After modifying the arduino program for measure radiation with cooking-hacks.com’s radiation board in a previous post, I realized that it wasn’t still perfect for background radiation measures: Background radiation measures are typically of very low values and given the stochastic nature of radiation (see graph on previous post), it takes some minutes to achieve a … Continue reading

# Monthly Archives: October 2014

# F2FS with ACLs on Raspbmc

I’ve always been kind of reluctant to adopt new file systems. A file system is for me a fundamental part of an OS, one which failure is an inconceivable circumstance. Nonetheless, I gladly used F2FS for the raspbmc installation on my Raspberry Pi when this distribution adopted it. And in fact it ran in very … Continue reading

# the midpoint on Poincaré’s hyperbolic plane projection

The Poincaré’s hyperbolic plane projection is a representation of the complete hyperbolic plane constrained inside a single euclidean circle. The hyperbolic plane is an impressive achievement of mathematics trying to answer the so called “parallels problem”: given a line and an external point to it, is there just one possible parallel through this point? The … Continue reading