| 39990 |
Creator |
21e3abf33e3daaa89c07ea7d5da24bb0 |
| 39990 |
Creator |
ext-19d398ebccee80969366b4f8ef2844a7 |
| 39990 |
Creator |
ext-528eaa362c24830c4c072db4b7f4c342 |
| 39990 |
Date |
2013-11-20 |
| 39990 |
Is Part Of |
p00200255 |
| 39990 |
Is Part Of |
repository |
| 39990 |
abstract |
This work contributes to the development of ontology-based user models, devised as
overlays over conceptual hierarchies derived from domain ontologies. We tackle the
problem of propagation of user interests in such a conceptual hierarchy. In addition
to accounting for the hierarchical structure of the domain and the type and amount
of feedback provided by the user, the principal contributions introduced in this work
are: (i) <i>horizontal</i> propagation which enables propagation among siblings, in
addition to vertical propagation among ancestors and descendants; (ii) <i>anisotropic</i>
vertical propagation which permits user interests to be propagated differently upward
and downward; (iii) <i>context-dependance</i> which introduces the possibility to
propagate differently according to various contexts for specific applications; (iv)
<i>support for dynamic ontology maintenance</i>, i.e. preserving the user interest
values when adding or removing a node from the conceptual hierarchy. Our approach
supports finer recommendation modalities and contributes to the resolution of the
cold start problem, since it allows for propagation from a small number of initial
concepts to other related domain concepts by exploiting the conceptual hierarchy of
the domain. A field evaluation confirmed the effectiveness of our approach w.r.t.
the traditional vertical propagation. |
| 39990 |
authorList |
authors |
| 39990 |
status |
peerReviewed |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232098 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232099 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232100 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232101 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232102 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/232103 |
| 39990 |
uri |
http://data.open.ac.uk/oro/document/233439 |
| 39990 |
volume |
250 |
| 39990 |
type |
AcademicArticle |
| 39990 |
type |
Article |
| 39990 |
label |
Cena, Federica; Likavec, Silvia and Osborne, Francesco (2013). Anisotropic propagation
of user interests in ontology-based user models. Information Sciences, 250 pp. 40–60.
|
| 39990 |
label |
Cena, Federica; Likavec, Silvia and Osborne, Francesco (2013). Anisotropic propagation
of user interests in ontology-based user models. Information Sciences, 250 pp. 40–60. |
| 39990 |
Title |
Anisotropic propagation of user interests in ontology-based user models |
| 39990 |
in dataset |
oro |