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HUMAN COMPUTER INTERACTION - Coggle Diagram
HUMAN COMPUTER INTERACTION
Environment and bio-sensing
sensors all around us
car courtesy light – small switch on door
ultrasound detectors – security, washbasins
RFID security tags in shops
temperature, weight, location
even our own bodies
iris scanners, body temperature, heart rate, galvanic skin response, blink rate
Memory Capacity
Involves re-encoding and remembering
Human can not remember all the things - must be processed and managed
Context is very important in memory
Human easier to identify than recalls
Human easier to remember images than words
Short-term Memory - RAM
Random access memory (RAM)
on silicon chips
100 nano-second access time
usually volatile (lose information if power turned off)
data transferred at around 100 Mbytes/sec
:Some non-volatile RAM used to store basic set-up information
Typical desktop computers: 64 to 256 Mbytes RAM
Long-term Memory - disks
magnetic disks
floppy disks store around 1.4 Mbytes
hard disks typically 40 Gbytes to 100s of Gbytes access time ~10ms, transfer rate 100kbytes/s
optical disks
use lasers to read and sometimes write
more robust that magnetic media
CD-ROM - same technology as home audio, ~ 600 Gbytes
DVD - for AV applications, or very large files
Blurring boundaries
PDAs
often use RAM for their main memory
Flash-Memory
used in PDAs, cameras
silicon based but persistent
plug-in USB devices for data transfer
What is Mental Model?
the models people have of themselves, others, the environment, and the things with which they interact
Interaction Framework
System, user, input, output
input and output together form the interface
each of the components may have its own language to describe the objects and actions it is concerned with
Translations Between Components
articulation
performance
presentation
observation