Marwa Hachicha

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Self-adaptive systems adapt their own behavior autonomously in order to control the satisfaction of their requirements under changing environmental conditions. MAPE (Monitor, Analyze, Plan and Execute) control loops have been used as important models for realizing self-adaptation. Adaptive systems are generally more difficult to design, specify and verify(More)
— The Wireless Sensor Networks (WSNs) deployment introduces many issues and challenges mainly in terms of energy independence. In this context, we adopted a self-adaptation strategy composed of four steps (Monitor, Analyze, Plan and Execute) to manage Quality of Service (QoS) [1]. This paper focuses on the first step which consists in monitoring and sending(More)
Experimental gustatory curves have been fitted for four sugars (sucrose, fructose, glucose and maltitol), using a double layer adsorption model. Three parameters of the model are fitted, namely the number of molecules per site n, the maximum response RM and the concentration at half saturation C1/2. The behaviours of these parameters are discussed in(More)
Self-adaptive systems are able to manage themselves autonomously. A common approach to engineer these systems is to use the MAPE control loop based on these four steps: Monitoring, Analysis, Planning, and Execution. Existing research pays little attention to the modeling of self-adaptive systems with multiple MAPE control loops, and is lacking in(More)
In this work, statistical physics treatment was employed to study the adsorption of food dyes onto chitosan films, in order to obtain new physicochemical interpretations at molecular level. Experimental equilibrium curves were obtained for the adsorption of four dyes (FD&C red 2, FD&C yellow 5, FD&C blue 2, Acid Red 51) at different temperatures (298, 313(More)
New theoretical expressions to model the five adsorption isotherm types have been established. Using the grand canonical ensemble in statistical physics, we give an analytical expression to each of five physical adsorption isotherm types classified by Brunauer, Emett, and Teller, often called BET isotherms. The establishment of these expressions is based on(More)
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