Many RDF repositories have already been implemented with various access languages and mechanisms. The aim of the EDUTELLA framework is to allow communication between different RDF repository implementations. Part of EDUTELLA is a Query Exchange Language (QEL) which can be used as lingua franca to retrieve information from RDF repositories. This work shows why we also need standardization of dis...

In this paper, we study the exact controllability of a system of weakly coupled wave equations with an internal locally control acted on only one equation. Using a piecewise multiplier method, we show that, for a sufficiently large time T , the observation of the velocity of the first component of the solution on a neighborhood of a part of the boundary allows us to get back a weakened energy o...

As part of health sector reform, most developing countries are in the process of standardizing and integrating various vertical reporting systems. Nevertheless, the pressure resulting from the vertical systems supported by donors renders the integration goal challenging and unachievable. While studies have argued for the heterogeneity of interests and donors’ multiple needs as the major causes,...

We study synchronization of nonlinear systems that satisfy an incremental passivity property. We consider the case where the control input is subject to a class of disturbances, including constant and sinusoidal disturbances with unknown phases and magnitudes and known frequencies. We design a distributed control law that recovers the synchronization of the nonlinear systems in the presence of ...

Many real-world systems contain uncertainties and with time-varying delays, also, they have become larger and more complicated. Hence, a new decentralized variable structure control law is proposed for a class of uncertain large-scale system with time varying delay in the interconnection and time varying unmatched uncertainties in the state matrix. The proposed decentralized control law for the...