Вопрос № 606966 - Английский язык

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The study of communication process has led to a new discipline, known as "communication theory". The human elements in any communication process are a message source, a message medium and a receiver. This simplest case might be one person talking to another. The person talking is the transmitter or message source, air is the separating message medium, and the listener is the receiver. To communicate, information of some sort must be transferred. "Information" in communication theory is defined as any organized signal. It can be a series of letters, a series of picture scanning elements, etc.

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A communication system that does not allow an interchange between the message source and the receiver is said to be a one-way or "simplex" communication setup. One that does allow an interchange is a two-way or "duplex" setup. Noise is an important concept in communication theory. Noise is defined in communication theory as any signal that interferes with the message being sent and is an undesired disturbance in a communication system. Radio static is a form of noise. Dirt on a camera lens is noise also.

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A communication system that does not allow an interchange between the message source and the receiver is said to be a one-way or "simplex" communication setup. One that does allow an interchange is a two-way or "duplex" setup. Noise is an important concept in communication theory. Noise is defined in communication theory as any signal that interferes with the message being sent and is an undesired disturbance in a communication system. Radio static is a form of noise. Dirt on a camera lens is noise also.

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Unlike digital computers - which started out as mechanical devices and then went through a brief electromechanical period during the 1930s, finally becoming electronic only in the 1940s - television was an electrical medium from the very beginnings.
Attempts to send images over distances with the use of electricity date to 1876, the year Alexander Graham Bell invented the telephone.

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To determine blood groups, there is a method of extracting a chemical from human blood which, when mixed with a sample of the blood in question will react in a particular way according to the blood group. However, to get enough of the solution a great deal of human blood is required. But fortunately, snails’ eggs, which are the size of a pinhead, contain the same chemical – in fact, the blood of five donors would be required to supply the same amount of the chemical as is found one of the snail’s eggs.

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Before machines were invented, shoes like the ones we wear today took a long time to make. In 1846, Elias Howe made a strong sewing machine, and then, in 1858, Lyman Blake changed this machine so it could sew shoes. In 1875, Goodyear Welt made a new machine for making shoes quickly. It was called the Goodyear Welt sewing machine. With this machine Goodyear made cheap shoes from rubber. Nowadays we remember Goodyear because he has made other things with rubber.
Today, people wear shoes made from animal skins, cloth, rubber, and plastic. Shoes have come a long way from the first skin and leaf shoes – and with new machines, they will change a lot more.