The title of this post is maybe not correct in a mathematical sense, but I was asking myself if there exists an estimator for the “standard deviation of a standard deviation” or a kind of error bound for a sample…
The title of this post is maybe not correct in a mathematical sense, but I was asking myself if there exists an estimator for the “standard deviation of a standard deviation” or a kind of error bound for a sample…
Imagine you have a text (ASCII) file that holds a table/matrix, e.g. A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 C1 C2 C3 C4 C5 but what you need, is the information transposed, i.e. A1 B1 C1 A2…
I don’t own a car and I am of the opinion that in my current environment (Tokyo) a car is a waste of money, resources, time and nerves. I am sure there are places where you really need a car…
First of all, I wish all my readers a Happy New Year. After taking off the last two weeks and returning to Austria for Christmas holidays I am back in the office today. Before really starting in 2013 it is…
The last days and weeks I did not have much time for blogging since I was busy applying for a research grant as well as doing some calculations for an upcoming meeting. For the latter task, I used quite a…
When you need to go to a hospital you expect that you get the same treatment independently from the season of the year. Well, that’s basically true. However, depending on the graduation dates of the universities or the hospital’s recruiting…
I guess you remember the Tarzan movies and that guy swinging from liana to liana. Maybe, you have asked yourself “How far can he jump when using the liana swing technique”? A Japanese researcher has tackled the problem and came…
Google Scholar is likely the most useful application for scientists provided by the guys from Mountain View. First of all, it is free. Similar services like the Web of Knowledge are only accessible if your institute pays for that. One…
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…
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…