Spatial joins are join operations that involve spatial data types and operators. Spatial access methods are often used to speed up the computation of spatial joins. This paper addresses the issue of benchmarking spatial join operations. For this purpose, we first present a WWW-based benchmark...

This paper focuses on the challenges associated with composing and pricing web services. We present the results of an online experiment, where subjects were confronted with a variety of choices and decisions relating to web service markets and service composition. Our analysis shows that people...

Consumers need to feel they have control over the RFID infrastructure before they routinely trust its services.

RFID introduction is a hotly debated public policy issue. The technology enables physical environments to become more interactive and supportive by tagging each item with a chip that wirelessly communicates with a service-enriched backend infrastructure. Based on a number of user studies at...