Guest lecture Computer ScienceInternational School Hilversum

Guest Lecture Computer Science - ISH 2

Expectations

What do you want to take home today?

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Guest Lecture Computer Science - ISH 3

What I wanted to discuss

□ Compulsory introduction□ Who is a Computer Scientists?□ A practical example□ Practice!□ Tip for the PP□ Evaluation

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Guest Lecture Computer Science - ISH 4

Who am I?

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Guest Lecture Computer Science - ISH 5

Why am I here?

Because I think technology is awesome

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1700

1800

1900

2000

Renaissance

Industrial Revolution

Technological Revolution

Space Age

DigitalRevolution

Guest Lecture Computer Science - ISH 6

Why am I here?

Because I think technology is awesome

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Smartphones

Self-driving vehicles

Augmented Reality

Google Glass

Guest Lecture Computer Science - ISH 725/5/2014

It’s all possible because of computers and computer scientists

It’s all possible because of computers and computer scientists

Guest Lecture Computer Science - ISH 8

source: xkcd.org

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Guest Lecture Computer Science - ISH 9

WHO IS A COMPUTER SCIENTIST?

Computer Scientists vs “Normal” People

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Guest Lecture Computer Science - ISH 10

What a Biologist might seeView from the Uithof Utrecht Source: Google Streetview

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water

Abscission, deciduous

Young birch?

Homo sapiens sapiens

Fossil fuels

Old oak?

Contains cholorphyll

grass

Guest Lecture Computer Science - ISH 11

Here’s what I seeView from the Uithof Utrecht Source: Google Streetview

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Carries phone

Radio, ABS, navigation, gps, fare system, ...

Bus Information System

Automatic lamppost

NFC chips in OV-cards,

laptops

Guest Lecture Computer Science - ISH 12

WHO IS A COMPUTER SCIENTIST

Attributes

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Guest Lecture Computer Science - ISH 1325/5/2014

ComputerScientist = {

“attributes” : {“life_long_learner”,“puzzle_solver”,“loves_challenges”,“creative”,“team_player”,“lazy”,“efficient”

}

};

Guest Lecture Computer Science - ISH 14

LET’S HAVE AN EXAMPLEA Facebook problem

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Guest Lecture Computer Science - ISH 15

The problem

□ We’ve got this fantastic event we want to host

□ It’s open to anyone□ We want to invite all our friends to

this event

□ … but Facebook doesn’t have an ‘invite all’ option

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Guest Lecture Computer Science - ISH 16

The problem

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Guest Lecture Computer Science - ISH 17

The solutionelements = document.getElementsByName(“checkableitems[]”);

for (i = 0; i < elements.length; i++){

if(elements[i].type = “checkbox”){

elements[i].click();}

}

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Guest Lecture Computer Science - ISH 1825/5/2014

https://www.youtube.com/watch?v=1jAJQKjOA-U

Guest Lecture Computer Science - ISH 19

TIME TO GET OUR HANDS DIRTY

(not physically, depending on how clean you keep your keyboards)

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Please type this URL in your browser:

http://www.codeacademy.com/tracks/python

Follow the puzzles there

If you have any questions, ask!

Guest Lecture Computer Science - ISH 21

A TIP FOR YOUR PERSONAL PROJECT

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Guest Lecture Computer Science - ISH 22

Computer science is all about attitude

□ Don’t do things manually! Make it a puzzle instead

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Thanks for listening to this presentation!

I’d really appreciate it if you’d help me give better presentations by giving

feedback

Please go to: www.stijnhoogervorst.nl/ish/

feedback.html

Guest Lecture Computer Science - ISH 2425/5/2014

If you’re interested in learning more, you can find more resources here:

http://www.codeacademy.comhttp://www.learnstreet.com

http://code.org/learn (starts off a bit easy)http://www.programmingbasics.org/en/

And these slides are at:www.stijnhoogervorst.nl/ish/presentation.pptx

Guest Lecture Computer Science - ISH 25

TRIVIA

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1) What does RAM mean?Random Access Memory

2) Why does your computer become slower when there are a lot of programs open?

When your RAM is full, instead of from the fast memory, your processor has to load instructions from the hard drive which is slower

3) Another word for location in memory (RAM) isa) Indexb) Addressc) URL

4) How many bits are there in a byte?8 bits in a byte