Keyphrases
- virtual world
- virtual environment
- multi user
- database
- virtual reality
- query processing
- mixed reality
- physical world
- virtual learning environments
- social context
- response time
- query expansion
- query formulation
- relevance feedback
- data sources
- virtual communities
- user queries
- virtual agents
- immersive environments
- query evaluation
- user interaction
- range queries
- keywords
- search queries
- computer graphics
- intelligent environments
- query language
- e learning
- virtual objects
- search engine