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Codes, Computers & Instant Communication Amazing possibilities in science, engineering, and technology Developed for CWSE-ON © Melanie Veltman 2011.

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Presentation on theme: "Codes, Computers & Instant Communication Amazing possibilities in science, engineering, and technology Developed for CWSE-ON © Melanie Veltman 2011."— Presentation transcript:

1 Codes, Computers & Instant Communication Amazing possibilities in science, engineering, and technology Developed for CWSE-ON © Melanie Veltman 2011

2 Science, Engineering and Technology revolutionize the world we live in Image source: agevolazioni-ridotte-2011/17736/ Image Source: Image Source: content/uploads/cellphones.jpg Image Source:

3 What do scientists, engineers, and technologists do?

4 Build DesignTest

5 Image Source: /health/adam/19237.jpg Build DesignTest

6 Image Source: Image Source: 2006/projects/katarzyna/bioinformatics.jpg Image courtesy Bethany Deyell Image Source: ence-ebooks.jpg

7 Scientists, Engineers, and Technologists Image Source: orized/2007/07/27/frink.gif Image Source:northernbeaches webdesigns.com.au Image Source: Image Source: Source:

8 Many of us use computer science, engineering, and technology every day Every day things?

9 Codes, Computers & Instant Communication

10 Number Systems are Codes Decimal System Base choices: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Image Source:

11 Representing a Number with Base 10 – The Decimal System tens of thousands hundredstensones Remember- this number is a sum: 5 ten thousands + 2 thousands + 7 hundreds + 0 tens + 8 ones (5 x ) + (2 x 1000) + (7 x 100) + (0 x 10) + (8 x 1) =

12 Two Choice Number System What if we only had two choices? OFF or ON Image: Image: Image:

13 sixteenseightsfourstwosones This number is a sum: ( 1 sixteen + 0 eights + 1 four + 1 two + 0 ones) = 22 sixteenseightsfourstwosones Base 2 – the Binary System

14 sixteenseightsfourstwosones This number is a sum: ( 1 sixteen + 0 eights + 1 four + 1 two + 0 ones) = 22 sixteenseightsfourstwosones Base 2 – the Binary System

15 What about Text?

16 hi melanie! hi melanie! = a Standard based on 8 bits (a byte) Allows 256 unique codes, from ASCII Code for Text

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18 Representing Pictures in Binary Picture Elements arePIXELS

19 9 x 9 pixels How could we code this in binary ?

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21 So many pixels! Standard Photo: 1600 x 1200 = pixels ! MEGA Pixels ! We need to store image information in a more efficient code Image Source:

22 E ABCDEFG D AA F 1 0 E 0 E E 0 F 1 0 D 0 F 1 1 A D G A A G Ziv Lempel coding D

23 Binary code: 81 bits Ziv-Lempel code: 45 bits Close to 50% savings!

24 A B C D E F G H I J K L M N P Q R A B C D E F G H I J K L M N P Q R Chunk Size: 4

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27 Write the most efficient CODE Rows OR columns Any chunk size EFFICIENCY = fewest number of characters A B C D E F G H J Row 1: Row 2: 1 A E A 1 0 Row 3: Row 4: … A E A 1 1 0

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29 How do they work?

30 Might Science, Engineering, or Technology be for you? Image Source; SCIENCE If you don’t make mistakes, you’re doing it wrong.

31 If you … are creative Image Source:

32 … like problem solving Image Source:

33 … care about the future of our planet Image Source:

34 Admission Requirements College (Technology)  Applied OR Academic Level Science & Math Level Science & Math University (Science, Engineering)  Academic Level Science, Math, English Science, Math, English

35 NUMERACY is as important as LITERACY! Greater effort = greater results!

36 Thank you! What will you do with your future?


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