the objectives of this study was to estimation of greenhouse gases (ghg) emissions and global warming in rice production and identify measures to reducing fossil energy use and greenhouse gases emissions. three rice production systems included sri, improved and conventional were studied. all activities, field operation and data in production methods and differents inputs rates were monitored an...

Résumé Cet article présente un estimateur de densité spectrale défini à partir d’un estimateur du Minimum de Variance (MV) Normalisé tel que celui proposé par Lagunas. Avec une résolution fréquentielle équivalente, l’objectif de ce nouvel estimateur est de préserver l’estimation de l’amplitude contrairement à l’estimateur de Lagunas. Cette proposition s’appuie sur l’étude de la fonction de tran...

The question of how one should decide among competing explanations of data is at the heart of the scientific enterprise. Quantitative methods of selecting among models have been advanced over the years without an underlying theoretical framework to guide the enterprise and evaluate new developments. In this paper, we show that differential geometry provides a unified understanding of the model ...

THE MOST commonly reproduced portrait of the mathematician and physiologist Giovanni Alfonso Borelli is a lithograph after Pierre Roch Vigneron (1789-1872).1 which forms one of a series of portraits of medical worthies by Vigneron lithographed by G. Engelmann as a commercial venture a century and a half after Borelli's death in 1679. I do not know the source of Vigneron's portrait, which shows ...

In this paper we study the minimum distance between the set of bent functions and the set of 1-resilient Boolean functions and present a lower bound on that. The bound is proved to be tight for functions up to 10 input variables. As a consequence, we present a strategy to modify the bent functions, by toggling some of its outputs, in getting a large class of 1-resilient functions with very good...