Today I had to recall some basic theorem which I learnt in one of the introduction courses on statistics at university – the “central limit theorem“. The central limit theorem states that, given certain conditions, … the mean of a…
See more ›
Blog Archives
Central limit theorem
The birthday paradox
First the hard facts: In a room of just 23 people there’s a 50-50 chance of two people having the same birthday. In a room of 75 there’s a 99.9% chance of two people matching. Sounds crazy? Well at the…
See more ›
Stopping the sonic boom
Scientists have re-engineered a more than 50 year old concept which prevents the sonic boom. As this article summarizes, the concept bases on a biplane with wings connected at their tips. The original idea comes from the German engineer Adolf…
See more ›
Additive noise
Whenever you measure something you usually repeat these measurements, in order to determine not only the quantity you are looking for but also access its uncertainty. Given that you have measured different quantities and derive a new one from a…
See more ›
Posted in math, programming
Exchange rate stability
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…
See more ›
Posted in math
Fedora 16 and CUDA
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…
See more ›
Formal errors of bilinear interpolation
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…
See more ›
The impact of constraints on linear least-squares problems
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…
See more ›
Posted in math, programming
Applying the KLT to my blog stats
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…
See more ›
Online LaTex formula generator
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…
See more ›
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- June 2009
- March 2009
- February 2009
- December 2008
- October 2008
- September 2008
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- book (4)
- computer (124)
- Drink (37)
- Food (56)
- GPS (15)
- handy phone (3)
- ionosphere (1)
- Japanese (107)
- math (33)
- paper (19)
- programming (62)
- Spicy recommendation (24)
- sports (24)
- travel (61)
- Uncategorized (80)