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DRILL October 11, 2010

LIST THE FOUR CATEGORIES OF COMMUNICATION (Example Human to Human) AND GIVE AN EXAMPLE of EACH

Bookwork Problems

Pass in assignment on the soda problem assigned last Wednesday

Define the key terms on page 372. Answer the 15 “Test your Knowledge” Questions on page 372. This is classwork that will turned in.

This is a silent, individual assignment. Talking will result in serving after school detention.

1)Estimate how much soda the American population drinks in a year

2)If a can of Coca-Cola is 150 calories and there are 3,500 calories in a pound of body mass, what is the average weight gain of an American in a calendar year due to drinking soda?

Soda Problem 1

• I would estimate on average Americans drink one cans of coke everyday. Some drink more than two, some drink none but a reasonable average is 1 can/day

• 20 billion gallons of soda every year• Actual answer is 15 billion

StatesUnited

people

cups

gallon

can

cups

year

days

everydayperson

sodacan 610*300*

8

1*

1

5.1*

365*

1

Soda Problem 2

• If the average American drinks 1 can of soda per day

• 16 lbs per year

calories

lb

can

calories

year

days

day

sodacan

3500

1*

150*

365*

1

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Types of Communication Technologies

Printed Graphic Communication:Photographic Communication:TelecommunicationTechnical Graphic Communication:

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– Goals Inform Persuade Entertain Control Manage Educate

– Inputs Source of Communication

– Processes (in this order)Encoder Transmitter Receiver Decoder Storage Retrieval

– OutputsMessage to the destination

– Feedback and ControlReversing the communication line

Communication Technology

Not always

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ASSIGNMENT 2Example Follows

LETTER THIS ASSIGNMENT

Radio, T.V., Cell Phone, Internet, GPS, Remote Control

For the 6 above technologies analyze the components (the goal, source, encoder, transmitter, receiver, decoder, storage, retrieval, and destination). You will need to research the devices in order to complete this assignment. Provide references.

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Radio:Goal: Inform Persuade Entertain Control Manage Educate

Source: Sounds and Information

Encoder: Devices convert sound and info into modulated sine waves

Transmitter: Antennas radiate the radio waves into air (medium)

Receiver: Antennas capture the radio waves from air

Decoder: Devices convert radio waves back into sounds and data

[Storage: Recording devices store sounds and data for playback]

[Retrieval: Stored data can be accessed and played]

Destination: Consumers’ ears and eyes

ASSIGNMENT 2 – Example

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• Encoder– A device that changes a message into a form that can

be transmitted• Transmitter

– A device that sends a signal (i.e., encoded message)• Receiver

– A device that acquires a signal (i.e., encoded message)• Decoder

– A device that changes a coded message into an understandable form

Communication Technology

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Communication TechnologyTin Can Telephone

• Encoder-1st tin can– Sound energy is converted to mechanical energy

• Transmitter – wire between strings– Mechanical energy is transferred to second can

• Receiver – 2nd tin can– Mechanical energy of wire is converted to vibrations of tin can.

• Decoder – 2nd tin can– Vibrations of second tin is converted into sound energy.

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Communication TechnologyLandline Telephones

• Encoder-Microphone in first handset• Transmitter – Copper wires to central location and then to

destination• Receiver – 2nd telephone• Decoder – Speaker in second handset

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Communication TechnologyCellular Telephones

• Encoder-Microphone in first handset

• Transmitter – 1st telephone sends radio signal to cellular tower. Tower sends radio signal to 2nd telephone

• Receiver – 2nd cell phone• Decoder – Speaker in second

handset

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Communication TechnologyTransmission of Radio Signal

Sine wave contains no information. We need to modulate (vary) it.

Problem:

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Communication TechnologyTransmission of Radio Signal

Voice Patterns

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Pulse Modulation: turn the voltage (sine wave) on/off (Morse Code)

Amplitude Modulation: vary the amplitude (peak-to-peak) voltage

Frequency Modulation: vary the frequency (speed)

PM

AM

FM

YOU NEED TO KNOW THESE

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Digital vs Analog

Analog Digital

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Digital vs Analog

• Advantages of digital– Store large amounts of

information– Retrieve large amounts

of information

• Disadvantages of digital– Lose information– Can only store using

binary numbers• On/Off

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Morse Code Communication

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Listening to Aliens

We are looking at aliens by examining electromagnetic spectrum

Scientists use radio telescopes to analyze if any messages seem to be unnatural

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Talking to Aliens

• In 1974 Scientists sent a deliberate message– 25,000 light years away– 1679 bits of information

• 23 columns• 78 rows

– Frequency of 2380 MHz– 10 bits/second

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The Message00000010101010000000000001010000010100000001001000100010001001011001010101010101010100100100000000000000000000000000000000000001100000000000000000001101000000000000000000011010000000000000000001010100000000000000000011111000000000000000000000000000000001100001110001100001100010000000000000110010000110100011000110000110101111101111101111101111100000000000000000000000000100000000000000000100000000000000000000000000001000000000000000001111110000000000000111110000000000000000000000011000011000011100011000100000001000000000100001101000011000111001101011111011111011111011111000000000000000000000000001000000110000000001000000000001100000000000000010000011000000000011111100000110000001111100000000001100000000000001000000001000000001000001000000110000000100000001100001100000010000000000110001000011000000000000000110011000000000000011000100001100000000011000011000000100000001000000100000000100000100000001100000000100010000000011000000001000100000000010000000100000100000001000000010000000100000000000011000000000110000000011000000000100011101011000000000001000000010000000000000010000011111000000000000100001011101001011011000000100111001001111111011100001110000011011100000000010100000111011001000000101000001111110010000001010000011000000100000110110000000000000000000000000000000000011100000100000000000000111010100010101010101001110000000001010101000000000000000010100000000000000111110000000000000000111111111000000000000111000000011100000000011000000000001100000001101000000000101100000110011000000011001100001000101000001010001000010001001000100100010000000010001010001000000000000100001000010000000000001000000000100

000000000000100101000000000001111001111101001111000

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Message to AliensNumbers from 1 to 10

Atomic Numbers for Hydrogen, Carbon, Nitrogen, Oxygen, and Phosphorous

DNA Bases and Sugars

DNA Structure

Picture of man and population of earth

Solar System

Arecibo Telescope