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Miguel

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  • Then we might want to do something like names(HadCRUT4)
  • John, taking a cue from your recent Google+ post on this I decided to download the data file http://www.cru.uea.ac.uk/cru/data/temperature/HadCRUT4-gl.dat and try to read it into R. I have to say this is one of the nastiest text input files I've…
  • it's come up that in some parts of europe the natural decimal separator is the comma, but in combination with () parentheses these can look a lot like tuples It's not so much a regional issue as a language issue. Traditionally in various Europe…
  • Political trends usually don't make it across the Atlantic. There isn't even a party that comes any close to the US-Republicans in Europe. I beg to differ on both counts - there are even avowed fans of the Tea Party in high places in the EPP, b…
  • It isn't even politics (for European standards of political discourse). I would strongly object wasting any space on Azimuth for this. You're not aware that, partly under US republican and allied media influence, the EPP (largest European polit…
  • Let's not forget the role that Amartya Sen has found that the unresponsiveness of political regimes has in causing famines. Similarly, if people feel the political system is responsive, there won't be food riots. It is possibly the case that, whil…
  • Now done...
  • I have now expanded the article with a short analytical discussion of instability of a particular delayed-feedback system: $$ \dot x(t) = - x(t-\Delta) $$ and some observations about the implications for numerical stability and the noise-driven ve…
  • Somewhat tangentially... 5 (gasp!) years ago the European Commission opened a consultation on biofuels. The EU's policy target was that biofuels should achieve a market share of 5.75% in the EU by 2010. On a community blog I'm active in, we entered…
  • I couldn't resist the urge to hint at Kolmogorov extension, before I saw this thread... Anyway, I made the text a little longer - mostly the idea that one can view the stochastic differential equations as consistency conditions on a bunch of random…
  • I added to the boring stub a discussion of how it can be chaotic. So far I've developed the discrete case. The continuous case displays chaos if the logistic growth model is given delayed feedback. As for how the logistic function describes oil d…
  • Also in The Guardian [UK]: Mass tree deaths prompt fears of Amazon 'climate tipping point'
  • I'm a bit worried (though I don't have any data) about the sustainability and economies of scale of biochar. Consider the following from wikipedia The massive production of charcoal (at its height employing hundreds of thousands, mainly in Alpin…
    in Biochar Comment by Miguel February 2011
  • John writes: I've never understood this, so I can't write that paragraph. But this seems to be a valuable paragraph that's hard to find. For example, Wikipedia writes: Depending on the problem in consideration, Stratonovich or Itō in…