Weather observations in Zafra during the period 1750 to 1840 have been compiled and studied. Zafra was the capital of the Duchy of Feria, located in the southwest of the Iberian Peninsula. The documentary sources used in this work are weekly reports submitted to the Duke (who lived in Madrid)...

Ridge regression has been widely applied to estimate under collinearity by defining a class of estimators that are dependent on the parameter <italic>k</italic>. The variance inflation factor (VIF) is applied to detect the presence of collinearity and also as an objective method to obtain the value of <italic>k</italic> in ridge...

In this work we propose a highly optimized version of a simulated annealing (SA) algorithm adapted to the more recently developed graphic processor units (GPUs). The programming has been carried out with compute unified device architecture (CUDA) toolkit, specially designed for Nvidia GPUs. For...

Die Verfasser skizzieren zunächst die seit der Sowjetära fortbestehende Struktur der Landwirtschaft in Usbekistan, die Agrarproduktion und das für die usbekische Landwirtschaft zentrale Problem der Bewässerung. Sie machen im folgenden anhand eines internationalen Vergleichs der...