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Table 2 Different context propagation scenarios and the corresponding aggregation functions (see Table 1 for corresponding scenarios)

From: Radiator - efficient message propagation in context-aware systems

#

Scenario

Aggregation function

1

Traffic monitoring

avg(speed) by location

2

Road hazards detection

sum(hazards) by location

3

Popular spots

count(people) by location

4

Facebook likes

sum(likes) by object

5

Friends location in crowded spaces

list(people) by distance

6

Stock market alerts

newest(values) by share