نتایج جستجو برای: microstructural features
تعداد نتایج: 536869 فیلتر نتایج به سال:
For crystal plasticity formulation neglecting the strain gradients at dislocation scale, backstresses are necessary to satisfy mesoscopic stress equilibrium and compatibility requirements. Backstresses in a material point those between neighboring points treated separately. Physically can dynamically induce either hardening or softening effects adjust of slip systems, whereas sum stresses resul...
OPINION STATEMENT Cerebral small vessel disease (SVD) is characterised by damage to deep grey and white matter structures of the brain and is responsible for a diverse range of clinical problems that include stroke and dementia. In this review, we describe advances in neuroimaging published since January 2015, mainly with magnetic resonance imaging (MRI), that, in general, are improving quantif...
One of the most important attributes of diffusion NMR is that it can employ restricted diffusion to probe microstructures of opaque samples. The single-pulsed-field-gradient (s-PFG) methodology (Fig. 1A) employs a pair of diffusion-sensitizing PFGs that are separated by an interval in which the diffusion process takes place. When a specimen is characterized by a very narrow size distribution or...
the present study is an experimental case study which investigates the impacts, if any, of skopos on syntactic features of the target text. two test groups each consisting of 10 ma students translated a set of sentences selected from advertising texts in the operative and informative mode. the resulting target texts were then statistically analyzed in terms of the number of words, phrases, si...
•DTI can provide information on microstructural white matter integrity.•White matter microstructural integrity is not related to cognitive decline in SVD.•These results are in contrast with cross-sectional findings.•Other factors than white matter microstructural damage underlie this cognitive decline.
BACKGROUND Diffusion tensor imaging measures of white matter (WM) microstructural integrity appear to provide earlier indication of WM injury than WM hyperintensities; however, risk factors for poor WM microstructural integrity have not been established. Our study quantifies the association between vascular risk factors in midlife and late life with measures of late-life WM microstructural inte...
In this study different volume fractions of SiC particles of various sizes were introduced into the semisolid A356 aluminum alloy by a mechanical stirrer. Then the slurry was poured into a permanent die of certain dimensions either when the metal alloy was partially solid (semisolid-semisolid or SS route) or after reheating to above the liquidus temperature of the alloy (semisolid-liquid or SL ...
3D molecular dynamics simulations are performed to investigate the role of microstructural confinement on room temperature stress-driven grain boundary (GB) motion for a general population of GBs in nanocrystalline Al thin films. Detailed analysis and comparison with experimental results reveal how coupled GB migration and GB sliding are manifested in realistic nanoscale networks of GBs. The pr...
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