Recently many currencies have been revalued w.r.t. the US dollar. Thus, I was thinking to apply a mathematical tool which I am using for my research and see how this works for financial numbers. I have downloaded historical exchange rates…
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Until Fedora 15 I somehow managed to get the NVIDIA driver and the CUDA compiler running, but Fedora 16 seems to quite of a hurdle. I tried something similar as for F15, including a patch which solves the Kernel version…
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The bilinear interpolation is a quite useful mathematical approach when it comes to interpolation in a two- or higher-dimensional regular grid. Other than a nearest neighbour approach or simple block averaging, this method provides a somewhat “continuous” field. Thereby, one…
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OK, this post is going to be a little bit longer than the usual article which I am writing here. First, I was thinking to summarize my thoughts in a short note, but why not post it here directly? So…
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A few months ago I wrote about the Karhunen-Loève Transform (KLT) which could be an interesting alternative for continuous wavelet transforms. I almost forgot about that topic, but today I stumbled over it again. Thus I applied it to my…
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I happens quite often that I need to insert an equation in one of my presentation slides or posters. Although either OpenOffice or Powerpoint have some way to present formulas or equations, their quality and appeal is quite poor. For…
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This post will be a little bit longer as the usual ones, as it deals with some thoughts which I had when playing with GPS orbits. Assuming that you want to estimate the position by means of GPS it is…
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Today I stumbled over this interesting paper which describes the usage of the Karhunen-Loève Transform (KLT) for (weak) signal detection in time-series. Although there are many similarities with wavelet analysis, the KLT seems to be less computationally demanding (but its…
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The Generic Mapping Tools (GMT) are a convenient software package for displaying data on a large variety of map projections. Until now data could be converted into GMT native (i.e. NetCDF) format and then output to postscript. With the announcement…
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I am now writing code for NVIDIA GPUs based on CUDA for almost three years. Every two or three months I am thinking to purchase an ATI card and compare its performance to one of the latest NVIDIA cards (e.g.…
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