1. COMMUNICATION TECHNOLOGY November 11, 2011
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COMMUNICATION TECHNOLOGY November 11, 2011
Are you smarter than an extraterrestrial space alien?
"In the deepest sense the search for extraterrestrial intelligence is a search for ourselves." - Carl Sagan

2. Binary Numbers Bits can be represented as: 1 or 0 On or Off Up or Down
Open or Closed
Yes or No
Black or White
Thick or Thin
Long or Short

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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 3

4. Talking to Aliens 2-2 In 1974 Scientists sent a deliberate message
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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 5

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This is the binary code sent from Arecibo observatory on 16 November 1974. ?

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Cryptography (or cryptology; from Greek κρυπτός, kryptos, "hidden, secret"; and γράφω, gráphō, "I write", or -λογία, -logia, respectively) is the practice and study of hiding information. Modern cryptography intersects the disciplines of mathematics, computer science, and engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce.

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The binary digits form a pattern of 41 columns by 41 rows, .. less two binary digits at the end.
There are a total of (41)(41) =1681 less 2 , or 1679 binary digits.
There are two ways to arrange the binary digits as a pattern of rows and column using prime numbers: a pattern of 23 rows deep by 73 columns wide, or a pattern of 73 rows deep by 23 columns wide.
Of the 1679 binary digits, there are 397 ‘ones’ and 1282 ‘zeros’.
1679 is the product of two prime numbers: 23 and 73.
397 is a prime number.

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There are two ways to arrange the binary digits as a pattern of rows and column using prime numbers: a pattern of 23 rows deep by 73 columns wide, or a pattern of 73 rows deep by 23 columns wide.

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"Here is how we count from one to ten. Here are five atoms that we think are interesting or important: hydrogen, carbon, nitrogen, oxygen and phosphorus. Here are some ways to put these atoms together that we think interesting or important - the molecules thymine, adenine, guanine and cytosine, and a chain composed of alternating sugars and phosphates. These molecular building blocks are put together to form a long molecule of DNA comprising about four billion links in the chain. The molecule is a double helix. In some way this molecule is important for the clumsy looking creature at the center of the message. That creature is 14 radio wavelengths or 5 feet 9.5 inches tall. There are about four billion of these creatures on the third plant from our star. There are nine planets altogether, four big ones toward the outside and one little one at the extremity. This message is brought to you courtesy of a radio telescope 2,430 wavelengths or 1,004 feet in diameter. Yours truly."