The clinical diagnosis of transient ischemic attack (TIA) or minor stroke is highly subjective, especially if the brain imaging does not reveal any evidence of ischemic lesion. Herein, I report a case of small vessel TIA and another case of lacunar infarction in which the ischemic lesions were detected with the perfusion-weighted magnetic resonance imaging (MRI). A 76-year-old woman presented w...

Traditional kernel methods for estimating the spatially-varying density of points in a spatial point pattern may exhibit unrealistic artefacts, addition to familiar problems bias and over- or under-smoothing. Performance can be improved by using diffusion smoothing, which smoothing is heat on domain. This paper develops into practical statistical methodology two-dimensional data. We clarify adv...

We study the hydrogen mobility in ringwoodite and wadsleyite considering multiple charge-balanced defects, including Mg < = > 2H, Si < = >Mg+ 2H, and the hydrogarnet defect, Si < = > 4H, using molecular dynamics simulations based on the density functional theory at transition zone pressures and temperatures between 1500 and 2500 K. We determine the diffusion coefficients and study in detail the...