Transcript File - Precious Communication Tech 3104

History Of
Communication
Ancient, Classical and
Dark Ages
(500 000 B.C- 900 AD)
The Industrial Age(1800s)
The Information
Age(1960-Present)
The Modern Ages(1900-1960)
Middle Ages, Renaissance
and The Enlightenment
(900-1800)
Ancient, Classical and Dark Ages
(500 000 B.C- 900 AD)
The Invention of The Wheel
What is the Wheel?
• A wheel is a circular component that is intended to rotate on
an axial bearing. It is one of the main components needed for
the wheel and axle which is also part of the six simple
machines. Wheels allow heavy objects to be moved easily
allowing movement or transportation while supporting a
luggage, or performing labor in machines.
• Common examples are found in transport system. A wheel
greatly reduces friction by rolling together with the use of
axles. In order for wheels to rotate, a moment needs to be
applied to the wheel about its axis, either by way of gravity, or
by the application of another external force
When was the Wheel Invented
• As important as the wheel is as an invention, we don't know who exactly
made the first wheel. The question of which culture originally invented the
wheeled vehicle remains unresolved and under debate
Development of a Functional
Wheel
This is Heavy
The Sledge
Log Roller
Fixed Axles Make a Functional & Successful
Wheel
Inventing a Primitive
Axle
First Carts
This is Heavy
•
Humans realized that there was a way heavy objects could be moved easier if
something round, for example a fallen tree log, was placed under it and the object
rolled over it.
The Sledge
•
Humans also realized a way to move heavy objects, with an invention
archeologists call the sledge. Logs or sticks were placed under an object and used
to drag the heavy object, like a sled and a wedge put together.
Log Roller
•
Humans thought to use the round logs and a sledge together. They used several
logs or rollers in a row, dragging the sledge over one roller to the next.
Inventing a Primitive Axle
With time the sledges started to wear grooves into the rollers and humans noticed
that the grooved rollers actually worked better by carrying the object further. This
was simple physics, if the grooves had a smaller circumference than the unworn
parts of the roller which was dragging the sledge in the grooves required less
energy to create a turning motion but created a greater distance covered when the
larger part of the log roller turned. The log roller was becoming a wheel and
humans cut away the wood between the two inner grooves to create what is called
an axle.
First Carts
Wooden pegs were used to fix the sledge, so that when it rested on the rollers it would
not move but it still allowed the axle to turn in-between the pegs which led to the axle
and wheels creating all the movement. These were the first carts. Improvements to the
cart were made. The pegs were replaced with holes carved into the cart frame, the
axle was placed through the hole. This made it necessary that the larger wheels and
thinner axle had to be separate pieces. The wheels were attached to both sides of the
axle.
Fixed Axles Make a Functional & Successful
Wheel
Next, the fixed axle was invented, where the axle does not turn but is solidly attached
to the cart frame. Only the wheels did the revolving by being fitted onto the axle in a
way that allowed the wheels to rotate. Fixed axles made for stable carts that could turn
corners better. By this time the wheel was considered a complete invention.
How Wheels Changed the world
The wheel made the transportation of goods much faster and more efficient,
especially when it was fixed to horse-drawn chariots and carts. However, if it
had been used only for transportation, the wheel wouldn't have been as much
of a world-changer as it was. In fact, a lack of quality roads limited its
usefulness in this regard for thousands of years.
A wheel can be used for a lot of things other than sticking them on a cart to
carry grain, though. Tens of thousands of other inventions require wheels to
function, from water wheels that power mills to gears and cogs that allowed
even ancient cultures to create complex machines. Cranks and pulleys need
wheels to work. A huge amount of modern technology still depends on the
wheel, like centrifuges used in chemistry and medical research, electric motors
and combustion engines, jet engines, power plants and countless others.
Middle Ages, Renaissance and The
Enlightenment (900-1800)
The First Network of Communication
Towers
History of Telecommunication
Early telecommunications included smoke signals and drums. Talking drums
were used by natives in Africa, New Guinea and South America, and smoke
signals in North America and China. This was used to do more than merely
announce the presence of a military camp
UNTIL 1792
In 1792, a French engineer, Claude Chappe built the first visual telegraphy (or
semaphore) system between Lille and Paris. This was followed by a line from Strasbourg
to Paris. In 1794, a Swedish engineer, Abraham Edelcrantz built a quite different system
from Stockholm to Drottningholm. As opposed to Chappe's system which involved
pulleys rotating beams of wood, Edelcrantz's system relied only upon shutters and was
therefore faster.
Functions of Towers.
• Tower has changed the world because it can
be used for various different types of
Communication.
• It could be used for communication
Enhancement and Transport Support
Communication enhancement
•
In history, simple towers like lighthouses, bell towers, clock towers, signal towers and
minarets were used to communicate information over greater distances. In more recent
years, radio masts and cell phone towers facilitate communication by expanding the range of
the transmitter.
Transportation support
•Towers can also be used to support bridges, and can reach heights that rival some of the tallest
buildings above-water. Their use is most prevalent in suspension bridges and cable-stayed bridges.
The use of the pylon, a simple tower structure, has also helped to build railroad bridges, masstransit systems, and harbors.
•Control towers are used to give visibility to help direct aviation traffic.
The Industrial Age(1800s)
The Invention of Telephone
Invention of Telephone
•
A telephone, or phone, is a telecommunications device that permits
two or more users to conduct a conversation when they are not in the
same vicinity of each other to be heard directly. It converts sound,
typically and most efficiently the human voice, into electronic signals
suitable for transmission via cables or other transmission media over
long distances, and replays such signals simultaneously in audible form
to its user.
First patented in 1876 by Alexander Graham Bell
and further developed by many others, the
telephone was the first device in history that
enabled people to talk directly with each other
across large distances. Telephones rapidly became
indispensable to businesses, government, and
households, and are today some of the most widely
used small appliances.
How it Changed Communication
• It made communication between people because
people didn't have to be there physical but you
could still have a conversation with them.
• It made Communication much easier and cheaper.
The Modern Ages(1900-1960)
Invention of Television
Invention of Television
• Television, or TV for short, is a telecommunication medium for
transmitting and receiving moving images that can be monochrome
(black-and-white) or colored, with or without accompanying sound.
John Logie Baird was a British scientist of
Scottish nationality, engineer, innovator and
inventor of the world's first television;the
first publicly demonstrated colour television
system; and the first purely electronic colour
television picture tube.
There are three types of television:
•Electromechanical television
•Electronic television
•Color television
How Invention of Television Changed
Communication
• Television was a faster and easier method of spreading
information, entertainment, and advertising, than the
previous media such as newspapers and motion pictures.
• It also changed the way people talked in a positive way and a
negative way.
– Negative Way:
• Coarse Language is frequently used
• Jargon is said
• Sexiest Languauge
– Positive Way:
• Improved Vocabulary
The Information Age(1960-Present)
Sony Walkman
Sony Walkman
•
The Walkman was born because Sony's chairman, Akio Morita, wanted to listen to
opera music during his long, international flights. He saw a problem and an
opportunity to fill a gap in the market that would solve that problem. A company
called Stereobelt had already introduced the portable tape player, but it had not
been marketed successfully. The first prototype for the Walkman was finished in
1978. It took one year to complete the technology and get it ready for the market.
How Invention of Television Changed
Communication
• It caused less communication between people due to
the fact the other person is more focused on their
music so its is a limited one way conversation.
• It reduced learning though the initial plan was that it
will making learning easier.