Post on 01-Nov-2014
description
Probleemoplossen & OntwerpenICT-werktuigen
Les 2
Erik DuvalDept. Computerwetenschappen
http://www.cs.kuleuven.ac.be/~erikd/
http://www.slideshare.net/erik.duval
2
3
H 26/9 inleiding, toledo, maple
Z 27/9 internet en wwww
H 3/10 systemen, gebruikers, web, virussen
Z 10/10 tekstverwerking en rekenblad
Z 17/10 samenwerking
H+Z 24/10 presentaties en rapportering, maple
week les zelfst oef12345678
woe x
woe ma-vr
x ma-vr
x ma-vr
woe pten!
x
ma-vr
pten!
Componenten van computersysteem
CPU
RAM
Besturings-
systeem Gebruiker
HardwareApplicaties
5
voorbeelden?
Hardware
6
voorbeelden?
Belangrijkste wet uit computerwetenschappen?
7
Moore’s law
• ‘the number of transistors that can be placed inexpensively on an integrated circuit has doubled approximately every two years’ (1965)
• ook
• processing speed
• memory capacity
• sensors
• network capacity
• ... 8
what does “exponential” mean?
if you fold a sheet of paper 50 times,then how thick is the result?
about the distance to the sun...
9
10
http://www.smartplanet.com/technology/blog/thinking-tech/physics-nobel-winners-launched-moores-law-of-optics/1689/
wiring the ENIAC with a new program
ENIAC1946Mauchly and Eckert
stats:3,000 cubic feet30 tons18,000 vacuum tubes70,000 resistors170 kilowatt power req.~1 kilobit memory
approximate processing power of today’s singing birthday card
but not a stored-program device
Great description here: www.computinghistorymuseum.org/teaching/lectures/pptlectures/7b-eniac.ppt
preparing punch cards
An important by-product: confetti. All the chaff from all those cards was just great to throw around the dorm.
preparing punch cards
Each key press punches holes, so there’s no “erase.” Fixing a mistake almost always required ejecting the card and starting it over.
In a pinch – say you really needed to fix a card and the punch was down – a clever operator might know enough about the card encoding to close some holes with tape and open others with a knife.
So on the one hand, we were adapting to the machines. On the other hand, the workings of the machines were exposed, right out where we could get to them.
punch cards
14
http://en.wikipedia.org/wiki/File:FortranCardPROJ039.agr.jpg
operator console
IBM System 3601960’s
next?
16
Command Line Interface
17
Nog vb?
18
Grafische gebruikersinterface
19
D. Engelbart, Augment
• Stanford Research Institute
• “Uitvinder” van muis, windows, groupware, ...
• team naar Xerox PARC
• nu: bootstrap institute
• http://www.bootstrap.org/
20
21http://www.youtube.com/watch?v=JfIgzSoTMOs
http://cfdj.sys-con.com/read/536976.htm
XEROX PARC Star (1981)
23
24 http://www.youtube.com/watch?v=G0FtgZNOD44
All 39 pages of advertising that Apple bought in a 1984 issue of newsweek are available here: http://www.aci.com.pl/mwichary/computerhistory/ads/macnewsweek
Windows 1.0 (1985)
26
next?
27
https://www.youtube.com/watch?v=9c6W4CCU9M4
http://blogs.msdn.com/tom/archive/2009/03/03/future-vision-ux-ideas.aspx
29
30
http://www.youtube.com/watch?v=6Cf7IL_eZ38
31
http://www.youtube.com/watch?v=CGwvZWyLiBU
33 http://www.youtube.com/watch?v=qCSSBEXBCbY&NR=1
“veiligheid”
37
https://admin.kuleuven.be/icts/info/pc-beveiliging/virus.html
38
https://admin.kuleuven.be/icts/info/pc-beveiliging/
39
http
://w
ww
.wir
ed.c
om/d
ange
rroo
m/2
011/
10/v
irus
-hits
-dro
ne-fl
eet/
sociale media?
hash tag
history
versnippering
51
scale
http://www.insidefacebook.com/2012/07/26/breakdown-of-facebook-user-growth-by-quarter-and-geography/
http://www.insidefacebook.com/2012/07/26/breakdown-of-facebook-user-growth-by-quarter-and-geography/
55
http://gizmodo.com/5813875/what-happens-in-60-seconds-on-the-internet
> 4.000.000/day> 6.000.000.000 total
facebook> 200.000.000/day
>100.000.000.000 total
download> 4.000.000.000 videos/day
upload48 hours video/min
who?
60
61
web:computing documents
http://en.wikipedia.org/wiki/File:PageRank-hi-res.png
social media:computing communication
http://www.myketech.com/tag/facebook-algorithm-update/
http://www.facebookstories.com/stories/1574/interactive-mapping-the-world-s-friendships#color=language-official&story=1&country=BE
68
http://www.youtube.com/watch?v=F7pYHN9iC9I
Fear
Uncertainty
Doubt
70
gewoon: proberen!
72
Questions?
http://erikduval.wordpress.com/twitter: @ErikDuval