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How are Internet users unknowingly helping to digitize old books?

How are Internet users unknowingly helping to digitize old booksTo begin with lets explain what kind of problem code CAPTCHA is. Explanation in English can be as follows: «Completely Automated Public Turing test to tell Computers and Humans Apart». In other words it’s much easier – it helps to distinguish computers from the people. This text is sometimes very useful, moreover, it is used by a very wide audience.

What is the purpose of capture using?

For example, in all of your favorite social network Facebook it should be administered, if the number of operations for a certain period of time exceeds the allowable conditions. Roughly speaking, if you send 50 messages in a row of intervals of 1 second, then surely CAPTCHA pops up, as you will be suspected in spam. But spam is made mostly by the robots, which can not (according to the authors) enter text from the picture. Accordingly, it is a necessary measure, which protects the resources from the spam and the increased load when attacking bots.

However, captcha is not always helpful, since not for each lock the key can be found, otherwise the lock will break and become useless. Most of the drawings can be identified by neural networks, if previously coaching them on many examples (several tens or even hundreds of thousands).

On many sites to confirm that you are a real person, not a robot, it is necessary to solve the so-called “captcha” – for example, to recognize the distorted letters in the image. Among the embodiments of these systems reCAPTCHA is the most significant. The user is prompted to enter the two words which are taken from scanned books. One word is easy to read, and according to it the checking is made, and the second word is much more complex, and its accuracy is not analyzed, since it is not recognized by the automatic scanning system. These words are offered to different people, and then the system takes the option that is introduced the most frequently – thus millions of Internet users are helping computers in the digitization of old books.

3D-technology – what it is and with what it is eaten?

3D-technologyIn 2010 3D technology was considered perhaps the most popular and marketable innovation. Interest in 3D now is lower, and every day there are more and more people who are dissatisfied with it. However, the criticism is just another step on the path to progress. In this article it will be discussed how the volume 3D is gotten, and what technologies are used for this purpose.

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GPS navigation systems for cars

The rapid advancement in technology in the last decade has transformed a number of devices and gadgets to a point where they are almost unrecognizable from their original form. Long gone are the days of big and awkward GPS units that had lousy reception and an accuracy that basically equaled zero. The advent of more complex and sophisticated GPS units has now made it possible for almost every new car to incorporate a portable navigation system. These gadgets are useful not only in helping you avoid getting lost, but can also inform you of the proximity and location of commercial establishments whose services you might require while on the road. The possibilities are limitless with this awesome technology!

The ability of GPS units to provide you with such useful information is due to their capability of storing “Points of interest” (POI) in their memories. Also known as “waypoints”, a GPS point of interest is stored using its geographic coordinates, plus additional information such as name and telephone number of the specific location. Precise directions are then displayed in a vector road map, while the navigation unit tells you which turn to take and how far you are from the selected destination.

When talking about the current best GPS navigation units, one must definitely mention the Garmin Nuvit 3790T. This great device comes preloaded with more than 6 million points of interest such as restaurants, hotels, gas stations, and various types of stores. However, this unit is by no means the only exceptional GPS navigation device. Other high-end models include Motorola MotoNav TN765t, the TomTom XL 340 S, and the Magellan RoadMate 1470.