Volume 15, No. 2.
julio-diciembre de 2015

Table of contents

1. Editorial

   Herman Antonio Fernandez Gonzalez

   5

   • Abstract 352
     
   • PDF (Español) 321
     

   PDF (Español)

1. Speleological study of the cavern of the Ecce homo hill, in the municipality of Chimichagua, Cesar

   Frank David Lascarro-Navarro, Fernando Miguel Cormane-Tamayo, Elías Ernesto Rojas-Martínez

   6-14

   • Abstract 2060
     
   • PDF (Español) 614
     

   PDF (Español)

2. Comparison of nonparametric estimators versus parametric for reliability function

   Javier Ramírez-Montoya

   15-24

   • Abstract 725
     
   • PDF (Español) 539
     

   PDF (Español)

3. New record of Pseudocidaris sp. (Echinoidea:Hemicidaridae) of lower Cretaceous (Valanginian-Hauterivian) from Zapatoca, (Santander Colombia).

   Javier Hernando Jerez-Jaimes, Alvaro Sergio Osma-Duarte, Joan Sebastián Puentes-Pérez

   25-30

   • Abstract 857
     
   • PDF (Español) 493
     

   PDF (Español)

4. Justification for a regulatory proposal for sound broadcasting and transmobile services in Colombian borders

   Natalia Andrea Duarte-Pinilla, Hernán Paz-Penagos

   31-41

   • Abstract 1136
     
   • PDF (Español) 443
     

   PDF (Español)

5. The Doherty Power Amplifier with pre-amplification stage

   Jonathan Javier Tinjacá-Soler, William Alexander Cuevas-Carrero, Edison Ferney Angarita-Malaver, Jorge Julián Moreno-Rubio

   42-46

   • Abstract 693
     
   • PDF (Español) 569
     

   PDF (Español)

6. Robust Controller LMI for helicopter with two degrees of freedom

   Oscar Iván Higuera-Martínez, Juan Mauricio Salamanca

   47-57

   • Abstract 858
     
   • PDF (Español) 711
     

   PDF (Español)