In this paper we propose a new junctions ridges and valleys detection method in images based on the difference of rotating Gaussian semi filters. The novelty of this approach resides in the mixing of ideas coming both from directional filters and DoG method. We obtain a new ridges/valleys junctions anisotropic DoG detector enabling very precise detection of ridge/valley junctions. Moreover, thi...

An oscillation with a period of around 500 kb in guanine and cytosine content (GC%) is observed in the DNA sequence of human chromosome 21. This oscillation is localized in the rightmost one-eighth region of the chromosome, from 43.5 Mb to 46.5 Mb. Five cycles of oscillation are observed in this region with six GC-rich peaks and five GC-poor valleys. The GC-poor valleys comprise regions with lo...

We demonstrate theoretically that spin dynamics of electrons injected into a GaAs semiconductor structure through a Schottky barrier possesses strong nonequilibrium features. The electrons injected are redistributed quickly among several valleys. Spin relaxation driven by the spin–orbital coupling in the semiconductor is very rapid. At T = 4.2 K, injected spin polarization decays at a distance ...