Transcript 2-4 IOT

Communication Technology
Quiz Tomorrow
• Classifying as Human to Human, Human to
Machine, etc.
• Goals (6), inputs (1), processes (6), outputs
(1), feedback (varies)
• Radio and telephone operation
• Sine wave modulation types: PM, AM, FM
• Terminology:
– Information, knowledge, data, etc.
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Homework - REMINDER
LETTER THIS ASSIGNMENT
– Assignment should be set up similar to our example.
1. Classify the following as
1 Info
sheet
required
for each of the
– Also,
include
a labeled
diagram.
required 6 communication technologies:
2.
Radio, T.V., Cell Phone, Internet, GPS, Remote
Radio,
ControlT.V., Cell Phone, Internet, GPS, Remote
Control
3. Do
Explain
not your
leaveclassification.
any question in reader’s mind
4. Analyze the components of each of those 6
communication
technologies,
including the goal,
DUE
FRIDAY 10/3
source, encoder, transmitter, receiver, decoder,
storage, retrieval, and destination.
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Classes of Communication Technology
– Print Graphic Communication
Visual, lingual messages that include printed media
– Photographic Communication
Using photographs, slides, or motion pictures to
communicate a message
– Telecommunications
Communicating over a distance
– Technical Graphic Communication
Specific information about a product or its parts
Size and shape, how to install, adjust, operate, maintain,
or assemble a device
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Classes of Communication Technology
1. Print Graphic Communication
Newspaper, poster, brochure, billboard
2. Photographic Communication
Photographs, slides, motion pictures
3. Telecommunication
Radio and t.v. broadcasts, computers, mobile and satellite
4. Technical Graphic Communication
Engineering drawings (sketches, drafting, CAD)
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Matching Classes
1.
2.
3.
4.
Print Graphic Communication
Photographic Communication
Telecommunications
Technical Graphic Communication
3
1
2,3
2,3
1
2
1
Telephone
Book
Videotape
DVD
Magazine
Photograph
Newspaper
3 Headphones
3 Computer
3 Remote Control
2 Painting
Camera
2
1,2 Comic Strip
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1,2 Billboard
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Print Graphic Communication
Communication Technology
– Major Processes:
• Relief
2. The plate is covered in ink
Intaglio
– A modeled work that is raised (or lowered) from a flat
background.
By
593 A.D., the first printing press was invented in
(in-tal-yo)
– Cuneiform by the Sumerians
~6000
years ago.
3. Excess ink
is removed
from surface
China, and the first printed newspaper was available
– Wood block printing ~200 C.E.
in Beijing in 700 A.D. It was a woodblock printing. And
– Movable type printing ~1040 C.E. (Gutenberg ~1450)
the Diamond Sutra, the earliest known complete
– Intaglio (in-tal-yo) ~1430
woodblock
printed book with illustrations
was printed
4. Paper placed
on plate and
–
Rotary
printing
press
~1843
in China in 868 A.D. And Chinese printer
Bi Sheng
compressed
• Lithography
printing)
~1796
invented
movable(offset
type in
1041 A.D.
in China.
– The source and destination are not on raised surfaces
5. Paper
is removed
and ink has been transferred
– Grease
and water
do not
readily mix
1. Depressions
cut into
Low
Relief
Cuneiform
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printing
– plate
A chemical process High Relief
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– Most modern books and newspapers
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Communication Technology
Print Graphic Communication
• Screen Printing (~1000 C.E., China; 1907 England)
– Mainly billboards, package labels, fabric designs
– Uses a woven mesh (a screen) to support an ink
blocking stencil.
– The stencil forms open areas of mesh that transfer ink
as a sharp-edged image onto a substrate.
– A roller or squeegee is moved across the screen stencil
forcing or pumping ink past the threads of the woven
mesh in the open areas.
