The evolution of the science of the chemistry of admixtures besides the integration of various mineral additions in granular mixtures has metamorphosed the field of the concrete material. Thus, the produced mixtures are directly affected by the chosen combination of additions of mineral and organic. The disorders of industrial experience have often been associated with the dosages and interactions between the various additions used. The proposed study investigates the impact of the combination of different types of mineral and organic additions on the rheological properties of mortars. In this research work, mortars were made by varying the rate of substitution of cement by three types of mineral additions (limestone fillers, marble powder, natural pozzolan), in association with different dosages of a 3rd generation superplasticizer (polycarboxylates ), in order to study the evolution of shear thresholds and viscosities. In addition, a coaxial vane-type rheometer is used to study the rheological characterization of the mortars. The obtained experimental results revealed the effectiveness of the incorporation of inert mineral additions combined with polycarboxylates on the rheological parameters

In this paper, we improve the TOE (Thermo-optic Efficiency) of SiN using SiOC as upper clad layer to simulate the waveguide and analyzed the refractive index by using MEEP/Beam-prop software for superior experimental results. In order to create photonic integrated circuits, a number of material platforms have been researched. (PICs). The semiconductors (Si, InP, GaAS) are not fulfil the complete requirement of photonics. So, we use dielectrics SiON, SiO2, SiN, and SiOC at 1550 nm become well-established platforms lowest losses possible, they suffer from relatively lower coefficient of themo-optic, about 10-5 / C. Silicon Nitride (SiN) has low TOC 2×10-5 / K and the recently silicon oxycarbide (SiOC) has been shown to highest TOC among the dielectrics 4 × 10-4 / K.

This paper presents an optimized advanced control technique for a grid-connected hybrid energy system (HES) based on a solid oxide fuel cell (SOFC) and a photovoltaic panel (PV) in a distributed power generation system. A classical full sliding mode control and a Fuzzy-PI sliding mode are proposed for a system operation and power management mode (UPC mode). The latter technique which is based on a combination of a classical controller and fuzzy artificial intelligence system is utilized at power and current adjustment stage. The fuzzy system gave the optimal gain values to the PI controller to get a better performance. The obtained results show that the optimized sliding mode control (Fuzzy-PI) is better than the classical sliding one in terms of power, response time, and robustness against disturbances in production and consumption energy.

The inhibition of the corrosion of X70 steel in aerated 3% NaCl solutions by cerium (III) nitrate hexahydrate has been studied using polarization method, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results indicated that the protection efficiency (%IE) rises with an increase in the concentration of Ce (III) and reached an optimal value of 72%. The results of EIS show that when the concentration of the inhibitor increases, both charge transfer resistance and inhibition efficiency tend to increase while the value of constant phase element, CPE, tends to decrease. SEM analysis was performed to study the persistence of the Ce(III) hydroxide layer.