Recent Submissions

• El sistema alimentario global: I - definición de un espacio ﻿

(MINISTERIO DE AGRICULTURA, PESCA Y ALIMENTACION., 2013-10)
Article
Open Access
Los autores desarrollan su modelo de sistema alimentario global, presentado conceptualmente en anteriores publicaciones, basado en cuatro ejes básicos (disponibilidad, economía, política y saber) dándole una estructura ...
• Zero and coefficient inequalities for hyperbolic polynomials ﻿

(2006-03)
Article
Open Access
In this paper using classical inequalities and Cardan-Viète formulae some inequalities involving zeroes and coefficients of hyperbolic polynomials are given. Furthermore, considering real polynomials whose zeros lie in ...
• The normal distribution in some constrained sample spaces ﻿

(2013-01-01)
Article
Open Access
Phenomena with a constrained sample space appear frequently in practice. This is the case, for example, with strictly positive data, or with compositional data, such as percentages or proportions. If the natural measure ...
• An improvement of Ostrowski root-finding method ﻿

(2006-02)
Article
Restricted access - publisher's policy
An improvement to the iterative method based on the Ostrowski one to compute nonlinear equation solutions, which increases the local order of convergence is suggested. The adaptation of a strategy presented here gives a ...
• Wave height data assimilation using non-stationary kriging ﻿

(2011-03)
Article
Restricted access - publisher's policy
Data assimilation into numerical models should be both computationally fast and physically meaningful, in order to be applicable in online environmental surveillance. We present a way to improve assimilation for computationally ...
• Bayes linear spaces ﻿

(2010-12)
Article
Open Access
Linear spaces consisting of $\sigma$-finite probability measures and infinite measures (improper priors and likelihood functions) are defined. The commutative group operation, called perturbation, is the updating given by ...
• An experimental comparison of cokriging of regionalised compositional data using four different methods: case study3A Bauxites in Hungary-2 ﻿

(2004-02-04)
Article
Restricted access - publisher's policy
An important problem in the geosciences is the etimation or prediction or regionalized compositions. In fact, it is usual to deal with data such as percentages, concentrations, ppm,..., and use them to estimate values in ...
• Climate change in a Point-Over-Threshold model: an example on ocean-wave-storm hazard in NE Spain ﻿

(2010-09-27)
Article
Open Access
A reparametrization of the Generalized Pareto Distribution is here proposed. It is suitable to parsimoniously check trend assumptions within a Point-Over-Threshold model of hazardous events. This is based on considerations ...

(2009)
Article
Open Access
• Bayesian trend analysis for daily rainfall series of Barcelona ﻿

(2010-07-15)
Article
Open Access
A Point-Over-Threshold approach using a reparameterization of the Generalized Pareto Distribution (GPD) has been used to assess changes in the daily rainfall Barcelona series (1854–2006). A Bayesian approach, considering ...