Santa’s Christmas delivery route revealed

Data visualisation meets children’s curiosity. We immerse ourselves in geoinformatics to find out how postal services in the USA, in Germany and in Hungary carved their countries into mosaics of postal code areas. Visually striking maps emerge from the opaque depths of numerical data.

Whoever still sends letters by post will notice that addresses closest to you share your postal code or differ only slightly, but opposite corners of your country will have very different codes. How do postal services cover countries with postal codes?

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When are kids born? Anyway, when are babies conceived?

My current subject is the seasonality in the number of births. I have looked up the number of live births in several countries over a number of years with monthly resolution. My primary question is whether there are certain months of the year in which more babies are born than could be expected.

There are a few other related, truly intriguing questions, but we will not be able to say much about them based on the available data beyond mere speculation. The most directly accessible one is the seasonality in conception rate: to what extent is it defined by seasons (time spent indoors and the like), and how much influence does culture have on it? What would also be very interesting to find out is the seasonality in the number of sexual intercourses. Well, I can’t say much about the latter one, but I will explain why. Continue reading

Height matching for a harmonious-looking pair

I’m somewhat obsessed with the heights of people around me. I also have an interest in harmony and aesthetics. So I have been thinking what height proportions make a nice couple. If you are looking for a partner from the opposite sex (whether for a romantic relationship or for dancing), what height would be a good match to yours?

What follows is going to involve data analysis but there will be nothing inherently scientific about it. Continue reading