Speak on the following topics.

1. Databases for multiusers systems.

2. Main principles of relational database.

3. Levels of database access.

4. Databases security.

UNIT 7: ARTIFICIAL INTELLIGENCE

Active vocabulary:

artificial intelligence	expert system
vision system	robotics
learning system	neural network
simulate	manipulate
replace	require
limit	logical
rational

Text A: Artificial Intelligence

Of all the technologies the most far-reaching in its potential impact is artificial intelligence (AI). Computer scientists believe that the one area of human intelligence which is at the core of human intelligence is what is often called common sense.

The term artificial intelligenceis used to describe computers with the ability to mimic or duplicate the functions of the human brain. The objective of building AI systems is to replicate human decision making for certain types of well-defined problems.

Intelligent behavior has several characteristics, including the abilities to learn from experience and apply this knowledge to new experiences; handle complex situations and solve problems for which pieces of information may be missing; think in a logical and rational manner and give a quick and correct response; and understand visual images and processing symbols.

Artificial intelligence is a broad field that includes several key components, such as expert systems, robotics, vision systems, learning systems, and neural networks. An expert system consists of the hardware and software to produce systems that act or behave like a human expert in a field or area (e.g., credit analysis). Robotics involves developing mechanical or computer devices to perform tasks that require a high degree of precision. Vision systems permit computers to capture, store, and manipulate images and pictures. Learning systems allow the computer to change how It functions or reacts to situations based on feedback it receives (e.g. a computerized chess game). A neural network is a computer system that can simulate the functioning of a human brain.

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