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The ab-initio computational techniques are
employed to extract the coupling between the electronic structure and magnetic
properties for a wide variety of transition metal oxides. Optimized crystalline
structures are computed by employing Hartree Fock (HF) and Density Functional
Theory (DFT) techniques. The hydrostatic pressure is employed upon the
optimized cubic crystalline structures of BaScO3, BaTiO3, BaVO3, BaCrO3, BaMnO3 and BaFeO3 to extract the coupling between the electronic structures and
magnetic properties originating due to electron spin polarizations.
We introduce an ultrasound elastography method for examining the ACL. It consisted of imaging the distal ACL while applying a drawer test and analyzing the resulting displacement and strain maps, where a map refers to how a variable is distributed spatially throughout an image. Our method was applied to healthy knees of cadaveric sheep to determine whether 1) our method can consistently generate displacements and strain maps in healthy ACLs; 2) displacement and strain maps are repeatable; and 3) healthy ACLs experience similar maps. We found that our method could consistently provide displacements and strain maps of the distal ACL region. Moreover, these ACLs experienced displacement and strain maps that were positively-correlated between trials, knees, and specimens. This correlation was statistically significant between pairs of trials and between left and right knees (p < 0.05). These results suggest that the maps are indeed repeatable and similar for healthy ACLs.
This paper aims to build a constitutive model intended to describe the thermomechanical behavior
of shape memory alloys. This behavior presents many facets, among them we have considered the simple way of shape memory, which is one of most important
properties of shape memory alloys. Because of numerous stages of this effect, the
subject was divided into three independent parts. For each part, we
built the corresponding thermodynamic potential and we deduced the constitutive
equations. To make this model workable, we have developed an algorithm. The simulation
was performed using the NiTi as shape memory alloy.
Many researches point out that intervertebral pressure and
transformation are key parameters for evaluating intervertebral
disc degeneration. Aiming at avoiding the damage caused by direct and indirect
measuring methods, this research proposes a cylindroid hypothesis and measuring
method, which can monitor the strain condition of the intervertebral disc in vivo and real-time without being