Funny Captchas

Spam is an omnipresent problem on the Internet these days. Not only email is affected with approximately 100 billion Spam mails a day, but also search engines, instant messaging services, forums, and blog comments.
One temporary solution to reduce Spam in wikis, forums and blogs are reverse Turing tests or Captchas (Completely Automated Public Turing test to tell Computers and Humans Apart).


Tontie is a quite simple game. It's played on a 3x3 grid and from time to time teletubbie-like critters appear. Your job is to hit them with a hammer by pressing the according key on your numeric pad.

Every new level is getting a bit more difficult. Some critters have to be hit multiple times and some must not be touched. Those Eye-Monsters shown in the screenshot are especially confusing as you have to press their number and not the key matching their position.
You can collect coins and buy new and more powerful hammers etc. It's really a fun game.


Ich hab vor einiger Zeit für verschiedene Organisationen Flyer, Heftchen und Plakate layoutet und dabei große Teile der digitalen Druckvorstufe übernommen. Ganz hilfreich waren dabei die zwei unten vorgestellten Tutorials.

Excel: Week number

There are several ways to refer to dates. You can use exact dates like "January 1st, 2008", or you may use less precise descriptions like "in April 2008" or "next year". Usually everybody familiar with the western calendar will know what timeframe you are talking about. That's not the case if you're referring to week numbers, as there are several ways to calculate them.

Get Perpendicular

The first computer I worked on had no hard-drive at all, just wobbly floppy disks. Later, I guess it was on a 80286, we had our first hard drive with a nearly infinite storage of 20 MB. Year after year hard-drive capacities got bigger and bigger and the actual drives got smaller and smaller. Just compare those 5 ½"–douple height drives with 20 MB and current iPod disks with 1.8" and 160 Gigs.

Have you ever asked yourself how this is possible. How can more and more bits be stored on modern hard-drives?

A computer vision from 1967

This is a clip from 1967 and it features a computer vision for the year 1997. The technical aspects aren't that interesting, but take a look at the social ones:

What the wife selects [she's shopping] on her console will be paid for by the husband at his counterpart console.

The wife is surfing some web-like-thing to do some – what else? – shopping and she looks after the kids by using a big brother-like omnipresent monitoring system. Her husband has to do all the financial stuff like paying the new dress for his wife.


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