1. J. Berzosa, J. Mabe, N.J. Grabham, M.J. tudor This study is partially funded by European Union Seventh Framework Programme (FP7/2007-2013)

2. WSNs are easily integrated into different environments. Power Harvesting. Avoid the use of physical maintenance. Increase the life cycle virtually forever. Power Harvesting techniques build potentially self-sufficient devices/systems.

3. Not reliable energy source. Can affect the quality of the Pervasive Services. Non deterministic energy source. Not easily predictable and can not be foreseen. Uncertain quality of services. Difficult management of the energy resources can lead to service lost or unnecessary quality degradation. PH Implications Pervasive systems relay in a determined QoS.

4. No professional Administrator Integration of the System Adaptation of the Inhabitants Trust and Reliability As opposed to Workplaces or Lab environments Change of social behaviours Disruption of the home environment routine Fulfilment of user expectations

5. Natural Integration into the environment Pervasive Systems MUST effectively deliver Services to the everyday routines Power Harvesting Pervasive Systems MUST effectively integrate the Services AND the maintenance of the Services into everyday routines Users must be aware of: The Services are not infallible if no further care is taken. OR The Services are optional or auxiliary.

6. … is a solution for real time monitoring of building thermal conditions based on Self Powered Multi Magnitude WSNs.

7. Federated Network over an Unfederated space. Every single room is owned by a different person Each person must be convinced about: the technical solution the maintenance routines the necessity of a certain conditions

8. Test Deployment Future Deployment 22 apartments No specific instructions No immediate feedback Assumption of proper function Partial trust in the solution User Answer 70-80 apartments Maintenance instructions Immediate feedback Awareness of devices dependability on energy source Care for the device Trust in the solution Expected User Answer

9. What do current Power Harvesting techniques lack in order to be effectively applied to Pervasive Systems? Will user dependable technologies get acceptance into homes?