We discuss a conjecture which says that the automorphism group of the Weyl algebra in characteristic zero is canonically isomorphic to the automorphism group of the corresponding Poisson algebra of classical polynomial symbols. Several arguments in favor of this conjecture are presented, all based on the consideration of the reduction of the Weyl algebra to positive characteristic.

Nonperturbative nolocal structure of QCD vacuum is well described by instanton model. Specific helicity and flavor structure of zero modes of quarks in instanton field allows simultaneously to explain some important features of lowand highenergy hadron phenomemology. The basic characteristics of hadron spectrum, partonic sum rules, heavy-quark potential are briefly discussed within the instanto...

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Extended phase space of an elementary (relativistic) system is introduced in the spirit of the Souriau’s definition of the ‘space of motions’ for such system. Our ‘modification’ consists in taking into account not only the symmetry (Poincaré) group but also its action on the (Minkowski) space-time, i.e. the full covariant system. This yields a general procedure to construct spaces in which the ...

The well-known hierarchy between the Planck scale (∼ 10GeV) and the TeV scale, namely a ratio of ∼ 10 between the two, is coincidentally repeated in a inverted order between the TeV scale and the dark energy scale at ∼ 10eV implied by the observations. We argue that this is not a numerical coincidence. The same brane-world setups to address the first hierarchy problem may also in principle addr...

AIMS Low glycaemic index (GI) diets are beneficial in the management of hyperglycemia. Cardiovascular diseases are the major cause of mortality in diabetes therefore it is important to understand the effects of GI on blood lipids. The aim was to systematically review randomised controlled trials (RCTs) of low GI diets on blood lipids. DATA SYNTHESIS We searched OVID Medline, Embase and Cochra...

The presence of arsenic in water for human consumption is concern, especially developing countries, and the design simple economic treatments removal imperative. In this paper, three low-cost technologies were evaluated As(V) or As(III) (5 mg L?1) removal: (1) zerovalent iron (Fe(0)), as powdered (?Fe(0)) wool (wFe(0)); (2) coagulation-flocculation with Al2(SO4)3 FeCl3; (3) adsorption on a natu...