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Fig. 7.5
SERUM: The user profile after reading some articles
artists from article surrounding the clicked one are marked as less interesting. The
resulting user profile is shown in Fig. 7.5 .
The created profile is used to create the personalized news stream, shown in
Fig. 7.6 . The news is based on the user profile, which is a weighted profile and the
in Sect. 7.4 presented graph-based algorithm to enrich user profiles.
7.3 The User Behavior Model
After introducing our semantic tracking approach in the previous section and con-
cluding that for a fully semantic tracking approach also a semantic backend is needed,
in this section we introduce a new ontology-based model for the collection and man-
agement of user behavior data, the User Behavior Ontology (UBO) [ 27 ]. UBO serves
two main goals:
1. Defining a common data model, an ontology, to manage user behavior information
as described in the previous section: With UBO, data about user behavior can be
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