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Alfredo Antonio Alegria Jimenez

Professor

Universidad Técnica Federico Santa María

Valparaíso, Chile

Líneas de Investigación


I am interested in the study of space-time random field models. Some of my themes of research are: Covariance Modeling, Fast Simulation Algorithms, Likelihood Approximations, Non-Gaussian Random Fields.

Educación

  •  PhD in Mathematics, UNIVERSIDAD TECNICA FEDERICO SANTA MARIA. Chile, 2017
  •  Mathematical Engineer, UNIVERSIDAD TECNICA FEDERICO SANTA MARIA. Chile, 2014

Experiencia Académica

  •   Research Associate Full Time

    UNIVERSITY OF NEWCASTLE UPON TYNE

    Reino Unido

    2017 - 2018

  •   Professor Full Time

    UNIVERSIDAD TECNICA FEDERICO SANTA MARIA

    Chile

    2018 - At present

Experiencia Profesional

  •   Académico Full Time

    Universidad Técnica Federico Santa María

    Valparaíso, Chile

    2018 - At present

  •   Research Associate Full Time

    University of Newcastle

    Newcastle Upon Tyne, Reino Unido

    2017 - 2018


 

Article (11)

Cross‐Dimple in the Cross‐Covariance Functions of Bivariate Isotropic Random Fields on Spheres

Alegría, Alfredo

Article
Stat  (2020)

The turning arcs: a computationally efficient algorithm to simulate isotropic vector-valued Gaussian random fields on the d-sphere

Alegría, Alfredo; Emery, Xavier; Lantuéjoul, Christian

Article
Statistics and Computing  (2020)

Axially symmetric models for global data: A journey between geostatistics and stochastic generators

Porcu, E; Castruccio, S; Alegria, A; Crippa, P

Article ISI SCOPUS
ENVIRONMETRICS  (2019)

Covariance functions for multivariate Gaussian fields evolving temporally over planet earth

Alegría A.; Porcu E.; Furrer R.; Mateu J.

Article ISI SCOPUS
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT  (2019)

Asymmetric matrix-valued covariances for multivariate random fields on spheres

Alegria, A; Porcu, E; Furrer, R

Article ISI SCOPUS
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION  (2018)

Modeling Temporally Evolving and Spatially Globally Dependent Data

Porcu, E; Alegria, A; Furrer, R

Article ISI SCOPUS
INTERNATIONAL STATISTICAL REVIEW  (2018)

Regularity properties and simulations of Gaussian random fields on the sphere cross time

De la Cerda, JC; Alegria, A; Porcu, E

Article ISI SCOPUS
ELECTRONIC JOURNAL OF STATISTICS  (2018)

Estimating covariance functions of multivariate skew-Gaussian random fields on the sphere

Alegria, A; Caro, S; Bevilacqua, M; Porcu, E; Clarke, J

Article ISI SCOPUS
Spatial Statistics  (2017)

The dimple problem related to space-time modeling under the Lagrangian framework

Alegria, A; Porcu, E

Article ISI SCOPUS
Journal of Multivariate Analysis  (2017)

Composite Likelihood Inference for Multivariate Gaussian Random Fields

Bevilacqua, Moreno; Alegria, Alfredo; Velandia, Daira; Porcu, Emilio

Article
Journal of Agricultural, Biological, and Environmental Statistics  (2016)

Likelihood-based inference for multivariate space-time wrapped-Gaussian fields

Alegría A; Bevilacqua, M; Porcu, E

Article ISI SCOPUS
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION  (2016)

Proyecto (2)

New Developments in Multivariate Spatial Statistics: Anisotropies by Components, Cross-Dimples, and Non-Normal Distributions, and their Applications

Alegria, Alfredo

Proyecto
 (2019)

SPATIO-TEMPORAL MODELS BASED ON RANDOM FIELDS EVOLVING ON THE SPHERE WITH APPLICATIONS TO CONTAMINATION, MINING AND NATURAL CATASTROPHES

FONDECYT (1130647)

Proyecto
2013-2017
Tesista

11
Alfredo Alegria

Professor

Matemática

Universidad Técnica Federico Santa María

Valparaíso, Chile

2
Moreno Bevilacqua

Profesor Asociado

Universidad Adolfo Ibánez

Viña del Mar, Chile

1
Emilio Porcu

Professor

Mathematics

Universidad Técnica Federico Santa María

Valparaiso, Chile