BACKGROUND AND PURPOSE Cerebral ischemia leads to a rapid decrease of the apparent diffusion coefficient. For fractional anisotropy both increase and decrease have been reported in acute ischemic stroke. Aim of this study was to characterize early water diffusion changes in a homogenous group of acute stroke patients and to clarify the issue of early fractional anisotropy changes and their rela...

Surface temperature is a key variable in boundary-layer meteorology and is typically acquired by remote observation of emitted thermal radiation. However, the three-dimensional structure of cities complicates matters: uneven solar heating of urban facets produces an “effective anisotropy” of surface thermal emission at the neighbourhood scale. Remotely-sensed urban surface temperature varies wi...

In this study, a numerical examination of the significance of rotation and changeable gravitational field on the start of nanofluid convective movement in an anisotropic porous medium layer is shown. A model that accounts for the impact of Brownian diffusion and thermophoresis is used for nanofluid, while Darcy’s law is taken for the porous medium. The porous layer is subjected to uniform rotat...

We show that there is a new mechanism for nonmonotonous behavior of magnetic field dependence of the electronic thermal conductivity κ of clean superconductors with nodes of the order parameter on the Fermi surface. In particular, for unitary scatterers the nonmonotony of relaxation time takes place. Contribution from the intervortex space turns out to be essential for this effect even at low t...

An important predicted, but so far uncharacterized, property of the new superconductor MgB2 is electronic anisotropy arising from its layered crystal structure. Here we report on three c-axis oriented thin films, showing that the upper critical field anisotropy ratio H ‖ c2/H ⊥ c2 is 1.8 to 2.0, the ratio increasing with higher resistivity. Measurements of the magnetic field-temperature phase d...

First-principles density functional theory DFT calculations have been used to obtain the constitutive relationships of pentaerythritol tetranitrate PETN-I , a crystalline energetic material. The isotropic equation of state EOS for hydrostatic compression has been extended to include uniaxial compressions in the 100 , 010 , 001 , 110 , 101 , 011 , and 111 crystallographic directions up to a comp...