Archive for May, 2009
Witten interviewed by Ira Flatow on Big Ideas: video of the day
.. and a very clear introduction into string and M-theory for dummies
Fermi telescope does not confirm DM claims
Fermi Space Telescope (image by NASA)
Fermi gamma-ray space telescope was unable to predict the presence of the 300-800 GeV peak in the distribution function of high energy electrons in cosmic rays. Let me remind you that the anomaly we are talking about was claimed to be found by the ATIC team and generated recently a lot of buzz in high energy physics community (one source of those high energy electrons may be decay of dark matter particles).
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387. Gapminder and dynamical visualization
Nowadays, in statistical analysis of various economic or social factors we mostly use plots where time is just another coordinate along another axis. In real life we do feel time and dynamics of various processes in a different fashion – time is more like a sequence/collection of snapshots taken at its different moments, in the same sense as a movie being a sequence of frames.
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386. Saturday’s photoguess
The questions related to this photoguess: a) what is the physical phenomenon on the photo? b) who made it? (where it was made?)
Seek and thou shalt find!
Update: kudos to hukrepus 
, according to him/her this is
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385. NEQNET: Last two weeks of April
The last month of the spring 2009 has started. Like all crazies, who usually get a bit more active during spring, I want (need) to become more active – my spirit requires some change. In this respect, I would like to ask you – what do you want to see new on NEQNET? New design? New guest bloggers? Are you unhappy about anything, that is, do you think that something has to be improved on the blog? Do you want to discuss some particular topic?
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384. More news from NASA
First, it seems that Orion will generally (that is, not just on missions to the Moon) carry 4 astronauts instead of 6, as was initially planned. This is fantastic news for the Russian Space Agency, since NASA will have to use Soyuz spacecrafts as an escape module for ISS – the number of crew members is going back to 6 starting next year.
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383. Puzzling kinetics of Bose-Enstein condensation
Just finished reading a really review “Magnon BEC and spin superfluidity” by Yu. Bunkov and G. Volovik, which left me with quite a bit of material to think about… Probably the thing that stroke me most after digesting the review is how poorly I (or in truth – it’s better to say “we”) actually understand the kinetics of Bose-Einstein condensation. But before I’ll try to explain why I think so, let me briefly describe the setup discussed by the authors.
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