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Access control is really a system enabling authorities to manipulate entry to areas and resources in a very given physical facility or computer-based information system. Access control is, in fact, a standard, everyday phenomenon. For example, a lock on the car door is actually a form of access control. The PIN on a bank's ATM strategy is another way of access control. Even nightclub bouncers, standing in front of your door, are another example of (perhaps) a far more primitive mode of access control. Using an access control mechanism is very important when persons look to secure confidential, important, or sensitive information and equipment
The Volkswagen Beetle is strong competitor of Mercedes Smart. It has a cute exterior design, with nice, curved lines, even though the interior features a multi-functional sport steering wheel, making the car all to easy to control, plus a comfortable back-seat with plenty of legroom, uncharacteristic for such vehicles. Its fuel economy is a little worse compared to the Smart, with 22 mpg/city and 31 mpg/highway, nevertheless the great security features and excellent design must be reason enough to draw young drivers.
A generator is an electrical machine which converts mechanical form of energy into electrical form. Generator works on the principle that whenever a conductor moves in a magnetic field, an emf gets induced in the conductor. This principle is called as generator action.
However, science and technology are two different social cultures, and the differences between them are obvious. The basic task of science is to know the world and find it, thus increasing the intellectual wealth of mankind. The basic task of technology is to discover the world and invent it to create the material wealth of mankind and enrich the spiritual and cultural life of human society. Science answers questions about "what" and "why"; The technology answers the question "what to do" and "how to do". Therefore, the results of science and technology are different in form. Scientific achievements are generally expressed as concepts, laws, papers and other forms. The technical results are usually in the form of process flow, design drawing, operation method and so on. Scientific products are generally not commercial and technological achievements can be commoditized. Modern technology has a strong utilitarian and commercial color.
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