VI. Translate the following word-combinations into Ukrainian.

common usage, automatic dishwashers, result from, common char-s, primitive automatic machines, controlling functions, electronic computing devices.

Lesson 8-9

1. Read and translate the text

The Development of Radio Engineering and Electronics.

The invention of electronic devices whose activity is based upon the flow of free electrons in a vacuum, has considerably enlarged. The ap­plication of electrical energy for various industrial purposes. It is electronic devices that made it possible to solve the problem оf obtaining high-frequency currents which are the basis of radio-engi­neering, television, "talkies",* radar and other very important branches of modern engineering.

Radio, one of the greatest achievements was born in Russia. A. S. Ророv demonstrated the first radio receiving set in the world as far back as 1895.

Broadcasting is considered to be developed in the USSR along with short waves. For the lime being radio broadcasting has become a part of our life. The basic devices in radio engineering are known to be radio-transmilting and radio-receiving ones. The theory of both these devices was developed by Soviet scientists.

In the early 30s Academician A. I. Berg developed the theory of radio-transmitting devices.Academician Vvcdenskey is known to have con­tributed a great deal to the successful development of radio elec­tronics. His investigations in the field of propagation of ultra-short waves proved to the of particularly great significance. The results of these researches are increasingly used in television, radar and other fields of radio engineering.

Without radio elec­tronics we would not have cybernetics, cosmonautics and nuclear phys­ics. No book on electricity would be complete without mentioning elec­tronics.

In the field of television our country was the first as compared with other countries. As early as the 20's in Moscow under the supervision of V. 1. Archangelsky television signals were transmitted for the first time. In the early 30's electronic television was being developed. Prin­ciples of electronic television suggested by B. L. Rosing were put into practice by S. I. Katayev and other Soviet specialists. In 1939 the Moscow television centre was put into operation. The newly built 500 metre television tower in Moscow makes it possible to extend direct broadcasts to more than a hundred kilometers.

As far us radar is concerned such specialists made a great con­tribution. They are N. F. Alekseyev and D. E.Malyarov. One of the first radars is known lo have been worked out by Kobzaryov. is carried out using ultra-short waves.

2. Give Ukrainian equivalents to the following:

The invention of electronic devices

electrical energy

high-frequency currents

to base the activity upon

the flow of free electrons in a vacuum

radio-receiving set

broadcasting

nuclear physics

to transmit signals

to make a great contribution

to put into operation

succesful development.