TAILIEUCHUNG - Lecture Human computer interaction: Chapter 2 - Professor Dr. Sajjad Mohsin
After you have mastered the material in this chapter, you will be able to: A computer system comprises various elements, each of which affects the user of the system, input devices for interactive use, allowing text entry, drawing and selection from the screen, output display devices for interactive use, virtual reality systems and 3D visualization which have special interaction and display devices,. | HUMAN COMPUTER INTERACTION LECTURE 4 Professor Dr. Sajjad Mohsin 1 1A-2 chapter 2 the computer m 2 The Computer a computer system is made up of various elements each of these elements affects the interaction input devices – text entry and pointing output devices – screen (small&large), digital paper virtual reality – special interaction and display devices physical interaction – . sound, haptic, bio-sensing paper – as output (print) and input (scan) memory – RAM & permanent media, capacity & access processing – speed of processing, networks Interacting with computers to understand human–computer interaction need to understand computers! what goes in and out devices, paper, sensors, etc. what can it do? memory, processing, networks A ‘typical’ computer system screen, or monitor, on which there are windows keyboard mouse/trackpad variations desktop laptop PDA the devices dictate the styles of interaction that the system supports If we use different devices, then the interface will support a different style of interaction ? How many computers in your house? hands up, none, 1, 2 , 3, more!! computers in your pockets? are you thinking PC, laptop, PDA ?? How many computers in your house? PC TV, VCR, DVD, HiFi, cable/satellite TV microwave, cooker, washing machine central heating security system can you think of more? in your pockets? PDA phone, camera smart card, card with magnetic strip? electronic car key USB memory try your pockets and bags Interactivity? Long ago in a galaxy far away batch processing punched card stacks or large data files prepared long wait . line printer output and if it is not right Now most computing is interactive rapid feedback the user in control (most of the time) doing rather than thinking Is faster always better? Richer interaction sensors and devices everywhere text entry devices keyboards (QWERTY et al.) chord keyboards, phone pads handwriting, speech Keyboards Most common text input device Allows rapid entry .
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