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Oleg Osipovich
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Oleg Osipovich

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This is the most astonishing martial-arts video I have ever seen.

Stuff you had no idea was even possible ... and he makes it look easy.
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Hack your way to the Galaxy... #DontPanic Online Coding Contest - Saturday, October 25th http://ow.ly/D3dFu
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haskell.org now has a blog.
Hello there! What you're reading is a blog post. Where is it from? It's from https://blog.haskell.org. What's it doing? It's cataloging the thoughts of the people who run Haskell.org. That's right. This is our new adventure in communicating with you. We wanted some place to put more long-form ...
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Advanced video stabilisation.
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"I’m pleased to announce we are releasing our full FP Haskell Center (FPHC) free for developers of open projects." -- Aaron Contorer
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“The United States government can’t simply run an anonymity system for everybody and then use it themselves only. Because then every time a connection came from it people would say, “Oh, it’s anoth...
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Oleg Osipovich

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A free online course on chaos theory

Chaos theory is the study of physical systems whose motion depends very delicately on how they start out.  There's a lot of deep geometry here, and +Predrag Cvitanović has started a free online course on the subject!   

There's a lot of hype about chaos theory, but Predrag is a good physicist, and he's written a good free textbook on the subject, so this is the real deal.

To register, just go to his webpage here.  The course started a week ago but you can still join in.  It lasts 8 weeks.  It'll use his book, links to explanatory videos, and weekly homework assignments, which include some computer programming. For the assignments you can use any computational tools you want, but he'll provide you with stuff written in Python.  There are no tests.

He encourages you to register even if you won't do the homework: you can talk to other students on the course forum.  

Some administrators from his university tried to shut this course down at the last minute, probably because it's free.  I'm glad he fought them off and prevailed.  

This course is called Nonlinear dynamics 1: Geometry of chaos, and here are the topics:

Topology of flows - how to enumerate orbits, Smale horseshoes
Quantitative dynamics - periodic orbits, local stability
The role of symmetries in dynamics

There will also be a second, more advance 8-week course called Nonlinear dynamics 2: Chaos rules, with these topics:

Transfer operators - statistical distributions in dynamics
Spectroscopy of chaotic systems
Dynamical zeta functions
Dynamical theory of turbulence

The prerequisites for this first course are a basic background in linear algebra, calculus, ordinary differential equations, probability theory, classical mechanics, and statistical mechanics.  You'll need to able to work with equations involving vectors and matrices, differentiate simple functions, and understand what a probability distribution is.   You will learn to write programs in Python. 
Nonlinear Dynamics 1: Geometry of Chaos is a free online class taught by Predrag Cvitanović of Georgia Institute of Technology
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Nifty papers I wrote that nobody knows about (Part 4: Complex Langevin equation)
This is the last installment of the "Nifty Papers" series. Here are the links to Part1 , Part2 , and Part 3 . For those outside the computational physics community, the following words don't mean anything:  " The Sign Problem " For those others that have en...
This is the last installment of the "Nifty Papers" series. Here are the links to Part1, Part2, and Part 3. For those outside the computational physics community, the following words don't mean anything:  "The Sign Problem"...
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Таймлапс Пхеньяна
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You've seen the Apollo 11 Saturn V launch. But probably not at 500 frames/sec, with commentary.

This is fabulous, and not just because there's fire and steam and hellishly incomprehensible forces. Although that helps. It's also, you know, science. And history. It's the very first step in a journey that would land two human beings on a body that's more than a light-second away from Earth, and return them safely.

With fire. And steam. And hellishly incomprehensible forces.
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Have him in circles
76 people
Aleksei Smolin's profile photo
Alex Bennée's profile photo
Francisco Carrizales's profile photo
Eileen J. Winkler's profile photo
Jagadish T's profile photo
Aliaksandr Vinichuk's profile photo
Henk Krauss's profile photo
Dmitry Spodarets's profile photo
Alexander Zhigulich's profile photo
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The one that is good with the rocket launcher.
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