January 2012
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“We believe that the next step in copying will be made from digital form into...”
– In an important move, bit torrent portal The Pirate Bay announces a new category of torrents called Physibles, focusing on sharing 3-D printing designs – affirmation for these 7 platforms changing the future of collaborative creation.
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I can pinpoint the exact moment when I first thought I could write a novel. It was around one thirty in the afternoon of April 1, 1978. I was at Jingu Stadium that day, alone in the outfield drinking beer and watching the game. Jingu Stadium was within walking distance of my apartment at the time, and I was a fairly big Yakult Swallows fan. It was a perfectly beautiful spring day, not a cloud in...
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Quantifying reflexivity in financial markets:... →
We introduce a new measure of activity of financial markets that provides a direct access to their level of endogeneity. This measure quantifies how much of price changes are due to endogenous feedback processes, as opposed to exogenous news. For this, we calibrate the self-excited conditional Poisson Hawkes model, which combines in a natural and parsimonious way exogenous influences with...
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It is commonly believed that with aging comes an inevitable decline from vitality to frailty. This includes feeling weak and often the loss of independence. These declines may have more to do with lifestyle choices, including sedentary living and poor nutrition, than the absolute potential of musculoskeletal aging. In this study, we sought to eliminate the confounding variables of sedentary...
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Estimating the bias of a noisy coin →
arxiv-math:
Authors: Christopher Ferrie, Robin Blume-Kohout
Optimal estimation of a coin’s bias using noisy data is surprisingly different from the same problem with noiseless data. We study this problem using entropy risk to quantify estimators’ accuracy. We generalize the “add Beta” estimators that work well for noiseless coins, and we find that these hedged maximum-likelihood (HML)...
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Pasta Geometries →
Mathematical equations, images and descriptions of unusual pasta shapes from “Pasta by Design” by George L. Legendre.
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The greatest mystery of the Inca Empire was its... →
In the fifteenth and sixteenth centuries, the Inca Empire was the largest South America had ever known. Centered in Peru, it stretched across the Andes’ mountain tops and down to the shoreline, incorporating lands from today’s Colombia, Chile, Bolivia, Ecuador, Argentina and Peru - all connected by a vast highway system whose complexity rivaled any in the Old World. Rich in foodstuffs,...
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December 2011
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November 2011
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