The Hydra project is co-funded by the 
Two papers from TUKE describes Hydra
The paper "Use of Semantic Technologies for Networked Embedded System Middleware" describes the project Hydra in details. The vision of the project, overall design objectives and scientific objectives are outlined.The other paper entitled "Network Embedded System Middleware for Ambient Intelligent Devices" was presented at the International Carpathian Control Conference ICCC' 2007, May 24-27 in Strbske Pleso in Slovakia. This paper also describes the Hydra project and the scientific objectives.
Download the two papers here.