimensional, surface-ish things are two-dimensional, etc. For example, a Koch Curve has topological dimension 1, and Hausdorff dimension 1.262. A rough surface might have topological dimension 2, but fractal dimension 2.3. And if a curve with topological dimension 1 has a Hausdorff dimension that *happens* to be exactly 2, or 3, or 4, etc., it would be considered a fractal, even though its fractal dimension is an integer.

See Mandelbrots book «The Fractal Geometry of Nature» for the full details and more examples.

— 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 about new videos, subscribe, and click the bell to receive notifications (if youre into that).

If you are new to this channel and want to see more, a good place to start is this playlist: www.youtube.com/playlist?list=PLZHQObOWTQDPHP40bzkb0TKLRPwQGAoC-

Various social media stuffs:
Twitter: twitter.com/3Blue1Brown
Facebook: www.facebook.com/3blue1brown/
Reddit: www.reddit.com/r/3Blue1Brown

The Essence of How Bitcoin Works (Non-Technical)


A brief intro to the main ideas behind How Bitcoin Works, including how money is transferred, who keeps track of it, and how the whole thing is secured. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): app.pluralsight.com/library/courses/bitcoin-decentralized-technology
Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more.

1JoLcdC9CAYQ5T4QUARHfXQZyxQBBSFJu9

written script: www.imponderablethings.com/2014/09/the-essence-of-how-bitcoin-works-non.html

Blockchain Technology Explained (2 Hour Course)


Blockchain Technology Course will cover:
— Technology overview
— Blockchain evolution
— Decentralized web
— Distributed organizations
— Distributed ledger
— Smart contracts
— Distributed applications
— Internet of value
— Token economies

****

INTERESTED IN THE STOCK MARKET?
I developed a successful stock market trading model: yuriymatso.com/my-market-model/

Consensus Algorithms, Blockchain Technology and Bitcoin UCL - by Andreas M. Antonopoulos


An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, «Proof of Work», used by bitcoin and many other blockchains. Andreas is a UCL alum.

This talk was presented in collaboration with the Department of Computer Science at University College London.

If you want early-access to talks and a chance to participate in the monthly live Q

How the blockchain will radically transform the economy | Bettina Warburg


Say hello to the decentralized economy — the blockchain is about to change everything. In this lucid explainer of the complex (and confusing) technology, Bettina Warburg describes how the blockchain will eliminate the need for centralized institutions like banks or governments to facilitate trade, evolving age-old models of commerce and finance into something far more interesting: a distributed, transparent, autonomous system for exchanging value.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the worlds leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design — plus science, business, global issues, the arts and much more.
Find closed captions and translated subtitles in many languages at www.ted.com/translate

Follow TED news on Twitter: www.twitter.com/tednews
Like TED on Facebook: www.facebook.com/TED

Subscribe to our channel: www.youtube.com/user/TEDtalksDirector

How the blockchain is changing money and business | Don Tapscott


What is the blockchain? If you dont know, you should; if you do, chances are you still need some clarification on how it actually works. Don Tapscott is here to help, demystifying this world-changing, trust-building technology which, he says, represents nothing less than the second generation of the internet and holds the potential to transform money, business, government and society.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the worlds leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design — plus science, business, global issues, the arts and much more.
Find closed captions and translated subtitles in many languages at www.ted.com/translate

Follow TED news on Twitter: www.twitter.com/tednews
Like TED on Facebook: www.facebook.com/TED

Subscribe to our channel: www.youtube.com/user/TEDtalksDirector

Bitcoin - The End of Money As We Know It | Award-Winning


Whatever Bitcoin may be; most people do not yet understand what this controversial and influential innovation is about and how it works. This award-winning documentary answers these questions.

Bitcoin: The End Of Money As We Know It traces the history of money from the bartering societies of the ancient world to the trading floors of Wall St. The documentary exposes the practices of central banks and the dubious financial actors who brought the world to its knees in the last crisis. It highlights the Government influence on the money creation process and how it causes inflation. Moreover, this film explains how most money we use today is created out of thin air by banks when they create debt. Epic in scope, this film examines the patterns of technological innovation and questions everything you thought you knew about money. Is Bitcoin an alternative to national currencies backed by debt? Will Bitcoin and cryptocurrency spark a revolution in how we use money peer to peer? Is it a gift to criminals? Or is it the next bubble waiting to burst? If you trust in your money just as it is — this film has news for you.