• MATHEMATICAL MODEL FOR TOXIN TRANSPORT IN A MARINE FOOD CHAIN 

      Arbeláez A., Daniel; Ruiz V., Jorge Mauricio (2014-07-01)
      Some cases of poisoning by consumption of contaminated fish, like the Ciguatera poisoning, occur unexpectedly and they are not easy to detect previously since the fish that carry the toxin do not have appearance and/or ...
    • MORTALITY AMONG YOUNG NICARAGUAN IMMIGRANTS TO COSTA RICA: AN APPLICATION OF GEOGRAPHICALLY WEIGHTED STATISTICAL REGRESSION 

      Bonilla Carrión, Róger Enrique; Chavarría, Juan B. (2014-07-01)
      This paper applies a geographically weighted statistical regression (GWR) model to young Nicaraguan immigrant homicides in Costa Rica during the period 1998-2008 and identifies possible covariates. The pa- rameters for the ...
    • NONLINEAR FILTERS TO RECONSTRUCT ELECTROCARDIOGRAM SIGNALS 

      Infante, Saba; Sánchez, Luis; Cedeño, Fernando (2014-07-01)
      ECG signals have been used in cardiac pathology to detect disease heart. The main objective of this paper is to propose signal filtering techniques to reduce noise, extract information, to reconstruct the states and ...
    • SUPERIOR ORDER G -STRUCTURES 

      Rosales Ortega, José (2014-07-01)
      In this article we study the basic facts about superior order G-structures, then we show that the set of infinitesimally automorphisms of a geometric G-structure is a closed Lie group.