نتایج جستجو برای: displacements
تعداد نتایج: 12152 فیلتر نتایج به سال:
The objectives of this study were to figure out the prevalence of sideways disc displacement of the temporomandibular joint (TMJ) in symptom-free volunteers and to compare signal. The study was based on bilateral Magnetic Resonance Images (MRI) of 112 joints in 56 symptom-free volunteers. Sideways displacements were identified as medial disc displacement (MDD) and lateral disc displacement (LDD...
This paper looks at the control of mechanical impedance of the so-called G’ough-Stewart class of parallel platforms. Two methods of compliance control are presented. One is based on global potential energy functions that have previously been applied to controlling serial manipulators and electrodynamically levitated platforms. The second uses the exponential map to associate finite displacement...
This study aimed to determine the feasibility of using optical coherence elastography to measure internal displacements during the curing phase of a light-activated, resin-based composite material. Displacement vectors were spatially mapped over time within a commercial dental composite. Measurements revealed that the orientation of cure-induced displacement vectors varied spatially in a comple...
This study deals with a method to identify displacements on structures using a Microgenetic algorithm (M-GA). We developed the inverse technique using a Micro-genetic algorithm which can make global solution searches possible as opposed to classical gradientbased optimization techniques such as the Least-square method. The technique described in this paper may allow us not only to detect the ba...
A novel methodology to quantify displacements and strain in musculoskeletal ultrasound sequences is presented. We extend the principles of 2D interframe displacements produced by our earlier work using hierarchical variable block size matching, to quantify displacement trajectories. We provide novel solutions for probe motion, quantification of objects moving in the 3D volume traversing the 2D ...
We report on structural distortions in extreme-electron density (∼6×10(14) cm(-2)) confined quantum wells of SrTiO3 embedded in GdTiO3. Sr-column displacements are measured using high-angle annular dark-field imaging in scanning transmission electron microscopy. Using thick SrTiO3 layers as a reference, orthorhombic-like Sr-site displacements are observed when SrTiO3 quantum wells are thinner ...
We present the partial demonstration of displacementand laser-noise free interferometer (DFI) and the next experimental plan to examine the complete configuration. A part of the full implementation of DFI has been demonstrated to confirm the cancellation of beamsplitter displacements. The displacements were suppressed by about two orders of magnitude. The aim of the next experiment is to operat...
Although the political dimension of technological innovation is widely acknowledged, there remains a gap between empirical research into this politics and normative research into its democratic quality. Especially methods for evaluating the democratic quality of dynamic and non-formal forms of innovation politics are lacking. This paper develops a framework for analysing the politics of innovat...
This article reviews the mechanical bidomain model, a mathematical description how the extracellular matrix and intracellular cytoskeleton are coupled by integrin proteins. The fundamental hypothesis is that differences between intracellular and extracellular displacements drive mechanotransduction. A onedimensional example illustrates the model, which is then extended to two dimensions. In sev...
Objectives Diffusion weighted MRI measures molecular displacements by tagging spins phase according to their posthon, consequently, incoherent displacements cause dephasing, which results in a measurable signal attenuation. Usually, in clinical and biological applications, this incoherent motion is attributed to molecular diffusion (i.e., Brownian motion) within hindered and restricted domains....
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