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Vascular disease is a major cause of death, therefore it is desirable to develop robots and simulation tools for catheter trajectory evaluation. Until now trajectory completion duration, catheter tip location, wall deformation, morphology and stress applied to blood vessel phantom wall were identified as evaluation parameters during endovascular surgery simulation. For that purpose image processing...
Outlier due to false peak error (FPE) usually emerges during displacement estimation of ultrasound elastography, for which the performance of the resulted elastogram is degraded evidently. In this paper, a new method to remove the displacement outliers is proposed. The method is carried out in two steps, i.e., outlier detection and replacement. For the first step, the median of local displacement...
The research material presented in this paper is a continuation of work done in analyzing impact properties of a biomaterial found in a banana peel. Important energy absorbing characteristics, e.g., plateau stress, locking stress, deformation mode and crushing progression, collapsing mechanism, and crushing stroke of the foam filled (peel) structure are compared with the previously analyzed unfilled...
The flapping flight of butterfly is an example of Mobiligence in which the environment is the generated flowfield. Actually, it essentially has the same structure with other Mobiligence subjects, e.g., to emerge the flapping flight from the interaction of the nervous system, body, and environment. This research analyzes the mechanism to emerge the flapping flight of butterfly from this viewpoint....
Mechanical properties of two contrasting rice cultivars, P64S/E32 and SY63, were measured using 3-point bending tests performed on segments taken at the base and top of plant stems. The parameters of an elastic-plastic material constitutive law were fitted using a finite beam element model reproducing the 3-point bending tests. Both measured data and constitutive laws were compared between cultivars...
Today, children and adolescents are participating heavily in organized athletics year-round. Each year, approximately one third of these children will experience a serious injury requiring a doctor's or hospital visit. Physeal, or growth plate fractures, are one such type of overuse injury commonly seen in adolescents. At the knee joint, injuries in adolescents occur most often in the proximal region...
The mechanical characterization of cells is important in understanding cellular behavior. A micro-robotic system such as atomic force microscopy (AFM) can be adapted to measure the mechanical behaviors of cells due to its high spatial resolution and high sensitivity. AFM probing experiments on cells were performed with conical tips and sphere-particle-attached tips; the results were analyzed to characterize...
Finite element models are an innovative tool for the biomechanical analysis of dynamic cardiac structures, such as the mitral valve. Still, existing models are limited by a simplified description of valve morphology. We aimed at overcoming such limitation by integrating into a mitral valve structural finite element model the information about annulus and papillary muscles geometry and dynamics, obtained...
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