Download Event Correlated Usage Mapping in an Embedded Linux System

Component
Card Reader
Input/Output
Swipe Invalid Card
Swipe Valid Card
Pin Code Reader
Enter Valid Pin Code
Enter Invalid Pin Code
Door Contact Switch
Door Open
Door Closed
Lock Relay
Door Locked
Door Unlocked
REX-button
Unlock door
Table 1: The Input and Output ports of PACS
to every process registered as a consumer that have subscribed to that kind of event.
An example is the process that controls the access rules, process A. A has subscribed
to the events generated by the process that checks what user is currently requesting
access, process B. When process A receives an event from B, a particular user is
requesting for access, process A knows that a database lookup must be made. An
event is created whenever the PACS gets some form of stimuli and all events created
are stored in an event logger. This logger was, however, not used during our work
since we did not want to affect the system more than we had to. Also, we wanted
something that was tailor made for our purpose in order to achieve the best possible
result.
Evaluating these events and the patterns that they are sent in is a crucial part in
this theses, which will be extensively covered in our evaluation section.
2.5
Data Mining
As the amount of information stored digitally from systems like shops, banks, social
media, websites and other computer systems is growing, the question of what this
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