A SINGULAR METEORIC PHENOMENON

A singular large deviations phenomenon

A KAM phenomenon for singular holomorphic vector fields

Let X be a germ of holomorphic vector field at the origin of C and vanishing there. We assume that X is a “nondegenerate” good perturbation of a singular completely integrable system. The latter is associated to a family of linear diagonal vector fields which is assumed to have nontrivial polynomial first integrals. We show that X admits many invariant analytic subsets in a neighborhood of the ...

A global atmospheric model of meteoric iron

[1] The first global model of meteoric iron in the atmosphere (WACCM-Fe) has been developed by combining three components: the Whole Atmosphere Community Climate Model (WACCM), a description of the neutral and ion-molecule chemistry of iron in the mesosphere and lower thermosphere (MLT), and a treatment of the injection of meteoric constituents into the atmosphere. The iron chemistry treats sev...

Child Soldiers in Africa: A Singular Phenomenon? On the necessity of a historical perspective

In the case of the African conflicts, the issue of children in war was initially the prerogative of humanitarian organizations. Moreover, interest in this issue is relatively recent. In the 1990s, sub-Saharan Africa was marked by a long series of civil conflicts (in Liberia, Sierra Leone, Somalia, Burundi, Rwanda, CongoBrazzaville, the Democratic Republic of the Congo, Sudan, Ivory Coast, etc.)...

Semi-Molten Meteoric Iron Associated with a Crop Formation

We report the unusual discovery of a natural iron "glaze" composed of fused particles of meteoritic origin, concentrated entirely within a crop formation in England, appearing shortly after the intense Perseid meteor shower in August, 1993. Physical and chemical characteristics as well as spatial distributions indicated reheating to a semi-molten state at the time of crop impact, suggesting inv...