Previously we have written about the scale-free network model, which was proposed by A. L. Barabasi and his coauthors. This time we invite you to listen to the talk by this renowned scientists. His talk about the network theory and his work was recorded and published by the representatives of the Science for the Public nonprofit organization.
If one would start speaking about the dragon kings and black swans, many people would think that the one is talking about the fairy tales. But these terms are used then speaking about the events in the financial markets! Black swans are rare, but observable in the nature. Dragon kings are only observed in the fairy tales. So we would be amused if we would see the black swan with our own eyes, yet if we would see the dragon king we would be completely shocked. In nature these kinds of event are extremely rare and improbable, while in the financial markets we see these kind of events frequently enough. Bellow you can find a talk by Didier Sornette (taken from ted.com, some of the related info is available from blog.ted.com), who talks about these kind of events, their impact and possibilities to predict. Continue reading “Didier Sornette: How we can predict the next financial crisis?” »
One and half year ago world media exclaimed – finance is controled by a single super-corporation (e.g., read article in Lithuanian or English)! Evidently this conclusion is somewhat far fetched, yet it does capture one of the essential points of the underlying scientific research. The research actually shows that a comparatively small number of corporations control almost everything. Now you can listen to the one of the related researchers speaking about this discovery and hear him explain that does this actually mean. Continue reading “James B. Glattfelder: Who controls the world?” »
Previously we wrote about mathematical “puzzle” originating from a TV game (see the description of the Monty Hall problem). This time we shall consider the opposite case – the mathematical “game” used as a base for a TV game. Watch a fragment of the “Golden Balls” final stage called “Split or steal”.
The game is very simple, yet it possesses no correct solution or optimal strategy. Interestingly enough it can also be used as model for understanding social behavior of humans .
Recently on my Facebook news feed I found one article, which was rather interesting. “Teaching mathematics differently?” – ironical thought crossed my mind, while at the same time recalling some stand up comedians telling “wild” stories about the problem-based learning. It is truly funny to hear that children nowadays are forced to help the squirrel to count the nuts! Or to solve another default setup: “10 apples + 4 pears = 48 Litas, while 5 apples + 6 pears = 32 Litas, if so then how many Litas does a single apple or pear cost?” Why should anyone solve this problem in this way? Can’t the client just look up the price tags? Or check his receipt? Continue reading “Teaching math in a different way” »
Recent hurricane, which struck east coast of the USA, has very interesting symmetry properties. This natural phenomenon obeys the golden ratio! Well at least such information has been circulating on the science.memebase.com! Similar properties are also observed in some fractals such as Penrose tiling (we have not yet discussed this fractal on Physics of Risk, thus we’d like to recommend reading an article on the Wikipedia). Continue reading “Hurricane Sandy” »
There is interesting observations in the music by the great classical composers – statistical properties of their time series appear to be as complex as social phenomena considered here on Physics of Risk. Their music may seem to be both – at certain times easily anticipated and predictable, while at the other times have large unexpected deviations. Their music behaves as a pink or 1/f noise [1, 2]! In  it was shown that the intensity time series of the music by the classical composers and human speech time series have 1/f region in their spectral densities. While in  these ideas are applied towards musical rhythm. To us  is especially interesting as this paper considers our own model, [3, 4], as a proper model for the 1/f noise in the spectral density of musical rythm. Continue reading “Music, point processes and 1/f noise” »