Data information and knowledge
- Data:raw facts and figures
- Information: data which has been processed by the computer. It has context which makes it meaningful
- Knowledge: Knowledge is derived from information by applying rules to it.
Data: 80 Raw figure
Information: 80mph Has meaning and is in context
Knowledge: The speed limit is 60mph. You are breaking the law. Rule applied
gigo: if you put in incorrect data you get the wrong thing out.
DATA LOGGING: is the automatic recording of data as it is produced
Analogue sensors: measure variations
E.G. Air pressure, temperature, wind speed
Digital sensors: measure on/off statuses i.e a complete circuit broken
E.G. pressure pads, magnetic, switches