captures the users’ preferences
Classification of concept
Users’ locations are used.
The user preferences are organized
The client - collects and stores locally
clickthrough data to protect privacy.
At server - concept extraction, training
Privacy issue – is taken care by restricting
the information in the user profile.
Existing system requires users to manually
enter the location preferences
Manually server retrieves a set of locations
User profile being exposed
queries are shorter , more
No privacy preservation
profiles both of the user’s
content and location preferences
user preferences are organized in
an ontology based, multi-facet order
locations positioned by GPS are
Avoids overlooking of unnecessary
Train the user profiles quickly and
Maintaining good ranking quality.
Improves retrieval effectiveness
exploit regular travel patterns and
query patterns from the GPS
Further enhancement of the