According to the sounding rocket experiment conducted at Hainan ionospheric observatory (19.5 N, 109.1 E), a valley between the E layer and F layer in the ionospheric electron density profile is observed and presented. The sounding rocket was launched in the morning (06:15 LT) on 7 May 2011, and the observed electron density profile outside the valley agrees with the simultaneous observation by...

A numerical model has been used to characterize the development of a region of 6 enhanced cooling, in an alpine valley with a width of order 10 km, under decoupled stable 7 conditions. The region of enhanced cooling develops largely as a region of relatively dry 8 air that partitions the valley atmosphere dynamics into two volumes, with air flows partially 9 trapped within the valley by a devel...

We present a theoretical study of the Pauli or spin-valley blockade for double quantum dots in semiconducting carbon nanotubes. In our model, we take into account the following characteristic features of carbon nanotubes: i fourfold spin and valley degeneracy of the quantum-dot levels, ii the intrinsic spin-orbit interaction which is enhanced by the tube curvature, and iii valley mixing due to ...

The tree-layout problem is to compute the coordinates of nodes of a tree so that the tree, when drawn on a piece of paper, appeals to human understanding. The tree-layout problem, which seems inherently sequential at the first glance, can be solved by a data-parallel algorithm. It takes O (height * log width ) time on width pro33333333333333333333333333333 This work was supported in part by Nat...

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