Keyphrases
- user interests
- user profiles
- user profiling
- information filtering
- collaborative filtering
- concept hierarchy
- user behavior
- user model
- user preferences
- personalized recommendation
- user generated
- user modeling
- recommender systems
- personalized search
- web personalization
- user feedback
- web content
- hierarchical structure
- news items
- user queries
- individual user
- personalized web search