- •Read and translate the text in writing.
- •Analyze grammar in the underlined words and word combinations (in writing).
- •Make up 5 questions of different types to the text (in writing). Text 2
- •Read and translate the text in writing. Colour television
- •Analyze grammar in the underlined words and word combinations (in writing).
- •Make up 5 questions of different types to the text (in writing). Text 3
- •Read and translate the text in writing. Storing information
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- •Make up 5 questions of different types to the text (in writing). Text 4
- •1. Read and translate the text in writing.
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- •Make up 5 questions of different types to the text (in writing). Text 5
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- •Computer Memory
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- •Make up 5 questions of different types to the text (in writing). Text 6
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- •Communications Channels
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- •Wide Area Networks
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- •Make up 5 questions of different types to the text (in writing). Text 8
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- •Computer criminals
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- •Make up 5 questions of different types to the text (in writing). Text 9
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- •System Board
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- •Make up 5 questions of different types to the text (in writing). Text 10
- •1. Read and translate the text in writing.
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- •Make up 5 questions of different types to the text (in writing). Text 11
- •1. Read and translate the text in writing.
- •Types of cables
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- •Make up 5 questions of different types to the text (in writing). Text 12
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- •Make up 5 questions of different types to the text (in writing). Text 13
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- •Make up 5 questions of different types to the text (in writing). Text 14
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- •Make up 5 questions of different types to the text (in writing). Text 15
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- •Make up 5 questions of different types to the text (in writing). Text 16
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- •Remote access
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- •File sharing
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- •Presence is Here Today
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- •Improving the Effectiveness of Business Communications
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- •Telephone
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- •Computer Viruses
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- •The beginning of electric telegraphy
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- •System Board
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- •Electricity
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- •Types of viruses
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- •Personal Computer (pc)
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- •International Telegraph Union (itu)
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Text 1
Read and translate the text in writing.
There are two main types of computer or programming languages - low level and high level. Low level languages can be further subdivided into machine code and assembly languages.
Any computer is designed to understand only one language and this is called its machine code or machine language. When the machine code instructions are in the central memory of the computer, they will be in a numeral form, in certain binary patterns, since this is the natural number system of digital computers. To write instructions in decimal numbers is difficult enough because we must remember all the time which number means which operation. Since people prefer to use words, a new type of the language based on the machine code was developed. It uses letters instead of decimal numbers to represent computer operations, e.g. 01 means ADD, 02 - SUBTRACT. However, "subtract" is a long word, so a shorthand form was used, namely, SUB. Both ADD and SUB are symbolic names which represent addition and subtraction operations of a computer. These mnemonic type languages are known as assembly level languages.
Both machine and assembly language are called "low level". The term "low" does not mean "inferior", but rather "closeness" to the way in which the machine has been built. A typical low level instruction consists essentially of two parts: a function part (i.e., do some activity) and an address part (i.e. use the contents of an address location). The number of bits in the function part will determine the number of possible unique instructions a computer can execute. The number of bits for the address part must complete the overall size of the central memory.
One disadvantage with a low level language is that because of the simple instruction format it takes many instructions to perform even not a difficult task. Thus, writing a low level program can be a lengthy business. For this reason another class of language was developed. Algol, Fortran, Basic, Pascal, C, PL/I are such examples. These languages are called high level languages. The term "high" means oriented towards the problem rather than towards the structure of the machine.
Analyze grammar in the underlined words and word combinations (in writing).
Make up 5 questions of different types to the text (in writing). Text 2
Read and translate the text in writing. Colour television
Colour television is the transmission and reception of images in the full colour. The colour television system can produce programs both in colour on colour receivers and in black and white on monochrome receivers. Also, colour receivers receive monochrome pictures when they are being transmitted.
Colour transmission contains two basic components – brightness information and colour information.
Red, green and blue are the colours that are chosen for colour television.
In a colour camera an optical system separates the red, green, and blue image components of a picture and concentrates these three components in separate but identical colour camera tubes.
Thus, the output of one tube reacts to the red light image, another – to the green, and another – to the blue light image.
In a monochrome kinescope a single electron gun produces an electron beam. The brightness is controlled by an electron grid, which changes the electron beam density.
In a colour kinescope three electron guns produce three electron beams which are synchronized. The intensities of the beam are controlled by the voltage corresponding to the green, red and blue components respectively of the colour picture.
In a colour receiver the incoming signal goes through frequency and amplitude selective circuits. In these circuits the brightness component, the colour component and the horizontal and vertical beam-synchronizing components are separated. The brightness component is applied simultaneously to each of the three electron guns. The red, green and blue colour signal voltage components are obtained and are applied to the three respective kinescope electron guns. They combine with the brightness components voltage to produce beam intensities which reproduce the original picture.