This paper describes RSM-WISP, a new management architecture designed for WISPs to facilitate the implementation and management of the services they offer at the access side of the WLAN, and to manage roaming contracts between WISPs. Our architecture is based upon the policy based management principles as introduced by the IETF, combined with more intelligence at the network edge. RSM-WISP adop...

We present a corpus of European Portuguese spoken by teenagers and adults in school context, CPE-FACES, with an overview of the differential characteristics of high school oral presentations and the challenges this data poses to automatic speech processing. The CPE-FACES corpus has been created with two main goals: to provide a resource for the study of prosodic patterns in both spontaneous and...

In this paper, we present a comparative study that focus on Supercapacitor (SC) thermal cycling and calendar ageing under constant voltage tests. The impacts of cycling temperature on SC performance and degradation rate are studied. Obtained results from thermal cycling ageing test are compared with those coming from simple calendar ageing test at constant voltage and constant temperature. The ...

This work aims at frequency synchronization in OFDM IEEE 802.11g Transceivers. The degradation of performance results from the detrimental effects introduced by frequency offset and phase noise. First, we present a robust method to detect and synchronize the OFDM signal with severe noise and interference corruption based on calculating the accumulated phase difference for each subcarrier. Then,...

Abstract Relaxor ferroelectrics exhibit both static and dynamic local structural order which controls their frequency-dependent electrical properties. A combination of advanced scattering microscopy techniques have been used recently to determine the structure relaxors. To complement these, here we show an approach property measurements identifies dipoles whose switching is co-operative, temper...