Posts

Post has attachment

Post has attachment

Dmytro Korduban commented on a post on Blogger.

It's quite a drop, I'd say.

Add a comment...

Post has attachment

Google search suggest shows a trend.

2014-02-24

2 Photos - View album

Add a comment...

As Ukrainian quasi-government continue threatening us with the Internet shutdown, I'm more and more interested in solutions like this http://www.olsr.org/. Afaik it's successfully used by free open

network in Vienna http://www.funkfeuer.at/.

I wonder how much WLAN router penetration (in terms of router/km^2 or better, say, router/apartment block for Kiev) do you need to make network 1-connected.

If you live in #Kiev and have thoughts about how to launch this, or at least want to test it -- please share with me too.

Please contribute if you know alternative

#euromaydan #евромайдан #євромайдан

network in Vienna http://www.funkfeuer.at/.

I wonder how much WLAN router penetration (in terms of router/km^2 or better, say, router/apartment block for Kiev) do you need to make network 1-connected.

If you live in #Kiev and have thoughts about how to launch this, or at least want to test it -- please share with me too.

Please contribute if you know alternative

*working*,*cheap*wireless mesh network solutions.#euromaydan #евромайдан #євромайдан

Add a comment...

Post has attachment

Add a comment...

Post has attachment

I'm teaching introductory probability course to students with little to no calculus background. So I'm trying to keep things as elementary as possible, but also to give as much as possible (students do quite well as for now).

Common approach as I see it is to limit oneself with discrete probability and cover random events, conditional probability, independence, maybe inclusion-exclusion principle, then random variables, expectations, popular discrete distributions, generating/characteristic functions with applications, Markov and Chebyshev inequalities, law of large numbers and central limit theorem (at least in form of de Moivre-Laplace theorem).

I don't want to give anything without proof, so even DMLT is somewhat problematic. (No calculus!) After some thought I realized that I can prove Chernoff inequality instead, which is almost as good by practical means (gives $e^{-\Omega(t^2)}$ bound on $t\sigma$-concentration of binomial distribution around its expectation) and requires only knowledge of exponent series expansion. http://goo.gl/bPDsjv

Also I've found a nice question on mathoverflow about elementary statistics course http://goo.gl/kAPNCK which is a natural sequel to what I'm doing now.

If you know some meaningful probability problems that can be elementary solved, please contribute. #matheducation #probability

Common approach as I see it is to limit oneself with discrete probability and cover random events, conditional probability, independence, maybe inclusion-exclusion principle, then random variables, expectations, popular discrete distributions, generating/characteristic functions with applications, Markov and Chebyshev inequalities, law of large numbers and central limit theorem (at least in form of de Moivre-Laplace theorem).

I don't want to give anything without proof, so even DMLT is somewhat problematic. (No calculus!) After some thought I realized that I can prove Chernoff inequality instead, which is almost as good by practical means (gives $e^{-\Omega(t^2)}$ bound on $t\sigma$-concentration of binomial distribution around its expectation) and requires only knowledge of exponent series expansion. http://goo.gl/bPDsjv

Also I've found a nice question on mathoverflow about elementary statistics course http://goo.gl/kAPNCK which is a natural sequel to what I'm doing now.

If you know some meaningful probability problems that can be elementary solved, please contribute. #matheducation #probability

Add a comment...

Post has attachment

Complying to own New Year resolution is surprisingly difficult. I'm already thinking about prewriting some meaningful stuff during the moments of inspiration to save for the busy days when I can only manage a reflexive or twitter style post.

Well, at least this is longer than 6 words.

Well, at least this is longer than 6 words.

Add a comment...

Staying overnight in Geneva. Google Now suggests "Guten Abend" in the translation card. Well, at least they tried. #GoogleNow #Android

Add a comment...

Post has attachment

I'm a big fan of contrast shower as a caffeine-free way of waking up. I formed this habit when I started participating in TopCoder contests. Oh, those 4 AM SRMs!

For some time I thought its effectiveness has something to do with mammalian diving reflex (http://goo.gl/9tBx), but as it happens it's a common misconception. The actual mechanism is a bit more straightforward. (http://goo.gl/BmYAiH)

Yay to life-saving (and day-saving) reflexes!

For some time I thought its effectiveness has something to do with mammalian diving reflex (http://goo.gl/9tBx), but as it happens it's a common misconception. The actual mechanism is a bit more straightforward. (http://goo.gl/BmYAiH)

Yay to life-saving (and day-saving) reflexes!

Add a comment...

Wait while more posts are being loaded