Physical to the digital world! The Code Semacode (and others like it: Barcode , Data Matrix , MaxiCode , QR Code ) is conceptually equal to the typical bar code products from the supermarket, basically contains data (oddly enough! .)

The difference from the typical bar code is that it only stores numbers, whereas the Semacode (and derivatives) stores characters, which can be stored phrases, personal data, or better yet: URLs!

And as I read the hell these "puzzles"?!

To read need any compatible reader. (Effective response if any!), The latest camera phone models support reading such codes!, Such as the N95.

This is an example: Continue reading "What the hell is UPC code Semacode, QR Code, Datamatrix, and other herbs? '"

Global Positioning System
(In some places call: Global Positioning Satellite)
or Castilian: Global Positioning System.

Above our heads (about 20,000 km) there are 24 satellites orbiting the earth, each of these carry an atomic clock and are mutually synchronized.
Using Radio Frequency , they emit a signal to the world (heh, sounds crazy, but is literal, "everyone"), something like a ping (" broadcasteado "), the GPS receivers are as the Garmin , other brands, and my beloved Nokia N95 , only receive satellite signals that are "visible" (clear sky), with 4 satellites and can begin to calculate the location.

Navstar, one of the satellites

As you do this?
Continue reading "What the hell is GPS? '"