763 search results - page 8 / 153 » Effective query formulation with multiple information source... |
SIGIR
2009
ACM
14 years 4 months ago
2009
ACM
Modeling term dependence has been shown to have a significant positive impact on retrieval. Current models, however, use sequential term dependencies, leading to an increased que...
MIDDLEWARE
2004
Springer
14 years 3 months ago
2004
Springer
The Internet provides a wealth of useful information in a vast number of dynamic information sources, but it is difficult to determine which sources are useful for a given query. ...
SIGIR
2009
ACM
14 years 4 months ago
2009
ACM
While query expansion techniques have been shown to improve retrieval performance in a centralized setting, they have not been well studied in a federated setting. In this paper, ...
VLDB
2005
ACM
14 years 10 months ago
2005
ACM
Abstract. We propose a mediator model for providing integrated and unified access to multiple taxonomy-based sources. Each source comprises a taxonomy and a database that indexes o...
ITICSE
2004
ACM
14 years 3 months ago
2004
ACM
This paper examines the effect of grading approaches for SQL query formulation on students’ learning strategies. The way that students are graded in a subject has a significant ...