• Electrostatic (1938 / 1960s)
– Photocopier, Laser Printer
– Opposite charges attract
• Ink Jet (1980s)
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– Use a series of nozzles to spray ink directly on paper
Photographic Communication
Communication Technology
• Photographic Communication
– The process of using photographs to communicate a
message
– Photography – capturing light on a light-sensitive
material such as film or electronic sensor
– As a usable process, 1820s
– Includes photographs, slides, and motion pictures
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Communication Technology
• Telecommunication
Telecommunications
– Communicating over a distance
Tele – Greek, “far off”
Communicare – Latin, “to share”
– Rely on the principles of electricity and magnetism
– 2 types:
• Hardwired systems (telephone, cable, fiber-optic)
• Broadcast systems (radio and t.v., mobile phones)
– Point-to-point:
• One transmitter and one receiver
– Broadcast:
• One powerful transmitter to numerous receivers
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Communication Technology
Telecommunications
– Smoke signals and drums
– Chains of beacons (Middle Ages)
• Navigation signals
• Enemy troops approaching
– Homing pigeons
• Carrier pigeons used as early as 1150 in Baghdad
• Olympic victors, Greece; Stock options, Europe
– Optical telegraph (semaphore, 1792, France)
• Towers with pivoting shutters
• Information encoded by the position of the
mechanical elements
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Communication Technology
Telecommunications
– Telegraph (mid 1830s)
• First instrument used to send messages by means of wires
and electric current
• A device interrupts the flow of a current through a wire
• Uses shorter and longer bursts of current to represent
letters
• Device at receiving end converted electrical signal into
clicks
• Operator/mechanical printer converted clicks into words
• Telegram – wires over land
• Cable – wires under water
– Telephone (1876 – Bell and Gray)
• Greek: tele – far, phone – sound
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Telecommunications
Play Morse Code Video
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Communication Technology
Telecommunications
– Broadcast
• Radio (1893 – Tesla, 1901 – Marconi)
• Television (1925)
– Greek: tele – far, Latin: visio – seeing
– 4 main parts (cathode ray tube)
– Electron gun fires 3 beams
– Steering coils move electron beam across screen
– Phosphorus screen has over 200,000 pixels
– Glass tube holds it all together
– Signals are broadcasted like radio signals
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Telecommunications
Communication Technology
– Computers
– Internet
– Cellular
– Local Area Networks
– Satellite Communication
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Technical Graphic Communication
Communication Technology
– Engineering Drawing / Technical Illustration
• Communicates specific information
– Size and shape
– How parts are assembled
– How to install, operate, adjust, maintain a device
• Hand methods
– Sketching
– Drafting
• Computer methods
– CAD (AutoCAD, Sketchup, Inventor, ProEngineer, etc.)
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Communication Technology
– Goals
Inform Persuade Entertain Control Manage Educate
GOALS
– Inputs
Source of Communication
–Control
Processes
FEEDBACK
Encoder Transmitter Receiver Decoder Storage Retrieval
– Outputs
PROCESSES
OUTPUTS
INPUTS
Message to the destination
Not always
– Feedback and Control
GOALS
Reversing the communication
line
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Communication Technology
Inform
Persuade
Entertain
Control Manage Educate
GOALS
SOURCE
Control
Input
Transmitted
INPUTS
Communication
TECHNOLOGY
FEEDBACK
Process
Encoder
Transmitter
Receiver
Decoder
GOALS
Storage
Retrieval
PROCESSES
DESTINATION
Output
Received
Communication
OUTPUTS
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Match the statements with the correct term below:
1. A device that changes a message into a form that can
be transmitted
2. A device that sends a signal (i.e., encoded message)
3. A device that acquires a signal (i.e., encoded message)
4. A device that changes a coded message into an
understandable form
Decoder
Receiver
Encoder
Data
Transmitter
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Communication Technology
Match the statements with the correct term below:
1.
2.
3.
4.
Unorganized facts
Organized data
Information applied to a task
The sending and receiving of information
Communication
Information
Knowledge
Storage
Data
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Communication Technology
Radio:
Encoder: Devices that convert sound and information into a
modulated sine wave
Pulse Modulation: turn the voltage (sine wave) on/off (Morse Code)
PM
Amplitude Modulation: vary the amplitude (peak-to-peak) voltage
AM
Frequency Modulation: vary the frequency (speed)
FM
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