I may have learnt all about the Greek letter pi at school and its significance in maths for calculating things to do with circles, but it’s actually something else that I remember it for.
In a special episode of Dr.Who, broadcast as part of “Children in Need”, the Master skipped across a chequered floor and retorted “try it Doctor, it’s as easy as pi”, to which the Doctor eventually muttered “3.14159265”.
I remember that scene so clearly, that it has helped me to memorise the beginning of pi for years. Since most people only remember the 3.14 bit, it’s almost showing off to know so many numbers in it, and yet there are a handful of people out there who have memorised a lot more of them.
So I guess they in particular will have celebrated pi day last Friday. Now, I know it’s an important number, but does it really need a day named after it?
As easy as pi?
Web tracking and privacy
About 14 years ago I had e-mail contact with Tim Berners-Lee – the man who had just created a thing called the World-Wide-Web. I was a student, and he was an internet pioneer. At the time, we both used the same type of PDA!
Today there is an interview with him on BBC News with a Q&A, on topics not unlike I get asked about myself.
So what’s my view on internet privacy?
Well, living in Germany we have fairly strict laws on such things. You can’t just have your e-mail address added to a mailing list – you have to give permission and it’s up to the owner of the list to prove that you gave it. Cold calling private households is illegal as well.
Over the years I’ve become a defender of such rights. I blog about unwanted e-mails and telephone calls and often try to follow how my personal data has got from one system to another.
And yet I am just as fascinated when sites such as Amazon recommend me items based on previous purchases, much in the same way I recommend products to my own customers.
Except of course, my recommendations are based on my knowledge of peoples’ requirements – Amazon does it automatically based on the data that they have saved about me.
There are many systems on the internet that are free to use for personal use, provided you accept their advertising, such as my favourite virus scanner.
But what would happen if my provider allowed me a discount for being allowed to process the web sites that I visited – or worse, made me pay a surcharge for not doing it?
In the case of a discount, I would have to think long and hard about it. I would certainly try to avoid any surcharge.
But being in Germany I hope that, like so many other things, such systems will have to be “opt-in” so that I won’t suddenly find myself viewing advertisements based on where I surfed to yesterday.
Sometimes having such strict privacy laws can be useful.
Karfreitag
Karfreitag is the name for Good Friday – the Friday before Easter Sunday.
It is also known as Stiller Freitag or Hoher Freitag and is a day in remembrance of the crucifixion of Jesus Christ.
For Catholics it is a day of fasting and traditionally people eat fish on this day and avoid alcohol.
In Germany it is a public holiday.
To hear a simple explanation and a short discussion in German, listen to the podcast:
(Press the “play” button to listen to the podcast)