5 citations · 7 across the 6 of their papers we have counts for
4 papers · 1 filter
Dynamical non-Gaussian modelling of spatial processes
Thaís C. O. da Fonseca, Viviana G. R. Lobo, Alexandra M. Schmidt
Spatio-temporal processes in environmental applications are often assumed to follow a Gaussian model, possibly after some transformation. However, heterogeneity in space and time m…
A Hierarchical Dynamic Beta Regression Model of School Performance in the Brazilian Mathematical Olympiads for Public Schools
Alexandra M. Schmidt, Caroline P. de Moraes, Helio S. Migon
The Brazilian Mathematical Olympiads for Public Schools (OBMEP) is held every year since 2005. In the 2013 edition there were over 47,000 schools registered involving nearly 19.2 m…
Population counts along elliptical habitat contours: hierarchical modelling using Poisson-lognormal mixtures with nonstationary spatial structure
Alexandra M. Schmidt, Marco A. Rodríguez, Estelina S. Capistrano
Ecologists often interpret variation in the spatial distribution of populations in terms of responses to environmental features, but disentangling the effects of individual variabl…
Accounting for spatially varying directional effects in spatial covariance structures
Joaquim H. Vianna Neto, Alexandra Mello Schmidt, Peter Guttorp
Wind direction plays an important role in the spread of pollutant levels over a geographical region. We discuss how to include wind directional information in the covariance functi…