Różdżka, jak ją wykonać i jak się nią posługiwać?

Zasada działania i wykorzystanie różdżek Różdżki są od wieków wykorzystywane do poszukiwania żył wodnych, które mogą źle wpływać na samopoczucie lub do poszukiwania wody podczas kopania studni. Niektórzy próbują wykorzystywać je również do poszukiwania...

Read More

How to hide an image inside another image?

At first glance, there's nothing special on below image.. ..but in fact, on this picture is hidden another one: It was done, by using steganography, the second image was stored on two lowest bits of the pixels. On two bits we may save values from...

Read More

Zipf's law and natural languages

If we count the appearance of words in a sample of (most) human languages, it's visible that they have the Zipf's distribution. It can be used to distinguish human languages (and humans) from texts generated randomly (by spambots). This is presented...

Read More

How to distinguish human languages by letter frequency histogram?

How to find without dictionaries a language of a text sample? It can be accomplished by comparing frequencies of letters in a sample and in known languages. For example in polish 'a' letter is about 0.0551146 of all letters, in french it's 0.049458 and in german 0.0434701. I created a small program...

Read More