In the recent years, the Web has been rapidly “deepened” with the prevalence of databases online. On this deep Web, many sources are structured by providing structured query i...
Most sensors used for robot navigation fall into one of two broad categories: range sensors that give approximate distances to obstacles, and object-based sensors that detect and ...
The DynaQuest-Framework should reduce the effort for the creation of Internet-based virtual databases. These virtual databases are a special kind of federated database systems whe...
Estimation via sampling out of highly selective join queries is well known to be problematic, most notably in online aggregation. Without goal-directed sampling strategies, samples...
: User-defined data types such as intervals require specialized access methods to be efficiently searched and queried. As database implementors cannot provide appropriate index str...
Christoph Brochhaus, Jost Enderle, Achim Schlosser...