PenO1: les 2

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PenO1: les 2

  1. 1. Probleemoplossen & OntwerpenICT-werktuigenLes 2 Erik Duval Dept. Computerwetenschappen http://www.cs.kuleuven.ac.be/~erikd/
  2. 2. http://www.slideshare.net/erik.duval 2
  3. 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 samenwerkingH+Z 24/10 presentaties en rapportering, maple 3
  4. 4. week les zelfst oef 1 woe x 2 woe ma-vr 3 x ma-vr 4 x ma-vr 5 woe pten! 6 x 7 ma-vr 8 pten!
  5. 5. Componenten van computersysteem Besturings- systeem CPU Gebruiker RAM ApplicatiesHardware voorbeelden? 5
  6. 6. Hardware voorbeelden? 6
  7. 7. Belangrijkste wet uit computerwetenschappen? 7
  8. 8. 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
  9. 9. 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. 10. http://www.smartplanet.com/technology/blog/thinking-tech/physics-nobel-winners-launched-moores-law-of-optics/1689/ 10
  11. 11. wiring the ENIAC with a new programENIAC1946Mauchly and Eckertstats:3,000 cubic feet30 tons18,000 vacuum tubes70,000 resistors170 kilowatt power req.~1 kilobit memoryapproximate processing power of today’ssinging birthday cardbut not a stored-program device Great description here: www.computinghistorymuseum.org/teaching/lectures/pptlectures/7b-eniac.ppt
  12. 12. preparing punch cardsAn important by-product:confetti. All the chaff from allthose cards was just great tothrow around the dorm.
  13. 13. preparing punch cardsEach key press punches holes,so there’s no “erase.” Fixing amistake almost always requiredejecting the card and starting itover.In a pinch – say you reallyneeded to fix a card and thepunch was down – a cleveroperator might know enoughabout the card encoding toclose some holes with tape andopen others with a knife.So on the one hand, we wereadapting to the machines. Onthe other hand, the workings ofthe machines were exposed,right out where we could get tothem.
  14. 14. punch cardshttp://en.wikipedia.org/wiki/File:FortranCardPROJ039.agr.jpg 14
  15. 15. operator consoleIBM System 3601960’s
  16. 16. next? 16
  17. 17. Command Line Interface 17
  18. 18. Nog vb? 18
  19. 19. Grafische gebruikersinterface 19
  20. 20. D. Engelbart, Augment• Stanford Research Institute• “Uitvinder” van muis, windows, groupware, ...• team naar Xerox PARC• nu: bootstrap institute • http://www.bootstrap.org/ 20
  21. 21. http://www.youtube.com/watch?v=JfIgzSoTMOs21
  22. 22. http://cfdj.sys-con.com/read/536976.htm
  23. 23. XEROX PARC Star (1981) 23
  24. 24. 24 http://www.youtube.com/watch?v=G0FtgZNOD44
  25. 25. 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
  26. 26. Windows 1.0 (1985) 26
  27. 27. next? 27
  28. 28. https://www.youtube.com/watch?v=9c6W4CCU9M4
  29. 29. http://blogs.msdn.com/tom/archive/2009/03/03/future-vision-ux-ideas.aspx 29
  30. 30. http://www.youtube.com/watch?v=6Cf7IL_eZ38 30
  31. 31. http://www.youtube.com/watch?v=CGwvZWyLiBU 31
  32. 32. 32 http://emotiv.com/
  33. 33. 33 http://www.youtube.com/watch?v=qCSSBEXBCbY&NR=1
  34. 34. “veiligheid”
  35. 35. https://admin.kuleuven.be/icts/info/pc-beveiliging/virus.html 37
  36. 36. https://admin.kuleuven.be/icts/info/pc-beveiliging/ 38
  37. 37. 39 http://www.wired.com/dangerroom/2011/10/virus-hits-drone-fleet/
  38. 38. sociale media?
  39. 39. hash tag
  40. 40. history
  41. 41. versnippering
  42. 42. 51
  43. 43. scale
  44. 44. http://www.insidefacebook.com/2012/07/26/breakdown-of-facebook-user-growth-by-quarter-and-geography/
  45. 45. http://www.insidefacebook.com/2012/07/26/breakdown-of-facebook-user-growth-by-quarter-and-geography/
  46. 46. http://gizmodo.com/5813875/what-happens-in-60-seconds-on-the-internet 55
  47. 47. > 4.000.000/day > 6.000.000.000 total facebook > 200.000.000/day>100.000.000.000 total
  48. 48. download> 4.000.000.000 videos/day upload 48 hours video/min
  49. 49. who?
  50. 50. 60
  51. 51. 61
  52. 52. web:computing documents
  53. 53. http://en.wikipedia.org/wiki/File:PageRank-hi-res.png
  54. 54. social media:computing communication
  55. 55. http://www.myketech.com/tag/facebook-algorithm-update/
  56. 56. http://www.facebookstories.com/stories/1574/interactive-mapping-the-world-s-friendships#color=language-official&story=1&country=BE
  57. 57. 68
  58. 58. http://www.youtube.com/watch?v=F7pYHN9iC9I
  59. 59. FearUncertaintyDoubt 70
  60. 60. gewoon: proberen!
  61. 61. Questions?http://erikduval.wordpress.com/ twitter: @ErikDuval 72

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