Changes in the mechanical properties of soft tissues may be indicative of disease processes. Medical elastography techniques are an attempt to create images of the mechanical behavior to increase the sensitivity and specificity of existing imaging modalities. Current quantitative elasticity imaging methods rely on a priori assumptions of the tissue biomechanics in order to simply the forward pr...

We have developed a fully nonlocal model to describe the dynamic behavior of nematic liquid-crystal elastomers. The free energy, incorporating both elastic and nematic contributions, is a function of the material displacement vector and the orientational order parameter tensor. The free energy cost of spatial variations of these order parameters is taken into account through nonlocal interactio...

Introduction: Displacement ENcoding with Stimulated Echoes (DENSE) is a method to acquire myocardial displacement during the cardiac cycle. Spatial position is encoded and stored in the longitudinal magnetization at one point in time, and then read out later in the cardiac cycle, thus directly obtaining the displacement during that interval. The stimulated echo experiment results in a different...

An experimental technique to characterize irradiation-induced swelling, or isotropic volume expansion, through a combined utilization of medium-to-high energy accelerators and interferometric surface profilometry, was established. The technique was successfully applied to a characterization of swelling behavior in beta-silicon carbide arising from the accumulation of point defects at relatively...

Human analog tests of object permanence were administered to adult cats in order to assess as accurately as possible their developmental level in this particular cognitive capacity and to analyze their search behavior in situations in which an object has disappeared. Experiment 1 compared two groups, one that received the tests in their usual order of presentation and another that received firs...

Acupuncture needle manipulation has been previously shown to result in measurable changes in connective tissue architecture in animal experiments. In this study, we used a novel in vivo ultrasound (US)-based technique to quantify tissue displacement during acupuncture manipulation in humans. B-scan ultrasonic imaging was performed on the thighs of 12 human subjects at different stages of needle...

Domestic dogs (Canis familiaris) perform above chance on invisible displacement tasks despite showing few other signs of possessing the necessary representational abilities. Four experiments investigated how dogs find an object that has been hidden in 1 of 3 opaque boxes. Dogs passed the task under a variety of control conditions, but only if the device used to displace the object ended up adja...

The present work provides a simple and precise thermo-mechanical model for the prediction of stress distributions in adhesive joints. A displacement-based derivation is applied, using general sandwich-type overlap region. For layer linear displacement approach proposed, which captures variation shear stresses through-thickness direction. covers various joint configurations with linear-elastic m...

braced frames structures have a good lateral stiffness against earthquakes. however, energy loss of their members is slight and strong forces are given to the structures. moment frames have a more flexible function against earthquakes and also have a better flexibility than braced frames. however, since its lateral stiffness is low, too much displacement of the structure results in an increase ...

Having knowledge of stability of an underground space depends on stresses and strains around it. Creating underground tunnels leads to significant changes in the rock mass stress. Therefore, to achieve the necessary stability, stresses and deformations around the tunnel must be examined carefully. Usually, stress-strain behavior analysis is conducted in two-dimensional mode. This paper was cond...