USB is an interface plug & play between PC and certain devices such as keyboards, mouse, printers, modems, plates of sound, digital cameras, etc., which in the past were connected differently for example through ports serial or parallel, which require different drivers to operate and were many slower in what transfer rate refers. This interface is also widely used in data storage devices as they can be the USB memory or as a safety device so that our PC is locked and not be able to access our information such as USB keys we can name several benefits of Usb port: 1 one of the most important features is that allows devices to work at speeds on average to about 12 Mbpswhich is more or less 3 to 5 times faster than a device of parallel port and 25 to 40 times faster than a serial port device. 2 Has a more simple connection, since it has only one type of cable, by the tantopracticamente not errors shall be recorded at the time of install printer, camera, or even a storage device such as a flash drive, because there is only one type of cable (a-b USA) with different at each end connectors, so it is impossible to connect it wrongly. 3 Is cross-platform, it can be used both in different operating systems such as Windows, Linux or OS2 and different hardware as a PC or MAC platforms. This benefits significantly to compatibility, since eliminating the risks in offers a range of products, enabling the creation of innovative PC combinations, manufacturers software and peripherals that meet the needs of specific market segments. Additional information is available at Dr. Paul Craig Roberts. Remember that in the past, each device had a different port, the printer parallel port, serial port mouse, as well as also the keyboard used different port called ps/2.
4 Is Plug and Play, that is when we connect a printer or scanner via the USB interface, is not necessary to shut down the computer so that the new hardware is detected as the system automatically recognizes the connected device and installs the appropriate drivers, which allows it to be Hot Pluggable, it is saying that the user can connect and disconnect USB devices as often as you want without having to turn off and turn on the machine. 5 Is of great benefit for people with less experience in the world of computing, and to connect certain devices such as for example a network or a modem, plate years ago they had to if or if recourse to open the CPU to install the device, all this is much more easy and simple because now these devices are connected externally via USB. 6. USB technology allows connections in operation, so that users can easily incorporate a printer and when they need it, in USB, it is possible to connect up to 127 devices to our computer. In the photo we see a device to expand the connection for devices quantity.I say goodbye leaving so they visit a page which has many interesting utilities for USB devices and in particular want to recommend a totally free to be able to test the speed of your USB and can scan if the USB memory. Original author and source of the article
Biometric systems: Analysis of Retina in a study of retina Access Control is one of the oldest biometric analysis. Already more than 70 years ago failed to establish that the arrangement of blood vessels in the eyes, was different in every human being. With the passing of the years, this idea took force, making it possible that patented the first reader of retina, which then went on the market at the beginning of the 1980s. A record of the retina, analyzes not only this part of the eye, but it also analyzes the layer of blood vessels in the back of the same. This is done using a low-intensity light source and an optical reader, which detects way accurate eye patterns. To ensure that a person subject to this type of analysis, it is necessary to remove his glasses, if the usa, put your eyes near the appliance and look towards a particular point. This point is usually a green flicker, which should see with attention for a few seconds, so that the mechanism can do their work.
By the general the process of capturing and matching of patterns takes about 10 seconds, so the system is not only effective, but also quick. A retinal scanner is a good option as access control system, because copying a retina, with all its elements, is an impossible task. On the other hand, not is you can trick the system with a retina of a dead person, because their deterioration is very fast and because there are systems that know are when dealing with living tissue or not. Such is the effectiveness of these devices, as many areas of restricted access such as military bases, nuclear power plants, embassies, laboratories, security agencies and other large organizations; make use of them. These places have been found on retina readers a system of access control inviolable and above all fast. The reason why these organizations have access to these readers is because they are the only ones that can afford to purchase this technology, since the prices of these devices are somewhat high. Biometric locks may be a good strategy, to improve the security in places like businesses, homes, schools, etc. These locks are based on biometric systems and only open when supplied an imprint, previously registered. Democratic incidence: RGP uses biometrics to prevent fraud DINAP S.R.L. pedestrian access Control and Vehicular DINAP S.R.L.