2,340,753 research outputs found
Federico Santa María vestimenta Japonesa Viaje a Japón, Tokio 1896
No full textFederico Santa María vestido con Kimono en Tokio, Japó
A mathematical model of flavescence dorée epidemiology
No full textFlavescence dorée (FD) is a disease of grapevine transmitted by an insect vector, Scaphoideus titanus Ball.
At present, no prophylaxis exists, so mandatory control procedures (e.g. removal of infected plants, and
insecticidal sprays to avoid transmission) are in place in Italy and other European countries. We propose
a model of the epidemiology of FD by taking into account the different aspects involved into the transmis-
sion process (acquisition of the disease, latency and expression of symptoms, recovery rate, removal and
replacement of infected plants, insecticidal treatments, and the effect of hotbeds). The model was con-
structed as a system of first order nonlinear ODEs in four compartment variables. A bifurcation analysis
shows that, in the absence of hotbeds, the state of healthy vineyard is stable, if removal and replacement
of infected plants is implemented. In the presence of hotbeds, depending on the grapevine density, we
find either a single family of equilibria in which the health of the vineyard gradually deteriorates for pro-
gressively more severe hotbeds, or multiple equilibria that give rise to sudden transitions from a nearly
healthy vineyard to a highly deteriorated one when the severity of the hotbeds crosses a critical value.
These results show the long-term risks in planting new vineyards in environmental situations where
strong hotbeds of FD are present or may arise in the surroundings
Federico-Tena World Population Historical Database : Africa
No full textProject developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: Afric
Federico-Tena World Population Historical Database : Cuba
No full textProject developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: Cub
Federico-Tena World Population Historical Database : Honduras
No full textProject developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: Hondura
Federico-Tena World Population Historical Database : Luxembourg
No full textProject developed by Giovanni Federico (New York University Abu Dhabi) and Antonio Tena Junguito (Universidad Carlos III de Madrid). Dataset: Luxembour
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