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Jogging Helps Thinking

In The Guardian:

"Scientists speak of "transient hypofrontality": a state-of-mind promoted by pursuits that require physical exertion but little thought or concentration. The parts of the brain that coordinate general concepts and rules are turned down, while the motor and sensory parts are turned up. In this state, ideas and impressions mingle more freely. Unusual and unexpected thoughts arise."


Holy Curiosity

"Be a loner. That gives you time to wonder, to search for the truth. Have holy curiosity. Make your life worth living."
                                                                                                                                                                - Albert Einstein

Theoretical Aerodynamic Lift

I learned how to calculate aerodynamic lift and drag from Chapter 7 of Frank White's book, using experimental curves. Now I'm eagerly waiting to learn how to theoretically calculate lift on a moving object with a known shape geometry. It seems the author is as impatient as I'm to get there. This is going to be a very exciting subject, and more calculation power in my mathematical tool box!

An Infinite Row of Vortices

More Bullshit!

The bullshit theory again:


The real purpose of doing physics is to fit all we know about the physical world into a set of equations in our observable four dimensional space. Add more dimensions and you enter the world of metaphysics and pure speculations. You can fit any kind of physics you want into a ten dimensional space, and it stops being science and loses all power of prediction.
At time 27:02 of this interview Richard Feynman says:

"But the one field which has not admitted any evolutionary question is physics.  Here are the laws, we say.  Here are the laws today.  How did they get that way? – we don't even think of it that way.  We think: It has always been like that, the same laws – and we try to explain the universe that way.  So it might turn out that they are not the same all the time and that there is a historical, evolutionary question."

What to Learn?

"If a man's wit be wandering, let him study the mathematics."
                                                                                         - Francis Bacon

Rotation in Four Dimensions

I remember very well when reading Lev Landau's book in Russian in 2003 that I could not wrap my head around this concept of rotation in four dimensional Euclidean space and how naturally it leads to the derivation of quantum levels in a Coulomb field. Now, 10 years later, and while reading the same book again, the concept is clear and very easy to follow and understand.

There is nothing like reading the same problem again after a long time!


Stephen Hawking

Two golden nuggets in Stephen Hawking's statements in this interview with The Guardian:

"So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist."

"I don't think we will survive another thousand years without escaping beyond our fragile planet. I therefore want to encourage public interest in space, and I've been getting my training in early."


Hedonic Calculus

From Wikipedia's entry for Hedonism:


On Landau's Book

I read Lev Landau's wonderful book on quantum mechanics ten years ago when I was living in Russia. Recently I found the English translation of this book on the archive website, and started reading it again. A deeper insight and a better clarity is always gained from re-reading such excellent books more than once. The book is the third in a series of ten textbooks on theoretical physics, all of which are translated into English from the Russian original.