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2. Find the words with an opposite meaning in the text.

a) rigidity; b) unwanted; c) exclude; d) to reduce; e) minor, unimportant;

f) disintegrate; g) seller

3. Fill in the correct words from the active vocabulary.

1. The number of simultaneous users that can … the contents of the database is also an important factor.

2. Many companies later are forced to … to a new DBMS when the original does not meet expectations.

  1. Clearly, a database that is meant to be used in a large workgroup must be able to support a number of … users.

  2. The size determines the overall storage … for the database.

  3. Unfortunately, many companies make a poor DBMS choice in this regard and then later are forced to convert to a new DBMS when the original … .

  4. The term … is sometimes used to describe how well a database performs.

  1. Read the sentences translating the Russian fragment into English:

    1. A highly scalable database management system is desirable, (чтобы обеспечить гибкость).

    2. Important characteristics of databases include the size of the database, number of concurrent users, performance, (возможность СУБД объединяться с другими системами).

    3. (Термин масштабируемость) is sometimes used to describe how well a database performs.

    4. (Информационные потребности организации) affect what type of data is collected and what type of database management system is used.

    5. Clearly, a database that is meant to be used in a large workgroup must be able to (поддерживать большое количество пользователей).

    6. Most database management systems (могут управлять) relatively small databases of less than 100 million bytes.

  1. Answer the questions.

1. What do the information needs of the organization affect?

2. Which databases can most database management systems handle?

3. What is desirable to provide flexibility?

4. What does the size of database determine?

5. Can you enumerate the most important characteristics of databases?

SPEAKING PRACTICE

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 intelligence is 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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