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A Republican Example |
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In 1994 the U.S.-Republicans demonstrated how parties tend to manipulate people instead of standing for certain political thoughts: The Republican party contracted a consultant to find out the most-wanted topics of the U.S.-population, and afterwards the same consultant wrote a paper, called the Contract with America. Out of this, Republican Politicians all received a positive list of words they were told to use in speeches about themselves and a list of negative words for political competitors.
This kind of thought control plays with the issue that words with negative/positive connotations go deeper than neutral words. They get integrated into the listening person's way of thinking. Even if someone understands the strategy, it will still be difficult to forget the black-and-white-images, as soon as they have been listened to.
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Optical communication system by Aeneas Tacitus, 4th century B.C.
Aeneas Tacitus, a Greek military scientist and cryptographer, invented an optical communication system that combines water and beacon telegraphy. Torches indicated the beginnings and the ends of message transmissions while water jars were used to transmit the messages. These jars had a plugged standard-size hole drilled on the bottom side and were filled with water. As those who sent and those who received the message unplugged the jars simultaneously, the water drained out. Because the transmitted messages corresponded to water levels, the sender indicated by torch signal that the appropriate water level has been reached. It is a disadvantage that the possible messages are restricted to a given code, but as this system was mainly used for military purposes, this was offset by the advantage that it was almost impossible for outsiders to understand these messages unless they possessed the codebook.
With communication separated from transportation, the distant became near.
Tacitus' telegraph system was very fast and not excelled until  the end of the 18th century.
For further information see Joanne Chang & Anna Soellner, Decoding Device,  http://www.smith.edu/hsc/museum/ancient_inventions/decoder2.html
 http://www.smith.edu/hsc/museum/ancient_inven...
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