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After confirming first whether there are sensed data or not, duration time of sensed
data will be calculated and after that, they are compared to Time Constraint of
detected objects. If Duration time is larger than Time Constraint, it is considered as
one did some meaningful works and on the contrary, if Duration is smaller than Time
Constraint, it is considered as no meaningful works. In the next, Duration of all
objects that did not satisfy Time Constraint is added all together and at this time, if
addition of Duration is larger than Threshold time, it is considered as they are in
lonely status.
Example of the rule for Case 1.2
<Rules>
<Imp Name="Lonliness-Case1.2">
<Head>
<Predicate propName="contextType">
<Variable>u</Variable>
<Value>alone</Value>
</Predicate>
</Head>
<Body operator="and">
<Predicate propName="hasStatus">
<Variable>u</Variable>
<Variable>s</Variable>
</Predicate>
<Predicate propName="durationOfObject">
<Variable>s</Variable>
<Variable>durO</Variable>
</Predicate>
<FunCall funcName="greaterThan">
<Variable>durO</Variable>
<Value>400</Value>
</FunCall>
</Body>
</Imp>
</Rules>
4.3 Case 2
Case 2 is a case in which one does only one thing continuously for a long time. To
find out this case, Time Constraint that can express the use of Object for too long time
is necessary. Even if Time Constraint for minimum time is fulfilled, if one uses that
Object for too long time, this can be considered as lonely situation. For example, in a
case of sitting on a chair for more than one hour, this satisfies Time Constraint of
minimum time using object mentioned in the above but one sits on a chair too long
than usual time. This is not a work and rather is considered as sitting absent-mindedly
and it will be considered as lonely situation. We need Time Constraint of maximum
time without being lonely while using object.
When the aged is doing one thing for too long time, it is considered as lonely and if
one continues previous works after using other Object without fulfilling minimum
Time Constraint momentarily while doing one thing continuously, these are no
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