Publications by authors named "M Chafra"

The current research work examines the impact of Rare Earth (RE) ion substitution on the structural, optical and conduction properties of a BaCaRETiZrNbO (BCRETZN) (RE = Ce, Pr) ceramic compound produced a solid-state route. The Rietveld method of the X-ray data revealed a tetragonal (4) structure at room temperature for our ceramic compound. The morphology of the compound was explored using Scanning Electron Microscopy (SEM) as well as optical response and conduction behavior.

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The trans-tibial socket is an essential component of the prosthesis that connects it to the residual limb. Socket misalignments and permanent deformations reduce the comfort of the amputee. In order to forestall such issues, sufficient information about the socket lifespan needs to be acquired, which is fairly difficult given the lack of calculation methods that estimate the fatigue life in the literature.

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In this study, we report the effects of Ti on the critical behavior of LaBaCaMnO samples prepared by the flux method. Moreover, the critical exponents , and are estimated through numerous techniques such as the modified Arrott plot, the Kouvel-Fisher method and critical isotherm analysis of the magnetic measurements on record near the Curie temperature. Compared to standard models, the estimated critical exponents are close to the theoretical values of the mean-field model for these samples.

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The influence of Ti ions incorporated into the B site on the structural, vibrational and optical properties of LaBaCaMnTi O (LBCMT ), a polycrystalline compound prepared by a molten salt method, was discussed. The X-ray diffraction (XRD) studies confirmed that at room temperature these compounds crystallize in the rhombohedral phases of 3̄. Rietveld refinement indicated that the octahedron (Mn/Ti)O underwent a slight deformation and the bond angles decreased with the increase in the Ti content.

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Osteoarthritis is a globally common disease that imposes a considerable ongoing health and economic burden on the socioeconomic system. As more and more biomechanical factors have been explored, malalignment of the lower limb has been found to influence the load distribution across the articular surface of the knee joint substantially. In this work, a three-dimensional finite element analysis was carried out to investigate the effect of varying the high tibial osteotomy correction angle on the stress distribution in both compartments of the human knee joint.

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