Although global food demand is expected to increase 60% by 2050 compared with 2005/2007, the rise will be much greater in sub-Saharan Africa (SSA). Indeed, SSA is the region at greatest food security risk because by 2050 its population will increase 2.5-fold and demand for cereals approximately triple, whereas current levels of cereal consumption already depend on substantial imports. At issue ...

In the spectra of photoemission quantum yield p-GaAs(Cs,O) measured in reflection geometry, a peak was found at photon energy lower than band gap GaAs. It is shown that appearance due to trapping weakly absorbed radiation, which scatters diffusely on rough back face epitaxial structure. Possible microscopic mechanisms are discussed: Franz-Keldysh effect surface electric field and adsorption-mod...

To classify the finite dimensional pointed Hopf algebras with Weyl group G of E6, E7, F4, G2, we obtain the representatives of conjugacy classes of G and all character tables of centralizers of these representatives by means of software GAP. 2000 Mathematics Subject Classification: 16W30, 68M07 keywords: GAP, Hopf algebra, Weyl group, character.